Functional fabric based on anti-radiation material and preparation method thereof

Abstract

The invention relates to a functional fabric based on an anti-radiation material and a preparation method thereof, and relates to the technical field of fabrics, the functional fabric based on the anti-radiation material is obtained by weaving nylon 66 color master batch yarns as warp yarns and silicon carbide modified nylon 66 color master batch yarns as weft yarns; wherein the nylon 66 color master batch yarn is obtained by melting and spinning the following raw materials in percentage by mass: 60-85% of nylon 66 slices, 5-20% of nylon 66 color master batch, 5-20% of filler, 1-5% of solvent oil and 0.5-2% of antioxidant; the silicon carbide modified nylon 66 color master batch yarn is obtained by adding silicon carbide micro powder in the process of preparing the nylon 66 color master batch yarn through melt spinning. The fabric provided by the invention has better radiation resistance, tear resistance and high temperature resistance, and has superbright gloss and smoothness, and the functionality and quality of the fabric are further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabrics, and in particular relates to a functional fabric based on radiation protection material and a preparation method thereof. Background Art

[0002] Silicon carbide fiber is a ceramic fiber with carbon and silicon as the main components. Due to its stable chemical properties, high thermal conductivity, radiation protection, high temperature resistance and excellent mechanical properties, it has been applied in cutting-edge technology fields such as aerospace, rocket engines, and nuclear energy materials.

[0003] As people's demand for functional fabrics increases, the application of silicon carbide materials as a reinforcing blending material in the preparation of functional fabrics can improve the heat resistance, radiation protection and other properties of functional fabrics, and has good application prospects. However, due to the fine particles of silicon carbide micropowders, high surface energy and easy agglomeration, its excellent mechanical properties are difficult to fully exert, and its compatibility with nylon, polyester and other fibers as a reinforcing blending material needs to be further improved;

[0004] In addition, for functional fabrics, their gloss is also one of the important indicators for improving fabric quality. The improvement of fabric gloss can generally be achieved by calendering the fabric. Calendering finishing is a process that uses high pressure and appropriate temperature conditions to flatten and grind the surface of the fabric to the fiber ends to promote the improvement of the gloss of the fabric. In the actual processing process, the fabric that has been calendered is prone to have a hard feel and reduced smoothness, which is not conducive to the comprehensive improvement of the quality of functional fabrics. Summary of the invention

[0005] The purpose of the present invention is to provide a functional fabric based on radiation protection material and a preparation method thereof in order to solve the above problems.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] As a first aspect of the present invention, the present invention provides a functional fabric based on radiation protection material, wherein the functional fabric based on radiation protection material is obtained by weaving nylon 66 masterbatch yarn as warp yarn and silicon carbide modified nylon 66 masterbatch yarn as weft yarn; wherein,

[0008] The nylon 66 masterbatch yarn is obtained by melt spinning the following raw materials in percentage by mass: 60-85% of nylon 66 chips, 5-20% of nylon 66 masterbatch, 5-20% of filler, 1-5% of solvent oil and 0.5-2% of antioxidant;

[0009] The silicon carbide modified nylon 66 masterbatch yarn is obtained by adding silicon carbide powder in the process of preparing nylon 66 masterbatch yarn by melt spinning.

[0010] As a further optimization scheme of the present invention, the amount of the silicon carbide micropowder used is 2-10% of the mass of nylon 66 chips used for the nylon 66 masterbatch yarn.

[0011] As a further optimization scheme of the present invention, the silicon carbide micropowder is subjected to surface hydroxylation treatment, and the specific treatment process is: according to the mass volume ratio of 1g:(4-8)mL, the silicon carbide micropowder is added to a hydrochloric acid solution with a molar concentration of 1-3mol / L, and after sufficient stirring, centrifugation, washing and drying are performed in sequence to obtain it.

[0012] As a further optimization scheme of the present invention, the fineness of the nylon 66 masterbatch yarn is 20-40D, and the fineness of the silicon carbide modified nylon 66 masterbatch yarn is 20-50D.

