A pe‑rt pipe material

A PE-RT and modification technology, applied in the field of plastic pipes, can solve the problems of inflection points in the hydrostatic curve, unsuitable pipes, insufficient tensile strength, etc. Excellent thermal performance

Active Publication Date: 2017-05-31
HENAN LIANSU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with cross-linked materials, PE-RT materials not only have better hot-melt welding performance, but also have the advantage of being recyclable; but compared with polypropylene materials, PE-RT materials are stretchable under certain temperature conditions Insufficient tensile strength, generally can only be used in low-temperature, low-pressure hot water systems, such as low-temperature floor radiant heating, etc.
For radiator heating systems with high internal pressure, PE-RT material pipes should not be used
In addition, PE-RT pipes are prone to brittle failure when used for a long time under various temperature conditions below 110 °C, that is, the inflection point of the hydrostatic curve

Method used

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  • A pe‑rt pipe material
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of PE-RT pipe material, described PE-RT pipe material is made up of following raw material by weight part: heat-resistant polyethylene PE-RT 90 parts, CHA-3 nucleating agent (aryl carboxylic acid metal soap) 0.2 part , 3 parts of styrene-acrylate emulsion, 8 parts of wood fiber, 0.2 part of vinyl tris (β-methoxyethoxy) silane.

[0026] The above PE-RT pipe material is prepared according to the following preparation method: PE-RT pipe material:

[0027] (1) wood fiber is dehumidified and dried, and wood fiber is modified by styrene-acrylate emulsion;

[0028] (2) Put the modified wood fiber and vinyl tris(β-methoxyethoxy)silane into a high-speed thermomixer, mix and stir for 5min, then put it into a cold mixer and cool to normal temperature to obtain a modified Material A;

[0029] (3) Put heat-resistant polyethylene PE-RT and aryl carboxylate polyolefin nucleating agent into a high-speed mixer, heat up to 80°C, mix and stir for 5 minutes, then put into a cold m...

Embodiment 2

[0032] A PE-RT pipe material, said PE-RT pipe material is composed of the following raw materials in parts by weight: 95 parts of heat-resistant polyethylene PE-RT, 0.5 parts of hydroxyaluminum p-tert-butylbenzoate (A1-PTB-BA) 8 parts, 8 parts of styrene-acrylate emulsion, 15 parts of wood fiber, 0.5 parts of vinyl tris (β-methoxyethoxy) silane.

[0033] The method for preparing the PE-RT pipe from the PE-RT pipe material of this embodiment is the same as that in Embodiment 1.

Embodiment 3

[0035] A PE-RT pipe material, the PE-RT pipe material is composed of the following raw materials in parts by weight: 92 parts of heat-resistant polyethylene PE-RT, 0.3 parts of Ca-G nucleating agent, 5 parts of styrene-acrylate emulsion 10 parts, 10 parts of wood fiber, 0.3 parts of vinyl tris (β-methoxyethoxy) silane.

[0036] The method for preparing the PE-RT pipe from the PE-RT pipe material of this embodiment is the same as that in Embodiment 1.

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Abstract

The invention relates to a PE-RT pipe material, which is composed of the following raw materials in parts by weight: 90-95 parts of polyethylene of raised temperature resistance (PE-RT), 0.2-0.5 part of an aromatic carboxylic acid salt polyolefin nucleating agent, 3-8 parts of styrene-acrylic ester emulsion, 8-15 parts of wood fiber and 0.2-0.5 part of vinyltri (beta-methoxyethoxy)silane, wherein the wood fiber is modified by the styrene-acrylic ester emulsion. The invention further relates to a PE-RT pipe prepared from the PE-RT pipe material and a preparation method of the PE-RT pipe. The PE-RT pipe prepared from the PE-RT pipe material has excellent long-term hydrostatic strength, is not in brittle failure under the temperature conditions that the temperature is lower than 110 DEG C, and can bear higher internal pressure, and the inflection point of a hydrostatic curve does not occur.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PE-RT pipe material. Background technique [0002] In recent years, heat-resistant polyethylene (PE-RT) has been widely used in building heating and hot water supply projects because of its heat resistance and toughness, as well as its characteristics of welding and hot melting. PE-RT is a copolymer of ethylene and octene, which belongs to low-density polyethylene. This material improves the heat resistance of the product while retaining the good flexibility of PE, and is a non-crosslinked product. Compared with cross-linked materials, PE-RT materials not only have better hot-melt welding performance, but also have the advantage of being recyclable; but compared with polypropylene materials, PE-RT materials are stretchable under certain temperature conditions Insufficient tensile strength, generally only used in low-temperature, low-pressure hot water systems, such as lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L97/02C08K5/098C08K5/5425
CPCC08L23/06C08L2201/08C08L2203/18C08L2205/03C08L2205/16C08L2205/24C08L25/14C08L97/02C08K5/098C08K5/5425C08K5/0083
Inventor 代营伟李锦松张海涛牛继东马家峰任朝功
Owner HENAN LIANSU IND
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