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Foaming material prepared by blending plant straw filled polypropylene/polyethylene and preparation process

A technology of plant straw and foaming material, applied in the field of foaming material

Inactive Publication Date: 2012-03-28
陆希悦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the crystallization characteristics of PP, its processing and molding are more difficult.
As the processing temperature increases, the viscosity of PP resin drops sharply, and the gas decomposed by the blowing agent is difficult to maintain in the resin, which makes it difficult to control the foaming; due to the release of more heat during crystallization, the melt strength decreases and foaming occurs. Bubbles are easily destroyed after foaming, so it is difficult to obtain a foam with high independent cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Polypropylene plastic 60 parts,

[0045] Polyethylene matrix 40 parts,

[0046] Foaming agent 1 part,

[0047] Plant straw powder 50 parts,

[0048] 1 part of coupling agent,

[0049] Heat stabilizer 5 parts,

[0050] Lubricant 0.5 parts.

[0051] Wherein, in this example, the foaming agent is azodicarbonamide; the plant straw powder is sawdust and bamboo powder, and the plant straw is recycled and crushed and passed through a 250-500um aperture sieve, and dried until the moisture content is less than 3%. The plant straw powder is obtained; the coupling agent is an alkane-silicon coupling agent; the heat stabilizer is a composite lead salt heat stabilizer; and the lubricant is polyester wax.

[0052] The preparation method is:

[0053] (1) Plant straw powder is obtained by recycling and crushing the plant straw, passing through a 250-500um aperture sieve, and drying until the moisture content is less than 3%, and then treating the plant straw powder with a couplin...

Embodiment 2

[0059] Polypropylene plastic 70 parts,

[0060] Polyethylene matrix 30 parts,

[0061] Foaming agent 4 parts,

[0062] Plant straw powder 45 parts,

[0063] 1.5 parts of coupling agent,

[0064] 4 parts heat stabilizer,

[0065] Lubricant 0.7 parts.

[0066] Among them, in this example, the foaming agent is 4,4'-oxobisbenzenesulfonyl hydrazide; the plant straw powder is rice husk, and the plant straw is recovered and crushed and passed through a 250-500um aperture sieve, and dried to the moisture content If the content is less than 3%, plant straw powder is obtained; the coupling agent is an aluminate coupling agent; the heat stabilizer is a composite lead salt heat stabilizer; the lubricant is polyethylene wax.

[0067] The preparation method is:

[0068] (1) Plant straw powder is obtained by recycling and crushing the plant straw, passing through a 250-500um aperture sieve, and drying until the moisture content is less than 3%, and then treating the plant straw powder ...

Embodiment 3

[0074] Polypropylene plastic 80 parts,

[0075] Polyethylene matrix 20 parts,

[0076] Foaming agent 5 parts,

[0077] Plant straw powder 40 parts,

[0078] 2 parts of coupling agent,

[0079] 3 parts heat stabilizer,

[0080] Lubricant 1 part.

[0081] Among them, in this example, the foaming agent is 4,4'-oxobisbenzenesulfonyl hydrazide, and the plant straw powder is the straw, and the plant straw is recovered and crushed and passed through a 250-500um aperture sieve, and dried to the moisture content less than 3%, to get plant straw powder; the coupling agent is a titanate coupling agent; the heat stabilizer is a composite lead salt heat stabilizer; the lubricant is industrial paraffin and glycerin.

[0082] The preparation method is:

[0083] (1) Plant straw powder is obtained by recycling and crushing the plant straw, passing through a 250-500um aperture sieve, and drying until the moisture content is less than 3%, and then treating the plant straw powder with a cou...

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Abstract

The invention provides a foaming material prepared by blending plant straw filled polypropylene / polyethylene. The foaming material comprises the following raw materials in parts by weight: 60-80 parts of polypropylene plastic, 20-40 parts of polyethylene substrate, 1-5 parts of foaming agent, 40-50 parts of plant straw powder, 1-2 parts of coupling agent, 3-5 parts of heat stabilizer and 0.5-1 part of lubricating agent. The preparation process comprises the following steps: preparing the plant straw powder, and then treating the plant straw powder with the coupling agent; evenly mixing the polypropylene plastic, the polyethylene substrate, the foaming agent, the plant straw powder treated by the coupling agent, the heat stabilizer and the lubricating agent; carrying out fusion blending and pelleting on the mixture, and carrying out extrusion molding; and finally, heating the sectional material, adding the foaming agent for mixing, extruding and foaming in an extrusion machine, and cooling to obtain the product, wherein the temperature of the extrusion machine is controlled between 180 DEG C and 200 DEG C. The product prepared by the process in the invention has better bubble form,foaming density and density of the foaming material as compared with the other foaming materials; and simultaneously, the product has excellent impact strength and physical and mechanical properties.

Description

technical field [0001] The invention relates to a foaming material, in particular to a foaming material made of plant straw filled polypropylene / polyethylene blend and a preparation process thereof. Background technique [0002] At present, a large amount of straw produced by agricultural production is first crushed and returned to the field as fertilizer, but the long-term use of this treatment method will increase the possibility of crop diseases, and its utilization value is also low; second, it is used as fuel. The value is greatly reduced, and some are treated as waste, such as incineration, which not only causes waste of resources, but also pollutes the environment. [0003] In recent years, the production and development of foamed PP has become a research hotspot. However, due to the crystallization characteristics of PP, its processing and molding are more difficult. As the processing temperature increases, the viscosity of PP resin drops sharply, and the gas deco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L97/02C08J9/10B29C47/92B29C48/92
CPCB29C48/92
Inventor 顾丹
Owner 陆希悦
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