Composite pipe made of non-cross-linking refractory polyethylene and cross-linking polyethylene

A technology of high temperature-resistant polyethylene and cross-linked polyethylene is applied in the field of composite pipes, which can solve the problems of high price and difficulty in pipe promotion and application, and achieve the effects of good hot melt, high creep resistance and environmental protection.

Inactive Publication Date: 2003-02-12
DONGTAI NEW MATERIAL SCI ANG TECH SICHUAN
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of this material is relatively expensive, which is 2 to 3 times that of ordinary thermoplastic materials and 1.5 to 2 times that of cross-linked polyethylene, which has caused difficulties in the wider application of pipes made of this material.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite pipe made of non-cross-linking refractory polyethylene and cross-linking polyethylene
  • Composite pipe made of non-cross-linking refractory polyethylene and cross-linking polyethylene
  • Composite pipe made of non-cross-linking refractory polyethylene and cross-linking polyethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 A schematic structural diagram of Embodiment 1 of the present invention is given. see figure 1 The outer periphery of the cross-linked polyethylene inner layer 1 has a non-cross-linked high-temperature-resistant polyethylene outer layer 2 compounded therewith.

Embodiment 2

[0027] figure 1 A schematic structural diagram of Embodiment 2 of the present invention is given. Referring to Fig. 2, there is a metal skeleton reinforcing layer 5 welded by steel plates with holes between the cross-linked polyethylene inner layer 3 and the non-cross-linked polyethylene outer layer 4. The inner layer and the outer layer cover and compound the metal skeleton reinforcing body through the holes in the metal skeleton reinforcing layer. There are end faces 6 formed by bonding resin plugging at both ends of the composite.

Embodiment 3

[0029] image 3 A schematic structural diagram of Embodiment 3 of the present invention is given. Embodiment 3 is basically the same as Embodiment 2. The difference is that there are adhesive layers 7 and 8 between the metal skeleton reinforcement and the inner and outer layers respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A composite pipe is composed of a an internal layer made of crosslinked polyethyene and an external layer made of non-crosslinked refractory polyethene which is combined with the internal layer. Its advantages are low cost, high resistance to high temp. thermal ageing, gasoline and arylhydrocarbon, high thermal strength and anti-creeping performance, and long service life.

Description

Technical field: [0001] The invention relates to a plastic composite pipe, in particular to a composite pipe composed of non-crosslinked high-temperature-resistant polyethylene (PE-RT) and crosslinked polyethylene (PEX). Background technique: [0002] Comparing cross-linked polyethylene with non-cross-linked polyethylene, especially when it is made into pipes, the cross-linked polyethylene changes from linear to three-dimensional network structure, which significantly improves its performance, making cross-linked polyethylene pipes very Excellent performance, its heat resistance and thermal strength, heat aging resistance, environmental stress cracking resistance, electrical insulation, barrier resistance, gasoline and aromatics resistance, creep resistance, etc. have been greatly improved. Therefore, people use cross-linked polyethylene as a material to produce pipes for various purposes. [0003] However, after polyethylene is cross-linked, it can no longer be welded and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/12
Inventor 甘国工
Owner DONGTAI NEW MATERIAL SCI ANG TECH SICHUAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap