Xa kuthelekiswa ne-PET kunye ne-PP izinto, i-PP iya kuba yinto ephezulu kakhulu ekusebenzeni.1. Umahluko kwinkcazo ye-PET (i-Polyethylene terephthalate) igama lesayensi yi-polyethylene terephthalate, eyaziwa ngokuba yi-polyester resin, i-resin material.I-PP (ipolypropylene) s...
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