Polyesterndi nsalu yopangidwa yomwe nthawi zambiri imachokera ku petroleum.Nsalu imeneyi ndi imodzi mwa nsalu zodziwika kwambiri padziko lonse lapansi, ndipo imagwiritsidwa ntchito m'mafakitale masauzande osiyanasiyana ogula ndi mafakitale.
Mankhwala, poliyesitala ndi polima makamaka wopangidwa ndi mankhwala mkati mwa ester functional gulu.Ulusi wambiri wopangidwa ndi polyester wopangidwa ndi zomera umapangidwa kuchokera ku ethylene, yomwe ndi gawo la mafuta omwe amathanso kupangidwa kuchokera kuzinthu zina.Ngakhale mitundu ina ya poliyesitala imatha kuwonongeka, ambiri aiwo sakhala, ndipo kupanga ndi kugwiritsa ntchito poliyesitala kumathandizira kuipitsa padziko lonse lapansi.
Muzinthu zina, poliyesitala ingakhale yokhayo yomwe imapanga zovala, koma ndizofala kuti poliyesitala ikhale yosakanikirana ndi thonje kapena ulusi wina wachilengedwe.Kugwiritsa ntchito polyester pazovala kumachepetsa ndalama zopangira, komanso kumachepetsa kumasuka kwa zovala.
Pophatikizana ndi thonje, poliyesitala imapangitsa kuti ulusi wachilengedwewu ukhale wochepa kwambiri, ukhale wolimba, wosalimba komanso wokwinya.Nsalu ya polyester imalimbana kwambiri ndi chilengedwe, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito kwa nthawi yayitali panja.
Nsalu yomwe tsopano tikudziwa kuti polyester idayamba kukwera mpaka yomwe ili yofunika kwambiri pachuma chamakono mu 1926 monga Terylene, yomwe idapangidwa koyamba ndi WH Carothers ku UK.M'zaka zonse za m'ma 1930 ndi 1940, asayansi a ku Britain anapitirizabe kupanga mitundu yabwino ya nsalu ya ethylene, ndipo kuyesetsa kumeneku kunachititsa chidwi kwa osunga ndalama ndi akatswiri a ku America.
Ulusi wa polyester udapangidwa kuti udye kwambiri ndi a DuPont Corporation, omwe adapanganso ulusi wina wotchuka wa nayiloni.Panthawi ya nkhondo yachiwiri ya padziko lonse, mayiko a Allied adapeza kuti akusowa ulusi wa parachute ndi zida zina zankhondo, ndipo nkhondoyo itatha, DuPont ndi mabungwe ena aku America adapeza msika watsopano wazinthu zawo zopangira malinga ndi zomwe zidachitika pambuyo pa nkhondo.
Poyambirira, ogula anali ndi chidwi ndi kukhazikika kwamphamvu kwa polyester poyerekeza ndi ulusi wachilengedwe, ndipo maubwinowa akadali othandizabe mpaka pano.Komabe, m'zaka makumi angapo zapitazi, kuwonongeka kwa chilengedwe kwa ulusi wopangidwa ndi izi kwadziwika bwino kwambiri, ndipo malingaliro a ogula pa polyester asintha kwambiri.
Komabe, poliyesitala idakali imodzi mwansalu zomwe zimapangidwa kwambiri padziko lonse lapansi, ndipo ndizovuta kupeza zovala zogula zomwe zilibe gawo lina la ulusi wa polyester.Zovala zomwe zili ndi poliyesitala zimasungunuka pakatentha kwambiri, pomwe ulusi wambiri wachilengedwe umapsa.Ulusi wosungunuka ukhoza kuwononga thupi losasinthika.
Gulani apamwamba, otsika mtengomatiresi a polyester nsaluPano.
Nthawi yotumiza: Aug-09-2022
