阅读说明：本技术 一种防护服面料及其制备工艺及防护服 (Protective clothing fabric, preparation process thereof and protective clothing ) 是由 徐开玖 罗卫东 曹纯花 司吉海 王向波 曹凤芹 于 2021-06-26 设计创作，主要内容包括：本申请涉及防护技术领域,具体公开了一种防护服面料及其制备工艺及防护服包括以下重量份的原料制成：间位芳纶60-75份、钛白粉改性氨纶17-25份、白炭黑改性涤纶17-25份、富强纤维10-18份、竹炭纤维3-10份、聚酰亚胺纤维10-20份；所述钛白粉改性氨纶是将氨纶于220℃-230℃下真空熔融后加入钛白粉,保温20-25min,57-59rpm下搅拌15-20min后经湿法纺丝制得；所述白炭黑改性涤纶是将白炭黑与涤纶均匀混合后,于260-270℃下真空熔融,保温13-15min,经干法纺丝制得；其制备方法为：(1)制备内层纤维；(2)制备中层纤维；(3)制备外层纤维；(4)纺织。本申请的产品可用于防护服制造,其具有克重轻、阻燃性好、耐高温性好且纤维强度高的优点。(The application relates to the technical field of protection, and particularly discloses a protective clothing fabric and a preparation process thereof, wherein the protective clothing fabric is prepared from the following raw materials in parts by weight: 60-75 parts of meta-aramid, 17-25 parts of titanium dioxide modified spandex, 17-25 parts of white carbon black modified terylene, 10-18 parts of polynosic fiber, 3-10 parts of bamboo charcoal fiber and 10-20 parts of polyimide fiber; the titanium dioxide modified spandex is prepared by vacuum melting spandex at 220-230 ℃, adding titanium dioxide, keeping the temperature for 20-25min, stirring at 57-59rpm for 15-20min, and performing wet spinning; the white carbon black modified terylene is prepared by uniformly mixing white carbon black and terylene, carrying out vacuum melting at 260-270 ℃, carrying out heat preservation for 13-15min, and carrying out dry spinning; the preparation method comprises the following steps: (1) preparing inner layer fibers; (2) preparing a middle layer fiber; (3) preparing outer layer fibers; (4) and (5) spinning. The product of the application can be used for manufacturing protective clothing, and has the advantages of light gram weight, good flame retardance, good high-temperature resistance and high fiber strength.)

1. The fabric for the protective clothing is characterized in that: the feed is prepared from the following raw materials in parts by weight: 60-75 parts of meta-aramid, 17-25 parts of titanium dioxide modified spandex, 17-25 parts of white carbon black modified terylene, 10-18 parts of polynosic fiber, 3-10 parts of bamboo charcoal fiber and 10-20 parts of polyimide fiber;

the titanium dioxide modified spandex is prepared by vacuum melting spandex at 220-230 ℃, adding titanium dioxide, keeping the temperature for 20-25min, stirring at 57-59rpm for 15-20min, and performing wet spinning;

the white carbon black modified terylene is prepared by uniformly mixing white carbon black and terylene, carrying out vacuum melting at 260-270 ℃, carrying out heat preservation for 13-15min, and carrying out dry spinning.

2. The protective garment fabric according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 60-75 parts of meta-aramid, 17-25 parts of titanium dioxide modified spandex, 17-25 parts of white carbon black modified terylene, 10-18 parts of polynosic fiber, 3-10 parts of bamboo charcoal fiber and 13-17 parts of polyimide fiber.

3. The protective garment fabric according to claim 2, wherein: the addition amount of the titanium dioxide is 2.7-4% of the weight of the spandex.

4. The protective garment fabric according to claim 3, wherein: the spinning temperature of the wet spinning is 50-60 ℃.

5. The protective garment fabric according to claim 2, wherein: the addition amount of the white carbon black is 2.7-4% of the weight of the terylene.

