JPH11108261A - Hose and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hose wherein a hose tube, fiber reinforced layer and a hose cover are firmly bonded, flexibility is provided in a bonding part, durability is excellent relating to repeated impact force by a high pressure. SOLUTION: This hose 1 is constituted so as to have a hose tube 2, at least a layer of fiber reinforced layer 3, and a hose cover 4. Here, in the case of providing the fiber reinforced layer 3, hose tube 2, hose cover 4 and a plurality fiber reinforced layer 3, a magnetic unit for bonding at least one selected from the other fiber reinforced layer and/or thermoplastic resin bonding layers 5, 6 dispersing an electric conductor are provided between them and the fiber reinforced layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a magnetic material, and / or
Alternatively, a thermoplastic resin having a conductor dispersed therein is provided in at least one of a hose tube layer, a fiber reinforcement layer, and a hose cover layer, and the magnetic material and / or the conductor is induction-heated by high frequency. The present invention relates to a hose excellent in durability by generating heat and melting a thermoplastic resin, whereby a fiber reinforcing layer and another layer are firmly bonded to each other, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Hitherto, various proposals have been made for strengthening interlayer adhesion in a hose using a thermoplastic resin. For example, there is a method in which a polar material in a polymer or a polar material in a polymer is vibrated by a microwave of 1 GHz to 100 GHz to generate heat, and an adhesive such as nylon, epoxy, or unsaturated polyester is melt-bonded to a metal, a film, wood, or the like. It is already industrialized (Adhesion Society of Japan, Adhesion Handbook, p. 147). Also, a magnetic substance or a conductor is kneaded into a thermoplastic resin such as PE or ABS, and a high-frequency current is applied to the mixture to melt the polyolefin or styrene. A method of bonding the series resins has also been proposed (Polyfile, June 1987). Although there was an attempt to use the above method for hose adhesives, in the microwave heating method, the nylon fiber and polyester fiber used as a reinforcing agent were melted by heating with microwave, so the hose strength was low. It ’s going to drop,
Even the induction heating method has not been adopted as a hose because of problems such as the control of the melt viscosity of the adhesive at the time of heating and the deterioration of the adhesive properties due to the addition of a large amount of conductor. In addition, as a method of using an adhesive having a strong adhesive force, a resin such as nylon or polyester elastomer is used for a hose tube, a galvanized hard steel wire or the like is used for a reinforcing layer, and a polyolefin resin layer having a functional group is provided between each layer. A plastic hose interposed as an adhesive layer is disclosed in JP-A-55-9794.
No. 8 discloses this. However, a hose using such an adhesive having a strong adhesive strength is not sufficient in flexibility and durability. In addition, as a method of heating the metal wire used for the reinforcing layer and uniformly melting the synthetic resin for bonding to increase the bonding strength, a bonding sheet coated with an epoxy resin or the like between a hose inner layer and a jacket. And a wire-reinforced plastic hose having two layers of wire-reinforced layers sandwiching a synthetic resin sheet.
Japanese Patent Application Laid-Open No. 54-159468 discloses a method for producing a wire-reinforced plastic hose in which a bonding sheet and a jacket are bonded by induction heating of a wire to generate heat. However, in many cases, fibers are used instead of metal wires for the reinforcing layer. In such a case, the bonding sheet is melted by using the heat generated by the wire by induction heating, and the reinforcing layer is bonded to the bonding sheet and the jacket. Method cannot be used.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hose tube, a fiber reinforcing layer and a hose cover which are firmly adhered to each other, have a flexible adhesive portion, and have high durability against repeated impacts caused by high pressure. It is to provide an excellent hose.

[0004]

That is, the present invention relates to a hose having a hose tube, at least one fiber reinforced layer, and a hose cover, wherein the fiber reinforced layer, the hose tube, the hose cover, and the fiber reinforcement are provided. When there are a plurality of layers, a magnetic material for bonding to at least one selected from other fiber reinforcement layers and / or a thermoplastic resin bonding portion in which a conductor is dispersed is provided between the fiber reinforcement layers. Provide a hose.

The thermoplastic resin bonded portion has a volume fraction of 1
Preferably, up to 20% of a magnetic and / or conductive material is dispersed.

