CN110396748B

CN110396748B - High-temperature-resistant yarn, composite fabric and protective fabric

Info

Publication number: CN110396748B
Application number: CN201910714965.XA
Authority: CN
Inventors: 曹丽霞; 丁致家; 钱俊; 丁健梅
Original assignee: Changshu Baofeng Special Fibre Co ltd
Current assignee: Changshu Baofeng Special Fibre Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2021-11-23
Anticipated expiration: 2039-08-05
Also published as: DE202020102589U1; NL2025600B1; CN110396748A

Abstract

A high-temperature-resistant yarn, a composite fabric and a protective fabric belong to the technical field of textiles. The high-temperature resistant yarn comprises a core yarn and an outer covering yarn covering the outer surface of the core yarn. The core yarn comprises any one of basalt filament, polyimide filament, poly-p-phenylene terephthalamide filament and polyaryl oxadiazole filament. The covering yarn is made by blending fibers including a first flame-retardant fiber and a second flame-retardant fiber. The first flame retardant fibers comprise high temperature resistant flame retardant fibers and the second flame retardant fibers comprise high strength flame retardant fibers. The high-temperature-resistant yarn has the advantages that the inner core yarn of the high-temperature-resistant yarn is made of the yarn with high strength, the strength of the high-temperature-resistant yarn can be improved, the high-temperature-resistant yarn is additionally supported by the framework, so that spinning is facilitated, the outer wrapping yarn of the high-temperature-resistant yarn is made of the yarn with high temperature resistance and good flame retardance, the high-temperature-resistant yarn made through the matching of the core yarn and the outer wrapping yarn has high strength, good spinnability and good performance of high temperature resistance and flame retardance.

Description

High-temperature-resistant yarn, composite fabric and protective fabric

Technical Field

The application relates to the technical field of spinning, in particular to high-temperature-resistant yarn, a composite fabric and a protective fabric.

Background

When workers work in the fields of metallurgy, welding and the like, protective clothing needs to be worn to ensure the safety of operation and protect the skin from being burnt.

However, existing protective garments are typically made from pure cotton, cowhide, or pure pre-oxidized silk. The pure cotton protective clothing has high gram weight, heavy wearing, short service life and only one week of average service life; the cowhide protective clothing has higher cost and poor comfort level, cannot be made into complete clothing, and lacks the comprehensive protection on human bodies; the pure pre-oxidized fiber has lower strength, is not beneficial to manufacturing, and the strength of the prepared protective clothing is lower.

Disclosure of Invention

The application provides a high temperature resistant yarn, composite fabric and protective fabric, and it can improve the current not enough problem of protective fabric intensity, is convenient for weave.

The embodiment of the application is realized as follows:

in a first aspect, the present examples provide a high temperature resistant yarn comprising a core yarn and a covering yarn covering an outer surface of the core yarn.

The core yarn comprises any one of basalt filament, polyimide filament, poly-p-phenylene terephthalamide filament and polyaryl oxadiazole filament.

The covering yarn is made by blending fibers including a first flame-retardant fiber and a second flame-retardant fiber.

The first flame retardant fibers comprise one or more of pre-oxidized fiber, glass fiber, carbon fiber, or polybenzimidazole fiber.

The second flame-retardant fiber comprises one or more of poly-p-phenylene terephthamide fiber, polyaryl oxadiazole fiber and polyimide fiber.

In above-mentioned technical scheme, the inside core yarn of high temperature resistant yarn adopts the higher yarn of intensity to make, can improve the intensity of high temperature resistant yarn, for the additional skeleton of high temperature resistant yarn supports to be convenient for weaving, the outsourcing yarn of high temperature resistant yarn adopts the better yarn of high temperature resistant and fire resistance to make, can improve the high temperature resistant and the fire resistance of high temperature resistant yarn, the high temperature resistant yarn who makes through the cooperation of core yarn and outsourcing yarn has high strength, the good performance of high temperature resistant and fire resistance. After the strength of the high-temperature resistant yarn is improved, the spinnability of the high-temperature resistant yarn is enhanced.

The basalt filament, the polyimide filament, the poly-p-phenylene terephthalamide filament and the polyaromatic oxadiazole filament have high strength and high flame retardance and heat resistance, and the core yarn for manufacturing the high-temperature-resistant yarn can improve the strength of the high-temperature-resistant yarn and simultaneously provide certain flame retardance and heat resistance.

The pre-oxidized fiber, the glass fiber, the carbon fiber or the polybenzimidazole fiber is a high-temperature resistant flame-retardant fiber, and the flame resistance of the wrapping yarn can be improved when the wrapping yarn is used for manufacturing high-temperature resistant yarns.

The poly-p-phenylene terephthamide fiber, the polyaryl oxadiazole fiber and the polyimide fiber are high-strength flame-retardant fibers, and the strength of the outer covering yarn can be improved when the poly-p-phenylene terephthamide fiber, the polyaryl oxadiazole fiber and the polyimide fiber are used for manufacturing the outer covering yarn of the high-temperature-resistant yarn.

The first flame-retardant fiber and the second flame-retardant fiber are matched to prepare the outer covering yarn with better strength and flame retardance.

With reference to the first aspect, in a first possible example of the first aspect of the present application, the decomposition temperature of the first flame-retardant fibers is not lower than 600 ℃.

In the above example, the decomposition temperature of the first flame-retardant fiber is not lower than 600 ℃, and the high-temperature resistant yarn prepared by using the first flame-retardant fiber has better high-temperature resistance.

In a second possible example of the first aspect of the present application in combination with the first aspect, the first flame resistant fibers have a chassis oxygen index of not less than 40%.

In the above examples, the limiting oxygen index of the first flame retardant fiber is not less than 40%, which indicates that the flame retardancy of the first flame retardant fiber is better, and the first flame retardant fiber belongs to a flame retardant material, and the flame retardancy of the high temperature resistant yarn prepared by using the first flame retardant fiber is better.

In a third possible example of the first aspect of the present application in combination with the first aspect, the limiting oxygen index of the second flame retardant fiber is not less than 35%.

In the above examples, the limiting oxygen index of the second flame retardant fiber is not less than 35%, which indicates that the second flame retardant fiber has better flame retardancy and belongs to a flame retardant material, and the high temperature resistant yarn prepared from the second flame retardant fiber has better flame retardancy.

In a fourth possible example of the first aspect of the present application in combination with the first aspect, the mass fraction of the first flame retardant fibers in the covering yarn is 50 to 80%, and the mass fraction of the second flame retardant fibers is 20 to 50%.

In the above examples, the outer covering yarn made of the first flame-retardant fiber and the second flame-retardant fiber according to the above mixture ratio has good flame retardancy and strength.

In a second aspect, the present application provides a composite fabric, which is woven by using the high temperature resistant yarn.

In the technical scheme, the composite fabric woven by the high-temperature-resistant yarns has good strength and afterburning property, and can be widely applied to protective clothing and the like.

In a first possible example of the second aspect of the present application in combination with the second aspect, the composite fabric is made by interweaving warp yarns and weft yarns, both of which are made of two strands of high temperature resistant yarn.

In the above example, both the warp and weft yarns are made of two high temperature resistant yarns so that the strength of the warp and weft yarns can be improved to further improve the strength of the composite fabric.

In a third aspect, the present application provides a protective fabric, which includes the above composite fabric, a first aluminum film and a second aluminum film, where the first aluminum film is disposed between the composite fabric and the second aluminum film.

In the technical scheme, the aluminum film is compounded on the composite fabric and can reflect heat, and the durability of the aluminum film can be improved through the combination of the double layers of the aluminum films.

In a first possible example of the third aspect of the present application, in combination with the third aspect, a polyethylene terephthalate or polyurethane film is provided between the first layer of aluminum film and the second layer of aluminum film.

In the above example, the folding resistance and the adhesive strength of the aluminum films are improved by disposing the polyethylene terephthalate or polyurethane film between two aluminum films.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural view of a protective fabric according to an embodiment of the present application.

Icon: 10-protective fabric; 100-composite fabric; 200-a first layer of aluminum film; 300-a second layer of aluminum film; 400-film.

Detailed Description

Embodiments of the present application will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The following specifically describes a high-temperature-resistant yarn, a composite fabric and a protective fabric in the embodiments of the present application:

the application provides a high temperature resistant yarn, which comprises a core yarn and an outer covering yarn covering the outer surface of the core yarn.

Basalt is a basic eruption rock, which is a rock with a compact or foam-like structure formed by cooling and solidifying magma sprayed from volcanoes on the ground surface, and belongs to magma rock. The basalt mainly comprises silicon dioxide, aluminum oxide, iron oxide, calcium oxide, magnesium oxide and a small amount of potassium oxide and sodium oxide, wherein the content of the silicon dioxide is the largest, the content of the silicon dioxide is 45-50%, the sum of the contents of the potassium oxide and the sodium oxide is slightly higher than that of the potassium oxide and the sodium oxide, and the contents of the calcium oxide, the iron oxide and the magnesium oxide are slightly lower than that of the calcium oxide, the iron oxide and the magnesium oxide. The bulk density of the basalt is 2.8-3.3 g/cm³The compact structure has high compression strength which can reach 300 MPa.

The basalt fiber belongs to inorganic fiber, can resist temperature up to 650 ℃, has a limiting oxygen index of more than 68 percent, does not discharge toxic gas, has good heat insulation, does not melt or drip, has high strength and does not have the phenomenon of heat shrinkage.

The limiting oxygen index refers to the volume fraction concentration of oxygen in a polymer or inorganic substance in an oxygen and nitrogen mixture gas when just supporting its combustion, and is an index that characterizes the combustion behavior of a material. The limiting oxygen index can be determined by burning a polymer rod downward under specified conditions using the candle test. It is generally believed that at a limiting oxygen index of 22%, the material can be combusted in air. Expressed as a volume percentage of oxygen.

Polyimide (abbreviated as PI) is a polymer having an imide ring (-CO-N-CO-) in the main chain, and is a special engineering material and has excellent mechanical properties.

The polyimide fiber (PI fiber) has the characteristics of high strength and high modulus, and simultaneously has the performances of high temperature resistance, chemical corrosion resistance, radiation resistance and flame retardance, the limiting oxygen index of the PI fiber is more than 35 percent, the smoke generating rate is low, and the PI fiber belongs to a self-extinguishing material. In addition, the PI fiber also has higher thermal decomposition temperature, the thermal decomposition temperature of the omnidirectional polyimide fiber is about 500 ℃, and the thermal decomposition temperature of the polyimide synthesized by biphenyl dianhydride and p-phenylenediamine is 600 ℃.

Poly-p-phenylene terephthalamide (PPA), also known as aramid 1414 or para-aramid, is a fully para-aramid prepared by condensation polymerization of p-phenylene diamine and terephthaloyl chloride.

The aramid 1414 fibers have the advantages of high breaking strength, high modulus, high temperature resistance, good flame retardance and the like, and the limiting oxygen index of the aramid 1414 fibers is more than 28%.

The aromatic oxadiazole fiber (POD) has the advantages that benzene rings and five-membered oxadiazole rings are alternately arranged on the molecular main chain, the POD fiber has excellent heat resistance, the thermal decomposition temperature of the POD fiber is as high as more than 500 ℃, the limit oxygen index of the POD fiber is more than 30%, and the breaking strength is high.

