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Mbiri ya PET (Polyethylene terephthalate)

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Popeza adapezeka mu 1941, ma polima a poliyesitala akhazikitsidwa bwino m'mafakitala, ma CD ndi mafakitale apulasitiki, chifukwa chakuchita bwino kwambiri. PET amapangidwa kuchokera kuma polima ofananirana kwambiri. Polima ali ndi katundu wambiri woyenererana ndi kupanga zinthu zosachedwa kuwonongeka, zosagwira kutentha kwambiri komanso malonda apamwamba. PET imapezeka panjira zowonekera komanso zamitundu.

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Ubwino
Zina mwazabwino za PET, titha kutchulapo za kulekerera kwakukhazikika komanso kuuma. Nthawi yofulumira kwambiri ya nkhungu
ndi mawonekedwe okoka mozama okhala ndi makulidwe ngakhale khoma. No kuyanika mbale pamaso akamaumba. Kugwiritsa ntchito kwambiri (-40 ° mpaka + 65 °). Zitha kuzizira popindika. Kukana kwabwino kwambiri kwa mankhwala, zosungunulira, zoyeretsera, mafuta ndi mafuta. PET ili ndi maubwino angapo amalonda. Short mkombero nthawi zipangitsa zokolola mkulu ntchito akamaumba. Chokongola: gloss, kuwonekera poyera kapena utoto wosalala ndipo imatha kusindikizidwa kapena kukongoletsedwa mosavuta popanda chithandizo chamankhwala chisanachitike. Ntchito zosunthika zaukadaulo ndikusinthidwa kwathunthu.
 
Kugwiritsa Ntchito Popeza idayambitsidwa pamsika, PET idawunikidwa bwino muntchito zosiyanasiyana monga zida zaukhondo (malo osambira, malo osambira), malonda ogulitsa, magalimoto (nawonso apaulendo), malo ogulitsira mafoni, malo ogonera mabasi ndi zina. PET ndiyabwino kudya ndi ntchito zamankhwala komanso njira yolera yotseketsa madzi a gamma.

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Pali mitundu iwiri ikuluikulu ya PET: Amorphous PET (APET) ndi crystalline PET (CPET), kusiyana kwakukulu ndikuti CPET idapangidwa pang'ono, pomwe APET ndiyabwino. Chifukwa cha kapangidwe kake kama crystalline CPET ndiyosavuta, pomwe APET ili ndi mawonekedwe amorphous, ndikupatsa mawonekedwe owonekera.


Post nthawi: Mar-17-2020