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Compound double-wall corrugated pipe and preparation process thereof

A double-wall corrugated pipe and preparation technology, applied in the direction of hoses, pipes, mechanical equipment, etc., can solve the problems of poor rigidity and toughness, low compressive strength, and easy brittle failure, so as to improve the mechanical properties and improve the toughness of products , The effect of low manufacturing cost

Inactive Publication Date: 2010-06-30
山东华信塑胶股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is often a contradiction between the ring stiffness and toughness of pipes in actual production, and it is difficult to grasp the balance between ring stiffness and toughness. High-density polyethylene resin has good toughness but poor rigidity, and the ring stiffness of double-wall bellows produced by polyethylene alone is very low It is difficult to meet the requirements of national standards, and the compressive strength is small, which is difficult to meet the actual use needs; while polypropylene resin has high rigidity but poor toughness, especially in low temperature environments, it is prone to brittle failure, which seriously affects the service life of pipes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) By weight, extrude high-density polyethylene, random copolymerized polypropylene (PP-R), silane coupling agent, inorganic rigid particle calcium carbonate, black masterbatch, blue masterbatch, defoamer ( For a commercially available product, such as Jining Zhongtian, the same below), mix at 80°C for 3 minutes;

[0034] 2) Put the above mixture into the cold mixer to cool to 35°C, and put it into the drying silo;

[0035] 3) The mixture in the drying silo is extruded into the pipe with a double-host single-screw device. The process parameters are selected as follows: body temperature: 140°C, confluence core temperature: 160°C, head temperature: 185°C; host-speed: 10 rev / min, host second speed: 10 rev / min;

[0036] 4) The extruded pipe is formed by module, vacuum and cooling;

[0037] 5) Cut to length and pack.

Embodiment 2

[0039] 1) In parts by weight, mix high-density polyethylene, block polypropylene (PP-B), aluminate coupling agent, rigid particles, black masterbatch, blue masterbatch, and defoamer at 90°C 3 minutes.

[0040] 2) Put the above mixture into the cold mixer to cool to 45°C, and put it into the drying silo;

[0041] 3) The mixture in the drying silo is extruded into the pipe with a double-host single-screw equipment. The process parameters are selected as follows: body temperature: 195°C, confluence core temperature: 170°C, head temperature: 200°C; host-speed: 100 rev / min, main engine 2 speed: 100 rev / min;

[0042] 4) The extruded pipe is formed by module, vacuum and cooling;

[0043] 5) Cut to length and pack.

Embodiment 3

[0045] 1) In parts by weight, mix high-density polyethylene, homopolypropylene (PP-H), titanate coupling agent, rigid particles, black masterbatch, blue masterbatch, and defoamer at 85°C 3 minutes.

[0046] 2) Put the above mixture into the cold mixer to cool to 40°C, and put it into the drying silo;

[0047] 3) The mixture in the drying silo is extruded into the pipe with a double-host single-screw equipment. The process parameters are selected as follows: body temperature: 185°C, confluence core temperature: 162°C, head temperature: 190°C; host-speed: 20 rev / min, host second speed: 20 rev / min;

[0048] 4) The extruded pipe is formed by module, vacuum and cooling;

[0049] 5) Cut to length and pack.

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PUM

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Abstract

The invention discloses a compound double-wall corrugated pipe, which is prepared from the following components in part by weight: 100 parts of mixture of polythene and polypropylene, 3-10 parts of coupling agent, 3-10 parts of rigid particle, 2-6 parts of master batch, 2-6 parts of blue batch and 3-9 parts of defoaming agent. The preparation process comprises the following steps of: evenly mixing the components in a high-speed mixer; after evenly mixing in a cold mixer, extruding tubes by using a double-host single screw extruder; modulizing, vacuumizing and cooling the tubes to form; and fixing the length and cutting and packaging the tubes. With the blending and the modification of polypropylene and polythene and the use of the rigid particles, the compound double-wall corrugated pipe well solves the problem of strong and unyielding balance, i.e. the tubes has higher toughness while having high annular rigidity. The tubes are made of completely non-toxic raw material and have good sanitary performance as well as the characteristic of simple production process.

Description

technical field [0001] The invention relates to a composite double-wall corrugated pipe and a preparation process thereof, belonging to the technical field of polyethylene double-wall corrugated pipes for drainage. Background technique [0002] The polyethylene double-wall corrugated pipe for drainage is made of polyethylene resin as the main raw material, adding appropriate amount of additives, and extruded. It is a new type of pipe suitable for outdoor drainage of buildings and municipal sewage. It has the advantages of light weight, small drainage resistance, high compressive strength, corrosion resistance, and convenient construction. It is an ideal material to replace cast iron pipes and cement pipes. At present, there is often a contradiction between the ring stiffness and toughness of pipes in actual production, and it is difficult to grasp the balance between ring stiffness and toughness. High-density polyethylene resin has good toughness but poor rigidity, and the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/11B29C47/92B29C48/92
Inventor 刘建龙滕谋勇侯典军孙刚瑞董克刚潘光岩
Owner 山东华信塑胶股份有限公司
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