JP2969055B2 - Non-combustible fabric and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-combustible fabric using a fiber obtained by coating a fluororesin on the surface of a bulky processed yarn made of heat-resistant fiber such as glass fiber, and a method for producing the same.
More specifically, the present invention relates to a fabric which is soft and comfortable and has excellent nonflammability and a method for producing the same.

[0002]

2. Description of the Related Art Many noncombustible materials have been developed and put on the market according to their uses. For example, building materials,
Non-combustible materials have been developed in a wide range of fields in response to demands for safety or reliability in disaster prevention, such as interior materials, electric wire coating materials, tent film materials, and industrial materials. Against this background of changing lifestyles and market needs, the interior and interior materials of skyscrapers, hospitals and nursing homes,
Vehicle interior materials such as Shinkansen are not only nonflammable, but also restrict smoke emission, do not emit toxic gas, original interior characteristics, texture, feel when touched by people, etc.
Many properties have been required.

Hitherto, a technique of impregnating or coating a heat-resistant fiber with a fluororesin has been known. Filaments, twisted yarns, spun yarns and the like are impregnated and coated with a fluororesin to improve antifouling properties, chemical resistance, and sewing properties. Yarns with improved UV resistance and the like are commercially available. Further, a manufacturing method thereof has been proposed in Japanese Patent Publication No. 4-016339. In these methods, twisted or bundled filaments are coated with a fluororesin liquid, for example, polytetrafluoroethylene resin (P
Continuously immersed in an aqueous dispersion of TFE resin), and then remove the excess fluororesin liquid with a doctor blade, squeezing roll or die, etc., control the amount of fluororesin deposited, then dry and bake A method of performing heat treatment in a furnace and continuously winding the same is employed.

[0004]

However, those which can satisfy these advanced requirements comprehensively have not yet been realized. Interior fabrics made of glass fiber, carbon fiber, or the like are considered to be capable of satisfying the nonflammability characteristics, but characteristics such as texture, touch and color touched by hand are far from required characteristics. These interior materials, especially made of glass fiber, are not able to fulfill the required properties in terms of abrasion resistance, coloring, cleaning properties, etc., as well as allergic discomfort when the skin comes into contact with itching and tingling The defect that gives is fatal as an interior material.

Further, in the case of bulky yarn (bulky yarn), if a fluororesin solution is impregnated and coated by a conventional method, and excess adhering liquid is removed only with a squeezing roll or a doctor blade, the processed yarn is crushed and loses bulkiness. After that, since it is heated and dried and baked in the same shape, the baked coated fiber becomes flat or hard,
There is a problem that the shape becomes irregular and the original bulkiness and texture are lost. The state in which the bulkiness is lost is also greatly affected by the amount of the adhered fluororesin, and as the amount of adhesion increases, there is a problem that the bulkiness and texture are also lost, and the fibers become harder and cannot be used as fibers.

In order to solve the above-mentioned conventional problems, the present invention relates to a fabric using a fiber in which the surface of a filament yarn made of a heat-resistant long fiber is coated with a fluororesin, which is smokeless and has a tingling sensation on the skin. It is an object of the present invention to provide a non-combustible fabric having no discomfort such as cleaning properties, excellent properties such as cleanability, color and texture, and a method for producing the same. Further, in addition to the above object, the present invention provides a method of using a bulky processed yarn of a heat-resistant long fiber to improve its bulkiness (bulky property).
The present invention provides a non-combustible fabric having a baked layer of a fluororesin on its surface without losing its properties and a method for producing the same.

[0007]

In order to achieve the above object, a non-combustible fabric of the present invention is a fabric using a fiber in which the surface of a heat-resistant long fiber is coated with a fluororesin, and the fabric is unfired. And no ignition or flame in the combustion flame test of ethyl alcohol, and no or little smoke.

