JP4816614B2 - Reinforcement hose - Google Patents

Description

  The present invention relates to a reinforcing hose having a reinforcing yarn layer wound with a reinforcing yarn.

  It is well known that the durability and pressure resistance of such a reinforcing hose are affected by the physical properties of the reinforcing yarn itself and the adhesion between the reinforcing yarn and rubber. For this reason, various adhesives have been proposed that use an aramid fiber having excellent physical properties of high strength, low shrinkage, and high Young's modulus while improving the adhesion between the aramid fiber and rubber (Patent Document 1, etc.) ).

JP 9-31854 A JP-A-9-210262

  Since the reinforcing hose is repeatedly used for pumping high-pressure fluid and receives a high-pressure load repeatedly, it is necessary to suppress the displacement of the reinforcing yarn sandwiched between the rubber layers in order to ensure durability and pressure resistance. In the above patent document, the displacement of the reinforcing yarn sandwiched between the rubber layers is suppressed by the adhesive strength exhibited by the adhesive, but further improvement has been desired.

  The present invention has been made to solve the above-described problems, and has an object to enhance the effectiveness of suppressing the displacement of the reinforcing yarn sandwiched between the rubber layers, and to maintain and improve durability and pressure resistance.

  In order to achieve this object, the reinforcing hose of the present invention and the manufacturing method thereof employ the following configurations.

[Application 1: Reinforced hose]
A reinforcing hose having a reinforcing yarn layer wound with a reinforcing yarn,
An inner rubber layer that is formed using acrylic rubber and is located on the innermost hose side of the hose to form a fluid flow path;
A reinforcing yarn layer formed by winding an aramid fiber as a reinforcing yarn on the inner rubber layer;
Laminated on the reinforcing yarn layer, and provided with an outer surface rubber layer formed using the rubber of the same system as the inner surface rubber layer,
The reinforcing yarn of the reinforcing yarn layer is
The reinforcing yarn surface is coated with an adhesive layer containing an adhesive having a functional group that causes a chemical bond with an amide group,
In adhering to the inner surface rubber layer and the outer surface rubber layer, the bonding between the aramid fiber and the adhesive layer is performed using a crosslinking agent having a functional group that causes a chemical bond with the adhesive and the acrylic rubber. A first chemical bond with an agent, a second chemical bond between the cross-linking agent and the adhesive of the adhesive layer, and the acrylic material as a constituent material of the cross-linking agent, the inner rubber layer and the outer rubber layer The gist of the present invention is to chemically bond and adhere to the inner rubber layer and the outer rubber layer by a third chemical bond with rubber.

  When using the cross-linking agent to bond the reinforcing yarn of the reinforcing yarn layer to the inner rubber layer and the outer rubber layer, the adhesive layer on the surface of the reinforcing yarn is covered with a cross-linking agent layer containing the cross-linking agent. By laminating the inner rubber layer, the reinforcing yarn layer, and the outer rubber layer, or forming the inner rubber layer and the outer rubber layer using the acrylic rubber blended with the crosslinking agent. The reinforcing yarns of the reinforcing yarn layer can be chemically bonded to and bonded to the inner rubber layer and the outer rubber layer by the first to third chemical bonds.

A reinforcing hose having the above-described configuration is a reinforcing hose that forms a reinforcing yarn layer by positioning a reinforcing yarn layer between an inner rubber layer of acrylic rubber and an outer rubber layer using rubber of the same system as the rubber layer. The aramid fiber, which is a yarn, has an adhesive layer made of an adhesive having a functional group that causes a chemical bond with an amide group and a functional group that causes a chemical bond between the adhesive and acrylic rubber from the reinforcing yarn surface side. It is laminated and coated with a crosslinking agent layer made of a crosslinking agent. Or the said adhesive bond layer which coat | covered the reinforcement thread | yarn surface of the aramid fiber contacts the crosslinking agent mix | blended with the said acrylic rubber which is a constituent material of an inner surface rubber layer and an outer surface rubber layer. The inner rubber layer and the outer rubber layer are acrylic rubbers or rubbers of the same system as the acrylic rubber, and thus are vulcanized and bonded in the manufacturing process, and the reinforcing yarn layer therebetween is sandwiched. The aramid fiber is located between the inner rubber layer or the outer rubber layer with the adhesive layer and the cross-linking material layer as described above, with the adhesive layer on the fiber surface side and the cross-linking material layer on the rubber layer side. The first chemical bond between the aramid fiber and the adhesive of the adhesive layer, the second chemical bond between the adhesive and the cross-linking agent of the cross-linking agent layer, and the cross-linking agent and the inner rubber layer / outer surface The rubber layer is formed by a third chemical bond with the acrylic rubber, and is chemically bonded and bonded to the inner rubber layer and the outer rubber layer. In other words, according to the above-mentioned reinforcing hose that bonds the aramid fiber that is the reinforcing yarn by chemical bonding, the reinforcing yarn displacement is suppressed more effectively than when the reinforcing yarn is suppressed by the adhesive strength exhibited by the adhesive itself. As a result, the durability and pressure resistance of the hose can be maintained and improved more reliably.

