2, Daim ntawv thov tshwj xeeb ntawm PVDC cov khoom sib xyaw hauv Suav teb:
Tuam Tshoj tau pib qhov kev thov ntawm PVDC resin txij thaum xyoo 1980s.Ua ntej, yug ntawm nqaij npua sausage qhia PVDC zaj duab xis rau hauv Suav teb.Tom qab ntawd Suav tuam txhab lag luam tau tsoo lub tebchaws United States thiab Nyij Pooj ntawm cov thev naus laus zis no thiab qhia txog kev siv tshuab thiab khoom siv ntawm PVDC zaj duab xis.Nrog rau kev loj hlob tsis tu ncua ntawm Tuam Tshoj lub teb chaws kev lag luam thiab kev txhim kho ntawm tib neeg cov khoom siv thiab kev coj noj coj ua ntawm lub neej, qib ntawm kev thov rau ntim kuj nce ntxiv.Kev ntim khoom ntau thiab ntau dua yog siv dav hauv txhua yam ntawm kev lag luam hauv lub tebchaws thiab tib neeg txoj kev ua neej.PVDC yog tus thawj coj hauv kev ua tiavsiab barrier ntimqauv nqi efficiency thiab txhim khu kev qha ya raws, oxygen thiab tsw barrier.
Txij li txhua tus neeg muaj kev paub ntau ntxiv ntawm PVDC casing zaj duab xis, ntawm no peb yuav tsom mus rau cov txheej txheem kev thiab cov khoom ntawm PVDC cov yeeb yaj kiab sib xyaw.Cov zaj duab xis sib xyaw ua rau qhov tsis txaus ntawm txhua yam khoom, muab kev ua si tag nrho rau nws qhov kev ua tau zoo, thiab muaj cov yam ntxwv uas ib qho khoom tsis muaj.Kev sib xyaw ua ke ntawm PVDC:
Txheej, qhuav, hnyav-dawb, kub-melt, co-extrusion, thiab lwm yam. Tam sim no, lub domestic ntau lawm ntawm PVDC composite zaj duab xis mas siv txheej txheej, qhuav txoj kev, hnyav-dawb thiab co-extrusion txoj kev:
1) PVDC txheej zaj duab xis
PVDC latex txheej yog siv rau ntawm qhov chaw ntawm lub substrate (OPP, PA, PE, PET, thiab lwm yam) los tsim ib zaj duab xis sib xyaw los txhim kho cov roj teeb meem kev ua haujlwm ntawm lub substrate.Cov yam ntxwv ntawm kev ua haujlwm:
Kev thaiv zoo;Lub thickness ntawm PVDC txheej feem ntau yog 2 ~ 3um, nrog tus nqi qis;Tsis tuaj yeem tiv taus kub ua noj.
2) PVDC laminated composite membrane
Nws yog tsim los ntawm ntau cov yeeb yaj kiab ib txheej, thiab txhua txheej yog sib txuas nrog cov nplaum.Nws tuaj yeem muab faib ua:
Qhuav (solvent) lamination thiab hnyav-dawb lamination.
Cov yam ntxwv ntawm kev ua haujlwm:
A. Nrogsiab barrier khoom thiab hloov tau yooj yim, nws tuaj yeem sib xyaw nrog BOPA, CPP, CPE, BOPP, BOPET, PVC thiab lwm yam yeeb yaj kiab (piv txwv li, BOPP, PET, PA tuaj yeem siv los ua cov txheej luam ntawv sab nrauv, PE, CPP thiab lwm yam zoo thermal sealing los siv tau. Raws li cov txheej txheem thermal sealing, PA qhov zoo puncture kuj tuaj yeem siv los ua cov txheej txheem sib tsoo, thiab PVDC tuaj yeem siv los ua txheej txheej thaiv los thaiv cov pa thiab dej).
B. Zoo kub tsis kam.Nws tuaj yeem ua rau hauv qhov kub thiab txias uas tsis muaj qhov sib xyaw ua ke ntawm cov yeeb yaj kiab uas muaj qhov kub thiab txias ntawm - 20 ℃ ~ 121 ℃;
Cov cuab yeej zoo thiab cov khoom siv cua sov, tsim rau ntau yam ntim tshuab, xim luam ntawv, txwv los ntawm ib zaj duab xis, lub sijhawm no lub thickness ntawm txhua txheej tsis tuaj yeem nyias nyias thiab cov txheej txheem sib xyaw yuav tsum tsis txhob ntau dhau (feem ntau tsis ntau. tshaj 5 txheej).
3) PVDC multilayer co-extruded composite zaj duab xis
Ntau yam ntawm cov yas yog extruded los ntawm ntau yam extruders nyob rau hauv ib lub sij hawm los ntawm ib tug tuag lub taub hau los ua ib tug zaj duab xis nrog kev npaj, pom tseeb interlayer muab, nruj binding thiab zoo ib yam interlayer thickness.Raws li cov txheej txheem sib txawv, nws tuaj yeem muab faib ua co-extrusion cua tshuab thiab co-extrusion cam khwb cia zaj duab xis.PVDC cov khoom feem ntau yog siv los ua cov txheej txheem nruab nrab ntawm cov yeeb yaj kiab sib xyaw.Cov yam ntxwv ntawm kev ua tau zoo: kev tiv thaiv siab, kev tu cev zoo, cov nplaum nplaum yog siv rau kev sib txuas, zam qhov teeb meem ntawm cov kuab tshuaj residue nyob rau hauv qhuav composite (hloov-raws li), thiab tuaj yeem siav ntawm tsawg dua 100 degrees;Cov yeeb yaj kiab tuaj yeem ua tiav los ntawm kev tsim cov thermal thib ob los ntawm kev siv cov khoom ntws;Muaj ntau txheej uas tuaj yeem ua tau, thiab tam sim no nws tau mus txog 13 txheej.Lub interlayer thickness tuaj yeem ua kom nyias nyias, uas tuaj yeem txuag tau tus nqi ntawm cov resin nrog tus nqi siab thiab tau txais cov nqi qis dua.
Post lub sij hawm: Jun-06-2023