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A self-cleaning anti-scaling and waxing polyolefin pipe and its preparation method and application

A polyolefin, anti-fouling technology, applied to pipes, rigid pipes, mechanical equipment, etc., can solve the problems of weak binding force and affecting the effect of continuous action, and achieve the effect of improving binding force, improving surface performance and reducing surface energy

Active Publication Date: 2021-08-24
ZHEJIANG WEIXING NEW BUILDING MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the weak binding force between it and polyolefin, it will be gradually taken away with the liquid transport in the pipeline and the scraping of impurities in the liquid, which will affect its continuous effect

Method used

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  • A self-cleaning anti-scaling and waxing polyolefin pipe and its preparation method and application
  • A self-cleaning anti-scaling and waxing polyolefin pipe and its preparation method and application
  • A self-cleaning anti-scaling and waxing polyolefin pipe and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 A self-cleaning anti-fouling and waxing polyolefin pipe is shown. The material of the inner layer 1 of the pipe is a blended material of a polyethylene modified material containing fluorine groups and a matrix polyethylene material; the pipe is co-extruded through a double layer Extruded by an extruder, the material of the outer layer 2 of the pipe is polyethylene material.

[0054] Such as figure 2 As shown, the fluorine-containing polyethylene modified material in the inner layer 1 of the pipe is a modified polyethylene with the polyethylene segment as the polyolefin main segment 4 and the fluorine-containing group segment 3 as the graft segment. Materials, wherein the polyethylene chain segment is HDPE, and the fluorine-containing group chain segment 3 is polyhexafluorobutyl acrylate.

[0055] The polyethylene modified material containing fluorine groups will migrate to a certain extent, and most of the fluorine-containing group segments 3 will ga...

Embodiment 2

[0063] A self-cleaning and anti-fouling and waxing polyolefin pipe, the inner layer of the pipe and the outer layer of the pipe are both polyethylene modified materials containing fluorine groups and UHMWPE blended materials.

[0064] The polyethylene modified material containing fluorine group is a modified polyethylene material with polyethylene segment as polyolefin main chain segment 4 and fluorine-containing group segment 3 as graft segment, wherein the polyethylene segment is LDPE, the fluorine-containing group segment 3 is polydodecafluoroheptyl acrylate.

[0065] The addition amount of the polyethylene modified material containing fluorine groups is 10wt%.

[0066] The mandrels used are mirror polished and coated with PTFE to ensure sufficiently low roughness.

[0067] The outer diameter of the tubing is 65mm and the inner diameter is 55mm. The produced pipe can be subsequently used as the inner pipe of the steel wire winding pipe.

Embodiment 3

[0069] An anti-fouling and waxy polyolefin pipe, such as figure 1 As shown, the pipe has a two-layer structure, the inner layer 1 of the pipe is a blend material of polyethylene modified material containing fluorine groups and PERT, and the outer layer 2 of the pipe is made of PERT.

[0070] The modified polyethylene material containing fluorine groups is a modified polyethylene material with polyethylene segment as the main polyolefin segment 4 and fluorine-containing group segment 3 as the grafted segment, wherein the polyethylene segment is PERT, the fluorine-containing group segment 3 is polytrifluoroethyl acrylate.

[0071] The addition amount of the polyethylene modified material containing fluorine groups in the blended material is 7.5wt%.

[0072] The ratio of pipe inner layer 1 to pipe outer layer 2 is: 1:5.

[0073] The outer diameter of the pipe is 25mm and the wall thickness is 2.8mm

[0074] The pipe is double-layer co-extruded and formed at one time. Among th...

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Abstract

The invention relates to a self-cleaning anti-fouling and waxing polyolefin pipe and its preparation method and application. The polyolefin pipe includes an inner layer of the pipe and an outer layer of the pipe, and the material of the inner layer of the pipe is modified polyolefin containing fluorine groups. The blend material of the material and the matrix polyolefin material, the material of the outer layer of the pipe is polyolefin material; the preparation method of the polyolefin pipe is: 1) blending the polyolefin modified material containing fluorine groups with the matrix polyolefin material, The blended material is obtained; 2) the blended material and the polyolefin material are double-layered and co-extruded to obtain a polyolefin pipe material that is anti-scaling and waxing; the polyolefin pipe material can be used to make a steel wire winding pipe inner pipe. Compared with the prior art, the present invention reduces the surface energy of the inner wall of the pipeline by introducing fluorine-containing group segments, so that the pipeline has the functions of anti-fouling and waxing. In addition, the introduction of fluorine-containing groups is also beneficial to improve the resistance High temperature resistance and corrosion resistance make this polyolefin pipe have a relatively broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of pipes, and relates to a self-cleaning and anti-scaling and waxing polyolefin pipe, a preparation method and application thereof. Background technique [0002] In the process of oil field water injection and crude oil transportation, due to changes in environmental conditions such as pressure and temperature and the adsorption between the fluid medium and the surface of the pipe, the wax and inorganic salts in the transportation medium will deposit on the pipe wall, forming a waxy scaling layer. The flow area is reduced and the conveying resistance is increased. Waxing and fouling reduce the flow area of ​​pipelines, increase frictional resistance, reduce pipeline transportation capacity, and even block pipelines in severe cases, causing major economic losses. In addition, the heating in the north is mainly centralized heating, and the water quality in the north is poor. After a period of operation, scale...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16L9/12B29C48/09B29C48/18
CPCB29K2023/0608B29C48/09B29C48/18F16L9/12
Inventor 应淑妮陈国贵冯金茂郑思珣李蕾
Owner ZHEJIANG WEIXING NEW BUILDING MATERIALS CO LTD