Tam sim no, cov kav dej polypropylene (PP) yog siv rau hauv tsev kho kom zoo nkauj, thiab cov kav dej HDPE feem ntau yog siv rau cov tsev hauv nroog. Cov neeg tau txais kev pab yuav tsum tau xyuam xim rau cov ntsiab lus hauv qab no thaum xaiv cov kav dej polypropylene (PP), homopolypropylene (PPH) thiab HDPE kav dej rau lub tsev: ua ntej xaiv cov khoom siv raws li lub teb chaws tus qauv, thiab cov neeg siv khoom yuav tsum xyuam xim saib xyuas cov kav dej thaum yuav cov kav dej. Txawm hais tias nws raug cim los siv lub teb chaws tus qauv, yog tias qhov kev siv yog tus qauv kev lag luam, yuav tsum tau them nyiaj rau nws; ua tib zoo saib xyuas cov tsos ntawm cov yeeb nkab, cov yeeb nkab yuav tsum du, tiaj tus, tsis muaj npuas, tsis muaj xim thiab lwm yam tsis xws luag, xim xim, tsis muaj impurities, thiab cov phab ntsa tuab; xyuam xim rau cov kav dej. Qib siab, ua tib zoo xaiv cov qib siab uas ua tau raws li qhov xav tau ntawm kev siv tiag tiag. Feem ntau hais lus, cov kav dej nrog cov yeeb nkab series S hauv qab 2.5 yuav tsum tau siv rau cov kav dej kub, uas yog, phab ntsa thickness ntawm cov kav dej nrog ib txoj kab uas hla ntawm 20 yuav tsum yog ntau tshaj 3.4 hli, thiab cov phab ntsa thickness ntawm cov kav dej nrog ib txoj kab uas hla. 25 yuav tsum ntau tshaj 4.2 hli; cov kav dej yuav tsum muaj rigidity txaus. Tshwj xeeb, cov kav dej yuav tsum tsis txhob deformed thaum nias cov yeeb nkab los ntawm tes; cov khoom siv raw yuav tsum raug xaiv los ntawm cov chaw tsim khoom nrog cov khoom ruaj khov thiab zoo.