6. The protective garment fabric according to claim 5, wherein: the spinning temperature of the dry spinning is 40-50 ℃.

7. A process for preparing a fabric for protective clothing according to any one of claims 1 to 6, which is characterized in that: the method comprises the following steps:

(1) preparing inner layer fibers: blending the rich-strength fibers and the bamboo charcoal fibers to prepare inner layer fibers;

(2) preparing a middle layer fiber: blending the polyimide fiber with the inner layer fiber, wherein the polyimide fiber safely wraps the inner layer fiber, and the yarn count is 16-18Tex to prepare a middle layer fiber;

(3) preparing outer layer fibers: blending meta-aramid, titanium dioxide modified spandex, white carbon black modified polyester and middle-layer fiber, completely wrapping the meta-aramid, the modified spandex and the modified polyester with the middle-layer fiber, and preparing outer-layer fiber with the yarn count of 23-25 Tex;

(4) weaving: and spinning the outer layer fibers into cloth to obtain the protective clothing fabric.

8. A protective garment, characterized in that: comprising an insulating layer made of a shell fabric for protective clothing according to any one of claims 1 to 6.

Technical Field

The application relates to the technical field of protection, and more particularly relates to protective clothing.

Background

The protective clothing is divided into health protective clothing such as radiation protection clothing, cold protective clothing, heat insulation clothing, antibacterial clothing and the like according to the function types; safety protective clothing, such as flame-retardant clothing, flame-retardant protective clothing, arc protective clothing, antistatic clothing, bullet-proof clothing, stab-resistant clothing, space suit, diving suit, acid-proof clothing, insect-proof clothing, and the like; work clothes for keeping the wearer sanitary, such as oil-proof clothes, dust-proof clothes, water-repellent clothes and the like.

The protective clothing is mainly applied to the use in the environments of industry, electronics, medical treatment, chemical defense, bacterial infection prevention and the like, and has differences due to different protection purposes and protection principles. The protective clothing with the fireproof and heat-insulating effects can reflect heat radiation, can directly contact flame, and can penetrate through a fire scene at 800-1000 ℃ in a short time when being worn.

The protective clothing with the functions of fire prevention and heat insulation is made of a composite material of a flame-retardant fiber fabric and a vacuum aluminized film, and is formed by compounding an outer layer, a heat insulation layer, a comfort layer and other multiple layers of fabrics from outside to inside in sequence, wherein the outer layer is a metal aluminum surface material with the function of reflecting radiant heat.

With respect to the related art in the above, the inventors consider that: the heat-insulating layer cloth of the protective clothing with the fireproof effect has large gram weight in order to enhance the flame retardant property, and the weight of the protective clothing made of the heat-insulating layer cloth has large burden when the protective clothing with the fireproof effect is worn for activity.

Disclosure of Invention

In order to reduce the gram weight of protective clothing heat-insulating layer cloth, the application provides protective clothing fabric and a preparation process thereof and protective clothing.

The application provides a protective clothing surface fabric adopts following technical scheme:

in a first aspect, the application provides a protective clothing fabric, which adopts the following technical scheme:

the protective clothing fabric is prepared from the following raw materials in parts by weight: 60-75 parts of meta-aramid, 17-25 parts of titanium dioxide modified spandex, 17-25 parts of white carbon black modified terylene, 10-18 parts of polynosic fiber, 3-10 parts of bamboo charcoal fiber and 10-20 parts of polyimide fiber;

the titanium dioxide modified spandex is prepared by vacuum melting spandex at 220-230 ℃, adding titanium dioxide, keeping the temperature for 20-25min, stirring at 57-59rpm for 15-20min, and performing wet spinning;

the white carbon black modified terylene is prepared by uniformly mixing white carbon black and terylene, carrying out vacuum melting at 260-270 ℃, carrying out heat preservation for 13-15min, and carrying out dry spinning.

