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Extrusion process and apparatus for producing foamed polyolefin product

A technology of olefin polymer and extrusion method, which is applied in the field of devices for manufacturing foamed polyethylene or polypropylene products, and can solve the problems of small thickness of foamed products and unsatisfactory

Active Publication Date: 2010-06-02
GUANGDONG BENDI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the small thickness of the produced foamed products, it cannot meet the needs of the current packaging field

Method used

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  • Extrusion process and apparatus for producing foamed polyolefin product
  • Extrusion process and apparatus for producing foamed polyolefin product
  • Extrusion process and apparatus for producing foamed polyolefin product

Examples

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Effect test

no. 1 Embodiment

[0023] In the first specific embodiment of the production method of the present invention, at first the polyethylene plastic (melt index is 2) and the 2000 mesh talc powder nucleating agent added in an amount of 1.5% are mixed uniformly in the high-speed mixer 1 and then dropped into plastic foaming In the extruder 2, the plastic foaming extruder is a two-stage extrusion system, the first stage is a twin-screw extruder with a diameter of 60mm, and the diameter of the second-stage screw is 150mm, and the material passes through the first-stage twin-screw extruder The extruder is heated, and its temperature is controlled above the melting temperature of polyethylene plastic. Barrel heating temperatures are 120°C, 150°C, 180°C, 180°C respectively. Under the joint action of twin-screw shearing and extrusion, the molten material is plasticized. After the material is completely melted, the quantitative pump 3 is used to add the anti-shrinkage agent, and the addition is 3.5%; the qua...

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Abstract

The present invention relates to extrusion process and apparatus for producing foamed polyethylene and polypropylene with physical foaming agent. The apparatus includes a high speed mixer, an extruder, a metering pump for feeding the extruder and a towing and cutting device connected to the extruder. The process includes mixing the polymer and the nucleator in the high speed mixer, heating and shearing the mixture in the plastic foaming extruder to form molten material, adding foaming agent and shrinkage resisting agent with the metering pump and mixing with the molten material, extruding themixture, cooling and cutting.

Description

technical field [0001] The invention relates to a device and method for manufacturing foamed olefin polymer products, in particular to a device and method for manufacturing foamed polyethylene or polypropylene products by extrusion method and physical foaming agent. Background technique [0002] (High) foamed polyethylene is a product made of polyethylene (PE) as the main raw material, adding foaming agent and other processing aids through extrusion processing. Foam products are foamed plastics in which the gas is evenly distributed in the material, so they have the characteristics of high specific strength, light weight, sound absorption, shockproof, etc., and are widely used in the packaging of household appliances, furniture, mechanical parts, electronic instruments, and precision instruments. Due to the high-foaming, closed-cell foam characteristics of high-expansion polyethylene, it has excellent water resistance, heat insulation and good buoyancy. Compared with the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/14B29C47/90B29C47/36B29C47/12B29C47/92C08K5/09C08K3/36C08K3/26C08K3/04C08K3/08C08K5/02B29K23/00B29C48/30B29C48/305B29C48/385B29C48/90B29C48/92
CPCB29C47/366B29B7/487B29C47/0042B29B7/823B29C47/0066B29B7/885B29B7/72B29C48/0012B29C48/0022B29C48/385
Inventor 冯云平
Owner GUANGDONG BENDI NEW MATERIAL TECH