Basalt fiber, PI fiber, aramid fiber 1414 fiber and POD fiber all have higher heat resistance, fire resistance and strength, and core yarn prepared by adopting any one or more of basalt filament, PI filament, aramid fiber 1414 filament and POD filament has higher heat resistance, fire resistance and strength.

It should be noted that any one or more of the basalt filament, PI filament, aramid 1414 filament, and POD filament including the core yarn in the present application may be made of only the basalt filament, PI filament, aramid 1414 filament, or POD filament, may also be made of the basalt filament and PI filament, may be made of the PI filament and aramid 1414 filament, may be made of the aramid 1414 filament and POD filament, may be made of the PI filament and PAD filament, may also be made of the PI fiber, aramid 1414, and POD fiber, and may be made of the basalt fiber, PI fiber, and aramid 1414 fiber.

The pre-oxidized fiber comprises polyacrylonitrile pre-oxidized fiber, and the polyacrylonitrile pre-oxidized fiber is obtained by using polyacrylonitrile fiber as a raw material and performing high-temperature thermal stabilization treatment. The limiting oxygen index of the pre-oxidized fiber is not lower than 40%, and the pre-oxidized fiber has high temperature resistance and can not be denatured in an environment of 700 ℃.

The glass fiber is an inorganic non-metallic material with excellent performance, is prepared from seven kinds of ores of pyrophyllite, quartz sand, limestone, dolomite, borocalcite and boromagnesite through the processes of high-temperature melting, wire drawing, winding, weaving and the like, has good heat resistance, can not be denatured in an environment of 1000 ℃, and has a limiting oxygen index of not less than 35%.

The carbon fiber is a high-strength high-modulus fiber with the carbon content of more than 90 percent, is prepared by carbonizing acrylic fiber and viscose fiber at high temperature, is high-temperature resistant, can not be deformed in an environment of 1000 ℃, and has the limiting oxygen index of not less than 35 percent.

Polybenzimidazole (PBI) is a benzene five-membered heterocyclic rigid chain polymer containing two nitrogen atoms, and PBI fibers have high temperature resistance and flame retardance, can not be denatured in an environment of 700 ℃, are non-combustible in air and slow to burn in oxygen, and have a limiting oxygen index of not less than 50%.

The pre-oxidized fiber, the glass fiber, the carbon fiber and the PBI fiber have high heat resistance and flame retardance, and the first flame-retardant fiber prepared from any one or more of the pre-oxidized fiber, the glass fiber, the carbon fiber and the polybenzimidazole fiber has high heat resistance and flame retardance.

It should be noted that, in the present application, one or more of the pre-oxidized fiber, glass fiber, carbon fiber and PBI fiber, including the first flame retardant fiber, may be made of only pre-oxidized fiber, glass fiber, carbon fiber or PBI fiber, may also be made of pre-oxidized fiber and glass fiber, glass fiber and carbon fiber, carbon fiber and PBI fiber, pre-oxidized fiber, glass fiber and carbon fiber, glass fiber, carbon fiber and PBI fiber, pre-oxidized fiber, glass fiber, carbon fiber and PBI fiber.

Optionally, the decomposition temperature of the first flame retardant fibers is not less than 600 ℃. The decomposition temperature refers to the decomposition temperature when the temperature of the polymer in a viscous state is further increased to cause the molecular chain degradation to be accelerated, and the temperature is increased to cause the molecular chain degradation of the polymer to be obvious.

The second flame-retardant fiber prepared from any one or more of aramid 1414 fiber, POD fiber and PI fiber has high heat resistance, flame retardance and strength.

Optionally, the limiting oxygen index of the second flame retardant fiber is not less than 35%.

It should be noted that any one or more of the aramid 1414 fiber, POD fiber, and PI fiber including the second flame retardant fiber in the present application may be made of aramid 1414 fiber, POD fiber, or PI fiber, aramid 1414 fiber and POD fiber, POD fiber and PI fiber, aramid 1414 fiber and PI fiber, or aramid 1414 fiber, POD fiber, and PI fiber.

