JPS60149451A - Organic fiber composite material, melting deterioration thereof due to frictional heating is reduced - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an organic fiber composite material that reduces melting deterioration of fibrous structures such as clothing due to frictional heat generation.

When a fibrous structure mainly composed of fibers having a relatively low melting point, such as synthetic fibers, is subjected to severe friction, it may melt and deteriorate in a very short period of time due to frictional heat generation, and may be damaged. Specifically, if you wear sports clothes made of polyester or nylon and perform a rotating volleyball pole, depending on how you fall, if you slide on the gymnasium floor, the entire contact area with the floor may melt instantly. This can cause large holes to form and cause the garment to be damaged to the point where it is almost impossible to retain its original shape. In addition, when sliding down a slide, frictional heat generation may cause it to melt and break. There are relatively many accidents in which swimsuits are damaged by slides attached to children's pools. In the case of children's clothing, it is often found that there are traces of melting in the damaged parts of the knees and heel, where the cause remains unknown. In addition to these, heat-melting synthetic fibers are used, as they are subject to significant deterioration due to frictional heat generation. For example, it is the surface material of ironing boards and insulation materials.

In order to reduce melting deterioration due to frictional heat generation, processing to lower the coefficient of friction has traditionally been carried out.
The problem with this method is that it is not necessarily durable enough to withstand washing, and its effectiveness may decrease if it gets wet, so it is not necessary or satisfactory for athletic clothing. The situation has not yet been reached.

In order to reduce melting deterioration due to frictional heat generation, various methods of coating with heat-resistant materials have been investigated, but none have been successful. The reason for this is thought to be that even if heat resistance is partially increased, the heat capacity does not increase that much, so the temperature eventually reaches the melting point of the low melting point portion, causing bath melting deterioration.

In order to prevent bath melting deterioration due to frictional heat generation by coating with a heat exchanger material, select a material with high thermal conductivity as the heat exchanger material.
Moreover, it is necessary to thicken the coating layer to promote heat dissipation. For this purpose, organic heat-resistant polymers are not preferred as coating materials because they have low thermal conductivity.

The coating material is preferably one containing an inorganic substance, especially a metal.

Plating and vapor deposition are known techniques for coating organic fiber materials with metal, but these metal films are generally extremely thin and are not suitable for heat dissipation. Also, because it is thin, its strength and durability are generally low. Moreover, it is a time-consuming processing method, consumes a large amount of energy, and is generally expensive.

(3) The present invention is an organic fiber composite material that reduces melting deterioration due to frictional heat generation, and is characterized by comprising a thermally sprayed inorganic material and a fibrous structure mainly composed of organic fibers having a lower melting point than the inorganic material. The purpose of this process is to increase the heat conduction in the surface direction of the thermal spray molded product and to reduce the molding cost of inorganic materials per unit weight1. This is done by forming the If necessary, the sheet-like material is further processed to return to its original shape.

Thermal spraying has long been known as a highly efficient technique for coating inorganic materials, in which the coated material is made into high-temperature fine particles that can be fused and is sprayed together with a high-temperature fluid, which is the workpiece, to create molded products. It is widely used as a surface processing technology. Recently, it has been used for surface processing of ceramics, etc., but it is difficult for heat transfer to occur during processing for materials with low thermal conductivity and low heat resistance, such as organic fiber materials. It has been said that the heat brought in by the thermal spray material raises the temperature of the object to be sprayed, causing deterioration of the fibers and resulting in poor bonding.

(4) In order to avoid fL, if the temperature of the thermal spray fluid is lowered or the thermal spray is performed from a distance, the thermal spray particles will not be integrated and will not bond with the fiber material. Therefore, it is a well-established theory that thermal spray materials cannot be processed unless they have a melting point lower than the softening point or thermal decomposition temperature of the fiber material.

