CN114411295B - A superfine fiber/short fiber rotor composite yarn - Google Patents

Abstract

The invention relates to a superfine fiber/short fiber rotor composite yarn, which is integrally in a rotor yarn structure and consists of superfine fibers and short fibers, wherein the superfine fibers and the short fibers are compounded through mechanical entanglement and cohesion and thermal bonding; the yarn evenness variation coefficient of the superfine fiber/short fiber rotor composite yarn is less than or equal to 12.0%, the breaking strength is 13.0-30.0 cN/tex, the breaking strength variation coefficient is less than or equal to 8%, and the double-sided bending cycle number is more than 4000. The superfine fibers spun by a melt-blowing method are uniformly compounded in the rotor yarn, the superfine fibers are not easy to fall off, the composite yarn has good structural stability and durability, the mechanical property of the composite yarn is strong, and the subsequent processability is high; the superfine fiber/short fiber rotor composite yarn can be used for preparing textiles with better filtering performance and thermal insulation performance due to the fact that the superfine fibers are compounded, so that the superfine fiber/short fiber rotor composite yarn has higher added value.

Description

A superfine fiber/short fiber rotor composite yarn

technical field

The invention belongs to the technical field of textiles and relates to a superfine fiber/short fiber rotor composite yarn.

Background technique

In recent years, textiles with high added value have become more and more popular in the market. Among them, microfiber yarn has better functional effects such as heat insulation, warmth retention, adsorption, sound absorption and filtration because of its fluffy yarn structure and many pores, so it has higher added value and broad market prospects. At present, there are two main technical solutions for using ultra-fine fiber spinning. One is to form ultra-fine fibers into chemical fiber bundles and then spin them to make ultra-fine fiber yarns, but the ultra-fine fiber chemical fiber bundles are basically formed by ultra-fine fiber nets. , so the degree of orientation of the superfine fibers in the chemical fiber bundle is poor, so that the mechanical strength of the prepared superfine fiber yarn is also poor; the second is to compound the superfine fibers and chemical fiber filaments by mechanical entanglement or wrap the superfine fibers in chemical fiber filaments and yarn surface, but the microfibers in the microfiber composite yarn produced by this method are unevenly distributed and mostly adhere to the surface of the yarn, which affects the functional effect of the superfine fiber yarn. Weak mechanical properties are very easy to fall off during subsequent processing, so the stability and durability of the superfine fiber composite yarn spun by this method are poor, which affects the comprehensive performance of subsequent textiles.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide a superfine fiber/short fiber rotor composite yarn with uniform composite, stable structure, strong mechanical properties and processability.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A superfine fiber/short fiber rotor composite yarn, the superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole, which is composed of superfine fibers and short fibers, and the superfine fibers and short fibers are passed by adding The mechanical entanglement and cohesion produced by twisting and the thermal bonding caused by the residual temperature of ultrafine fibers are combined;

The ultrafine fiber has a diameter of 1-5 μm; the short fiber has a linear density of 1.0-5.0 dtex and a length of 10-50 mm.

As a preferred technical solution:

The ultrafine fiber/short fiber rotor composite yarn described above has a fineness of 10-100 tex and a twist of 50-150 twists/10cm.

According to the ultrafine fiber/short fiber rotor composite yarn as described above, the mass content of the ultrafine fiber in the ultrafine fiber/short fiber rotor composite yarn is 0.1-20.0 wt%.

According to the above-mentioned ultrafine fiber/short fiber rotor composite yarn, the ultrafine fiber is prepared by a melt blown spinning method.

As described above, a superfine fiber/short fiber rotor composite yarn, the raw material of the melt-blown spinning is polypropylene, polyester, polyamide, polylactic acid, polychlorotrifluoroethylene or polyamide ester.

A superfine fiber/short fiber rotor composite yarn as described above, the short fiber is cotton, linen, viscose, polyester or acrylic.

A superfine fiber/short fiber rotor composite yarn as described above, the superfine fiber/short fiber rotor composite yarn is made of the superfine fiber and the short fiber in the rotor of the rotor spinning device It is produced by internal mixing and coacervation followed by twisting into yarn.