  In this case, even when the adhesive layer covering the reinforcing yarn surface of the aramid fiber is in contact with the crosslinking agent blended in the acrylic rubber that is a constituent material of the inner rubber layer and the outer rubber layer, By the first to third chemical bonds, the aramid fiber reinforcing yarns are chemically bonded and bonded to the inner rubber layer and the outer rubber layer. Therefore, even in such a form, since the displacement of the reinforcing yarn can be suppressed with high effectiveness, the durability and pressure resistance of the hose can be more reliably maintained and improved.

  In this case, since the inner rubber layer and the outer rubber layer are acrylic rubbers, it is possible to use an adhesive as an isocyanate adhesive and a cross-linking agent as a diamine-based cross-linking agent. It is easy to plan. If the adhesive layer is formed by adhering the isocyanate-based adhesive to the reinforcing yarn surface at 0.3 to 5 wt%, the use of the above-mentioned chemical bond while suppressing the use of excess adhesive Adhesion can be achieved.

[Application 2: Manufacturing method of reinforcing hose]
In the method of manufacturing a reinforcing hose in which a reinforcing yarn layer having an aramid fiber as a reinforcing yarn is interposed between an inner rubber layer made of acrylic rubber and an outer rubber layer,
Forming the inner rubber layer around the mandrel for extrudate support by extruding acrylic rubber; and
Forming a reinforcing yarn layer by winding the aramid fiber as a reinforcing yarn around the inner rubber layer supported by a mandrel;
A step of laminating the outer rubber layer on the reinforcing yarn layer by extruding acrylic rubber on the outer periphery of the reinforcing yarn layer,
In the step of forming the reinforcing yarn layer,
In this order, the aramid fiber is divided into a reservoir for an adhesive having a functional group that causes a chemical bond with an amide group, and a reservoir for a crosslinking agent having a functional group that causes a chemical bond to the adhesive and acrylic rubber. The gist is that after the immersion, the inner rubber layer is wound around the outer periphery.

[Application 3: Other manufacturing method of reinforcing hose]
In the method of manufacturing a reinforcing hose in which a reinforcing yarn layer having an aramid fiber as a reinforcing yarn is interposed between an inner rubber layer made of acrylic rubber and an outer rubber layer,
Forming the inner rubber layer around the mandrel for extrudate support by extruding acrylic rubber; and
Forming a reinforcing yarn layer by winding the aramid fiber as a reinforcing yarn around the inner rubber layer supported by a mandrel;
A step of laminating the outer rubber layer on the reinforcing yarn layer by extruding acrylic rubber on the outer periphery of the reinforcing yarn layer,
In the step of forming the reinforcing yarn layer, after the aramid fiber is immersed in a storage tank of an adhesive having a functional group that causes a chemical bond with an amide group, it is subjected to winding on the outer periphery of the inner rubber layer,
In the step of forming the inner rubber layer and the step of forming the outer rubber layer, the acrylic rubber is blended with a crosslinking agent having a functional group that causes chemical bonding with the adhesive and the acrylic rubber. The gist is to extrude acrylic rubber.

  According to the method for manufacturing a reinforcing hose having the above-described configuration, it is possible to easily manufacture a reinforcing hose formed by bonding aramid fibers, which are reinforcing yarns, to the inner rubber layer and the outer rubber layer by chemical bonding.

  In order to further clarify the configuration and operation of the present invention described above, preferred embodiments of the present invention will be described below. FIG. 1 is an explanatory view schematically showing a reinforcing hose 10 of this embodiment together with the state of lamination.

