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Special cross-linked polyethylene material for rotational molding and preparing process thereof

A technology of cross-linked polyethylene and special material, applied in the field of cross-linked polyethylene special material for rotomolding and its preparation, can solve the problem of poor processability of LLDPE, heat resistance, creep resistance, low temperature impact resistance and swelling resistance, limiting LLDPE Application range and other issues, to achieve the effect of good permeability and chemical resistance, good rotomolding performance and good fluidity

Inactive Publication Date: 2004-09-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LLDPE still has defects such as poor processability, thermal creep resistance, low temperature impact resistance, and swelling resistance, which undoubtedly limit the application range of LLDPE.

Method used

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  • Special cross-linked polyethylene material for rotational molding and preparing process thereof
  • Special cross-linked polyethylene material for rotational molding and preparing process thereof
  • Special cross-linked polyethylene material for rotational molding and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] formula:

[0019] LLDPE 7042 70 kg

[0020] LDPE 1F7A 30 kg

[0021] Dicumyl peroxide 4.5kg

[0022] Antioxidant 1010 500g

[0023] Preparation: Mix the raw materials prepared according to the formula evenly in a high-speed mixer, and then blend on a double-roll mill, and the blending temperature is 130-140°C. The next piece was crushed.

example 2

[0025] formula:

[0026] LLDPE 7042 90 kg

[0027] LDPE 1F7A 10kg

[0028] 2,5 dimethyl-2,5 di-tert-butyl hexane 1 kg

[0029] Dilauryl Thiodipropionate 900g

[0030] Preparation: The method is the same as the preparation method of Example 1.

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PUM

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Abstract

The invention relates to a crosslinked polyethylene single-purpose material for rotational moulding which comprises (by weight percent) linear low density polyethylene 70-90%, low density polyethylene 10-30%, cross linking agent 0.5-5%, anti-oxidant 0.1-1%. The invention also relates to the process for preparing the special-purpose material. The rotational moulding product prepared by the single-purpose material has good processing characteristics, fine impact strength, thermal creep resistance and low-temperature flexibility, good penetrability resistance and chemical environmental resistance.

Description

technical field [0001] The invention relates to a special cross-linked polyethylene material for rotational molding and a preparation method thereof. Background technique [0002] Rotational molding is one of the methods of forming large and medium-sized products. This process originated in the United States in the 1940s. Due to various reasons, it has developed slowly and is limited to the processing of a few plastic products. In recent years, due to the development of plastics and their powdering, the gradual expansion of the application field of plastics, and the superiority of this process, it is developing rapidly. At present, the proportion of various types of rotationally molded polyethylene materials in foreign countries is roughly: 65% for linear low-density polyethylene (LLDPE), 20% for cross-linked polyethylene (XHDPE), 10% for high-density polyethylene (HDPE), and 10% for low-density polyethylene (LDPE). Polyethylene (LDPE) is 5%. In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/14C08L23/06
Inventor 张成业石大川王龙辉
Owner PETROCHINA CO LTD
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