A thin sheet material prepared by the flash spinning method

Abstract

The present invention relates to a thin sheet material prepared by the flash spinning method, the raw material of which contains polyethylene, the dynamic friction coefficient is 0.07 to 0.20; the wet tensile strength is 3000 to 4000 N / m; the wet tensile strength retention rate is 0.80 to 0.90. The thin sheet material of the present application has a better dynamic friction coefficient and wet tensile strength, and thus has a wide range of application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of flash spinning, and specifically, to a thin sheet material prepared by the flash spinning method.

Background Art

[0002] Flash spinning is a process where a polymer is dissolved in a certain solvent to form a spinning solution, which is then ejected through a spinneret hole. Due to the rapid evaporation of the solvent, the polymer re-solidifies into fibers, and these fibers are adsorbed onto a forming screen to directly form a fiber web. Flash-spun polyethylene nonwoven fabrics have many excellent properties, such as excellent waterproofness, extremely high strength of the sheet, resistance to tearing, puncture, and rupture; the sheet generally does not fuzz or generate dust; and it has excellent performance within a wide temperature range. Therefore, flash-spun polyethylene nonwoven fabrics are widely used in packaging materials, protective clothing, covering fabrics, and printing substrates. Flash spinning was accidentally discovered by DuPont scientists, and then continuously studied and developed, thus monopolizing the entire nonwoven fabric technology. Since the development of this technology to the present, only Asahi Kasei has developed similar products and then suddenly stopped research and development. Currently, DuPont has carried out a large number of patent layouts on flash technology, forming a patent barrier and setting a patent threshold for later entrants. Since around 1960, DuPont has approximately 220 patent clusters related to flash spinning. Among them, since the establishment of the patent system in China, many patents have been laid out in China, indicating that DuPont attaches great importance to the Chinese market. Here are some Chinese patents briefly listed to illustrate the main technical protection points of DuPont's patents.

[0003] Chinese Patent Publication No. CN1379830A relates to a thin sheet material prepared by flash spinning. Its independent claim is for a polyethylene multi-filament fiber yarn having a surface area less than 10 m 2 / g and an extrusion value of at least 1 mm / g.

[0004] Chinese Patent Publication No. CN1881041A relates to a diffusive reflection article including a light diffuser located within a structure defining an optical resonator. Its main independent claim is that the diffuser comprises a nonwoven thin sheet having a large number of pores, and the specific pore volume of pores with an average pore diameter of 0.01 - 1.0 micrometers measured by the mercury porosimetry method is at least about 34 cm 3 / m 2 . The dependent claim is that the nonwoven thin sheet comprises a large number of ultrafine multi-filament film fibrils, and the fibrils comprise a porous polymer.

[0005] Chinese Patent Publication No. CN103533996A relates to a nonwoven sheet. Its independent claim is that the nonwoven sheet comprises polymer fibers, and the nonwoven sheet has at least 10 ml / min / cm 2a water flow rate of / KPa and a bending filtration coefficient of at least 3.0, and wherein the nonwoven sheet is a nonwoven sheet uniaxially stretched in the longitudinal direction.

[0006] Chinese Patent Publication No. CN104969381A relates to a separator medium for an electrochemical cell, and its independent claim is that the separator medium includes at least one nonwoven sheet, the nonwoven sheet contains polymer fibers, wherein the nonwoven sheet has a surface area of 0.5 to 1.5 m 2 / g, and the separator retains at least 70% of its longitudinal (MD) tensile strength relative to the unsulfonated medium.

[0007] Chinese Patent Publication No. CN111389288A relates to a method and device for dissolving a polymer into a solvent. The present invention relates to a method and device for dissolving a polymer into a solvent, particularly to a method and device for dissolving a polymer into a solvent during solution spinning, which can achieve uniform dissolution of the polymer in the solvent, enabling the molten polymer and the solvent to be emulsified quickly and efficiently, thereby quickly dissolving the molten polymer. The present invention provides a method for uniformly dissolving a polymer into a solution, including two-stage series dissolution sections: the first-stage section, providing stirring with shear force to the heterogeneous mixture of the polymer and the solvent to break and disperse the polymer in the dissolution; the second-stage section, mixing the broken polymer and the solvent evenly. By using this method or device of the present application, it is possible to efficiently dissolve the polymer in the spinning solvent, making the discharged spinning solution more uniform, which is beneficial to stable spinning; reducing the material contact time, reducing the equipment volume, thereby reducing the material holding amount and the risk value of the pressure vessel; reducing the residence time of the material at high temperature, thereby reducing the decomposition probability and improving the product quality; reducing the amount of pollutants generated by the high-temperature decomposition of the material, reducing the harm to the environment and the corrosion of the equipment.

