Ana kiran polyester da yawa kamar polyethylene terephthalate, ko PET a takaice. Yawanci yawanci tsakanin 1.38 da 1.41g / cm.
An yi amfani da fim ?in PET a matsayin abin rufe jiki a cikin kayayyakin lantarki. A cikintakaddun suna, banda sauyawar membrane, an yi amfani da fim na EL a matsayin mai ?aukar hanyar kewaye da fim mai gudana. Da farko, ba a cika yin amfani da fim din PET a cikin alamun suna da kuma allon dalili ba.Falilin kuwa shi ne, duk da cewa masana'antun da yawa ne ke kera PET din, amma yanayin fuskar PET galibi ba shi da canjin yanayin rubutu kuma yawanci a bayyane yake ko kuma hazo. bukatun fararen suna; Bayyanar sararin samaniya ba sauki bane kuma kusancin tawada gaba?aya.
Koyaya, yawancin kaddarorin PET, kamar kyakkyawan rufi da juriya mai zafi, ?arfin inji mai ?arfi, nuna gaskiya da matsewar iska, musamman kwanciyar hankali na sinadarai na PET zuwa nau'ikan sunadarai, kazalika da juriya da narkar da shi da ha?akar jiki, sun wuce isa ga sauran membran filastik.
Saboda wannan dalili, a cikin aikace-aikacen suna inda akwai bu?atu na musamman akan aikinta, ana mayar da niyya zuwa PET A lokaci guda, saboda ci gaban yanayin farfajiyar fim ?in PET, da kuma ci gaba da shaharar musamman. inks, aikace-aikacen tawada ta UV zuwa PET kyakkyawan aiki ya haifar da yanayi, a halin yanzu, a cikin masana'antar sunan suna ?ara mai da hankali kan bu?atu da za?i na fim ?in PET.