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Crease-proof fire-proof heat-conductive and electrically insulating plastic composition and its prepn

A plastic composition, heat conduction and insulation technology, applied in the field of insulation sheets, can solve the problem of affecting the product's flame retardancy, flexural resistance, thermal conductivity, environmental protection, flame retardancy and insulating polypropylene materials, which have not been seen in the world and cannot pass the test, etc. question

Inactive Publication Date: 2005-07-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But until now, there is no polypropylene material with flexural resistance, thermal conductivity, environmental protection, flame retardancy and insulation.
Moreover, in the previous research, we tried to combine the above disclosed information, using polypropylene, aluminum oxide, pentaerythritol phosphate and melamine polyphosphoric acid to directly blend and extrude, and press it into a 0.4mm sheet, but it could not pass UL94- V2 test
Obviously, due to the addition of a large amount of alumina and the thickness of the sheet, the flame retardant effect of the product is affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix 0.875kg of pentaerythritol phosphate, 2.625kg of melamine polyphosphate, 6.5kg of polypropylene copolymer, 0.03kg of antioxidant, and 0.05kg of silane coupling agent in a high-speed mixer for 3 minutes, and then pass the mixture through a single-screw extruder Melt and extrude at 170-210°C, cool and granulate. Mix 4kg of dried pellets, 6kg of alumina and 0.05kg of silane coupling agent in a high-speed mixer for 3 minutes, then melt and extrude the mixture through a single-screw extruder at 170-210°C, cool and granulate to obtain The plastic composition of the present invention. The plastic composition was placed on a flat vulcanizing machine at a temperature of 210°C and pressed into a sheet of specified thickness, and tested for UL94 flame retardancy, thermal conductivity and breakdown strength. The test results are listed in Table 1.

Embodiment 2

[0022] The method described in Example 1 was repeated, but mixed extrusion was carried out with 5 kg of dried pellets and 5 kg of alumina. The test results are listed in Table 1.

Embodiment 3

[0024] The method described in Example 1 was repeated, but mixed extrusion was carried out with 3 kg of dried pellets and 7 kg of alumina. The test results are listed in Table 1.

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PUM

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Abstract

The present invention relates to one kind one polypropylene-base plastic composition and its preparation process. The composition contains alumina 50-80 wt% and fireproof polypropylene composition 20-50 wt%. The fireproof polypropylene composition consists of pentaerythritol phosphate and melamine polyphosphate in the ratio of 1 to 2-4 in 28-40 wt%, propylene monopolymer in 0-30 wt% and propylene copolymer in 30-72 wt%. The insulating sheet made of the composition has excellent breaking performance, fireproof performance, heat conductance and electric insulating performance, is environment friendly and may be used in electric equipment and electronic equipment products.

Description

technical field [0001] The present invention relates to a plastic composition, a method for preparing the composition, and an insulating sheet using the composition, and more particularly, the present invention relates to a polypropylene having bending resistance, flame retardancy, thermal conductivity and insulation A base plastic composition, a method for preparing the composition, and an insulating sheet using the composition. Background technique [0002] At present, the use of many electronic and electrical equipment (such as televisions and computers) will generate a lot of heat, and the accumulation of these heat will inevitably damage the electronic components inside. In order to dissipate heat as soon as possible, a heat sink is usually made of a metal with high thermal conductivity (such as aluminum, aluminum alloy, copper). However, the heat dissipation device has conductivity, and in many cases, it is necessary to add a layer of insulating plastic sheet (such as...

Claims

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Application Information

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IPC IPC(8): B29B9/00B29C48/395C08K3/22C08L23/12
Inventor 林志丹麦堪成
Owner SUN YAT SEN UNIV
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