[0008] Currently, patents in the existing flash spinning field generally focus on the improvement of spinning solvents or spinning equipment, and do not involve the improvement of relevant wet tensile strength performance. In view of the obvious technical problem that the wet tensile strength of the thin sheet material prepared by the existing flash spinning method decreases under humid conditions, the present application improves the product performance through the improvement of raw materials and processes, thereby expanding the scope of use of the product.

Summary of the Invention

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a thin sheet material prepared by the flash spinning method.

[0010] The purpose of the present invention is achieved by the following technical solutions:

[0011] A thin sheet material prepared by the flash spinning method, characterized in that its raw materials contain polyethylene, and its dynamic friction coefficient is 0.07 to 0.20; its wet tensile strength is 3000 to 4000 N / m; its wet tensile strength retention rate is 0.80 to 0.90;

[0012] Under standard atmospheric conditions, the wet tensile strength is the tensile strength of the sample after being soaked. Among them, the soaking process conditions of the sample are: first, the water temperature for soaking is 45 °C, and the soaking time is 24 hours; second, the temperature is raised to 65 °C, and the soaking time is 24 hours;

[0013] The wet tensile strength retention rate is the ratio of the tensile strength of the same sample after soaking to the tensile strength before soaking.

[0014] The dynamic friction coefficient of the thin sheet material is 0.07 to 0.08.

[0015] The dynamic friction coefficient of the thin sheet material is 0.08 to 0.12.

[0016] The dynamic friction coefficient of the thin sheet material is 0.12 to 0.15.

[0017] The dynamic friction coefficient of the thin sheet material is 0.15 to 0.20.

[0018] The wet tensile strength of the thin sheet material is 3000 to 3200 N / m.

[0019] The wet tensile strength of the thin sheet material is 3200 to 3400 N / m.

[0020] The wet tensile strength of the thin sheet material is 3400 to 3600 N / m.

[0021] The wet tensile strength of the thin sheet material is 3600 to 3800 N / m.

[0022] The wet tensile strength of the thin sheet material is 3800 to 4000 N / m.

[0023] The wet tensile strength retention rate of the thin sheet material is 0.80 to 0.84.

[0024] The wet tensile strength retention rate of the thin sheet material is 0.84 to 0.87.

[0025] The wet tensile strength retention rate of the thin sheet material is 0.87 to 0.90.

[0026] The grammage of the thin sheet material is 48 to 75 g / m 2 ;

[0027] A thin sheet material prepared by the flash spinning method, and its raw materials further contain compound chlorinated polyethylene.

[0028] The composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0029] A production method of a thin sheet material prepared by the flash spinning method, which specifically includes the following steps:

[0030] (1) Prepare the spinning solution

[0031] The spinning solution contains a polymer and a spinning solvent.

[0032] The mass fraction of the polymer in the spinning solution is 8-16%.

[0033] The polymer contains polyethylene and composite chlorinated polyethylene.

[0034] The mass fraction of the composite chlorinated polyethylene in the mixture of polyethylene and composite chlorinated polyethylene is 1-2%.

[0035] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0036] The described spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0037] The preparation method of the composite chlorinated polyethylene specifically includes the following steps:

[0038] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and perform heat treatment at 105-110 °C for 0.3-1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene to the barium chloride solution by microwave stirring to obtain the elastomeric chlorinated polyethylene-barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene-barium sulfate composite to the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene-barium sulfate composite to obtain the composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0039] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 10-35%.

[0040] The mass fraction of concentrated sulfuric acid is 80%.

[0041] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.07-1:0.14.

[0042] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0043] The sulfonic acid groups of elastomeric chlorinated polyethylene after sulfonation have a strong chelating effect with barium ions, and finally barium sulfate precipitates are formed on the surface of elastomeric chlorinated polyethylene. At the same time, through the chelating effect, it plays a role of fixation rather than simple physical mixing; the chlorine-containing groups in elastomeric chlorinated polyethylene can chelate with silver ions of silver nitrate to form ionic silver chloride, and its silver ions have excellent antibacterial effects and form a sustained-release function through adsorption. The addition of inorganic particles adsorbed by elastomeric chlorinated polyethylene improves its printing performance. Being too rough or too smooth is not conducive to subsequent printing processes, so it is necessary to select a suitable range of dynamic friction coefficients. Due to having a functional group structure similar to polyethylene, and at the same time having saturated molecular chains and randomly distributed polar chlorine atoms, elastomeric chlorinated polyethylene has heat resistance, ozone resistance, weather resistance, and aging resistance; it can improve the service life of products; it can improve the technical problem of insufficient brittleness of pure polyethylene, enhance the wet tensile strength, and further enhance the wet tensile strength retention rate. However, it does not always increase as the amount of composite chlorinated polyethylene added increases. There will be a plateau and it will no longer increase, so it is necessary to select a suitable range of addition amounts. Finally, since elastomeric chlorinated polyethylene is easily soluble in organic solvents, which is the same as the spinning solvent of the applied flash spinning process, this is also an important consideration factor for our selection of elastomeric chlorinated polyethylene; it is necessary to consider the compatibility between the added substance and the spinning solvent and spinning raw materials.