By adopting the technical scheme, the spandex is subjected to vacuum melting and then is modified by adding the titanium dioxide, so that the strength and the heat-resistant temperature of the spandex are improved, and the fiber of the titanium dioxide modified spandex prepared by wet spinning has high fiber strength and high heat resistance; the terylene modified by the white carbon black has high heat-resistant temperature, high fiber strength and compact structure; because the rich-strength fiber has high wet strength, small elongation at break and good dimensional stability, the meta-aramid fiber has excellent high temperature resistance, good dimensional stability and fire resistance. Therefore, the raw materials and the using amount of the flame-retardant and strength-enhanced fabric have the advantages that the flame retardance and the strength of the fabric in unit gram weight are improved, the using amount of the raw materials is reduced, the gram weight of the prepared fabric is lighter, and the flame retardance and the strength are better.

In addition, the titanium dioxide is widely used in the industry, is odorless and tasteless, is insoluble in water, hydrochloric acid, dilute sulfuric acid, ethanol and other organic solvents, and has stable chemical properties, and the method for modifying spandex by utilizing the titanium dioxide is low in cost and convenient to put into large-scale industrial production. At present, non-metallic ore is usually adopted as a silicon source to prepare the white carbon black, so that the production cost is low, the economy is good, and the method for modifying the terylene by the white carbon black has low production cost in industrial production and is convenient for large-scale industrial production.

Preferably, the feed is prepared from the following raw materials in parts by weight: 60-75 parts of meta-aramid, 17-25 parts of titanium dioxide modified spandex, 17-25 parts of white carbon black modified terylene, 10-18 parts of polynosic fiber, 3-10 parts of bamboo charcoal fiber and 13-17 parts of polyimide fiber.

By adopting the technical scheme, the flame retardance of the protective clothing fabric with unit gram weight can be further improved by using the protective clothing fabric made of the raw materials in the mass parts in the range.

Preferably, the addition amount of the titanium dioxide is 2.7-4% of the weight of the spandex.

By adopting the technical scheme, the titanium dioxide has good dispersibility, and the spandex is modified by the titanium dioxide which is added in the weight percentage range, so that the prepared modified spandex fiber has high strength and high heat resistance, the property of the spandex fiber is not changed, and the fabric made of the modified spandex fiber is convenient for accelerating the emission of heat and sweat.

Preferably, the spinning temperature of the wet spinning is 50-60 ℃.

By adopting the technical scheme, the spandex prepared by wet spinning in the temperature range has the characteristics of high elongation and high strength, and simultaneously has good chlorine resistance and aging resistance, and the fiber prepared by the method shows good shaping capability and textile technological performance in the subsequent blending process.

Preferably, the addition amount of the white carbon black is 2.7-4% of the weight of the terylene.

By adopting the technical scheme, the white carbon black with the mass percentage in the range can improve the heat-resistant temperature and the fiber strength of the terylene, and the property of the terylene is not changed, so that the porosity in the fiber can be increased after the prepared modified terylene is blended, and the dissipation of sweat and heat is accelerated.

Preferably, the spinning temperature of the dry spinning is 40-50 ℃.

By adopting the technical scheme, the modified spandex fiber prepared by dry spinning in the temperature range has better physical and mechanical properties and high fiber quality, and the prepared protective clothing fabric has higher strength and wear resistance.

In a second aspect, the application provides a preparation process of protective clothing fabric, which adopts the following technical scheme:

a preparation process of protective clothing fabric comprises the following steps:

(1) preparing inner layer fibers: blending the rich-strength fibers and the bamboo charcoal fibers to prepare inner layer fibers;

(2) preparing a middle layer fiber: blending the polyimide fiber with the inner layer fiber, wherein the polyimide fiber safely wraps the inner layer fiber, and the yarn count is 16-18Tex to prepare a middle layer fiber;

(3) preparing outer layer fibers: blending meta-aramid, modified spandex, modified polyester and middle-layer fiber, completely wrapping the meta-aramid, modified spandex and modified polyester with the middle-layer fiber, and making the yarn count of 23-25Tex to obtain outer-layer fiber;

(4) weaving: and spinning the outer layer fibers into cloth to obtain the protective clothing fabric.

By adopting the technical scheme, the manufacturing process is simple, and the fabric manufactured by adopting the process is low in cost and suitable for large-scale production.

