Medical polyvinyl chloride (PVC) material for gamma-ray irradiation disinfection and preparation method thereof

Abstract

The invention relates to a medical polyvinyl chloride (PVC) material for gamma-ray irradiation disinfection and a preparation method thereof. The medical PVC material comprises 100 parts of PVC resin, 40 to 70 parts of a plasticizer dioctyl phthalate (DOP), 1.0 to 1.5 parts of a calcium/zinc heat stabilizer, 5 to 8 parts of an auxiliary heat stabilizer, 0.3 to 0.5 parts of a yellowing inhibitor, 0.1 to 0.5 parts of an anti-oxidant and 0.5 to 0.8 parts of a lubricant, wherein the PVC resin is a suspension PVC resin having a polymerization degree of 2500 to 3000; the calcium/zinc heat stabilizer is a complex composed of 50 to 60% of ricinic acid calcium, 10 to 15% of zinc octanoate, 10 to 15% of zine stearate and 10 to 25% of sorbierite; the auxiliary heat stabilizer is epoxidized linseed oil; the lubricant is composed of 40 to 60% of stearic acid and 40 to 60% of polyethylene wax; the yellowing inhibitor is octadecyl-dibenzoylmethane; and the anti-oxidant is an anti-oxidant 1076 produced by the Ciba specialty chemicals Ltd. The medical PVC material solves the problems that after being subjected to irradiation disinfection, the existing PVC material yellows because of degradation breaking of PVC macromolecules; mechanical properties are reduced; and ageing is accelerated. The preparation method of the medical PVC material can obviously improve a PVC material anti-irradiation capability.

Description

technical field [0001] The invention relates to a modification technology of a medical PVC material, in particular to a medical PVC material suitable for gamma ray irradiation disinfection and a preparation method thereof. Background technique [0002] Medical PVC pellets are one of the main raw materials widely used in disposable medical devices at home and abroad. Due to the advantages of good comprehensive performance and superior cost performance, it has been more and more widely used in the field of medical equipment. At present, the vast majority of disinfection and sterilization methods for domestic medical PVC instruments use ethylene oxide sterilization. Although the ethylene oxide sterilization method has the advantages of simple operation, broad spectrum, and strong sterilizing power, ethylene oxide is also a central nervous system depressant, stimulant, and protoplasmic poison, which is highly toxic to the human body. Side effects, so after ethylene oxide steri...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a medical PVC material suitable for γ-ray irradiation disinfection and its preparation method, mainly to solve the problem that the existing medical PVC material will turn yellow due to the degradation and fracture of PVC macromolecules after irradiation disinfection, The decline of mechanical properties and accelerated aging cannot meet the requirements of use. It can significantly improve and enhance the radiation resistance of PVC materials.