JPS6395938A - Fiber material for reinforcing hose - Google Patents

Abstract

PURPOSE:To improve the corrosion resistance, heat resistance and the like of reinforcing fibers against a transporting fluid, by a method wherein organic fibers for reinforcing a rubber hose for transporting fluid such as gasoline or the like are coated by ceramics. CONSTITUTION:A reinforcing member 2, consisting of organic fibers such as vinylon or the like or a cloth, is impregnated with a treatment solution, containing resorcin, formalin, rubber latex A, ceramic powder B and at least one of ethylene urea compound C or epoxy modified phenol formic aldehyde condensate D, then, is dried and heat-treated to form a ceramic coating layer on the surface of said reinforcing member. Prior to said treatment, said fibers may be treated by a treatment solution consisting of polyepoxide, polyisocyanate and latex. A hose is constituted of an inner rubber tube 1 and an outer rubber tube 3, which are reinforced by said treated fibers. This reinforcing member is excellent in corrosion resistance against gasoline or the like.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to hose reinforcement for forming fiber reinforced layers in fuel oil hoses, lubricating oil hoses, refrigerant gas hoses for air conditioners, and hoses for transporting fluids such as chemicals and solvents. The present invention relates to textile materials for use.

[Conventional technology]

Generally, for the various types of fluid transport hoses as described above, a fiber reinforced layer is formed in close contact with the outer periphery of the inner tube rubber layer using a hose reinforcing fiber material made of organic fiber yarn or cloth, and this fiber reinforced layer is A material obtained by closely forming an outer tube rubber layer around the outer circumference of the tube is used. In the above hose, synthetic fibers such as polyester fibers, nylon fibers, polyvinyl alcohol fibers, and polypropylene fibers, and natural fibers such as cotton are used as the organic fibers constituting the fiber reinforcing layer, and these yarns are braided (spiral or A fiber reinforcing layer is formed by taping a fabric (woven fabric or nonwoven fabric) obtained using the above-mentioned organic fibers. In this case, the hose reinforcing fiber material such as organic fiber yarn or cloth is impregnated with a resorcinol-formalin-rubber latex (hereinafter abbreviated as rRFLJ) solution in order to improve its adhesion to the inner and outer tubes. Furthermore, an adhesive is applied to the fiber reinforcing layer made of the hose reinforcing fiber material treated with the RFL solution in order to improve the adhesion to the inner and outer tubes. In the thus obtained hose, the fiber reinforcing layer adheres well to the inner and outer tubes, and exhibits good performance in transporting various fluids.

[Problem that the invention seeks to solve]

However, recently, there has been a desire to provide a hose with performance characteristics that far exceed those of the conventional fluid transport hoses. For example, with fuel hoses for automobiles, excessive heat is applied to the hoses as the temperature inside the engine room increases due to the miniaturization and higher performance of cars.
Gasoline is oxidized at high temperatures to produce peroxide-containing products, and it is desirable to have resistance to these heat and highly corrosive gasolines. Furthermore, based on future changes in fuel conditions, it is desired to improve resistance to highly soluble gasoline such as alcohol-mixed gasoline. In addition, in lubricating oil hoses, the liquid temperature of lubricating oil such as engine oil and power steering increases, and the permeability of the oil increases accordingly.
Improved resistance to heat and oil is desired. Furthermore, for car air conditioner hoses, in addition to improved resistance to heat and refrigerant gases such as Freon gas, it is also desired to have improved resistance to splashing with acids, antifreeze, and the like. However, the conventional hoses cannot fully satisfy these required characteristics. In other words, in conventional hoses, the main focus is on selecting the shape, material, etc. of the inner and outer tubes that meet the required characteristics, and the fiber reinforced layer only functions as a pressure-resistant layer. Since no consideration has been given to the fiber reinforced layer, under the recent severe usage conditions mentioned above, the fluid that has permeated through the inner tube etc. erodes the fiber reinforced layer, causing
There are many cases where the fiber reinforcing layer deteriorates before the outer tube deteriorates, causing breakage of the fiber reinforcing layer, resulting in a fatal problem of reduced pressure resistance and loss of hose function.

