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Double-layer composite pipe and its preparation method

A double-layer composite, pipe technology, applied in the direction of hoses, pipes, mechanical equipment, etc., can solve the problems of unsmooth inner wall of pipes, secondary pollution of water quality, easy to produce scale, etc., to achieve good sealing, large flow, enhanced The effect of stress resistance

Active Publication Date: 2016-05-11
菏泽三垒塑业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the technical problems that the inner wall of the traditional HDPE pipe is not smooth and clean, easily produces scale, breeds bacteria, and causes secondary pollution of water quality due to the addition of carbon black.

Method used

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  • Double-layer composite pipe and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: A double-layer composite pipe, including an inner layer and an outer layer, the inner layer is made of UHMW-9003 ultra-high molecular weight polyethylene (UHMW-9003 refers to ultra-high molecular weight polyethylene, the model is 60% by mass). 9003) and 40% E / VAL-112A ethylene-vinyl alcohol copolymer (E / VAL-112A refers to ethylene-vinyl alcohol copolymer, model 112A), the outer layer is made of 90% by mass HDPE -2480H high density polyethylene (HDPE-2480H refers to high density polyethylene, the model is 2480H), 8% E / VAL-112A ethylene-vinyl alcohol copolymer and 2% PE special melanin particles C.

[0041] The ultra-high molecular weight polyethylene used is polyethylene with a molecular weight of more than 1 million, the density is 0.920 ~ 0.964g / cm3, the heat distortion temperature (under the condition of 0.46MPa) is 85 ° C, and the melting point is 130 ~ 136 ° C. It is a linear structure with excellent Comprehensive performance thermoplastic engineering pla...

Embodiment 2

[0060] Example 2: The difference from Example 1 is that the inner layer of the double-layer composite pipe is made of 62% by mass of ultra-high molecular weight polyethylene and 38% of low-density polyethylene.

Embodiment 3

[0061] Example 3: The difference from Example 1 is that the inner layer of the double-layer composite pipe is made of 65% by mass of ultra-high molecular weight polyethylene and 35% of ethylene-vinyl alcohol copolymer; the outer layer is made of The mass percentage is 92% of high-density polyethylene, 7% of ethylene-vinyl alcohol copolymer and 1% of PE-specific melanin particles C.

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Abstract

The invention discloses a double-layer composite tube and a manufacturing method thereof. The double-layer composite tube and the manufacturing method aim to solve the technical problems that black pigment is added into traditional HDPE tubes, accordingly inner walls are not smooth, water scale is prone to being generated, bacteria grow, and secondary pollution of water is caused. The double-layer composite tube comprises an inner layer and an outer layer, the inner layer is made of ultrahigh molecular weight polyethylene and ethylene-vinyl alcohol copolymers or low-density polyethylene, and the outer layer is made of high-density polyethylene, ethylene-vinyl alcohol copolymers and special melanin particles C of PE. The method includes the following steps of material proportioning and dehumidifying, material plastifying, material forming, vacuum sizing and spraying and cooling. The double-layer composite tube has the advantages of being good in toughness and flexibility, high in chemical stability, good in corrosion resistance, good in sealing performance, large in distribution power, long in service life, high in low temperature resistance, hygienic, free of toxin and the like. The manufacturing method is simple, easy to operate and capable of achieving integral production of the double-layer composite tube.

Description

technical field [0001] The invention relates to the technical field of HDPE pipe material production for water supply engineering, in particular to a double-layer composite pipe material and a preparation method thereof. Background technique [0002] HDPE-100 grade pipe has strong toughness, durability and good fission resistance. It has been widely used in urban and rural safe drinking water projects for people and animals. However, due to the poor UV resistance of HDPE itself, it needs to be used in use Add a certain proportion of carbon black parent material (0.2g%-0.5g%) to enhance the decomposition power of anti-ultraviolet rays, and achieve the effect of prolonging the service life of the pipe and improving the compressive ability. Since the carbon black element is in the form of micro-molecular particles, some fine cracks and surface fine particles will be formed on the surface when it is heated and cooled, which will be deposited on the inner layer of the pipe, makin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L11/06C08L23/06C08L23/08B29C47/06
CPCB29C48/18C08L23/06C08L2203/18C08L2205/025C08L2207/062C08L2207/066C08L2207/068F16L11/06C08L23/0861C08K3/04
Inventor 周振民孔庆东王学超周科
Owner 菏泽三垒塑业股份有限公司
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