[0044] (2) Flash spinning process

[0045] Then flash spinning is carried out at a spinning temperature of 180 - 218 °C to obtain flash spun fibers, which are then hot-pressed and formed by a roller, and then calendered and formed. The calendering temperature is 112 - 122 °C, and the line pressure of calendering is 8 - 33 N / mm. Finally, winding and reeling are carried out to obtain a sheet material.

[0046] Compared with the prior art, the positive effects of the present invention are:

[0047] In view of the obvious technical problem that the wet tensile strength of the sheet material prepared by the existing flash spinning method decreases under humid conditions, through the improvement of raw materials and processes, the performance of the product is improved, thereby expanding the scope of use of the product.

Specific embodiments

[0048] The following provides specific embodiments of a sheet material prepared by a flash spinning method of the present invention.

[0049] Performance testing:

[0050] (1) Dynamic friction coefficient

[0051] Friction is the resistance generated when the surface of one material slides on the surface of another material.

[0052] Dynamic friction refers to the resistance to keep one surface of a material sliding on the surface of another material.

[0053] The coefficient of dynamic friction is the ratio of the dynamic frictional force acting perpendicularly on two surfaces in a friction test.

[0054] For specific testing, refer to GB / T 22895-2008 Determination of Static and Dynamic Coefficient of Friction of Paper and Board. Take 10 samples, among which 5 samples are parallel to the processing direction of the fabric and the other 5 samples are perpendicular to the price direction of the samples, and conduct tests respectively, then calculate the average to obtain the coefficient of dynamic friction. The coefficient of dynamic friction in this test is the average force value (unit: N) required to maintain a sliding distance of 40 - 60 mm during the third sliding for a sample with unit weight.

[0055] (2) Wet tensile strength retention rate

[0056] Specific reference to the national standard is GBT 24328.4-2009 Tissue Paper and Its Products - Part 4: Determination of Wet Tensile Strength;

[0057] Under standard atmospheric conditions, determine the tensile strength of the same sample after soaking. Among them, the soaking process conditions of the sample are: first, the water temperature for soaking is 45°C and the soaking time is 24 hours; second, heat up to 65°C and the soaking time is 24 hours.

[0058] The wet tensile strength retention rate is the ratio of the tensile strength of the same sample after soaking to the tensile strength before soaking.

[0059] During the test, the constant speed stretching rate is 50 mm / minute, and the relative humidity of the test environment is 48 - 52%RH;

[0060] For the samples in this application, the water temperature for the soaking process is selected as 45°C and the soaking time is 24 hours; then heat up to 65°C and soak for another 24 hours. The test conditions in this application are different from the conventional test conditions (national standard GBT 24328.4 test) and are relatively more stringent. We designed a soaking cycle process here, mainly considering the values of the wet tensile strength of the product at 45 - 65°C to simulate the actual use environment of the product, to investigate the service life of the product, and then to improve the design of raw materials and processes to ultimately improve the performance of the product.

[0061] (3) Antibacterial performance

[0062] The test of the antibacterial rate (bacteriostatic rate) refers to the national standard GB / T 20944.2-2007, Textiles - Evaluation of antibacterial properties - Part 2: Absorption method. The bacterial strain is Escherichia coli. Three samples are taken for testing respectively, and then the average value is calculated to obtain the antibacterial rate (i.e., the bacteriostatic rate). Generally speaking, an antibacterial rate greater than 95% indicates antibacterial properties, and greater than 98% indicates better antibacterial properties.

[0063] Example 1

[0064] A production method of a thin sheet material prepared by flash spinning, which specifically comprises the following steps:

[0065] (1) Prepare the spinning solution

[0066] The spinning solution contains a polymer and a spinning solvent.

[0067] The mass fraction of the polymer in the spinning solution is 10%.

[0068] The polymer contains polyethylene and composite chlorinated polyethylene.

[0069] The mass fraction of the composite chlorinated polyethylene in the mixture of polyethylene and composite chlorinated polyethylene is 1%.