A kind of superfine fiber/short fiber rotor composite yarn as mentioned above, the superfine fiber and short fiber in the superfine fiber/short fiber rotor composite yarn are evenly combined, the composite yarn has good evenness, and its evenness is even Coefficient of variation ≤ 12.0% (see "Textile Materials Experimental Technology" Chapter 10, Section 3 for test methods), and the composite yarn has strong mechanical properties and processability, stable yarn structure, and its breaking strength is 13.0-30.0cN /tex, the coefficient of variation of breaking strength ≤ 8% (see the second section of Chapter 12 of "Textile Material Experimental Technology" for test methods), and the durability of the composite yarn is good, and the number of double-sided bending cycles (see "Textile Materials Experimental Technology" for test methods) Material Science "Chapter XII Section IV) is more than 4000 times.

Principle of the present invention is as follows:

The superfine fiber/short fiber rotor composite yarn provided by the invention is realized by combining melt blown spinning technology and rotor spinning technology. The spinning parts of the melt-blown spinning box are embedded in the rotor spinner, so that the ultra-fine fibers prepared by melt-blown spinning can be directly mixed with the short fibers conveyed by the fiber delivery channel in the coagulation tank of the rotor, and in the rotor Under the action of high-speed rotation of the cup, it is twisted into yarn. Since the superfine fiber is twisted into yarn after being continuously mixed with the short fiber in the condensation tank, the superfine fiber will be randomly and evenly distributed in the rotor yarn body, and due to the twisting effect and the rotor spinning air-spun yarn Features, the formed rotor composite yarn is not easy to untwist, the superfine fiber is not easy to fall off, the structure stability of the rotor composite yarn is good, and the follow-up processability is strong. At the same time, due to the mechanical entanglement and cohesion between the short fibers in the rotor composite yarn, between the short fibers and the superfine fibers due to twisting, and the thermal bonding between the superfine fibers and between the superfine fibers and the short fibers , the rotor composite yarn of the present invention has strong mechanical properties. And, because the rotor composite yarn of the present invention only contains short fibers and superfine fibers, there are many pores in the rotor composite yarn, the specific surface area of the yarn body is large, and the yarn body structure is fluffy, so that the rotor composite yarn is Functions work better in subsequent uses.

Beneficial effect:

(1) A kind of superfine fiber/short fiber rotor composite yarn of the present invention, is that the superfine fiber spun by the melt-blown method is evenly compounded in the rotor yarn, the superfine fiber is not easy to fall off, the composite yarn The structural stability and durability are good, and the composite yarn has strong mechanical properties and high subsequent processability.

(2) The superfine fiber/short fiber rotor composite yarn of the present invention can be used to prepare textiles with better filtration performance and heat retention performance due to the composite superfine fiber, so it has higher added value.

(3) The superfine fiber type in a kind of ultrafine fiber/short fiber rotor composite yarn of the present invention can change with the high polymer raw material of melt blown spinning, so the prepared composite yarn has diversity, thus has more Strong practicality and high economic value.

(4) A superfine fiber/short fiber rotor composite yarn of the present invention can be realized by combining a melt-blown spinning box with a rotor spinning device, and the production process is short and the production efficiency is high.

Description of drawings

Fig. 1 is a structural schematic diagram of a superfine fiber/short fiber rotor composite yarn of the present invention, and the dotted line in the figure is the profile of the superfine fiber/short fiber rotor composite yarn;

Fig. 2 is a structural representation of a preparation device for superfine fiber/short fiber rotor composite yarn;

Fig. 3 is a schematic cross-sectional view of a preparation device for superfine fiber/short fiber rotor composite yarn (directly facing the exit direction of the fiber delivery channel);

Fig. 4 is a schematic diagram of a fiber transmission channel;

Fig. 5 is a schematic cross-sectional view of a preparation device for superfine fiber/short fiber rotor composite yarn (directly facing the direction of the melt-blown spinning box).

Among them, 1-microfiber; 2-short fiber; 3-rotor cup; 4-rotor spinning device cover; 5-fiber delivery channel; -screw extruder; 10-metering pump; 11-meltblown die head; 12-spinning hole; 13-hot air chamber; 14-hot air pipe; 15-cold air chamber.

Detailed ways

The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

A superfine fiber/short fiber rotor composite yarn is prepared by a superfine fiber/short fiber rotor composite yarn preparation device.

