Cov khoom noj khov yog hais txog cov khoom noj uas tsim nyog cov khoom siv raw khoom tau ua kom zoo, khov ntawm qhov kub ntawm-30 ℃, thiab khaws cia thiab nthuav dav ntawm -18 ℃ lossis qis dua tom qab ntim. Vim yog siv cov khoom siv txias txias txias cia rau hauv tag nrho cov txheej txheem, cov khoom noj khov khov muaj cov yam ntxwv ntawm lub neej txee ntev, tsis yooj yim rau corrupt thiab noj tau yooj yim, tab sis nws kuj ua rau muaj kev sib tw ntau dua thiab ntau dua rau cov khoom ntim khoom.
Cov khoom ntim khoom noj khoom haus khov
Tam sim no, qhov sib txawvkhov zaub mov ntim hnabnyob rau hauv kev ua lag luam feem ntau txais yuav cov khoom siv hauv qab no:
1. PET/PE
Cov qauv no feem ntau tshwm sim hauv cov ntim khoom noj ceev ceev, noo noo-pov thawj, tiv thaiv txias, tsis tshua muaj kub kub sealing kev ua tau zoo, tus nqi kuj tsawg.
2. BOPP/PE, BOPP/CPP
Cov qauv no yog dej-pov thawj, tiv taus txias, thiab muaj zog tensile siab rau qhov kub thiab txias sealing, ua rau nws tus nqi zoo. Ntawm lawv, BOPP / PE qauv ntim hnab muaj qhov zoo nkauj thiab zoo li tus qauv PET / PE, uas tuaj yeem txhim kho cov khoom qib.
3. PET/VMPET/CPE, BOPP/VMPET/CPE
Vim tias muaj cov txheej txheem aluminium, hom qauv no muaj qhov zoo nkauj zoo nkauj, tab sis nws qhov kub thiab txias sealing kev ua tau zoo yog me ntsis tsis zoo thiab nws cov nqi kuj yog siab, ua rau tus nqi siv tsawg.
4. NY/PE, PET/NY/LLDPE, PET/NY/AL/PE, NY/PE
Lub ntim ntawm hom qauv no yog resistant rau khov thiab cuam tshuam. Vim lub xub ntiag ntawm NY txheej, nws muaj qhov zoo puncture tsis kam, tab sis tus nqi kuj siab. Nws feem ntau yog siv rau cov khoom ntim khoom nrog cov npoo los yog hnyav hnyav.
Tsis tas li ntawd, muaj lwm hom PE hnab uas feem ntau siv los ua ib lub hnab ntim sab nraud rau zaub thiab ntim khoom noj khov.
In ntxiv, muaj ib lub hnab PE yooj yooj yim, feem ntau yog siv los ua zaub, cov hnab ntim khoom noj khov yooj yim, thiab lwm yam.
Ntxiv nrog rau cov hnab ntim khoom, qee cov khoom noj khov yuav tsum tau siv cov tais yas, cov khoom siv feem ntau yog PP, cov khoom noj khoom haus-qib PP yog qhov zoo, siv tau ntawm -30 ℃ qis kub, muaj PET thiab lwm yam khoom siv. Corrugated carton raws li kev thauj mus los dav dav, nws qhov kev poob siab tsis kam, siab tsis kam thiab tus nqi zoo, yog thawj qhov kev txiav txim siab ntawm cov khoom noj khov thauj khoom ntim khoom.
Ob qhov teeb meem loj tsis tuaj yeem tsis quav ntsej
1. cov khoom noj qhuav noj, khov hlawv tshwm sim
Frozen cia tuaj yeem txwv txoj kev loj hlob thiab kev loj hlob ntawm cov kab mob me me, txo tus nqi ntawm cov zaub mov thiab lwj. Txawm li cas los xij, rau qee cov txheej txheem khov khov, qhov ziab thiab oxidation tshwm sim ntawm cov khoom noj kuj tseem yuav hnyav dua nrog rau ncua sij hawm khov.
Nyob rau hauv lub freezer, muaj ib tug faib ntawm kub thiab dej vapor ib nrab siab: zaub mov nto> ib puag ncig cua> txias. Ntawm qhov tod tes, qhov no yog vim qhov kub ntawm qhov chaw ntawm cov zaub mov raug xa mus rau cov huab cua ib puag ncig, ntxiv txo nws tus kheej kub; Ntawm qhov tod tes, qhov sib txawv ntawm cov dej vapor ntawm cov khoom noj khoom haus thiab cov huab cua nyob ib puag ncig tuaj yeem txhawb nqa cov evaporation thiab sublimation ntawm cov dej thiab cov dej khov rau ntawm cov khoom noj rau saum huab cua.