[0008] In the above structure, it is preferable that the unsintered fluororesin is present at a substantially central portion when viewed from the cross-sectional direction of the heat resistant fiber. This is for giving a soft texture and eliminating discomfort such as tingling on the skin.

In the above structure, it is preferable that the adhesion ratio of the fluororesin is in the range of 5 to 70% by weight calculated by the above equation (Equation 1). This is because the antifouling property of the fluororesin is exhibited.

In the above construction, the heat-resistant long fiber is made of glass fiber, polyimide fiber, aromatic polyamide fiber,
It is preferably at least one fiber selected from carbon fibers. This is because these fibers have excellent heat resistance. In particular, inorganic fibers such as glass fibers are preferable.

[0011] In the above structure, the heat-resistant long fiber is preferably a bulky processed yarn. This is because it has bulkiness and can give a soft texture. Further, in the above configuration, the fabric is preferably at least one selected from a woven fabric, a knitted fabric, and a nonwoven fabric. This is because it is easy to use as interior material.

Next, the method for producing a non-combustible fabric of the present invention is a method for producing a fabric using a fiber in which the surface of a heat-resistant long fiber is coated with a fluororesin. Impregnated, a predetermined amount of a fluororesin dispersion liquid is applied thereto, and then heat-treated so that at least a part of the fluororesin is unfired, and then a fiber coated with the fluororesin containing the unfired component is formed on a fabric. After that, at least one surface of the cloth is subjected to a heat-and-smoke-free treatment. In the above, the predetermined amount is preferably in the range of 5 to 70% by weight calculated by the above formula (Equation 1).

In the above construction, after the heat-resistant long fibers are impregnated with a dispersion containing a fluororesin, the long fibers adhering to the fluororesin are squeezed out, and then the excess adhesion of the dispersion is removed using wind pressure. Is preferred. This is because the fluororesin can be uniformly applied to the heat-resistant long fiber, and the texture can be prevented from being impaired. In the above, as a means for squeezing the fluororesin-attached long fibers, for example, a doctor knife, a doctor roll, or the like can be used.

[0014] In the above structure, it is preferable that the suction means is a method of removing the excess adhesion of the dispersion liquid containing the fluororesin using the wind pressure. This is because the fluororesin can be more uniformly applied to the heat-resistant long fiber, and the texture can be prevented from being impaired.

In the above structure, it is preferable that after forming a fiber coated with a fluororesin containing an unsintered component into a fabric, the organic component in the fabric is evaporated or decomposed at a high temperature using a heating roll. In order to effectively remove organic components such as oils used during fabric formation, and to keep the texture of the fluororesin in the unbaked state of the fabric in a non-baked state, at the same time to eliminate discomfort such as tingling on the skin That's why. By performing this process, it is possible to eliminate or minimize the generation of smoke in the subsequent combustion test. When completely baked, the texture becomes hard and crisp, giving a discomfort such as a tingling sensation to the skin.

Further, in the above structure, the fluororesin is
Polytetrafluoroethylene resin (PTFE resin), tetrafluoroethylene-hexafluoropropylene copolymer (FEP resin), tetrafluoroethylene-perfluorovinyl ether copolymer (PFA resin), polyvinylidene fluoride (PVDF resin), ethylene- It is preferably at least one selected from a tetrafluoroethylene copolymer (ETFE resin) and an ethylene-chlorotrifluoroethylene copolymer (ECTFE resin). This is because the antifouling property of the fluororesin is exhibited. It is more preferable to include a silicone resin in the fluororesin raw material (aqueous dispersion) in terms of flexibility. Also, by adding various pigments to the fluororesin raw material (aqueous dispersion), colorful fluororesin-coated fibers can be produced.

