JPH11325333A - Composite hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multipurpose composite hose capable of coping with a heat-resistant temperature ranging from about +120 deg.C to -200 deg.C, and applicable to an acid and alkali. SOLUTION: In this composite hose 30, an inner spiral ring 1 with the liquid contacting face side formed into a flat face is used as a core material, inner cloth 2, a biaxially oriented polypropylene film layer 3, a biaxially oriented plastic seamless tube layer 4 and a biaxially oriented composite plastic film 5 are laminated in this order, outer cloth 10 is wound on a surface thereof, and an outer spiral ring 20 is wound on the outer cloth 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite hose, and more particularly, to a composite hose having resistance to acids and alkalis, having a strong and cryogenic property, and having excellent permeation resistance. Also, the present invention provides a composite hose in which the inner spiral surface on the liquid contact side is formed as a flat surface to reduce the pressure loss of the fluid and to remove a liquid pool portion which has conventionally occurred in the inner spiral portion. What you want to do.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional composite hose has an inner spiral ring 1 'as a core material and an inner cloth 2' as a core material.
And a continuous film of a synthetic resin is spirally wound around the inner cloth 2 'to a desired thickness to form a film layer 3', and a seamless tube 4 'having the same effect as the film is inserted into the film layer 3'. A continuous film of a synthetic resin is further spirally wound on the surface of the seamless tube to a desired thickness to form a film layer 5 ', and an outer cloth 6' is wound around the film layer. The outer spiral wheel 7 'is formed by spirally winding an outer spiral wheel 7' shifted by 1/2 the pitch of the inner spiral wheel.

[0003]

The present invention has toughness, and can be applied to both acids and alkalis. In addition, it has good gas permeation resistance, and has a substantially temperature-resistant range. An object of the present invention is to provide a composite hose that can withstand from + 120 ° C. to −200 ° C. Another object of the present invention is to provide a composite hose in which the pressure loss of the carrier fluid is reduced as compared with a conventional composite hose using an inner spiral wheel having a circular cross section.

[0004]

SUMMARY OF THE INVENTION The present invention is directed to a polyester or polypropylene or fluorine fiber cloth for cold or chemical resistance, and a biaxially oriented polypropylene for gas permeation, flex resistance and cold resistance. Film layer or fluorine-based film layer and gas permeation resistance,
A composite hose is formed by using a biaxially stretched composite plastic seamless tube and a biaxially stretched composite plastic film that are biaxially stretched on a composite plastic material that can be adapted to bending resistance and cold resistance.

[0005] Further, according to the present invention, the cross-sectional shape of the inner spiral ring is formed such that the liquid-contacting surface side is a flat surface so that no liquid pool portion is formed as compared with the conventional inner spiral ring having a circular cross-section. Further, it is an object of the present invention to provide a composite hose capable of increasing a transfer amount by reducing a pressure loss of a fluid.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a biaxially oriented polypropylene film layer or a fluorine-based film layer retains chemical resistance, bending resistance and cold resistance in a film layer of a forming portion constituting a composite, The biaxially stretched composite plastic seamless tube layer maintains gas permeation resistance, flex resistance and cold resistance, and the biaxially stretched composite plastic film layer maintains gas permeation resistance, flex resistance and cold resistance. And composite hose.