In order to solve these problems, we need to improve the performance of the hose reinforcing fiber material that makes up the fiber reinforced layer so that it will not be eroded by the transportation fluid flowing inside the hose and will have properties such as heat resistance. There is a strong need to improve.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a fiber material for reinforcing a hose that is not eroded by the transport fluid flowing inside the hose and has many properties such as heat resistance.

[Means for solving problems]

In order to achieve the above object, the gist of the present invention is a fiber material for reinforcing a hose, which is made of thread or cloth mainly composed of organic fibers and covered with a ceramic layer.

That is, in order to improve the characteristics of the above hose reinforcing fiber material, the present inventor conceived that good results could be obtained by coating the reinforcing fiber material with a ceramic layer, and conducted a series of studies and developed the present invention. Reached.

The hose reinforcing fiber material of the present invention can be produced by dispersing ceramic powder in the RFL solution, but
Since this alone is somewhat unsatisfactory in terms of the adhesion of the ceramic powder and the effects obtained, the present inventor has found that excellent effects can be obtained by further using the above-mentioned ethylene urea compound and epoxy-modified phenol formaldehyde condensate. I found it.

The hose reinforcing fiber material of the present invention is usually impregnated and coated with a treatment liquid (aqueous) having the following composition.

(A) Resorcinol/formalin/rubber latex.

(B) Ceramic powder.

(C) Ethylene urea compound.

(D) Epoxy-modified phenol formaldehyde condensate.

In the above treatment liquid, components (A) and (B) are essential components, and either one or both of components (C) and (D) are used.

As mentioned above, the resorcinol/formalin/rubber latex of component (A) is generally called RFL, and the molar ratio of resorcinol and formaldehyde is 1:0.1 to 1:8. It is set. Preferred is 1:O,S to 1:5, most preferred is 1:1
~1:4. Examples of the rubber latex used together with the resorcinol and formalin include natural rubber latex, styrene-butadiene copolymer latex, vinylpyridine-styrene-butadiene terpolymer latex, nitrile rubber latex,
Examples include chloroprene rubber latex, which can be used alone or in combination. Among the above-mentioned rubber latexes, it is particularly preferable to use vinylpyridine-styrene-butadiene terpolymer latex alone or in an amount of 1/2 or more of the total amount. The blending ratio of resorcinol and the rubber latex is set at 1:1 to 1:15 based on the solid content, and preferably within the range of 1:3 to 1:12.

The smaller the particle size of the ceramic powder (B), the better the performance.Those having a particle size in the range of 0.01 to 10 .mu.m are usually used, and those in the range of 0.01 to 1 .mu.m are preferable.

The ethylene urea compound of component (C) has the following general formula (1
).

Typical examples of the above ethylene urea compounds include octadecyl isocyanate, hexamethylene diisocyanate,
Isophorone diisocyanate, tolylene diisocyanate, metaxylene diisocyanate, diphenylmethane diisocyanate.

Examples include reaction products of aromatic/aliphatic isocyanates such as naphthylene diisocyanate and triphenylmethane triisocyanate and ethyleneimine. Preferred are aromatic ethylene urea compounds such as diphenylmethane diethylene urea.

The epoxy-modified phenol formaldehyde condensate of component (D) is represented by the following general formula (2).

H2CH2 In the above formula (2), good results are obtained by using a compound with a molecular weight of 1200 to 1300 and an epoxy value of 4.0 to 4.5 eq/kg.

In the treatment liquid consisting of the above components (A) to (D), (A
The total solid content of component ) and at least one of components (C) and (D) is preferably set to 10 to 25% by weight (hereinafter abbreviated as "%"). The ratio of the total amount of component (A) and at least one of components (C) and (D) to the ceramic powder is 1:0.5 to 1.5 of the former to the latter on a weight basis. Preferably 1
:0°8 to 1.2.