As shown in Figures 2 to 5, the preparation device for superfine fiber/short fiber rotor composite yarn includes a melt-blown spinning box and a rotor spinning device. The melt-blown spinning box is used for spinning superfine fibers, and the rotor spinning The yarn device is used to condense and mix superfine fibers and short fibers and twist them into yarns; the melt-blown spinning box includes a screw extruder 9, a metering pump 10, a melt-blown die head 11 with a spinneret hole 12, and two for The hot air chamber 13 and the hot air pipe 14 for hot drafting; the cross section of the spinneret hole 12 is circular, and the diameter of the spinneret hole is 0.1 mm; the number of spinneret holes 12 on the meltblown die head 11 is 3; The yarn device includes a rotor 3 embedded with a condensation groove 8 and a rotor spinning device cover 4; the rotor spinning device cover 4 has a fiber delivery channel 5, a false twist disc 6 and a yarn drawing tube 7; the yarn guiding tube 7 and the false twist disc 6 are respectively located on the upper and lower sides of the rotor spinning device cover 4, and the yarn drawing tube 7 passes through the rotor spinning device cover 4 and is connected with the false twisting disc 6, the false twisting disc 6, the yarn guiding tube 7 and the The center lines of the rotor 3 coincide with each other; the fiber delivery channel 5 obliquely passes through the upper and lower sides of the rotor spinning device cover 4, the outlet is located in the rotor 3, and the inlet is connected with the opening roller; the rotor spinning device cover There are also holes on the 4 that are adapted to the melt-blown die head 11 and the hot air pipe 14 in the melt-blown spinning box and run through the upper and lower sides of the rotor spinner cover 4; the spinneret holes 12 on the melt-blown die head 11 are located Inside the rotor cup 3 and facing the condensation groove 8; one end of the two hot air pipes 14 located inside the rotor cup 3 faces the microfibers ejected from the spinneret holes 12, and the other ends are respectively connected to a hot air chamber 13; the two hot air pipes The chamber 13 and the two hot air pipes 14 are distributed symmetrically with respect to the melt blown die head, the angle between the hot air pipe 14 and the melt blown die head 11 is 15°; the center line of the melt blown die head 11 and the center of the fiber delivery channel 5 The angle between the lines is 20°; the screw extruder 9 and the metering pump 10 are located on the side of the rotor spinner cover 4 facing away from the rotor 3, and the metering pump 10 is connected to the screw extruder 9 and the melt blown machine respectively. The die heads 11 are connected; the air inlet of the rotor spinning device is connected with a cold air chamber 15 .

The preparation process parameters are as follows:

The diameter of the rotor 3 is 40mm; the rotating speed of the rotating cup is 90000r/min; the negative pressure at the outlet of the rotating cup is -9000Pa; the rotating speed of the carding roller is 10000r/min; Both the pump input and output sections are equipped with pressure sensors, and the driving power is 1.5kW; the hot air chamber is equipped with a hot air heating system, including a blower and an air heater. 0.02ghm, the spinning speed is 500m/min.

As shown in Figure 1, the final superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole, and is composed of superfine fiber 1 and short fiber 2. The superfine fiber 1 is a polypropylene fiber with a diameter of 1 μm. Short fiber 2 is cotton fiber with a length of 25 mm and a linear density of 2.0 dtex; superfine fiber 1 and short fiber 2 are composited by mechanical entanglement and thermal bonding; the fineness of superfine fiber/short fiber rotor composite yarn The density is 10tex, and the twist is 150 twists/10cm; the yarn forming speed of the ultrafine fiber/short fiber rotor composite yarn is 60m/min; the mass content of ultrafine fiber in the ultrafine fiber/short fiber rotor composite yarn is 0.1wt %; The coefficient of variation of the evenness of the superfine fiber/short fiber rotor composite yarn is 11.9%, the breaking strength is 24.8cN/tex, the coefficient of variation of the breaking strength is 7.9%, and the number of double-sided bending cycles is 4250 times.

Example 2

A superfine fiber/short fiber rotor composite yarn is prepared by a superfine fiber/short fiber rotor composite yarn preparation device.