[0070] The spinning solvent is one or a combination of several of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0071] The spinning solvent described is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0072] The preparation method of the composite chlorinated polyethylene specifically comprises the following steps:

[0073] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by means of microwave stirring to obtain the elastomeric chlorinated polyethylene - barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene - barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene - barium sulfate complex to obtain the composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0074] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 10%.

[0075] The mass ratio of the initially compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.07.

[0076] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0077] (2) Flash spinning process

[0078] Then, flash spinning is carried out at a spinning temperature of 200 °C to obtain flash-spun fibers. Then, hot pressing and forming are carried out through rollers, and then calendering and forming are carried out at a calendering temperature of 112 °C and a linear pressure of 8 N / mm. Finally, winding and reeling are carried out to obtain a thin sheet material. Finally, performance tests are carried out on the thin sheet material, and the testing methods are the same as above. The test data are shown in Table 1.

[0079] Example 2

[0080] A production method of a thin sheet material prepared by flash spinning, which specifically includes the following steps:

[0081] (1) Prepare the spinning solution

[0082] The spinning solution contains a polymer and a spinning solvent.

[0083] The mass fraction of the polymer in the spinning solution is 11%.

[0084] The polymer contains polyethylene and compound chlorinated polyethylene.

[0085] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 1.5%.

[0086] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0087] The spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0088] The preparation method of the compound chlorinated polyethylene specifically includes the following steps:

[0089] (1) First, disperse elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene - barium sulfate composite into silver nitrate solution so that silver ions are adsorbed on the elastomeric chlorinated polyethylene - barium sulfate composite to obtain compound chlorinated polyethylene; The compound chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0090] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 23%.

[0091] The mass fraction of concentrated sulfuric acid is 80%.

[0092] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0093] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0094] (2) Flash spinning process

[0095] Then conduct flash spinning, with the spinning temperature being 212 °C to obtain flash - spun fibers, then conduct hot - pressing forming through rollers, and then conduct calendering forming, with the calendering temperature being 117 °C and the linear pressure of calendering being 18 N / mm. Finally, conduct winding and rewinding to obtain a sheet material. Finally, conduct performance testing on the sheet material, and the testing method is the same as above, and the test data are shown in Table 1.

[0096] In addition, conduct hot - air aging treatment on the product of Example 2. The specific process is as follows: horizontally place the specimen in an oven at 80 °C for 168 hours; take it out and let it stand at 23 °C for 24 hours, and then test the change in the antibacterial rate after hot - air aging. The antibacterial rate E against Escherichia coli is 98.2%. It can be seen that after hot - air aging treatment, its antibacterial performance does not decrease significantly and has excellent antibacterial effects.

[0097] Example 3

[0098] A production method of a sheet material prepared by flash spinning, which specifically includes the following steps:

[0099] (1) Prepare the spinning solution

[0100] The spinning solution contains a polymer and a spinning solvent.

[0101] The mass fraction of the polymer in the spinning solution is 12%.

[0102] The polymer contains polyethylene and compound chlorinated polyethylene.

[0103] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 2%.

[0104] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0105] The spinning solvent described is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0106] The preparation method of the compound chlorinated polyethylene, the specific steps are as follows:

[0107] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by means of microwave stirring to obtain the elastomeric chlorinated polyethylene - barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene - barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene - barium sulfate complex to obtain the compound chlorinated polyethylene; the compound chlorinated polyethylene is a complex doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0108] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 35%.

[0109] The mass fraction of concentrated sulfuric acid is 80%.

[0110] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.14.

[0111] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0112] (2) Flash spinning process

[0113] Then carry out flash spinning, the spinning temperature is 218 °C to obtain flash fibers, then carry out hot pressing and forming through rollers, and then carry out calendering and forming, the calendering temperature is 122 °C, the linear pressure of calendering is 33 N / mm, and finally carry out winding and winding up to obtain a sheet material. Finally, perform performance testing on the sheet material, and the testing method is the same as above, and the test data are shown in Table 1.

[0114] Comparative Example 1

[0115] A production method of a thin sheet material prepared by flash spinning, which comprises the following specific steps:

[0116] (1) Prepare the spinning solution

[0117] The spinning solution contains a polymer and a spinning solvent.

[0118] The mass fraction of the polymer in the spinning solution is 11%.

[0119] The polymer contains polyethylene and compound chlorinated polyethylene.

[0120] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 1.5%.

