Medical PVC material adopted for steam sterilization, and preparation method thereof

Abstract

The invention relates to a medical PVC material adopted for steam sterilization, and a preparation method thereof. The material comprises, by weight, 100 parts of PVC resin, 40-70 parts of a plasticizer DOP, 1.5-2.0 parts of a calcium / zinc heat stabilizer, 6-10 parts of an assistant heat stabilizer and 1.0-1.5 parts of a lubricant. The PVC resin is the polyvinyl chloride resin prepared through a suspension method, and has a polymerization degree of 1000-1300. The calcium / zinc heat stabilizer is a composite, wherein the composite comprises, by weight, 40-60% of calcium stearate, 20-30% of zincpalmitate, 15-30% of hydroxy magnesium / aluminum. The assistant heat stabilizer is epoxidised soyabean oil. The lubricant comprises, by weight, 55-60% of silicone oil and 40-45%of oxidized polyethylene wax. In the prior art, the PVC material is sterilized through the steam sterilization method, the high temperature (121 DEG C) and the long time treatment (30 minutes) during the steam sterilization process can cause degradation and yellowing of the PVC material, the precipitation of the plasticizer can cause clamminess generation of the instrument surface. With the present invention, the problems in the prior art are solved, the heat resistance of the medical PVC material is improved, and the probabilities of the yellowing and the precipitation of the plasticizer after steam sterilization are reduced.

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 steam sterilization and a preparation method thereof. Background technique [0002] Medical PVC material is 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 broad-spectrum sterilization and strong killing activity, ethylene oxide is also a central nervous system depressant, stimulant and protoplasm poison, which has strong toxic and side effects on the human body. After ethylene oxide disinfection and sterilizati...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a medical PVC material suitable for steam sterilization and its preparation method, which mainly solves the effects of high temperature (121°C) and long time (30 minutes) in the steam sterilization process of existing medical PVC materials It will cause the PVC material to degrade and turn yellow, and the precipitation of plasticizer will cause stickiness on the surface of the device. It can improve the heat resistance of medical PVC materials and reduce the chance of yellowing and plasticizer precipitation after steam sterilization.