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Medical polypropylene material

A polypropylene material, homopolypropylene technology, applied in the field of polypropylene (PP) modification, can solve the problems of poor transparency, large influence of injection molding machine, increased injection pressure, etc., and achieves good low temperature toughness and high fluidity. , the effect of increased transparency

Active Publication Date: 2012-01-11
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

But polypropylene also has obvious disadvantages: not very good transparency, low fluidity, poor low temperature toughness, and easy to generate static electricity during processing, etc.
Many fluidity problems are solved by increasing the injection pressure, which will have a great impact on the injection molding machine in the long run

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 100kg of homopolypropylene resin, 0.5kg of cooling masterbatch J1010, 0.2kg of bis(3,4 dimethylbenzylidene) sorbitol, 5kg of POE, 0.5kg of hydroxyethyl fatty amine, 0.50kg of EBS, anti The oxygen agent 1010 is 0.07 kg, and the antioxidant 168 is 0.14 kg. Mix the above-mentioned ingredients weighed in a high-speed mixer for 3 to 5 minutes to fully disperse the ingredients to obtain a mixture; mix the mixture Put it in a parallel twin-screw extruder for melt extrusion and pelletizing; the extrusion process conditions of the parallel twin-screw extruder are: 190°C in the first zone, 210°C in the second zone, 210°C in the third zone, and 195°C in the fourth zone. The speed is 420r / min, the feeding speed is 220r / min, and water-cooled pelletizing is adopted.

Embodiment 2

[0018] Weigh 100kg of homopolypropylene resin, 1.2kg of cooling masterbatch J1010, 0.25kg of bis(3,4-dimethylbenzylidene) sorbitol, 0.8kg of POE, 0.8kg of hydroxyethyl fatty amine, 0.8kg of EBS, anti Oxygen 1010 is 0.1 kg, antioxidant 168 is 0.2 kg, and then the medical polypropylene material is prepared according to the preparation method described in Example 1.

Embodiment 3

[0020] Weigh 100kg of homopolypropylene resin, 2kg of cooling masterbatch J1010, 0.3kg of bis(3,4-dimethylbenzylidene) sorbitol, 10kg of POE, 1kg of hydroxyethyl fatty amine, 1kg of EBS, and 1010 of antioxidant 0.15 kg, antioxidant 168 is 0.3kg, then according to the preparation method described in Example 1, the medical polypropylene material is obtained.

[0021] The product prepared by the present invention was compared with several commonly used products in corresponding experiments, and the following data were obtained (see Table 1).

[0022] Table 1 Material performance of the present invention and commonly used product material performance test data comparison table

[0023] Test items Materials of the invention K4912 M1600E R370Y transparency(%) 86-88 84.7 79.3 85.1 Izod impact strength (J / m) (20°C) 110-118 100 25 87 Izod impact strength (J / m) (-10°C) 30-42 17 7 15 Melt flow rate (g / 10min) 19-20 12 16±3 18

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PUM

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Abstract

The invention discloses a medical polypropylene material. The medical polypropylene material comprises: by weight, 100 parts of polypropylene resin, 0.5 to 2 parts of a cooling masterbatch, 0.2 to 0.3 parts of a transparent nucleating agent, 5 to 10 parts of a flexibilizer, 0.5 to 1 part of a high-molecular antistatic agent, 0.5 to 1 part of a lubricant ethylene bis-stearamide (EBS) and 0.2 to 0.5 parts of anti-oxidants. The polypropylene resin is a homopolymer. The high-molecular antistatic agent is hydroxyethyl fatty amine. The transparent nucleating agent is an alpha-crystal form nucleating agent. The flexibilizer is an ethane-octylene-propylene copolymer. The invention also provides a preparation method of the medical polypropylene material. The medical polypropylene material has the advantages of good toughness, especially, good low temperature toughness, good liquidity, high transparency and good antistatic effects. Therefore, the medical polypropylene material can be utilized for mass production of multi-cavity molds.

Description

technical field [0001] The invention relates to the field of polypropylene (PP) modification, in particular to a low-temperature-resistant, high-flow, toughened, transparent, and antistatic medical polypropylene material. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics. It has excellent mechanical properties, good heat resistance, good chemical stability, and excellent high-frequency insulation properties. However, polypropylene also has obvious disadvantages: poor transparency, low fluidity, poor low-temperature toughness, and static electricity during processing. Poor transparency makes the product look foggy and affects the appearance; when the product is molded on a large multi-cavity mold, the fluidity is not good, which will cause the PP material to fail to fill the cavity, and the product is defective; in cold places, the toughness of the PP product is poor, It is prone to breakage; due to the lack of polar groups in its m...

Claims

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Application Information

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IPC IPC(8): C08L23/12B29B9/06B29C47/92B29C48/92
Inventor 杨晓龙董合军张晓
Owner CHENGDU XINJIN SHIFENG MEDICAL APP ANDINSTR CO LTD
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