As an example of thermal spraying processing for organic fibers, it is known that lead is sprayed onto cotton cloth to make radiation shielding work clothes. discloses an example in which epoxy resin prepolymer, polyethylene, polypropylene, and nylon 11 are thermally sprayed onto vinylon cloth and cotton cloth using powder for thermal spraying. In all of these examples, the melting point of the organic fiber is higher than the melting point of the thermal spray material, and although the maximum temperature of the blaster is as high as around 10,000°C,
The practical thermal spray processing temperature has been considered to be slightly lower than the melting point or pyrolysis temperature of the organic 1ml/#. The inventor of the present invention happened to discover that this established theory is incorrect while researching thermal spraying technology, and arrived at the present invention. Also, Tokukai 1
Publication No. 48-52644 states that when steel fRj is sprayed directly onto a hard vinyl chloride plate, a sprayed coating with weak bonding strength is obtained; It is stated that when copper is thermally sprayed, a thermally sprayed coating with strong bonding strength can be obtained. This method is considered to be an advantageous method for joining plastic plates and metals, but for joining cloth foils and metals, the process is less flexible than laminating cloth foils and metal films. Larger laminates are generally considered more advantageous. However, if an intermediate layer having better heat resistance and chemical resistance than the thermosetting resin is provided, a novel product can be obtained since the presence of the intermediate layer will have a greater protective effect on the organic fibers in the fabric. For example, if a metal (alloy) with a slightly lower melting point than the organic fiber is used as the intermediate layer, when a high melting point metal is thermally sprayed, the latent heat of melting absorbs the heat brought in by the thermal spraying material and exhibits a protective effect. While considering thermal spraying using such an intermediate layer, due to a mistake in experimental operation, a metal with a higher melting point than the organic fiber was sprayed on the part where the intermediate layer was not present, and it was found that the area where the intermediate layer was present was sprayed. It was found that the peel strength was greater than that of the original part, and from this we learned that the conventional theory was wrong.

The present inventor has conducted extensive research and found that by shortening the contact time per unit with the high-temperature fluid used for thermal spraying and by cooling as rapidly as possible after contact, the present inventors have found that the It was found that by thermally spraying inorganic materials such as metals and ceramics that have a melting point much higher than the melting point of the organic fibers, composite materials in the form of threads, ropes, fabrics, membranes, or thin plates can be obtained. , repeat this operation if the thickness of the molded product produced by thermal spraying is insufficient.
It's okay.

When thermal spraying is applied to a fibrous structure, the structure is formed into a sheet shape. Sheet-like materials include woven materials, knitted materials, non-woven fabrics, paper-like materials, fibers, threads, thin materials, and ropes arranged in a virtually parallel manner, and materials compressed into a flat surface by pressure. 1. (Hereinafter, such a structure will be referred to as a sheet-like product) After thermal spraying (7), the sheet-like product can be used as it is or after passing through a commonly used fiber processing process. It is possible to untwist the sheet-like material and use a rope or the like one by one. It is also possible to spirally wind a single thread or rope around a roller or the like in parallel, spray it, and then unwind it.

In the case of netting, it can be processed into a flat shape by stretching it in the direction of the grain. It is also possible to thermally spray a sheet material, slit the material, make it into a tape shape, burn it, or make it into a rope shape. The sheet-like material can be subjected to various processes that can be applied to ordinary fibrous materials before, after, or at the same time as thermal spraying.

The contact time between the high-temperature fluid used for thermal spraying and the sheet-like material mainly composed of organic fibers is 1 second or less per time, preferably 1/10 to 1/10,000 seconds. Specifically, the thermal spraying can, the sheet-like object, or both are moved, and the relative velocity thereof, that is, the relative speed between the feeding speed of the sheet-like object and the central axis of the high-temperature fluid for thermal spraying, is set to 01 m/sec or more and 100 rIL/sec or less. As a specific device, while feeding the cloth slowly,
A device that sprays by moving a thermal spray can back and forth at a fairly high speed in a direction almost perpendicular to the sheet (8) - The sheet is connected like an endless belt, and instead of running in a circular pattern at a speed of 100 lbs., the thermal spray gun is moved slowly. Thermal spraying equipment, or the thermal spraying equipment using a slowly moving thermal spraying can in which the sheet is reciprocated between a reversible winding device and an unwinding device, and a thread or rope is wound spirally in parallel around a roller. A device that rotates something at a high speed and moves the thermal spraying can slowly in a direction almost perpendicular to the thread or rope before spraying. It is possible to use a device that sprays multiple thermal spray guns either in a fixed state or without moving them.

