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Polypropylene resin used for manufacturing medical infusion bottle by injection stretch blow moulding

A polypropylene resin, injection stretch blowing technology, applied in the field of polypropylene resin, can solve the problem of unsatisfactory anti-oxidation performance

Active Publication Date: 2010-06-09
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the general polypropylene resin raw materials used to manufacture medical infusion bottles usually do not carry out targeted adjustments to antioxidant additives due to changes in the manufacturing process, so when used in the injection stretch blowing process, the anti-oxidant additives appear. Defects of unsatisfactory oxygen performance

Method used

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Examples

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Effect test

Embodiment 1～6

[0019] The polypropylene resin is a composition, and the components include a resin base material, an acid neutralizer and an antioxidant, and are formed by melting and mixing. The resin base material is a random copolymer of propylene and ethylene, and its ethylene content is 0.5-4 wt%. The melting temperature of the resin base material is 140-165° C., and the melt flow rate is 7.0 g / 10 min.

[0020] The acid neutralizer is calcium stearate and hydrogenated talcum powder in the same weight portion; the antioxidant is a mixture of hindered phenolic antioxidant A and phosphite antioxidant B, wherein antioxidant A is 1,1 , 3-three (2-methyl-4-hydroxyl-5-tert-butylphenyl) butane, the specific antioxidant B of each embodiment and the proportioning of antioxidant A, B are shown in Table 1, resin base See Table 2 for the proportioning of feed, antioxidant total amount and acid neutralizer total amount.

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Abstract

A polypropylene resin used for manufacturing medical infusion bottle by injection stretch blow moulding is composition, comprises the components of resin matrix, acid-acceptor and antioxidant and is formed by melting and mixing. The resin matrix is propene ethane random copolymer, melting temperature is 140-165 DEG C, and melt flowing speed is 5.0-10.0g / 10min. The antioxidant is mixture of hindered phenol type antioxidant and phosphite ester type antioxidant, and the weight ratio of the two is 1: 0.3-10.0. The hindered phenol type antioxidant is 1, 1, 3-tri(2-methyl-4-hydroxy-5-tert-butyl phenyl) butane; and the phosphite ester type antioxidant is tri(2, 4-ditertiary butyl phenyl) phosphite ester or bis(2, 4-di-tert-butyl phenyl) pentaerythritol phosphite ester. Resin has more continuous and stable oxidation resistant capability and is applicable to injection stretch blow moulding bottle-making process.

Description

technical field [0001] The invention relates to a polypropylene resin, in particular to a polypropylene resin specially used for manufacturing medical infusion bottles. Background technique [0002] At present, the raw materials for the manufacture of plastic medical infusion bottles basically use special polypropylene resin, which is a propylene-ethylene random copolymer with an ethylene content of less than 10 wt%. In terms of properties such as heat resistance, strength, toughness and transparency, it has obvious advantages compared with high polymer materials such as polyvinyl chloride used in the early stage, typically as described in US Patent US5,286,540 and Chinese Patent Application 200410017402.9 of. On the other hand, the bottle-making process of medical infusion bottles is mostly changed from the direct extrusion blow process to the injection stretch blow process, that is, the raw materials are first made into preforms by injection molding, and then blow molded ...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K5/13C08K5/526B29B9/00
Inventor 郭晓军黄伟东周浩
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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