HDPE (high-density polyethylene) pipeline modification process

A pipe and modification technology, applied in the field of HDPE pipe modification technology, can solve the problems of low ring stiffness and high brittleness, and achieve the effects of improving aging resistance, improving brittleness and beautifying the appearance of products

Pending Publication Date: 2022-05-10
河北再美高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide a HDPE pipe modification process. The present invention can improve the defects of high brittleness and low ring stiffness of the HDPE pipe after cooling, and it is not easily oxidized and will not pollute plastic products. , improve the service life of HDPE pipe and prolong the service life

Method used

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  • HDPE (high-density polyethylene) pipeline modification process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A process for modifying HDPE pipes, comprising the following steps:

[0019] The composition in parts by mass is as follows:

[0020] S1, cleaning: put 70 parts of HDPE raw materials and 8 parts of cleaning agent into the cleaning tank for cleaning; S2, drying: take out the HDPE raw materials cleaned in step S1, put it into a dryer to dry for 30min; S3, mix: put S2 In the step, 70 parts of dried HDPE raw materials, 1 part of toughening agent, 2,6-tertiary butyl-4-methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide A total of 0.2 parts and 0.5 parts of the plastic high-efficiency defoamer water-absorbing masterbatch are put into the mixer for mixing, the set temperature is 105 ° C, and the mixing is 60 minutes, so that the ingredients are stirred and mixed evenly; S4, extrusion: when the mixer The temperature is lowered to 40°C, the mixture is taken out and dried at 70°C for 2 hours, fed into the extruder by a vacuum feeder, and the HDPE pipe is extruded and f...

Embodiment 2

[0022] A process for modifying HDPE pipes, comprising the following steps:

[0023] The composition in parts by mass is as follows:

[0024] S1, cleaning: put 70 parts of HDPE raw materials and 8 parts of cleaning agent into the cleaning tank for cleaning; S2, drying: take out the HDPE raw materials cleaned in step S1, put it into a dryer to dry for 30min; S3, mix: put S2 In the step, 70 parts of dried HDPE raw materials, 1 part of toughening agent, 2,6-tertiary butyl-4-methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide , 0.2 part of tetra[beta-(3,5-tertiary butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester, and 0.5 part of water-absorbing master batch of high-efficiency plastic defoamer are put into the mixer to mix, set The temperature is 105°C, and the material is mixed for 60 minutes; S4, extrusion: when the temperature in the mixer drops to 40°C, the mixture is taken out and dried at 70°C for 2 hours. The machine extrudes the HDPE pipe; S5. Cooling...

Embodiment 3

[0026] A process for modifying HDPE pipes, comprising the following steps:

[0027] The composition in parts by mass is as follows:

[0028] S1, cleaning: put 70 parts of HDPE raw materials and 8 parts of cleaning agent into the cleaning tank for cleaning; S2, drying: take out the HDPE raw materials cleaned in step S1, put it into a dryer to dry for 30min; S3, mix: put S2 In the step, 70 parts of dried HDPE raw materials, 3 parts of toughening agent, 2,6-tertiary butyl-4-methylphenol, bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide A total of 0.5 parts and 1 part of the high-efficiency plastic defoamer water-absorbing masterbatch are put into the mixer for mixing, the set temperature is 105 ° C, and the mixing is 60 minutes; S4, extrusion: When the temperature in the mixing machine drops to 40 ° C, mix The material is taken out and dried at 70°C for 2 hours, and is fed into the extruder by a vacuum feeder, and the HDPE pipe is extruded and formed by the extruder; S5, cooling:...

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Abstract

The invention discloses an HDPE (high-density polyethylene) pipeline modification process, and belongs to the technical field of HDPE pipelines, the HDPE pipeline modification process comprises the following steps: S1, cleaning: putting an HDPE raw material and a cleaning agent into a cleaning pool together for cleaning; s2, drying: taking out the HDPE raw material cleaned in the step S1, and drying the HDPE raw material in a drying machine for 30-40 minutes; s3, mixing: putting the HDPE raw material dried in the step S2, a toughening agent, an antioxidant and a defoaming agent into a mixer for mixing, setting the temperature to be 105-110 DEG C, and mixing for 60-80 minutes; s4, extruding: when the temperature in the mixer is reduced to 40 DEG C, taking out the mixed material, drying at 70-80 DEG C for 2 hours, feeding into an extruder by using a vacuum feeding machine, and extruding and forming the HDPE pipeline by using the extruder; s5, cooling is conducted, specifically, the formed HDPE pipeline is cooled, and fixed-length cutting is conducted; and S6, warehousing is conducted, specifically, the HDPE pipelines subjected to fixed-length cutting are sequentially inspected, printed with marks and warehoused as finished products. According to the invention, the problems of high brittleness and low ring stiffness of the cooled HDPE pipeline are effectively improved, the product performance is improved, and the service life of the HDPE pipeline is prolonged.

Description

technical field [0001] The invention relates to a modification process of HDPE pipes, belonging to the technical field of HDPE pipes. Background technique [0002] With the rapid development of the economy and the continuous progress of society, developing a circular economy and building a resource-saving and environment-friendly society is an inevitable way to ensure that our human beings can enjoy the achievements of civilization created by themselves for a long time. Therefore, various resource-saving , Environmentally friendly products have been continuously developed and entered the market, which is greatly encouraged by the government and favored by people. , HDPE is a kind of high crystallinity, non-polar thermoplastic resin, HDPE pipe is formed by hot extrusion, it has the characteristics of corrosion resistance, smooth inner wall, low flow resistance, high strength, good toughness, light weight, etc., but the same high The density polyethylene (HDPE) pipe also has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/00C08L25/04C08K5/13C08K5/375C08K5/134C08J3/22B29D23/00
CPCC08L23/06C08J3/22B29D23/001C08L2207/062C08L2203/18C08L2201/08C08J2323/06C08J2423/00C08J2425/04C08L23/00C08L25/04C08K5/13C08K5/375C08K5/1345
Inventor 李君彦赵全义李飞
Owner 河北再美高分子材料有限公司
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