In carrying out the present invention, the sheet material to be thermally sprayed and the high-temperature fluid used for thermal spraying are cooled rapidly in as short a time as possible after they are separated from each other. Cooling is preferably carried out by spraying a gas or a liquid or solid dispersed in a gas onto the thermally sprayed molding.

Preferably, air or an inert gas is blown.

(9) The flow velocity is 1 rrL/sec or more, preferably 10 m/sec or more and 1 sonic velocity or less. Preferably, cooling is also performed from the surface of the sheet-like material. Cooling from the back side is done by co-rotating rollers.
It is preferable to use a solid cooling device provided with a heat removal mechanism inside, such as a yuzu-shaped plate cooling device. This is because by bringing the sheet material into close contact with a solid cooling device, it is possible to prevent the sheet material from becoming unevenly sprayed or non-uniformly sprayed due to the fluid flow for thermal spraying and cooling.

In the present invention, since the sheet-like material to be thermally sprayed is porous, some of the thermally sprayed material may pass through the sheet-like material and come out with a thermal spray. The equipment that cools the sheet-like material to be thermally sprayed from the back side must be maintained under conditions where the thermal spraying material does not adhere to it.To do this, the surface must be smoothed to a certain level of gloss, and the surface temperature must be kept at 200°C or less, preferably. , or maintained below 100°C]. The cooling device is preferably attached with a passive device for bringing the sheet material to be thermally sprayed into close contact with the cooling device, and further preferably with a device for scraping off the thermal spraying material when it adheres.

(10) The main feature of the composite material of this defense is that the fibrous structure made of organic fibers and the thermally sprayed inorganic material are integrated in a multilayered manner, and the bonding force between the image components is the same as that of the organic fibers. This appears to be due to the bonding force on the surface and the entangled structure of the #U acid component interface.

Such structures can be formed even in conditions where there are significant discontinuities in the inorganic sprayed part, and the presence of such discontinuities makes them highly flexible and durable. A good composite material is formed.

In the thermal spray processing of inorganic materials when manufacturing the composite material of the present invention, raw materials are formed into fine particles at a temperature that can be melted or sintered in plasma generated by flame or electric discharge, and then exposed to a plasma stream or high-temperature air stream. 1, and the relative velocity between the central axis of the sheet-like material and the day-temperature fluid used for thermal spraying is 0.177 L/sec or more; 100771
．． / seconds or more, and immediately after the sheet-like material is separated from the high-temperature fluid, it is rapidly cooled.

By doing this, the sheet-like material is removed from the high-temperature fluid used for thermal spraying before deterioration due to heat progresses. It is also possible to add cooling to the sheet before it comes into contact with the high-temperature fluid1.This cooling increases the heat capacity of the sheet and suppresses deterioration5. This operation is repeated until the mold reaches the desired value, and the inorganic material is formed into a film, sponge, or scale shape on the sheet material.

Here, the particles riding on the plasma flow or high-temperature air flow are
The entire particle, its surface layer, or its binder component is melted, accelerated to near-sonic speed or supersonic speed, and collides with the sheet material.12 The particles are pressed against the fiber surface by their own momentum and form a reflected shape. At the same time, some of them pierced the surface of AI# and stared at it. In addition, some of the particles penetrate into the sheet-like material through the gaps between the fibers and fuse with subsequent particles to form a network structure. It has been found that by cooling the fiber at a sufficient rate, it is possible to form a thermal spray coating layer without softening the core of the fiber.

