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
CN105065792AInactive Publication Date: 2015-11-18大禹节水(天津)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
大禹节水(天津)有限公司
Publication Date
2015-11-18
Estimated Expiration
Not applicable · inactive patent

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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