A kind of pull-tab outer cover material for infusion bottle or bag and preparation method thereof

Abstract

The invention discloses a pull-tab outer cover material used for infusion bottles or bags, and the material provided by the invention comprises the following components in parts by weight: 71-89 parts of polypropylene, 1-9 parts of flexibilizer, 9-25 parts of lubrication resin and 0.01-0.4 part of radiation-resistant accessory ingredient. The melting index of the pull-tab outer cover material used for infusion bottles or bags is 9-60g / min under the condition of 230DEG C and 2160g, and the outer cover material can be directly injected to prepare the pull-tab outer cover material used for infusion bottles or bags. A cover body and the infusion bottles or bags have high welding strength, a pull tab is easy to open, an opening edge is tidy, and the opening force is less than or equal to 60N; the pull tab has small possibility of being ruptured, and the fracture rate of the pull tab is less than or equal to 1%; no low-molecule ingredients are separated out, the size stability is good, and the size change rate of the outer cover is less than or equal to 0.5% before and after disinfection; and the radiation-resistant performance is good, the yellow index is less than or equal to 7 after the material is radiated by 60Co-gamma ray of 25kGy dose, and the material haze is less than or equal to 20.

Description

technical field [0001] The invention relates to a material for an infusion bottle or a bag, in particular to a modified polypropylene pull-tab outer cover material for an infusion bottle or a bag and a preparation method thereof, belonging to the technical field of medical polymer materials. Background technique [0002] In recent years, my country's large infusion plastic packaging industry has developed rapidly. From 2007 to 2009, the market share of medical infusion plastic packaging products increased from 34% to 56%, and plastic packaging is increasing year by year with a market share of more than 10% per year, replacing traditional glass bottle packaging and becoming my country's large infusion solution. Pharmaceutical packaging market key development trends. [0003] Plastic large infusion packaging includes two types of infusion bottle and infusion soft bag. The infusion bottle is composed of a bottle body, inner and outer covers and rubber pads, and the infusion sof...

AI Technical Summary

Problems solved by technology

On the basis of the inventor's research on the inner cover of the infusion bottle or bag (application number 201010117138.1), further research is carried out on the pull-tab outer cover of the infusion bottle or bag to solve the problem of the existence of the pull-tab outer cover of the infusion bottle or bag. The following problems: (1) The opening force of the pull ring is large, it is not easy to pull open, and the edge is not neat after opening; (2) The toughness of the pull ring is insufficient, and the pull ring is easy to break; (3) Low molecular components are separated out, causing the outer cover Dimensional stability is poor, and the deformation is obvious after high-temperature disinfection. (4) The outer cover is not resistant to radiation, and the yellowing is obvious after radiation disinfection

[0004] The Chinese invention patent with the application number of 200410024446.4 discloses a cap material for infusion bottles prepared by adding polyethylene (PE), polyolefin elastomer (POE) and KN resin to polypropylene resin (PP), so as to improve the compatibility between the cap and polypropylene. The welding performance of the bottle body is not good, the pull ring connection is easy to crack, and it is not easy to open the problem

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