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A kind of high density low temperature resistant polyethylene material and its preparation method

A technology of low temperature resistance and polyethylene, which is applied in the field of high density and low temperature resistant polyethylene materials and its preparation, can solve the problems of performance changes, brittle polyethylene materials, poor chemical stability, etc., and achieve a smooth surface and high strength. Effect

Active Publication Date: 2021-05-28
上海高分子功能材料研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as the temperature is lower, the performance of polyethylene material will change sharply with the decrease of temperature. When the temperature is lower, polyethylene material will become brittle, making it unusable
Chinese patent 2015104391850 mentions a low-temperature-resistant PVC sheet and its preparation method, using PVC as the main resin, adding a small amount of ultra-high molecular weight polyethylene, and extruding the sheet to make the sheet, but it does not mention whether the surface of the sheet is smooth or not And low temperature, and PVC is a polar material, the chemical stability is not as good as non-polar PE material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Weigh 80 parts of ultra-high molecular weight polyethylene resin, 20 parts of polyethylene resin, 0.8 part of antioxidant, 0.5 part of lubricant and 1 part of pigment.

[0014] The relative density of the ultra-high molecular weight polyethylene resin is 0.935, and the molecular weight is 5 million. The polyethylene resin has a relative density of 0.940 and a melt index of 2.0 g / 10 min at a temperature of 190° C. and a condition of 2160 g.

[0015] The antioxidant is tetrakis[3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionic acid]pentaerythritol, and the lubricant is polyethylene wax.

[0016] When preparing, weigh the above-mentioned materials, and then put the weighed raw materials into the high-speed mixer at the same time. When the mixing reaches 500 seconds, observe the color and color dispersion, and then mix for 1000 seconds, and then discharge.

[0017] Adjust the thickness of the mold according to the required thickness, then put the mixed raw materials into t...

Embodiment 2

[0019] Weigh 70 parts of ultra-high molecular weight polyethylene resin, 30 parts of polyethylene resin, 1 part of antioxidant, 0.8 part of lubricant and 1.2 parts of pigment.

[0020] The relative density of the ultra-high molecular weight polyethylene resin is 0.935, and the molecular weight is 3 million. The polyethylene resin has a relative density of 0.935 and a melt index of 1.0 g / 10 min at a temperature of 190° C. and a condition of 2160 g.

[0021] The antioxidant is 4,4'-thiobis(6-tert-butyl-3-methylphenol), and the lubricant is siloxane.

[0022] When preparing, weigh the above-mentioned materials, and then put the weighed raw materials into the high-speed mixer at the same time. When the mixing reaches 500 seconds, observe the color and color dispersion, and then mix for 1200 seconds, and then discharge.

[0023] Adjust the thickness of the mold according to the required thickness, then put the mixed raw materials into the mold, first use the point pressure method ...

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PUM

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Abstract

The invention relates to the field of materials, in particular to a high-density low-temperature-resistant polyethylene material and a preparation method thereof. It is made of the following raw materials in parts by mass: 70-80 parts of ultra-high molecular weight polyethylene resin, 20-30 parts of polyethylene resin, 0.5-2 parts of antioxidant, 0.1-1 part of lubricant and 0.1-2 parts of pigment; The relative density of the ultra-high molecular weight polyethylene resin is 0.920-0.960, and the molecular weight is between 2 million and 6 million. Compared with the prior art, the present invention still has extremely high strength, toughness and corrosion resistance below -180°C, can be processed into plastic parts of various shapes, and has a flat and smooth surface, and is suitable for devices in various low-temperature environments components.

Description

technical field [0001] The invention relates to the field of materials, in particular to a high-density low-temperature-resistant polyethylene material and a preparation method thereof. Background technique [0002] Polyethylene material has excellent low temperature resistance, usually at -70°C, it can still maintain excellent performance. But as the temperature gets lower, the performance of polyethylene material will change sharply with the decrease of temperature. When the temperature is lower, polyethylene material will become brittle, making it unusable. Chinese patent 2015104391850 mentions a low-temperature-resistant PVC sheet and its preparation method, using PVC as the main resin, adding a small amount of ultra-high molecular weight polyethylene, and extruding the sheet to make the sheet, but it does not mention whether the surface of the sheet is smooth or not And low temperature, and PVC is a polar material, its chemical stability is not as good as that of non-p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06
Inventor 穆肖斌李骥安
Owner 上海高分子功能材料研究所