The preparation device for superfine fiber/short fiber rotor composite yarn includes a melt blown spinning box and a rotor spinning device, the melt blown spinning box is used for spinning superfine fibers, and the rotor spinning device is used for combining superfine fibers with The short fibers are condensed and mixed and twisted into yarn; the melt-blown spinning box includes a screw extruder 9, a metering pump 10, a melt-blown die head 11 with a spinneret hole 12, and two hot air chambers 13 for thermal drawing and The hot air pipe 14; the cross section of the spinneret hole 12 is circular, and the diameter of the spinneret hole is 0.1mm; the number of the spinneret hole 12 on the meltblown die head 11 is 6; the rotor spinning device includes an embedded condensation groove 8 The rotor 3 and the cover 4 of the rotor spinning device; the cover 4 of the rotor spinning device has a fiber delivery channel 5, a false twist disc 6 and a yarn drawing tube 7; the yarn guiding tube 7 and the false twisting disc 6 are respectively located at the rotating The upper and lower sides of the cup spinning device cover 4, and the yarn guiding tube 7 passes through the rotor spinning device cover 4 and is connected to the false twist disc 6, the center line of the false twisting disc 6, the yarn guiding tube 7 and the rotor 3 overlap; the fiber delivery channel 5 obliquely passes through the upper and lower sides of the rotor spinning device cover 4, its outlet is located in the rotor 3, and the inlet is connected with the carding roller; the rotor spinning device cover 4 also has a The melt blown die head 11 and the hot air pipe 14 in the spinning box run through the holes on the upper and lower sides of the rotor spinner cover 4; the spinneret holes 12 on the melt blown die head 11 are located in the rotor cup 3 and are facing the condensation Slot 8; one end of two hot air pipes 14 located inside the rotor cup 3 faces the microfiber ejected from the spinneret hole 12, and the other end is respectively connected with a hot air chamber 13; two hot air chambers 13 and two hot air pipes 14 are distributed symmetrically about the melt blown die head, the angle between the hot air pipe 14 and the melt blown die head 11 is 15°; the angle between the center line of the melt blown die head 11 and the center line of the fiber delivery channel 5 is 60° °; the screw extruder 9 and the metering pump 10 are located on the side of the rotor spinning device cover 4 facing away from the rotor 3, and the metering pump 10 is connected to the screw extruder 9 and the meltblown die head 11 respectively; The air inlet of the yarn device is connected with a cold air chamber 15 .

The preparation process parameters are as follows:

The diameter of the rotor 3 is 46mm; the rotating speed of the rotating cup is 80000r/min; the negative pressure at the outlet of the rotating cup is -8000Pa; the rotating speed of the carding roller is 9000r/min; Both the pump input and output sections are equipped with pressure sensors, and the driving power is 1.5kW; the hot air chamber is equipped with a hot air heating system, including a blower and an air heater. 0.02ghm, the spinning speed is 500m/min.

The final superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole and is composed of superfine fiber 1 and short fiber 2. The superfine fiber 1 is a polypropylene fiber with a diameter of 1 μm, and the short fiber 2 is a 25 mm long fiber. , cotton fiber with a linear density of 2.0dtex; superfine fiber 1 and short fiber 2 are composited by mechanical entanglement and thermal bonding; the fineness of superfine fiber/short fiber rotor composite yarn is 30tex, and the twist is 100 twists/10cm; the spinning speed of superfine fiber/short fiber rotor composite yarn is 80m/min; the mass content of superfine fiber in superfine fiber/short fiber rotor composite yarn is 5.0wt%; superfine fiber/ The coefficient of variation of the evenness of the short fiber rotor composite yarn is 11.5%, the breaking strength is 26.4cN/tex, the coefficient of variation of the breaking strength is 7.7%, and the number of double-sided bending cycles is 4330 times.

Example 3

A superfine fiber/short fiber rotor composite yarn is prepared by a superfine fiber/short fiber rotor composite yarn preparation device.