The outer covering yarn prepared by blending the first flame-retardant fiber with higher heat resistance and flame retardance and the second flame-retardant fiber with higher heat resistance, flame retardance and strength has higher heat resistance, flame retardance and strength.

The heat resistance and the flame retardance of the first flame-retardant fiber are higher than those of the second flame-retardant fiber, and the first flame-retardant fiber is mainly used for improving the flame retardance and the heat resistance of the covering yarn; the strength of the second flame-retardant fibers is higher than that of the first flame-retardant fibers, the second flame-retardant fibers are mainly used for improving the strength of the outer covering yarns, meanwhile, the heat resistance and the flame retardance of the second flame-retardant fibers are also better, the heat resistance and the flame retardance of the second flame-retardant fibers cannot be greatly influenced when the second flame-retardant fibers are blended with the first flame-retardant fibers, the flame retardance and the heat resistance of the prepared outer covering yarns are still excellent, and the strength is improved.

The inner core yarn of the high-temperature-resistant yarn is made of the yarn with higher strength, the strength of the high-temperature-resistant yarn can be improved, the high-temperature-resistant yarn is additionally supported by a framework, so that spinning is facilitated, the outer wrapping yarn of the high-temperature-resistant yarn is made of the yarn with higher high temperature resistance and flame retardance, the high-temperature-resistant yarn of the high-temperature-resistant yarn can be improved in high temperature resistance and flame retardance, and the high-temperature-resistant yarn made through the matching of the core yarn and the outer wrapping yarn has high strength and good performance of high temperature resistance and flame retardance. After the strength of the high-temperature resistant yarn is improved, the spinnability of the high-temperature resistant yarn is enhanced.

The heat resistance and the flame retardance of the outer covering yarn are higher than those of the inner core yarn, and the outer covering yarn is mainly used for improving the flame retardance and the heat resistance of the high-temperature-resistant yarn; the strength of the inner core yarn is high compared with that of the outer covering yarn, the inner core yarn is mainly used for improving the strength of the high-temperature-resistant yarn, the heat resistance and the flame retardance of the inner core yarn are good, when the outer covering yarn and the inner core yarn are made into the high-temperature-resistant yarn, the heat resistance and the flame retardance of the high-temperature-resistant yarn cannot be greatly influenced, the flame retardance and the heat resistance of the made high-temperature-resistant yarn are excellent, and the strength is improved.

The mass fraction of the first flame-retardant fibers in the covering yarns is 50-80%, and the mass fraction of the second flame-retardant fibers is 20-50%. The outsourcing yarn prepared from the first flame-retardant fiber and the second flame-retardant fiber according to the proportion has good flame retardance and strength.

It should be noted that the outer wrapping yarn in the application does not contain viscose or flame-retardant viscose, although the flame-retardant viscose has enough flame retardancy, the flame-retardant viscose has poor high temperature resistance, and the flame-retardant viscose deforms and becomes brittle at 500 ℃ or above in the external environment, so that the cloth made of the outer wrapping yarn is broken, and the high temperature resistance of the cloth is affected.

The high-temperature resistant yarn is spun by adopting the following process:

selecting any one or more of basalt filament, PI filament, aramid 1414 filament and POD filament as core yarn, wherein the filament number is 50-100D;

the outer covering yarn is a short fiber mixture, one or more of pre-oxidized fiber, glass fiber, carbon fiber and PBI fiber is selected as first flame-retardant fiber, and any one or more of aramid 1414 fiber, POD fiber and PI fiber is selected as second flame-retardant fiber;

short fibers of the first flame-retardant fibers and the second flame-retardant fibers are used as raw materials, and the mass ratio of the first flame-retardant fibers to the second flame-retardant fibers is 50-80: 20-50, mixing, opening and blowing, carding on a flat card to obtain wool tops of 4.5g/10m, drawing, adopting 8 three-pass drawing, and obtaining covering yarns with the drawing ration of 7.5g/10 m;

