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Method for preparing HDPE corrugated tube

A corrugated pipe and high-density polyethylene technology, which is applied in the field of HDPE corrugated pipe preparation, can solve the problems of low modulus, insufficient strength and rigidity of PE materials, etc., and achieve the goal of improving comprehensive performance, improving mechanical properties and increasing contact area Effect

Inactive Publication Date: 2017-12-08
GUANGXI JINSHENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PE material has the advantages of good low-temperature impact resistance and high flexibility, but because double-wall corrugated pipes have high requirements on the ring stiffness of the pipe, the shortcomings of PE material low modulus, insufficient strength and rigidity limit its application in double-wall corrugated pipes. Therefore, on the basis of maintaining a certain impact resistance and toughness, the research on how to strengthen and stiffen PE materials is a research hotspot on the modification of PE materials in recent years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of HDPE bellows comprises the following preparation steps:

[0021] 1) Weigh the high-density polyethylene, then add 5% of its mass of mica with a particle size of 5 μm, carry out the first high-speed kneading and mixing for 20 minutes, then add 0.5% of the mass of high-density polyethylene sodium tripolyphosphate, continue Carry out the second high-speed kneading and mixing for 40 minutes, send it into the extruder, cool to room temperature at a speed of 4°C / min, and granulate to obtain modified high-density polyethylene particles;

[0022] 2) Mix evenly with black color masterbatch with 1-4% of modified high-density polyethylene particles, transport to extruder, plasticize and extrude at 160°C, mold and press, cool and set to get the finished product.

[0023] The HDPE corrugated pipe with an inner diameter of 1200mm and a wall thickness of 5mm prepared in this implementation is based on GB / T19472.1-2004 "Polyethylene (PE) Structural Wall Piping...

Embodiment 2

[0026] The preparation method of HDPE bellows comprises the following preparation steps:

[0027] 1) Weigh high-density polyethylene, then add 6% of its mass of mica with a particle size of 4 μm, carry out the first high-speed kneading and mixing for 25 minutes, then add 0.4% of high-density polyethylene by mass of sodium tripolyphosphate, continue Carry out the second high-speed kneading and mixing for 45 minutes, send it into the extruder, cool to room temperature at a speed of 4°C / min, and granulate to obtain modified high-density polyethylene particles;

[0028] 2) Mix evenly with black color masterbatch with 1-4% of modified high-density polyethylene particles, transport to extruder, plasticize and extrude at 165°C, mold and press, cool and set to get the finished product.

[0029] The HDPE corrugated pipe with an inner diameter of 1200mm and a wall thickness of 5mm prepared in this implementation is based on GB / T19472.1-2004 "Polyethylene (PE) Structural Wall Piping Syst...

Embodiment 3

[0032] The preparation method of HDPE bellows comprises the following preparation steps:

[0033] 1) Weigh high-density polyethylene, then add 7% of its mass of mica with a particle size of 3 μm, carry out the first high-speed kneading and mixing for 25 minutes, then add 0.3% of high-density polyethylene by mass of sodium tripolyphosphate, continue Carry out the second high-speed kneading and mixing for 50 minutes, send it into the extruder, cool to room temperature at a speed of 3°C / min, and granulate to obtain modified high-density polyethylene particles;

[0034] 2) Mix evenly with black color masterbatch with 1-4% of modified high-density polyethylene particles, transport to extruder, plasticize and extrude at 165°C, mold and press, cool and set to get the finished product.

[0035] The HDPE corrugated pipe with an inner diameter of 1200mm and a wall thickness of 5mm prepared in this implementation is based on GB / T19472.1-2004 "Polyethylene (PE) Structural Wall Piping Syst...

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Abstract

The invention belongs to the technical field of preparation of tubes and particularly relates to a method for preparing an HDPE corrugated tube. The method comprises the following preparation steps: 1) weighing high-density polyethylene, then, adding mica, of which the mass is 5% to 9% that of the high-density polyethylene, into the high-density polyethylene, carrying out first-time high-speed kneaded milling for 20 to 30 minutes, then, adding sodium tripolyphosphate, of which the mass is 0.1% to 0.5% that of the high-density polyethylene, into the mixture, continuing to carry out second-time high-speed kneaded milling for 40 to 60 minutes, feeding the mixture to an extruder, and carrying out cooling and granulating, so as to obtain modified high-density polyethylene granules; 2) then uniformly mixing the modified high-density polyethylene granules with color master batch, of which the mass is 1% to 4% that of the modified high-density polyethylene granules, conveying the mixture to the extruder, carrying out plasticizing extrusion, carrying out die-pressing forming, and carrying out cooling sizing, thereby obtaining a finished product. According to the method provided by the invention, the ring stiffness and other mechanical properties of the HDPE corrugated tube are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of pipe preparation, in particular to a preparation method of HDPE bellows. Background technique [0002] HDPE double-wall bellows, referred to as PE bellows, was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. It is very mature in production process and application technology. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States. Double-wall corrugated pipe is a new type of lightweight pipe made of high-density polyethylene. It has the characteristics of light weight, high pressure resistance, good toughness, fast construction, and long life. Its excellent pipe wall structure design is different from other structures. Compared with pipe materials, the cost ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/34C08K3/32
CPCC08K3/34C08K3/32C08K2003/324C08K2201/003C08L2203/18C08L2207/062C08L2310/00C08L23/06
Inventor 韦俊有
Owner GUANGXI JINSHENG TECH DEV