[0013] As a second aspect of the present invention, the present invention also provides a method for preparing a functional fabric based on any of the above-mentioned radiation protection materials, which specifically comprises the following steps:

[0014] (1) preparing nylon 66 masterbatch yarn, firstly blending nylon 66 slices, nylon 66 masterbatch, filler, solvent oil and antioxidant, and sending the obtained blend to a melt spinning machine for spinning to obtain spun yarn, and then stretching and cooling the spun yarn to obtain the nylon 66 masterbatch yarn;

[0015] (2) preparing silicon carbide modified nylon 66 masterbatch yarn, according to the step of preparing nylon 66 masterbatch yarn in step (1), adding silicon carbide powder during the process of preparing primary silk by melt spinning;

[0016] (3) using the nylon 66 masterbatch yarn prepared in step (1) as the warp yarn and the silicon carbide modified nylon 66 masterbatch yarn prepared in step (2) as the weft yarn for weaving to obtain a fabric;

[0017] (4) Calendering and finishing: the fabric prepared in step (3) is first subjected to a mirror surface cold pressing treatment, then subjected to an oil surface hot pressing treatment, and finally subjected to a second mirror surface cold pressing treatment.

[0018] As a further optimization scheme of the present invention, in the step (3), the weaving density of the warp yarn is 65-90 yarns / cm, the weaving density of the weft yarn is 55-75 yarns / cm, and the weaving structure is a hidden grid.

[0019] As a further optimization scheme of the present invention, in the step (4), the process parameters of the primary mirror cold pressing treatment and the secondary mirror cold pressing treatment are: under unheated conditions, the fabric conveying speed is 50-70m / min, and the pressurizing pressure is 8-10kg.

[0020] As a further optimization scheme of the present invention, in the step (4), the process parameters of the oil surface hot pressing treatment are: hot pressing temperature is 190-240°C, cloth conveying speed is 50-70m / min, and pressing pressure is 6-8kg.

[0021] The beneficial effects of the present invention are:

[0022] (1) The weft yarn of the present invention is a fabric obtained by using silicon carbide materials commonly used in the fields of nuclear energy to modify nylon 66 masterbatch yarn, and then weaving it with nylon 66 masterbatch yarn. With the help of the excellent radiation protection and high temperature resistance of silicon carbide, the functionality of the fabric is further improved, and the fabric has good radiation protection and high temperature resistance.

[0023] (2) The present invention increases the hydroxyl content on the surface of silicon carbide micropowder by surface pickling, thereby improving its compatibility with nylon 66 material and ensuring the effective performance of its mechanical properties, thereby enabling the prepared fabric to obtain better tear resistance.

[0024] (3) The present invention optimizes the calendering finishing process of the fabric, increases the temperature of the oil surface hot pressing to further enhance the glossiness of the fabric, and simultaneously adds a mirror cold pressing before and after the oil surface hot pressing to compensate for the problem of the fabric becoming harder due to the oil surface hot pressing, so that the fabric has both super bright gloss and excellent smoothness.

[0025] (4) The fabric of the present invention does not require a dyeing process because the masterbatch yarn is used, which can save water, steam and electricity resources and is more environmentally friendly. DETAILED DESCRIPTION

[0026] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] In the following examples, any method not specified may be carried out according to conventional methods, and the materials, reagents, etc. used may be obtained through commercial channels unless otherwise specified.

[0028] Example 1

[0029] This embodiment provides a method for preparing a functional fabric based on radiation protection material, comprising the following steps:

[0030] (1) Preparation of nylon 66 masterbatch yarn

[0031] First, the following raw materials in mass percentage are blended to obtain a blend: 84% nylon 66 chips, 5% nylon 66 masterbatch, 5% talcum powder (filler), 5% white oil (solvent oil) and 1% antioxidant 168 (antioxidant), and the blend is sent to a melt spinning machine for spinning to obtain spun yarn. After the spun yarn is stretched and cooled, the nylon 66 masterbatch yarn can be obtained.

[0032] (2) Preparation of Silicon Carbide Modified Nylon 66 Masterbatch Yarn

[0033] First, silicon carbide powder is added to a hydrochloric acid solution with a molar concentration of 3 mol / L according to a mass volume ratio of 1 g: 5 mL, and after sufficient stirring, centrifugation, washing, and drying are performed in sequence to obtain surface hydroxylated silicon carbide powder. According to the step (1) of preparing nylon 66 masterbatch yarn, the surface hydroxylated silicon carbide powder is added during the process of melt spinning to prepare the primary silk, and the added amount is 2% of the mass of nylon 66 chips used for the nylon 66 masterbatch yarn.