  As shown in FIG. 1, the reinforcing hose 10 of this embodiment includes an inner rubber layer 12 on the hose flow path side, and a reinforcing yarn layer 16 is provided between the rubber layer and the outermost outer rubber layer 14 of the hose. Prepare. The reinforcing hose 10 is formed using acrylic rubber, and is located on the innermost layer side of the hose to form a fluid flow path. In this example, a copolymer of alkyl acid ester and 2-chloroethyl vinyl ester (hereinafter, ACM) was employed as the acrylic compound rubber. The outer rubber layer 14 is formed of the same ACM as the inner rubber layer 12 and forms the outer skin of the reinforcing hose 10. The reinforcing yarn layer 16 is formed by using an aramid fiber as the reinforcing yarn, and driving this aramid fiber into the inner rubber layer 12 by a driving device after immersion in a chemical solution described later. In this example, a fiber obtained by twisting an aramid fiber was used, and the number of driving of the fiber was set to 32 (32 punches × 2). It is also possible to make the reinforcing yarn layer 16 by carrying out the insertion twice.

  The layer thicknesses of the inner rubber layer 12 and the outer rubber layer 14 of the reinforcing hose 10 are determined in consideration of heat resistance, oil penetration resistance, etc. For example, when the inner diameter φ of the reinforcing hose 10 is 50 mm, the inner surface The rubber layer 12 was about 2.6 mm, and the outer rubber layer 14 was about 2.4 mm. The driving angle of the reinforcing yarn layer 16 is also determined in consideration of durability and pressure resistance. In this embodiment, the driving angle is set to about 56 °.

  Next, a method for manufacturing the reinforcing hose 10 will be described. FIG. 2 is an explanatory view showing the pretreatment of the reinforcing yarn for forming the reinforcing yarn layer 16 in the reinforcing hose 10, and FIG. 3 is an explanatory view for explaining the hose manufacturing apparatus 110.

  As shown in FIG. 2, the reinforcing yarn pretreatment process unit 100 includes a fiber holding bobbin 103 that winds and holds the aramid fiber F, a first chemical liquid tank 104, a second chemical liquid tank 106, and an intermediate bobbin 108. It has a fiber delivery system consisting of these devices. The 1st chemical | medical solution tank 104 is an adhesive agent, Comprising: The polyisocyanate which has an isocyanate group which raise | generates a chemical bond with the amide group of an aramid fiber is stored. The second chemical tank 106 causes a chemical bond with the above-mentioned adhesive polyisocyanate and acrylic rubber, specifically, a chemical bond with the isocyanate group of the polyisocyanate and a chemical bond with the carboxyl group of the acrylic rubber. A crosslinking agent having an amine group (for example, 4,4 diaminodicyclohexylmethane, 6-aminohexylcarbamic acid, etc.) is stored.

  The aramid fiber F wound up on the fiber holding bobbin 103 is fed and conveyed from the bobbin by the conveying roller R shown in the drawing, and is immersed in the polyisocyanate while passing through the first chemical tank 104 and this polyisocyanate. Covered with. The aramid fiber F is dried by the drier 109 to fix the polyisocyanate coating layer FP, and is then immersed in a cross-linking agent and covered with the cross-linking agent while passing through the second chemical solution tank 106. Is done. Next, the aramid fibers F are dried by the drier 109 to fix the cross-linking agent layer on the polyisocyanate coating layer FP, and are wound on the intermediate bobbin 108. The aramid fiber F wound up in this way is shown in FIG. 3 in a state where each layer of the polyisocyanate coating layer FP on the surface side and the cross-linking agent layer FK on the surface is fixed at a weight equivalent to about 1 wt% as a drug dipping amount. It is supplied to the hose manufacturing apparatus 110.

  As shown in FIG. 3, the hose manufacturing apparatus 110 includes a first extruder 140, a blade apparatus 150, and a second extruder 160. The first extruder 140 is an apparatus for forming an extruded body 20A (inner rubber layer 12) by extruding ACM as a rubber material. The blade device 150 is a device for forming the reinforcing yarn layer 16 on the extruded body 20A, and includes a bobbin carrier (not shown) attached to the drum 152. Since the aramid fiber F as the reinforcing yarn is supplied from the intermediate bobbin 108 shown in FIG. 2 to the drum 152, the blade device 150 feeds the aramid fiber F from the bobbin carrier of the drum 152 onto the extruded body 20A. The reinforcing yarn layer 16 is formed by blades. The second extruder 160 is an apparatus for forming the outer rubber layer 14, and the outer rubber layer 14 is formed by extruding ACM as a rubber material from the outer tube extruding portion 161.

