Non-woven shopping bag yog cov ntaub ntawv tsis muaj cov yas, muaj coob tus neeg xav tias daim ntaub yog ib yam khoom siv, yog ib qho tsis to taub, feem ntau siv cov khoom tsis muaj ntaub ntawv rau polypropylene (cov lus Askiv abbreviated PP, feem ntau hu ua polypropylene) lossis Polyethylene terephthalate (lus Askiv abbreviation tsiaj, feem ntau hu ua polyester), hnab yas ntawm cov ntaub ntawv raw yog polyethylene, ob lub tshuaj txawm tias lub npe zoo sib xws, tab sis nyob rau hauv cov txheej txheem tshuaj yog deb heev.
Cov tshuaj molecular qauv ntawm polyethylene muaj kev ruaj ntseg zoo heev, nyuab nyuab heev, ces lub hnab yas yuav siv sij hawm 300 xyoo rau decompose, thiab cov qauv ntawm polypropylene tsis muaj zog, molecular saw tau yooj yim tawg, yog li yuav ua tau zoo degraded, Thiab nyob rau hauv ib daim ntawv tsis muaj tshuaj lom mus rau tom ntej ib puag ncig ib puag ncig, ib lub hnab ntim khoom tsis-khom nqi hauv 90 hnub tuaj yeem pwm, los ntawm lub Essence ntawm polypropylene (PP) rau cov raug yas ntau yam, tom qab pov tseg ntawm tej huab cua phem tsuas yog 10 % Lub hnab yas.