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CN114908478B - Light and thin flash evaporation polymer non-woven fabric - Google Patents

Light and thin flash evaporation polymer non-woven fabric Download PDF

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Publication number
CN114908478B
CN114908478B CN202110291349.5A CN202110291349A CN114908478B CN 114908478 B CN114908478 B CN 114908478B CN 202110291349 A CN202110291349 A CN 202110291349A CN 114908478 B CN114908478 B CN 114908478B
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polymer
flash
spinning
light
thin flash
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CN114908478A (en
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叶孔萌
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Jiangsu Qingyun New Materials Co ltd
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Jiangsu Qingyun New Materials Co ltd
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/11—Flash-spinning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The application relates to a light and thin flash evaporation polymer non-woven fabric, the retention rate of wet tensile strength is 0.70-0.85, the front smoothness is 180-250 seconds, and the gram weight is 35-45 g/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The application is prepared by flash evaporation process, and the raw material is polyethylene; the light and thin flash evaporation polymer non-woven fabric has good toughness and softness, and also has good retention rate of wet tensile strength, thereby being beneficial to prolonging the service life.

Description

Light and thin flash evaporation polymer non-woven fabric
[ field of technology ]
The application relates to the technical field of flash evaporation non-woven fabrics, in particular to a light and thin flash evaporation polymer non-woven fabric.
[ background Art ]
Flash spinning refers to a spinning process in which a high polymer solution is extruded at a high pressure above its solvent boiling point, and the solvent flash causes the polymer to cool and solidify to form fibers. Also known as solution flash spinning. It is required that the polymer and the solvent are not decomposed at a temperature not lower than the boiling point of the solvent, and the solvent is easily evaporated. The extruded solution trickles, causing the solvent to flash off when the pressure suddenly drops, solidifying the polymer into fibers. Flash spinning technology is currently known by DuPont in the United states alone, and the data in this area are rarely seen in other journals except for some patents in the U.S. patent library, so that the understanding of this area is less, however, flash spinning is widely favored by consumers because of the many unique properties of small fiber diameter, uniform texture, and high strength.
In order to make the flash spinning process smooth or to give a certain special property to the product, certain additives such as nucleating agents, stabilizers, antioxidants, swelling agents, dyes, pigments and the like are added to the spinning solution. Harris et al add pigments to polyethylene to give the flash-evaporated nonwoven sheet better printing properties. Functionalization is an important development direction of flash evaporation non-woven fabrics at present, and is also an important research point.
Chinese patent publication No. CN107849740a relates to a flash spinning process comprising the steps of: producing a spin-fluid comprising (a) 5 to 30wt% of a main spin-agent selected from the group consisting of methylene chloride, cis-1, 2-dichloroethylene and trans-1, 2-dichloroethylene, and (c) a co-spin-agent comprising 1H, 6H-perfluorohexane or 1H-perfluoroheptane, containing one or more polymer types. Flash spinning the dope into a region of lower pressure at a pressure greater than the autogenous pressure of the dope to form plexifilamentary film-fibril strands of the polymer. The co-spin agent is present in the spin fluid in an amount sufficient to form an azeotrope-like composition with the main spin agent in the presence of the one or more polymer types. The polymer may be selected from the group consisting of high density polyethylene, polypropylene, polybutene-1, polymethylpentene, polyvinylidene fluoride, poly (ethylene tetrafluoroethylene) and blends of the foregoing.
Chinese patent publication No. CN1729320B relates to a flash spinning solution and a flash spinning method using a linear hydrofluorocarbon co-solvent, a method of preparing plexifilamentary film-fibril strands of synthetic fiber-formed polyolefin comprising: spinning fluid; and flash spinning the spinning fluid at a pressure greater than the autogenous pressure of the spinning fluid to a region of lower pressure to form plexifilamentary film-fibril strands of the synthetic fiber-formed polyolefin. A spin fluid comprising (a) 5 to 30 weight percent of a synthetic fiber-forming polyolefin selected from the group consisting of polypropylene, polymethylpentene, polyvinylidene fluoride, copolymers of ethylene and tetrafluoroethylene, and copolymers of ethylene and chlorotrifluoroethylene, (b) a primary solvent selected from the group consisting of methylene chloride and 1, 2-dichloroethylene, and (c) a co-solvent selected from the group consisting of linear hydrofluorocarbons having (i) 3 to 4 carbon atoms, (ii) an atmospheric boiling point of 10 to 50 ℃ and (iii) a molecular weight of less than 219, the co-solvent being present in the spin fluid in an amount sufficient to raise the cloud point pressure of the spin fluid by at least 50 pounds per square inch.
