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Hose reinforcing composite rope made of contraposition aromatic polyamide fibers

An aramid and fiber-reinforced technology is applied in the field of hoses reinforced with composite ropes of para-aramid fibers, and can solve the problems of inability to provide the hose with burst pressure and volume expansion.

Inactive Publication Date: 2012-07-11
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, only high-strength fibers, such as para-aramid, or steel wire, are used to form a single-layer fiber-reinforced layer of the hose. Although the obtained hose meets the requirements for burst pressure resistance, it cannot meet the volume expansion property. requirements
[0010]Therefore, the prior art has not been able to provide a hose with only a single layer of fiber reinforcement as a power steering tube, and at the same time achieve its industrial burst pressure and volume expansion requirements

Method used

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  • Hose reinforcing composite rope made of contraposition aromatic polyamide fibers
  • Hose reinforcing composite rope made of contraposition aromatic polyamide fibers
  • Hose reinforcing composite rope made of contraposition aromatic polyamide fibers

Examples

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preparation example Construction

[0062] There are no special restrictions on the preparation method of the hose of the present invention, and the processes and steps for preparing the hose known to those of ordinary skill in the art can be used, as long as it is satisfied that only a single layer of fiber formed by the composite rope of the present invention is used in the hose. Enhancement layer. For example, the hose of the present invention can be formed as follows: at least one elastic substrate tube core layer is formed by an extrusion process, and then the composite rope of the present invention is used on the tube core layer to form a single-layer fiber reinforced layer, and then passed through The extrusion process forms at least one elastic base material outer coating on the fiber reinforced layer.

[0063] The hose of the present invention can be used for a hose assembly, and the hose assembly includes the hose of the present invention, hose connectors and clamps sleeved at both ends of the hose.

[006...

Embodiment 1

[0083] Put a 600 denier Kevlar 1K1668 fiber and a strand of 500 denier polyester fiber are twisted in the same direction to 693 twists / meter, then they are combined and twisted in the opposite direction to 693 twists / meter to form a composite rope (Such as Image 6 ), the twisting coefficient of the composite rope is about 8. Then, the two twisted composite ropes are paralleled and stranded, and then the four composite ropes after the parallel stranding are wound on each spindle in parallel and braided into the hose. The single-layer fiber reinforced layer has an interlaced pattern of eight parallel composite ropes.

Embodiment 2

[0085] Two 600-denier Kevlar 1K1668 fibers were twisted in the same direction to a twist of 697 twists / meter, and a 500-denier polyester fiber was also twisted in the same direction to a twist of 697 twists / meter, and then These three strands of fibers are merged together and twisted in opposite directions to a twist of 697 twists / meter to form a composite rope (such as Figure 7 ), the twisting coefficient of the composite rope is about 10. Two twisted composite ropes are twisted, and then three parallel twisted composite ropes are wound on each spindle in parallel, and are braided into a hose. The single-layer fiber reinforced layer has an interlaced pattern of six parallel composite ropes.

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Abstract

The invention relates to a hose reinforcing a composite rope made of contraposition aromatic polyamide fibers. The hose comprises at least one pipe core layer, at least one coating layer and a single-layer fiber reinforcing layer located between the pipe core layer and the coating layer, and the fiber reinforcing layer comprises the composite rope formed by twisting at least one strand of contraposition aromatic polyamide fibers and at least one high-elongation fibers together. The hose reinforcing the composite rope made of the contraposition aromatic polyamide fibers has high blast-resisting pressure and good volume expansibility.

Description

Technical field [0001] The present invention relates to a hose reinforced with a composite rope of para-aramid fiber. The hose has high burst pressure resistance and good volume expansion, and is suitable for use as a power steering tube. Background technique [0002] In recent years, with the rapid development of the automobile industry, hoses have been widely used in a variety of automobile parts to transport pressurized liquids or gases, such as motor vehicle radiator and heater hoses, air conditioning hoses, brake hoses and power steering tube, etc. Typically these hose assemblies include a core layer, one or more reinforcement layers, and at least one outer covering layer on the reinforcement layers. The reinforcing layer is usually formed of cords of rayon or steel wire material, which are knitted, woven, braided or spirally wound around the core layer to increase the pressure resistance of the hose. The core layer and outer covering layer of the hose are usually for...

Claims

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Application Information

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IPC IPC(8): F16L11/08B32B27/02B32B27/34
CPCD02G3/447
Inventor 黎学东施骏捷
Owner EI DU PONT DE NEMOURS & CO
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