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A kind of PE pipe fitting and its production process

A pipe fitting and outer layer technology, applied in the field of PE pipe fittings and its production process, can solve problems such as short service life, and achieve the effects of improving tear strength, improving quality, and reducing the total size of stress

Active Publication Date: 2021-03-30
湖北凯科塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a PE pipe fitting and its production process, aiming to solve the problem of short service life

Method used

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  • A kind of PE pipe fitting and its production process
  • A kind of PE pipe fitting and its production process
  • A kind of PE pipe fitting and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A PE pipe fitting, comprising an outer layer and an inner layer, and the thickness ratio of the inner layer to the outer layer is 1:4, wherein the outer layer includes by parts by mass:

[0028]

[0029] The inner layer includes in parts by mass (wherein the outer layer and the inner layer are taken separately, that is, there is no corresponding relationship between the "parts" of the two, but there are "parts" in the inner layer and the outer layer. Corresponding relationship):

[0030]

[0031] The high-density polyethylene resin in the outer layer has a density of 0.955 g / cm 3 , HDPE resin with a melt index of 0.5g / 10min. The density of the high-density polyethylene resin in the inner layer is 0.935g / cm 3 , HDPE resin with a melt index of 10g / 10min.

[0032] 2 parts and 0.5 parts of nucleating agent are respectively added into the outer layer and the inner layer (the "parts" in the outer layer and the "parts" in the inner layer correspond to the "parts" in t...

Embodiment 2

[0040] A PE pipe fitting, comprising an outer layer and an inner layer, and the thickness ratio of the inner layer to the outer layer is 1:5, wherein the outer layer includes by parts by mass:

[0041]

[0042] Described inner layer comprises by mass parts:

[0043]

[0044] The high-density polyethylene resin in the outer layer has a density of 0.975 g / cm 3 , HDPE resin with a melt index of 3g / 10min. The density of the high-density polyethylene resin in the inner layer is 0.950g / cm 3 , HDPE resin with a melt index of 20g / 10min.

[0045] 5 parts and 1 part of nucleating agent are respectively added into the outer layer and the inner layer. The nucleating agent in the outer layer is calcium carbonate, and the nucleating agent in the inner layer is alum.

[0046] The ethylene-propylene rubber is EPDM.

[0047] The present invention also provides a process for producing PE pipe fittings as described in any one of the above, comprising the following steps:

[0048] S1,...

Embodiment 3

[0053] A PE pipe fitting, comprising an outer layer and an inner layer, and the thickness ratio of the inner layer to the outer layer is 1:4.5, wherein the outer layer includes by parts by mass:

[0054]

[0055] Described inner layer comprises by mass parts:

[0056]

[0057]

[0058] The high-density polyethylene resin in the outer layer has a density of 0.960 g / cm 3, HDPE resin with a melt index of 6g / 10min. The density of the high-density polyethylene resin in the inner layer is 0.940g / cm 3 , HDPE resin with a melt index of 15g / 10min.

[0059] 4 parts and 1 part of nucleating agent are respectively added into the outer layer and the inner layer. The nucleating agent in the outer layer is silicon dioxide, and the nucleating agent in the inner layer is calcium oxide.

[0060] The ethylene-propylene rubber is EPDM.

[0061] In terms of parts by mass, the outer layer also includes 3 parts of zinc oxide.

[0062] The present invention also provides a process for ...

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Abstract

The invention relates to the technical field of PE pipe fittings, and discloses a PE pipe fitting. The PE pipe fitting comprises an outer layer and an inner layer, wherein the thickness ratio of the inner layer to the outer layer is 1: (4 to 5); the outer layer comprises the following components in parts by mass: 80-100 parts of high-density polyethylene resin, 5-8 parts of polyvinyl acetal, 10-15parts of ethylene propylene rubber, 3-5 parts of cross-linking agent, 2-8 parts of antistatic agent, and 4-8 parts of antioxidant agent; and the inner layer comprises the following components in parts by mass: 15-25 parts of high-density polyethylene resin, 2-5 parts of phthalic acid ester, 2-4 parts of fatty acid zinc salt, 0.5-1 part of leveling agent and 0.5-1 part of defoaming agent. According to the PE pipe fitting, the service life of the pipe fitting can be prolonged.

Description

technical field [0001] The invention relates to the technical field of PE pipe fittings, in particular to a PE pipe fitting and a production process thereof. Background technique [0002] PE is polyethylene plastic, the most basic kind of plastic, plastic bags, plastic wrap, etc. are all PE, HDPE is a high crystallinity, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. PE has excellent resistance to most domestic and industrial chemicals, so many pipe fittings and pipes are produced using PE as the basic material, including underground gas pipelines. [0003] Among them, it is now found that in many pipeline accidents, more than 50% of the pipeline damage is caused by third-party damage (such as shoveling by excavators), which accounts for the largest proportion of all accidents. There are two major aspects that are construction defects and corrosion; these reasons lead to PE pipe fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/133F16L58/00F16L57/02C08L23/06
CPCC08L23/06C08L2203/18C08L2207/062F16L9/133F16L57/02F16L58/00C08L29/14C08L23/16C08K5/14C08K5/39C08L1/28C08K5/12C08K5/098C08L1/286
Inventor 李继成
Owner 湖北凯科塑业有限公司
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