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Anti-freezing double-layer composite pipe

A double-layer composite and outer layer technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc., can solve the problems of low temperature brittleness and easy cracking, and achieve increased pressure resistance, good toughness and impact resistance, Solve the effect that is easy to freeze and crack

Active Publication Date: 2017-05-31
浙江中财管道科技股份有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current ordinary PPR hot and cold water pipes have serious low-temperature brittleness at around 0°C, and are easy to break when the temperature is below zero. Therefore, plastic pipes must be able to ensure proper strength and toughness in severe cold environments

Method used

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  • Anti-freezing double-layer composite pipe

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Embodiment Construction

[0016] The present invention proposes a frost-resistant double-layer composite pipe, which consists of a dense inner layer and an outer layer. The thickness ratio of the dense inner layer is 15-85%, and the thickness ratio of the outer layer is 85-15%. The dense inner layer matrix is ​​high-density polyethylene, and the outer layer matrix includes the following components and the mass ratio of each component is: 100 parts of random copolymerized polypropylene, 2 to 8 parts of nucleating agent, and 1 to 5 parts of compatibilizer . The preparation method of the antifreeze double-layer composite pipe is as follows: pour random copolymerized polypropylene, high-density polyethylene, nucleating agent and compatibilizer into the mixer according to the formula ratio, mix evenly, and use a twin-screw granulator to make In the co-extruder, the host high-density polyethylene is extruded through a single-screw extruder to form a dense inner layer, and then the granulated material is extr...

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Abstract

The invention discloses an anti-freezing double-layer composite pipe. The anti-freezing double-layer composite pipe comprises two parts of a compact inner layer and an outer layer; the thickness ratio of the compact inner layer is 15-85%; the thickness ratio of the outer layer is 85-15%; a basal body of the compact inner layer is high-density polyethylene; and a basal body of the outer layer comprises the following components in parts by mass: 100 parts of polypropylene random copolymer, 2-8 parts of nucleating agent, and 1-5 parts of compatilizer. The anti-freezing double-layer composite pipe overcomes the defect that a general PPR cold / hot water pipe is basically frozen under the environment of -20 DEG C, improves the pressure resistance under cold environment, is liable to install, and is excellent in toughness and impact resistance.

Description

[0001] 【Technical field】 [0002] The invention relates to the field of plastic pipes, in particular to a frost-resistant double-layer composite pipe. [0003] 【Background technique】 [0004] The current ordinary PPR cold and hot water pipes have serious low-temperature brittleness at around 0°C, and are easy to break when the temperature is below zero. Therefore, plastic pipes must be able to ensure proper strength and toughness in severe cold environments. The antifreeze plastic pipes used in home decoration are required to be easy to install, safe, environmentally friendly, non-polluting, and beautiful in appearance. Now a kind of antifreeze double-layer composite pipe is proposed. [0005] 【Content of invention】 [0006] The purpose of the present invention is to solve the problems in the prior art, and propose a kind of antifreeze double-layer composite pipe, which overcomes the defect that the ordinary PPR cold and hot water pipes are basically cracked by freezing in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/133C08K5/1539C08K5/3412C08L23/14
CPCC08K5/1539C08K5/3412C08L2203/18F16L9/133C08L23/14
Inventor 王百提龙攀周想
Owner 浙江中财管道科技股份有限公司
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