Qee qhov tseem ceeb tshaj plaws ntawm Polyvinyl Chloride (PVC) yog:
- Qhov Ceev:PVC yog qhov ntom heev piv rau feem ntau cov yas (qhov hnyav tshwj xeeb nyob ib puag ncig 1.4)
- Kev Lag Luam:PVC yog yooj yim nrhiav thiab pheej yig.
- Qhov nyuaj:Rigid PVC qib zoo rau qhov nyuaj thiab kav ntev.
- Lub zog:Rigid PVC muaj lub zog tensile zoo heev.
Polyvinyl Chloride yog ib yam khoom "thermoplastic" (piv rau "thermoset"), uas muaj feem cuam tshuam nrog txoj kev uas cov yas teb rau cua sov. Cov khoom siv thermoplastic ua kua ntawm lawv qhov chaw yaj (qhov ntau ntawm PVC ntawm qhov qis heev 100 degrees Celsius thiab cov nqi siab dua xws li 260 degrees Celsius nyob ntawm cov khoom ntxiv). Ib qho tseem ceeb tseem ceeb txog cov thermoplastics yog tias lawv tuaj yeem raug cua sov rau lawv qhov chaw yaj, txias, thiab rov ua kom sov dua yam tsis muaj kev puas tsuaj loj. Hloov chaw hlawv, cov thermoplastics zoo li polypropylene liquefy tso cai rau lawv kom yooj yim txhaj tshuaj pwm thiab tom qab ntawd rov ua dua tshiab. Los ntawm qhov sib piv, cov yas thermoset tsuas yog tuaj yeem ua kom sov ib zaug xwb (feem ntau thaum lub sijhawm txhaj tshuaj pwm). Qhov cua sov thawj zaug ua rau cov khoom thermoset teeb tsa (zoo ib yam li 2-ntu epoxy), ua rau muaj kev hloov pauv tshuaj uas tsis tuaj yeem thim rov qab. Yog tias koj sim ua kom cov yas thermoset sov rau qhov kub siab dua zaum ob, nws tsuas yog hlawv xwb. Cov yam ntxwv no ua rau cov khoom thermoset tsis zoo rau kev rov ua dua tshiab.
PVC muaj ntau yam kev siv thiab qhov zoo thoob plaws ntau yam kev lag luam hauv ob qho tib si nws cov qauv khov kho thiab cov qauv yooj ywm. Tshwj xeeb, Rigid PVC muaj qhov ceev siab rau cov yas, ua rau nws nyuaj heev thiab feem ntau muaj zog heev. Nws kuj yooj yim nrhiav tau thiab pheej yig, uas, ua ke nrog feem ntau cov yas 'ntev ntev, ua rau nws yog qhov kev xaiv yooj yim rau ntau yam kev siv hauv kev lag luam xws li kev tsim kho.
PVC muaj qhov ruaj khov heev thiab tsis hnyav, ua rau nws yog cov khoom siv zoo rau kev tsim kho, kev kho dej, thiab lwm yam kev siv hauv kev lag luam. Tsis tas li ntawd, nws cov chlorine ntau ua rau cov khoom no tiv taus hluav taws, lwm qhov laj thawj vim li cas nws thiaj li nrov heev hauv ntau yam lag luam.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-01-2022