[0006] The present invention also provides a method of heating the magnetic material and / or the conductor by high-frequency induction heating to heat and melt the thermoplastic resin, thereby forming the fiber reinforced layer and the thermoplastic resin. To provide a method for manufacturing a hose that bonds an adjacent layer to the hose.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The hose of the present invention is a hose having at least a hose tube, a fiber reinforcing layer, and a hose cover, and each layer is joined by an adhesive layer. The hose tube and the hose cover may be formed in one or more layers, respectively, and the fiber reinforcing layer may be in one layer or in multiple layers. The hose of the present invention will be described based on one embodiment example shown in the accompanying drawings. FIG. 1 is an explanatory front view showing the hose of the present invention with each layer cut away. The hose 1 includes a hose tube 2, a fiber reinforcement layer 3, and a hose cover 4.
And adhesive layers 5 and 6 between the fiber reinforced layer and the hose tube and between the fiber reinforced layer and the hose cover, respectively. The fiber reinforcing layer 3 of the hose 1 of the present invention is formed by braiding reinforcing fibers, and the adhesive layers 5 and 6 between the hose tube and the hose cover and the fiber reinforcing layer are made of a magnetic material and / or a conductor. And a thermoplastic resin dispersed therein.

The compound forming the hose tube 2 and the hose cover 4 is generally a hose tube of a hose,
A thermoplastic resin used as a hose cover can be used, and a thermoplastic elastomer composition obtained by crosslinking at least a part of an elastomer component obtained by dispersing an elastomer component in a thermoplastic resin matrix phase can also be used. Nylon 1 as the thermoplastic resin
1, nylon 12, nylon 666, copolymers of nylon 6 or nylon 66 with polyether, polyester resin, polyester elastomer, polyurethane resin, polyvinyl chloride resin, and the like.

The above-mentioned thermoplastic elastomer composition is a composition in which an elastomer component is dispersed in a thermoplastic resin matrix phase. Examples of the thermoplastic resin used as the thermoplastic resin matrix phase include polyolefin resins, polyamide resins, polyester resins, polynitrile resins, polymethacrylate resins, polyvinyl resins, cellulose resins, fluorine resins, and imide resins. And thermoplastic elastomers. Examples of the elastomer component include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), chloroprene rubber (CR), acrylonitrile butadiene rubber (NBR), butyl rubber (IIR), Ethylene propylene diene rubber (EP
DM), epichlorohydrin rubber (CO), vinyl methyl silicone rubber (VMQ) and the like. These rubbers may be used alone or in combination of two or more. Of these, hose covers include ethylene-propylene-diene rubber, chloroprene rubber, butyl rubber, halogenated butyl rubber, vinyl methylsilicone rubber, etc., which have excellent weather resistance, butadiene rubber, which has excellent wear resistance, and styrene, which is resistant to bending cracks. -Butadiene rubber or the like is preferably used. For the hose tube, ethylene-propylene-diene rubber, which is easy to obtain high strength, chloroprene rubber excellent in oil resistance and chemical resistance, acrylonitrile-butadiene rubber excellent in oil resistance, epichlorohydrin rubber and the like are preferably used. Among them, a thermoplastic elastomer composition using a polypropylene resin (PP) as a matrix phase and ethylene-propylene-diene rubber (EPDM) as an elastomer component is particularly preferable. The ratio between the thermoplastic resin and the elastomer component in the thermoplastic elastomer composition is not particularly limited, but the elastomer component is preferably 10 to 90% by weight based on the weight of the thermoplastic resin, and the flexibility of the resulting composition is high. It is preferable from the viewpoint of processability. The elastomer component in the thermoplastic elastomer composition is at least partially crosslinked. The method for crosslinking the elastomer component is not particularly limited, and may be a conventionally known method.For example, a thermoplastic resin component and an elastomer component containing no crosslinking agent are melt-kneaded by a twin-screw kneading extruder or the like, It can be formed by adding a crosslinking agent for crosslinking the elastomer component while dispersing the elastomer component as a dispersed phase (domain) in the thermoplastic resin matrix phase, and dynamically crosslinking during kneading. Also, as the dynamic crosslinking, vulcanizing agents for general rubbers, that is, sulfur-based, organic peroxide-based,
Cross-linking can also be performed while kneading at a temperature of 150 to 300 ° C. using a cross-linking agent such as a metal oxide, a phenol resin, and quinone dioxime.

