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INJECTION MOULDING PROCESS TO FORM A PREFORM FROM AMORPHOUS PET: CRYSTALLISED PET ADDED TO AMORPHOUS PET
INJECTION MOULDING PROCESS TO FORM A PREFORM FROM AMORPHOUS PET: CRYSTALLISED PET ADDED TO AMORPHOUS PET
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机译:从非晶态PET形成瓶坯的注塑工艺:将结晶态PET添加到非晶态PET中
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摘要
There is provided a process for injection molding a preform for stretch blow molding a thin-wall vessel such as a bottle using amorphous polyethylene terephthalate (A-PET) as a molding material, wherein a required amount of crystallized polyethylene terephthalate (C-PET) is added to the A-PET. The resulting mixture material can be easily plasticized to increase the IV value of the molding material to a value higher than that of A-PET so as to injection mold the preform. A-PET which is hardly usable as a molding material for stretch blow molding due to its low IV value is made usable as a molding material for stretch blow molding by increasing its IV value making use of plasticization at the time of injection molding. IMAGE
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