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Regenerated polyethylene composition and preparation method thereof

A technology of recycled polyethylene and its composition, which is applied in the field of recycled polyethylene composition and its preparation, can solve the problems of unsatisfactory processability, melt strength and elongation at break of recycled polyethylene pipes, and achieve good thermal stability and service life, improved tensile strength and melt strength, and good thermal stability

Active Publication Date: 2013-10-23
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention utilizes the recycling of waste polyethylene and the preparation of polyethylene pipes in a one-step process. After modification, the materials are directly extruded by the melt pump without cooling to save electric energy. Strength and elongation at break are not ideal

Method used

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  • Regenerated polyethylene composition and preparation method thereof
  • Regenerated polyethylene composition and preparation method thereof
  • Regenerated polyethylene composition and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1～11

[0028] The raw material characteristics and component distribution of the recycled polyethylene composition of the present invention are shown in Table 1 and Table 2.

[0029] Table 1 Embodiment 1~6 recycled polyethylene composition raw material characteristics and component distribution ratio (by weight)

[0030]

[0031] Table 2 Embodiment 7-11 Regenerated polyethylene composition raw material characteristics and component distribution ratio (by weight)

[0032]

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Abstract

The invention provides a regenerated polyethylene composition and a preparation method thereof, and belongs to the technical field of recovery processing of waste plastics. The regenerated polyethylene composition comprises the following components in parts by weight: 75 to 85 parts of PE (Poly Ethylene) bottle cap material, 10 to 20 parts of PE large blow molding grade, 4 to 5 parts of carbon black masterbatch, 0 to 0.2 part of processing agent, 0.05 to 0.25 part of crosslinking agent, and 0.18 to 0.35 part of antioxidant. The composition has relatively high flexural modulus and elongation at break as well as high processing performance; the melt strength of the composition is 10 times that of the recovered bottle cap material; the tensile strength ranges from 25.4 to 29.4MPa; the oxidative induction time (200 DEG C) is 38 to 71 minutes, and therefore, a tubing composition is ensured to have high thermal stability and long service life. The composition can be directly used for manufacturing a pipe, and also can be used as a raw material to be added to a special material for a marketed double-wall corrugated pipe to produce large-aperture double-wall corrugated pipes, winding pipes or the like with different specifications and apertures and capable of draining water and sewage, and more than 10% of the production cost can be decreased.

Description

technical field [0001] The invention belongs to the technical field of recycling and processing of waste plastics, and in particular relates to a recycled polyethylene composition and a preparation method thereof. Background technique [0002] Polyethylene is a material with a large output and a wide range of uses in thermoplastics. It is polymerized from ethylene and can be processed by the molding method of general thermoplastics. Polyethylene is mainly divided into three categories: low-density polyethylene (LDPE), high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE). [0003] With the rapid development of my country's plastics industry, waste plastics after processing and production or use are increasing day by day. According to statistics from the China Plastics Processing Industry Association, the current annual production of waste plastics in China is about 10 million tons, plus the annual import of nearly 5 million tons, the overall possessio...

Claims

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Application Information

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IPC IPC(8): C08L23/04C08K13/02C08L27/12C08L23/06C08K3/04C08K5/14C08K5/5425C08K5/134C08K5/101C08K5/526C08J11/16C08J11/20C08J11/22C08J11/18B29B9/06B29B7/00B29C47/60B29C48/40
CPCB29C48/40
Inventor 王群涛王日辉唐岩郭锐苑东兴徐素兰
Owner CHINA PETROLEUM & CHEM CORP
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