Chinese patent publication No. CN100335687C relates to a flash spinning process, a spinning mixture and uses thereof, a flash spinning process comprising: (a) forming a spinning mixture comprising a spin agent and a polymer mixture, (b) pressurizing the spinning mixture to a first pressure above its autogenous pressure, and (c) extruding the spinning mixture through small orifices into a region at a pressure below the autogenous pressure of the spinning mixture at a temperature at which evaporation occurs upon exposure of the spin agent to form a flash spun structure; wherein the polymer mixture comprises 0 to 95wt% of a first polymer and 5 to 100wt% of a second polymer; wherein the first polymer is selected from the group consisting of a polyolefin, a copolymer thereof with an ethylenically unsaturated monomer, a polyester, and mixtures thereof; and wherein the second polymer is selected from the group consisting of a polyolefin, a copolymer thereof with an ethylenically unsaturated monomer, a polyester, and mixtures thereof, and the second polymer comprises from 1 to 25 mole percent of functional pendant groups. Wherein the polymer mixture comprises 70 to 95wt% of the first polymer and 30 to 5wt% of the second polymer; wherein the pendant group is a fluoroalkenyl group, an oxyethylene trimer, a perfluorovinyl ether, or a vinyl silane; the spinning mixture comprises a spinning agent selected from the group consisting of aliphatic hydrocarbons, fluorocarbons, halogenated hydrocarbons, and fluorohydrocarbons, and a polymer mixture.
Chinese patent publication No. CN1207145C relates to a composite sheet, a moisture vapor permeable, substantially liquid impermeable composite sheet comprising: a moisture vapor permeable monolithic polymer film having a first side and a second side, and a first nonwoven layer comprising a moisture vapor permeable powder adhesive bonded nonwoven layer, said powder adhesive bonded layer comprising a nonwoven fibrous web wherein greater than 95 weight percent of the fibers in the nonwoven web are compatible with said polymer film and the powder adhesive comprises a thermoplastic polymer that melts at the melting point temperature of the fibers and is compatible with the monolithic polymer film and at least 90 weight percent of the fiber components, said first nonwoven layer being bonded to the first side of the polymer film by extruding said film onto said first nonwoven layer. The second nonwoven layer is selected from the group consisting of spunbond, hydroentangled, stitch-bonded and flash spun entangled nonwoven fabrics.
Chinese patent publication No. CN1090260C relates to an improved flash spun sheet made up of continuous lengths of bonded, ultra-fine tufted filament bundles of polyolefin polymer and pigment, wherein the polyolefin comprises at least 90wt% of the bundles and the pigment comprises 0.05 to 10wt% of the bundles, the sheet having: less than 85g/m 2 Is a base weight of (2); a delamination strength of at least 60N/m; and its opacity is: at least 95% when the delamination strength of the sheet is less than 120N/m, and at least 90% when the delamination strength of the sheet is between 120N/m and 150N/m, and further at least 80% when the delamination strength is greater than 150N/m. Wherein the polyolefin polymer is selected from the group consisting of polyethylene, polypropylene and copolymers consisting essentially of ethylene and propylene units.
Chinese patent publication No. CN1023496C relates to a process for preparing polyethylene plexifilamentary film-fibril which comprises mixing and flash spinning at a temperature in the range of 100 to 250 ℃ to form a polyethylene plexifilamentary film-fibril, wherein the spinning mixture consists of an organic solvent, polyethylene and water, which is flash spun into a region of practically lower temperature and pressure at a pressure higher than the autogenous pressure of the spinning mixture, the improvement being that the water content is 0.5% of the organic solvent to equal to the saturation limit of water in said solvent, and the polyethylene content is 5 to 25% of the polyethylene and organic solvent.
