Foaming body and preparation method thereof

A foam and low-foaming technology, applied in the field of foam and its preparation, can solve the problems of low foaming ratio, high density, high cost, etc., achieve high flame-retardant grade, and increase the effect of foaming ratio

Active Publication Date: 2012-05-23
SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the foam expansion ratio of the above-mentioned olefin resin and olefin thermoplastic elastomer high flame-retardant foam is only 10-20 times, the expansion ratio is low, the density is high, and the cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] The invention provides a method for preparing a foam, comprising:

[0047] Step 1, extruding the low-foaming material to form low-foaming granules, and extruding the high-foaming material to form high-foaming granules;

[0048] Step 2, the low-foaming particles described in step 1 enter the processing equipment through the low-foaming material inlet of the processing equipment (such as an extruder), and the heating temperature of the processing equipment is 120-200 ° C;

[0049] Step 3, when the low-foaming particles are heated in the processing equipment to form a molten state, the high-foaming particles are added into the processing equipment through the high-foaming material inlet of the processing equipment, and heated to 160-260°C;

[0050] Step 4, because the melting point of the high-foaming material is higher than that of the low-foaming material, the high-foaming particles do not melt in the melting temperature range of the low-foaming material, but are blended...

Embodiment approach 1

[0058] Embodiment 1: Take 100 parts of low-density polyethylene, 10 parts of expanded graphite, 1 part of red phosphorus, 1 part of aluminum hydroxide, 10 parts of foaming agent ADCA (alias AC, ADC) and 0.8 parts of zinc oxide from the low-foaming material , 0.6 part of antioxidant (1010); 200 parts of high-density polyethylene and 80 parts of foaming agent ADCA are taken from the high-foaming material, and the foam is obtained according to the preparation method of the above-mentioned foam.

Embodiment approach 2

[0059] Embodiment 2: Take 100 parts of low-density polyethylene, 10 parts of expanded graphite, 1 part of red phosphorus, 1 part of aluminum hydroxide, 10 parts of foaming agent ADCA, 0.8 parts of zinc oxide, and an antioxidant (1010) from the low-foaming material 0.6 part; 200 parts of high-density polyethylene, 5 parts of expanded graphite, 3 parts of red phosphorus, 2 parts of aluminum hydroxide, and 80 parts of foaming agent ADCA are taken from the high-foaming material, and the foam is prepared according to the preparation method of the above-mentioned foam .

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Abstract

The invention provides a foaming body, which is a heteropical mixture formed by a high foaming material and a low foaming material, wherein the low foaming material comprises 100 parts of a matrix resin, 10-30 parts of a foaming agent and 10-100 parts of a flame retardant body; the high foaming material comprises 46-380 parts of a matrix resin and 5-160 parts of a foaming agent; and the melting point of the matrix resin in the high foaming material is higher than that of the matrix resin in the low foaming material. In the invention, the foaming body comprises the high foaming material and the low foaming material, the high foaming material is dispersed into the low foaming material in the form of small particles, and high foaming particles are foamed at a high foaming rate while the low foaming material is foamed at a relatively low foaming rate during expansion foaming of the foaming body, so that the overall foaming rate of the foaming body can be increased.

Description

technical field [0001] The invention relates to a foam and a preparation method thereof, in particular to a foam with high foam expansion ratio, low density and low production cost and a preparation method thereof. Background technique [0002] Chinese Invention Publication No. CN1786065A discloses an olefin resin and olefin thermoplastic elastomer high flame-retardant foam and its manufacturing method. The components and proportions are as follows: 10-100 parts of halogen-free flame retardant, 100 parts of matrix resin , 10-30 parts of foaming agent, 0.1-1 part of cross-linking agent or 20-60 kGy of radiation. [0003] However, the foam expansion ratio of the above-mentioned olefin resin and olefin thermoplastic elastomer high flame-retardant foam is only 10-20 times, the expansion ratio is low, the density is high, and the cost is high. [0004] Therefore, there is an urgent need for a foam with high expansion ratio, low density and low production cost. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/16C08L53/00C08L23/14C08L7/00C08J9/35C08J9/04B29C44/60
Inventor 周和平康树峰邢福发张定雄田立张增果
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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