# US 10,502,344 B2 · Hose

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- Number: US 10,502,344 B2
- Document ID: US10502344B2
- Status: Granted
- Kind: B2
- Application number: 15/737,792
- Filed: 2016-06-23
- Published: 2019-01-03
- Granted: 2019-12-10
- Earliest claimed: 2015-06-26
- Assignees: Bridgestone Corporation
- Applicants: Bridgestone Corporation
- Inventors: Koji Suzuki; Teppei Shibata; Youhei Tsunenishi; Taichi Kobayashi
- Web page: https://patentgrep.com/patent/US10502344B2

## CPC

- F16L 11/085: {comprising one or more braided layers (in combination with layers of a helically wound core or wire F16L11/088)}
- B32B 1/08: Tubular products
- B32B 5/024: {Woven fabric}
- B32B 15/02: {Layer formed of wires, e.g. mesh}
- B32B 25/10: next to a fibrous or filamentary layer
- B32B 25/14: comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)}
- B32B 25/16: comprising polydienes {homopolymers} or poly-halodienes {homopolymers (B32B25/12 takes precedence)}
- F16L 11/08: with reinforcements embedded in the wall (F16L11/11 takes precedence)
- B32B 2262/0261: Polyamide fibres
- B32B 2262/0284: Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
- B32B 2307/714: Inert, i.e. inert to chemical degradation, corrosion
- B32B 2307/7145: Rot proof, resistant to bacteria, mildew, mould, fungi
- B32B 2307/732: Dimensional properties
- B32B 2597/00: Tubular articles, e.g. hoses, pipes
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

A hose includes an inner tube rubber layer, a woven material underlayer having a woven base material made of polyamide (PA) or polyethylene terephthalate (PET), and a reinforcing material layer, which are sequentially laminated on the inner rube rubber layer in this order. Following relationship formula (1) is to be satisfied, A·t+B·C<D (1) wherein “A” represents SO42− concentration in the inner tube rubber layer (unit: mol/mm3), “t” represents thickness of the inner tube rubber layer (unit: mm), “B” represents SO42− concentration per 1 g of the woven base material (unit: mol/g), “C” represents mass of the woven base material per unit area of the woven material underlayer (unit: g/mm2), and “D” represents a constant of 2.5×10−9 (unit: mol/mm2). 100 pbm of a rubber component contains at least 60 pbm of acrylonitrile butadiene rubber (NBR) and t≥0.5 mm.

## Claims

### Claim 1

A hose having:
an inner tube rubber layer;
a substantially cylindrical woven material underlayer having a woven base material and provided on the outer peripheral side of the inner tube rubber layer; and
a reinforcing material layer having a reinforcing material and provided on the outer peripheral side of the woven material underlayer,
wherein the inner tube rubber layer is made of a rubber composition for a hose inner tube,
the woven base material is formed by organic fibers made of polyamide (PA) or polyethylene terephthalate (PET),
the rubber composition for a hose inner tube includes a rubber component and a vulcanization accelerator,
100 parts by mass of the rubber component contains at least 60 parts by mass of acrylonitrile butadiene rubber (NBR) therein,
the inner tube rubber layer has thickness equal to or larger than 0.5 mm, and
following relationship formula (1) is satisfied,
A·t+B·C<D (1)
wherein, in relationship formula (1), “A” represents concentration of sulfate ion in the inner tube rubber layer (unit: mol/mm3), “t” represents thickness of the inner tube rubber layer (unit: mm), “B” represents concentration of sulfate ion per 1 g of the woven base material (unit: mol/g), “C” represents mass of the woven base material per unit area of a cylindrical side portion of the woven material underlayer (unit: g/mm2), and “D” represents a constant of 2.5×10−9 (unit: mol/mm2).

### Claim 2 (depends on 1)

The hose of claim 1, wherein content of a thiuram-based compound contained in the inner tube rubber layer is 3.1×10−5 mol or less per 1 g of the rubber component.

### Claim 3 (depends on 1)

The hose of claim 1, wherein the vulcanization accelerator includes at least one selected from the group consisting of a thiazole-based compound, a sulfenamide-based compound, and a guanidine-based compound.

### Claim 4 (depends on 1)

The hose of claim 1, wherein at least one intermediate rubber layer and at least one reinforcing material layer are alternately provided on the outer peripheral side of the woven material underlayer, and
an external cover rubber layer is provided on the outer peripheral side of the outermost reinforcing material layer.

### Claim 5 (depends on 1)

The hose of claim 1, wherein 100 parts by mass of the rubber component contains at least 70 parts by mass of acrylonitrile butadiene rubber (NBR) therein.

### Claim 6 (depends on 1)

The hose of claim 1, wherein the woven base material is formed by organic fibers made of polyamide (PA).

### Claim 7 (depends on 2)

The hose of claim 2, wherein the vulcanization accelerator includes at least one selected from the group consisting of a thiazole-based compound, a sulfonamide-based compound, and a guanidine-based compound.

### Claim 8 (depends on 2)

The hose of claim 2, wherein at least one intermediate rubber layer and at least one reinforcing material layer are alternately provided on the outer peripheral side of the woven material underlayer, and
an external cover rubber layer is provided on the outer peripheral side of the outermost reinforcing material layer.

### Claim 9 (depends on 3)

The hose of claim 3, wherein at least one intermediate rubber layer and at least one reinforcing material layer are alternately provided on the outer peripheral side of the woven material underlayer, and
an external cover rubber layer is provided on the outer peripheral side of the outermost reinforcing material layer.

### Claim 10 (depends on 2)

The hose of claim 2, wherein 100 parts by mass of the rubber component contains at least 70 parts by mass of acrylonitrile butadiene rubber (NBR) therein.

### Claim 11 (depends on 3)

The hose of claim 3, wherein 100 parts by mass of the rubber component contains at least 70 parts by mass of acrylonitrile butadiene rubber (NBR) therein.

### Claim 12 (depends on 4)

The hose of claim 4, wherein 100 parts by mass of the rubber component contains at least 70 parts by mass of acrylonitrile butadiene rubber (NBR) therein.

### Claim 13 (depends on 2)

The hose of claim 2, wherein the woven base material is formed by organic fibers made of polyamide (PA).

### Claim 14 (depends on 3)

The hose of claim 3, wherein the woven base material is formed by organic fibers made of polyamide (PA).

### Claim 15 (depends on 4)

The hose of claim 4, wherein the woven base material is formed by organic fibers made of polyamide (PA).

### Claim 16 (depends on 5)

The hose of claim 5, wherein the woven base material is formed by organic fibers made of polyamide (PA).

### Claim 17 (depends on 1)

The hose of claim 1, wherein 100 parts by mass of the rubber component contains at least 80 parts by mass of acrylonitrile butadiene rubber (NBR) therein.

### Claim 18 (depends on 1)

The hose of claim 1, wherein A·t+B·C<1.7×10−9 (unit: mol/mm2).

### Claim 19 (depends on 1)

The hose of claim 1, wherein A·t+B·C<6.1×10−10 (unit: mol/mm2).

### Claim 20 (depends on 1)

The hose of claim 1, wherein content of acrylonitrile in acrylonitrile butadiene rubber (NBR) is in the range of 20-41 mass %.