When the flash evaporation polymer non-woven fabric is used as an outdoor article, particularly under outdoor humid environment conditions, the flash evaporation polymer non-woven fabric is necessarily required to have good retention rate of wet tensile strength so as to prolong the service life of the product; meanwhile, the flash evaporation polymer non-woven fabric must have proper smoothness, and is favorable for having better fabric hand feeling, softness and good printing performance. The present application therefore designs the product from the two application pain points described above; so as to improve the application range of the product and prolong the service life of the product.
[ application ]
The application aims to overcome the defects of the prior art and provides a light and thin flash evaporation polymer non-woven fabric.
The aim of the application is realized by the following technical scheme:
a light and thin flash evaporation polymer non-woven fabric with wet tensile strength retention rate of 0.70-0.85 and gram weight of 35-45 g/m 2 ；
Under standard atmospheric conditions, the tensile strength of the same sample before and after wetting is respectively measured, and the retention rate of wet tensile strength is the ratio of the tensile strength after wetting to the tensile strength before wetting; the wet-out process conditions of the test sample are as follows: the water temperature for soaking is 40 ℃, the soaking time is 8 hours, the constant-speed stretching speed is 50 mm/min, and the relative humidity of the environment is 48-52% RH during testing.
The soaking process water temperature of the sample is selected to be 40 ℃, and the final use scene temperature of the sample is mainly considered, so that the sample can be more fit with the actual environment temperature, and the service life of the sample in the actual state can be conveniently tested, and therefore, the temperature condition of 40 ℃ is selected instead of other temperature conditions.
The retention rate of wet tensile strength of the light and thin flash evaporation polymer non-woven fabric is 0.70-0.75.
The retention rate of wet tensile strength of the light and thin flash evaporation polymer non-woven fabric is 0.75-0.80.
The retention rate of wet tensile strength of the light and thin flash evaporation polymer non-woven fabric is 0.80-0.85.
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 180-250 seconds.
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 180-200 seconds.
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 200-220 seconds.
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 220-250 seconds.
The back smoothness of the light and thin flash evaporation polymer non-woven fabric is 75-90 seconds.
The back smoothness of the light and thin flash evaporation polymer non-woven fabric is 75-80 seconds.
The back smoothness of the light and thin flash evaporation polymer non-woven fabric is 80-85 seconds.
The back smoothness of the light and thin flash evaporation polymer non-woven fabric is 85-90 seconds.
The bending length of the light and thin flash evaporation polymer non-woven fabric is 5-8 cm.
The bending length of the light and thin flash evaporation polymer non-woven fabric is 5-6 cm.
The bending length of the light and thin flash evaporation polymer non-woven fabric is 6-7 cm.
The bending length of the light and thin flash evaporation polymer non-woven fabric is 7-8 cm.
The physical properties of the light and thin flash evaporation polymer non-woven fabric are mainly affected by spinning raw materials (polymer and spinning solvent), spinning technology (spinning temperature and spinning pressure), tow setting (winding relation among fibers) and layer number, and the post-treatment technology comprises a hot pressing technology. The processing method is designed mainly through the spinning solvent and the hot pressing process, and the scheme can solve 2 application pain points existing at present so as to achieve the purpose of improving the product performance, thereby expanding the application of the product and prolonging the service life of the product. The application searches a dynamic balance among the retention rate, smoothness and bending length of wet tensile strength, namely searches an optimal parameter range, so as to achieve the aim of solving 2 application pain points in the prior art.
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 14.5-16.5%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer comprises polyethylene.
2. Flash spinning
And then carrying out flash spinning at 180-225 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 100-130 ℃ and a linear pressure of 5-15N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
When the hot-pressing temperature is too high, the surface of the polymer non-woven fabric is in a plasticizing state, and fibers are tightly adhered, so that the retention rate of wet tensile strength is increased, the smoothness is increased, and the flexibility is poor when the bending length is reduced. When the hot-press temperature of hot-press forming is too low, the hot-press temperature is insufficient, the bonding between fibers is less, a flat product is not obtained, and the surface is rough; the wet tensile strength retention is reduced, the smoothness is reduced, and the flexibility is improved as the bending length is increased.