Applying ceramic coating to the hose reinforcing fiber material made of the above organic fiber thread, cloth, etc. using the above treatment liquid means that the hose reinforcing fiber material made of the above organic fiber thread, cloth, etc. The above-mentioned treatment liquid is impregnated into the above-mentioned hose reinforcing fiber material by dipping it in, spraying from a nozzle, or contacting with a roller, and then drying. In this case, the amount of the treatment liquid attached is preferably set to 0.5 to 10% of the total solid content, more preferably about 1 to 5%.

In addition, the hose reinforcing fiber materials made of threads, cloth, etc. mainly made of organic fibers that are treated with the above treatment liquid include synthetic fibers such as polyester fibers, nylon fibers, rayon fibers, polyvinyl alcohol fibers, and polypropylene fibers. It is made of thread, cloth, etc. mainly made of natural fibers such as cotton fibers, and the type of fiber is not particularly limited. There is no problem even if some inorganic fibers such as carbon fibers, glass fibers, metal fibers, etc. are mixed in. Here, the term "mainly" means to include cases where the hose reinforcing fiber material made of thread, cloth, etc. is composed only of the main organic fibers.

As described above, the main constituent fibers of the above-mentioned fiber material for a hose are organic fibers, and the type thereof is not particularly limited as long as it is an organic fiber. However, good effects come to be obtained when using polyester fibers.

In particular, when using polyester fibers, in order to obtain the best effect, before treating with the above treatment liquid, use a treatment liquid containing the following components (E), (F) and (G). It is preferable to perform impregnation treatment and then impregnation treatment with the above treatment liquid.

(E) Polyepoxide compound.

(F) Blocked polyisocyanate compound.

(G) Rubber latex.

In this way, the hose reinforcing fiber material of the present invention includes:
For example, one is impregnated and coated with only the treatment liquid containing components (A) to (D) mentioned above, and the other is treated with (E) as described above.
~ (G) After being impregnated and coated with a treatment liquid containing the component,
There are two types of products that have been impregnated and coated with a treatment solution containing the above components (A) to (D).

The polyepoxide compound of component (E) above is a compound containing at least two or more epoxy groups in one molecule in an amount of 0.2 g equivalent or more per 100 g of the compound, and includes ethylene glycol, glycerol, sorbitol, pentaerythritol, and polyethylene glycol. Reaction products of polyhydric alcohols such as epoxides with halogen-containing epoxides such as epichlorohydrin, and polyhydric alcohols such as resorcinol, bis(4-hydroxyphenyl) dimethylmethane, phenol-formaldehyde resin, resorcinol-formaldehyde resin. Examples include reaction products of phenols and halogen-containing epoxides, and polyepoxide compounds obtained by oxidizing unsaturated phase compounds with peracetic acid or hydrogen peroxide, such as 3,4-epoxycyclohexene epoxide, 3 .4-epoxycyclohexylmethyl-3,4-epoxycyclohexenecarboxylate, bis(3,4-epoxy-6-methyl-cyclohexylmethyl)adipate, and the like. Particularly preferred are reaction products of polyhydric alcohols and epichlorohydrin.

