Double-layer composite tube and manufacturing method thereof

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

Active Publication Date: 2014-09-03
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 tube and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 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 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, a density of 0.920-0.964g / cm3, a heat distortion temperature (under the condition of 0.46MPa) of 85°C, and a melting point of 130-136°C. It is a linear structure with excellent Comprehensive performance thermoplastic engineering plastics.

[0042] The high...

Embodiment 2

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

Embodiment 3

[0061] Embodiment 3: The difference from Example 1 is that the inner layer of the double-layer composite pipe is made of 65% ultra-high molecular weight polyethylene and 35% ethylene-vinyl alcohol copolymer; the outer layer is made of It is made of 92% high-density polyethylene, 7% ethylene-vinyl alcohol copolymer and 1% PE special 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 production for water supply engineering, in particular to a double-layer composite pipe and a preparation method thereof. Background technique [0002] HDPE -100 pipe has strong toughness, durability and good fission resistance. It has been widely used in urban and rural human and livestock safe drinking water projects. However, due to the poor UV resistance of HDPE itself, it needs to be used in use Add a certain proportion of carbon black matrix (0.2g%-0.5g%) to enhance the anti-ultraviolet decomposition force, so as to prolong the service life of the pipe and improve the compression resistance. Since the carbon black element is in the form of micromolecular particles, some small cracks and surface fine particles will form on the surface when heated and cooled, and accumulate in the inner layer of the pipe, making the pipe wall not smooth. When the water fluid passes through, scale and some m...

Claims

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Application Information

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Patent Type & Authority Applications(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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