[0034] In the steps (1)-(2), the process of melt spinning the blend to obtain spun yarn and stretching the spun yarn is specifically as follows: the blend is directly put into a screw extruder with a length-to-diameter ratio of 20:1 for melt extrusion to obtain spun yarn, the process parameters of the screw extruder are specifically as follows: the temperatures of the screw sections are 190° C. for the feeding section, 240° C. for the compression section, and 260° C. for the metering section, the screw speed is 200 r / min, the length of the flow channel at the end of the screw extruder is 5 cm, the length-to-diameter ratio of the spinneret is 15:1, the obtained spun yarn is subjected to primary stretching at 115° C. with a stretching multiple of 5 times, and secondary stretching at 130° C. with a stretching multiple of 3 times to complete the stretching.

[0035] (3) The nylon 66 masterbatch yarn with a fineness of 40D obtained in step (1) is used as the warp yarn, and the silicon carbide modified nylon 66 masterbatch yarn with a fineness of 50D obtained in step (2) is used as the weft yarn, and the surface fabric is obtained by weaving, wherein the weaving density of the warp yarn is 65 yarns / cm, the weaving density of the weft yarn is 55 yarns / cm, and the weaving structure is a hidden grid.

[0036] (4) Calendering and finishing: the surface fabric prepared in step (3) is first subjected to a mirror surface cold pressing treatment, then subjected to an oil surface hot pressing treatment, and finally subjected to a second mirror surface cold pressing treatment. The process parameters of the first mirror surface cold pressing treatment and the second mirror surface cold pressing treatment are both under non-heating conditions: the fabric conveying speed is 50 m / min, and the pressing pressure is 10 kg. The process parameters of the oil surface hot pressing treatment are: hot pressing temperature is 240° C., the fabric conveying speed is 50 m / min, and the pressing pressure is 8 kg.

[0037] Example 2

[0038] This embodiment provides a method for preparing a functional fabric based on radiation protection material, comprising the following steps:

[0039] (1) Preparation of nylon 66 masterbatch yarn

[0040] First, the following raw materials in mass percentage are blended to obtain a blend: 74% nylon 66 chips, 10% nylon 66 masterbatch, 10% talcum powder (filler), 5% white oil (solvent oil) and 1% antioxidant 168 (antioxidant), and the blend is sent to a melt spinning machine for spinning to obtain spun yarn. After the spun yarn is stretched and cooled, the nylon 66 masterbatch yarn can be obtained.

[0041] (2) The preparation steps of silicon carbide modified nylon 66 masterbatch yarn are the same as those in Example 1.

[0042] In the steps (1)-(2), the process of melt spinning the blend to obtain spun yarn and drawing the spun yarn is the same as in Example 1.

[0043] (3) The nylon 66 masterbatch yarn with a fineness of 40D obtained in step (1) is used as the warp yarn, and the silicon carbide modified nylon 66 masterbatch yarn with a fineness of 50D obtained in step (2) is used as the weft yarn, and the surface fabric is obtained by weaving, wherein the weaving density of the warp yarn is 90 yarns / cm, the weaving density of the weft yarn is 75 yarns / cm, and the weaving structure is a hidden grid.

[0044] (4) Calendering and finishing: the surface fabric prepared in step (3) is first subjected to a mirror surface cold pressing treatment, then subjected to an oil surface hot pressing treatment, and finally subjected to a second mirror surface cold pressing treatment. The process parameters of the first mirror surface cold pressing treatment and the second mirror surface cold pressing treatment are both under non-heating conditions: the fabric conveying speed is 70 m / min, and the pressing pressure is 8 kg. The process parameters of the oil surface hot pressing treatment are: hot pressing temperature is 240° C., the fabric conveying speed is 70 m / min, and the pressing pressure is 6 kg.

[0045] Example 3

[0046] This embodiment provides a method for preparing a functional fabric based on radiation protection material, comprising the following steps:

[0047] (1) Preparation of nylon 66 masterbatch yarn

[0048] First, the following raw materials in mass percentage are blended to obtain a blend: 64% nylon 66 chips, 20% nylon 66 masterbatch, 10% talcum powder (filler), 5% white oil (solvent oil) and 1% antioxidant 168 (antioxidant), and the blend is sent to a melt spinning machine for spinning to obtain spun yarn. After the spun yarn is stretched and cooled, the nylon 66 masterbatch yarn can be obtained.

