Puncture-resistant flash evaporation medical protective sheet and application thereof

Abstract

The invention relates to a puncture-resistant flash medical protective sheet, which is characterized in that the raw material of the flash medical protective sheet comprises polyethylene, and the gram weight of the flash medical protective sheet is greater than 40g / m < 2 >; the penetration degree of the flash evaporation medical protective sheet is 0.3 to 3 (KN.s) / mm; the penetration degree is equal to puncture strength * ventilation resistance; the invention discloses a method for testing the puncture resistance of a plastic film and a thin sheet according to the puncture strength test standard GB / T 37841-2019. The test standard of the air permeability resistance is GBT 458-2008 measurement of the air permeability of paper and paperboards, and the air permeability resistance is used for measuring the time for passing 100 ml of air. The medical flash evaporation protective sheet has the advantages of better puncture resistance and air permeability.

Description

[Technical Field]

[0001] This invention relates to the field of textile production technology, specifically to a puncture-resistant flash-evaporation medical protective sheet and its application. [Background Technology]

[0002] Flash-evaporated medical protective sheets are nonwoven fabrics made using advanced flash evaporation technology, exhibiting significant medical protective properties. These sheets are produced through a specific flash evaporation process, which rapidly transforms a polymer solution into ultrafine fibers under high temperature and pressure, forming a highly dense fiber web structure. This material has been widely used in the field of medical protection, such as in protective suits, masks, and surgical gowns.

[0003] Advantages of flash-evaporated medical protective sheets:

[0004] (1) High-efficiency protection: It can effectively block the penetration of harmful substances such as viruses, bacteria, blood, and body fluids, providing reliable protection for medical staff.

[0005] (2) Good breathability: While ensuring the protective effect, it has good breathability, which improves the comfort of the wearer.

[0006] (3) High durability: After special treatment, it has high wear resistance and tensile strength, and can withstand multiple washing and disinfection.

[0007] (4) High production efficiency: Flash evaporation process has a fast production speed and high output, which is conducive to meeting the needs of large-scale production.

[0008] Specific application scenarios for flash-evaporated medical protective sheets:

[0009] (1) Medical protective clothing: used to protect medical staff from pathogen infection and reduce the risk of cross-infection.

[0010] (2) Medical masks: As the core material of medical surgical masks and N95 masks, they provide highly effective protection.

[0011] (3) Surgical gowns: Used by medical staff in the operating room to prevent the penetration of blood and body fluids during surgery.

[0012] (4) Other medical supplies: such as medical sheets, pillowcases, etc., to provide a clean and hygienic medical environment.

[0013] In summary, flash-evaporated medical protective sheets play a vital role in the medical protection field due to their superior protective performance, good breathability, and durability. With technological advancements and changing market demands, flash-evaporated medical protective sheets are expected to find applications and development in more areas in the future. However, currently, despite the high breathability of the flash-evaporated material itself, the poor performance of flash-evaporated medical protective sheets when exposed to sharp objects frequently leads to contamination of medical devices. Therefore, there is an urgent need to improve the puncture resistance of flash-evaporated medical protective sheets.

[0014] Chinese Patent Publication No. CN118065056 relates to the field of flash-evaporated polyethylene materials technology, and particularly to a flexurally resistant nonwoven fabric and its preparation method. This application addresses the problem of poor flexural resistance in existing flash-evaporated polyethylene products by providing a flexurally resistant nonwoven fabric and its preparation method, comprising polyethylene, wherein the flexural rating of the nonwoven fabric is 5 or higher, and the oxygen permeability coefficient of the nonwoven fabric is 3*10⁻⁶. 5 ~6*10 5 cm3 / (m*24h*0.1MPa). In the preparation process of this application, materials such as methyl vinyl silicone rubber are first mixed and compounded to form a flexurally resistant composite additive. The flexurally resistant composite additive is then mixed with a portion of polyethylene resin to obtain a flexurally resistant masterbatch, which is then applied to the flash spinning process. This significantly improves the flexural resistance of the obtained flash polyethylene material and reduces its oxygen permeability. This flash polyethylene material with high flexural resistance and low oxygen permeability can be well used as a medical protective material.

[0015] Chinese Patent Publication No. CN117926503 relates to the field of flash textile technology, specifically a high-flexibility flash sheet. This invention addresses the lack of existing research on modifying the flexibility and heat shielding of flash-spun fabrics, providing a high-flexibility flash sheet comprising polyethylene. The high-flexibility flash sheet has a flexibility strength of 1.8–4.0 N², a heat shielding rate of 10–40%, and is tested according to ASTM D5035 standards for tensile strength and elongation; GB / T8942-2016 standards for softness; and GB / T 41560-2022 standards for heat shielding. This application provides a flash sheet that, while ensuring a suitable heat shielding rate, also possesses high flexibility, meeting relevant market demands.

