Tom ntej: Dab tsi yog Hloov Kho Qhov Chaw Ntim Ntim
MAP yog cov cuab yeej khaws cia uas huab cua nyob ib puag ncig cov khoom noj tau hloov los ntawm kev tswj cov roj sib xyaw, feem ntau nitrogen, carbon dioxide, thiab cov seem me me ntawm oxygen. Cov roj muaj pes tsawg leeg raug xaiv rau cov khoom: siab nitrogen rau cov khoom noj txom ncauj kom tsis txhob muaj cov pa oxygen, cov pa roj carbon dioxide siab rau cov nqaij tshiab kom qeeb microbial kev loj hlob, thiab cov pa me me rau cov zaub uas tseem ua pa. Kev vam meej ntawm MAP yog nyob ntawm cov khoom ntim tuav cov roj sib tov ntawm qib zoo. Yog tias cov pa oxygen nkag mus rau hauv lossis cov pa roj tawm mus, cov nyhuv khaws cia yuav ploj. Qhov no yog qhov uas aluminium ntawv ci muab nws cov kev koom tes tshwj xeeb raws li qhov yuav luag zoo meej txheej txheej.
Vim li cas Aluminium Ntawv Nyiaj Yog Qhov Kev Xaiv Ntawm Kev Xaiv
Ib txheej txheej txheej txhuas muaj cov pa oxygen hauv qab 0.1 cm3 ib square meter ib hnub ntawm atmospheric siab, uas yog ntau txhiab zaus qis dua li feem ntau cov yeeb yaj kiab polymer. Cov dej vapor kis tau zoo ib yam li negligible. Cov ntawv ci tseem thaiv cov teeb pom kev zoo thiab hluav taws xob ultraviolet, tiv thaiv cov khoom xws li kas fes, tshuaj yej, thiab mis nyuj hmoov los ntawm oxidation thiab yees duab- degradation. Vim yog cov khoom no, cov ntawv ci-raws li laminates tso cai rau lub pob roj muaj pes tsawg leeg kom nyob ruaj khov mus txog kaum ob lub hlis lossis ntau dua yam tsis muaj oxygen absorbers ntxiv.
Hom Laminate Structure
MAP laminate feem ntau ua ke nrog txheej txheej txheej txheej txheej, txheej txheej txheej, thiab cov cua sov- txheej txheej sab hauv. Ib qho qauv yog PET zaj duab xis ntawm 12 micrometers, aluminium ntawv ntawm 7 mus rau 12 micrometers, thiab polyethylene los yog cam khwb cia polypropylene sealant ntawm 40 mus rau 80 micrometers. Cov ntawv ci kuj tseem tuaj yeem nyob nruab nrab ntawm ob lub yeeb yaj kiab polymer los tiv thaiv nws los ntawm flex cracking. Rau cov khoom retortable, lub siab -kub polypropylene sealant yog siv, thiab laminate yog tsim los kom muaj sia nyob chav ua kom tsis muaj menyuam tsis muaj delamination.
Kev txiav txim siab
Ntawv nyiaj thickness ntawm 6 mus rau 12 micrometers yog ib yam rau MAP laminates.
Pinholes nyob rau hauv ntawv ci yuav tsum tau txo kom tsawg vim hais tias txhua tus pinhole yog ib tug muaj peev xwm pa paug txoj kev.
Flexing thaum thauj tuaj yeem tawg cov ntawv ci, yog li laminates tuaj yeem ntxiv txheej txheej polyethylene cushioning.
Kev ruaj ntseg foob raug txheeb xyuas los ntawm kev ntsuas tawg thiab ntsuas oxygen headspace.
Daim ntawv thov Scenario
Ntawv ci-raws li MAP yog siv rau roasted kas fes, cov txuj lom hauv av, txiv hmab txiv ntoo qhuav, txiv ntseej, mis mos, nqaij thiab cheese, npaj zaub mov, thiab tshuaj thiab khoom siv kho mob uas yuav tsum tsis muaj menyuam. Nws kuj tseem raug xaiv rau cov khoom xa tawm thoob plaws huab cua qhov twg qhov kub hloov pauv yuav txwv tsis pub ua rau hws thiab oxidation. Nyob rau hauv txhua rooj plaub, cov ntawv ci txheej ua haujlwm nrog cov roj sib tov kom tswj tau cov cua xav tau los ntawm cov kab ntim khoom rau cov neeg siv khoom.
Cov lus nug nquag
Cov tempers feem ntau yog O (annealed), H12 / H14 / H16 / H18 nrog lawv cov H2x sib npaug rau cov ntawv ua haujlwm, thiab H112 lossis F rau cov phaj tuab; lub temper yog xaiv los ntawm kev ua haujlwm thiab lub zog kawg yuav tsum tau ua.
EN 573-3 thiab ISO 209 txhais cov tshuaj muaj pes tsawg leeg, EN 485-2 cov khoom siv kho tshuab ntawm daim ntawv, GB / T 3880.2 Suav sib npaug, thiab ASTM B209 US cov qauv khoom.
Khaws qhuav thiab tawm hauv pem teb nrog kev tiv thaiv interleaving nyob rau hauv qhov chaw, khaws cov pob khoom sib cais los ntawm cov hlau thiab lwm yam hlau, thiab ua tib zoo saib xyuas kom qhov chaw tsis khawb los yog stains.
Yog lawm, tab sis weldability nyob ntawm tsev neeg hlau: 3xxx thiab 5xxx alloys weld nkag tau yooj yim, 6xxx alloys weld nrog lub zog zoo, thiab 1xxx ntshiab alloys weld yooj yim rau tsis yog - kev pabcuam.
Mill tiav yog tus qauv; ci, embossed, anodized thiab xim -coated finishes muaj rau architectural thiab zoo nkauj kev pab cuam, thiab cov tiav yog teev nyob rau hauv qhov kev txiav txim.
Cov ntawv feem ntau yog muab los ntawm 0.2 hli mus rau 6.0 hli thiab phaj los ntawm 6 hli nce siab, nrog cov coil dav ntawm 500 mm txog li 2000 mm nyob ntawm lub peev xwm zeb thiab kev txiav txim siab.
