IT has recently been shown by Kassenbeck 1 that drawn fibres of polyethylene terephthalate possess a surface skin, some 2500 A. in thickness. This was demonstrated by making two-stage ...
Polyethylene terephthalate polyester (PET or PETE)is the most common thermoplastic polyester. It is commonly referred to as “polyester.” Polybutylene (PBT,) another thermoplastic polymer, is ...
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