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Cold-resistant high impact strength unplasticized polyvinyl chloride (PVC-U) composite pipe and preparation method thereof

A technology of PVC-U and composite pipes, applied in the direction of hoses, pipes, rigid pipes, etc., can solve the problems of low temperature toughness, cold resistance and poor thermal insulation, and achieve the effect of improving cold resistance, reducing damage, and reducing overall cost

Inactive Publication Date: 2015-11-18
大禹节水(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention mainly aims at the defects of low-temperature toughness, cold resistance and thermal insulation of PVC-U pipes, and provides a cold-resistant and high-impact PVC-U composite pipe. The irrigation system and the normal operation of the municipal pipe network in cold places play a certain role, and also reduce the investment cost

Method used

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  • Cold-resistant high impact strength unplasticized polyvinyl chloride (PVC-U) composite pipe and preparation method thereof

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Effect test

Embodiment 1

[0025] A cold-resistant and high-impact PVC-U composite pipe, comprising a three-layer structure, a PVC inner layer, a foamed PE middle layer and a PE outer layer, wherein the PVC inner layer is prepared from the following components in parts by weight:

[0026] 100 parts of PVC resin; 3.1 parts of calcium zinc stabilizer; 9 parts of light calcium carbonate filler; 0.4 parts of stearic acid and / or PE wax; 1.35 parts of processing aid ACR; 2.3 parts of toughening agent CPE; 0.1 parts of carbon black share.

[0027] The preparation method of the pipe is:

[0028] First, weigh the components for preparing the PVC inner layer, and then add them into the mixing pot in sequence, first perform hot mixing, the hot mixing temperature is 125°C, mix for 20-25min, and then cold mix, the cold mixing temperature 45°C, mix for 10-15min.

[0029] Secondly, the uniformly mixed material is added to the PVC pipe production line through an automatic feeding machine, and the inner layer of the p...

Embodiment 2

[0032] In this embodiment, the PVC layer is prepared from the following components in parts by weight:

[0033] 100 parts of PVC resin; 3.1 parts of calcium zinc stabilizer; 11 parts of light calcium carbonate filler; 0.5 parts of PE wax; 1.35 parts of processing aid ACR; 2.3 parts of toughening agent CPE; 0.1 part of carbon black.

[0034] Others are identical with embodiment 1.

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Abstract

The invention relates to a cold-resistant high impact strength unplasticized polyvinyl chloride (PVC-U) composite pipe and a preparation method thereof. The pipe is of a three-layer structure which sequentially includes an inner PVC layer, a middle foaming polyethylene (PE) layer and an outer PE layer. The preparation method includes the following steps that raw materials of the PVC layer are uniformly mixed, added into a PVC pipe production line and subjected to extrusion, setting, cooling, pulling, cutting and the like, so that an inner pipe layer is obtained; the middle foaming PE layer is composited on the inner PVC layer through a composite production line; meanwhile, the outer PE layer is composited on the middle layer, and a finished product is obtained. By means of the cold-resistant high impact strength PVC-U composite pipe and the preparation method thereof, cold resistance, shock resistance and thermal insulation property of the pipe are extremely improved; the adaptability of the plastic pipe to the environment is enhanced; meanwhile, the defect of poor cold resistance of the PVC-U pipe is overcome; excellent properties of PVC and PE pipes are integrated.

Description

technical field [0001] The invention belongs to the technical field of plastic pipes, and in particular relates to a cold-resistant high-impact PVC-U composite pipe and a preparation method thereof. Background technique [0002] With the rapid development of drip irrigation, sprinkler irrigation, micro-spray irrigation and other advanced irrigation technologies in my country, the matching pipes have also been developed rapidly, especially PVC-U pipes. PVC-U pipes have light weight, corrosion resistance, and water flow resistance. The advantages of small size, energy saving, quick installation, and low cost have been vigorously promoted, and it is an indispensable part of water-saving irrigation. However, at present, PVC-U pipes have problems such as poor cold resistance, thermal insulation and low-temperature impact resistance, especially in the northeast and colder places, such as pipes falling during loading and unloading and buried pipes freezing cracks, etc. phenomenon, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/12F16L11/06F16L11/12F16L59/02C08L27/06C08K13/02C08K3/04B29C47/92B29C48/92
CPCF16L9/121B29C48/92B29C2948/92209C08L27/06C08L2203/18C08L2205/03C08L2205/035F16L11/06F16L11/125F16L59/02F16L59/028C08L23/06C08L23/286C08K13/02C08K3/04C08K2003/265
Inventor 王冲保功辉李娇张超奇
Owner 大禹节水(天津)有限公司
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