carrying out a core-covering process on the outer covering yarn and the core yarn filament to obtain the high-temperature-resistant yarn: feeding the drawn roving into a roving machine, wherein the roving twisting direction is Z twisting; controlling the twist number to be 85 twists/10 cm, controlling the yarn count to be 18-28S single-strand yarn through a core-spun process, then doubling 2 strands, controlling the twist number to be 70 twists/10 cm, wherein the twist direction is S twist;

the weight ratio of the core yarn to the outer covering yarn is 15-40: 85-60.

The change of the spinning process is adjusted according to the fiber characteristics, and the change of the roller position is to ensure the control force on the fiber and improve the yarn quality; the speed is reduced to avoid generation of static electricity and the like.

The application also provides a composite fabric which is made by weaving the high-temperature-resistant yarns. The composite fabric has good strength and re-combustion performance, and can be widely applied to protective clothing.

The composite fabric is made by interweaving warp yarns and weft yarns, and both the warp yarns and the weft yarns are made of two strands of high-temperature-resistant yarns. The warp and the weft are both made of two high-temperature-resistant yarns, so that the strength of the warp and the weft can be improved, and the strength of the composite fabric can be further improved.

The composite fabric is woven by adopting the following process: adopting twill or variable twill weave, selecting a rapier loom to weave, wherein the loom tension is 15-20N, the speed is 250-350 r/min, and the gram weight is 180-500 g/m²。

Optionally, 3/1 or 2/2 twill weave is adopted, and the gram weight is 240-320 g/m²。

The woven composite fabric is subjected to the following post-finishing process: the gray fabric obtained by weaving is introduced into a can steamer in the form of a cloth roll. The fabric is pre-shrunk by a high-temperature airflow mode by adopting a bidirectional variable-speed air jet device. And then introducing the mixture into a setting machine, and adopting a direct dry heat setting mode, wherein the speed is 30-60 m/min, the temperature is 120-180 ℃, and an overfeeding mode is adopted.

The bidirectional variable-speed jet airflow device is better than a common spring reset device, the air volume of an air path can be reduced, and the retardation coefficient of the main nozzle to the air path is reduced. The direct dry heat setting process is adopted, so that the weakness of low strength is avoided, and the strength of the cost is kept equal to or slightly increased compared with a theoretical value. The overfeeding process can ensure that the fabric has good dimensional stability, and the process mainly ensures that the fabric has good style and quality and ensures the smoothness of the fabric surface while ensuring the strength.

Referring to fig. 1, the present application further provides a protective fabric 10, which includes the composite fabric 100, a first aluminum film 200 and a second aluminum film 300, wherein the first aluminum film 200 is disposed between the composite fabric 100 and the second aluminum film 300.

The aluminum film is compounded on the composite fabric and can reflect heat, the high temperature resistance of the composite fabric is improved, the durability of the aluminum film can be improved through the combination of the double layers of the aluminum films, and the composite fabric 100 can not be denatured in an environment of 1000 ℃. A Polyethylene terephthalate (PET) or Polyurethane (PU) film 400 is disposed between the first aluminum film 200 and the second aluminum film 300.

The method for compounding the aluminum film to the composite fabric comprises the following steps:

compounding a first aluminum film layer in a hot melting and laminating mode: heating and melting high-temperature resistant PU (polyurethane) by a wet solidification method to generate cross-link reaction, injecting the cross-link reaction into a glue groove, extruding the glue into a hole of a rotating engraving roller, transferring the glue in the hole to an aluminum film in a pressurizing mode, and combining the aluminum film and the fabric through pressing of a composite roller.

Compounding the second aluminum film layer by a thermal transfer compounding process: and coating a PU (polyurethane) or PET (polyethylene terephthalate) film on the first layer of the compounded aluminum film, and then attaching the second layer of the aluminum film to the upper surface of the first layer of the compounded aluminum film.

