Cov hnab ua npuas ncauj yog cov khoom ntim khoom tsim los ntawm cov ntaub ntawv yas xws li polyethylene (PE) lossis polypropylene (PP) los ntawm cov txheej txheem foaming.
Thaum cov khoom siv tseem ceeb yog yas, cov txheej txheem tsim khoom siv cov txheej txheem ntawm lub cev los yog tshuaj lom neeg ua npuas ncauj los tsim ntau cov pa npuas me me hauv cov khoom, muab nws lub teeb yuag, cushioning, thiab tshav kub rwb thaiv tsev.
Cov ntaub ntawv hauv paus: Feem ntau qis- ntom polyethylene (LDPE) lossis linear qis- ntom polyethylene (LLDPE), nrog ob peb siv polypropylene (PP). Cov ntaub ntawv no hloov tau thiab cuam tshuam -resistant.
Cov tshuab tshuab tshuab: Cov tshuaj tshuab tshuab (xws li azodicarbonamide) lossis cov tshuab tshuab lub cev (xws li carbon dioxide) tau ntxiv thaum lub sijhawm tsim khoom, ua rau nthuav dav thiab ua npuas thaum cua sov.