The composition for forming the hose tube and the hose cover of the hose of the present invention contains a plasticizer, a vulcanizing agent, a vulcanization accelerator, an antioxidant, and an antioxidant within a range not to impair the object of the present invention. Agents, ultraviolet absorbers, coloring agents, and reinforcing materials.

The reinforcing layer in the hose of the present invention uses reinforcing fibers. As such fibers, specific elastic modulus, polyester fiber excellent in specific strength, nylon fiber,
Aramid fibers and the like can be mentioned. Among these, polyester fibers are preferred. The reinforcing fiber can be formed by braiding, for example, into a blade shape or a spiral shape.

[0012] The hose of the present invention has an interlayer between the fiber reinforced layer and the hose tube, an interlayer between the fiber reinforced layer and the hose cover,
Further, when there are a plurality of fiber reinforced layers for improving the hose durability, at least one of the fiber reinforced layers is provided.
The layer has a magnetic material and / or an adhesive layer containing a thermoplastic resin obtained by dispersing a conductor. The thermoplastic resin contained in the adhesive layer preferably has a functional group.
This is because the adhesiveness is improved. Examples of the thermoplastic resin include polypropylene resin (PP) such as isotactic, syndiotactic, and random or block copolymer with ethylene, high-density polyethylene (HDPE), and low-density polyethylene (LDP).
E), linear low density polyethylene (L-LDPE), polyethylene resin such as chlorinated polyethylene
General polyolefin resins such as ethyl acrylate copolymer (EEA), ethylene / methyl acrylate copolymer (EMA), ethylene / vinyl acetate copolymer, ethylene / α-olefin copolymer, butadiene resin, Styrene / butadiene copolymer, ionomer resin, polyamide resin, polyester resin, thermoplastic urethane resin, styrene / isoprene copolymer, and the like.

Among the thermoplastic resins having a functional group which is a preferred embodiment, the thermoplastic resins exemplified above are those obtained by modifying the above-mentioned thermoplastic resins with maleic acid, maleic anhydride, acrylic acid or the like. Is exemplified. Among them, the most preferred is maleic acid-modified polypropylene. The method of acid-modifying the thermoplastic resin exemplified above is not particularly limited, and can be performed by a conventionally known method.For example, a maleic acid-modified polypropylene resin is a single-screw extruder or a twin-screw kneader. It can be obtained by adding maleic acid, or further maleic anhydride or peroxide to polypropylene using an extruder, kneading the mixture, and performing a grafting reaction.

In order to obtain a suitable adhesiveness in the present invention,
The thermoplastic resin is preferably an acid-modified resin having a melt index of 30 g / 10 minutes or less measured at 190 ° C., a load of 2.16 kgf, an orifice diameter of 1 mm, and measurement conditions of 10 minutes. 5
/ 10 minutes is more preferable.

In the adhesive layer of the present invention, a resin blended with an epoxy-modified polyolefin-based resin or a polyester-based resin in addition to the above-mentioned thermoplastic resin can be used as long as the object of the present invention is not impaired.