[0049] (2) The preparation steps of silicon carbide modified nylon 66 masterbatch yarn are the same as those in Example 1.

[0050] In the steps (1)-(2), the process of melt spinning the blend to obtain spun yarn and drawing the spun yarn is specifically as follows: the blend is directly put into a screw extruder with a length-to-diameter ratio of 20:1 for melt extrusion to obtain spun yarn, the process parameters of the screw extruder are specifically as follows: the temperatures of the screw sections are 190° C. for the feeding section, 240° C. for the compression section, and 260° C. for the metering section, the screw speed is 200 r / min, the length of the flow channel at the end of the screw extruder is 5 cm, the length-to-diameter ratio of the spinneret is 15:1, and the obtained spun yarn is subjected to primary drawing at 115° C. with a drawing multiple of 8 times, and secondary drawing at 130° C. with a drawing multiple of 5 times to complete the drawing.

[0051] (3) The nylon 66 masterbatch yarn with a fineness of 20D obtained in step (1) is used as the warp yarn, and the silicon carbide modified nylon 66 masterbatch yarn with a fineness of 20D obtained in step (2) is used as the weft yarn, and the surface fabric is obtained by weaving, wherein the weaving density of the warp yarn is 70 yarns / cm, the weaving density of the weft yarn is 60 yarns / cm, and the weaving structure is a hidden grid.

[0052] (4) The post-calendering finishing steps are the same as those in Example 1.

[0053] Verification test

[0054] 1. In order to explore the influence of the use of functional ingredients on the performance of functional fabrics, based on the composition and ratio of the nylon 66 masterbatch yarn disclosed in Example 1, the type and usage of the functional ingredients were adjusted according to Table 1, and then, the fabric samples AE were prepared according to the preparation method of the functional fabric disclosed in Example 1.

[0055] Table 1. Composition and ratio of silicon carbide modified nylon 66 masterbatch yarn

[0056]

[0057]

[0058] Note: The preparation method of the surface hydroxylated silicon carbide micropowder is the same as that described in Example 1. The fineness of the silicon carbide micropowder and the glass fiber micropowder is the same.

[0059] The following performance tests were performed on fabric sample AE:

[0060] (1) Radiation protection performance test: The electromagnetic shielding test method used is the waveguide method of SN / T2161-2008 Textile Microwave Protection Performance Test Method. The center frequency of the test is 2450MHz, the test index is shielding efficiency (unit: dB), and the test size of the fabric sample is 85mm×40mm. The humidity adjustment and testing of the fabric sample are in accordance with the second-level atmospheric conditions of GB6529. The experiment is carried out under the conditions of ambient temperature of (20±2)℃ and relative humidity of air of (65±3)%. If the sample is damp before humidity adjustment, it should be dried at 65℃ before humidity adjustment.

[0061] (2) Heat resistance test: The fabric samples were heat treated in a constant temperature electric heating blast drying oven for 2 hours, and the test temperature was 240°C. The tear strength values ​​(warp and weft) of the fabric samples before and after heat treatment were tested according to GB / T3917-1:2009 "Tear properties of fabrics - Part 1 - Determination of tear strength by impact pendulum method" with 5 repetitions per group, and the tear strength loss rate of the fabric samples after heat treatment was calculated, and the average value was taken.

[0062] The results are shown in Table 2.

[0063] Table 2. Result statistics

[0064]

[0065]

[0066] According to the electromagnetic shielding effectiveness evaluation standard: when the shielding effect is 0-10dB, there is basically no shielding effect; when the shielding effect is 10-30dB, the shielding effect is poor; when the shielding effect is 30-60dB, the shielding effect is medium and can be used; when the shielding effect is 60-90dB, the shielding effect is good; and the shielding effect above 90dB is the best. As can be seen from Table 2, the shielding efficiency of fabric sample AC is above 60dB, and the shielding effect is good, while the shielding effect of fabric sample DE is medium, which is not as good as fabric sample AC.

