Ingabe i-polypropylene inobuthi lapho kushisa?
I-polypropylene, eyaziwa nangokuthi i-PP, iyinhlaka ye-thermoplastic kanye ne-polymer ephezulu yamangqamuzana enezici ezinhle zokubumba, ukuguquguquka okuphezulu, nokumelana nokushisa okuphezulu. Isetshenziswa kakhulu emaphaketheni okudla, amabhodlela obisi, izinkomishi zepulasitiki ze-PP nezinye izidingo zansuku zonke njengepulasitiki yebanga lokudla, kanye nasezintweni zasendlini, izingxenye zezimoto neminye imikhiqizo esindayo yezimboni. Nokho, ayinabo ubuthi lapho ishiswa.
Ukushisa ngaphezu kuka-100 ℃: I-polypropylene ehlanzekile ayinabo ubuthi
Emazingeni okushisa asekamelweni nokucindezela okuvamile, i-polypropylene iyinto engenaphunga, engenambala, engenabuthi, ne-semi-transparent granular material. Izinhlayiya zepulasitiki ezihlanzekile ze-PP ezingacutshunguliwe zivame ukusetshenziswa njengezindwangu zamathoyizi aluhlaza, futhi izimboni zokuzijabulisa zezingane ziphinde zikhethe izinhlayiya zepulasitiki ze-PP ezingafihli lutho ukuze zilingise izinqaba zesihlabathi ukuze izingane zidlale ngazo. Ngemuva kokuthi izinhlayiya ezihlanzekile ze-PP zenze izinqubo ezifana nokuncibilika, ukukhishwa, ukubunjwa kokushaywa, nokubunjwa komjovo, zakha imikhiqizo ehlanzekile ye-PP ehlala ingenabo ubuthi ekamelweni lokushisa. Ngisho noma ingaphansi kokushisisa izinga lokushisa eliphezulu, ifinyelela emazingeni okushisa angaphezu kuka-100℃ noma isesimweni esincibilikisiwe, imikhiqizo ye-PP ehlanzekile isabonisa ukungabi nabuthi.
Kodwa-ke, imikhiqizo ye-PP ehlanzekile iyabiza futhi isebenza kabi, njengokumelana nokukhanya okungekuhle kanye nokumelana ne-oxidation. Isikhathi esiphezulu sempilo yemikhiqizo ye-PP emsulwa singafika ezinyangeni eziyisithupha. Ngakho-ke, iningi lemikhiqizo ye-PP etholakala emakethe yimikhiqizo ye-polypropylene exutshwe.
Ukushisa ngaphezu kwe-100 ℃: Imikhiqizo yepulasitiki ye-Polypropylene inobuthi
Njengoba kushiwo ngenhla, i-polypropylene ehlanzekile inokusebenza okungalungile. Ngakho-ke, lapho kucutshungulwa imikhiqizo yepulasitiki ye-polypropylene, abakhiqizi bazokwengeza izinto zokugcoba, ama-plasticizers, ama-light stabilizer, nezinye izinto ukuze bathuthukise ukusebenza kwabo futhi bathuthukise isikhathi sabo sokuphila. Izinga lokushisa eliphezulu lokusebenzisa le mikhiqizo yepulasitiki ye-polypropylene eguquliwe ngu-100 ℃. Ngakho-ke, endaweni yokushisa engu-100 ℃, imikhiqizo ye-polypropylene eguquliwe izohlala ingenabo ubuthi. Kodwa-ke, uma izinga lokushisa lokushisa lidlula i-100 ℃, imikhiqizo ye-polypropylene ingase ikhiphe ama-plasticizer kanye nezinto zokugcoba. Uma le mikhiqizo isetshenziselwa ukwenza izinkomishi, izitsha, noma izitsha, lezi zithako zingase zingene ekudleni noma emanzini bese zimuncwa abantu. Ezimweni ezinjalo, i-polypropylene ingaba yingozi.
Ukuthi i-polypropylene inobuthi noma cha depeithola kakhulu kububanzi bokusebenza kwayo kanye nezimo evezwe kuzo. Kafushane, i-polypropylene emsulwa ngokuvamile ayinabo ubuthi. Kodwa-ke, uma ingeyona i-polypropylene emsulwa, uma izinga lokushisa lokusetshenziswa selingaphezu kuka-100 ℃, ingaba yingozi.