Biaxially oriented polypropylene (BOPP) zaj duab xis yog ib hom kev ntim khoom yooj yim.Biaxially oriented polypropylene overwrap zaj duab xis yog ncab hauv tshuab thiab transverse cov lus qhia.Qhov no ua rau cov saw hlau molecular taw qhia hauv ob qho tib si.
Hom kev ntim khoom yooj yim no yog tsim los ntawm cov txheej txheem tubular ntau lawm.Ib lub raj zoo li cov yeeb yaj kiab npuas yog inflated thiab rhuab mus rau nws qhov muag muag (qhov no txawv ntawm lub melting point) thiab yog stretched nrog machinery.Zaj duab xis stretches ntawm 300% - 400%.
Xwb, zaj duab xis kuj tuaj yeem ncav cuag los ntawm cov txheej txheem hu ua tenter-frame film manufacturing.Nrog rau cov txheej txheem no, cov polymers yog extruded mus rau ib tug txias cam khwb cia yob (tseem hu ua ib lub hauv paus ntawv) thiab kos raws lub tshuab kev taw qhia.Tenter-frame film manufacturing siv ob peb txheej ntawm yob los tsim cov yeeb yaj kiab no.
Cov txheej txheem tenter-thav duab feem ntau stretches cov zaj duab xis 4.5: 1 nyob rau hauv lub tshuab kev taw qhia thiab 8.0: 1 nyob rau hauv lub transverse kev taw qhia.Uas tau hais tias, qhov ratios yog tag nrho adjustable.
Cov txheej txheem tenter-thav duab yog ntau dua li cov tubular variant.Nws ua tau ib tug glossy, ntshiab zaj duab xis.Biaxial orientation nce lub zog thiab ua rau muaj zog nruj, txhim kho pob tshab, thiab ua haujlwm siab rau roj thiab roj.
BOPP zaj duab xis kuj boasts nce barrier zog rau vapor thiab oxygen.Impact resistance thiab flexcrack resistance yog qhov zoo dua nrog BOPP piv rau polypropylene shrink zaj duab xis.
Biaxially oriented polypropylene overwrap films feem ntau yog siv rau ntim khoom noj.Lawv hloov pauv cellophane sai sai rau cov ntawv thov suav nrog cov khoom noj txom ncauj thiab ntim luam yeeb.Qhov no feem ntau yog vim lawv cov khoom zoo tshaj thiab cov nqi qis dua.
Ntau lub tuam txhab xaiv los siv BOPP los ntawm qhov chaw ntim cov yeeb yaj kiab ib txwm muaj raws li lawv muaj peev xwm txhim kho thiab muaj peev xwm ua tau zoo dua li cov txheej txheem ntim cov yeeb yaj kiab.
Nws yuav tsum tau muab sau tseg tias thaum tshav kub kub sealing yog nyuaj rau BOPP films.Txawm li cas los xij, qhov no tuaj yeem ua kom yooj yim dua los ntawm txheej txheej zaj duab xis tom qab ua tiav nrog cov khoom siv cua sov-sealable lossis co-extruding nrog co-polymer ua ntej ua.Qhov no yuav ua rau muaj ntau txheej zaj duab xis.
Post lub sij hawm: Apr-04-2023