Koj puas tau muaj ib tus neeg siv khoom yws tias koj lub hnab ntim dej khov tawg thaum lub sijhawm lawv tau nqa los ntawm lub freezer? Los yog phem dua - ib lub khw muag khoom tsis lees paub koj qhov kev txiav txim ntau vim tias lub hnab sib cais thaum sau?
Raws li tus tswv ntawm lub Hoobkas kuv tus kheej, kuv tau hais rau ntau tus neeg yuav khoom uas ntsib tib lub taub hau: tsis tshua muaj zog hauv PE hnab khov. Nws ua rau:
Cov dej khov yaj yaj cov dej hauv kev thauj mus los
Cov khoom xa rov qab & puas lub npe nrov npe
Cov nqi ntim ntau dua
Vim li cas feem ntau PE hnab ntim dej khov tawg?
Ntau tus neeg muag khoom siv tus qauv LDPE (Low-Density Polyethylene) nrog rau qhov tsis zoo tsawg- qhov kub thiab txias. Thaum cov dej khov nthuav dav hauv lub hnab, cov khoom siv tsis tuaj yeem ncab - nws tsuas yog tawg.
Peb daws nws li cas?
Peb tau hloov kho peb cov PE sib xyaw kom muaj zog los ntawm 40% yam tsis tau nce nqi ntau. Nov yog qhov peb ua txawv:
Ntxiv metallocene polyethylene (mPE) - Txhim kho qhov puncture kuj txawm nyob ntawm -20 degree
Ua kom cov yeeb yaj kiab thickness zoo sib xws - Tsis yog tuab tuab, tab sis ntxiv dag zog rau hauv kev ntxhov siab- thaj chaw muaj kev cuam tshuam (hauv qab & gussets)
Ua kom zoo kos- qhov sib piv - Qhov no ua kom cov hlua khi polymer kom zoo dua lub zog tsim kua muag
Tsis txhob cia lub hnab nkig ua rau koj cov neeg siv khoom.