[0121] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0122] The spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0123] The preparation method of the compound chlorinated polyethylene, the specific steps are as follows:

[0124] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105-110°C for 0.3-1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by microwave stirring to obtain an elastomeric chlorinated polyethylene-barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene-barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene-barium sulfate complex to obtain the compound chlorinated polyethylene; the compound chlorinated polyethylene is a complex doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0125] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 23%.

[0126] The mass fraction of the concentrated sulfuric acid is 80%.

[0127] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0128] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0129] (2) Flash spinning process

[0130] Then, flash spinning is carried out at a spinning temperature of 212 °C to obtain flash fibers, which are then hot-pressed and formed by a roller, and then calendered at a calendering temperature of 100 °C and a linear pressure of 3 N / mm. Finally, winding and rewinding are carried out to obtain a sheet material. Finally, the performance of the sheet material is tested, and the testing method is the same as above, and the test data are shown in Table 1.

[0131] Comparative Example 2

[0132] A production method of a sheet material prepared by flash spinning, which specifically comprises the steps of:

[0133] (1) Prepare a spinning solution

[0134] The spinning solution contains a polymer and a spinning solvent.

[0135] The mass fraction of the polymer in the spinning solution is 11%.

[0136] The polymer contains polyethylene and composite chlorinated polyethylene.

[0137] The mass fraction of the composite chlorinated polyethylene in the mixture of polyethylene and composite chlorinated polyethylene is 1.5%.

[0138] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0139] The spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0140] The preparation method of the composite chlorinated polyethylene specifically comprises the steps of:

[0141] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and carry out heat treatment at 105-110 °C for 0.3-1 hour, and then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by microwave stirring to obtain the elastomeric chlorinated polyethylene-barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene-barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene-barium sulfate complex to obtain the composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0142] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 23%.

[0143] The mass fraction of the concentrated sulfuric acid is 80%.

[0144] The mass ratio of the initially compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0145] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0146] (2) Flash spinning process

[0147] Then, flash spinning is carried out at a spinning temperature of 212 °C to obtain flash-spun fibers. Then, hot pressing and forming are carried out through rollers, and then calendering and forming are carried out at a calendering temperature of 105 °C and a linear pressure of 6 N / mm for calendering. Finally, winding and rewinding are carried out to obtain a sheet material. Finally, performance tests are carried out on the sheet material, and the testing methods are the same as above. The test data are shown in Table 1.

[0148] Comparative Example 3

[0149] A production method of a sheet material prepared by flash spinning, which includes the following specific steps:

[0150] (1) Prepare the spinning solution

[0151] The spinning solution contains a polymer and a spinning solvent.

[0152] The mass fraction of the polymer in the spinning solution is 11%.

[0153] The polymer contains polyethylene and compound chlorinated polyethylene.

[0154] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 1.5%.

[0155] The spinning solvent is one or a combination of several of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0156] The spinning solvent described is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0157] The preparation method of the compound chlorinated polyethylene, the specific steps are as follows:

[0158] (1) First, disperse elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene - barium sulfate composite into silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene - barium sulfate composite, obtaining composite chlorinated polyethylene; The composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide with elastomeric chlorinated polyethylene as the matrix.

[0159] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 23%.

[0160] The mass fraction of concentrated sulfuric acid is 80%.

[0161] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0162] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0163] (2) Flash spinning process

[0164] Then, conduct flash spinning. The spinning temperature is 212 °C to obtain flash spun fibers, followed by hot pressing and forming through roller wheels, and then calendering and forming. The calendering temperature is 141 °C, and the linear pressure of calendering is 37 N / mm. Finally, wind and roll up to obtain a sheet material. Finally, conduct performance testing on the sheet material. The testing method is the same as above, and the test data are shown in Table 1.

[0165] Comparative Example 4

[0166] A production method of a sheet material prepared by flash spinning, which specifically includes the following steps:

[0167] (1) Prepare the spinning solution

[0168] The spinning solution contains a polymer and a spinning solvent.

[0169] The mass fraction of the polymer in the spinning solution is 11%.

[0170] The polymer contains polyethylene and composite chlorinated polyethylene.

[0171] The mass fraction of composite chlorinated polyethylene in the mixture of polyethylene and composite chlorinated polyethylene is 1.5%.

[0172] The spinning solvent is one or a combination of several of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0173] The spinning solvent described is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, with the volume ratio of the three being 4:4:1.

[0174] A preparation method of composite chlorinated polyethylene, and its specific steps are as follows:

[0175] (1) First, disperse elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain preliminarily composite elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily composite elastomeric chlorinated polyethylene to a barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene - barium sulfate composite to a silver nitrate solution so that silver ions are adsorbed on the elastomeric chlorinated polyethylene - barium sulfate composite to obtain composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide with elastomeric chlorinated polyethylene as the matrix.

