Palibe kusiyana pakati pa PET ndi APET pulasitiki. PET ndi polyester, yomwe ili ndi dzina la mankhwala a polyethylene terephthalate. PET ikhoza kupangidwa ndi ma polima olumikizidwa m'njira ziwiri zoyambirira; amorphous kapena crystalline. Pafupifupi, zonse zomwe mumakumana nazo ndizosiyana ndi chimodzi chachikulu; mayikirowevu azakudya a microwave omwe, ngati amapangidwa kuchokera ku PET, amapangidwa kuchokera ku C-PET (crystallized PET). Kwenikweni ma PET onse omveka bwino kuphatikiza Mylar ndi mabotolo amadzi amapangidwa kuchokera ku A-PET (amorphous PET) ndipo nthawi zambiri, "A" amangosiyidwa.

Chizindikiro cha Mobius loop chobwezeretsanso polyester ndi PET ndi nambala 1, motero anthu ambiri amatcha polyester ngati PET. Ena amakonda kukhala achindunji, posonyeza ngati polyester ndi crystalline C-PET, amorphous APET, RPET yobwezeretsanso, kapena glycol yosinthidwa PETG. Izi ndizosiyana pang'ono, zomwe cholinga chake ndikuchepetsa poliyesitala pazomwe zimapangidwe kumapeto kwake, kaya pobowola jakisoni, kuwumba nkhonya, thermoforming, kapena extruding komanso kumaliza ntchito monga kudula kufa.

PETG imabwera ndi mtengo wokwera kwambiri ndipo ndikosavuta kufa kudula kuposa APET pogwiritsa ntchito zida zodulira zakufa. Nthawi yomweyo, ndiyofewa komanso mikwingwirima yosavuta kuposa APET. Otembenuza omwe alibe zida zoyenera kufa APET nthawi zambiri amagwira ntchito ndi PETG chifukwa chakuti PETG ndiyofewa komanso mikwingwirima ndiyosavuta, chifukwa chake nthawi zambiri imakhala yosungidwa (ichi ndi chophimba chochepa kwambiri cha "Saran kukulunga"). Kubisa uku kumayenera kuchotsedwa mbali imodzi posindikiza, koma masking nthawi zambiri imasiyidwa mbali inayo pakadula kufa kuti itetezeke. Imatenga nthawi yambiri motero imakhala yotsika mtengo kuchotsa masking poly, makamaka ngati mukusindikiza mapepala ambiri.

Zowonetsa zambiri zogulitsa zimapangidwa kuchokera ku PETG, chifukwa nthawi zambiri zimakhala zolemera zolemera komanso zimakhala zovuta kufa. Chifukwa china ndikuti poly masking imatha kusiyidwa kuti iteteze chiwonetserochi mukamayendetsa ndi kutumiza kenako kuchotsedwa pomwe chiwonetserocho chikukhazikitsidwa. Ichi ndi chifukwa chachikulu chomwe opanga ambiri amangotchulira PETG pazogulitsa malo osamvetsetsa ngati APET kapena PETG ndiye chinthu choyenera kwambiri kugwiritsa ntchito kumapeto kapena kusindikiza (kusindikiza, kudula kufa, kumata, etc.). APET imapezeka mpaka 0.030 ″ makulidwe, pomwe PETG nthawi zambiri imayamba pa 0.020 ″.

Pali zosiyana zina zobisika pakati pa PETG ndi APET, ndipo ngati simukudziwa phindu lake ndikubwerera m'mbuyo momwe PET amapangidwira, kukumbukira dzinalo kumasokoneza, koma ndibwino kunena kuti zonsezi zanenedwa ku polyester ndipo, kuchokera pamawonekedwe obwezeretsanso, onse amathandizidwa chimodzimodzi.