Taw qhia txog kev ntim khoom ntawm lub tshuab nqus tsev vacuum

Plastic ntim yog hais txog kev ntim hauv cov yas. Yas yog cov khoom siv hluavtaws lossis ntuj polymer cob ua cov khoom tseem ceeb. Tom qab ntxiv ntau yam additives, nws muaj ductility nyob rau hauv ib tug tej yam kub thiab siab, thiab tuaj yeem kho nws cov duab tom qab txias.