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Foamed material prepared from nano-calcium-carbonate-filled polypropylene/polyethylene blend and preparation process thereof

A technology of nano-scale calcium carbonate and foaming materials, applied in the field of foaming materials, can solve the problems of long cycle time and difficulty in large-scale production, achieve low cost, excellent impact strength and physical and mechanical properties, and improve the effect of melt strength

Inactive Publication Date: 2011-11-16
CHANGSHU JIANGSHUN PLASTIC PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1346843A discloses a kind of polypropylene resin for the preparation of radiation crosslinked polypropylene foaming material, which is a kind of special radiation-resistant polypropylene, and the blending temperature is as high as 160-200 ° C. Foaming takes a while, the cycle is long, and large-scale production is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 100 parts of polypropylene plastic, 10 parts of polyethylene matrix, 1 part of foaming agent, 1 part of nano calcium carbonate and 1 part of coupling agent. Mix the components of the polypropylene plastic, polyethylene matrix, nano-scale calcium carbonate and coupling agent uniformly according to the weight ratio; melt and blend the mixture at 160°C to form a material, extrude it with an extruder, and extrude The speed of the machine is 110-130 rpm; finally, heat the profile for 3 minutes, add foaming agent to mix, and foam at 185°C. The extruder extrudes and foams. The speed of the press is 110-130 rpm; the extruded foam is cooled to obtain a product.

Embodiment 2

[0026] 110 parts of polypropylene plastic, 13 parts of polyethylene matrix, 3 parts of foaming agent, 6 parts of nano calcium carbonate and 1.2 parts of coupling agent. Mix the components of the polypropylene plastic, polyethylene matrix, nano-scale calcium carbonate and coupling agent uniformly according to the weight ratio; melt and blend the mixture at 170°C to form a material, extrude it with an extruder, and extrude The speed of the machine is 110-130 rpm; finally, heat the profile for 7 minutes, add a foaming agent to mix, foam at 190 ° C, extrude the extruder to foam, control the temperature of the extruder at 170-200 ° C, The speed of the press is 110-130 rpm; the extruded foam is cooled to obtain a product.

Embodiment 3

[0028] 120 parts of polypropylene plastic, 15 parts of polyethylene matrix, 5 parts of foaming agent, 10 parts of nano calcium carbonate and 1.5 parts of coupling agent. Mix the components of the polypropylene plastic, polyethylene matrix, nano-scale calcium carbonate and coupling agent uniformly according to the weight ratio; melt and blend the mixture at 180°C to form a material, extrude it with an extruder, and extrude The speed of the machine is 110-130 rpm; finally, heat the profile for 10 minutes, add foaming agent to mix, and foam at 200 ° C, the extruder extrudes and foams, the temperature of the extruder is controlled at The speed of the press is 110-130 rpm; the extruded foam is cooled to obtain a product.

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Abstract

The invention provides a foamed material prepared from a nano-calcium-carbonate-filled polypropylene / polyethylene blend and a preparation process thereof. The foamed material comprises the following components in parts by weight: 100-120 parts of polypropylene plastic, 10-15 parts of polyethylene matrix, 1-5 parts of foaming agent, 1-10 parts of nano calcium carbonate and 1-1.5 parts of coupling agent. The preparation process comprises the following steps: firstly uniformly mixing polypropylene, the polyethylene matrix, nano calcium carbonate and the coupling agent in weight proportion; then carrying out melt blending and granulating on the mixture at the temperature of 160-180 DEG C, and carrying out extrusion molding by virtue of an extrusion machine; and finally heating the molded material for 3-10 minutes, adding the foaming agent, mixing, foaming at the temperature of 185-200 DEG C, extruding and foaming by virtue of the extrusion machine at the extrusion machine temperature of 170-200 DEG C and cooling the extruded foam to obtain a product. In the preparation method provided by the invention, the polypropylene / polyethylene blend is filled with nano calcium carbonate and has a better foam shape, foam density and foamed material density than other foamed materials, and simultaneously the obtained product has the advantages of 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 nano-scale calcium carbonate filled polypropylene / polyethylene blending and a preparation process. Background technique [0002] 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 decomposed by the foaming 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. After foaming, the cells are easily destroyed, so it is difficult to obtain a foam with high independent cells. [0003] Therefore, in the prior art, the melt strength of PP is usually increased by means of crosslinking, blending,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/08C08K3/26C08J9/10
Inventor 邱玉珍
Owner CHANGSHU JIANGSHUN PLASTIC PROD
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