Yam khoom twg zoo dua, Polystyrene lossis Pp?

PP (polypropylene) thiab PET (polyethylene terephthalate, los yog polyester) yog cov khoom siv yas. Lawv txhua tus muaj lawv tus kheej yam ntxwv thiab daim ntawv thov scenarios. Peb tsis tuaj yeem hais tias yam khoom twg zoo dua, tab sis qhov twg zoo dua? Nws yuav tsum raug xaiv raws li kev siv tshwj xeeb.

Cov yam ntxwv thiab kev siv ntawm PET:

Cov tsos mob: Milky dawb, du nto, tsis muaj tshuaj lom.
Lub cev muaj zog: Nws muaj zog dabtsi yog khoov siab (txog 4000MPa), siab thiab kub tsis kam, thiab zoo stability.
Nqe: Tus nqi qis dua.
Daim ntawv thov teb: dav siv hauv kev tsim ntau lub raj mis lossis khoom siv hluav taws xob.

Cov yam ntxwv thiab kev siv ntawm PP:

Cov tsos mob: Dawb waxy, lub teeb kev ntxhib los mos thiab siab transparency.
Lub cev muaj zog: Kev ua haujlwm kub zoo, kev ua haujlwm kub ntau, txog li 110-120 degrees Celsius.
Kev laus tsis kam: Yooj yim rau hnub nyoog, tsis zoo cuam tshuam lub zog ntawm qhov kub thiab txias.
Kev Siv: Feem ntau yog siv hauv kev txhaj tshuaj molding khoom lossis tshuaj lom neeg thiab kev tsim kho kev lag luam.

Feem ntau. thaum xaiv, yog tias kev tiv thaiv ib puag ncig thiab cov nqi raug txiav txim siab, PP tej zaum yuav yog qhov kev xaiv zoo dua vim tias nws yooj yim rau rov siv dua thiab tus nqi qis dua. Txawm li cas los xij, yog tias kev nthuav qhia thiab kev ua haujlwm ntev yog qhov tseem ceeb, PET tej zaum yuav tsim nyog dua vim tias nws muaj xim ntau dua, tuaj yeem tiv taus qhov kub thiab txias dua, thiab tej zaum yuav ua rau pom kev zoo dua. Qhov kev txiav txim zaum kawg yuav tsum yog raws li cov kev xav tau tshwj xeeb ntawm daim ntawv thov thiab cov khoom siv tshwj xeeb.