The magnetic material and / or the conductive material dispersedly contained in the adhesive layer of the present invention is heated by high-frequency induction heating. The magnetic material used when utilizing high-frequency induction heating includes Ag powder, Ni powder, Cu
Powder, Fe powder, Co powder, Ti powder, metal powder such as Ag-plated Cu powder, brass fiber, Al fiber, Cu fiber, metal fiber such as stainless steel fiber, metal flakes, and the like. Examples include carbon black such as acetylene black and thermal black, graphite, and carbon fiber. Further, conductive carbon black can be used as the conductor. The conductive carbon black that can be used in the present invention is added for imparting conductivity to the composition, and is distinguished from carbon black used as a filler / reinforcing agent by DPB.
(Dibutyl phthalate) oil absorption of 90 [ml / 100
g] or more, preferably 100 [ml / 100 g] or more,
More preferably, it refers to carbon black of 150 to 400 [ml / 100 g]. The type of the conductive carbon black is not particularly limited as long as it shows a volume resistivity in a region of 10 ⁴ to 10 ¹⁰ [Ω · cm] as the final composition, and may be appropriately determined according to the conductivity. Examples of such conductive carbon black include # 3050B, # 3150B, and # 3750 manufactured by Mitsubishi Chemical Corporation.
B, # 3950B, Ketjen Black EC, DJ-600 manufactured by Japan Easy Corporation, # 4 manufactured by Tokai Carbon Co., Ltd.
500, # 5500, and acetylene black and thermal black manufactured by Denki Kagaku Kogyo KK. These magnetic materials and / or conductors may be used alone or in combination of two or more. Among these, iron, nickel, and cobalt, which are ferromagnetic and conductive, are preferable. As a method of dispersing the magnetic material and / or the conductor in the thermoplastic resin, an appropriate method can be adopted depending on the melting point of the thermoplastic resin and the like. For example, the thermoplastic resin is dissolved by a solvent. A method of mixing a solution with a magnetic material and / or a conductor,
Examples include a method of mixing a thermoplastic resin and a magnetic material and / or a conductor by a kneader such as a kneader or a Banbury mixer. The amount of dispersion of the magnetic material and / or the conductor in the thermoplastic resin can be appropriately determined according to heating conditions by high-frequency induction heating. ~ 20
[%], And more preferably 2 to 10 [%]. When the content is within the above range, the thermoplastic resin contained in the adhesive layer is sufficiently melted, and the physical properties of the adhesive itself are stabilized. Further, it is also preferable from the viewpoint of the filling property to the surface of the layer bonded through the fiber reinforcing layer and the adhesive layer. The method of heating the magnetic body and / or the conductor is based on performing high-frequency induction heating on the magnetic body and / or the conductor using a high-frequency induction heating device. The high-frequency induction heating device preferably has a frequency of 10 ² to 10 ⁵ kHz,
An output of about 1 to 200 kW is used. Magnetic material,
And / or the conductor is heated by the induction heating using the high frequency as described above, and generates heat.
And / or the thermoplastic resin around the conductor is melted, and the melted thermoplastic resin is used as an adhesive portion to bond the fiber reinforcing layer to another layer.

The adhesive of the present invention can be used not only for hoses but also for charging rollers, antistatic sheets, conductive belts, vacuum cleaners, equipment panel covers, clean room interiors, IC-related parts and IC product housings for various OA equipment. It can be used as a method for joining and bonding tanks, sensor electrodes, grounding rods, planar heating elements, building floor materials, and the like. Also,
Of course, it is also used for joining organic materials including a magnetic material and / or a conductive material to each other or to a metal.

