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Foamed polypropylene material

A foaming polypropylene and foaming agent technology, which is applied in the field of medical PP modified materials, can solve problems such as environmental pollution and consumption of polypropylene raw materials, and achieve the effects of cost reduction, environmental protection, and easy molding

Active Publication Date: 2013-05-15
CHENGDU XINJIN SHIFENG MEDICAL APP ANDINSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The core rod of the syringe does not touch the liquid medicine, and the requirements for PP are relatively low. However, the core rods of the syringes on the market are all made of ordinary polypropylene injection molding, and they are treated as medical waste for incineration after use.
It not only consumes a large amount of polypropylene raw materials, but also causes certain pollution to the environment.

Method used

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  • Foamed polypropylene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.8 kg of azodicarbonamide with a particle size of 4 μm and 0.5 kg of zinc oxide, mix them evenly, and grind them into a fine powder passing through a 100-mesh sieve, which is the modified foaming agent.

[0029] Add 80kg of PP: T30S, 5kgPE, 0.2kg of talc powder with a particle size of 5000 mesh, 0.2kg of dicumyl peroxide, 0.5kg of divinylbenzene and the modified foaming agent obtained in the previous steps into a high mixing pot and mix 10 minutes, the rotating speed is 600 r / min. Mix evenly to obtain the foamed polypropylene material of the present invention.

Embodiment 2

[0031] Weigh 1.2 kg of azodicarbonamide with a particle size of 4 μm and 0.8 kg of zinc oxide, mix them evenly, and grind them into a fine powder passing through a 100-mesh sieve, which is the modified foaming agent.

[0032] Add 88kg of PP: T30S, 13kgPE, 0.35kg of talc powder with a particle size of 5000 mesh, 0.5kg of dicumyl peroxide, 0.8kg of divinylbenzene and the modified foaming agent obtained in the previous steps into a high mixing pot and mix 10 minutes, the rotating speed is 600 r / min. Mix evenly to obtain the foamed polypropylene material of the present invention.

Embodiment 3

[0034] Weigh 1.5 kg of azodicarbonamide with a particle size of 4 μm and 1 kg of zinc oxide, mix them evenly, and grind them into a fine powder passing through a 100-mesh sieve, that is, the modified foaming agent.

[0035] Add 95kg of PP: T30S, 20kgPE, 0.5kg of talc powder with a particle size of 5000 mesh, 0.8kg of dicumyl peroxide, 1.2kg of divinylbenzene and the modified foaming agent obtained in the previous steps into the high mixing pot Mix for 10 minutes at a speed of 600 r / min. Mix evenly to obtain the foamed polypropylene material of the present invention.

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Abstract

The invention provides a foamed polypropylene (PP) material which is prepared from the following components in parts by weight: 80-95 parts of PP:T30S, 5-20 parts of polyethylene (PE), 0.8-1.5 parts of foaming agent, 0.5-1 part of foaming aid, 0.2-0.8 part of cross-linking agent, 0.2-0.5 part of nucleating agent and 0.5-1.2 parts of assistant cross-linking agent. In the foamed PP material provided by the invention, the cost can be lowered because of the addition of the PE, the consumption of the PP is greatly reduced at the same volume of a syringe core rod, and the foamed PP material has theadvantages of easy shaping, uniform product foaming, good mechanical strength and the like and is favorable for lowering the cost and protecting the environment.

Description

technical field [0001] The invention relates to the field of medical PP modified materials, in particular to a PP modified material for a syringe core rod. Background technique [0002] my country is a big producer of disposable syringes, about 13 billion a year, and consumes a large amount of polypropylene (PP) raw materials every year. Now that oil resources are getting tighter and tighter, how to save the use of materials has become an urgent problem for many manufacturers. question. The density of the microporous foamed polymer material is reduced by 5% to 98% compared with that before foaming, a new type of thermoplastic polymer material. It has excellent properties such as low density, high impact strength, specific strength, fatigue resistance and thermal stability. The core rod of the syringe does not touch the liquid medicine, and the requirements for PP are relatively low. However, the core rods of the syringes on the market are all made of ordinary polypropylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08K5/14C08K3/34C08K5/01C08J9/10
Inventor 张晓李静杨晓龙周伟李显明
Owner CHENGDU XINJIN SHIFENG MEDICAL APP ANDINSTR CO LTD