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 iba amahitamo akunzwe cyane mu bikoresho bitandukanye byo gupfunyika ibiryo.

Yego , CPET udusanduku twa pulasitiki dushobora gucukurwa mu ziko. Dushobora kwihanganira ubushyuhe buri hagati ya -40°C na 220°C (-40°F na 428°F), ibi bikaba bituma dukoreshwa mu ziko za mikoroonde, mu ziko zisanzwe, ndetse no mu bubiko bukonje.

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 ifuru ya mikoroonde n'iy'imashini zisanzwe, mu gihe udupaki twa PP dukoreshwa mu gukoresha mikoroonde cyangwa mu kubika ibintu bikonje. CPET dutanga ubushobozi bwo gukomera no kudacikagurika, mu gihe udupaki twa PP tworoshye kandi rimwe na rimwe dushobora kuba duhendutse.

Udusanduku 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.

A CPET na PET byombi ni ubwoko bwa polyester, ariko bifite imiterere itandukanye bitewe n'imiterere ya molekile. CPET ni ubwoko bwa crystalline bwa PET , butuma ikomera kandi ikarwanya ubushyuhe bwinshi n'ubukonje. PET ikoreshwa cyane mu macupa y'ibinyobwa, mu bikoresho by'ibiribwa, no mu bindi bikoresho byo gupfunyika bidasaba urwego rumwe rwo kwihanganira ubushyuhe. PET irushaho kugaragara, mu gihe CPET isanzwe idasobanutse cyangwa ibonerana.