Lub hnab ntim khoom yog yooj yim rau cov khoom siv hmoov ntau, thiab muaj cov yam ntxwv ntawm cov ntim loj, lub teeb yuag, thiab yooj yim thauj khoom thiab tshem tawm. Lawv yog ib qho ntawm cov khoom ntim khoom. Nws yog tus cwj pwm los ntawm cov qauv yooj yim, lub teeb yuag, tuaj yeem folded, siv qhov chaw me me thaum rov qab khoob, thiab tus nqi qis. Cov lag luam dav dav yuav siv tshuaj lom neeg ntau dua thiab lwm yam. Raws li lub hnab ntim khoom zoo, nws cov khoom siv yog dab tsi?
1. Polypropylene
Qhov no yog cov khoom tseem ceeb uas tsim lub hnab tuj, uas suav txog li 90 feem pua ntawm qhov hnyav ntawm tag nrho lub hnab. Txawm li cas los xij, cov ntaub ntawv polypropylene tuaj yeem muab faib ua qhov siab thiab tsis tshua muaj siab, thiab hauv cov txheej txheem ntawm kev siv, ob qho tib si yog siv ua ke. Feem ntau xav txog lub kaum sab xis ntawm nws lub zog tensile thiab kev pabcuam lub neej.
2. Polyethylene
Nws feem ntau yog cov thermoplastic cob tau los ntawm polymerization ntawm ethylene. Polyethylene tsis muaj ntxhiab tsw, tsis muaj tshuaj lom, zoo li siv quav ciab, thiab muaj qhov kub thiab txias tsis kam (qhov qis tshaj qhov ua haujlwm kub tuaj yeem ncav cuag -100 ~ -70 degree ). High density polyethylene (HIGH DENSITY POLYETHYLENE, HDPE) feem ntau hu ua polyethylene tsis tshua muaj siab, thiab LDPE Piv nrog LLDPE, nws muaj qhov kub thiab txias tsis kam, roj kuj, chav permeability tsis kam thiab ib puag ncig kev ntxhov siab tawg. Tsis tas li ntawd, hluav taws xob rwb thaiv tsev, cuam tshuam tsis kam thiab txias kuj yog qhov zoo heev.
3. Filler masterbatch
Qhov no yog yuav tsum tau siv, vim hais tias cov khoom tseem ceeb ntawm lub hnab loj muaj ib tug npaum li cas ntawm cov dej ntau los yog tsawg thaum lub sij hawm tsim cov txheej txheem, thiab ntxiv cov ntoo muab tub lim no tuaj yeem nqus cov dej zoo yam tsis muaj qhov muag dej, ua rau tsis muaj kev rub tawm.
