HDPE reclaimed material, preparation method thereof and HDPE pipe

A technology of recycled materials and pipes, which is applied in the field of its preparation, HDPE recycled materials, and HDPE pipes, can solve the problems of high impact strength and low flexural modulus of HDPE recycled materials.

Pending Publication Date: 2021-02-23
CHINA GEZHOUBA GRP LVYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of HDPE regenerated material, its preparation method and HDPE pipe material, the HDPE regenerated material in the present invention has low flexural modulus, high impact strength, and solves the compatibility problem of impurities

Method used

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  • HDPE reclaimed material, preparation method thereof and HDPE pipe

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preparation example Construction

[0025] The invention provides a kind of preparation method of HDPE recycled material, comprises the following steps:

[0026] A) crushing the extrusion-grade HDPE recycled material to obtain the crushed material;

[0027] B) mixing the crushed material, crosslinking agent and inorganic filler, extruding and granulating to obtain HDPE recycled material;

[0028] In the extrusion-grade HDPE recycled material, the content of HDPE is >90wt%;

[0029] The crosslinking agent is an aromatic crosslinking agent and / or an aliphatic crosslinking agent;

[0030] The mass ratio of the broken material, the crosslinking agent and the inorganic filler is 100:(0.01-0.05):(0.2-2.0).

[0031] In the present invention, the extrusion-grade HDPE recycled material is preferably sorted and cleaned, crushed, rinsed, dehydrated and dried to obtain HDPE broken material.

[0032] In the present invention, the extrusion-grade HDPE recycled material contains a certain amount of impurities, wherein the H...

Embodiment 1

[0049] (1) Wash the polyethylene small hollow material with water and a cleaning agent, dehydrate and dry it, and then crush it into materials of similar size to obtain a polyethylene crushed material with a particle size of 6 mm to 20 mm; after testing the melt flow index of the polyethylene crushed material It is 2g / 10min.

[0050] (2) Fully stir 0.5 parts by weight of glycidyl methacrylate and 3 parts by weight of talcum powder in a high-speed mixer for 40s, and the speed of the high-speed mixer is 35HZ; add 100 parts by weight of polyethylene obtained in step (1) The crushed material was continuously stirred for 20 seconds to obtain a mixed material.

[0051] (3) The mixture obtained in step (2) was extruded and granulated in a twin-screw extruder at a temperature of 200° C. and a screw speed of 300 rpm to obtain a special material for pipes.

Embodiment 2

[0053] (1) Wash the polyethylene small hollow material with water and a cleaning agent, dehydrate and dry it, and then crush it into materials of similar size to obtain a polyethylene crushed material with a particle size of 6 mm to 20 mm; after testing the melt flow index of the polyethylene crushed material It is 2g / 10min.

[0054] (2) the triallyl cyanurate (TAIC) of 0.1 weight part and the calcium carbonate of 0.3 weight part are fully stirred 40s in high-speed mixer, and the rotating speed of described high-speed mixer is 35HZ; Add 100 weight part steps (1 ) The polyethylene crushed material obtained continues to stir for 20 s to obtain a mixed material.

[0055] (3) The mixture obtained in step (2) was extruded and granulated in a twin-screw extruder at a temperature of 200° C. and a screw speed of 300 rpm to obtain a special material for pipes.

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Abstract

The invention provides an HDPE reclaimed material and a preparation method thereof, and the preparation method comprises the following steps: A) crushing an extrusion grade HDPE reclaimed material toobtain a crushed material; and B) mixing the crushed material, a cross-linking agent and an inorganic filler, and carrying out extrusion granulation to obtain the HDPE reclaimed material, wherein thecross-linking agent is an aromatic cross-linking agent and/or an aliphatic cross-linking agent. Compared with the prior art, the preparation method provided by the invention has the advantages that the recycled waste polyethylene small hollow material containing 10% of other plastic impurities is used as a main raw material, the molecular weight and the flowability of polyethylene are regulated and controlled by adopting a chemical repairing means, the molecular chain segment length of the material is increased through a chain extension reaction, and the material is endowed with high flexibility, and mechanical properties of impact strength is improved; meanwhile, the problem of compatibility of impurities in the crushed material raw materials and main body plastic is solved, and the special pipe material with excellent ring flexibility is prepared. The invention further provides a HDPE pipe.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a recycled HDPE material, a preparation method thereof and an HDPE pipe. Background technique [0002] Polyethylene is one of the most widely used thermoplastics in plastics. It is polymerized from ethylene and can be processed by general thermoplastic molding methods. Polyethylene can be divided into low-density polyethylene (LDPE), high-density polyethylene Polyethylene (HDPE) and linear low-density polyethylene (LLDPE) three categories. [0003] With the rapid development of plastic technology, waste plastics after processing, production and use are increasing day by day. A large amount of waste plastics that are not naturally degradable will cause serious environmental pollution. At the same time, plastics are made of natural resources such as oil, natural gas, and coal. Synthetic, in the case of scarcity of natural resources, the abandonment of a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K3/34C08K5/1515C08K5/3492C08K3/26C08K5/12
CPCC08K3/34C08K5/1515C08K5/34924C08K3/26C08K5/12C08K2003/265C08L2207/062C08L2203/18C08L23/06
Inventor 张梦迪崔红军王步军王昕胡天乐陈方洲
Owner CHINA GEZHOUBA GRP LVYUAN TECH CO LTD
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