Cov khoom siv ua cov thawv yas

Plastics yog raws li hluavtaws los yog ntuj polymer resins. Tom qab ntxiv ntau yam additives, nws muaj ductility nyob rau hauv tej yam kub thiab siab, thiab nws yog ib yam khoom uas yuav kho tau nws cov duab tom qab txias. Cov txheej txheem ntawm ntuj los yog hluavtaws polymer resin molecules nyob rau hauv lub xeev molten thiab cov uniform tis ntawm additive molecules nyob ib ncig ntawm lawv yog hu ua plasticization. Yog tias cov txheej txheem no tau mus txog, nws yog hu ua plasticized. Yog hais tias nws tseem tsis tau mus txog, nws yog xam tias tseem tsis tau plasticized. Kev ntim khoom yas yog ib qho ntawm plaub yam khoom tseem ceeb hauv kev lag luam ntim khoom: ntawv thiab duab los qhia rau 30 feem pua, yas nyiaj rau 25 feem pua, hlau nyiaj 25 feem pua, thiab iav nyiaj rau 15 feem pua.