The above-mentioned composite plastic material having chemical resistance, bending resistance, gas permeation resistance and cold resistance is as follows if it is listed in a clause. (1) An aromatic polyamide layer (A) containing an amorphous polyamide resin or an aromatic polyamide resin in an aromatic polyamide resin and an aromatic polyamide layer (B) made of an aromatic polyamide resin, (A) / (B) / (A)
That are laminated in three layers in this order. It has excellent oxygen barrier properties and high mechanical strength under high humidity. (2) A low-crystalline ethylene-α-olefin copolymer layer formed on at least one surface of a polyamide film; for example, at least a polyamide film made of a resin of nylon 6, nylon 66 or a copolymer resin thereof. A laminated film comprising a low-crystalline ethylene-α-olefin copolymer or a mixed resin thereof with an olefin resin on one side. As a characteristic, it has excellent low-temperature heat sealability. (3) A laminate obtained by laminating a polyamide resin layer or a polyester resin layer, an adhesive layer, and a seal layer in this order.
As a characteristic, by irradiating a specific amount of electron beam from at least one surface, the interlayer adhesion strength and the heat sealing strength are improved. (4) A rubber adhesive layer (A) and an adhesive layer (B) made of a polyolefin resin and a gas barrier layer (C) of a polyamide resin, a polyester resin, a polyarylate resin, a polyamide alloy, or a polyester alloy, A) / (B) / (C) formed in three layers in this order. As an attribute, it is excellent in preventing air permeation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. Reference numeral 30 denotes a composite hose according to the present invention. The hose has an inner spiral wheel 1 having a flat surface 11 on the liquid contact side, and a core made of polyester for protecting a film on the surface of the core. Wrap cloth 2,
A biaxially stretched polypropylene film is wrapped around the inner cloth surface to form a ply, and a biaxially stretched polypropylene film layer or a fluorine-based film layer 3 formed by wrapping a fluorine-containing film around the ply is formed. To 2
A required number of axially stretched composite plastic seamless tubes are inserted to form a biaxially stretched composite plastic seamless tube layer 4, and a biaxially stretched composite plastic film is ply wound around the surface of the seamless tube layer to form a first ply.
A biaxially stretched composite plastic film layer 5 is formed, and a first intermediate cloth 6 made of polyester is formed on the surface of the film layer.
, And a biaxially stretched composite plastic film is wrapped around the surface of the intermediate cloth as required to form a 22nd biaxially stretched composite plastic film layer 7. The second layer made of a polyester material is formed on the surface of this film layer. An intermediate cloth 8 is formed, and a biaxially stretched composite plastic film is further wrapped around the surface of the second intermediate cloth to form a 32nd axially stretched composite plastic film layer 9. A polyester material is formed on the film layer surface. The outer helical wheel 20 is wound around the outer helical wheel 1 with a pitch shifted by 表面 from the helical pitch of the inner helical wheel 1.

As the "composite plastic" used in this embodiment, those described in the embodiments of the present invention (1) to (4) can be applied. Further, the composite hose according to the present invention has the first intermediate cloth 6 shown in the embodiment.
And one or two of the second intermediate fabric 8 and the 32nd stretched composite plastic film layer 9 and the second intermediate fabric 8 and the 32nd stretched composite plastic film layer 9 can be omitted as necessary. .

The function and function of each component described above will be described as follows. The biaxially stretched polypropylene film layer or the fluorine-based film layer 3 is excellent in chemical resistance, bending resistance and cold resistance. Both the biaxially stretched composite plastic seamless tube layer 4 and the biaxially stretched composite plastic film layer 5 are excellent in gas permeability resistance, bending resistance, cold resistance and strength. In the case where nylon is used as the composite plastic (see Embodiment (2) of the invention), the biaxially stretched composite plastic tube and the biaxially stretched composite plastic film have flexibility even at low temperatures, and are resistant to liquids and gases. It is very excellent in permeation resistance. For example, the oxygen permeability is 23 ° C. × 65 compared to a biaxially oriented polypropylene film.
% RH (MOCON method), the tube has a transmittance of 1/25, and the film has a transmittance of 1/12, which is very excellent. (See “Note: Oxygen permeability”)

[Note: Oxygen permeability] (Test method: MOCON method) 23 ° C. × 65% RH C / m ² / 24H / atm Biaxially stretched composite polyamide tube 45 μ 40 Biaxially stretched composite polyamide film 40 μ 80 Biaxially stretched Polypropylene film 40μ 1000

The inner cloth can be appropriately changed depending on the use. For example, a polyester cloth is used for a liquefied gas at a very low temperature such as LPG or LNG, and a cloth for a chemical such as an acid alkali or a solvent is used. By using a cloth made of polypropylene or fluorine fiber, extremely low temperature (-200
C) to a high temperature (120 C). The shape of the inner spiral ring can be arbitrarily designed.