  Next, a series of manufacturing steps of the reinforcing hose 10 of this embodiment will be described with reference to FIG. By extruding ACM from the first extruder 140, a cylindrical extruded body 20A is formed. When the extruded body 20A is extruded, the mandrel Md is inserted into the space 20a that forms the flow path of the extruded body 20A.

  Subsequently, the extruded body 20A is sent to the blade device 150, and the aramid fiber F as the reinforcing yarn is fed out from the bobbin by the rotation of the drum 152 of the blade device 150, whereby the reinforcing yarn layer 16 is formed on the extruded body 20A. It is formed. That is, in a state where the extruded body 20A immediately after being extruded by the first extruder 140 is supported by the mandrel Md, the aramid fiber F as the reinforcing thread is wound around the outer periphery of the extruded body 20A, and the reinforcing thread layer 16 is formed. It is formed. At this time, the extruded body 20A is not crushed because it is supported by the mandrel Md. Next, an ACM for forming the outer rubber layer 14 is laminated on the reinforcing yarn layer 16 by the second extruder 160. That is, the rubber material (ACM) for forming the outer rubber layer 14 is supplied directly onto the reinforcing yarn layer 16.

  Subsequently, a vulcanization step is performed. In the vulcanization step, secondary vulcanization at 150 to 170 ° C. for 4 to 12 hours was performed after primary vulcanization at 150 to 170 ° C. for 20 to 60 minutes. By this vulcanization process, the inner rubber layer 12 and the outer rubber layer 14 are joined by performing ordinary vulcanization adhesion. This vulcanization adhesion occurs inside the reinforcing yarn and the mesh lattice of the reinforcing yarn in FIG. Thereby, the reinforcing yarn layer 16 is sandwiched between the inner rubber layer 12 and the outer rubber layer 14 to obtain a reinforcing hose 10 in which these layers are integrated.

  In this vulcanization process, the aramid fibers F of the reinforcing yarn layer 16 are bonded to the inner rubber in parallel with the vulcanization adhesion of the inner rubber layer 12 and the outer rubber layer 14 sandwiching the reinforcing yarn layer 16 in a sandwich shape. The following adhesion occurs at the interface contacting the layer 12 or the outer rubber layer 14. FIG. 4 is an explanatory view for explaining the state of adhesion at the interface of each layer including the reinforcing yarn of the reinforcing yarn layer.

  As shown in the figure, at the interface between the aramid fiber F and the polyisocyanate coating layer FP that coats it, the fiber constituent molecules having amide groups on the fiber surface of the aramid fiber F react with the polyisocyanate of the polyisocyanate coating layer FP. The amide group of the aramid fiber F and the isocyanate group are expected to cause a chemical bond. At the interface between the polyisocyanate coating layer FP and the cross-linking agent layer FK, it is expected that the polyisocyanate and the cross-linking agent react to cause a chemical bond between the isocyanate group of the polyisocyanate and the amine group of the cross-linking agent. At the interface between the crosslinking agent layer FK and the inner rubber layer 12 or the outer rubber layer 14, the crosslinking agent of the crosslinking agent layer FK reacts with the acrylic rubber, and the amine group of the crosslinking agent and the carboxyl group of the acrylic rubber imide. It is expected to cause cross-linking chemical bonds.

  That is, in the reinforcing hose 10 of the present embodiment, when the aramid fiber F is bonded to the inner rubber layer 12 or the outer rubber layer 14, the polyisocyanate coating layer FP and the cross-linking agent layer FK are laminated and interposed. The aramid fibers F are bonded to the inner rubber layer 12 and the outer rubber layer 14 by chemical bonding at the interface of each layer. Therefore, according to the reinforcement hose 10, the displacement of the aramid fiber F, which is the reinforcement yarn of the reinforcement yarn layer 16, is suppressed more effectively than when the reinforcement yarn displacement is suppressed by the adhesive strength exhibited by the adhesive itself by improving the adhesive. As a result, the durability and pressure resistance of the hose can be maintained and improved more reliably.