In a third aspect, the present application provides a protective garment, which adopts the following technical scheme:

protective clothing comprises a heat insulation layer made of the protective clothing fabric.

By adopting the technical scheme, the protective clothing made of the protective clothing fabric is light in weight and good in flame retardance, and the gram weight of the protective clothing with the heat insulation layer made of the protective clothing fabric can be obviously reduced.

In summary, the present application has the following beneficial effects:

1. by using the rich-strength fiber, the bamboo charcoal fiber, the polyimide fiber, the titanium dioxide modified spandex, the white carbon black modified polyester and the meta-aramid fiber in the preferred range of the application to be blended and form a structure coated by an inner outer layer, the prepared fabric has better flame retardance, high temperature resistance and fiber strength under unit gram weight, and a heat insulation layer made of the raw materials in the preferred range has lighter gram weight;

2. the modified spandex is prepared by wet spinning after the titanium dioxide and the polyurethane urea polymer react, the production process is simple, the cost is low, the prepared modified spandex has the advantages of high modulus, high strength and high temperature resistance, the titanium dioxide is good in economy, the cost for producing the modified terylene by the method is low, and the method is suitable for large-scale production;

3. the modified terylene prepared by dry spinning after the white carbon black and the terylene are melted in vacuum has better heat resistance and fiber strength, the cloth blended by the modified terylene has good porosity in fiber, thereby being convenient for the dissipation of sweat and heat, the process for producing the modified terylene is simple, the production efficiency of the modified terylene is high, the economy of the white carbon black is good, the cost for producing the modified spandex by the method is low, and the method is suitable for large-scale production;

4. the modified polyester fiber, the modified spandex, the meta-aramid fiber, the polynosic fiber, the bamboo charcoal fiber and the polyimide fiber are subjected to multiple blending to prepare the modified polyester fiber, the modified spandex, the meta-aramid fiber, the polynosic fiber, the bamboo charcoal fiber and the polyimide fiber, and the preparation method is simple in preparation process, low in production cost and suitable for mass production.

Detailed Description

The present application will be described in further detail with reference to examples.

The raw material components of the invention are shown in the table 1:

TABLE 1 sources of the raw material components

Examples

Example 1

The protective clothing fabric is prepared from the following raw materials in parts by weight: 68kg of meta-aramid, 20kg of titanium dioxide modified spandex, 20kg of white carbon black modified terylene, 13kg of polynosic fiber, 5kg of bamboo charcoal fiber and 13kg of polyimide fiber.

The preparation method of the titanium dioxide modified spandex comprises the following steps:

s1: melting 40kg of spandex in vacuum at 220 ℃, and adding 1.08kg of titanium dioxide;

s2: keeping the temperature of the product in the S1 for 20min, and stirring at 57rpm for 15 min;

s3: and (3) preparing the modified spandex fiber by wet spinning from the product in the S2 at the spinning temperature of 50 ℃ and the spinning speed of 100 m/min.

The preparation method of the white carbon black modified terylene comprises the following steps:

the method comprises the following steps: 1.08kg of white carbon black and 40kg of terylene are uniformly mixed and melted in vacuum at 260 ℃;

step two: keeping the temperature of the product in the step one for 13 min;

step three: and (5) dry spinning the product obtained in the step two at the spinning temperature of 40 ℃ and the spinning speed of 400m/min to obtain the modified polyester fiber, wherein the solvent is a dimethylacetamide solvent.

A preparation method of protective clothing fabric comprises the following steps:

(1) blending the rich-strength fibers and the bamboo charcoal fibers to obtain inner layer fibers;

(2) blending the polyimide fiber and the inner layer fiber prepared in the step (1), wherein the polyimide fiber completely wraps the inner layer fiber, and the yarn count is 18Tex, so as to prepare a middle layer fiber;

(3) blending meta-aramid, titanium dioxide modified spandex and white carbon black modified polyester with the middle-layer fiber prepared in the step (2), completely wrapping the meta-aramid, titanium dioxide modified spandex and white carbon black modified polyester with the middle-layer fiber, and preparing an outer-layer fiber with a yarn count of 25 Tex;

(4) and (4) spinning the outer-layer fibers on a loom to obtain the protective clothing fabric.

