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Production method of double-wall corrugated pipe

A double-wall corrugated pipe and production method technology, applied in the direction of coating, polyamide coating, etc., can solve the problems of single pipe composition, high price, difficult impact resistance, and inner layer wear resistance, etc., so as to improve economic efficiency and solve Recycling and improving the effect of uneven performance

Inactive Publication Date: 2021-04-20
TIANJIN JINGTONG PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the corrugated pipes use PVC resin as the main raw material and are prepared through modification. Although they can meet the market demand for corrugated pipes, because the raw materials are new products, the price is high, and the composition of the pipe is single, it is difficult to solve the problem of impact resistance, inner layer, etc. Wear resistance and other issues, for the current consumers who have more and more product requirements, it cannot meet the needs of consumers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0026] A kind of production method of double-wall corrugated pipe, concrete steps are:

[0027] S1. Weigh raw materials

[0028] Weigh the following raw materials in parts by weight: 50 parts of waste rigid PVC powder, 5 parts of coupling agent, 1 part of composite lead salt heat stabilizer, 5 parts of mica powder, 0.5 part of paraffin wax, 2 parts of colorant, 3 parts of antistatic masterbatch , 3 parts of impact-modified masterbatch, 2 parts of carbon nanotubes, 3 parts of color masterbatch;

[0029] S2, raw material mixing

[0030] Put the weighed raw materials in a high-speed kneader, mix and knead at a high speed for 12 minutes and discharge at a temperature of 115°C;

[0031] S3, stirring and cooling

[0032] Put the mixture in step S2 into a low-speed cold mixer for stirring, and discharge when the temperature reaches 45°C;

[0033] S4, feeding extrusion

[0034] The material in step S3 is fed into the extruder, the twin-screw speed of the inner layer material is 2...

specific Embodiment 2

[0044] A kind of production method of double-wall corrugated pipe, concrete steps are:

[0045] S1. Weigh raw materials

[0046] Weigh the following raw materials in parts by weight: 100 parts of waste hard PVC powder, 15 parts of coupling agent, 2 parts of composite lead salt heat stabilizer, 10 parts of mica powder, 1 part of paraffin wax, 4 parts of colorant, 5 parts of antistatic masterbatch , 5 parts of impact-modified masterbatch, 3 parts of carbon nanotubes, 5 parts of color masterbatch;

[0047] S2, raw material mixing

[0048] Put the weighed raw materials in a high-speed kneader, mix and knead at a high speed for 16 minutes and discharge at a temperature of 125°C;

[0049] S3, stirring and cooling

[0050] Put the mixture in step S2 into a low-speed cold mixer for stirring, and discharge when the temperature reaches 55°C;

[0051] S4, feeding extrusion

[0052] The material in step S3 is fed into the extruder, the twin-screw speed of the inner layer material is ...

specific Embodiment 3

[0062] A kind of production method of double-wall corrugated pipe, concrete steps are:

[0063] S1. Weigh raw materials

[0064] Weigh the following raw materials in parts by weight: 80 parts of waste hard PVC powder, 10 parts of coupling agent, 2 parts of composite lead salt heat stabilizer, 6 parts of mica powder, 0.8 part of paraffin wax, 3 parts of colorant, 4 parts of antistatic masterbatch , 4 parts of impact-modified masterbatch, 3 parts of carbon nanotubes, 4 parts of color masterbatch;

[0065] S2, raw material mixing

[0066] Put the weighed raw materials in a high-speed kneader, mix and knead at a high speed for 15 minutes and discharge at a temperature of 120°C;

[0067] S3, stirring and cooling

[0068] Put the mixture in step S2 into a low-speed cold mixer for stirring, and discharge when the temperature reaches 50°C;

[0069] S4, feeding extrusion

[0070] The material in step S3 is fed into the extruder, the twin-screw speed of the inner layer material is ...

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Abstract

The invention relates to a production method of a double-wall corrugated pipe. The production method comprises the following specific steps: weighing raw materials; putting the weighed raw materials into a high-speed kneading machine, conducting mixing and kneading at a high speed for 12-16 minutes, and conducting discharging at the temperature of 115-125 DEG C; putting the mixture into a low-speed cold mixer for stirring, and conducting discharging when the temperature reaches 45-55 DEG C; feeding the materials into an extruder, shaping the materials subjected to melt extrusion through a same neck mold, conducting vacuum sizing after shaping, and then conducting cooling, traction cutting and automatic flaring off-line; and coating the surface of the corrugated pipe, putting the corrugated pipe into a coating solution, controlling the time to be 5-8 minutes, then naturally cooling the corrugated pipe, and then cooling the corrugated pipe at 5-8 DEG C. The waste hard PVC material is used for preparing the double-wall corrugated pipe, the problem of recycling of the waste hard PVC material is solved, environmental protection is facilitated, the production cost of the double-wall corrugated pipe is reduced, and the performance of the pipe is improved through components in the raw materials.

Description

technical field [0001] The invention relates to the technical field of double-wall corrugated pipes, in particular to a production method of double-wall corrugated pipes. Background technique [0002] Double-wall corrugated pipe is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. It has strong external pressure resistance, low engineering cost, convenient construction, small friction coefficient, large flow rate, good low temperature resistance, and impact resistance. As well as good chemical stability and other advantages, it has been widely used. [0003] Most of the corrugated pipes use PVC resin as the main raw material and are prepared through modification. Although they can meet the market demand for corrugated pipes, because the raw materials are new products, the price is high, and the composition of the pipe is single, it is difficult to solve the problem of impact resistance, inner layer, etc. Wear resistance and other issues, for the curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L91/06C08L23/06C08L23/08C08K3/26C08K3/34C08K3/04C08K5/20C08K13/02C09D127/18C09D177/00C09D123/06C09D123/02C08J7/046
Inventor 郑伯通
Owner TIANJIN JINGTONG PIPE IND