[0017]

The non-combustible fabric of the present invention uses a heat-resistant long fiber whose surface is coated with a fluororesin. The fabric contains an unfired fluororesin, and is ignited and ignited in a combustion test of ethyl alcohol. Since there is no flame and no or little smoke, it is possible to realize a non-combustible fabric that is smoke-free, has no discomfort such as a tingling sensation on the skin, and has excellent properties such as cleaning property, color, and texture. . Furthermore, when a bulky processed yarn of heat-resistant long fiber is used, a non-combustible fabric having a fired layer of a fluororesin on its surface can be realized without losing its bulkiness (bulky property).

Next, according to the method for producing a non-combustible fabric of the present invention, a dispersion containing a fluororesin is impregnated with heat-resistant long fiber, a predetermined amount of a dispersion of the fluororesin is adhered, and then at least one of the fluororesin is dispersed. Heat treatment so that the part is unfired,
Next, a fiber coated with the fluororesin containing the unsintered component is formed into a fabric, and then at least one surface of the fabric is subjected to a heat-smokeless treatment, whereby the non-combustible fabric of the present invention is efficiently and reasonably obtained. Can be manufactured.

Further, the non-combustible fabric of the present invention and the method for producing the same have the following effects. (1) Irritation to the skin is reduced by making the fluororesin unfired. This is because when a glass fiber is coated with a fluororesin and completely baked, in the case of a glass filament having a diameter of about 5 to 6 μm, the multifilament is coated as one bundle, so that it is felt uncomfortable when touched by hand. (2) In a completely unfired state, a large amount of smoke is generated, and it is not practical in terms of cleaning properties and texture. (3) When heat treatment is performed using a hot roll, the amount of smoke generated can be suppressed, and the surface in contact with the roll surface is smooth and has little fluff. And abrasion fastness are improved. (4) Fluororesin coating can be performed by suction removal without impairing the feel of the bulky yarn. (5) Fluororesin coating containing unfired components in long fibers
Various optimum conditions can be created by setting the temperature of the firing device, the processing speed of the fiber, the adhesion rate of the fluororesin, and the like. (6) In the heat treatment by the heating roll, necessary optimum conditions can be obtained by changing settings such as the roll temperature, the passing speed, and the pressing force of the pressure roll.

[0020]

EXAMPLES The non-combustible fabric and the production method of the present invention will be described more specifically with reference to examples. FIG. 1 is an example of a manufacturing process of a coating process of a bulky yarn used in the present invention with a fluororesin. In FIG. 1, a bulky processed yarn G of glass fiber is unwound from a wound package 1,
After passing through 3, 4, and 5, it is guided and immersed in a guide roll 8 existing in a dispersion liquid 7 containing a fluororesin. The dispersion liquid 7 containing the fluororesin is stored in the tank 6, and the amount of the dispersion liquid 7 attached to the bulky processed yarn G and reduced is supplied from the supply tank 9 a through the supply line 9 b. The bulky processed yarn G of glass fiber immersed in the dispersion liquid 7 containing a fluororesin
Raised towards 5. Then, the surface of the glass yarn to which the fluororesin is adhered is made to follow the doctor roll 28, and excess fluororesin is adhered and removed. Next, in the vacuum zone 10, the excess adhesion of the fluororesin dispersion liquid is removed by wind pressure due to suction force. The vacuum zone 10 is connected to a vacuum pump 11a and a vacuum line 11b. Vacuum zone 1
Numeral 0 is formed of a wire mesh, a mesh plate having pores, a pipe having slit holes, or the like, so that the bulky thread G of glass fiber passes through the outside or inside.
Thereby, the adhesion rate of the fluororesin is controlled in the range of 5 to 70% by weight.

In the above, by squeezing using the doctor roll 28, the surplus amount of the adhered fluororesin is removed.
Since this can be returned to the impregnation tank, the production cost can be reduced. After the squeezing, the excess adhesion of the dispersion is further removed by using suction force in the vacuum zone 10. At this time, since the wind pressure is used, the bulkiness (bulky property) of the fluororesin-attached filament is increased. Can hold. That is, even if the apparent bulkiness is reduced in the first drawing step, the bulkiness is recovered in the wind pressure treatment step.

Next, the glass fiber bulky processed yarn G is dried in the yarn passage hole 14 of the drying zone A. In the drying zone A, for example, a heater 13 is embedded in a hot plate 12,
Temperature by the temperature controller T ₁ 25 100~30
It can be adjusted in the range of 0 ° C.

Next, the glass fiber bulky processed yarn G is dried.
Is fired in firing zone B. Baking zone B can be adjusted to a range of temperature 700 ° C. by the temperature controller T ₀ 27. Incidentally, in the boundary portion of the firing zone B and the drying zone A is provided with a temperature controller T ₂ 26, controlled in a range of, for example, temperature two hundred and eighty to four hundred fifty ° C.. Optimal conditions can be set for the set temperature in each zone from drying to firing, depending on the passing speed of glass fibers passing through each zone, the number of glass fibers to be supplied, the amount of adhesion, and the like. Since gas is generated from the yarn passage hole 14, the gas is exhausted by the exhaust fan 24. An important point in the firing zone B is that the heat treatment is performed so that at least a part of the fluororesin is not fired. This is because the texture becomes coarse and hard as described above when completely baked, and the fluororesin falls off when it is not completely baked and cannot exhibit antifouling properties. For these controls, optimal conditions or optimal quality can be set by changing the temperature of the firing zone or the processing temperature of the glass fiber.

The glass fiber bulky processed yarn G coated with the fluorinated resin by firing as described above is
6, 17, 18 and 19 and the tension roll 20, and are taken up by take-up rollers 21 and 22 and a take-up roller 23. FIG. 1 shows an example of processing using one glass fiber bulky processed yarn G for easy explanation, but in practice, a plurality of, for example, about 30 to 150, processed in parallel. Is preferred.

The heat-resistant long fiber, for example, a bulky processed yarn of glass fiber can be obtained by placing a glass filament yarn in a high-speed turbulent airflow by an air jet according to a known method and forming a crimp on each fiber. The bulkiness is
It can be controlled by changing the number of crimps applied during a fixed length. These bulky yarns have excellent properties such as heat insulating properties, flexibility or resin impregnating properties, or texture and decorativeness as a fabric, and are used in aircraft and vehicle interior materials that require heat resistance, nonflammability, etc. Used in

The fiber coated with the fluororesin containing the unsintered component obtained as described above is formed on a fabric. The fabric is selected from a woven fabric, a knitted fabric, and a nonwoven fabric, and is formed by a known method. For example, a known weaving machine is used for a woven fabric, a known knitting machine is used for a knitted fabric, and a needle punch is used for a nonwoven fabric. In the above, after being formed on a woven or knitted fabric, organic components such as minute oil components (surfactants) contained therein become smoke-generating substances, so that a smokeless treatment is required.

Next, FIG. 2 shows the steps of one embodiment in which at least one surface of the fabric obtained as described above is subjected to a heat- and smokeless treatment. In FIG. 2, 31 is a heating roll, 32 is a nip roll, 30 is a supply fabric, and 33 is a fabric after the heat treatment. As the heating roll 31, for example, a diameter 40
It can be heated to about 200 ° C to 500 ° C with a 0 mm metal roll. By passing the fabric at a rate of about 1 m / min to 5 m / min, smokelessness is achieved, and at the same time, the fluororesin is baked on the surface where the fabric comes into contact with the heating roll 31. However, the inside of the fabric and the portion not in contact with the heating roll 31 remain as an incompletely fired portion.

Next, FIG. 3 shows another embodiment in which the fabric is subjected to a heating and smokeless treatment. In FIG. 3, the cloth 30 supplied from the supply roll 34 passes through a guide roll 35, and is subjected to a heat treatment while being pressed by a heating roll 31 and a nip roll 32.
, And is wound on a winding roll 37.

