CN117265773A - Unidirectional moisture-conducting, moisture-absorbing and quick-drying non-woven material and preparation method and application thereof - Google Patents

Abstract

The invention discloses a one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material, which includes the following mass fraction of raw materials: 30% to 70% of hydrophilic polyester fiber mesh, 30% to 70% of special-shaped cross-section polyamide 6 fiber mesh; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material The basis weight of the moisture-absorbing and quick-drying nonwoven material is 50-100g/ ^m2 ; the special-shaped cross-section is at least one of a triangular cross-section, a trilobal cross-section or a cross-star cross-section; the one-way moisture-absorbing and fast-drying nonwoven material Has a pore structure. The material is soft and lint-free during use, and has good air permeability and hygroscopicity. The two fibers have different hydrophilicity and hydrophobicity, and the polyamide fiber's special-shaped cross-section and pore grooves achieve one-way moisture conductivity, and can quickly evaporate water to form a moisture-absorbing and quick-drying material. Performance, can be used in fast-paced life, short-term outing towels and moisture-absorbing and quick-drying products.

Description

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material and its preparation method and application

Technical field

The invention belongs to the technical field of industrial textiles, and particularly relates to a one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material and its preparation method and application.

Background technique

With the rapid development of society, people travel more and more frequently, which has led to the rapid development of the market and increased demand for products that provide convenience for travel and save time, such as moisture-absorbing and quick-drying clothing, compressed towels, and hair drying caps. Dry towels and hair drying caps are also a type of moisture-absorbing and quick-drying products that have emerged in recent years. Their research is still limited to traditional cotton fiber or viscose fiber fabrics, or synthetic fibers made through post-processing. For example, patent CN202211285275 introduces a moisture-absorbing and quick-drying material made of a blend of porous polyester fiber, bamboo charcoal modified fiber and silk. The special porous polyester fiber and bamboo charcoal modified fiber structure can give the fabric excellent moisture absorption and quick-drying properties. Patent CN202210824868 introduces a hygroscopic and quick-drying fabric obtained by spinning and weaving ramie fibers after antibacterial treatment. The large gaps in the ramie fiber structure are used to produce a fabric with good air permeability, strong water absorption capacity, and fast moisture dissipation. fabric. After Li Shufang et al. subjected polyester and nylon fabrics to atmospheric pressure plasma treatment, they studied the moisture absorption and quick-drying properties of synthetic fiber fabrics through tests of contact angle and longitudinal wicking height, and found that the moisture absorption performance was significantly improved. Zhao Lihuan et al. tested and compared the moisture absorption and quick-drying performance, bending resistance length and lint rate of orange-petal filament nonwoven towels and cotton loop towels, and found that the moisture absorption and quick-drying properties of orange-petal filament nonwoven towels reached It meets the national standard requirements, and the longer the washing time, the softer the fabric and the smaller the lint loss rate.

For the above-mentioned moisture-absorbing and quick-drying fabrics, although they have good water absorption, there are problems such as complex production processes, low production efficiency, difficulty in drying the product after absorbing water, large size, high price, etc., making it impossible to make disposable products. Orange petal filament nonwoven materials have higher equipment investment costs, resulting in higher product costs. Although they can achieve moisture absorption and quick drying properties, they cannot achieve one-way moisture conduction properties.

With the improvement of people's health care awareness and changes in consumption habits, the market demand for disposable sanitary products has shown an increasing trend. Especially with the liberalization of domestic multiple-child policy and the aging of the world's population, people's demand for high-end disposable sanitary products has increased. The consumption and performance requirements of sanitary products are increasing rapidly. Diapers are a convenient sanitary care product designed for infants, middle-aged and elderly people with urinary incontinence and paralyzed patients. Since the product needs to be in contact with the user's skin, it is required to have certain dryness and liquid absorption capabilities. Current diapers are generally composed of four layers: top layer, diversion layer, absorbent core layer and bottom film. The diversion layer is located between the top layer and the absorbent core layer. It needs to quickly conduct the liquid received by the top layer to the absorbent core layer. Keep the surface material in contact with the skin dry, and prevent the liquid absorbed by the absorbent core from flowing back and affecting the surface material. Someone has done experiments and found that after adding a diversion layer, the liquid is fully absorbed by the diversion layer material and is less likely to accumulate on the surface of the diaper, thus reducing the amount of back seepage by nearly half, and the diversion layer delays the penetration of liquid. , the core layer can have more time and absorption area to absorb liquid, thereby effectively preventing a large amount of liquid from being absorbed instantly and causing local gel blocking. Therefore, the setting of the diversion layer is very beneficial to improving the performance of diapers.