The blocked polyisocyanate compound of component (F) is
It is an addition compound of a polyisocyanate compound and a blocking agent, and the blocking component is liberated by heating to generate an active polyisocyanate compound. Examples of the polyisocyanate compound include tolylene diisocyanate, metaphenylene diisocyanate,
Polyisocyanates such as diphenylmethane diisocyanate, hexamethylene diisocyanate, polymethylene polyphenyl isocyanate, triphenylmethane triisocyanate, and compounds having two or more active hydrogen atoms, such as trimethylolpropane and pentaerythritol, are combined with isocyanate groups. Examples include polyalkylene glycol adduct polyisocyanates containing terminal isocyanate-l groups obtained by reacting (-NGO) and hydroxyl groups (-OH) in a molar ratio of more than 1. In particular, aromatic polyisocyanates such as tolylene diisocyanate, diethylmethane diisocyanate, and polymethylene polyphenylisocyanate are preferred. Examples of blocking agents include phenols such as phenol, thiophenol, cresol, and resorcinol, aromatic secondary amines such as diphenylamine and xylidine, phthalic acid imides,
Examples include lactams such as caprolactam, other oximes, and acidic sodium sulfite.

Representative examples of the rubber latex of component (G) include natural rubber latex, styrene-butadiene copolymer latex, and nitrile rubber latex.

Examples include chloroprene rubber latex, vinylpyridine/styrene/butadiene terpolymer latex, etc. Among these rubber latexes, vinylpyridine and
Good results can be obtained when the styrene-butadiene terpolymer latex is used alone or in an amount of 1/2 or more of the total amount.

The treatment liquid consisting of the above components is an aqueous liquid, and the blending weight ratio of each component is (E)/((E)'+ (F)) is 0.05.
~0.9, and (G)/((E)+(F)) is 0.5
It is preferable to use it so that it becomes -15. Particularly preferred is (E)/((E)+(F)) of 0.1 to 0.5, and (G)/C(E)+(F)] of 1
~10.

The aqueous liquid containing such components contains the organic fiber yarn,
It is preferable to impregnate the hose reinforcing fiber material made of cloth or the like so that the solid content becomes 1 to 30% of the weight of the hose reinforcing fiber material, more preferably 3.
~20%. The method of impregnating this treatment liquid is as described in (A) above.
This can be carried out in the same manner as the impregnation with a treatment liquid containing components (D).

In this way, the hose reinforcing fiber material treated with the treatment agent forms a fiber reinforcing layer between the inner tube rubber layer and the outer tube rubber layer.

The inner tube rubber layer and the outer tube rubber layer are made of acrylonitrile-butadiene copolymer (NBR), hydrogenated NBR in which part or all of its conjugated diene unit portion is hydrogenated, and NBR.
/PVC (vinyl chloride resin), fluororubber (FKM)
, chlorosulfonated polyethylene (CLSM), chlorinated polyethylene (CPE), chlorobrene (CR), ethylene-propylene conjugated diene copolymer (EPDM),
It is manufactured using rubber such as isoprene-isobutylene copolymer (IIR) and thermoplastic resin such as PVC, polyamide resin, and polyolefin resin.

When a hose is manufactured using the hose reinforcing fiber material treated with a treatment agent as described above, it is carried out, for example, as follows.

(1) An unvulcanized rubber composition for forming an inner tube is extruded from an extruder to form an inner tube.

(2) Next, place the above (A) on the extruded inner tube in advance.
~ Ceramic-coated organic fiber yarn immersed in a treatment solution consisting of component (D) and dried (fiber material for hose reinforcement)
are braided to form a fiber reinforcing layer around the outer periphery of the inner tube.

(3) An unvulcanized rubber composition for forming an outer tube is extruded around the outer periphery of the fiber-reinforced layer to form an outer tube.

(4) The three-layer structure consisting of the inner tube, fiber reinforced layer, and outer tube is integrally vulcanized and molded (150 to 60 m1n). (In this step, the ceramic layer covering the organic fiber thread is fired at a low temperature and hardened by heating, and is firmly bound to the organic fiber thread.) The hose obtained in this way is generally used for automobiles. It is suitable for use as fuel oil, lubricating oil hoses, car air conditioners, etc.

The hose of the present invention can also be manufactured by the following method, which is different from the above method.

(11) An unvulcanized band-shaped rubber composition for forming an inner tube is spirally wound around a mandrel to form an inner tube.