[0016] Chinese Patent Publication No. CN116590846 relates to a flash-spun polyethylene film material with superior toughness and its manufacturing method. The raw material includes polyethylene, and the basis weight (G) of the flash-spun polyethylene film material is greater than 50 g / m². The initial toughness (Z0) of the flash-spun polyethylene film material is 20–35 (N·m) / g; Z0 = [RM × EM + RT × ET] / G; where: RM is the tensile strength in the MD direction; RT is the tensile strength in the TD direction; EM is the elongation in the MD direction; ET is the elongation in the TD direction. The flash-spun polyethylene film material is exposed to a dry, hot atmosphere at 90°C for 6 hours, and then cooled at 25°C and 65% relative humidity for 24 hours. Its light transmittance is then measured to be 8%–13%. The light transmittance test is conducted according to GB / T 2410-2008, and the light transmittance is the ratio of the light flux transmitted through the sample to the light flux incident on the sample, expressed as a percentage. Due to its superior toughness, this application has broad application prospects in packaging, agriculture, and other fields.

[0017] Chinese Patent Publication No. CN116334836 relates to a polyethylene flash-spun nonwoven fabric with uniform thickness. The polyethylene flash-spun nonwoven fabric has a basis weight greater than 50 g / m², a thickness of 0.1–0.3 mm, and the area of ​​the polyethylene flash-spun nonwoven fabric with a thickness in the range of (0.15 mm, 0.2 mm) accounts for more than 60% of the total area. The moisture absorption swelling rate of the polyethylene flash-spun nonwoven fabric is 0.5%–0.8% when the relative humidity is between 33% and 84%. This polyethylene flash-spun nonwoven fabric exhibits uniform texture and has good application prospects.

[0018] Currently, no research on the puncture performance of flash evaporation materials has been found in the aforementioned patent literature. [Summary of the Invention]

[0019] The purpose of this invention is to overcome the shortcomings of the prior art and provide a puncture-resistant flash-evaporation medical protective sheet and its application.

[0020] The objective of this invention is achieved through the following technical solution:

[0021] A puncture-resistant flash-evaporated medical protective sheet, the raw material of which includes polyethylene, and the basis weight of the flash-evaporated medical protective sheet is greater than 30 g / m². 2 ;

[0022] The puncture permeability of flash-evaporated medical protective sheets is 0.3–3 (KN·s) / mm;

[0023] Penetration rate = puncture intensity * air resistance;

[0024] The standard for puncture resistance testing is GB / T 37841-2019, which specifies the test method for puncture resistance of plastic films and sheets.

[0025] The test standard for air permeability resistance is GBT 458-2008 Determination of air permeability of paper and paperboard. Air permeability resistance is measured in seconds, which is the time it takes for 100 ml of gas to pass through.

[0026] The basis weight of flash-evaporated medical protective sheets is less than 200 g / m². 2 .

[0027] The basis weight of flash-evaporated medical protective sheets is less than 180 g / m². 2 .

[0028] The basis weight of flash-evaporated medical protective sheets is less than 160 g / m². 2 .

[0029] The basis weight of flash-evaporated medical protective sheets is less than 140 g / m². 2 .

[0030] The basis weight of flash-evaporated medical protective sheets is less than 120 g / m². 2 .

[0031] The basis weight of flash-evaporated medical protective sheets is less than 100 g / m². 2 .

[0032] The basis weight of flash-evaporated medical protective sheets is less than 90 g / m². 2 .

[0033] The basis weight of flash-evaporated medical protective sheets is less than 80 g / m². 2 .

[0034] The puncture permeability of flash-evaporated medical protective sheets is 0.3–0.6 (KN·s) / mm.

[0035] The puncture permeability of flash-evaporated medical protective sheets is 0.6–0.9 (KN·s) / mm.

[0036] The puncture permeability of flash-evaporated medical protective sheets is 0.9–1.2 (KN·s) / mm.

[0037] The puncture permeability of flash-evaporated medical protective sheets is 1.2–1.5 (KN·s) / mm.

[0038] The puncture permeability of flash-evaporated medical protective sheets is 1.5–1.8 (KN·s) / mm.

