| 摘要 |
PURPOSE: An airtight container is provided to improve the thermal forming property by mixing a polypropylene and a polyolefin and to increase the shock resistant property by giving the tensile property without damaging the transparency and the strength. CONSTITUTION: An airtight container is formed by mixing, melting and injecting a polypropylene of 80¯90weighg% with a polyolefin of 10¯20weight%. A forming temperature is 220¯230degreeC and a forming pressure is 53¯63kg/cm2. Thereby, the shock resistant property, the heat proof property, the winterizing property and the durability are improved by compensating the tensile property with a polyolefin material without reducing the transparency and the strength of a polypropylene material.
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