[0176] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 23%.

[0177] The mass fraction of concentrated sulfuric acid is 80%.

[0178] The mass ratio of the preliminarily composite elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0179] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0180] (2) Flash spinning process

[0181] Then carry out flash spinning, with the spinning temperature being 212 °C to obtain flash fibers, then conduct hot pressing and forming through rollers, and then through calendering and forming, with the calendering temperature being 145 °C and the linear pressure of calendering being 41 N / mm. Finally, carry out winding and coiling to obtain a sheet material. Finally, the surface of the sheet material is severely plasticized and is no longer suitable for testing.

[0182] Comparative example 5

[0183] A production method of a sheet material prepared by flash spinning, which includes the following specific steps:

[0184] (1) Prepare the spinning solution

[0185] The spinning solution contains a polymer and a spinning solvent.

[0186] The mass fraction of the polymer in the spinning solution is 11%.

[0187] The polymer contains polyethylene and composite chlorinated polyethylene.

[0188] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and the compound chlorinated polyethylene is 1.5%.

[0189] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0190] The described spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0191] The preparation method of the compound chlorinated polyethylene, and its specific steps are as follows:

[0192] Mix the elastomeric chlorinated polyethylene, barium sulfate, and silver oxide to obtain the compound chlorinated polyethylene;

[0193] The mass ratio of the elastomeric chlorinated polyethylene to barium sulfate is 1:0.11.

[0194] The mass ratio of barium sulfate to silver oxide is 1:1.

[0195] (2) Flash spinning process

[0196] Then carry out flash spinning. The spinning temperature is 212 °C to obtain flash fibers, and then carry out hot pressing forming by roller wheels, and then carry out calendering forming. The calendering temperature is 117 °C, and the linear pressure of calendering is 18 N / mm. Finally, carry out winding and winding to obtain a sheet material. Finally, carry out performance testing on the sheet material, and the testing method is the same as above, and the testing data are shown in Table 1.

[0197] In addition, carry out hot air aging treatment on the product of Comparative Example 5. The specific process is as follows: Place the specimen horizontally in an oven at 80 °C for 168 hours; take it out and let it stand at 23 °C for 24 hours, and then test the change in the antibacterial rate after hot air aging. The antibacterial rate against Escherichia coli is 83.2%. It can be seen that after the hot air aging treatment, its antibacterial performance significantly decreases, and its antibacterial performance decreases by more than 10%, which belongs to a significant decrease.

[0198] Comparative Example 6

[0199] A production method of a sheet material prepared by flash spinning, which includes the following specific steps:

[0200] (1) Prepare the spinning solution

[0201] The spinning solution contains a polymer and a spinning solvent.

[0202] The mass fraction of the polymer in the spinning solution is 11%.

[0203] The polymer contains polyethylene and compound chlorinated polyethylene.

[0204] The mass fraction of the composite chlorinated polyethylene in the mixture of polyethylene and the composite chlorinated polyethylene is 0.4%.

[0205] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0206] The spinning solvent described above is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0207] A preparation method of the composite chlorinated polyethylene, and its specific steps are as follows:

[0208] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain the preliminarily composite elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily composite elastomeric chlorinated polyethylene into the barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene - barium sulfate composite into the silver nitrate solution to make silver ions adsorbed on the elastomeric chlorinated polyethylene - barium sulfate composite, and obtain the composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0209] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 23%.

[0210] The mass fraction of the concentrated sulfuric acid is 80%.

[0211] The mass ratio of the preliminarily composite elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0212] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0213] (2) Flash spinning process

[0214] Then, conduct flash spinning. The spinning temperature is 212 °C to obtain flash-spun fibers, then conduct hot pressing and forming through a roller, and then conduct calendering and forming. The calendering temperature is 117 °C, and the linear pressure of calendering is 18 N / mm. Finally, conduct winding and winding up to obtain a sheet material. Finally, conduct performance testing on the sheet material, and the testing method is the same as above, and the testing data are shown in Table 1.

[0215] Comparative Example 7

[0216] A production method of a sheet material prepared by flash spinning, which includes the following specific steps:

[0217] (1) Prepare the spinning solution

[0218] The spinning solution contains a polymer and a spinning solvent.

[0219] The mass fraction of the polymer in the spinning solution is 11%.

[0220] The polymer contains polyethylene and compound chlorinated polyethylene.

[0221] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 0.8%.