[0013]

According to the present invention, the inner cloth which is in contact with the liquid-contacting surface is adapted to cryogenic resistance and chemical resistance, and the biaxially stretched polypropylene film layer or the fluorine-based film layer formed on this surface is resistant to chemicals. , Bending resistance and cold resistance, and furthermore, the biaxially stretched composite plastic seamless tube layer and the biaxially stretched composite plastic film layer formed on the film layer have gas permeation resistance,
The present invention can provide a versatile composite hose adapted to flex resistance and cold resistance and adapted to a temperature range from -200 ° C. at an extremely low temperature to 120 ° C. at a high temperature.

The present invention also provides a hose having a substantially triangular cross-section, in which the inner spiral ring has a flat surface on the liquid contact side, and in particular, has a substantially triangular cross section with the wetted surface side as the bottom surface. The outer spiral ring and the inner spiral ring are sufficiently etched into the thick part, and the entire liquid contact surface of the hose is flattened. As a result, the liquid pool which has conventionally occurred can be eliminated and the pressure loss of the fluid can be reduced. Since it can be reduced, the transport amount of the fluid can be increased, and furthermore, the constriction phenomenon caused by riding between the outer spiral wheel and the inner spiral wheel does not occur.

[Brief description of the drawings]

FIG. 1 is a composite hose according to the present invention.

FIG. 2 is an explanatory diagram of a conventional example.

[Explanation of symbols]

Reference Signs List 1 inner spiral wheel 11 flat surface of inner spiral wheel 12 hose surface on liquid contact side 2 inner cloth 3 biaxially stretched polypropylene film layer or fluorine-based film layer 4 biaxially stretched composite plastic seamless tube layer 5 twelfth axially stretched Composite plastic film layer 6 First intermediate fabric 7 22nd axially stretched composite plastic film layer 8 Second intermediate fabric 9 32nd axially stretched composite plastic film layer 10 Outer fabric 20 Outer spiral wheel 30 Composite hose

Claims (3)

[Claims] An inner spiral ring is used as a core material, an inner cloth made of a plastic material is wound around the surface of the core material, and a biaxially stretched polypropylene film is wrapped around the inner cloth surface with a required ply to form a biaxial. A biaxially stretched fluorine-based film layer is formed by winding a stretched polypropylene film layer or a fluorine-based film and a required ply, and a composite plastic material capable of adapting to the surface of this film layer for gas permeability, bending resistance and cold resistance A biaxially stretched composite plastic seamless tube layer and a biaxially stretched composite plastic film layer obtained by performing biaxial stretching on the film are laminated, and an outer cloth made of a plastic material is wound around the film layer. A composite hose comprising an outer spiral wound around a cloth surface. 2. An inner spiral ring is used as a core material, an inner cloth made of a plastic material is wound on the surface of the core material, and a biaxially stretched polypropylene film is wrapped around a required ply on the inner cloth surface to form a biaxial. A biaxially stretched fluorine-based film layer is formed by winding a stretched polypropylene film layer or a fluorine-based film in the required ply, and the surface of this film layer is formed into a composite plastic material that can be adapted to gas permeability, bending resistance, and cold resistance. A biaxially stretched composite plastic seamless tube layer and a biaxially stretched composite plastic film layer obtained by subjecting the biaxially stretched composite film to a biaxially stretched composite plastic film layer are laminated. 2. The composite hoe according to claim 1, wherein one or two or more biaxially stretched composite plastic film layers are formed. Su. 3. The composite hose according to claim 1, wherein the liquid contact side of the inner spiral ring is formed as a flat surface.