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Preparation method and production facility of high-creep-resistance five-layer oxygen-barrier plastic pipe

A plastic pipe and creep technology is applied in the manufacturing field of high creep resistance five-layer oxygen barrier plastic pipe, which can solve the problems of low production efficiency, difficulty in meeting cross-linking degree requirements and high production cost, so as to improve production efficiency. Efficiency, improving oxygen barrier rate and creep resistance, and reducing the effect of dosage

Inactive Publication Date: 2015-10-14
ZHEJIANG MAILER PAIKESIE PIPELINE SYST CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0004] Therefore, the technical problem to be solved by this invention is to overcome the technical defects of low production efficiency, high production cost and difficulty in meeting the cross-linking degree requirements in the existing cross-linked polyethylene plastic pipe preparation method, thereby providing a production method Preparation method of high creep resistance five-layer oxygen-barrier plastic pipe with high efficiency, low production cost and ability to meet cross-linking degree requirements

Method used

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  • Preparation method and production facility of high-creep-resistance five-layer oxygen-barrier plastic pipe

Examples

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Embodiment 1

[0029] refer to figure 1 , the present embodiment provides a method for preparing a high-creep-resistant five-layer oxygen-barrier plastic pipe, comprising the following steps:

[0030] A, mix the high-density polyethylene that is 98% by weight, the antioxidant that is 0.1% by weight, and the peroxide that is 0.8% by weight, and mix them uniformly, and carry out extrusion treatment to the mixture under the condition of high temperature and high pressure , to obtain tube embryos, wherein the antioxidant is 3-methyl-6-butyl phenol, and the peroxide is dicumyl peroxide;

[0031] B. Irradiating the tube embryo prepared in step A with infrared light at 230° C. to obtain a crosslinked pe-xa inner tube;

[0032] C. Cool the cross-linked pe-xa inner tube.

[0033] The above technical solution is the core technical solution of this embodiment. In step A, first, the peroxide, antioxidant and high-density polyethylene can be uniformly mixed, so that the crosslinking of the plastic pipe...

Embodiment 2

[0039] This example provides a method for preparing a high-creep-resistant five-layer oxygen-barrier plastic pipe, which is different from Example 1 in that the weight part of polyethylene is 95, the weight part of antioxidant is 0.8, The weight part of the oxide is 0.9, and the tube embryo prepared in step A is irradiated with infrared light at 235°C.

Embodiment 3

[0041] This example provides a method for preparing a high-creep-resistant five-layer oxygen-barrier plastic pipe, which is different from Example 1 in that the weight part of polyethylene is 99.9, the weight part of antioxidant is 0.1, and The weight part of the oxide is 0.1, and the tube embryo prepared in step A is irradiated with infrared light at 240°C.

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Abstract

The invention discloses a preparation method and production facility of a high-creep-resistance five-layer oxygen-barrier plastic pipe. An infrared crosslinking method is utilized to perform crosslinking reaction on a pipe billet: in the crosslinking reaction process, polyethylene molecules in the pipe billet move vigorously, so that the moving polyethylene molecules can perform crosslinking reaction with peroxides more easily; and since the intermolecular pipe billet motion can enhance all parts in the pipe billet to a consistent temperature, the infrared crosslinking can effectively enhance the crosslinking degree of the pipe billet and enhance the production efficiency as compared with common heat radiation crosslinking, and thus, under the conditions of achieving the same crosslinking degree, the infrared crosslinking method can effectively enhance the production efficiency and lower the peroxide consumption. Therefore, the plastic pipe prepared by the preparation method has higher crosslinking degree, and thus, has higher oxygen barrier rate and creep resistance than the plastic pipe prepared by the existing heat radiation method.

Description

technical field [0001] The invention relates to a manufacturing method and equipment for a high creep resistance five-layer oxygen barrier plastic pipe, belonging to the technical field of plastic pipes. Background technique [0002] Hot water floor heating is a hidden project, which is difficult to maintain and requires extremely high safety and reliability. People hope that the floor heating pipes can last as long as the building. However, the existing floor heating pipes are mainly plastic pipes with good heat resistance and easy bending construction. Among them, creep is one of the important factors affecting the life of floor heating pipes. Therefore, in order to improve the life of the floor heating system, plastic pipes with high creep resistance are generally used. Common plastic pipes include PE pipes, that is, high-density polyethylene pipes, which have a relatively high permeability to oxygen. Oxygen passes through the pipe wall and enters the conveyed medium, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/13C08K5/14C08J3/24C08J3/28B32B27/06B32B27/32
CPCC08L23/06B32B27/06B32B27/32C08J3/24C08J3/28C08K5/13C08K5/14C08L2201/14C08L2203/18C08L2207/062
Inventor 陈立楠陈成放刘志刚余进东
Owner ZHEJIANG MAILER PAIKESIE PIPELINE SYST CO LTD
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