Next, FIG. 4 shows another embodiment in which the fabric is heated and smokeless treated. In FIG. 4, the cloth 30 supplied from the supply roll 34 passes through the guide roll 35, and is heat-treated while being pressed by the heating roll 31 and the nip roll 32.
, And is wound on a winding roll 37.

Next, FIG. 5 shows a method of a combustion test used in the following Examples and Comparative Examples. This combustion test conforms to the flammability standard for railway vehicle materials specified by the Railway Business Act. In FIG. 5, reference numeral 41 denotes a base of a measuring instrument, reference numeral 42 denotes an inclined holder for holding a test material at an angle of 45 °, reference numeral 43 denotes an arm for mounting an alcohol container, and reference numeral 44 denotes a holder for mounting an alcohol container. Cork stand,
45 is an ethyl alcohol iron container, 46 is a flame, and 50 is a test material (cloth). The test material (fabric) 50 is B5 size (1
(82 mm × 257 mm) and is held at an angle of 45 ° by the inclined holder 42. The ethyl alcohol is placed on the cork table 44 having low thermal conductivity such that the center of the bottom of the iron-made iron container 45 is located 25.4 mm (1 inch) vertically below the center of the lower surface of the test material (fabric) 50. Place the container 45 made of alcoholic iron. Then, 0.5 cc of pure ethyl alcohol is put in, ignited, and left until the fuel is burned out. The flammability judgment is divided into the combustion of alcohol and after the combustion, and during the combustion, the ignition of the test material, the ignition, the smoke state, the state of the flame, etc. are observed, and after the combustion, the after-flame, residual dust, carbonization, Investigate the deformation state. In addition, the pre-test treatment of the test material is performed by avoiding direct sunlight in a ventilated room and leaving it at least 1 m from the floor surface for 5 days or more. The flammability determination standard is as shown in Table 1.

[0031]

[Table 1]

Hereinafter, the present invention will be described in more detail with reference to specific examples and comparative examples. (Example 1) 222 with ECDE75 1 / 2-3.8S
Tex (ECDE75 1/2 is a variety symbol of the glass fiber industry, E is alkali-free glass, C is a long fiber, DE is a filament diameter of 6 μm), 75 is a display of strand, 1
/ 2 means the number of strands of the twisted yarn, 3.8S means 3.8 times S twist per inch. The same applies hereinafter. A) bulky yarn (bulk-processed yarn) obtained by subjecting the glass filament yarn of (1) to crimping 25 times in 10 cm intervals was used as a raw yarn.

This glass yarn was processed by the manufacturing process shown in FIG. First, PTFE resin (Asahi Glass Co., Ltd. AD)
1) The specific gravity of the aqueous dispersion is 1.102 g /
Adjusted to be cc. The glass bulky yarn was immersed in the PTFE resin dispersion aqueous solution. Then, before entering the drying zone and before entering the vacuum zone, the surface of the glass yarn on which the fluororesin was adhered was moved along a doctor roll to remove extra fluororesin adhering. Thereafter, over the portion having a length of 10 to 15 mm, the surface of the PTFE-impregnated yarn was sucked at a wind speed of 8 m / sec to remove excess dispersion and at the same time adjust the amount of adhesion. Next, the drying zone temperature is 280 ° C.
(Residence time: about 7 seconds), and the fluororesin was fired at a firing zone temperature of 500 ° C. (residence time: about 4 seconds). These series of processes were continuously performed at a linear speed of 30 m / min. The deposited amount of the PTFE resin after firing was 25.8% by weight, and the PTFE resin was almost uniformly deposited. The glass yarn was impregnated and fired by impregnation with a PTFE resin, and the bulky glass yarn was in a state in which the constituent monofilament filaments were spread, that is, not agglomerated. In addition, the bulkiness was maintained, and a soft and bulky yarn having a good texture was obtained in the sensory test.