Examples 2 to 13

The difference from example 1 is that the respective weights of the raw material components are different, as shown in table 2.

TABLE 2 materials and their weights in examples 1-13

Example 14

The difference from the example 4 is that the addition amount of the titanium dioxide in the S1 is 1.3 kg.

Example 15

The difference from the example 4 is that the addition amount of the titanium dioxide in the S1 is 1.6 kg.

Example 16

The difference from the example 4 is that the addition amount of the titanium dioxide in the S1 is 1.8 kg.

Example 17

The difference from example 14 is that the spinning temperature in S3 was 55 ℃.

Example 18

The difference from example 14 is that the spinning temperature in S3 was 60 ℃.

Example 19

The difference from example 14 is that the spinning temperature in S3 was 65 ℃.

Example 20

The difference from example 17 is that the amount of silica added in the first step is 1.3 kg.

Example 21

The difference from example 17 is that the amount of silica added in the first step is 1.6 kg.

Example 22

The difference from example 17 is that the amount of silica added in the first step is 1.8 kg.

Example 23

The difference from example 20 is that the spinning temperature in step three is 45 ℃.

Example 24

The difference from example 20 is that the spinning temperature in step three is 50 ℃.

Example 25

The difference from example 20 is that the spinning temperature in step three is 55 ℃.

Example 26

The difference from the example 23 is that, in the preparation method, 14kg of the high-tenacity fiber, 6kg of the bamboo charcoal fiber, 13kg of the polyimide fiber, 60kg of the meta-aramid fiber, 17kg of the titanium dioxide modified spandex and 17kg of the white carbon black modified polyester are directly blended.

Comparative example

Comparative example 1: the difference from example 23 is that the polyimide fiber was removed in comparative example 1.

Comparative example 2: the difference from example 23 is that the polyimide fiber of comparative example 2 was added in an amount of 23 kg.

Comparative example 3: the prior high-strength aramid fiber flame-retardant fabric special for the fire-fighting clothing of forest, which is produced by Mingda textile Limited company in Shantou City, is a flame-retardant fabric.

Performance test

From examples 1 to 26 and comparative examples 1 to 3, 3 pieces of cloth of 30cm × 30cm size were randomly taken, one for each 3 pieces, and the following performance test tests were performed on each set of samples, and the three monitored data of each set were averaged.

Test I, thermal stability test

Each sample was prepared into a pattern of a prescribed size by referring to the test method of the thermal stability test of appendix B in GA 10-2014 firefighter fire clothes, and the size change (%) of the patterns in examples 1-26 and comparative examples 1-3 was calculated by examining the pattern and recording the data.

Test two, flame retardant property test

Referring to the test method of the textile burning performance test vertical method in GB/T5455-1997 textile burning performance test vertical method, each sample is prepared into a pattern with a specified size, and the pattern is tested and data is recorded, and the after-burning time(s), smoldering time(s) and damage length (mm) of the patterns in examples 1-26 and comparative examples 1-3 are calculated.

Test III, fiber Strength test

The tenacity (cN/dTex) of the patterns in examples 1-26 and comparative examples 1-3 was calculated according to the "biopolishing treatment of cotton knit fabrics" for the fiber strengths of the patterns in examples 1-26 and comparative examples 1-3 and recording the data.

Test four, mass per unit area

Refer to GA 10-2014 "firefighter extinguishmentMethod for detecting mass per unit area of 7.9 in fire clothes, wherein each sample is prepared into a pattern with a specified size, the pattern is detected and data is recorded, and the mass per unit area (g/m) of the patterns in examples 1-26 and comparative examples 1-3 is calculated²)。

And (3) detection results: the results of examination of the test samples prepared in examples 1 to 26 and comparative examples 1 to 3 are shown in Table 3.

Table 3 type performance test results table

As can be seen by combining examples 1-26 with Table 3, samples made with each of the raw materials in the range of examples 1-26 meet the thermal stability performance requirement of 6.3 in GA 10-2014 "firefighter turnout gear".

