A special material for high-performance radiation-resistant polypropylene and its preparation method

Abstract

The invention belongs to the technical field of medical material preparation, and discloses a high-performance radiation-resistant polypropylene special material and a preparation method thereof. The polypropylene special material is prepared from the following raw materials by weight: 100 parts of transparent polypropylene, 8-15 parts of polyolefin elastomer, 5-10 parts of modified masterbatch; the modified masterbatch is made of highly transparent Polypropylene, compatibilizer, antioxidant, composite light stabilizer and lubricant are mixed and granulated according to the mass ratio of 85:15:2:3:2. The polypropylene special material has higher impact resistance, good radiation resistance, light transmission and scratch resistance. After electron beam irradiation, its comprehensive performance remains good. At the same time, the types of small molecule additives and The amount of addition is small, which effectively reduces the loss of mechanical properties of the material and the precipitation of small molecules after irradiation, and can better meet the needs of high-performance applications; while the product is prepared by two-time extrusion granulation, the process is simple, the cost is low, and the continuity is strong. The components in the system have good compatibility.

Description

Technical field [0001] The present invention belongs to the technical field of medical materials, and more particularly to a special material for high performance by radiation polypropylene and a preparation method thereof. Background technique [0002] Polypropylene is an important plastic material, which has a wide range of advantages, excellent cost, and excellent performance, has been widely used in the field of medical devices. However, with the continuous development of medical technology, people are increasingly attaching importance to the quality and safety of medical devices, and medical devices usually need to be sterilized before leaving. At present, the commonly used sterilization mainly includes ethylene oxide sterilization and electron beam irradiation sterilization, wherein the electron beam irradiation is sterilized due to non-pollution, no residual, period short, simple operation, and is gradually become a mainstream sterilization. . However, the traditional poly...

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Problems solved by technology

[0005] However, although the above-mentioned medical radiation-resistant polypropylene material has improved the radiation resistance and impact resistance of the material to a certain extent, the impact resistance of the modified material is still limited, and a variety of small molecules need to be added to the raw materials. Additives, so that small molecules are prone to precipitation after irradiation, which seriously affects the safe use of medical devices

In addition, most of the currently reported medical radiation-resistant polypropylene materials still have problems such as low transparency and scratch resistance during storage and transportation, which are increasingly unable to meet the application performance of high-demand medical devices such as humidification bottles.

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