The preparation device for superfine fiber/short fiber rotor composite yarn includes a melt blown spinning box and a rotor spinning device, the melt blown spinning box is used for spinning superfine fibers, and the rotor spinning device is used for combining superfine fibers with The short fibers are condensed and mixed and twisted into yarn; the melt-blown spinning box includes a screw extruder 9, a metering pump 10, a melt-blown die head 11 with a spinneret hole 12, and two hot air chambers 13 for thermal drawing and The hot air pipe 14; the cross section of the spinneret hole 12 is circular, and the diameter of the spinneret hole is 0.3 mm; the number of the spinneret hole 12 on the meltblown die head 11 is 10; the rotor spinning device includes an embedded condensation groove 8 The rotor 3 and the cover 4 of the rotor spinning device; the cover 4 of the rotor spinning device has a fiber delivery channel 5, a false twist disc 6 and a yarn drawing tube 7; the yarn guiding tube 7 and the false twisting disc 6 are respectively located at the rotating The upper and lower sides of the cup spinning device cover 4, and the yarn guiding tube 7 passes through the rotor spinning device cover 4 and is connected to the false twist disc 6, the center line of the false twisting disc 6, the yarn guiding tube 7 and the rotor 3 overlap; the fiber delivery channel 5 obliquely passes through the upper and lower sides of the rotor spinning device cover 4, its outlet is located in the rotor 3, and the inlet is connected with the carding roller; the rotor spinning device cover 4 also has a The melt blown die head 11 and the hot air pipe 14 in the spinning box run through the holes on the upper and lower sides of the rotor spinner cover 4; the spinneret holes 12 on the melt blown die head 11 are located in the rotor cup 3 and are facing the condensation Slot 8; one end of two hot air pipes 14 located inside the rotor cup 3 faces the microfiber ejected from the spinneret hole 12, and the other end is respectively connected with a hot air chamber 13; two hot air chambers 13 and two hot air pipes 14 are distributed symmetrically about the melt blown die head, the angle between the hot air pipe 14 and the melt blown die head 11 is 45°; the angle between the center line of the melt blown die head 11 and the center line of the fiber delivery channel 5 is 90° °; the screw extruder 9 and the metering pump 10 are located on the side of the rotor spinning device cover 4 facing away from the rotor 3, and the metering pump 10 is connected to the screw extruder 9 and the meltblown die head 11 respectively; The air inlet of the yarn device is connected with a cold air chamber 15 .

The preparation process parameters are as follows:

The diameter of the rotor 3 is 52mm; the rotation speed of the rotor is 70000r/min; the negative pressure at the outlet of the rotor is -7000Pa; the rotation speed of the carding roller is 8000r/min; Both the pump input and output sections are equipped with pressure sensors, and the driving power is 1.5kW; the hot air chamber is equipped with a hot air heating system, including a blower and an air heater. 0.05ghm, the spinning speed is 1500m/min.

The final superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole and is composed of superfine fiber 1 and short fiber 2. The superfine fiber 1 is polyester fiber with a diameter of 5 μm, and the short fiber 2 is 35 mm in length. , viscose fiber with a linear density of 1.5dtex; superfine fiber 1 and short fiber 2 are composited by mechanical entanglement and thermal bonding; the fineness of superfine fiber/short fiber rotor composite yarn is 50tex, twist 70 twists/10cm; the yarn forming speed of ultrafine fiber/short fiber rotor composite yarn is 100m/min; the mass content of ultrafine fiber in ultrafine fiber/short fiber rotor composite yarn is 10.0wt%; ultrafine fiber The coefficient of variation of the evenness of the short-fiber rotor-cup composite yarn is 11.6%, the breaking strength is 27.1cN/tex, the coefficient of variation of the breaking strength is 7.2%, and the number of double-sided bending cycles is 4480 times.

Example 4

A superfine fiber/short fiber rotor composite yarn is prepared by a superfine fiber/short fiber rotor composite yarn preparation device.

The preparation device for superfine fiber/short fiber rotor composite yarn includes a melt blown spinning box and a rotor spinning device, the melt blown spinning box is used for spinning superfine fibers, and the rotor spinning device is used for combining superfine fibers with The short fibers are condensed and mixed and twisted into yarn; the melt-blown spinning box includes a screw extruder 9, a metering pump 10, a melt-blown die head 11 with a spinneret hole 12, and two hot air chambers 13 for thermal drawing and The hot air pipe 14; the cross section of the spinneret hole 12 is circular, and the diameter of the spinneret hole is 0.2 mm; the number of spinneret holes 12 on the meltblown die head 11 is 40; the rotor spinning device includes an embedded condensation groove 8 The rotor 3 and the cover 4 of the rotor spinning device; the cover 4 of the rotor spinning device has a fiber delivery channel 5, a false twist disc 6 and a yarn drawing tube 7; the yarn guiding tube 7 and the false twisting disc 6 are respectively located at the rotating The upper and lower sides of the cup spinning device cover 4, and the yarn guiding tube 7 passes through the rotor spinning device cover 4 and is connected to the false twist disc 6, the center line of the false twisting disc 6, the yarn guiding tube 7 and the rotor 3 overlap; the fiber delivery channel 5 obliquely passes through the upper and lower sides of the rotor spinning device cover 4, its outlet is located in the rotor 3, and the inlet is connected with the carding roller; the rotor spinning device cover 4 also has a The melt blown die head 11 and the hot air pipe 14 in the spinning box run through the holes on the upper and lower sides of the rotor spinner cover 4; the spinneret holes 12 on the melt blown die head 11 are located in the rotor cup 3 and are facing the condensation Slot 8; one end of two hot air pipes 14 located inside the rotor cup 3 faces the microfiber ejected from the spinneret hole 12, and the other end is respectively connected with a hot air chamber 13; two hot air chambers 13 and two hot air pipes 14 are distributed symmetrically about the melt blown die head, the angle between the hot air pipe 14 and the melt blown die head 11 is 30°; the angle between the center line of the melt blown die head 11 and the center line of the fiber delivery channel 5 is 120° °; the screw extruder 9 and the metering pump 10 are located on the side of the rotor spinning device cover 4 facing away from the rotor 3, and the metering pump 10 is connected to the screw extruder 9 and the meltblown die head 11 respectively; The air inlet of the yarn device is connected with a cold air chamber 15 .