Inorganic particles can be formed into a continuous film, an intermittent film, or (12) a layered film by selecting thermal spraying conditions. Furthermore, by incorporating particles that do not melt during thermal spraying, a sintered body-like molded product or a sponge-like molded product can be obtained.

Thermal spraying is mainly performed on one side of a sheet material made of organic fibers. Although it is simple and cost-effective to use only one type of thermal spray material, there are cases where sufficient functionality cannot be obtained with one type, and it is sometimes preferable to use two or more types. For thermal spraying of two or more types of materials, it is possible to thermally spray them sequentially in a multi-layered form, or by thermally spraying a mixture near the boundary between two types of materials, it is also possible to form the composition so that the composition gradually changes from one to the other. It is.

When thermal spraying is performed in multiple layers, it is possible to thermally spray materials with extremely high melting points with high efficiency by sequentially spraying materials with high melting points. In particular, when metal is thermally sprayed, as the thermal sprayed coating becomes thicker, cooling becomes easier and the subsequent thermal spraying tends to become more efficient. Furthermore, when thermal spraying is performed in multiple layers, it is possible to suppress the phenomenon of cracks in the thermal spray coating (13) by sequentially spraying layers with higher hardness. When spraying materials with low elongation such as ceramics, first spray a soft metal such as aluminum, then spray a hard metal on top of that, and then spray ceramics on top of that to greatly reduce cracks in the ceramic layer. can be less than '1-. Furthermore, when thermal spraying is performed in a multi-layered manner, a metal having a high infrared reflectance can be thermally sprayed on the outermost layer to exert a heat insulating effect against radiant heat transfer mainly by reflecting infrared rays. Preferred metals for this purpose include aluminum and silver.

The sheet material mainly composed of organic W4 fibers, which is a component of the organic M fiber and inorganic composite material of the present invention, includes woven, knitted, nonwoven, and braided fabrics of natural and artificial organic fibers.
It is a flat-shaped item such as paper, and includes items that are brushed, flocked, flocked, resin coated, etc. This may contain some inorganic fibers, adhesive resins, fillers, sizing agents, and persimmon finishing agents (14).

The thermally sprayed inorganic material, which is one component of the composite material of organic fiber and inorganic material of the present invention, is a component of the composite material of organic fiber and inorganic material. It is a thermal spray molded product of a thermally sprayable inorganic material with a melting point higher than the melting point or pyrolysis temperature of the fiber. Here, the inorganic materials include metals, ceramics, and thermeft, which is a composite material of metals and ceramics.

More specifically, metals, alloys, carbon, boron, silicon,
These are oxides, carbides, nitrides, borides, and mixtures of two or more substances selected from these groups. .

Preferably, the thermally sprayed inorganic material, which is a component of the organic fiber/inorganic composite material of the present invention, is mainly made of metal. It is particularly preferable to use metals with high thermal conductivity such as silver, copper, aluminum, magnesium, zinc, and molybdenum.

As the thermal spraying method in the present invention, any conventionally known method can be applied, but there are two methods: a method in which the thermal spray material is introduced in powder form (15) into a flame or a plasma jet, and a method in which the thermal spraying material is introduced into a flame or plasma jet, and a method in which the thermal spraying material is thermally sprayed by flame or arc discharge. A preferred method for producing the composite material of the present invention is to introduce a rod-shaped thermal spray material into the material, crush it, melt it, and then thermally spray it.