Combining examples 1-26 and comparative example 3 with Table 3, it can be seen that the dimensional change rates of examples 1-26 are not very different and are all similar to the dimensional change rate of the conventional flame retardant fabric, and the samples made from the raw materials in the preferred range of the present application have good high temperature resistance.

As can be seen by combining example 23 and comparative examples 1 to 3 with Table 3, the dimensional change rate of the pattern in which the polyimide fibers were not used in the raw material was significantly larger, and the dimensional change rate of the pattern in which the polyimide fibers were excessively used in the raw material was larger, i.e., the samples made with the polyimide fibers in the preferred range of the present application had better high temperature resistance.

As can be seen by combining examples 1-26 with comparative example 3 and by combining Table 3, the smoldering times and the length of failure of examples 1-26 both meet the flame retardant requirements of 6.2 in GA 10-2014 "firefighter turnout gear".

It can be seen from the combination of example 26 and comparative example 3 and Table 3 that the smoldering time and the damage length of the sample made of the raw materials within the preferred range of the present application are similar to those of the existing flame retardant cloth, i.e., the sample made of the raw materials within the preferred range of the present application has the flame retardancy similar to that of the existing flame retardant cloth.

It can be seen from the combination of examples 1 to 3 and comparative example 3 and table 3 that the samples made of the high tenacity fibers and the bamboo charcoal fibers in the preferred range of the present application have the same flame-retardant time, slightly shorter smoldering time and slightly shorter damage length compared with the existing flame-retardant cloth, i.e. the samples made of the high tenacity fibers and the bamboo charcoal fibers in the preferred range of the present application have slightly stronger flame retardancy compared with the existing flame-retardant cloth.

It can be seen from the combination of examples 3 to 7 and comparative example 3 and from Table 3 that the samples made using the polyimide fibers in the preferred range of the present application have the same after flame time, shorter smoldering time and shorter marring length as compared to the conventional flame retardant cloth, i.e., the polyimide fibers in the preferred range of the present application have stronger flame retardancy as compared to the conventional flame retardant cloth.

It can be seen from the combination of example 23 and comparative examples 1 and 2 and table 3 that the smoldering time and the damage length of the sample without using the polyimide fibers in the raw material are longer, and the afterflame time, the smoldering time and the damage length of the sample with using the excessive polyimide fibers in the raw material are the same, the smoldering time and the damage length are longer than those of the conventional flame retardant cloth, i.e. the flame retardancy of the sample without using the polyimide fibers in the raw material is poorer than that of the conventional flame retardant cloth, and the flame retardancy of the sample with using the excessive polyimide fibers in the raw material is slightly poorer than that of the conventional flame retardant cloth.

As can be seen by combining examples 4, 8, 9 and comparative example 4 with table 3, the samples made with the meta-aramid fiber in the preferred range of the present application had shorter smoldering time and length of damage than the existing flame retardant cloth, i.e., the samples made with the meta-aramid fiber in the preferred range of the present application had better flame retardancy than the existing flame retardant cloth.

It can be seen from the combination of examples 4, 10, and 11 and comparative example 4 and the combination of table 3 that the sample prepared by using the titanium dioxide modified spandex in the preferred range of the present application has shorter smoldering time and damage length compared with the existing flame retardant fabric, i.e. the sample prepared by using the titanium dioxide modified spandex in the preferred range of the present application has stronger flame retardancy compared with the existing flame retardant fabric.

It can be seen from the combination of examples 4, 12, and 13 and comparative example 4 and the combination of table 3 that the smoldering time and the damage length of the sample made of the white carbon black modified polyester fiber within the preferred range of the present application are shorter, i.e. the sample made of the white carbon black modified polyester fiber within the preferred range of the present application has stronger flame retardancy.