The following provides a detailed description of the high temperature resistant yarn, the composite fabric and the protective fabric.

Example 1

The embodiment of the application provides a high-temperature-resistant yarn, a composite fabric and a protective fabric.

The high-temperature-resistant yarn comprises a core yarn made of PI filaments, an outer covering yarn made of pre-oxidized filament short fibers with the mass fraction of 70% and aramid fiber 1414 short fibers with the mass fraction of 30%, wherein the mass ratio of the core yarn to the outer covering yarn is 25: 75 are woven.

A composite fabric is made of high-temperature-resistant yarns.

The protective fabric comprises a composite fabric, a first aluminum film layer and a second aluminum film layer, wherein the first aluminum film layer is arranged between the composite fabric and the second aluminum film layer, and a PET film is arranged between the first aluminum film layer and the second aluminum film layer.

Example 2

The high-temperature-resistant yarn comprises a core yarn made of aramid 1414 filaments and POD filaments in a mixed mode, and an outer covering yarn made of 40 mass percent of glass fibers, 40 mass percent of carbon fibers, 10 mass percent of POD short fibers and 10 mass percent of PI short fibers is characterized in that the mass ratio of the core yarn to the outer covering yarn is 15: 85 are obtained by weaving.

A composite fabric is made of high-temperature-resistant yarns.

Example 3

A high-temperature-resistant yarn comprises a core yarn made of basalt filaments, an outer covering yarn made of PBI short fibers with the mass fraction of 50%, POD short fibers with the mass fraction of 20% and aramid 1414 short fibers with the mass fraction of 30%, wherein the mass ratio of the core yarn to the outer covering yarn is 40: 60 are obtained by spinning.

A composite fabric is made of high-temperature-resistant yarns.

Example 4

The high-temperature-resistant yarn comprises a core yarn made of aramid 1414 filaments and POD filaments, PBI short fibers with the mass fraction of 60%, POD short fibers with the mass fraction of 20%, aramid 1414 short fibers with the mass fraction of 10% and PI short fibers with the mass fraction of 10%, wherein the mass ratio of the core yarn to the outer covering yarn is 30: 70 spinning to obtain the textile.

A composite fabric is made of high-temperature-resistant yarns.

Comparative example 1

The application provides a high-temperature-resistant yarn, a composite fabric and a protective fabric.

The high-temperature-resistant yarn comprises a core yarn made of PI filaments, and an outer covering yarn made of aramid 1414 short fibers, wherein the mass ratio of the core yarn to the outer covering yarn is 25: 75 are woven.

A composite fabric is made of high-temperature-resistant yarns.

Comparative example 2

The high-temperature-resistant yarn comprises a core yarn made of PI filaments, and an outer covering yarn made of pre-oxidized staple fibers, wherein the mass ratio of the core yarn to the outer covering yarn is 25: 75 are woven.

A composite fabric is made of high-temperature-resistant yarns.

Comparative example 3

A composite fabric is made of high-temperature-resistant yarns.

A protective fabric comprises a composite fabric and an aluminum film.

Test example 1

Flame retardant protective part 2 of protective garments according to GB8965.2, respectively: the results of the measurements of the welding garment and the protective garments made from the protective face fabric of examples 1-4 according to the ISO 11612 standard are shown in table 1:

TABLE 1 GB8965.2 and ISO 11612 Standard measurement results

Test example 2

Protective garments made from the protective fabrics of example 1 and comparative examples 1-3 were measured for warp break strength, weft break strength, warp tear strength, weft tear strength, afterflame time, smoldering time, length of damage, aluminum and iron resistance rating, and the results are shown in table 2:

table 2 strength and flame retardant test results

As can be seen from comparison between comparative example 1 and example 1, the covering yarn in comparative example 1 has no first flame-retardant fiber, the smoldering time of the protective clothing made of the covering yarn reaches 1.2s, the damage length reaches 36mm, the aluminum and iron prevention grades only reach D2 and E2, and are lower than the D3 and E3 grades of example 1, which shows that the flame retardance and the high temperature resistance of the protective fabric in comparative example 1 are poorer than those of the protective fabric in example 1.

