Cov hnab ntim khoom siv feem ntau yog siv los khaws cov khoom txhua hnub thiab cov khoom ntiag tug xws li khaub ncaws thiab pam.
Cov hnab ntim khoom tuaj yeem muab faib ua cov khoom siv, feem ntau suav nrog PE cov hnab ntim khoom, cov hnab ntim tsis yog -woven fabric, thiab hnab paj rwb. Lawv kuj muaj ntau hom kev siv, suav nrog lwm cov hnab ntim khoom, hnab ntim khaub ncaws, hnab hauv qab thiab thom khwm cia, hnab ntim khoom me me, hnab ntim khoom siv tsheb, hnab ntim khoom, thiab hnab hlaws, thiab lwm yam.
PE cov hnab ntim khoom ntxiv tau muab faib ua cov hnab ntim khoom tsis tu ncua thiab cov hnab ntim ntim cia, thaum lub hnab paj rwb muaj cov hnab ntim cov qauv, paj rwb- cov hnab ntim khoom, thiab lub hnab tsheb.
