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PP foaming composite additive

A technology of composite additives and foaming agents, applied in the field of PP extrusion foaming, can solve problems such as difficulty in obtaining ideal foamed products, excessive degradation, etc.

Inactive Publication Date: 2012-01-11
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a PP foaming compound additive, which effectively solves the problem that it is difficult to obtain ideal foamed products due to the problem of excessive degradation in the PP foaming process

Method used

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Embodiment 1

[0023] A PP foaming composite additive of the present invention is specifically prepared from the following raw materials in parts by weight:

[0024]

[0025] The PP foaming composite additive of the specific formula above is preferably used in foamed polypropylene lunch boxes, and its production method is as follows: mix the PP foaming composite additive of the above formula with homopolymerized or copolymerized polypropylene in a ratio of 30:70 Evenly, extrude and foam into a foam sheet in an extruder, and then use a blister shaping process to produce a correspondingly shaped lunch box.

Embodiment 2

[0027] A PP foaming composite additive of the present invention is specifically prepared from the following raw materials in parts by weight:

[0028]

[0029] The PP foaming composite additive of the specific formula above is preferably used for luggage liners, and its production method is as follows: mix the PP foaming composite additive of the above formula with homopolymerized or copolymerized polypropylene in a ratio of 30:70, and then The extruder extrudes and foams into a foam sheet, and then cuts it into the corresponding size of the luggage liner.

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Abstract

The invention discloses a PP foaming composite additive, which comprises the following raw materials by weight: 10-30 parts of LLDPE, 10-30 parts of EPDM, 80-40 parts of POE, 3-6 parts of foaming agent, 0.2-1.0 part of cross-linking agent, 1-2 parts of TMPTMA, 0.2-1.0 part of nano zinc oxide; PP enables a rapid degradation while crosslinking foaming, the TMPTMA is taken as a crosslinking auxiliary agent which effectively increases the crosslinking speed, meanwhile, a reactivity reaction is generated between the crosslinking and degrading of PP, and the crosslinking speed is greater than degradation speed. The speed for decreasing the PP melt-strength is alleviated which is beneficial to ideal foaming of PP, in addition, bubble strength and uniformity can be increased by adding nano zinc oxide, and the reaction process can be accelerated, the crosslinking temperature of the cross-linking agent can be reduced, the heat transfer and the crosslinking degree can be increased, the composite additive is benefit for harmless degradation, recovery and treatment of waste PP foaming plastics.

Description

technical field [0001] The invention belongs to the field of PP (polypropylene) extrusion foaming, in particular to a foaming composite additive for PP foaming. Background technique [0002] PP (polypropylene) material, one of the five main plastics, has the characteristics of environmental protection, good chemical stability, and high cost performance. It has become the preferred material to replace other plastics and is widely used in the creation of various household appliances, tableware, etc Utensils; In recent years, the development of PP foaming has become a focus of domestic research on PP materials. The current method of PP foaming is to add a foaming agent to the PP substrate, and through the foaming and cross-linking process, the foaming agent generates gas. Foaming is carried out to finally make PP foamed products. However, in the prior art, it is difficult to obtain ideal PP foamed products. One of the important reasons is the degradation problem in the process ...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/16C08L23/12C08K3/22C08K5/14C08K5/103C08J9/10
Inventor 许绿丝李贝
Owner HUAQIAO UNIVERSITY
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