When the line pressure is too high, the surface of the polymer non-woven fabric is in a plasticizing state, and the fibers are tightly adhered, so that the retention rate of wet tensile strength is increased, the smoothness is increased, and the flexibility is poor when the bending length is reduced. When the line pressure of the hot press molding is too low, the hot press temperature is insufficient, the bonding between fibers is less, a flat product is not obtained, and the surface is rough; the wet tensile strength retention is reduced, the smoothness is reduced, and the flexibility is improved as the bending length is increased.
The printing performance of the fabric is closely related to the smoothness of the fabric surface, and in general, the smoother the less advantageous the printing is, because too smooth the inking performance is deteriorated. So that a proper smoothness must be chosen to obtain a fabric with a good printing result.
Compared with the prior art, the application has the following positive effects:
the light and thin flash evaporation polymer non-woven fabric has good toughness and softness, and also has good retention rate of wet tensile strength, thereby being beneficial to prolonging the service life.
[ description of the drawings ]
Fig. 1 is an SEM image of the light and thin type flash evaporation polymer nonwoven fabric of example 2.
[ detailed description ] of the application
The following provides specific embodiments of a lightweight and thin flash-spun polymer nonwoven fabric according to the present application.
Detailed description of the performance test:
1. test of wet tensile Strength retention
Principle of wet tensile strength retention: samples of the specified dimensions were soaked in water for a specified time under specified conditions and then stretched at constant speed to break on a tensile strength tester, and tensile force was recorded.
Wet tensile strength the test specimens are now soaked in distilled or deionized water and the maximum tensile force, i.e. the ratio of the maximum tensile force to the width, in N/m, that the wet test specimens are subjected to before breaking, per unit width.
Wet tensile retention was: the tensile strength of the same test specimen before and after wetting was measured separately under standard atmospheric conditions, and the wet tensile strength retention was the ratio of the tensile strength after wetting to the tensile strength before wetting. The wet-out process conditions of the test sample are as follows: the water temperature for soaking is 40 ℃, the soaking time is 8 hours, the constant-speed stretching speed is 50 mm/min, and the relative humidity of the environment is 48-52% RH during testing.
The wet tensile strength was measured with reference to national standard GB/T24328.4-2009, 10 samples were taken, 5 of which were used for testing to obtain values, and the 5 values were then averaged to obtain the wet tensile strength in the transverse direction. The 5 machine direction samples were tested for values and then the 5 values were averaged to obtain wet machine direction tensile strength (generally defaulting to the machine direction of the sample). And finally, averaging the wet transverse tensile strength and the wet longitudinal tensile strength to obtain the wet tensile strength of the sample.
2. Smoothness test
Smoothness testing principle: the time required for the atmosphere to let in a certain amount of air between the sample surface and the annular plate surface is expressed in seconds under a certain contact state and pressure difference. The smoothness testing principle is as follows: the paper is placed on a glass plate and a partial vacuum is created by applying a specified pressure to draw in air and pass the air over the contact surface, and the time required for the vacuum to change within a specified range is measured.
The smoothness testing method comprises the following steps: sampling and measuring according to national standard GB/T456-2002, wherein the paper and paperboard smoothness is measured (the other gram method), the size of a sample is 60 mm by 60 mm, 10 samples are taken for testing the same sample, 5 samples are used for testing the front surface for five times, 5 samples are used for testing the back surface for five times, smoother definition is set as the front surface, and the other surface is set as the back surface; and then, the values of the front measured smoothness and the back measured smoothness are averaged to obtain the front smoothness and the back smoothness of the sample.
3. Bending length
The bending length of the fabric is one of characteristic indexes for representing the bending deformation resistance of the fabric, reflects one of investigation indexes of the stiffness degree, namely the softness degree of the fabric, and a method for measuring the stiffness of the fabric at home and abroad is generally an inclined plane method. Sampling tests were carried out by means of a bending length meter according to GB/T18318-2001 (determination of the bending length of textile fabrics) according to this national standard, the specific detailed test procedure being described internationally, a brief description of which is given here: the sample is made into 10 samples, the long sides of the 5 samples are parallel to the transverse direction of the fabric, and the long sides of the 5 samples are parallel to the longitudinal direction of the fabric (generally defaulting to the production and processing direction of the sample is the longitudinal direction); the bending length of the sample is obtained by dividing the sample into two groups for testing and averaging the tested values of each sample.
