Silane crosslinked polyethylene pipe connecting piece

A technology of pipeline connectors and silane cross-linking, which is applied in the direction of pipeline connection layout, pipe/pipe joint/pipe fittings, mechanical equipment, etc. problem, to achieve the effect of improving low temperature cracking

Inactive Publication Date: 2002-04-17
DONGTAI NEW MATERIAL SCI ANG TECH SICHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, silane cross-linked polyethylene pipes cannot be welded as easily as polyethylene pipes or the compressive strength after welding is not equal to that of pipes, nor can they be bonded as easily as polyvinyl chloride pipes, so although it is a very good performance Good pipe, but the practical use of this pipe is greatly limited due to the difficulty of applying permanent connection methods on it

Method used

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  • Silane crosslinked polyethylene pipe connecting piece
  • Silane crosslinked polyethylene pipe connecting piece
  • Silane crosslinked polyethylene pipe connecting piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fig. 1 is a schematic structural diagram of Embodiment 1 of the present invention. A two-way silane cross-linked polyethylene pipe body 1 is formed by extrusion molding (or injection molding) and cross-linking polycondensation reaction of a material composed of a silicone monomer grafting initiator, a hydrolysis polycondensation catalyst and polyethylene. Hot-melt adhesive layers 4, 5 are respectively distributed on the inner walls of the socket openings 2, 3 at both ends of the pipe body 1. In Example 1, the pipe connector is connected to the pipe through the sockets at both ends in a hot-melt manner.

Embodiment 2

[0028] FIG. 2 shows a schematic structural diagram of Embodiment 2 of the present invention. Embodiment 2 is basically the same as Embodiment 1. The difference is that the silane cross-linked polyethylene pipe body 6 only has a socket 7 at one end, and a hot-melt adhesive layer 8 is distributed on its inner wall. The other end of the pipe body 6 has a flange 9 with a connecting through hole 30 . In Example 2, the pipe connector is connected to the pipe through the socket at one end and the flange by means of heat fusion and connector connection.

Embodiment 3

[0030] image 3 A schematic structural diagram of Embodiment 3 of the present invention is given. Embodiment 3 is basically the same as Embodiment 1. The difference is that the silane crosslinked polyethylene pipe body 10 is in the form of a 90° elbow.

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Abstract

The silane crosslinked polyethylene pipe union includes a silane crosslinked polyethylene pipe body produced by using the material comprising at least organosilicon monomer as grafting initiator, hydrolytic polycondensation catalyst and polyethylene as well as through extrusion or injection and reaction of crosslinking polycondensation and with spigots added. It is used to consitute permanent connection with silane crosslinked polyethylene pipe.

Description

Technical field: [0001] The invention relates to a pipe connector, in particular to a silane cross-linked polyethylene pipe connector which can be connected with a silane cross-linked polyethylene composite pipe by hot melting or bonding. Background technique: [0002] Compared with polyethylene pipes, silane crosslinked polyethylene pipes, due to the chemical crosslinking of polyethylene by silane, its linear structure is transformed into a three-cone network structure, which significantly improves the performance of polyethylene, its heat resistance and thermal strength. , heat aging resistance, environmental stress cracking resistance, electrical insulation, barrier properties, gasoline and aromatics resistance, creep resistance, and low temperature cracking properties have been greatly improved, which greatly broadens the application field of the original polyethylene. However, silane cross-linked polyethylene pipes cannot be welded as easily as polyethylene pipes or the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/00F16L47/02F16L47/06F16L47/14F16L47/16
Inventor 甘国工
Owner DONGTAI NEW MATERIAL SCI ANG TECH SICHUAN
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