(2) Ceramic-coated organic fiber fabric that has been pre-dipped and dried in the above-mentioned components (E) to CG'), and further dipped in the treatment liquid of the components (A) to (D) and dried on the above-mentioned inner tube. Cloth (boss reinforcing fiber material) is wound in a spiral manner to form a first reinforcing layer.

(3) After forming a first intermediate rubber layer by spirally winding a belt-shaped rubber composition for forming an intermediate rubber layer on the first reinforcing layer, steel wires are placed on top of the first intermediate rubber layer at an appropriate pitch. A second intermediate rubber layer is formed by spirally winding the steel wire, and then spirally winding a band-shaped rubber composition similar to that used in the first intermediate layer on the wound layer of the steel wire.

(4) On the second intermediate rubber layer, a ceramic-coated organic fiber woven fabric (hose reinforcing fiber material) similar to that used in (2) above is spirally wound to form a second fiber reinforcing layer. Form.

(5) A band-shaped rubber composition for forming an outer tube is spirally wound on the second fiber reinforcing layer to form an outer tube.

(6) The laminate obtained through the steps (1) to (5) above is integrally vulcanized and molded (150 to bn). (In this step, the ceramic layer covering the organic fiber woven fabric is fired at a low temperature, heat-cured, and firmly bonded to the fabric.) The hose obtained as described above has a fiber reinforced layer made of ceramic. coated and reinforced with layers and therefore
It has a high degree of resistance to the corrosive properties of transport fluids, and due to the heat resistance of the ceramic layer itself, it also has excellent heat resistance and has an extremely long lifespan as a whole. Therefore, it can withstand use under today's harsh conditions.

〔Effect of the invention〕

As described above, the hose reinforcing fiber material of the present invention includes, for example, RFL as the component (A), a ceramic powder as the component (B), and an ethylene urea compound as the component (C) and an ethylene urea compound as the component (D). Since it is impregnated and coated with a treatment liquid containing one or both of the epoxy-modified phenol formaldehyde condensates and is coated with ceramics, it is not corroded by the transportation fluid flowing inside the hose and has excellent properties such as heat resistance. A ceramic-coated hose reinforcing fiber material, particularly a polyester hose reinforcing fiber, treated with a treatment liquid containing components (A) to (D) and a treatment solution containing components (E) to (F) above. The material exhibits excellent properties. Therefore, a hose having a fiber-reinforced layer made of these materials, such as a fuel oil hose, has a high degree of durability against high temperatures in the engine room, sour gasoline, and the like. In other words, in hoses using the hose reinforcing fiber material of the present invention, the performance of the fiber reinforcement layer is significantly improved, and the fiber reinforcement layer is eroded earlier than the inner and outer tubes, resulting in a shorter hose life. No shortening will occur. Moreover, in the above-mentioned fiber-reinforced layer, the elongation of the ceramic-coated hose-reinforcing fiber material is smaller than that of conventional products, which suppresses the change in diameter under internal pressure loads and provides the effect of preventing loosening of the structure of the fiber-reinforced layer. It becomes like this. As a result, the fiber-reinforced layer acts as a single barrier layer, resulting in low fluid permeability and improved hose performance.

These effects are the same for lubricant transportation and car air conditioners. Furthermore, since the fiber-reinforced layer has excellent chemical resistance, it can be used as a hose for transporting chemicals, solvents, etc., and the same remarkable effects as above can be obtained. Moreover, since the above-mentioned fiber reinforcement layer has excellent properties,
This also makes it possible to reduce the thickness of the inner and outer tube layers.

Next, examples of the present invention will be described together with comparative examples.

[Example 1] 10 g of a 10% caustic soda aqueous solution and 30 g of a 28% ammonia aqueous solution were added to 250 g of water, and the resulting aqueous solution was reacted with an acidic catalyst in the resulting aqueous solution. (40% by weight acetone solution)
60g was added and sufficiently stirred to disperse. On the other hand, 240 g of a 40% water emulsion of vinylpyridine/styrene/butadiene terpolymer latex (manufactured by Nippon Zeon Co., Ltd., Nilapol 251) and 240 g of a 40% water emulsion of styrene/butadiene copolymer (manufactured by Nippon Zeon Co., Ltd., Nilapol LX)
-112>100g was diluted with 200g of water. next,
The above resorcin-formalin initial condensation dispersion was added to this diluted solution while stirring, and 20 g of a 37% formalin aqueous solution was added and mixed uniformly. Then,
In this mixture, diphenylmethane diethylene urea 14
g, 30 of dioctyl sulfosuccinate sodium salt
% aqueous solution (Daiichi Kogyo Seiyaku Co., Ltd., Neocol 5W-30)
5 g of water and 36 g of water were mixed in a ball mill for 24 hours, and an aqueous dispersion obtained was added and mixed. Then, an amount of ceramic material (using silica powder as aggregate) equivalent to the solid content of this mixed solution is added and mixed, and an epoxy compound for phenol/formalin resin tank hardware (manufactured by Ciba Geigy) is added and mixed.

ECN1299) 7.5g to toluene in advance? Dissolve the solution, add 0.1 g of dioctyl sulfosuccinate sodium salt (Neocol P, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) and 0.6 g of methylcellulose, and add and disperse with stirring 28 g of water. were added and mixed to prepare a treatment liquid containing the desired components (A) to (D). Next, a vinylon fiber thread (fiber material for reinforcing hoses) is continuously passed through this treatment liquid to be impregnated with the treatment liquid, and then
It was dried at 0°C for 2 minutes and then heat treated at 250°C for 1 minute to form a ceramic coating layer. In this case, the amount of the treatment agent deposited was 2.5% in terms of solid content. Using the thus obtained ceramic-coated yarn, an inner tube and an outer tube were constructed to manufacture a hose according to a conventionally known method. That is, the inner tube rubber layer 1 (see drawing) is formed by extruding a rubber composition for forming the inner tube from an extruder, and the ceramic-covered yarn is braided around the outer periphery of the extruded inner tube rubber layer 1. A fiber-reinforced layer 2 was formed, and a rubber composition for forming an outer tube was extruded from an extruder to form an outer tube rubber layer 3 on the fiber-reinforced layer 2.

[Example 2] Polyester fiber yarn was used as the organic fiber yarn constituting the fiber reinforcing layer. A hose was made in substantially the same manner as in Example 1 except for this.

[Example 3] Organic fiber yarn for fiber reinforcement layer composition (fiber material for hose reinforcement)
Using a polyester fiber yarn as The material was impregnated with a processing agent. That is, to 6 g of sorbitol polyglycidyl ether (manufactured by Nagashio Sangyo Co., Ltd., Tenacol EX-611), 4 g of a 30% aqueous solution of dioctyl sulfosuccinate sodium salt (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., Neocol SW-30) as a surfactant was added. Dissolved uniformly. Next, this was added to 805 g of water with stirring to uniformly dissolve the sorbitol polyglycidyl ether in the water. Next, 14 g of a phenol block of 4,4-diphenylmethane diisocyanate (manufactured by DuPont, Hiren MP), and 4 g of a 30% aqueous solution of dioctyl sulfosuccinate sodium salt as a surfactant.
and a dispersion obtained by mixing 42 g of water in a ball mill for 24 hours, and 125 g of a 40% water emulsion of vinylpyridine-styrene-butadiene terpolymer (manufactured by Nippon Zeon Co., Ltd., Nirapol 251FS), and mixed uniformly. A treatment liquid consisting of components (E) to (G) was prepared. Next, the polyester fiber thread is passed through this treatment solution.
It was dried at 50°C for 2 minutes, followed by heat treatment at 250°C for 1 minute to achieve a solid content of 2.2%. Next, in the same manner as in Example 1, this was impregnated with a treatment liquid consisting of components (A) to (D) in the same manner. A hose was obtained in the same manner as in Example 1 except for the above.