[0222] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0223] The spinning solvent described above is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0224] Preparation method of the compound chlorinated polyethylene, the specific steps are as follows:

[0225] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene - barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene - barium sulfate complex to obtain the compound chlorinated polyethylene; the compound chlorinated polyethylene is a complex doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0226] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 23%.

[0227] The mass fraction of the concentrated sulfuric acid is 80%.

[0228] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0229] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0230] (2) Flash spinning process

[0231] Then, flash spinning is carried out at a spinning temperature of 212 °C to obtain flash fibers. Then, hot pressing and forming are carried out through a roller, and then calendering and forming are carried out at a calendering temperature of 117 °C and a linear pressure of 18 N / mm for calendering. Finally, winding and coiling are carried out to obtain a sheet material. Finally, performance testing is carried out on the sheet material, and the testing method is the same as above, and the test data are shown in Table 1.

[0232] Comparative Example 8

[0233] A production method of a sheet material prepared by flash spinning, which specifically comprises the following steps:

[0234] (1) Prepare a spinning solution

[0235] The spinning solution contains a polymer and a spinning solvent.

[0236] The mass fraction of the polymer in the spinning solution is 11%.

[0237] The polymer contains polyethylene and compound chlorinated polyethylene.

[0238] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 2.4%.

[0239] The spinning solvent is one or a combination of several of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0240] The spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0241] The preparation method of the compound chlorinated polyethylene specifically comprises the following steps:

[0242] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and carry out heat treatment at 105-110 °C for 0.3-1 hour, then filter and dry to obtain the preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into the barium chloride solution by microwave stirring to obtain the elastomeric chlorinated polyethylene-barium sulfate complex; (3) Add the elastomeric chlorinated polyethylene-barium sulfate complex into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene-barium sulfate complex to obtain the compound chlorinated polyethylene; the compound chlorinated polyethylene is a complex doped with barium sulfate and silver oxide based on the elastomeric chlorinated polyethylene.

[0243] The mass fraction of the chlorinated polyethylene in the concentrated sulfuric acid is 23%.

[0244] The mass fraction of the concentrated sulfuric acid is 80%.

[0245] The mass ratio of the initially compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0246] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0247] (2) Flash spinning process

[0248] Then, flash spinning is carried out at a spinning temperature of 212 °C to obtain flash-spun fibers. Then, hot pressing and forming are carried out through rollers, and then calendering and forming are carried out at a calendering temperature of 117 °C and a linear pressure of 18 N / mm. Finally, winding and reeling are carried out to obtain a sheet material. Finally, performance testing is carried out on the sheet material, and the testing method is the same as above, and the test data are shown in Table 1.

[0249] Comparative example 9

[0250] A production method of a sheet material prepared by flash spinning, which specifically comprises the following steps:

[0251] (1) Prepare the spinning solution

[0252] The spinning solution contains a polymer and a spinning solvent.

[0253] The mass fraction of the polymer in the spinning solution is 11%.

[0254] The polymer contains polyethylene and compound chlorinated polyethylene.

[0255] The mass fraction of the compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 2.8%.

[0256] The spinning solvent is one or a combination of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0257] The spinning solvent is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane, and benzene, and the volume ratio of the three is 4:4:1.

[0258] The preparation method of the compound chlorinated polyethylene specifically comprises the following steps:

[0259] (1) First, disperse elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105 - 110 °C for 0.3 - 1 hour, then filter and dry to obtain preliminarily compounded elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily compounded elastomeric chlorinated polyethylene into barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene - barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene - barium sulfate composite into silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene - barium sulfate composite, obtaining compound chlorinated polyethylene; The compound chlorinated polyethylene is a composite doped with barium sulfate and silver oxide with elastomeric chlorinated polyethylene as the matrix.

[0260] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 23%.

[0261] The mass fraction of concentrated sulfuric acid is 80%.

[0262] The mass ratio of the preliminarily compounded elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0263] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0264] (2) Flash spinning process

[0265] Then conduct flash spinning. The spinning temperature is 212 °C to obtain flash spun fibers, then conduct hot pressing and forming through rollers, and then conduct calendering and forming. The calendering temperature is 117 °C, and the linear pressure of calendering is 18 N / mm. Finally, conduct winding and winding up to obtain a sheet material. Finally, conduct performance testing on the sheet material. The testing method is the same as above, and the test data are shown in Table 1.

[0266] Comparative example 9

[0267] A production method of a sheet material prepared by flash spinning, which specifically includes the following steps:

[0268] (1) Prepare the spinning solution

[0269] The spinning solution contains a polymer and a spinning solvent.

[0270] The mass fraction of the polymer in the spinning solution is 11%.

[0271] The polymer contains polyethylene and compound chlorinated polyethylene.

