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Novel foaming formula of polypropylene plastic

A polypropylene plastic and formula technology, which is applied in the field of plastic foaming formula, can solve the problems of insufficient gas generation, inability to discharge all decomposed products, product pollution, and yellow surface.

Inactive Publication Date: 2013-01-23
SHANGHAI SHENGGUANG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The new foaming formula of polypropylene plastic generally uses a single foaming agent. After stirring and injection molding, the plastic product forms intermediate air holes, so as to improve the strength and solve the problem of miniature. A separate white foaming agent (N1000, sodium polycarbonate ) is foamed with raw materials, the amount of gas generated is insufficient, and the weight after foaming is too heavy to meet the expected requirements
However, if a separate yellow (AC, azodicarbonamide) foaming agent is used to foam with raw materials, although the amount of gas generated is relatively sufficient, the surface after foaming is yellow, which is unacceptable to customers, and its decomposition products cannot be completely discharged, which will cause damage to the product. Pollution

Method used

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  • Novel foaming formula of polypropylene plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 90 kg of polypropylene plastic, 5 kg of AC, and 5 kg of N1000. Stir until uniform, then send the prepared material to the single-screw mixer for granulation, the granulation temperature is 170°C, and then put the prepared granules into the injection molding machine for injection molding. The injection molding processing temperature range of the new polypropylene plastic formula is 180°C.

Embodiment 2

[0019] Take 96 kg of polypropylene plastic, 2 kg of AC, and 2 kg of N1000. Stir until uniform, then send the prepared material to the single-screw extruder for granulation, the granulation temperature is 180°C, and then put the prepared granules into the injection molding machine for injection molding. The processing temperature range of PP injection molding is 190°C.

Embodiment 3

[0021] Take 99 kg of polypropylene plastic, 0.3 kg of AC, and 0.3 kg of N1000. Stir until uniform, then send the prepared material to a single-screw mixer for granulation, the granulation temperature is 200°C, and then put the prepared granules into the injection molding machine for injection molding. The processing temperature range of PP injection molding is 250°C.

[0022] When stirring, it should be prepared under (1) normal temperature and normal pressure, and (2) clean the mixing tank before stirring and discharging.

[0023] The granulation problem is not easy to be too high,

[0024] Comparison of injection molding process effect before and after foaming formula of polypropylene plastic:

[0025]

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Abstract

The present invention relates to a plastic foaming formula, particularly a novel foaming formula of polypropylene plastic. The foaming formula is characterized by including the following components: by weight, 85%-99.8% of polypropylene plastic, 0.1%-10% of an AC foaming agent, and 0.1%-10% of an N1000 foaming agent. The foaming formula is characterized by including 90% of the polypropylene plastic, 5% of the AC foaming agent, and 5% of the N1000 foaming agent. The main ingredients of the AC foaming agent include azodicarbonamide, a small amount of biurea and calcium carbonate. The AC foaming agent is a commercial product produced by Jiangsu SOPO Chemical Company. The main ingredients of the N1000 foaming agent include poly sodium bicarbonate, a small amount of sodium carbonate and sodium chloride. The N1000 foaming agent is a commercial product produced by Guangzhou Huike Chemical Co., Ltd. The foaming formula has the advantage of stable foaming, no obvious contraction in appearance, light weight, high strength, etc.

Description

technical field [0001] The invention relates to a plastic foaming formula, in particular to a new foaming formula of polypropylene plastic. Background technique [0002] The new foaming formula of polypropylene plastic generally uses a single foaming agent. After stirring and injection molding, the plastic product forms intermediate air holes, so as to improve the strength and solve the problem of miniature. A separate white foaming agent (N1000, sodium polycarbonate ) is foamed with raw materials, the amount of gas generated is insufficient, and the weight after foaming is too heavy to meet the expected requirements. However, if a separate yellow (AC, azodicarbonamide) foaming agent is used to foam with raw materials, although the amount of gas generated is relatively sufficient, the surface after foaming is yellow, which is unacceptable to customers, and its decomposition products cannot be completely discharged, which will cause damage to the product. pollute. In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08J9/10C08J9/08
Inventor 刘国富赵忠伟
Owner SHANGHAI SHENGGUANG SCI & TECH
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