Example 1
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution was 14.5%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 180 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 100 ℃ and a linear pressure of 5N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Example 2
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 190 ℃ to obtain flash-spun fibers, carrying out hot-press molding by a roller at 105 ℃ and a linear pressure of 7N/mm to obtain the light and thin flash-spun polymer non-woven fabric, wherein an SEM (scanning electron microscope) graph of the non-woven fabric is shown in figure 1, gaps exist between adjacent fibers, and the adjacent fibers are in an irregular winding state.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Example 3
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot press molding by a roller at the hot press temperature of 110 ℃ and the linear pressure of 10N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Example 4
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 16%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 205 ℃ to obtain flash-spun fibers, and carrying out hot press molding by a roller at 115 ℃ and a linear pressure of 13N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Example 5
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution was 16.5%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 225 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 130 ℃ and a linear pressure of 15N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 1
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at the hot-press temperature of 135 ℃ and the linear pressure of 10N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 2
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at the hot-press temperature of 145 ℃ and the linear pressure of 10N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 3
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller, wherein the hot-press temperature is 95 ℃ and the linear pressure is 10N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 4
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at the hot-press temperature of 85 ℃ and the linear pressure of 10N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 5
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 200 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 110 ℃ and a linear pressure of 18N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 6
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot press molding by a roller at the hot press temperature of 110 ℃ and the linear pressure of 20N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 7
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at the spinning temperature of 200 ℃ to obtain flash-spun fibers, and carrying out hot press molding by a roller at the hot press temperature of 110 ℃ and the linear pressure of 3N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 8
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 170 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 110 ℃ and a linear pressure of 3N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 9
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 15%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 160 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 110 ℃ and a linear pressure of 3N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 9
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 20%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 160 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 110 ℃ and a linear pressure of 3N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Comparative example 10
A processing method of a light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent.
The mass fraction of the polymer in the spinning solution is 12%.
The solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1.
The polymer is polyethylene.
2. Flash spinning
And then carrying out flash spinning at 160 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 110 ℃ and a linear pressure of 3N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
The light and thin flash evaporation polymer non-woven fabrics were subjected to performance test, and the tested performance parameters are wet tensile strength retention, smoothness and bending length, as shown in table 1.
Table 1 performance test tables for examples and comparative examples
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present application, and are intended to be within the scope of the present application.

Claims (15)

1. A light and thin flash evaporation polymer non-woven fabric with wet tensile strength retention rate of 0.70-0.85 and gram weight of 35-45 g/m 2 ；
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 180-250 seconds;
under standard atmospheric conditions, the tensile strength of the same sample before and after wetting is respectively measured, and the retention rate of wet tensile strength is the ratio of the tensile strength after wetting to the tensile strength before wetting; the wet-out process conditions of the test sample are as follows: the water temperature of soaking is 40 ℃, and the soaking time is 8 hours;
the bending length of the light and thin flash evaporation polymer non-woven fabric is 5-8 cm;
the processing method of the light and thin flash evaporation polymer non-woven fabric comprises the following steps:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent;
the mass fraction of the polymer in the spinning solution is 14.5-16.5%;
the solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1;
the polymer comprises polyethylene;
2. flash spinning
And then carrying out flash spinning at 180-225 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 100-130 ℃ and a linear pressure of 5-15N/mm to obtain the light and thin flash-spun polymer non-woven fabric.
2. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a wet tensile strength retention of 0.70 to 0.75.
3. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a wet tensile strength retention of 0.75 to 0.80.
4. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a wet tensile strength retention of 0.80 to 0.85.
5. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a frontal smoothness of 180-200 seconds.
6. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a frontal smoothness of 200-220 seconds.
7. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a frontal smoothness of 220-250 seconds.
8. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a backside smoothness of 75-90 seconds.
9. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a backside smoothness of 75-80 seconds.
10. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a backside smoothness of 80-85 seconds.
11. The lightweight and thin flash-spun polymer nonwoven fabric of claim 1 having a backside smoothness of 85-90 seconds.
12. The lightweight and thin flash evaporation polymer nonwoven fabric as claimed in claim 1, wherein the bending length of the lightweight and thin flash evaporation polymer nonwoven fabric is 5-6 cm.