[0067] Fabric sample AC has additional silicon carbide powder added to the weft yarn composition. Silicon carbide powder is often used in the field of nuclear energy materials and has strong radiation resistance. Therefore, adding this material to nylon 66 masterbatch yarn helps to improve the overall radiation resistance of the fabric. In addition, due to the high temperature resistance of silicon carbide, the overall high temperature resistance of the fabric is effectively improved.

[0068] In addition, because silicon carbide has strong mechanical properties, but the particles of silicon carbide powder are fine and have high surface energy, they are prone to agglomeration, which is not conducive to the performance of its excellent mechanical properties. The silicon carbide powder added to fabric sample AC is acidified and modified to increase the hydroxyl content on the surface of silicon carbide powder, so that its compatibility with nylon 66 material is improved, ensuring the performance of its mechanical properties. When testing the heat resistance of fabrics, the initial tear strength values ​​of fabric sample AC were recorded as fabric sample A: 120N in warp direction; 124N in weft direction; fabric sample A: 123N in warp direction; 128N in weft direction; fabric sample C: 125N in warp direction; 137N in weft direction. The initial tear strength values ​​of fabric sample D are 109N in warp direction; 115N in weft direction. It can be seen from the initial tear strength values ​​of each fabric that fabric sample AC has better tear resistance.

[0069] 2. In order to explore the effect of calendering finishing on the performance of functional fabrics, the following treatment groups were set for the calendering finishing process: Specifically, based on the preparation method of fabric sample C, the calendering finishing process was adjusted to set the following treatment groups:

[0070] Treatment group 1: firstly subject the fabric to a mirror cold pressing treatment, then subject the fabric subjected to the mirror cold pressing treatment to an oil surface hot pressing treatment, and finally subject the fabric subjected to the oil surface hot pressing treatment to a second mirror cold pressing treatment. The process parameters of the first mirror cold pressing treatment and the second mirror cold pressing treatment are both under non-heating conditions, the fabric conveying speed is 50m / min, the pressing pressure is 10kg, and the process parameters of the oil surface hot pressing treatment are: hot pressing temperature is 240℃, the fabric conveying speed is 50m / min, and the pressing pressure is 8kg.

[0071] Treatment group 2: The difference from treatment group 1 is that the fabric is firstly subjected to a mirror surface cold pressing treatment, and then the fabric subjected to the mirror surface cold pressing treatment is subjected to an oil surface hot pressing treatment.

[0072] Treatment group 3: The difference from treatment group 1 is that the fabric is first subjected to oil surface hot pressing treatment, and then the fabric subjected to oil surface hot pressing treatment is subjected to mirror surface cold pressing treatment.

[0073] Treatment group 4: The difference from treatment group 3 is that the fabric is only treated with oil surface heat pressing.

[0074] Treatment group 5: The difference from treatment group 1 is that the hot pressing temperature is 190°C.

[0075] Treatment group 6: The difference from treatment group 4 is that the hot pressing temperature is 190°C.

[0076] Control group 1: when preparing fabric sample E, calendering and finishing were performed on fabric sample E according to the calendering and finishing process of treatment group 1.

[0077] The fabric samples prepared from treatment groups 1-6 and control group 1 were subjected to the following performance tests.

[0078] (1) Fabric gloss test: the test method is based on the textile industry standard FZ / T 01097-2006 Fabric gloss test method, using a fabric gloss meter for testing. Calculate the gloss based on the test results: that is, calculate the gloss of the fabric based on the measured regular reflection light intensity and diffuse reflection light intensity; the gloss calculation formula is:

[0079] Among them, GC is the glossiness of the fabric; GS is the intensity of the fabric's direct reflected light, %; GR is the intensity of the fabric's diffuse reflected light, %.

[0080] (2) Slip performance test: Referring to the standard FZ / T 01054-2012 "Test method for friction performance of fabric surface", the KES-FB4-A surface performance tester was used to test the slip performance of the fabric surface. The test indicators include friction coefficient and surface roughness.

[0081] The results are shown in Table 3.

[0082] Table 3. Result statistics

[0083]

[0084] As can be seen from Table 3, the process selection of calendering finishing has an impact on the gloss and smoothness of the fabric. The temperature of the oil surface hot pressing treatment of treatment group 5 is lower than that of treatment group 1, and the gloss of the fabric is not as good as that of treatment group 1. It can be seen that the higher the temperature of calendering finishing, the higher the gloss of the fabric will be.