  Next, demonstration of the advantages of the reinforcing hose 10 of this embodiment will be described. FIG. 5 is an explanatory diagram showing a state in which the pressure repetition pressure resistance in a high temperature environment is examined. The reinforcing hose 10 according to the present embodiment has an S-shaped piping path, and the pressure source side plug HC and the plug plug MC are attached to both ends with the path maintained, and fastened by the fastening belt B. This belt fastening torque is about 6 Nm. The pressurizing source side plug HC is connected to the main pipe MH from the pressurizing pump P, and the pressurizing pump P pressurizes the pressurized fluid into the reinforcing hose 10 through the main valve MV. A fluid discharge pipe EH branches from the main pipe MH, and the pressurized fluid is discharged by opening the discharge valve EV after closing the main valve MV. In this pressurization repeated pressure resistance test (repetitive pressurization test), the reinforcing hose 10 (sample hose) in which the above-described pressurization source side plug HC and the like have been set is placed in a high temperature environment of 140 ° C. and pressurized at 220 KPa. -It used for the test which repeats release (0 KPa). This pressurization / release was repeated at intervals of about 1.5 seconds.

  In the reinforcing hose 10 of the present embodiment, in this repeated pressure and pressure resistance test, it can withstand repeated pressure exceeding 480,000 times and greatly exceeds the target pressure and pressure resistance (300,000 times) in the above environment. It was demonstrated that it was obtained.

  As this comparative example, a comparative example hose that does not use the cross-linking agent layer FK or the polyisocyanate coating layer FP and that does not have an adhesion treatment was manufactured, and the above-mentioned pressure repeated pressure resistance was examined. Only a durability of about 200,000 times was obtained. From this comparison, it was proved that according to the reinforcing hose 10 of the present embodiment, it is possible to improve the durability and pressure resistance of the hose through suppressing the yarn displacement with high effectiveness.

  In addition, a verification test was conducted on the displacement of the reinforcing yarn. FIG. 6 is an explanatory view showing a state of a verification test for reinforcing yarn misalignment. As shown in the figure, in this demonstration test, both ends of the hose are fixed to the fixture J while maintaining the S-shaped piping path, and four locations (upper and lower ends Su, Sd and left and right ends Sr, In S1), the inner rubber layer 12 is peeled to expose the reinforcing yarn (aramid fiber F) of the reinforcing yarn layer 16. And the hook FF was hooked on this exposed aramid fiber F, the said hook was pulled away from the hose, and the load applied to the hook at that time was measured. FIG. 7 is an explanatory view showing a hook load state of the comparative hose using the reinforcing hose 10 of this embodiment and the aramid fiber F without the adhesion treatment. The reinforcing yarn displacement test using the hook hook FF was performed in a normal temperature environment and a high temperature environment (about 180 ° C.). In the measurement, when the hook FF hooked on the aramid fiber F was pulled away from the hose surface, the load when the aramid fiber F was detached or the load when the aramid fiber F was broken was measured.

  As shown in the figure, in the comparative example hose, at normal temperature, the target displacement load (target displacement resistance load) 45N of the target reinforcing yarn was satisfied, but at any measurement location in a high temperature environment where rubber softening could occur. The result was less than the target displacement load 45N. However, in the reinforcing hose 10 of this example, the aramid fibers F were observed to drop out only when a load exceeding 3 times the target deviation load was applied at any measurement location at room temperature. Further, even under a high temperature environment, when a load about three times the target deviation load was applied, the aramid fiber F was disconnected or the aramid fiber F itself was cut (cut).

  Also from the result of the deviation test of the aramid fiber F, it was proved that the reinforcement yarn deviation can be suppressed with high effectiveness according to the reinforcing hose 10 of the present example. Therefore, it was found that the hose durability and pressure resistance can be improved.

  The above-mentioned reinforcing yarn displacement was examined by setting each layer of the polyisocyanate coating layer FP and the crosslinking agent layer FK on the aramid fiber F to be about 1%, but the polyisocyanate coating layer FP was 0.3 to 5 wt% ( If it is preferably 0.5 to 3 wt%, there was no problem in practical reinforcing yarn displacement. In addition, regarding the crosslinking agent layer FK, there was no problem in practical reinforcing yarn displacement even at 0.3 to 3 wt%. In other words, it can be said that by forming a layer in these ranges, a highly practical reinforcing hose can be obtained while reducing the amount of polyisocyanate (adhesive) and crosslinking agent used.