In producing the composite material of the present invention, the relative speed between the sheet material and the thermal spray gun is 0.1 to 100 m in any case.
/second. 0.1? If it is less than FL/sec, cooling will be insufficient no matter how the thermal spraying conditions are changed, and deterioration of the organic fibers cannot be avoided. -10,000 rn
It is difficult to move the thermal spray gun at speeds close to 100 rrL/sec, and the only viable method is to rotate a cooling roller with a sheet-like material on it at high speed.However, when the relative speed exceeds 100rrL/sec, centrifugal force Thermal spray particles are less likely to stick. The relative speed between the sheet material and the spray can is 0.5 to 20 rr.
L/sec is preferred. When the relative velocity is 0.57 rL/sec or less, there are severe restrictions on the material to be sprayed and the spraying conditions, which is disadvantageous in terms of cost. If the time is longer than 20.7 seconds, the length that the sheet-like material travels during the speed increase process at startup of the device becomes significantly longer, and in order to maintain the uniformity of the sprayed product (16) in this area, it is extremely complicated. It is necessary to carry out precise spraying amount control, which results in a drawback that the cost of the equipment becomes extremely high.

The relative speed between the sheet material and the thermal spray gun is more preferably 1 to 5 rrL/sec. When it becomes 17FL/sec or more,
Many types of thermal spray materials can now be sprayed under conditions that maximize the spray gun's ability, and even if the relative speed is increased any further, the production rate of thermal spray materials at a heavy pace will not increase. 5
It is possible to move the spray gun up to 77 L/sec, and below this speed many types of foil spraying equipment can be used and production becomes extremely easy. Especially cloth,
In the case of thermal spraying on paper, processing can be performed without stopping except when changing the supply of sheet materials, resulting in extremely low costs.

The surface of the spray molded product obtained by the method of the present invention has a highly uneven surface, does not have strong luster, and exhibits a so-called satin-like appearance. When the spray molded product has malleability, the surface can be easily smoothed. Smoothening of the surface can be achieved by applying strong pressure to a smooth surface. The material is preferably pressed between rollers made of a hard material having a smooth surface. Materials that are malleable at temperatures that do not degrade the organic fibers can be selected from metals and alloys. If the material of each layer has ductility, smoothing treatment is possible even for multi-layer thermal sprayed molded products.

Even in the case of a material that is not malleable, if a material with malleability is thermally sprayed and smoothed and then thermally sprayed on top of the material, the smoothness will be improved. However, it should be noted that the smoothing process narrows the temperature conditions that allow thermal spraying, making thermal spraying difficult.

Because of the severe irregularities on the surface of the thermal spray molded product, the wear resistance and bending resistance of the composite material of the present invention cannot necessarily be said to be sufficient. To improve this, it is effective to apply a thin layer of organic polymer to the surface.

Various organic polymers can be used, but those with a particularly low coefficient of friction such as polyurethane, acrylamide, silicone, and epoxy resins are preferred. When these resins are used in large quantities, they can improve the surface gloss, but they have the disadvantage of decreasing air permeability.

In addition to the surface irregularities, the thermal spray molded product of the present invention has pores in the direction that penetrates the film, and has air permeability. Although this contributes little to the air permeability of the composite material of the present invention, it has a detrimental effect on the chemical resistance. The aforementioned Iwatsuki polymer coating is effective for thinning such pores. .

The composite material of the present invention can be manufactured by molding a sheet-like material and then thermally spraying an inorganic material.

In particular, when making clothing, it is difficult for a needle to pass through the sprayed layer, so it is better to spray it after sewing to make a better product.

However, since it is very difficult to cool down after thermal spraying, it is necessary to adjust the cooling device for each size of clothing, which is disadvantageous in terms of cost. When thermal spraying is applied after clothing has been sewn, it is also preferable to perform the thermal spraying locally, particularly in areas where fire resistance is required.

The present invention will be explained below with reference to Examples.

(19) Example 1 100% polyester spun yarn cloth (basis weight 220g/i
, flat wire, density 42 lines/inch x 42 lines/inch) using a plasma spraying system 7M equipment manufactured by Metco, Inc. in the United States.
Sp (melting point: 1,840°C) was spray molded to a thickness of about 25 μm. Thermal spraying conditions were: voltage 50 volts, current 1t6o ampere, alcon flow rate 2 normal cubic meters/hour, working speed z2rrL/sec (one contact time with the spray fluid flame 0.014 seconds), spray gun moving speed (fabric feed direction). (perpendicular to) O, OSm/sec, distance between spray gun and cloth 120~
14Qff, the number of thermal spraying was 16 times. Cooling air was sent at a flow rate of 12 m/sec toward the point where the cloth escaped from the spray fluid flame to rapidly cool the cloth.