[0272] The mass fraction of compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 3.2%.

[0273] The spinning solvent is one or a combination of several of unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, nitriles, amides, and fluorocarbons.

[0274] The spinning solvent described above is a mixture of 1,1-dichloro-2,2-difluoroethane, 1,1,1,3,3-pentafluoropropane and benzene, and the volume ratio of the three is 4:4:1.

[0275] The preparation method of the composite chlorinated polyethylene specifically comprises the following steps:

[0276] (1) First, disperse the elastomeric chlorinated polyethylene in concentrated sulfuric acid and conduct heat treatment at 105-110°C for 0.3-1 hour, then filter and dry to obtain the preliminarily composite elastomeric chlorinated polyethylene; (2) Secondly, add the preliminarily composite elastomeric chlorinated polyethylene into the barium chloride solution by means of microwave stirring to obtain an elastomeric chlorinated polyethylene-barium sulfate composite; (3) Add the elastomeric chlorinated polyethylene-barium sulfate composite into the silver nitrate solution to adsorb silver ions on the elastomeric chlorinated polyethylene-barium sulfate composite to obtain the composite chlorinated polyethylene; the composite chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene.

[0277] The mass fraction of chlorinated polyethylene in concentrated sulfuric acid is 23%.

[0278] The mass fraction of concentrated sulfuric acid is 80%.

[0279] The mass ratio of the preliminarily composite elastomeric chlorinated polyethylene to barium chloride in the barium chloride solution is 1:0.11.

[0280] The mass ratio of barium chloride in the barium chloride solution to silver nitrate in the silver nitrate solution is 1:1.

[0281] (2) Flash spinning process

[0282] Then, carry out flash spinning. The spinning temperature is 212°C to obtain flash fibers, and then carry out hot pressing and forming through rollers, and then carry out calendering and forming. The calendering temperature is 117°C, and the linear pressure of calendering is 18 N / mm. Finally, carry out winding and winding up to obtain a sheet material. Finally, carry out performance testing on the sheet material. The testing method is the same as above, and the test data are shown in Table 1.

[0283] Table 1

[0284]

[0285] The above is only the preferred implementation mode of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A thin sheet material prepared by flash spinning method, characterized in that, its raw materials include polyethylene, with a dynamic friction coefficient of 0.07 - 0.20; wet tensile strength of 3000 - 4000 N / m; wet tensile strength retention rate of 0.80 - 0.90; Under standard atmospheric conditions, the wet tensile strength is the tensile strength of the sample after being soaked. Among them, the soaking process conditions of the sample are: first, the water temperature for soaking is 45 °C, and the soaking time is 24 hours; second, the temperature is raised to 65 °C, and the soaking time is 24 hours; The wet tensile strength retention rate is the ratio of the tensile strength of the same sample after soaking to the tensile strength before soaking; The raw materials of the said thin sheet material also include compound chlorinated polyethylene; Compound chlorinated polyethylene is a composite doped with barium sulfate and silver oxide based on elastomeric chlorinated polyethylene; The production method of the thin sheet material prepared by the said flash spinning method, which specifically includes the following steps: (1) Prepare the spinning solution The spinning solution includes polymer and spinning solvent; The mass fraction of the polymer in the spinning solution is 8 - 16%; The polymer includes polyethylene and compound chlorinated polyethylene; The mass fraction of compound chlorinated polyethylene in the mixture of polyethylene and compound chlorinated polyethylene is 1 - 2%; (2) Flash spinning process Then carry out flash evaporation spinning, the spinning temperature is 180 - 218 °C to obtain flash evaporation fibers, then through hot pressing and forming by rollers, and then through calendering and forming, the calendering temperature is 112 - 122 °C, the linear pressure of calendering is 8 - 33 N / mm, and finally winding and rewinding are carried out to obtain the thin sheet material.

2. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the dynamic friction coefficient of the thin sheet material is 0.07 - 0.

08.

3. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the dynamic friction coefficient of the thin sheet material is 0.08 - 0.

12.

4. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the dynamic friction coefficient of the thin sheet material is 0.12 - 0.

15.

5. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the wet tensile strength of the thin sheet material is 3200 - 3400 N / m.

6. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the wet tensile strength of the thin sheet material is 3400 - 3600 N / m.

7. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the wet tensile strength of the thin sheet material is 3600 - 3800 N / m.

8. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the wet tensile strength retention rate of the thin sheet material is 0.80 - 0.

84.

9. A thin sheet material prepared by flash spinning method as described in claim 1, characterized in that, the wet tensile strength retention rate of the thin sheet material is 0.84 - 0.87.

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