[Comparative Examples 1 to 4] Vinylon fiber yarn is used as a fiber yarn for reinforcing hoses.

Using polyester fiber yarn, the treatment of the fiber yarn is untreated (
'X, RFL treatment was performed, and this was used. Other than that,
A hose was obtained in the same manner as in Example 1.

The performance of the hoses obtained in the above Examples and Comparative Examples was tested and shown in Table 1 below.

(Margins below) -ac+3 (y3 dimension ・田・1) ・River ・1)
・田I＋＋＋－ーー１s＋＋－７＋＋ん）
JAs is clear from the above table, in the hoses using the hose reinforcing fiber materials of the examples, since the fiber reinforcing layer is composed of the ceramic-coated hose reinforcing fiber materials, they are not susceptible to deterioration due to heat, antifreeze, etc. It has excellent heat and antifreeze resistance. What should also be noted is that the hose using the hose reinforcing fiber material of the example has considerably reduced permeation of fluids such as Freon gas or gasoline compared to the comparative example. This is because, as mentioned earlier, in a hose with a braided fiber reinforced layer of ceramic-coated yarn, the elongation of the fiber yarn is lower than that of the conventional RFL treatment (the rate of decrease in elongation is 10 to 30%). This is because, as a result, changes in the diameter of the hose under internal pressure load conditions are suppressed, and this appears as an effect of preventing the stitches of the braided layer from expanding, thereby suppressing fluid permeation. Moreover, in the hose using the hose reinforcing fiber material of the example, the surface of the hose reinforcing fiber material constituting the fiber reinforcing layer is coated with ceramics,
The rough surface formed by ceramic particles creates an anchoring effect between the hose-reinforcing fiber material and the rubber forming the inner and outer tubes, creating a chemical bond based on the resorcinol and polymerine components of the fiber threads. The force and the physical bonding force based on the above-mentioned anchoring effect work together to significantly improve the mutual adhesive force. As a result, the adhesion between the layers of the hose is improved, and even when the hose is used in a bent manner, no delamination occurs, and the life of the hose is extended.

Note that in the above examples, antifreeze resistance is shown as resistance to fluids, but due to the characteristics of ceramic itself, it has chemical resistance and lubricant resistance.

It has been confirmed that excellent effects are also exhibited in properties such as solvent resistance.

[Brief explanation of the drawing]

The drawing is a sectional view of a hose using a hose reinforcing fiber material according to an embodiment of the present invention. 1... Inner tube rubber layer 2... Fiber reinforcement layer 3... Outer tube rubber layer

Claims (3)

[Claims] (1) A fibrous material for reinforcing hoses consisting of thread or cloth mainly composed of organic fibers and covered with a ceramic layer. (2) A treatment in which the coating with the ceramic layer contains the following components (A) and (B), and at least one of the components (C) and (D), on a thread or cloth mainly composed of organic fibers. The fibrous material for reinforcing a hose according to claim 1, which is obtained by impregnating and coating with a liquid. (A) Resorcinol/formalin/rubber latex. (B) Ceramic powder. (C) Ethylene urea compound. (D) Epoxy-modified phenol formaldehyde condensate. (3) Covering with a ceramic layer covers threads or cloth mainly composed of organic fibers as shown in (E), (F) and (G) below.
) is impregnated and coated with a treatment solution containing the component (E) a polyepoxide compound. (F) Blocked polyisocyanate compound. (G) Rubber latex. Then, the process is carried out by impregnating and coating with a treatment liquid containing the following components (A) and (B) and further containing at least one of components (C) and (D). Fiber material for reinforcing hoses as described in Section 1. (A) Resorcinol/formalin/rubber latex. (B) Ceramic powder. (C) Ethylene urea compound. (D) Epoxy-modified phenol formaldehyde condensate.