13. The lightweight and thin flash evaporation polymer nonwoven fabric as claimed in claim 1, wherein the bending length of the lightweight and thin flash evaporation polymer nonwoven fabric is 6-7 cm.
14. The lightweight and thin flash evaporation polymer nonwoven fabric as claimed in claim 1, wherein the bending length of the lightweight and thin flash evaporation polymer nonwoven fabric is 7-8 cm.
15. The processing method of the light and thin flash evaporation polymer non-woven fabric is characterized by comprising the following steps of:
1. preparing spinning solution
The spinning solution comprises a polymer and a spinning solvent;
the mass fraction of the polymer in the spinning solution is 14.5-16.5%;
the solvent is 1H-perfluoroheptane and 1, 3-pentafluorobutane, and the volume ratio of the two is 2:1;
the polymer comprises polyethylene;
2. flash spinning
Then carrying out flash spinning at 180-225 ℃ to obtain flash-spun fibers, and carrying out hot-press molding by a roller at 100-130 ℃ and a linear pressure of 5-15N/mm to obtain the light and thin flash-spun polymer non-woven fabric;
the retention rate of wet tensile strength of the light and thin flash evaporation polymer non-woven fabric is 0.70-0.85, and the gram weight is 35-45 g/m 2 ；
The front smoothness of the light and thin flash evaporation polymer non-woven fabric is 180-250 seconds;
under standard atmospheric conditions, the tensile strength of the same sample before and after wetting is respectively measured, and the retention rate of wet tensile strength is the ratio of the tensile strength after wetting to the tensile strength before wetting; the wet-out process conditions of the test sample are as follows: the water temperature of soaking is 40 ℃, and the soaking time is 8 hours;
the bending length of the light and thin flash evaporation polymer non-woven fabric is 5-8 cm.
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EP0357364A2 (en) * 1988-08-30 1990-03-07 E.I. Du Pont De Nemours And Company A process for flash-spinning dry polymeric plexifilamentary film-fibril strands
CN1051596A (en) * 1989-08-22 1991-05-22 纳慕尔杜邦公司 The technology of preparation polyethylene plexifilamentary film-bibril strands
JPH06101151A (en) * 1992-09-16 1994-04-12 Asahi Chem Ind Co Ltd Sheet for printing
US5958187A (en) * 1994-03-18 1999-09-28 Fort James Corporation Prewettable high softness paper product having temporary wet strength
CN1249791A (en) * 1997-03-05 2000-04-05 纳幕尔杜邦公司 Improved flash-spun sheet material
CN1572853A (en) * 2003-05-28 2005-02-02 气体产品聚合物公司 Nonwoven binders with high wet/dry tensile strength ratio
CN105887540A (en) * 2014-11-15 2016-08-24 玖龙浆纸（乐山）有限公司 Process method for producing carbon-free copying base paper by using white scrap paper
CN108930193A (en) * 2018-08-08 2018-12-04 东莞市白天鹅纸业有限公司 A kind of wet paper towel and its manufacturing method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0357364A2 (en) * 1988-08-30 1990-03-07 E.I. Du Pont De Nemours And Company A process for flash-spinning dry polymeric plexifilamentary film-fibril strands
CN1051596A (en) * 1989-08-22 1991-05-22 纳慕尔杜邦公司 The technology of preparation polyethylene plexifilamentary film-bibril strands
JPH06101151A (en) * 1992-09-16 1994-04-12 Asahi Chem Ind Co Ltd Sheet for printing
US5958187A (en) * 1994-03-18 1999-09-28 Fort James Corporation Prewettable high softness paper product having temporary wet strength
CN1249791A (en) * 1997-03-05 2000-04-05 纳幕尔杜邦公司 Improved flash-spun sheet material
CN1572853A (en) * 2003-05-28 2005-02-02 气体产品聚合物公司 Nonwoven binders with high wet/dry tensile strength ratio
CN105887540A (en) * 2014-11-15 2016-08-24 玖龙浆纸（乐山）有限公司 Process method for producing carbon-free copying base paper by using white scrap paper
CN108930193A (en) * 2018-08-08 2018-12-04 东莞市白天鹅纸业有限公司 A kind of wet paper towel and its manufacturing method

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