The currently commonly used flow guide layer is made of ES fiber as raw material and is bonded by carding and hot air. Affected by the structure and thickness of the flow guide layer, ordinary hot air non-woven flow guide layers take a long time for liquid to penetrate and cannot absorb liquid. It quickly spreads in the absorbent core layer, resulting in low liquid absorption rate of the absorbent core layer. Therefore, improvements to the structure of the flow guide layer are relatively concentrated. For example, Wang Huan et al. prepared a double-layer composite flow guide layer material composed of a flow guide layer and a damping layer. , using the differential capillary effect of two layers of fiber mesh to prevent liquid back seepage; Zheng Lei and others used hot air penetration bonding technology to prepare a multi-layer composite flow guide layer with a wavy cross-section in the middle layer, and discussed the effects of different fiber densities on the flow guide layer. The influence of the flow layer; although these studies have achieved the unidirectional moisture conduction function and improved the flow conduction performance, the preparation of the product is not completed in one step online, especially the speed matching of the corrugated structure material during the unwinding and transportation process will affect The structure of the product affects the diversion performance. Yue Pengfei et al. used ES fiber and PP fiber to blend to prepare the flow guide layer material, and studied the influence of the blending ratio and preparation process on the performance of the flow guide layer. However, the flow conductivity was improved after blending and could not effectively solve the problem of one-way moisture conduction. Therefore, the dryness problem of surface materials cannot be fundamentally solved. Therefore, there is an urgent need to find a one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material and a preparation method thereof.

Contents of the invention

The present invention aims to solve the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material and its preparation method and application. The prepared one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material does not shed flakes during use, and has good air permeability and moisture permeability. It has one-way moisture conductivity, can keep the surface in contact with liquid dry, and absorbs moisture and dries quickly. The preparation method has simple production process, high production efficiency and low cost.

According to the first aspect of the present invention, a one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material is proposed, including the following mass fraction of raw materials: 30% to 70% of hydrophilic polyester fiber mesh, 30% to 70% of special-shaped cross-section polyamide 6 fiber mesh ; The basis weight of the one-way moisture-conductive and quick-drying nonwoven material is 50-100g/m ² ; the special-shaped cross-section is at least one of a triangular cross-section, a trilobal cross-section or a cross-star cross-section; the one-way moisture-conductive and quick-drying nonwoven material Moisture-absorbing, quick-drying nonwoven materials have a porous structure.

In some embodiments of the present invention, the specification of the hydrophilic polyester is 1.5D×38mm, and the fiber length of the special-shaped cross-section polyamide 6 is 38mm.

In some embodiments of the present invention, the pore structure of the one-way moisture-conductive and quick-drying nonwoven material contains porous silica moisture-conducting microspheres, and the content of the porous silica moisture-conducting microspheres is 5 to 20 %; and/or, the particle size of the porous silica moisture-conducting microspheres is 50 to 200 nm; and/or, the pore size of the porous silica moisture-conducting microspheres is about 15 nm.

According to a second aspect of the present invention, a method for preparing the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material is proposed, which includes the following steps:

(1) The hydrophilic polyester fiber is spunlaced through a rotary mesh to obtain a hydrophilic polyester fiber web after spunlace; the hydrophilic polyester fiber web after spunlace is sent under the steel pipe in the flat mesh spunlace area with a steel pipe support;

(2) The polyamide 6 fiber with special-shaped cross-section is fed into the top of the steel pipe in the spunlace area of the flat mesh, and is combined with the hydrophilic polyester fiber mesh after spunlace obtained in step (1), and then dried to obtain One-way moisture-absorbing and quick-drying non-woven material.

In some embodiments of the present invention, the hydrophilic polyester fibers are opened and mixed, carded into a web, and cross-laid before being subjected to rotary mesh spunlace. The use of rotary mesh spunlace can save space.

In some embodiments of the present invention, the polyamide 6 fibers with special-shaped cross-sections are first opened, mixed and carded into a web before being sent to the top of the steel pipe in the flat mesh spunlace area.

The invention adopts a method of combining double carding machines with rotary mesh and flat mesh spunlace. One of the carding machines is equipped with a laying device, and the hydrophilic polyester fibers are opened, mixed, carded into a mesh, and cross-laid to form a fiber mesh. It is sent to the spunlace area of the rotary mesh for spunlace entanglement, and then sent to the flat mesh spunlace area with a steel pipe support under the steel pipe; another carding machine without a laying device opens and mixes the polyamide 6 fibers with special-shaped cross-sections. , the parallel fiber web formed by carding into a web is sent to the top of the steel pipe in the flat web spunlace area with a steel pipe support, and is compounded with the hydrophilic polyester web that is cross-laid after round web spunlace through hydroentanglement. In the flat mesh spunlace area, a series of parallel steel pipes in the same width as the output direction of the fiber mesh are set up as required. During the spunlace process, the part with the steel pipe maintains two layers of fiber mesh, leaving a pore structure corresponding to the size of the steel pipe in the middle; and In the part without steel pipes, the two layers of fiber mesh are completely tangled together to form a layer of fiber mesh, forming a unidirectional moisture-conducting, moisture-absorbing and quick-drying nonwoven material with a controllable structure.