Next, a method of manufacturing a hose according to the present invention will be described with reference to an embodiment shown in the accompanying drawings. FIG.
FIG. 1 is a schematic diagram showing an outline of a hose manufacturing process of the present invention. The hose of the present invention can be manufactured, for example, as follows. That is, as shown in FIG. 2, a thermoplastic elastomer composition for a hose tube from a hose tube material extruder 8 is placed on a mandrel 7 on which a release agent is applied in advance, and an extruder 9 for an adhesive is further placed thereon. From the above, two layers of the adhesive layer containing a thermoplastic resin having a magnetic substance and / or a conductive substance dispersed therein are simultaneously extruded to form a tube in the hose tube forming die 10, thereby forming a hose tube. 11 and an adhesive layer 12a are formed. At this time,
After extruding the thermoplastic elastomer composition for a hose tube in advance, the adhesive layer 12a may be extruded thereon. Next, the fiber reinforcing layer 14 is formed on the hose tube 11 and the adhesive layer 12a using the reinforcing layer forming machine 13,
The fiber reinforcing layer 14 is formed by aligning a plurality of reinforcing fibers and braiding them in a spiral or blade shape. Next, high frequency is applied to the hose on which the fiber reinforcement layer 14 has been formed by the high frequency induction heating device 15, and the magnetic material and / or the conductor dispersed in the adhesive layer 12a are applied to the hose.
Apply local heating for 0.1-5 seconds. When high-frequency induction heating is performed by the high-frequency induction heating device 15, the magnetic material and / or
Alternatively, the adhesive layer 12a made of a thermoplastic resin in which an electric conductor is dispersed can be heated to 100 to 350 ° C. to melt the thermoplastic resin contained in the adhesive layer, thereby enabling sufficient bonding. When the high-frequency induction heating is performed in this manner, the adhesive layer can be melted without externally heating the entire hose in an oven or the like, and the hose tube 11 and the fiber reinforcing layer 14 are physically separated via the adhesive layer 12a. In addition to being chemically bonded strongly, the deterioration of the material is small.
Further, since the melting by heating is instantaneously and uniformly performed on the entire adhesive layer, the hose tube 11 and the fiber reinforced layer 1 can be melted in a short time.
4 can be bonded, and the advantage that the working efficiency is high can be obtained. Further, even if the stitches of the reinforcing fibers of the fiber reinforcing layer 14 are not fine and form a rough surface, good adhesion to the hose tube 11 can be obtained. Lastly, similarly to the hose tube, the adhesive layer 12b from the adhesive extruder 17 is provided on the fiber reinforcing layer 14, and the thermoplastic elastomer composition for hose cover is further provided from the hose cover material extruder 18 on the fiber reinforcing layer 14. At the same time, two layers are extruded and formed into a hose shape in a hose cover forming die 16 to form a hose cover 1.
9 is formed. When forming the hose cover, first, the adhesive layer 12
After extruding b, the thermoplastic elastomer composition for a hose cover may be extruded to form the hose cover 19. The magnetic material and / or the conductive material dispersed and present in the adhesive layer 12b is subjected to high-frequency induction heating by the high-frequency induction heating device 15 on the hose on which the hose cover 19 has been formed. In FIG. 2, the induction heating of the adhesive layer 12 a is performed before the hose cover 19 is formed.
The adhesive layer 1 is provided between the hose cover 19 and the fiber reinforcing layer 14.
It is firmly bonded through 2a and 12b. After forming the hose in this manner, the desired hose can be obtained by removing the mandrel 7 from the hose.

Since the hose of the present invention has the above-described configuration, it has the following characteristics. The hose of the present invention has a magnetic material and / or a thermoplastic resin in which a conductive material is dispersed in at least one of the layers consisting of a hose tube, a fiber reinforced layer, and a hose cover. Since the interlayer bonding is performed, the adhesiveness between the layers is high. Therefore, the hose of the present invention has excellent durability. In the hose of the present invention in which the layers are bonded by high-frequency induction heating, strong bonding between the layers can be obtained without external heating. Even if the layer surface is rough, good adhesiveness can be obtained. Since there is no external heating, the outer surface of the hose is not deteriorated by heating at the time of production. In addition, according to the bonding by high-frequency induction heating, the bonding can be performed quickly, and the bonding step can be performed as one point in a continuous hose manufacturing process, and the workability is excellent.

Such a hose of the present invention can be used as a high-pressure hose that requires long-term durability in a high-temperature and high-pressure environment. Examples of the hose include oil-resistant hoses for construction machines and automobiles, power steering hoses, and the like. It can be used as a water jet hose or the like.

[0021]

The present invention will be described in more detail with reference to the following examples. (Example 1) The matrix phase is P
P, thermoplastic elastomer composition (A) containing NBR in the rubber component (Diolast 701-70, manufactured by AES)
The adhesive layer is made of maleic acid-modified polypropylene (Admer QB540, manufactured by Mitsui Petrochemical Co., Ltd.) and iron powder (P
powder (available from Sanka Chemical Co., Ltd.) at a volume fraction [%] shown in Table 1 below. A thermoplastic elastomer composition (PPDM as a matrix component and EPDM as a rubber component) is used for a hose cover. B) (Santoprene 101-7)
3, manufactured by AES). First, the thermoplastic elastomer composition (A) and the adhesive layer are extruded in two layers on a polyester mandrel to form a hose tube (9.5 mm in inner diameter), on which polyester fibers (1500 denier x two strands) are laid. The fiber reinforced layer was formed by braiding in a blade shape. Further, two layers of the adhesive layer and the thermoplastic elastomer composition (B) were extruded thereon to form a hose cover (outer diameter: 16.9 mm), which was heated by high-frequency induction heating. The heating temperature by high-frequency induction heating was 190 ° C., and the line speed was 5 m / min.

