ʻAʻohe ʻokoʻa ma waena o PET a me APET ea. ʻO PET ka polyester, nona ka inoa kemika o polyethylene terephthalate. Hiki ke hana ʻia ʻo PET me nā polymers i hoʻopili ʻia i ʻelua ala mua; amorphous a crystalline paha. ʻO ka mea maʻamau, ʻo nā mea āpau āpau āu e launa pū ai me ka amorphous me hoʻokahi ʻokoʻa nui; Nā pā meaʻai meaʻai microwave, inā hana ʻia mai PET, i hana ʻia mai C-PET (crystallized PET). ʻO ka PET holoʻokoʻa holoʻokoʻa me Mylar a me nā hue wai i hana ʻia mai A-PET (amorphous PET) a i nā manawa he nui, waiho wale ʻia ka "A".

ʻO ka hōʻailona hoʻopōʻaiapuni ʻo Mobius loop no polyester ʻo PET me ka helu 1, no laila he nui ka poʻe e kuhikuhi nei i polyester me PET. Makemake nā mea ʻē aʻe e kikoʻī hou aʻe, ma ka hōʻike ʻana inā he crystalline C-PET ka polyester, APET amorphous, RPET i hana hou ʻia, a PETG paha i hoʻoponopono ʻia. He mau hoʻololi liʻiliʻi kēia, i mea e maʻalahi ai ka hana ʻana i ka polyester no ka huahana hopena i manaʻo ʻia, inā ma ka hoʻoheheʻe ʻana, ka hoʻoheheʻe ʻana, thermoforming, a i ʻole extruding a me ka hoʻopau ʻana i nā hana e like me ka ʻoki make.

Hele mai ʻo PETG me kahi wahi kumukūʻai kiʻekiʻe a ʻoi aku ka maʻalahi o ka make ma mua o ka APET me ka hoʻohana ʻana i nā lakohana ʻoki maʻamau. I ka manawa like, ʻoi aku ka palupalu a me nā scratches i ʻoi aku ka maʻalahi ma mua o APET. Hana pinepine nā mea hoʻololi ʻaʻole lako pono e make ʻoki iā APET me PETG no ka mea ʻoi aku ka palupalu a ʻoi aku ka maʻalahi o ka PETG, no laila maʻamau ka uhi ʻia ʻana o ka poly (ʻo kēia kahi uhi ʻāpana “Saran wrap”). Pono e hemo kēia masking mai kekahi ʻaoʻao i ka wā o ka paʻi ʻana, akā waiho mau ʻia ka masking ma kekahi ʻaoʻao i ka wā o ka ʻoki make ʻana e pale ai i ka wili ʻana. Lōʻihi loa ia manawa a no laila ʻoi aku ka pipiʻi e wehe i ka masking poli, keu hoʻi inā e paʻi ana i nā pale he nui.

Hana ʻia nā hiʻohiʻona kiko kūʻai he nui mai PETG, ʻoiai he ana pinepine lākou a paʻakikī hoʻi e ʻokiʻoki. ʻO kekahi kumu e hiki ai ke waiho i ka masking poli e pale i ka hōʻike i ka wā o ka lawelawe ʻana a me ka hoʻouna ʻana a laila lawe ʻia ke hoʻonohonoho ʻia ka hōʻike. ʻO kēia kahi kumu nui e kuhikuhi pono ai nā mea hoʻolālā he nui iā PETG no ka hōʻike o ke kūʻai aku me ka ʻole o ka ʻike inā APET a i ʻole PETG ka mea kūpono loa no ka hoʻohana hopena i manaʻo ʻia a i ʻole ka hana ʻana (paʻi, ʻoki ʻoki, hoʻopili ʻana, a pēlā aku.). Loaʻa ka APET a hiki i ka 0,030 ″ mānoanoa, akā ʻo ka PETG hoʻomaka pinepine ma 0.020.

Aia kekahi mau ʻokoʻa ʻokoʻa ma waena o PETG a me APET, a inā ʻaʻole ʻoe kamaʻāina i nā pono a huki i ke kua o ka hana ʻana o PET, hoʻomanaʻo i ka inoa a huikau, akā palekana ke ʻōlelo ʻana e pili ana nā mea i luna i ka polyester a, mai kahi manaʻo hoʻopōʻaiapuni, mālama like ʻia lākou āpau.