In some embodiments of the present invention, in step (2), when performing composite hydroentangling, the step of transporting porous silica moisture-conducting microspheres into the interior of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material is also included.

In some embodiments of the present invention, the steel pipe support is composed of steel pipes arranged in parallel in the width direction of the fiber web, and the axis of the steel pipe is parallel to the output direction of the fiber web; the porous silica moisture-conducting microspheres It is input into the steel pipe in the flat mesh hydroentangled area through the input pipe, and then enters the inside of the one-way moisture-absorbing and quick-drying nonwoven material from the other end of the steel pipe.

The one-way moisture-absorbing and quick-drying nonwoven material has a controllable three-dimensional network (pore) structure composed of hydrophilic polyester fibers and polyamide 6 fibers with special-shaped cross-sections. The pores can be filled with porous materials according to the application and performance requirements of the product. Silica moisture-conducting microspheres. In the spunlace process, the cross-laid hydrophilic polyester fiber mesh is first fixed with rotary mesh spunlace as the bottom layer, and then combined with the parallel-laid polyamide 6 fiber mesh with special-shaped cross-section, and the spunlace is entangled. During the process, porous silica moisture-conducting microspheres are continuously fed into the steel pipe. The steel pipe can prevent the porous silica moisture-conducting microspheres from being destroyed by the water needle pressure and remaining in the pores of the non-woven material. The steel pipe directly extends out of the spunlace area, and is lightly pressed with a round roller in the end area of the steel pipe to keep the hole structure and surface of the spunlace nonwoven material corresponding to the steel pipe smooth, and then sent to the three-layer flat mesh drying room device for drying, and finally cut. The edges are rolled to form the one-way moisture-conducting, moisture-absorbing and quick-drying spunlace nonwoven material.

In some embodiments of the present invention, in step (1), the basis weight of the hydrophilic polyester fiber web in the spunlace area of the cylinder is 30 to 50 g/m ²

In some embodiments of the present invention, in step (1), the rotary mesh spunlace is performed using four spunlaces, and the water pressures are 3MPa, 3MPa, 5MPa and 6MPa respectively.

In some embodiments of the present invention, in step (2), the basis weight of the polyamide 6 fiber web with special-shaped cross-section in the spunlace area of the flat web is 20 to 50 g/m ²

In some embodiments of the present invention, in step (2), the flat mesh hydroentanglement uses four hydroentanglements for composite hydroentanglement, and the water pressures are 3MPa, 6MPa, 9MPa and 9-12MPa respectively.

The flat mesh spunlace area is provided with a second vacuum water suction box. The second vacuum water suction box is a vacuum box located under the second spunlace head. The opening at one end of the vacuum box is close to the supporting mesh curtain and is close to the side of the console. Suction air creates negative pressure in the box, sucking out most of the moisture on the supporting mesh curtain and in the fiber mesh, which facilitates the smooth progress of the next spunlace and saves energy consumption during drying.

In some embodiments of the present invention, the flat mesh spunlace area is provided with steel pipes parallel to the width direction of the fiber mesh, the axis of the steel pipe is parallel to the output direction of the fiber mesh, and the spacing between the steel pipes is 5 to 15 mm. The diameter of the steel pipe is 3-5mm.

In some embodiments of the present invention, in step (2), the drying process is carried out in a three-layer flat mesh drying room, the temperature of the lower layer is 100-105°C, the temperature of the middle layer is 108-110°C, and the temperature of the upper layer is 112 ~118℃. The length of the drying room is 4 meters, and the temperature setting range of the drying room is 100-120°C. It is then rolled to form a one-way moisture-absorbing and quick-drying non-woven material.

In the one-way moisture-absorbing and quick-drying nonwoven material, hydrophilic polyester fiber is mainly used to improve the spunlace performance of the material and form a water-absorbent layer of the material; polyamide 6 fiber with special-shaped cross-section is mainly used to improve the wicking effect of the material. Form the hydrophobic layer of the material; the one-way moisture conductivity is formed through the difference in hydrophilic and hydrophobic properties of the two-layer fiber webs, and the regular pore structure and special-shaped cross-section fibers are used to achieve moisture absorption and quick drying function; porous silica moisture-conducting microspheres are used to improve the material The moisture conduction rate keeps the contact surface dry better.