[0085] From the comparison between treatment group 4 and treatment group 1, it can be seen that the oil surface hot pressing treatment alone has an adverse effect on the smoothness of the fabric, because the hot pressing finishing uses the plasticity of the fiber under mixed heat conditions to flatten the surface of the fabric, which will cause the fabric to become hard. From the comparison between treatment group 1 and treatment group 4, it can be seen that adding a mirror cold pressing treatment before and after the hot pressing finishing can effectively improve the above problems and ensure that the fabric has both super bright luster and excellent smoothness. In addition, from the comparison between control group 1 and treatment group 1, it can be seen that the effect of adding glass fiber to the composition of nylon 66 masterbatch yarn on improving the gloss and smoothness of the fabric is not as good as adding silicon carbide micropowder.

[0086] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A functional fabric based on radiation protection material, characterized by: The functional fabric based on the radiation protection material is obtained by weaving nylon 66 masterbatch yarn as warp yarn and silicon carbide modified nylon 66 masterbatch yarn as weft yarn; wherein the nylon 66 masterbatch yarn is obtained by melt spinning the following raw materials in percentage by mass: 60-85% of nylon 66 chips, 5-20% of nylon 66 masterbatch, 5-20% of filler, 1-5% of solvent oil and 0.5-2% of antioxidant; The silicon carbide modified nylon 66 masterbatch yarn is obtained by adding silicon carbide powder in the process of preparing nylon 66 masterbatch yarn by melt spinning.

2. The functional fabric based on radiation protection material according to claim 1, characterized in that: The amount of the silicon carbide powder used is 2-10% of the mass of the nylon 66 chips used for the nylon 66 masterbatch yarn.

3. The functional fabric based on radiation protection material according to claim 1, characterized in that: The silicon carbide micropowder is subjected to surface hydroxylation treatment, and the specific treatment process is: according to the mass volume ratio of 1g: (4-8)mL, the silicon carbide micropowder is added to a hydrochloric acid solution with a molar concentration of 1-3mol / L, and after sufficient stirring, centrifugation, washing and drying are performed in sequence to obtain the silicon carbide micropowder.

4. The functional fabric based on radiation protection material according to claim 1, characterized in that: The fineness of the nylon 66 masterbatch yarn is 20-40D, and the fineness of the silicon carbide modified nylon 66 masterbatch yarn is 20-50D.

5. A method for preparing a functional fabric based on a radiation protection material according to any one of claims 1 to 4, characterized in that: The specific steps include: (1) preparing nylon 66 masterbatch yarn, firstly blending nylon 66 slices, nylon 66 masterbatch, filler, solvent oil and antioxidant, and sending the obtained blend to a melt spinning machine for spinning to obtain spun yarn, and then stretching and cooling the spun yarn to obtain the nylon 66 masterbatch yarn; (2) preparing silicon carbide modified nylon 66 masterbatch yarn, according to the step (1) of preparing nylon 66 masterbatch yarn, adding silicon carbide powder during the process of melt spinning to prepare primary silk; (3) using the nylon 66 masterbatch yarn prepared in step (1) as the warp yarn and the silicon carbide modified nylon 66 masterbatch yarn prepared in step (2) as the weft yarn for weaving to obtain a fabric; (4) Calendering and finishing: the fabric prepared in step (3) is first subjected to a mirror surface cold pressing treatment, then subjected to an oil surface hot pressing treatment, and finally subjected to a second mirror surface cold pressing treatment.

6. The method for preparing a functional fabric based on radiation protection material according to claim 5, characterized in that: In the step (3), the weaving density of the warp yarn is 65-90 yarns / cm, the weaving density of the weft yarn is 55-75 yarns / cm, and the weaving structure is a hidden grid.

7. The method for preparing a functional fabric based on radiation protection material according to claim 5, characterized in that: In the step (4), the process parameters of the first mirror cold pressing treatment and the second mirror cold pressing treatment are: under the unheated condition, the cloth conveying speed is 50-70m / min, and the pressing pressure is 8-10kg.

8. The method for preparing a functional fabric based on radiation protection material according to claim 5, characterized in that: In the step (4), the process parameters of the oil surface hot pressing treatment are: hot pressing temperature is 190-240°C, cloth conveying speed is 50-70m / min, and pressing pressure is 6-8kg.

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