The surface condition of the cloth thus obtained is good, and the texture is slightly harder than the raw Bossester cloth, but it does not exhibit any roughness. If we express the stiffness of the cloth by the distance that the horizontally protruding cloth hangs from the tip of the support base to a line drawn diagonally downward at 45 degrees, we can obtain a value of 7 (10 cm for 1 m) for the polyester cloth of raw material (20). It was found that the material had become slightly harder due to thermal spraying. However, this value was not large enough to cause any problems as a characteristic of the cloth.

The abrasion resistance of this cloth was examined using a taper set abrasion tester. An abrasion test was carried out using a C5-17 abrasion wheel and a load of 500 g, with the end point of abrasion being the point at which 1/2 of the surface of the cloth became polyester fibers, and the abrasion life was 800 cycles.

The peeling resistance of the ceramic layer was investigated. Although the cellophane tape was applied and peeled off 20 times, no substantial peeling was observed.

In order to examine the wash resistance of this cloth, it was washed for 10 minutes in a 0.5% synthetic detergent solution using a commercially available electric washing machine A (Hitachi PF2500 Aozora), but there was no substantial change.

Glue this cloth to a wooden roller (cherry wood) and rotate it at a surface speed of 600 B for 7 minutes, then attach it to a wooden rod (width 2 cm).
were crimped together by applying a lot of pressure, and the changes after 2 seconds were examined. This fabric showed only slight abrasion in the thermally sprayed layer when the pressure was between 100 g and 5 kg (7), but in the case of the polyester fabric used as a raw material, all the fibers melted when the pressure exceeded 00 V. Ta. This change was determined to be of the same level or slightly smaller than that of cotton cloth, which is a non-melting material.

Example 2 A frame spray gun 12E model manufactured by Metco, USA was used on the same polyester cloth as in Example 1.
Thermal spraying was carried out by supplying a No. 1111 aluminum wire.

Thermal spraying conditions were: oxygen flow rate of 22 Jremal cubic meters/hour, acetylene flow rate ii1. ONOJremal cubic meter/hour, wire feeding speed 'thgy', cloth feeding speed 2.2 m
The spraying time was 7 seconds, the moving speed of the spraying gun was 0.1 m/sec, the distance between the spraying gun and the cloth was 200, and the number of spraying was 6 times. Cooling air was sent at a flow rate of 10 rrL/sec toward the point where the cloth escaped from the spray flame to cool the cloth.

The average thickness of the aluminum film on the fabric thus obtained was approximately 85 μm, and the surface had an appearance similar to that of a metal material with a matte finish. The texture is a little harder and a little rougher than the polyester cloth it is made from, but it is not uncomfortable. The stiffness of the cloth is expressed by the distance that the horizontally protruding cloth hangs 45 degrees downward from the tip of the support base to the top of the t line.
A value of 18 cm was obtained, compared to 7 cm for the polyester cloth used as the raw material, indicating that the material was considerably hardened by thermal spraying.

However, this value can be reduced by changing the thickness of the fabric, so it is not so large that it poses a problem when worn.

The abrasion resistance of this fabric was examined using a taper set abrasion tester.1.The end point of abrasion was the point at which 1/2 of the fabric surface was made up of polyester fibers, the abrasion ring was C8-17, and the load was 5.
When a wear test was conducted at 00y, the wear life was 1.0
It was 00 times.

Tamenise examines the peeling resistance of aluminum no.

I repeated pasting and peeling the tape 20 times, but
No substantial peeling was observed.

In order to examine the washing resistance of this cloth, we used a commercially available electric washing machine (Hitachi PF 2500 Aozora) to wash it with 0.5% synthetic detergent.
Washed in solution for 10 minutes with no substantial change.