  Next, another embodiment will be described. In this example, only the polyisocyanate coating layer FP was formed on the aramid fiber F, and the crosslinking agent was included in the inner rubber layer 12 and the outer rubber layer 14. That is, the aramid fiber F on which the polyisocyanate coating layer FP is formed through the polyisocyanate coating by the first chemical tank 104 in FIG. 2 is wound around the bobbin, and the aramid fiber F is supplied to the blade device 150 in FIG. In addition, when the rubber material (ACM) is extruded by the first extruder 140 and the second extruder 160 in the hose manufacturing apparatus 110, a crosslinking agent (the crosslinking agent having an amine group described above) is pre-blended with the rubber material. Thus, the extruded body 20A (inner rubber layer 12) and outer rubber layer 14 were formed. In other words, the rubber material (ACM) and the cross-linking agent (the cross-linking agent described above having an amine group) are compounded and kneaded in a kneader in the pre-process of the extrusion process by the extruder, and the rubber material after kneading is mixed. The first extruder 140 and the second extruder 160 are supplied. In addition, the reinforcement hose 10 was manufactured by the manufacturing process demonstrated using FIG. 3 other than the mixing | blending of such a crosslinking agent. The same applies to the vulcanization process.

  Also for the reinforcing hose 10 manufactured through the blending of the crosslinking agent into the rubber material, a demonstration test of the reinforcing yarn displacement shown in FIG. 6 was performed. In the reinforcing hose 10 of the example used for this experiment, the polyisocyanate coating layer FP formed by the first chemical tank 104 is made into three types of 0.5 wt%, 1.5 wt%, and 3 wt%, and the blending of the crosslinking agent is 1 wt%. %. In addition, it is preferable from a viewpoint of the reduction of the usage-amount that a crosslinking agent shall be 0.3-3 wt% of range. As a result of the reinforcing yarn misalignment test for each type of reinforcing hose 10, the suppression of the reinforcing yarn misalignment to the same extent as that of the example product shown in FIG.

  The embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the present invention.

It is explanatory drawing which shows schematically the reinforcement hose 10 of a present Example with the mode of the lamination | stacking. FIG. 3 is an explanatory view showing pretreatment of a reinforcing yarn for forming a reinforcing yarn layer 16 in the reinforcing hose 10. It is explanatory drawing explaining the hose manufacturing apparatus 110. FIG. It is explanatory drawing explaining the mode of adhesion | attachment in the interface of each layer including the reinforcement thread | yarn of a reinforcement thread | yarn layer. It is explanatory drawing which shows a mode that the pressurization repetition pressure | voltage resistance in a high temperature environment is investigated. It is explanatory drawing which shows the mode of the verification test of a reinforcement thread | yarn deviation. It is explanatory drawing which shows the mode of the hook load about the comparative example hose using the reinforcement hose 10 and the aramid fiber F without an adhesion | attachment process of a present Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Reinforcement hose 12 ... Inner surface rubber layer 14 ... Outer surface rubber layer 16 ... Reinforcement yarn layer 20A ... Extrudate 100 ... Reinforcement yarn pretreatment process part 102 ... Hose formation part 103 ... Fiber holding bobbin 104 ... 1st chemical | medical solution tank 106 ... 1st 2 chemical tank 108 ... intermediate bobbin 109 ... dryer 110 ... hose manufacturing device 140 ... first extruder 150 ... blade device 152 ... drum 160 ... second extruder B ... fastening belt EH ... piping EV ... discharge valve F ... aramid fiber FF ... Hook hook FK ... Cross-linking agent layer FP ... Polyisocyanate coating layer HC ... Pressure source side plug J ... Fixture fixture Md ... Mandrel MC ... Mekra plug MH ... Main piping MV ... Main valve P ... Pressure pump R ... Conveying roller

Claims (7)

