Qhov "Carriage" Showdown: Polyether vs. Polyester-Thaum cov ntaub ntawv no tsis txiav txim siab yellowing los ntawm lub teeb raug, lawv hais kom ruaj khov nyob rau hauv siab - kub thiab av noo. Txawm tias tom qab xaiv "locomotive" (cov khoom siv hauv paus), kev xaiv "carriage" (polyether lossis polyester tivthaiv) tseem tuaj yeem dhau los ua qhov tsis muaj zog hauv ib puag ncig tshwj xeeb.
1. Polyether-raws li TPU: rhiab heev rau qhov kub thiab txias thiab nquag oxidation. Nws cov txiaj ntsig muaj xws li kev ua haujlwm zoo hydrolysis zoo heev- nws tsis hydrolyze raws li lub sijhawm ntev rau hauv dej lossis kev sib cuag nrog hws- thiab qis dua - kub elasticity. Nws qhov tsis zoo yog qhov poob ntawm cov neeg kho tshuab lub zog ntawm qhov kub thiab txias thiab susceptibility rau oxidation, uas kuj txo cov neeg kho tshuab lub zog. Thaum aliphatic polyether TPU raug kub siab (piv txwv li, siab dua 80 degree) rau lub sijhawm ntev, cov ntu polyether raug thermo-oxidative degradation, ua rau poob ntawm gloss.
2. Polyester Cheebtsam - lawv puas yooj yim rau dej thiab ya raws? Cov lus ntawd tsuas yog ib nrab xwb. Standard polyester: Nws cov hydrolysis tsis kam yog qhov tsis zoo, tshwj xeeb tshaj yog nyob rau hauv siab -kub, acidic, lossis alkaline ib puag ncig. Nyob rau hauv tej yam kev mob ntawm kub kub thiab av noo, los yog thaum sib cuag nrog hws los yog kua qaub los nag, polyester molecular chains yog nquag mus hydrolytic cleavage; Qhov no ua rau txo lub zog thiab kev ua haujlwm tseem ceeb ntawm kev ua haujlwm tsis zoo, tshwm sim raws li qhov chaw fogging, whitening, tackiness, lossis txawm tawg. Nws feem ntau pom zoo rau cov ntawv thov nrog lub neej tsim tsis pub ntau tshaj ob xyoos. High- qib polyester: Cov qauv kev hloov kho tau ua los txo cov ntu uas raug rau hydrolysis, thiab hydrolysis-cov tshuaj tiv thaiv ntxiv tau muab tso rau hauv cov qauv, ua rau muaj qhov zoo dua hydrolysis tsis kam piv rau cov qauv polyester. Hauv kev ua haujlwm ib puag ncig yam tsis muaj dej ntau, nws tuaj yeem ua haujlwm tau 5 txog 8 xyoo. Nws feem ntau yog siv rau hauv daim ntawv thov cuam tshuam nrog cov roj lossis hauv qhov chaw qhuav.