Cov thoob khib nyiab yas yog cov thawv khib nyiab uas ua los ntawm siab - ntom polyethylene (HDPE) lossis polypropylene (PP). Lawv yog cov pheej yig, siv tau yooj yim, thiab tsim nyog rau kev cais thiab sau cov khib nyiab.
Lawv qhov chaw pov tseg muaj cov kab sib npaug, qhov chaw du kom yooj yim tu, thiab tuaj yeem muab tso rau kom txuag chaw thauj khoom. Lawv tiv taus qhov kub ntawm -30℃mus rau 65℃thiab muaj ntau yam xim rau kev tswj xyuas yooj yim.
Cov khoom no tiv taus cov kua qaub thiab alkali corrosion thiab muaj zog tiv thaiv huab cua, ua rau lawv siv dav hauv kev tswj vaj tsev, chaw tsim khoom, thiab kev huv huv. Tam sim no, muaj kwv yees li 500 lab lub thoob khib nyiab siv hauv Suav teb, nrog rau 66% ua los ntawm cov ntawv hlau thiab ntoo, thiab 30% yog cov hnab yas rov ua dua tshiab, qhia tias muaj peev xwm ua lag luam tseem ceeb. Cov thoob khib nyiab yas siv lub zog-txuag cov ntaub ntawv hauv lawv cov khoom tsim, txo cov nqi khiav lag luam thiab txuas ntxiv lawv lub neej, ua rau lawv muaj kev huv huv hauv ib puag ncig pej xeem thiab tsev.