[0039] The puncture permeability of flash-evaporated medical protective sheets is 1.8–2.1 (KN·s) / mm.

[0040] The puncture permeability of flash-evaporated medical protective sheets is 2.1–2.4 (KN·s) / mm.

[0041] The puncture permeability of flash-evaporated medical protective sheets is 2.4–2.7 (KN·s) / mm.

[0042] The puncture permeability of flash-evaporated medical protective sheets is 2.7–3.0 (KN·s) / mm.

[0043] The puncture strength of flash-evaporated medical protective sheets is 0.1–0.6 KN / mm.

[0044] The puncture strength of flash-evaporated medical protective sheets is 0.12–0.2 KN / mm.

[0045] The puncture strength of flash-evaporated medical protective sheets is 0.2–0.3 KN / mm.

[0046] The puncture strength of flash-evaporated medical protective sheets is 0.3–0.4 KN / mm.

[0047] The puncture strength of flash-evaporated medical protective sheets is 0.4–0.5 KN / mm.

[0048] The puncture strength of the flash-steam medical protective sheet is 0.5-0.6 KN / mm.

[0049] The air permeability resistance of steam-dried medical protective sheets is 2 to 30 seconds. The air permeability resistance is measured by the time it takes for 100 ml of gas to pass through.

[0050] The standard for puncture resistance testing is GB / T 37841-2019, which specifies the test method for puncture resistance of plastic films and sheets.

[0051] The test standard for air permeability resistance is GBT 458-2008 Determination of air permeability of paper and paperboard. Air permeability resistance is measured by the time it takes for 100 ml of gas to pass through.

[0052] The raw materials for flash-evaporated medical protective sheets also include milled materials, which are nanoporous aluminum and graphene microsheets;

[0053] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.4 to 1:1.8.

[0054] The mass ratio of the ball-milled material to polyethylene is 0.02:1 to 0.04:1;

[0055] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0056] (1) Graphene microsheets and nanoporous aluminum were dry ball-milled to obtain a ball-milled material.

[0057] The ball milling speed is 2800-4200 rpm, the ball milling time is 6-12 hours, the ball milling temperature is 50±2℃, the filling amount is 60-70%, and the zirconium bead particle size is 4-8 mm.

[0058] (2) Dissolve the ball mill material obtained in step (1) and polyethylene in a spinning solvent to obtain a spinning solution;

[0059] The spinning solvent is selected from aromatic hydrocarbons, aliphatic hydrocarbons, alicyclic hydrocarbons, unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, and other solvents.

[0060] The mass fraction of polyethylene in the spinning solution is 7% to 14%;

[0061] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.4 to 1:1.8.

[0062] The mass ratio of the ball-milled material to polyethylene is 0.02:1 to 0.04:1;

[0063] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0064] The spinning temperature for flash spinning is 195℃~220℃;

[0065] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0066] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0067] In addition to the medical protective field, flash-evaporated medical protective sheets are also widely used in various packaging materials.

[0068] Nanoporous aluminum: Nanoporous aluminum has a porous structure, but its special microstructure and high strength can effectively disperse external impact forces, reducing the stress intensity at a single point, thereby enhancing the puncture resistance of flash-evaporated nonwoven fabrics. The dispersion effect of the porous structure allows the material to distribute stress more evenly when subjected to puncture, preventing localized damage.

[0069] Graphene microflakes: Graphene microflakes possess extremely high strength and elastic modulus. In flash-blown nonwoven fabrics, they form a two-dimensional reinforcing network that effectively prevents crack propagation and improves the material's tear and puncture resistance. The strong van der Waals forces and high tensile strength between graphene layers allow the material to more effectively disperse stress when punctured, reducing the expansion of the puncture point. Optimized air permeability: The addition of graphene microflakes can form microchannels or increase the roughness of the material, facilitating the diffusion and penetration of gas molecules, thereby improving the material's air permeability. Although graphene itself does not directly increase pore size, its distribution within the material can optimize the connectivity of existing pores and gas transport paths.

[0070] Compared with the prior art, the positive effects of the present invention are:

[0071] Interfacial interaction: The interaction between nanoporous aluminum and graphene microsheets in flash nonwoven fabric may enhance interfacial bonding through physical adsorption or chemical bonding, forming a more stable composite structure, further improving the overall mechanical properties and structural stability of the material, and having a positive impact on puncture resistance.

[0072] Stress distribution and transfer: The combination of the two optimizes the stress distribution and transfer mechanism. Nanoporous aluminum provides macroscopic support and stress dispersion, while graphene microsheets form a continuous force transmission network at the microscopic level. The synergistic effect of the two enables the material to more uniformly disperse and absorb energy when subjected to puncture force, reducing damage.