According to the third aspect of the present invention, a nonwoven material production equipment is proposed for performing the preparation method described in the second aspect of the present invention, including an opening device, a carding device, a spunlace device, and a drying device that are connected in sequence. , trimming device and winding device; the spunlace device includes a rotary mesh spunlace machine and a flat mesh spunlace machine, and the rotary mesh spunlace machine is connected to the flat mesh spunlace machine; the flat mesh spunlace machine A steel pipe support is provided, and the steel pipe support is composed of steel pipes arranged parallel to the width direction of the fiber web, and the axis of the steel pipe is parallel to the output direction of the fiber web.

In some embodiments of the present invention, the opening device includes a first opening machine and a second opening machine, the carding device includes a first carding machine and a second carding machine, and the first opening machine and The first carding machine is connected, and the second opening machine is connected with the second carding machine.

In some embodiments of the present invention, the first carding machine is connected to a circular mesh hydroentanglement machine, and the second carding machine is connected to a flat mesh hydroentanglement machine; preferably, the first carding machine is connected to the circular mesh hydroentanglement machine. There is also a cross-laying machine between the mesh spunlace machines. The cross-laying machine transports the fiber web output from the first carding machine to the rotary mesh spunlace machine. The fiber mesh output from the rotary mesh spunlace machine The fiber web enters under the steel pipe support of the flat-mesh hydroentanglement machine; there is also a mesh-laying curtain between the second carding machine and the flat-mesh hydroentanglement machine, and the mesh-laying curtain controls the output of the second carding machine. The fiber web is transported to the top of the steel pipe support of the flat web hydroentanglement machine. The present invention also provides the application of the above-mentioned one-way moisture-absorbing and quick-drying nonwoven materials in disposable moisture-absorbing and quick-drying products.

According to a preferred embodiment of the present invention, it has at least the following beneficial effects:

1. The present invention uses hydrophilic polyester and special-shaped cross-section polyamide 6 fibers as raw materials, respectively carded into a web to form a spunlace nonwoven material with a pore structure, and utilizes the different hydrophilic and hydrophobic properties of the two-layer fiber webs and the special-shaped cross-section of the polyamide fiber. And the pore grooves after spunlace achieve one-way moisture conductivity, and can quickly evaporate water to form moisture absorption and quick-drying properties.

2. The pores of the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material of the present invention are continuously fed with porous silica moisture-conducting microspheres during the web fixing process, which can increase the moisture conduction rate; and porous materials are added during the spunlace web fixing process. Silica moisture-conducting microspheres can also simplify functional finishing equipment. The production speed is not affected by the post-finishing process, and can directly form one-way moisture-conducting and moisture-absorbing quick-drying non-woven materials in one step, so the product's cost performance is greatly improved.

3. The one-way moisture-wicking and quick-drying spunlaced nonwoven material of the present invention is soft, lint-free, and has good air permeability and moisture absorption during use. The two fibers have different hydrophilicity and hydrophobicity, as well as the polyamide fiber’s special-shaped cross-section and pore grooves. The groove achieves one-way moisture conductivity and can quickly evaporate water to form moisture absorption and quick-drying properties; another one-way moisture-conduction and quick-drying spunlace nonwoven material is formed by feeding porous silica moisture-conducting microspheres into the pore structure. In addition to maintaining the performance of the previous product, this material can conduct moisture faster. The product can be used in fast-paced life, short-term outing towels, hair drying caps and other moisture-absorbing and quick-drying products, as well as infant diapers, sanitary napkins, and adult diapers. Products such as the flow guide layer of pants that need to absorb moisture and dry quickly to keep the contact surface dry.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples, wherein:

Figure 1 is a schematic cross-sectional view of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material prepared in Example 1 of the present invention.

Figure 2 is a schematic cross-sectional view of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material prepared in Example 2 of the present invention.

Figure 3 is a schematic diagram of the process flow of Embodiment 2 of the present invention.

Figure 4 is a schematic diagram of drying the fiber web in the rotary screen, flat screen spunlace areas and the three-layer flat screen drying room during the preparation process of Example 1 of the present invention.

Figure 5 is a schematic diagram of drying the fiber web in the rotary screen, flat screen spunlace areas and the three-layer flat screen drying room during the preparation process of Example 2 of the present invention.

Figure 6 is an electron microscope image of a trilobal cross-section polyamide 6 fiber.

Figure 7 is an electron microscope image of the hydrophobic layer of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material prepared in Example 1 of the present invention.