The outermost layer of the glass yarn impregnated and coated with the PTFE resin is in a state in which PTFE is slightly fired, and when the inside of the glass yarn is observed with a stereoscopic microscope, it can be seen that the glass yarn is completely fired. It was confirmed that the unfinished unfired fluororesin was impregnated. When the fluororesin is completely baked, it becomes a transparent film state, but in an unfired state, an opaque portion or a particle state remains. Observation with the stereomicroscope revealed that opaque portions and particle states remained.

Using this fluororesin-coated glass fiber, a plain weave fabric having a width of 110 mm was produced with a weave structure of 16 yarns / inch as a warp (warp) and 14 yarns / inch as a weft (weft). Thereafter, the woven fabric was supplied to the heating roll shown in FIG. 3 and heat treatment was performed. Heat treatment was performed at a hot roll surface temperature of 400 ° C. and a processing speed of 1 m / min. This woven fabric was rich in flexibility and texture, and it was possible to complete the woven fabric without itching or tingling when touched by hand. Furthermore, the surface of the woven fabric that is in contact with the surface of the heating roll during the above heat treatment becomes smooth, and at the same time, the fluff of the glass fiber that has appeared on the woven fabric surface is also suppressed. And improved non-combustible fabrics.

When the heat-treated fabric was subjected to a combustion test by the method shown in FIG. 5, there was no ignition or ignition, there was almost no generation of smoke, and visual confirmation was impossible. That is, it was nonflammable.

(Comparative Example 1) Fluororesin-coated glass fibers were produced under the same conditions as in Example 1 except that the speed at which the glass fibers continuously passed through the drying zone and the firing zone was 23 m / min. This glass fiber is slightly harder than that of Example 1, and when the surface and the inner surface are observed with a stereoscopic microscope, PTF is obtained.
The E resin was completely calcined. Using this glass fiber, a woven fabric was produced according to the same standard as in Example 1, supplied to a hot roll, and heat-treated under the same conditions as in Example. In the combustion test using ethyl alcohol, the igniting, the igniting, and the amount of smoke were as good as in Example 1 in the combustion test with ethyl alcohol. That is, it was nonflammable. However, when the skin touches the fabric surface, there is a tingling discomfort, and after a while after strong touch, red spots are formed on the surface of the skin,
Itchy and practically problematic.

[0038]

As described above, the non-combustible fabric of the present invention uses a heat-resistant long fiber whose surface is coated with a fluororesin, and the fabric contains an unfired fluororesin and ethyl alcohol. In the combustion test, there is no ignition or flame and no or little smoke, so it is smokeless and has no discomfort such as tingling on the skin, and has excellent properties such as cleanability, color and texture. Incombustible fabric can be realized. Further, when a bulky processed yarn of heat-resistant long fiber is used, a non-combustible fabric having a fired layer of a fluororesin on the surface can be realized without losing the bulkiness.

Next, according to the method for producing a noncombustible fabric of the present invention, a dispersion containing a fluororesin is impregnated with heat-resistant long fibers, a predetermined amount of a dispersion of the fluororesin is adhered, and then at least one of the fluororesin is added. Heat treatment so that the part is unfired,
Next, a fiber coated with the fluororesin containing the unsintered component is formed into a fabric, and then at least one surface of the fabric is subjected to a heat-smokeless treatment, whereby the non-combustible fabric of the present invention is efficiently and reasonably obtained. Can be manufactured.

[Brief description of the drawings]

FIG. 1 is a process chart showing a fluororesin coating process of a bulky yarn according to one embodiment of the present invention.

FIG. 2 shows a step of heating and smokeless treating at least one surface of the fabric according to one embodiment of the present invention.

FIG. 3 shows another embodiment in which the same fabric is subjected to a heating and smokeless treatment.

FIG. 4 shows another embodiment in which the same fabric is subjected to a heat-smokeless treatment.

FIG. 5 shows a combustion test method used in Examples and Comparative Examples of the present invention.