[0073] Pore ​​structure optimization: The combination of graphene and nanoporous aluminum may optimize the micropore structure of flash nonwoven fabric by physically filling or guiding pore formation, which can maintain the air permeability of the material and improve its resistance to puncture through complex pore network. [Attached Image Description]

[0074] Figure 1 SEM image of the cross section of Example 2.

Detailed Implementation Methods

[0075] The following provides specific embodiments of a puncture-resistant flash-evaporation medical protective sheet of the present invention and its application.

[0076] Example 1

[0077] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0078] (1) Graphene microsheets and nanoporous aluminum were dry ball-milled to obtain a ball-milled material.

[0079] The ball milling speed is 2800-4200 rpm, the ball milling time is 6-12 hours, the ball milling temperature is 50±2℃, the filling amount is 60-70%, and the zirconium bead particle size is 4-8 mm.

[0080] (2) Dissolve the ball mill material obtained in step (1) and polyethylene in a spinning solvent to obtain a spinning solution;

[0081] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0082] The mass fraction of polyethylene in the spinning solution is 7%;

[0083] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.4.

[0084] The mass ratio of the ball-milled material to polyethylene was 0.02:1;

[0085] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0086] The spinning temperature for flash spinning is 195℃~220℃;

[0087] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0088] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0089] The test data for Example 1 are shown in Table 1.

[0090] Example 2

[0091] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0092] (1) Graphene microsheets and nanoporous aluminum were dry ball-milled to obtain a ball-milled material.

[0093] The ball milling speed is 2800-4200 rpm, the ball milling time is 6-12 hours, the ball milling temperature is 50±2℃, the filling amount is 60-70%, and the zirconium bead particle size is 4-8 mm.

[0094] (2) Dissolve the ball mill material obtained in step (1) and polyethylene in a spinning solvent to obtain a spinning solution;

[0095] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0096] The mass fraction of polyethylene in the spinning solution is 9%;

[0097] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.6.

[0098] The mass ratio of the ball-milled material to polyethylene was 0.03:1;

[0099] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0100] The spinning temperature for flash spinning is 195℃~220℃;

[0101] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0102] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0103] The test data for Example 2 are shown in Table 1.

[0104] Example 3

[0105] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0106] (1) Graphene microsheets and nanoporous aluminum were dry ball-milled to obtain a ball-milled material.

[0107] The ball milling speed is 2800-4200 rpm, the ball milling time is 6-12 hours, the ball milling temperature is 50±2℃, the filling amount is 60-70%, and the zirconium bead particle size is 4-8 mm.

[0108] (2) Dissolve the ball mill material obtained in step (1) and polyethylene in a spinning solvent to obtain a spinning solution;

[0109] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0110] The mass fraction of polyethylene in the spinning solution is 11%;

[0111] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.8.

[0112] The mass ratio of the ball-milled material to polyethylene was 0.04:1;

[0113] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0114] The spinning temperature for flash spinning is 195℃~220℃;

[0115] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0116] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0117] The test data for Example 3 are shown in Table 1.

[0118] Comparative Example 1

[0119] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0120] (1) Graphene microsheets and nanoporous aluminum were dry ball-milled to obtain a ball-milled material.

[0121] The ball milling speed is 2800-4200 rpm, the ball milling time is 6-12 hours, the ball milling temperature is 50±2℃, the filling amount is 60-70%, and the zirconium bead particle size is 4-8 mm.

[0122] (2) Dissolve the ball mill material obtained in step (1) and polyethylene in a spinning solvent to obtain a spinning solution;

[0123] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0124] The mass fraction of polyethylene in the spinning solution is 9%;

[0125] The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.6.

[0126] The mass ratio of the ball-milled material to polyethylene was 0.01:1;

[0127] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0128] The spinning temperature for flash spinning is 195℃~220℃;

[0129] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0130] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0131] The test data for Comparative Example 1 are shown in Table 1.

[0132] Comparative Example 2

[0133] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0134] (1) Graphene microsheets and polyethylene are dissolved in a spinning solvent to obtain a spinning solution;

[0135] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0136] The mass fraction of polyethylene in the spinning solution is 9%;

[0137] The mass ratio of graphene microsheets to polyethylene is 0.03:1;

[0138] (2) Flash spinning is performed on the spinning solution obtained in step (3) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0139] The spinning temperature for flash spinning is 195℃~220℃;

[0140] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0141] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0142] The test data for Comparative Example 2 are shown in Table 1.