The preparation process parameters are as follows:

The diameter of the rotor 3 is 56mm; the rotation speed of the rotor is 60000r/min; the negative pressure at the outlet of the rotor is -5000Pa; the rotation speed of the opening roller is 6000r/min; Both the pump input and output sections are equipped with pressure sensors, and the driving power is 1.5kW; the hot air chamber is equipped with a hot air heating system, including a blower and an air heater. 0.0315ghm, the spinning speed is 1000m/min.

The final superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole and is composed of superfine fiber 1 and short fiber 2. The superfine fiber 1 is a polyester fiber with a diameter of 3 μm, and the short fiber 2 is a 30 mm long fiber. , polyester fiber with a linear density of 2.5dtex; superfine fiber 1 and short fiber 2 are composited by mechanical entanglement and thermal bonding; the fineness of superfine fiber/short fiber rotor composite yarn is 70tex, and the twist is 50 twist/10cm; the yarn forming speed of superfine fiber/short fiber rotor composite yarn is 120m/min; the mass content of superfine fiber in superfine fiber/short fiber rotor composite yarn is 15.0wt%; superfine fiber/ The coefficient of variation of the evenness of the short fiber rotor composite yarn is 11.1%, the breaking strength is 28.5cN/tex, the coefficient of variation of the breaking strength is 6.1%, and the number of double-sided bending cycles is 4510 times.

Example 5

A superfine fiber/short fiber rotor composite yarn is prepared by a superfine fiber/short fiber rotor composite yarn preparation device.

The preparation device for superfine fiber/short fiber rotor composite yarn includes a melt blown spinning box and a rotor spinning device, the melt blown spinning box is used for spinning superfine fibers, and the rotor spinning device is used for combining superfine fibers with The short fibers are condensed and mixed and twisted into yarn; the melt-blown spinning box includes a screw extruder 9, a metering pump 10, a melt-blown die head 11 with a spinneret hole 12, and two hot air chambers 13 for thermal drawing and The hot air pipe 14; the cross section of the spinneret hole 12 is circular, and the diameter of the spinneret hole is 0.1 mm; the number of the spinneret hole 12 on the meltblown die head 11 is 50; the rotor spinning device includes an embedded condensation groove 8 The rotor 3 and the cover 4 of the rotor spinning device; the cover 4 of the rotor spinning device has a fiber delivery channel 5, a false twist disc 6 and a yarn drawing tube 7; the yarn guiding tube 7 and the false twisting disc 6 are respectively located at the rotating The upper and lower sides of the cup spinning device cover 4, and the yarn guiding tube 7 passes through the rotor spinning device cover 4 and is connected to the false twist disc 6, the center line of the false twisting disc 6, the yarn guiding tube 7 and the rotor 3 overlap; the fiber delivery channel 5 obliquely passes through the upper and lower sides of the rotor spinning device cover 4, its outlet is located in the rotor 3, and the inlet is connected with the carding roller; the rotor spinning device cover 4 also has a The melt blown die head 11 and the hot air pipe 14 in the spinning box run through the holes on the upper and lower sides of the rotor spinner cover 4; the spinneret holes 12 on the melt blown die head 11 are located in the rotor cup 3 and are facing the condensation Slot 8; one end of two hot air pipes 14 located inside the rotor cup 3 faces the microfiber ejected from the spinneret hole 12, and the other end is respectively connected with a hot air chamber 13; two hot air chambers 13 and two hot air pipes 14 are distributed symmetrically about the melt blown die head, the angle between the hot air pipe 14 and the melt blown die head 11 is 15°; the angle between the center line of the melt blown die head 11 and the center line of the fiber delivery channel 5 is 160 °; the screw extruder 9 and the metering pump 10 are located on the side of the rotor spinning device cover 4 facing away from the rotor 3, and the metering pump 10 is connected to the screw extruder 9 and the meltblown die head 11 respectively; The air inlet of the yarn device is connected with a cold air chamber 15 .