Reference signs:

100. The first opening machine; 110. The second opening machine; 120. Fiber conveying curtain; 130. The first carding machine; 140. The second carding machine; 150. Laying curtain; 160. Cross laying machine; 170 .Rotary mesh spunlace machine; 180. Flat mesh spunlace machine; 190. Steel pipe; 200. Round roller; 210. Three-layer flat mesh drying room; 220. Trimming machine; 230. Winding machine;

171. The first pre-wet head; 172. The first hydro-entangling head; 173. The first vacuum suction tank; 181. The second pre-wetting head; 182. The second hydro-entangling head; 183. The second vacuum suction tank;

240. Cross-laid hydrophilic polyester fiber mesh; 250. Parallel-laid polyamide 6 fiber mesh with special-shaped cross-section; 260. Porous silica moisture-conducting microspheres; 270. Lower layer mesh curtain; 280. Middle layer mesh curtain ; 290. Upper mesh curtain; 300. One-way moisture-absorbing and quick-drying non-woven material.

Detailed ways

The concept of the present invention and the technical effects produced will be clearly and completely described below with reference to the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without exerting creative efforts are all protection scope of the present invention. Among them, the hydrophilic polyester fiber and special-shaped cross-section polyamide 6 in the examples are both from Yizheng Chemical Fiber Co., Ltd.

Example 1

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 64% hydrophilic polyester fiber web, 36% polyamide 6 fiber web with special-shaped cross-section; the quantitative quantity of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 55g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material has a pore structure.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 9MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 10mm.

(3) There is a round roller that lightly presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth, and then it is sent into a three-layer flat mesh dryer with a length of 4 meters. For drying in the room, the temperature of the lower layer is set to 100°C, the temperature of the middle layer is set to 108°C, the temperature of the upper layer is set to 115°C, and the speed of the drying hot air flow is 2m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material. The cross-section of the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material is shown in Figure 1; the special-shaped cross-section polyamide 6 fiber has a trilobal cross-section, and the electron microscope picture is shown in Figure 6; the hydrophobic layer (special-shaped cross-section polyamide 6 fiber mesh ) is shown in Figure 7.

The drying process of fiber mesh in the rotary mesh, flat mesh spunlace area and three-layer flat mesh drying room is shown in Figure 4, including the following steps:

The cross-laid hydrophilic polyester fiber web 240 is prewetted by the first prewet head 171 in the rotary screen spunlace, and then passes through the four first spunlace heads 172 arranged in the circumference for spunlace entanglement. The water pressure is set from It gradually rises from back to front, and is transported under the steel pipe 190 in the flat mesh hydroentanglement machine 180 under the suction action of the first vacuum suction box 172; the parallel laid special-shaped cross-section polyamide 6 fiber mesh 250 is fed into the flat mesh The top of the steel pipe 190 of the spunlace machine 180 is prewetted by the second prewet head 181 and is combined with the hydrophilic polyester fiber mesh below the steel pipe 190 under the second spunlace head 182. The steel pipe 190 extends to the circle. The front end of the roller 200 maintains the pore structure and surface smoothness of the non-woven material under the light pressure of the round roller 200 and the flat mesh curtain, and plays a conveying role in the lower mesh conveying curtain 270, the middle mesh conveying curtain 280 and the upper mesh conveying curtain 290. , and then dried at 100 to 120°C to form a one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material 300, which is finally trimmed and rolled to form a finished product.

Example 2

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 58% hydrophilic polyester fiber web, 33% polyamide 6 fiber web with special-shaped cross-section; the quantitative amount of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 60g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material has a pore structure, and the pore structure contains porous silica moisture-conducting microspheres, and the porous silica The content of the silica moisture-conducting microspheres is 9%, the particle size of the porous silica moisture-conducting microspheres is 50 nm, and the pore size of the porous silica moisture-conducting microspheres is 15 nm.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 9MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 10mm.

(3) During the spunlace process, the running speed of the fiber web is 60m/min, and porous silica moisture-conducting microspheres are continuously fed into the steel pipe at the same speed. In the spunlace area, due to the protective effect of the steel pipe, moisture conductivity The microspheres are not affected and exit the spunlace area from the outlet end of the steel pipe into the pore structure of the one-way moisture-absorbing and quick-drying spunlace nonwoven material. There is a round roller that gently presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth.

(4) Send the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material into a three-layer flat mesh drying room with a length of 4 meters for drying. The temperature of the lower layer is set to 100°C, the temperature of the middle layer is set to 108°C, and the temperature of the upper layer is set to 100°C. The temperature is set to 115°C, and the speed of drying hot air flow is 2m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material.

The cross-section of the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material is shown in Figure 2.