When this cloth was examined for bath melting deterioration using the same friction device as used in Example 1 (23), no friction melting of the fibers was observed even when the pressure was increased to 20 kQ.

Example 8 In place of the polyester cloth of Example 1, fabrics made of vinylon, polypropylene, nylon, and acrylic spun yarns having approximately the same basis weight were used and treated under the same conditions as in Example 1. When the distance between the thermal spray can and the cloth was adjusted, a favorable distance existed for the bamboo material, and the thermal spray coating obtained at that distance had excellent abrasion resistance and peeling resistance. did. In addition, the resulting fabric exhibited flexibility and breathability within a range that allowed it to be used as clothing. The obtained cloth foil showed excellent durability against frictional heat generation.

Comparative Example 1 In Example 1, the cloth feed was stopped and the distance between the thermal spray gun and the cloth was adjusted to perform the treatment, but the thermal spray coating was not formed at a distance where the vinylon fibers did not melt, and the conditions under which the thermal spray coating was formed Melting of the vinylon fiber occurred.

When the spray gun speed is increased to 0.1 m/s, vinyl (
24) Conditions have arisen where a thermal spray coating is formed on the melted fibers. At this time, the rate of scattering of the sprayed material was large and the growth of the film was slow.

Example 4 In place of the polyester cloth in Example 2, fabrics made of vinylon, BOPP propylene, nylon, and acrylic spun yarns with approximately the same basis weight were used and treated under the same conditions as in Example 2. A thermal sprayed coating with excellent releasability was obtained. In addition, the obtained fabric exhibited flexibility and breathability within a range suitable for use as clothing, and had excellent durability against frictional heat generation.

Example 5 Date 80-100g instead of the polyester cloth of Example 2
/rrt polypropylene, nylon, vinylon, and acrylic long fiber cloths were treated under the same conditions as in Example 2. All of them showed thermal sprayed coatings with excellent abrasion resistance, peeling resistance, and durability against frictional heat generation. Obtained.

Example 6 (25)-m- Instead of the polyester cloth of Example 2, cheesecloth (density 8 pieces/
When treated under the same conditions as in Example 2, the aluminum thermal spray coating covered the back of the fabric, exhibiting excellent abrasion resistance, peeling resistance, and durability against frictional heat generation. Indicated.

Example 7 Alumina (Meteco 1058F), chromium oxide (
Metco 106F), Zirconia (Meteco 201NS)
, molybdenum (Meticor 3), 17% cobalt-tungsten carbide cermet (Meticor 8 lI'N)
When s-1) was thermally sprayed, a uniform and good thermal sprayed coating was formed in all cases, and exhibited excellent abrasion resistance, peeling resistance, and durability against frictional heat generation.

Example 8 When zinc, copper, silver, nickel, and electrolytic iron were thermally sprayed instead of the aluminum wire in Example 2, a good thermal sprayed film was formed in all cases, and the durability against friction (26) and heat generation was improved. was excellent.

Example 9 The aluminum sprayed polyester cloth obtained in Example 2 was further sprayed with molybdenum spray powder (Methikoro 8) using a plasma spraying device. The thickness of the obtained stainless steel film was 10 μm on average. The resulting thermal spray coating was uniform and exhibited excellent abrasion resistance, peeling resistance, and durability against frictional heat generation.

Patent applicant: Kuraray Co., Ltd. Agent: Patent Attorney Ken Honda (27) -3:T't-

Claims (2)

[Claims] (1) An organic fiber composite material that reduces melting deterioration due to frictional heat generation and is characterized by consisting of a thermally sprayed inorganic material and a fibrous structure mainly composed of organic fibers with a lower melting point than the inorganic material. (2) In the preceding paragraph, an organic fiber composite material that reduces melting deterioration due to frictional heat generation, characterized in that the organic fibers at the time of forming the thermally sprayed molded product are in the form of a sheet.