The preparation process parameters are as follows:

The diameter of the rotor 3 is 66mm; the rotating speed of the rotating cup is 25000r/min; the negative pressure at the outlet of the rotating cup is -3000Pa; the rotating speed of the carding roller is 4000r/min; Both the input and output sections of the pump are equipped with pressure sensors, and the driving power is 1.5kW; the hot air chamber is equipped with a hot air heating system, including a blower and an air heater. 0.02ghm, the spinning speed is 500m/min.

The final superfine fiber/short fiber rotor composite yarn has a rotor yarn structure as a whole and is composed of superfine fiber 1 and short fiber 2. The superfine fiber 1 is a polyamide fiber with a diameter of 1 μm, and the short fiber 2 is a 35 mm long fiber. , acrylic fiber with a linear density of 3.0dtex; superfine fiber 1 and short fiber 2 are composited by mechanical entanglement and thermal bonding; the fineness of superfine fiber/short fiber rotor composite yarn is 100tex, and the twist is 50 twist/10cm; the yarn forming speed of superfine fiber/short fiber rotor composite yarn is 50m/min; the mass content of superfine fiber in superfine fiber/short fiber rotor composite yarn is 20.0wt%; superfine fiber/ The coefficient of variation of evenness evenness of staple fiber rotor composite yarn is 10.8%, the breaking strength is 29.3cN/tex, the coefficient of variation of breaking strength is 6.4%, and the number of double-sided bending cycles is 4640 times.

Claims (6)

1. A superfine fiber/short fiber rotor composite yarn, characterized in that: the superfine fiber/short fiber rotor composite yarn is a rotor yarn structure as a whole, and is composed of superfine fibers and short fibers; The diameter of the ultrafine fiber is 1-5 μm; the linear density of the short fiber is 1.0-5.0 dtex, and the length is 10-50 mm; The coefficient of variation of the evenness of the superfine fiber/short fiber rotor composite yarn is ≤12.0%, the breaking strength is 13.0~30.0cN/tex, the coefficient of variation of the breaking strength is ≤8%, and the number of double-sided bending cycles is more than 4000 times ; The superfine fiber is obtained by spinning the spinning part of the melt-blown spinning box embedded in the rotor spinning device; the superfine fiber/short fiber rotor composite yarn is obtained by the superfine fiber and The short fibers conveyed by the fiber delivery channel are mixed and coagulated in the rotor of the rotor spinning device and then twisted into yarns; the superfine fibers and the short fibers are mechanically entangled by twisting. Combined with cohesion and thermal bonding due to the residual temperature of ultrafine fibers for compounding. 2. A kind of superfine fiber/short fiber rotor composite yarn according to claim 1, characterized in that, the fineness of the superfine fiber/short fiber rotor composite yarn is 10~100tex, and the twist is 50~ 150 twists/10cm. 3. A kind of ultrafine fiber/short fiber rotor composite yarn according to claim 1, characterized in that, the mass content of ultrafine fiber in the ultrafine fiber/short fiber rotor composite yarn is 0.1 ~ 20.0wt %. 4. A superfine fiber/short fiber rotor composite yarn according to claim 1, characterized in that the superfine fiber is prepared by a melt blown spinning method. 5. a kind of microfiber/short fiber rotor composite yarn according to claim 4, is characterized in that, the raw material of described melt blown spinning is polypropylene, polyester, polyamide, polylactic acid, polytrifluoro Vinyl chloride or polyesteramide. 6 . A superfine fiber/short fiber rotor composite yarn according to claim 1 , wherein the short fiber is cotton, flax, viscose, polyester or acrylic.

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