A process flow for one-way moisture-conducting and moisture-absorbing quick-drying nonwoven materials, as shown in Figure 3, includes the following steps:

The first opening machine 100 opens the mixed hydrophilic polyester fiber, feeds it to the first carding machine 130 through the fiber conveying curtain 120, and then passes through the cross lapper 160 to lay the net, and then sends it to the rotary mesh spunlace machine 170 for spunlace, and then It is fed into the flat mesh hydroentanglement machine 180 and under the steel pipe 190; the second opening machine 110 opens the mixed polyamide 6 fiber with special-shaped cross-section and then feeds it to the second carding machine 140, and is transmitted to the flat mesh hydroentanglement machine 180 through the mesh curtain 150. The upper part of the steel pipe 190 is combined with the lower fiber mesh to form a spunlace nonwoven material with a pore structure. The entrance end of the steel pipe 190 can continuously feed porous silica moisture-conducting microspheres, and the pore structure and surface are kept smooth under the gentle pressure of the round roller 200 to ensure that the porous silica moisture-conducting microspheres can smoothly enter the spunlace non-woven fabric from the outlet end of the steel pipe 190. The wet one-way moisture-conducting and moisture-absorbing quick-drying spunlace nonwoven material is formed in the pore structure of the woven material, and then enters the three-layer flat screen drying room 210 for low-temperature drying, and then is cut by the trimming machine 220 and then wound into the winding machine 230. One-way moisture-absorbing and quick-drying spunlace nonwoven material.

The drying process of the fiber web in the rotary web, flat web spunlace area and three-layer flat web drying room is shown in Figure 5, including the following steps:

The cross-laid hydrophilic polyester fiber web 240 is prewetted by the first prewet head 171 in the rotary screen spunlace, and then passes through the four first spunlace heads 172 arranged in the circumference for spunlace entanglement. The water pressure is set from It gradually rises from the back to the front, and is transported under the steel pipe 190 in the flat mesh hydroentanglement machine 180 under the suction action of the first vacuum suction box 173; the parallel laid special-shaped cross-section polyamide 6 fiber mesh 250 is fed into the flat mesh The top of the steel pipe 190 of the spunlace machine 180 is prewetted by the second prewet head 181 and is combined with the hydrophilic polyester fiber mesh below the steel pipe 190 under the second spunlace head 182 to perform composite spunlace. The porous silica moisture-conducting microspheres 260 are continuously input, and the steel pipe 190 extends to the front end of the round roller 200. Under the light pressure of the round roller 200 and the flat mesh curtain, the pore structure and surface of the nonwoven material are maintained smooth, and the porous dioxide The silicon moisture-conducting microspheres 260 smoothly enter the pore structure of the non-woven material and remain before entering the three-layer flat screen drying room 210. Under the conveying action of the lower mesh conveying curtain 270, the middle mesh conveying curtain 280 and the upper mesh conveying curtain 290 , dried at 100-120°C to form a one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material 300, and finally trimmed and rolled to form a finished product.

Example 3

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 55% hydrophilic polyester fiber web, 45% polyamide 6 fiber web with special-shaped cross-section; the quantitative amount of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 55g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material has a pore structure.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 12MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 15mm.

(3) There is a round roller that lightly presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth, and then it is sent into a three-layer flat mesh dryer with a length of 4 meters. For drying in the room, the temperature of the lower layer is set to 105°C, the temperature of the middle layer is set to 110°C, the temperature of the upper layer is set to 118°C, and the speed of the drying hot air flow is 2m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material.

Example 4

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 50% hydrophilic polyester fiber web, 42% special-shaped cross-section polyamide 6 fiber web; the quantitative quantity of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 60g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material has a pore structure, and the pore structure contains porous silica moisture-conducting microspheres, and the porous silica The content of the silica moisture-conducting microspheres is 8%, the particle size of the porous silica moisture-conducting microspheres is 80 nm, and the pore size of the porous silica moisture-conducting microspheres is 15 nm.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 12MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 15mm.

(3) During the spunlace process, the running speed of the fiber web is 80m/min, and porous silica moisture-conducting microspheres are continuously fed into the steel pipe at the same speed. In the spunlace area, due to the protective effect of the steel pipe, moisture conductivity The microspheres are not affected and exit the spunlace area from the outlet end of the steel pipe into the pore structure of the one-way moisture-absorbing and quick-drying spunlace nonwoven material. There is a round roller that gently presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth.

(4) Send the wet unidirectional moisture-absorbing and quick-drying spunlace nonwoven material into a three-layer flat mesh drying room with a length of 4 meters for drying. The temperature of the lower layer is set to 105°C, the temperature of the middle layer is set to 110°C, and the temperature of the upper layer is set to 105°C. The temperature is set to 118°C, and the speed of drying hot air flow is 2m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material.