Example 2 Acetylene black (manufactured by Denki Kagaku KK) was used as a conductor dispersed and contained in the adhesive layer.
A hose was prepared in the same manner as in Example 1 except that the hose was used. Example 3 In addition to maleic acid-modified polypropylene, an acid-modified low-molecular-weight polypropylene (UMEX 1001, manufactured by Sanyo Chemical Co., Ltd.) was added to the adhesive layer in a weight ratio shown in Table 1 below.
And a hose was produced in the same manner as in Example 1 except that acetylene black (manufactured by Denki Kagaku KK) was used as a conductor dispersed and contained in the adhesive layer.

(Comparative Example 1) A hose was produced in the same manner as in Example 1 except that no magnetic material and / or conductor was added to the adhesive layer. (Comparative Example 2) A hose was produced in the same manner as in Example 1 except that the adhesive layer contained 30 vol% of iron.

The physical properties of the hoses prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were measured and evaluated as follows. (1) Durability of hose The durability test was performed in accordance with SAE J188 type 1. Oil is auto-multi oil, temperature 100 ℃,
Impact pressure was repeatedly applied under the condition of a pressure of 140 kg / cm ² . With respect to the hoses manufactured in Examples 1 to 3 and Comparative Example 1, the number of times of pressurization until an abnormality occurred in the hose was determined. (2) Adhesiveness of hose Adhesiveness was carried out in accordance with a peel test of JIS K6301. The test temperature during the peel test was 100 ° C. Table 1 shows the results.

[0025] In the table, the unit of the compound is [parts by weight]. * 1 Adhesive interface peeling * 2 Adhesive material destruction

As described above, if no magnetic material and / or conductor is contained, the adhesive and the reinforcing agent do not adhere to each other, so that the adhesive interface is broken in a durability test, and
If the amount of the magnetic material and / or the conductor is too large, the physical properties of the adhesive itself deteriorate, resulting in the destruction of the adhesive during a durability test.

[0027]

The hose according to the present invention has a magnetic material and / or a thermoplastic resin having a conductive material dispersed in an adhesive portion of the hose, and the magnetic material and / or the conductive material is subjected to high-frequency induction. By heating and heating to generate heat, melting the thermoplastic resin and bonding the fiber reinforced layer and other layers, the fiber reinforced layer and other layers are firmly bonded, and against repeated impact force due to high pressure Has excellent durability. At the time of hose production, by selecting high-frequency induction heating as a method of heating a magnetic material used as an adhesive layer and / or a thermoplastic resin having a conductor dispersed therein, a hose tube, a hose cover, and a fiber reinforced layer are selected. Bonding can be performed in a short time and can be made strong, and workability is high.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of the hose of the present invention.

FIG. 2 is a schematic view showing an example of a method for manufacturing a hose of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose 2 Hose tube 3 Reinforcement layer 4 Hose cover 5, 6 Adhesive layer 7 Mandrel 8 Extruder for hose tube material 9 Extruder for adhesive 10 Die for hose tube forming 11 Hose tube 12a Adhesive layer 12b Adhesive layer 13 Reinforcement layer formation Machine 14 Fiber reinforcement layer 15 High frequency heating device 16 Hose cover forming die 17 Extruder for adhesive 18 Extruder for hose cover material 19 Hose cover

Claims (3)

[Claims] 1. A hose comprising a hose tube, at least one fiber reinforced layer, and a hose cover, wherein when there are a plurality of fiber reinforced layers, a hose tube, a hose cover and a fiber reinforced layer, other fibers are provided. At least one selected from reinforcing layers
A hose having a thermoplastic resin-bonded portion in which a magnetic material and / or a conductor is dispersed between the fiber-reinforced layer and a magnetic material for bonding the two to each other. 2. The method according to claim 1, wherein the thermoplastic resin bonding portion has a volume fraction of 1 to 1.
The hose according to claim 1, wherein 20% of a magnetic material and / or a conductive material is dispersed. 3. The magnetic material and / or the conductor,
The hose according to claim 1 or 2, wherein the thermoplastic resin is heated and melted by heating by high-frequency induction heating to bond the fiber reinforcing layer and an adjacent layer via the thermoplastic resin bonding portion. Manufacturing method.