[Explanation of symbols]

1 thread winding package 2,3,4,5,8,15,16,17,18,19,
Guide roll 6 Dispersion tank containing fluororesin 7 Dispersion liquid containing fluororesin 9a Supply tank for dispersion liquid containing fluororesin 9b Supply line for dispersion liquid containing fluororesin 10 Vacuum zone 11a Vacuum pump 11b Vacuum line 12 Hot plate 13 Heater 14 Yarn passage hole 20 Tension roll 21, 22 Take-up roller 23 Take-up roller 24 Exhaust fan 25, 26, 27 Temperature controller 28 Doctor roll A Drying zone B Firing zone G Bulk processed yarn 30 Supply fabric 31 Heating roll 32 Nip roll 33 Heating Fabric after treatment 34 Supply roll 35 Guide roll 36 Guide roll 37 Winding roll 41 Measuring instrument table 42 Incline holder 43 Arm 44 Cork table 45 Ethyl alcohol iron container 46 Flame 50 Sample (帛)

Claims (11)

(57) [Claims] 1. A fabric using a fiber in which a surface of a heat-resistant long fiber is coated with a fluororesin, wherein the fabric contains an unsintered fluororesin and has an ignition and a flame in a combustion flame test of ethyl alcohol. Non-combustible fabric characterized by no smoke and little or no fuming. 2. The non-combustible fabric according to claim 1, wherein the unsintered fluororesin is present at a substantially central portion when viewed from a cross-sectional direction of the heat-resistant fiber. 3. The non-combustible fabric according to claim 1, wherein the adhesion rate of the fluororesin is in the range of 5 to 70% by weight calculated by the following equation (Equation 1). (Equation 1) 4. The non-combustible fabric according to claim 1, wherein the heat-resistant long fibers are at least one fiber selected from glass fibers, polyimide fibers, aromatic polyamide fibers, and carbon fibers. 5. The heat-resistant long fiber is a bulky yarn.
3. The non-combustible fabric according to 1. 6. The non-combustible fabric according to claim 1, wherein the fabric is at least one selected from a woven fabric, a knitted fabric, and a non-woven fabric. 7. A method for producing a fabric using a fiber in which a surface of a heat-resistant long fiber is coated with a fluororesin, comprising impregnating a dispersion containing the fluororesin with the heat-resistant long fiber, and dispersing a predetermined amount of the fluororesin dispersion. Attached, and then heat-treated so that at least a part of the fluororesin is unfired, and then forming a fiber coated with the fluororesin containing the unfired component on a fabric,
Thereafter, at least one surface of the cloth is subjected to a heat-smoke-free treatment, thereby producing a non-combustible cloth. 8. After the heat-resistant long fiber is impregnated with a dispersion containing a fluororesin, the fluororesin-attached long fiber is squeezed out, and then the excess adhesion of the dispersion is removed using wind pressure. 3. The method for producing a non-combustible fabric according to item 1. 9. The method for producing a non-combustible fabric according to claim 7, wherein the method of removing the excess attached portion of the dispersion containing the fluororesin using wind pressure is by suction means. 10. The non-combustible fabric according to claim 7, wherein after forming a fiber coated with a fluororesin containing an unsintered component into the fabric, an organic component in the fabric is evaporated or decomposed at a high temperature using a heating roll. Manufacturing method. 11. The fluororesin is a polytetrafluoroethylene resin (PTFE resin), a tetrafluoroethylene-hexafluoropropylene copolymer (FEP resin), a tetrafluoroethylene-perfluorovinyl ether copolymer (PFA resin), or a polyfluoro resin. Vinylidene fluoride (PVDF resin), ethylene-tetrafluoroethylene copolymer (ET
The non-combustible fabric according to claim 1 or 7, which is at least one selected from an FE resin) and an ethylene-chlorotrifluoroethylene copolymer (ECTFE resin).