Example 5

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 50% hydrophilic polyester fiber web, 50% special-shaped cross-section polyamide 6 fiber web; the quantitative quantity of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 60g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material has a pore structure.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 12MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 10mm.

(3) There is a round roller that lightly presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth, and then it is sent into a three-layer flat mesh dryer with a length of 4 meters. For drying in the room, the temperature of the lower layer is set to 102°C, the temperature of the middle layer is set to 108°C, the temperature of the upper layer is set to 112°C, and the speed of the drying hot air flow is 3m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material.

Example 6

A one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material, including the following mass fraction of raw materials: 46% hydrophilic polyester fiber web, 46% special-shaped cross-section polyamide 6 fiber web; the quantitative quantity of the one-way moisture-conducting, moisture-absorbing, quick-drying nonwoven material is 65g/m ² ; the special-shaped cross-section is a trilobal cross-section; the one-way moisture-conducting and moisture-absorbing quick-drying nonwoven material has a pore structure, and the pore structure contains porous silica moisture-conducting microspheres, and the porous silica The content of the silica moisture-conducting microspheres is 8%, the particle size of the porous silica moisture-conducting microspheres is 60 nm, and the pore size of the porous silica moisture-conducting microspheres is 15 nm.

A method for preparing the one-way moisture-conducting, moisture-absorbing and quick-drying nonwoven material as described above, including the following steps:

(1) The hydrophilic polyester fiber is opened and mixed, carded into a web, and cross-laid to form a layer of fiber web, which is sent to the spunlace area of the rotary screen. It is pre-wetted first, and then undergoes four spunlaces for spunlace entanglement. The pressure is 3MPa, 3MPa, 5MPa, 6MPa respectively, and then sent to the bottom of the steel pipe in the flat mesh spunlace area with steel pipe support.

(2) The polyamide 6 fiber with special cross-section is opened, mixed and carded into a web to form a layer of parallel fiber web, which is sent to the flat mesh spunlace area with a steel pipe support above the steel pipe. After pre-wetting, it goes through four spunlaces and a circular mesh. The cross-fiber webs entangled in the spunlace area are subjected to composite hydroentanglement. The water pressures are 3MPa, 6MPa, 9MPa, and 12MPa respectively. In the steel pipe support part, the water needle rebounds after meeting the steel pipe, and the diameter of the steel pipe is formed in the middle of the two layers of fiber webs. Corresponding pore structure, and the part without steel pipe, the two layers of fiber mesh are tightly entangled to form one layer of fiber mesh, thus forming a pore structure non-woven material that is unidirectional, moisture-absorbing and quick-drying; the diameter of the steel pipe is 4mm, and the average arrangement interval is 10mm.

(3) During the spunlace process, the running speed of the fiber web is 80m/min, and porous silica moisture-conducting microspheres are continuously fed into the steel pipe at the same speed. In the spunlace area, due to the protective effect of the steel pipe, moisture conductivity The microspheres are not affected and exit the spunlace area from the outlet end of the steel pipe into the pore structure of the one-way moisture-absorbing and quick-drying spunlace nonwoven material. There is a round roller that gently presses the fiber web above the outlet end of the steel pipe before entering the drying room, which can maintain the pore structure in the fiber web and make the surface of the fiber web smooth.

(4) Send the wet unidirectional moisture-absorbing and quick-drying spunlace nonwoven material into a three-layer flat mesh drying room with a length of 4 meters for drying. The temperature of the lower layer is set to 102°C, the temperature of the middle layer is set to 108°C, and the temperature of the upper layer is set to 102°C. The temperature is set to 112°C, and the speed of drying hot air flow is 3m/s. Since there is no external force during the hot air drying process, the moisture is brought out of the wet one-way moisture-absorbing and quick-drying spunlace nonwoven material by the hot air, and the pore structure and shape of the material will not change. After winding, it forms a one-way moisture-absorbing and quick-drying spunlace nonwoven material.

Test example

1. Conduct performance tests on the products prepared in each of the above embodiments, and use 55g/ ^m2 PET/PA composite spunlace nonwoven material without cavity structure as a comparative example for testing and comparison. The basic properties are as shown in Table 1 .

Table 1 Basic performance test results of each embodiment

According to "GB/T21655.1 2008 Evaluation of Moisture Absorption and Quick Drying of Textiles Part 1: Single Combination Experiment Method", the moisture absorption and quick drying properties of the test samples and comparative examples are shown in Table 2.

Table 2 Hygroscopic and quick-drying performance test results of each embodiment

It can be seen from the test data in Table 1 and Table 2 that under the same quantitative conditions, the thickness, softness, and air permeability of the product after adding the cavity structure are increased, resulting in that its moisture absorption and quick-drying performance is also improved. Although the mechanical properties It has been reduced, but it can meet the usage requirements.

