Udupaki twa CPET, cyangwa udupaki twa Crystalline Polyethylene Terephthalate, ni ubwoko bw'ibipfunyika by'ibiribwa bikozwe mu bwoko runaka bw'ibikoresho bya thermoplastic. CPET izwiho kurwanya ubushyuhe bwinshi n'ubukonje, bigatuma ikundwa cyane mu bikoresho bitandukanye byo gupfunyika ibiryo.

Yego , amasahani ya pulasitiki ya CPET ashobora gushyirwa mu ziko. Ashobora kwihanganira ubushyuhe buri hagati ya -40°C na 220°C (-40°F na 428°F), ibi bikaba bituma akoreshwa mu ziko za mikoroonde, mu ziko zisanzwe, ndetse no mu bubiko bukonje.

A Itandukaniro rikomeye riri hagati y'udupaki twa CPET n'udupaki twa PP (Polypropylene) ni ubushobozi bwatwo bwo kudashyuha n'imiterere y'ibikoresho. Udupaki twa CPET turwanya ubushyuhe kandi dushobora gukoreshwa mu dupaki twa mikoroonde n'utwo mu ziko zisanzwe, mu gihe udupaki twa PP dukoreshwa mu gukoresha mikoroonde cyangwa mu kubika ibintu bikonje. CPET itanga ubushobozi bwo gukomera no kudacikagurika, mu gihe udupaki twa PP tworoshye kandi rimwe na rimwe dushobora kuba duhendutse.

Udupaki twa CPET dukoreshwa mu gupakira ibiryo bitandukanye, harimo ibiryo byateguwe, ibikomoka ku migati, ibiryo bikonjeshejwe, n'ibindi bintu bishobora kwangirika bisaba kongera gushyushya cyangwa guteka mu ifuru cyangwa muri mikoroonde.

CPET na PET byombi ni ubwoko bwa polyester, ariko bifite imiterere itandukanye bitewe n'imiterere ya molekile. CPET ni ubwoko bwa PET bukozwe mu buryo bwa crystalline, butuma ikomera cyane kandi ikarwanya ubushyuhe bwinshi n'ubukonje. PET ikoreshwa mu macupa y'ibinyobwa, mu bikoresho by'ibiribwa, no mu bindi bikoresho byo gupfunyika bidasaba ko ubushyuhe bungana. PET irabonerana cyane, mu gihe CPET isanzwe idasobanutse neza cyangwa ibonerana gato.