Express hnab yog ib qho ntawm cov khoom siv ntim khoom siv hauv kev lag luam nthuav qhia. Lawv siv los ntim thiab tiv thaiv cov khoom kom tsis txhob puas thaum lub sijhawm thauj mus los.
Muaj ntau ntau hom hnab nthuav qhia, ntawm cov hnab yas nthuav dav yog siv ntau tshaj plaws. Vim tias lawv yog lub teeb yuag, tsis muaj dej, thiab ua haujlwm yooj yim, lawv feem ntau siv los qhwv cov khoom hnyav.
Lub hnab nthuav qhia yog ua los ntawm cov ntaub ntawv yas xws li polyethylene thiab polypropylene. Cov ntaub ntawv no yog lub teeb yuag, tsis muaj dej, thiab ua haujlwm yooj yim. Nyob rau tib lub sijhawm, qee lub hnab nthuav qhia kuj ntxiv cov ntaub ntawv xws li cua cushion zaj duab xis los ua kom lawv lub siab tsis kam, av qeeg thiab lwm yam khoom.
Cov yam ntxwv ntawm lub hnab nthuav qhia feem ntau yog tshwm sim hauv cov hauv qab no:
• Lub teeb yuag: Cov hnab nthuav qhia feem ntau yog ua los ntawm cov khoom siv hnyav kom txo qhov hnyav thauj khoom thiab txo cov nqi thauj khoom.
• Waterproof: Cov khoom ntawm lub hnab nthuav qhia feem ntau yog tsis muaj dej, uas tuaj yeem tiv thaiv cov khoom ntim los ntawm noo noo.
• Compression resistance: Cov khoom ntawm lub hnab nthuav qhia muaj qee yam compression tsis kam, uas tuaj yeem tiv thaiv cov khoom ntim los ntawm sab nraud quab yuam xws li extrusion thaum thauj.
• Pob tshab: Cov khoom ntawm lub hnab nthuav qhia feem ntau yog pob tshab, ua kom yooj yim rau tus neeg tau txais kev pom cov ntsiab lus ntawm pob.
• Kev tiv thaiv ib puag ncig: Qee lub hnab nthuav tawm yog ua los ntawm cov khoom siv rov ua dua tshiab, uas ua tau raws li kev tiv thaiv ib puag ncig thiab pab txo cov pa phem ib puag ncig.
