A method for improving the gas-barrier property of pharmaceutical plastic containers

Abstract

The invention belongs to the technical field of medicinal plastic containers and particularly relates to a method for increasing the airtightness of a medicinal plastic container. The method includes:adding mixing auxiliaries with the weight being 2-6% of the weight of a polyethylene raw material into the polyethylene raw material, and sufficiently mixing, wherein the polyethylene raw material comprises polyethylene with the molecular weight being 0.1-0.3 million, polyethylene with the molecular weight being 0.05-0.1 million, polyethylene with the molecular weight being 0.3-0.5 million and polyethylene with the modified molecular weight being 3-6 million. Compared with the prior art, the method has the advantages that dielectric barrier discharge is utilized to modify the ultrahigh-molecular-weight polyethylene material, the modified material is mixed with other raw materials to prepare the plastic container, material compatibility can be enhanced, the high-temperature resistance andairtightness of the material can be increased effectively, and medicine pollution during long-term use of the container can be avoided; the method is simple in process, easy in condition control, capable of reducing the decomposition of additives and capable of expanding the application range of the polyethylene material.

Description

technical field [0001] The invention belongs to the technical field of medicinal plastic containers, and in particular relates to a method for improving the gas barrier properties of medicinal plastic containers. Background technique [0002] In the prior art, there are many types of plastic packaging containers, among which, the plastic containers used for packaging medicines should meet the requirements of not polluting medicines, low cost, durable, with certain strength, toughness, and good aging resistance. The raw materials used for plastic packaging containers for medicines mainly include polyethylene plastics, polyvinyl chloride, etc., because polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can withstand general requirements Most of the acid-base corrosion, insoluble in common solvents at room temperature, low water absorption, excellent electrical insulation, therefore, has been widely used i...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, there are many types of plastic packaging containers, among which, the plastic containers used for packaging medicines should meet the requirements of not polluting medicines, low cost, durable, with certain strength, toughness, and good aging resistance. The raw materials used for plastic packaging containers for medicines mainly include polyethylene plastics, polyvinyl chloride, etc., because polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance, good chemical stability, and can withstand general requirements Most of the acid-base corrosion, insoluble in common solvents at room temperature, low water absorption, excellent electrical insulation, therefore, has been widely used in the production of packaging containers; but the existing raw materials for the production of plastic containers are basically selected Polyethylene with a single molecular weight and a single molecular density was found to be unable to meet the requirements for high temperature resistance and gas barrier performance during the long-term storage of drugs