Preparation method of elastic rubber tube with heat insulating and expanding layer

A technology of thermal insulation expansion and elastic glue, applied in household appliances, tubular items, other household appliances, etc., can solve the problems of poor heat resistance and flame retardancy, easy aging, poor elasticity of PVC hoses, etc., to improve the heat dissipation area. Effect

Inactive Publication Date: 2019-06-07
常州通和建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main technical problem to be solved by the present invention is that at present, rubber hoses are generally poor in heat resistance and flame retardancy, and fire-resistant casings are usually added, but the thickness of the casing is constant and cannot be expanded, the heat insulation effect is limited, and the PVC rubber hose has poor elasticity and is easy to age. Defects, a preparation method for an elastic hose with a heat-insulating expansion layer is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Acidic volcanic glass rock is: pitch rock

[0031] Preparation of modified aluminum silicate fiber:

[0032] In parts by weight, 20 parts of ethylene content is 50% EPDM raw rubber, 10 parts of epoxy soybean oil, 15 parts of natural zeolite powder, 5 parts of zinc oxide, 7 parts of aluminum stearate, 70 parts of polyvinyl chloride rubber , mixed to obtain the mixed raw materials, sent into the composite mold, and formed into a composite strip by hot pressing at a temperature of 70°C and a pressure of 1.4MPa, and sent to a plastic spiral tube composite winding molding machine for molding. After cooling, the high-energy electronic Beam irradiation cross-linking, the dose is 20kGy, to obtain the inner rubber tube layer, and set aside;

[0033] In parts by weight, add 70 parts of kaolin, 20 parts of alumina, 10 parts of titanium dioxide, and 20 parts of aluminum phosphate to 400 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid soluti...

example 2

[0042] Acidic volcanic glass rocks are: perlite

[0043] Preparation of modified aluminum silicate fiber:

[0044] In parts by weight, 25 parts of ethylene content is 52% EPDM raw rubber, 12 parts of epoxy soybean oil, 17 parts of natural zeolite powder, 7 parts of zinc oxide, 7 parts of aluminum stearate, 75 parts of polyvinyl chloride rubber , mixed to obtain the mixed raw materials, sent into the composite mold, and formed into a composite strip by hot pressing at a temperature of 75°C and a pressure of 1.5MPa, and sent to a plastic spiral tube composite winding molding machine for molding. After cooling, the high-energy electronic Beam irradiation cross-linking, the dose is 22kGy, to obtain the inner rubber tube layer, and set aside;

[0045] In parts by weight, add 75 parts of kaolin, 25 parts of alumina, 12 parts of titanium dioxide, and 21 parts of aluminum phosphate to 450 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solutio...

example 3

[0054] Acidic volcanic glass rocks are: pumice

[0055] Preparation of modified aluminum silicate fiber:

[0056] In parts by weight, 30 parts of ethylene content is 55% EPDM raw rubber, 15 parts of epoxy soybean oil, 20 parts of natural zeolite powder, 10 parts of zinc oxide, 8 parts of aluminum stearate, 80 parts of polyvinyl chloride rubber , mixed to obtain the mixed raw materials, sent into the composite mold, and formed into a composite strip by hot pressing at a temperature of 80°C and a pressure of 1.6MPa, and sent to a plastic spiral tube composite winding molding machine for molding. After cooling, the high-energy electronic Beam irradiation cross-linking, the dose is 25kGy, to obtain the inner rubber tube layer, and set aside;

[0057] In parts by weight, add 80 parts of kaolin, 30 parts of alumina, 15 parts of titanium dioxide, and 22 parts of aluminum phosphate to 500 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solutio...

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Abstract

The invention discloses a preparation method of an elastic rubber tube with a heat insulating and expanding layer, and belongs to the technical field of rubber tubes. According to the preparation method disclosed by the invention, the heat conduction coefficient of expandable graphite is relatively large, so that in the heat transfer process, the surfaces of fireproof materials are quickly heated,the expanded graphite can be slightly expanded, and is converted from a crimping condition to an expanding condition, and the heat dissipation area of the of a heat insulating and fireproof layer isenlarged; PVC rubber is used as a main raw material, so that a modified aluminum silicate fiber layer for coating an inner rubber tube layer is obtained, damages generated when the inner rubber tube layer is bent are reduced; the main raw material of the PVC inner rubber tube layer is polyvinyl chloride; the polyvinyl chloride is subjected to mechanical modifying with EPDM virgin rubber; epoxy soybean oil used as an additive has favorable heat resistance and favorable flexibility at low temperature, so that the epoxy soybean oil is especially suitable for being used as a plastifier in the PVCinner rubber tube layer, active chlorine atoms on chains of the polyvinyl chloride can be stable, the hydrogen chloride generated by optothermal degrading can be quickly absorbed, and continuous degrading of the polyvinyl chloride is blocked; and therefore, the ageing resistance of the PVC inner rubber tube layer is improved.

Description

technical field [0001] The invention discloses a preparation method of an elastic rubber hose with a thermal insulation expansion layer, which belongs to the technical field of rubber hoses. Background technique [0002] Hose is a type of tubular rubber product used to transport gas, liquid, slurry or granular materials. The hose structure is usually divided into: inner rubber layer, outer rubber layer and skeleton layer (or middle layer). The inner rubber layer directly bears the abrasion and erosion of the conveying medium; the outer rubber layer protects the inner body of the rubber hose from damage and erosion of the external environment; the skeleton layer is the pressure-bearing layer of the rubber hose, giving the hose body strength and rigidity. The working pressure of the hose depends on the material and structure of the skeleton layer. The material of the skeleton layer can be cotton fiber, various synthetic fibers, carbon fiber or asbestos, steel wire and the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C43/02B29C43/18B29C43/20C08L27/06C08L23/16C08K7/26C08K3/22C08K5/098D01F9/08B29L23/00
Inventor 龙国华
Owner 常州通和建筑工程有限公司
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