A reinforcing hose having a reinforcing yarn layer wound with a reinforcing yarn,
An inner rubber layer that is formed using acrylic rubber and is located on the innermost hose side of the hose to form a fluid flow path;
A reinforcing yarn layer formed by winding an aramid fiber as a reinforcing yarn on the inner rubber layer;
Laminated on the reinforcing yarn layer, and provided with an outer surface rubber layer formed using the rubber of the same system as the inner surface rubber layer,
The reinforcing yarn of the reinforcing yarn layer is
The reinforcing yarn surface is coated with an adhesive layer containing an adhesive having a functional group that causes a chemical bond with an amide group,
In adhering to the inner surface rubber layer and the outer surface rubber layer, the bonding between the aramid fiber and the adhesive layer is performed using a crosslinking agent having a functional group that causes a chemical bond with the adhesive and the acrylic rubber. A first chemical bond with an agent, a second chemical bond between the cross-linking agent and the adhesive of the adhesive layer, and the acrylic material as a constituent material of the cross-linking agent, the inner rubber layer and the outer rubber layer A reinforcing hose that is chemically bonded and bonded to the inner rubber layer and the outer rubber layer by a third chemical bond with rubber. The reinforcing hose according to claim 1,
The adhesive layer on the surface of the reinforcing yarn is covered with a cross-linking agent layer containing the cross-linking agent, and the inner rubber layer, the reinforcing yarn layer, and the outer rubber layer are laminated, and the first to third chemicals are laminated. A reinforcing hose in which the reinforcing yarn of the reinforcing yarn layer is chemically bonded and bonded to the inner rubber layer and the outer rubber layer by bonding. The reinforcing hose according to claim 1,
The inner rubber layer and the outer rubber layer are formed using the acrylic rubber blended with the crosslinking agent, and the inner rubber layer, the reinforcing yarn layer, and the outer rubber layer are laminated, and the first rubber layer is laminated. A reinforcing hose in which the reinforcing yarn of the reinforcing yarn layer is chemically bonded and bonded to the inner rubber layer and the outer rubber layer by a third chemical bond. The reinforcing hose according to any one of claims 1 to 3,
The adhesive is an isocyanate adhesive,
The reinforcing hose, wherein the crosslinking agent is a diamine-based crosslinking agent.   The reinforcing hose according to claim 4, wherein the isocyanate-based adhesive is attached to the surface of the reinforcing yarn at 0.3 to 5 wt% to form the adhesive layer. In the method of manufacturing a reinforcing hose in which a reinforcing yarn layer having an aramid fiber as a reinforcing yarn is interposed between an inner rubber layer made of acrylic rubber and an outer rubber layer,
Forming the inner rubber layer around the mandrel for extrudate support by extruding acrylic rubber; and
Forming a reinforcing yarn layer by winding the aramid fiber as a reinforcing yarn around the inner rubber layer supported by a mandrel;
A step of laminating the outer rubber layer on the reinforcing yarn layer by extruding acrylic rubber on the outer periphery of the reinforcing yarn layer,
In the step of forming the reinforcing yarn layer,
In this order, the aramid fiber is divided into a reservoir for an adhesive having a functional group that causes a chemical bond with an amide group, and a reservoir for a crosslinking agent having a functional group that causes a chemical bond to the adhesive and acrylic rubber. A method of manufacturing a reinforcing hose , which is subjected to winding around the outer periphery of the inner rubber layer after being immersed. In the method of manufacturing a reinforcing hose in which a reinforcing yarn layer having an aramid fiber as a reinforcing yarn is interposed between an inner rubber layer made of acrylic rubber and an outer rubber layer,
Forming the inner rubber layer around the mandrel for extrudate support by extruding acrylic rubber; and
Forming a reinforcing yarn layer by winding the aramid fiber as a reinforcing yarn around the inner rubber layer supported by a mandrel;
A step of laminating the outer rubber layer on the reinforcing yarn layer by extruding acrylic rubber on the outer periphery of the reinforcing yarn layer,
In the step of forming the reinforcing yarn layer, after the aramid fiber is immersed in a storage tank of an adhesive having a functional group that causes a chemical bond with an amide group, it is subjected to winding on the outer periphery of the inner rubber layer,
In the step of forming the inner rubber layer and the step of forming the outer rubber layer, the acrylic rubber is blended with a crosslinking agent having a functional group that causes chemical bonding with the adhesive and the acrylic rubber. A method of manufacturing a reinforcing hose that extrudes acrylic rubber.

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