[0143] Comparative Example 3

[0144] A method for processing a puncture-resistant flash-evaporation medical protective sheet, comprising the following technical steps:

[0145] (1) Dissolve nanoporous aluminum and polyethylene in a spinning solvent to obtain a spinning solution;

[0146] The spinning solvent is n-pentane, cyclopentane, and 1H,6H-perfluorohexane, with a mass ratio of 5:4:1.

[0147] The mass fraction of polyethylene in the spinning solution is 9%;

[0148] The mass ratio of nanoporous aluminum to polyethylene is 0.03:1;

[0149] (3) Flash spinning is performed on the spinning solution obtained in step (2) to obtain flash fiber, then web laying, hot rolling and hot pressing are performed to finally obtain flash medical protective sheet.

[0150] The spinning temperature for flash spinning is 195℃~220℃;

[0151] The hot rolling temperature is 101±3℃, which is the temperature of the hot rolling roll;

[0152] The hot pressing temperature is 111±3℃, which is the temperature of the hot pressing roller.

[0153] The test data for Comparative Example 3 are shown in Table 1.

[0154] Table 1 Test Result Data Table of this Application

[0155] Penetration rate is (KN·s) / mm Puncture strength KN / mm Example 1 0.513 0.132 Example 2 0.825 0.254 Example 3 1.218 0.448 Comparative Example 1 0.272 0.082 Comparative Example 2 0.238 0.071 Comparative Example 3 0.221 0.066

[0156] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the concept of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A puncture-resistant flash-evaporation medical protective sheet, characterized in that, The raw material for flash-evaporated medical protective sheets includes polyethylene, and the basis weight of the flash-evaporated medical protective sheets is greater than 30 g / m². 2 ; The puncture permeability of flash-evaporated medical protective sheets is 0.3–3 (KN·s) / mm; Penetration rate = puncture intensity * air resistance; The standard for puncture resistance testing is GB / T 37841-2019, which specifies the test method for puncture resistance of plastic films and sheets. The test standard for air permeability resistance is GBT 458-2008 Determination of air permeability of paper and paperboard. Air permeability resistance is measured in seconds, which is the time it takes for 100 ml of gas to pass through.

2. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 0.3–0.6 (KN·s) / mm.

3. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 0.6–0.9 (KN·s) / mm.

4. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 0.9–1.2 (KN·s) / mm.

5. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 1.2–1.5 (KN·s) / mm.

6. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 1.5–1.8 (KN·s) / mm.

7. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 1.8–2.1 (KN·s) / mm.

8. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 2.1–2.4 (KN·s) / mm.

9. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 2.4–2.7 (KN·s) / mm.

10. A puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture permeability of flash-evaporated medical protective sheets is 2.7–3.0 (KN·s) / mm.

11. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.1–0.6 KN / mm.

12. A puncture-resistant flash-evaporation medical protective sheet according to claim 11, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.12–0.2 KN / mm.

13. A puncture-resistant flash-evaporation medical protective sheet according to claim 11, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.2–0.3 KN / mm.

14. The puncture-resistant flash-evaporation medical protective sheet according to claim 11, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.3–0.4 KN / mm.

15. A puncture-resistant flash-evaporation medical protective sheet according to claim 11, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.4–0.5 KN / mm.

16. A puncture-resistant flash-evaporation medical protective sheet according to claim 11, characterized in that, The puncture strength of flash-evaporated medical protective sheets is 0.5–0.6 KN / mm.

17. A puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The raw materials for flash-evaporated medical protective sheets also include milled materials, which are nanoporous aluminum and graphene microsheets.

18. A puncture-resistant flash-evaporation medical protective sheet according to claim 17, characterized in that... The mass ratio of nanoporous aluminum to graphene microsheets is 1:1.4 to 1:1.

8.

19. A puncture-resistant flash-evaporation medical protective sheet according to claim 17, characterized in that, The mass ratio of the ball mill material to polyethylene is 0.02:1 to 0.04:

1.

20. A puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 200 g / m². 2 .

21. A puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 180 g / m². 2 .

22. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 160 g / m². 2 .

23. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 140 g / m². 2 .

24. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 120 g / m². 2 .

25. A puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 100 g / m². 2 .

26. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 90 g / m². 2 .

27. The puncture-resistant flash-evaporation medical protective sheet according to claim 1, characterized in that, The basis weight of flash-evaporated medical protective sheets is less than 80 g / m². 2 .

Images