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塑料瓶的这两个加工特性你知道吗?

2019-01-14 16:29

塑料瓶具有一定的加工和生产方法,加工方法主要有挤出、注射成型、压延、吹塑、模压、层压、浇铸等等好多种方式。而塑料瓶就是经过经过吹塑加工而成, 就是将塑料加热熔解然后压入专门的吹塑模具里, 同时内部有空气高压,将塑料压到模具上从而形成最终产品形状. 因为瓶子在成形的时候受到向外的压力,所以瓶子本身的内应力是向内的,加热的温度达到一定程度后会使塑料软化,内应力受到的阻力变小,于是瓶子会变小了。


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