As can be seen by combining examples 4, 14-16 with Table 3, the samples made with titanium dioxide in the preferred range of the present application have shorter smoldering times and collapse strength; as can be seen by combining examples 14, 17-19 and Table 3, the smoldering time and the damage length of the sample prepared by using the spinning temperature of the spandex modified by the titanium dioxide in the preferred range of the application are shorter; namely, the sample prepared by the technological parameters of the titanium dioxide modified spandex in the optimal range of the application has shorter smoldering time and damage length, and the sample prepared by the technological parameters of the titanium dioxide modified spandex in the optimal range of the application has stronger flame retardance.

As can be seen by combining examples 17, 20-22 with Table 3, the samples made with the white carbon black in the preferred range of the present application had shorter smoldering times and damaged lengths; in combination with examples 20 and 23-25, it can be seen that the smoldering time and the damage length of the sample prepared by the spinning temperature of the white carbon black modified terylene within the preferable range of the application are shorter; namely, the sample prepared by adopting the technological parameters of the white carbon black modified terylene in the optimal range of the application has shorter smoldering time, and the sample prepared by adopting the technological parameters of the white carbon black modified terylene in the optimal range of the application has stronger flame retardance.

It can be seen from a combination of examples 23 and 26 and from Table 3 that the samples produced by the sample production process within the preferred range of the present application have shorter smoldering times and damaged lengths, i.e., the samples produced by the production process within the preferred range of the present application have greater flame retardancy.

It can be seen from the combination of examples 1 to 3, 8 to 13 and comparative examples 1 to 3 and from table 3 that the strength of the sample prepared using the raw materials in the preferred range of the present application is similar to that of the conventional flame-retardant cloth, i.e., the fiber strength of the sample prepared using the raw materials in the preferred range of the present application is similar to that of the conventional flame-retardant cloth.

As can be seen by combining examples 3 to 7 and comparative examples 1 to 3 with table 3, the strength of the sample made of the polyimide fiber in the preferred range of the present application is higher than that of the conventional flame retardant cloth, the strength of the sample made of the polyimide fiber is lower than that of the conventional flame retardant cloth, and the strength of the sample made of the polyimide fiber is lower than that of the conventional flame retardant cloth, that is, the sample made of the polyimide fiber in the preferred range of the present application has higher fiber strength.

By combining examples 4, 14-16 and table 3, it can be seen that the strength of the titanium dioxide in the preferred addition amount range of the present application is higher, and the strength of the sample made of titanium dioxide with too high addition amount is lower; it can be seen from the combination of examples 14, 17-19 and table 3 that the sample prepared in the spinning temperature range after the preferred titanium dioxide modified spandex of the present application has higher strength, and the sample prepared at the excessively high spinning temperature after the titanium dioxide modified spandex has lower strength; namely, the sample prepared by adopting the process parameter range of the titanium dioxide modified spandex optimized in the application has higher fiber strength.

Combining examples 17, 20-22 and table 3, it can be seen that the strength of the white carbon black is higher with the preferred addition amount range of the present application, and the strength of the sample made with the white carbon black with too high addition amount is lower; by combining examples 20, 23-25 and table 3, it can be seen that the sample prepared within the spinning temperature range after the white carbon black modified polyester fiber is adopted has higher strength, and the sample prepared at the excessively high spinning temperature after the white carbon black modified polyester fiber is adopted has lower strength; namely, the sample prepared by adopting the process parameter range of the white carbon black modified terylene optimized in the application has higher fiber strength.

In combination with examples 23 and 26 and in combination with table 3, it can be seen that the samples made using the preferred facing process of the present application have higher strength, i.e. the samples made using the preferred facing process of the present application have higher fiber strength.

Combining examples 1-26 and comparative example 3 and table 3, it can be seen that examples 1-26 all have significantly lower grammage relative to comparative example 3, and examples 1-26 all have approximately 10% less grammage relative to comparative example 3. As can be seen by combining examples 1-26 with Table 3, of the samples having similar dimensional change rates, smoldering times, damaged lengths and strengths, the sample in example 3 had the lightest grammage; the sample in example 20 has the lightest grammage compared to the samples of the flame-retardant cloths currently available, which have shorter times, shorter break lengths and higher strengths.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.