As can be seen from comparison between comparative example 2 and example 1, the second flame retardant fiber is not included in the covering yarn in comparative example 2, and the protective clothing made of the covering yarn has poor warp breaking strength, weft breaking strength, warp tearing strength and weft tearing strength, which indicates that the protective clothing has poor strength, is not woven well during spinning, and has a large number of yarn knots.

As can be seen from comparison between comparative example 3 and example 1, the protective fabric in comparative example 3 only has one aluminum film, and the aluminum-proof and iron-proof grades of the protective garment made of the protective fabric only reach D2 and E2, which are lower than the grades of D3 and E3 in example 1, which shows that when the protective fabric only has one aluminum film, the radiation and heat-proof effects are not as good as those of the two aluminum films in example 1, and the high temperature resistance and flame retardance are not as good as those of the two aluminum films in example 1.

To sum up, the inside core yarn of a high temperature resistant yarn of this application embodiment adopts the higher fire resistance yarn of intensity to improve the intensity of high temperature resistant yarn, for the additional skeleton of high temperature resistant yarn supports, and the outsourcing yarn of surface adopts the high temperature resistance yarn of high temperature resistance to improve the high temperature resistance of high temperature resistant yarn, and the high temperature resistant yarn that makes through the cooperation of core yarn and outsourcing yarn has high strength, and the spinnability is good, the performance that high temperature resistance and fire resistance are good. The composite fabric is woven by the high-temperature-resistant yarns, has good strength and afterburning property, and can be widely applied to protective clothing and the like. The utility model provides a protective fabric, its includes above-mentioned composite fabric, first layer aluminium membrane and second floor aluminium membrane, and first layer aluminium membrane sets up between composite fabric and second floor aluminium membrane, and the protective clothing that adopts this protective fabric to make is not only heat resistance, fire resistance and intensity better to the durability is good, easy spinning.

The foregoing is illustrative of the present application and is not to be construed as limiting thereof, as numerous modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The protective fabric is characterized by comprising a composite fabric, a first aluminum film and a second aluminum film, wherein the first aluminum film is arranged between the composite fabric and the second aluminum film;

a polyethylene terephthalate or polyurethane film is arranged between the first layer of aluminum film and the second layer of aluminum film;

the composite fabric is prepared by interweaving warp yarns and weft yarns, wherein the warp yarns and the weft yarns are both prepared from two strands of high-temperature-resistant yarns, and each high-temperature-resistant yarn comprises a core yarn and an outer covering yarn covering the outer surface of the core yarn;

the core yarn comprises any one of basalt filament, polyimide filament, poly-p-phenylene terephthalamide filament and polyaryl oxadiazole filament;

the covering yarn is made by blending fibers including a first flame-retardant fiber and a second flame-retardant fiber;

the first flame retardant fibers comprise one or more of pre-oxidized fiber, glass fiber, carbon fiber or polybenzimidazole fiber;

the second flame-retardant fiber comprises one or more of poly-p-phenylene terephthamide fiber, polyaryl oxadiazole fiber and polyimide fiber;

the mass fraction of the first flame-retardant fibers in the covering yarns is 50-80%, and the mass fraction of the second flame-retardant fibers is 20-50%;

the decomposition temperature of the first flame-retardant fiber is not lower than 600 ℃.

2. The protective fabric of claim 1, wherein the first flame resistant fibers have a limiting oxygen index of not less than 40%.

3. The protective fabric of claim 1, wherein the limiting oxygen index of the second flame resistant fibers is not less than 35%.