2. The permeability test results of Examples 2, 4, and 6 with the addition of porous silica moisture-conducting microspheres and the currently commercialized 40g/ ^m2 ES hot-air nonwoven flow-guiding layer are shown in Table 3.

Table 3 Permeability test results of embodiments adding porous silica moisture-conducting microspheres (hydrophobic layer upward)

It can be seen from the data in Table 3 that the permeability of the product after adding porous silica moisture-conducting microspheres is better than the currently commercialized ES hot air non-woven flow guide layer. It can replace the current flow guide layer and keep it in contact with the skin. The contact surface is dry.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the purpose of the present invention. Variety. In addition, the embodiments of the present invention and the features in the embodiments may be combined with each other without conflict.

Claims (10)

1. The method comprises the following steps ofThe unidirectional moisture-guiding, moisture-absorbing and quick-drying nonwoven material is characterized by comprising the following raw materials in percentage by mass: 30-70% of hydrophilic polyester fiber web and 70-30% of polyamide 6 fiber web with special-shaped cross section; the ration of the unidirectional moisture-conducting, moisture-absorbing and quick-drying non-woven material is 50-100 g/m ² The method comprises the steps of carrying out a first treatment on the surface of the The special-shaped section is at least one of a triangular section, a trilobal section or a cross star-shaped section; the unidirectional moisture-conducting, moisture-absorbing and quick-drying nonwoven material has a pore structure.

2. The unidirectional moisture-conducting, moisture-absorbing and quick-drying non-woven material according to claim 1, wherein the pore structure of the unidirectional moisture-conducting, moisture-absorbing and quick-drying non-woven material contains porous silica moisture-conducting microspheres, and the content of the porous silica moisture-conducting microspheres is 5-20%; and/or the particle size of the porous silica moisture-conducting microsphere is 50-200 nm; and/or the porous silica moisture-wicking microspheres have a pore size of about 15nm.

3. A method for preparing a unidirectional moisture-conducting, moisture-absorbing and quick-drying nonwoven material according to any one of claims 1-2, comprising the steps of:

(1) Carrying out cylinder water jet on the hydrophilic polyester fibers to obtain a hydrophilic polyester fiber net after water jet; the hydrophilic polyester fiber net after the hydroentanglement is sent to the lower part of a steel pipe in a flat net hydroentangled area of the steel pipe bracket;

(2) And (3) feeding the polyamide 6 fiber with the special-shaped cross section above the steel pipe in the flat net hydroentangled area, carrying out composite hydroentanglement with the hydroentangled hydrophilic polyester fiber net prepared in the step (1), and drying to obtain the unidirectional moisture-guiding, moisture-absorbing and quick-drying nonwoven material.

4. The method according to claim 3, wherein in the step (2), the step of carrying out the composite hydroentanglement further comprises a step of transporting porous silica moisture-conducting microspheres into the unidirectional moisture-conducting moisture-absorbing and quick-drying nonwoven material.

5. The method according to claim 4, wherein the steel tube support consists of steel tubes arranged in parallel in the web width direction, the axis of the steel tubes being parallel to the web output direction; the porous silica moisture-conducting microspheres are input into the steel pipe of the flat net water needling area through an input pipe, and then enter the unidirectional moisture-conducting moisture-absorbing quick-drying non-woven material from the other end of the steel pipe.

6. The method according to claim 3, wherein in the step (1), the basis weight of the hydrophilic polyester fiber web in the cylinder water jet area is 30-50 g/m ² 。

7. The process according to claim 3, wherein in the step (2), the basis weight of the polyamide 6 fiber web having a special-shaped cross section in the flat web hydroentangled zone is 20 to 50g/m ² 。

8. A production method according to claim 3, wherein the pitch of the steel pipes is 5 to 15mm and the diameter of the steel pipes is 3 to 5mm.

9. A nonwoven material production apparatus for carrying out the production method according to any one of claims 3 to 8, characterized by comprising an opening device, a carding device, a hydroentangling device, a drying device, a trimming device and a winding device, which are connected in this order; the spunlacing device comprises a cylinder spunlacing machine and a flat screen spunlacing machine, wherein the cylinder spunlacing machine is connected with the flat screen spunlacing machine; the flat net hydroentanglement machine is provided with a steel pipe support, the steel pipe support consists of steel pipes which are arranged in parallel in the width direction of the fiber web, and the axis of the steel pipe is parallel to the output direction of the fiber web.

10. Use of the unidirectional moisture-conducting, moisture-absorbing and quick-drying nonwoven material according to any one of claims 1-2 in disposable moisture-absorbing and quick-drying products.