Nyob rau lub sijhawm no, cov huab cua uas muaj dej ntau dua nqus cua sov, txo nws qhov ntom, thiab txav mus rau saum huab cua saum lub freezer; Thaum ntws los ntawm lub txias txias, vim qhov kub tsis tshua muaj siab ntawm lub txias txias, cov dej saturated ntawm qhov kub thiab txias kuj tseem qis heev. Raws li cov huab cua txias, cov dej vapor hu rau saum npoo ntawm qhov txias thiab condenses rau hauv Frost, uas ua rau kom qhov ntom ntawm cov cua txias thiab cov dab dej thiab tuaj rau hauv kev sib cuag nrog zaub mov dua. Cov txheej txheem no yuav rov ua dua thiab rov ua dua, thiab cov dej ntawm qhov chaw ntawm cov khoom noj yuav ploj mus ntxiv, ua rau qhov hnyav dua. Qhov tshwm sim no hu ua "kev siv qhuav".
Thaum lub sij hawm tas mus li txheej txheem ntawm ziab, qhov saum npoo ntawm cov khoom noj yuav maj mam dhau los ua cov ntaub so ntswg, ua rau thaj chaw sib cuag nrog cov pa oxygen, ua kom cov oxidation ntawm cov zaub mov muaj roj thiab cov pigments, ua rau browning ntawm qhov chaw thiab protein denaturation. Qhov no tshwm sim yog hu ua "kub kub".
Vim qhov hloov pauv ntawm cov dej vapor thiab cov tshuaj tiv thaiv oxidation ntawm cov pa oxygen hauv huab cua, uas yog cov laj thawj tseem ceeb rau cov xwm txheej saum toj no, cov khoom ntim yas siv rau hauv cov ntim ntim khoom noj khov yuav tsum muaj cov dej vapor zoo thiab cov pa oxygen barrier. barrier ntawm cov khoom noj khov thiab lub ntiaj teb sab nraud.
2. Qhov cuam tshuam ntawm Frozen Storage Ib puag ncig ntawm kev siv tshuab muaj zog ntawm cov khoom ntim
Raws li paub zoo, plastics ua nkig thiab ua rau tawg thaum raug kub qis rau lub sijhawm ntev, ua rau muaj kev poob qis hauv lub cev. Qhov no qhia txog qhov tsis muaj zog ntawm cov ntaub ntawv yas hauv kev ua haujlwm txias tsis zoo. Feem ntau, qhov txias tsis kam ntawm plastics yog sawv cev los ntawm embrittlement kub. Raws li qhov kub thiab txias, plastics ua nkig thiab ua rau tawg vim qhov txo qis hauv lawv cov khoom siv polymer molecular chains. Raws li qhov tshwj xeeb cuam tshuam lub zog, 50% ntawm cov yas tau ua tsis tiav, thiab qhov ntsuas kub no yog qhov kub thiab txias, uas yog qhov qis qis ntawm qhov kub ntawm cov khoom siv yas tuaj yeem siv tau ib txwm. Yog tias cov khoom ntim khoom siv rau cov khoom noj khov muaj qhov tsis zoo rau qhov txias txias, cov khoom noj khoom haus khov tuaj yeem yooj yim puncture lub ntim thaum thauj mus los tom qab thiab thauj khoom thiab thauj khoom, ua rau muaj teeb meem xau thiab ua rau cov khoom noj khoom noj sai sai.
Kev daws teeb meem
Txhawm rau txo qhov zaus ntawm ob qhov teeb meem loj uas tau hais los saum toj no thiab ua kom muaj kev nyab xeeb ntawm cov khoom noj khov, cov hauv qab no tuaj yeem xav txog.
1. Xaiv cov khoom thaiv siab thiab lub zog siab hauv cov khoom ntim khoom
Muaj ntau yam khoom ntim nrog cov khoom sib txawv. Tsuas yog los ntawm kev nkag siab txog lub cev ntawm ntau cov khoom ntim khoom tuaj yeem xaiv cov khoom tsim nyog raws li kev tiv thaiv cov khoom noj khov, kom lawv tuaj yeem tswj tau qhov tsw thiab zoo ntawm cov khoom noj thiab cuam tshuam tus nqi ntawm cov khoom.
Tam sim no,yas hloov tau ntimsiv nyob rau hauv daim teb ntawm cov khoom noj khov yog muab faib ua peb pawg:
Thawj hom yog ib txheejntim hnab, xws li PE hnab, uas muaj qhov cuam tshuam tsis zoo thiab feem ntau siv rauzaub ntim, thiab lwm yam;
Hom thib ob yog cov hnab ntim cov hnab yas sib xyaw, uas siv cov nplaum nplaum rau ob lossis ntau txheej ntawm cov ntaub ntawv yas yeeb yaj kiab ua ke, xws li OPP / LLDPE, NY / LLDPE, thiab lwm yam, nrog cov dej noo zoo, tiv taus txias, thiab puncture tsis kam. ;
Qhov thib peb yog ntau txheej co extruded mos yas ntim hnab, uas yaj thiab extrude sib txawv ua hauj lwm raw cov ntaub ntawv xws li PA, PE, PP, PET, EVOH, thiab lwm yam., thiab merge lawv nyob rau hauv lub ntsiab tuag. Lawv raug tshuab, nthuav dav, thiab txias ua ke. Cov khoom siv no tsis siv cov nplaum nplaum, thiab muaj cov yam ntxwv tsis muaj kuab lom, muaj kev tiv thaiv siab, siab zog, thiab tiv taus qhov kub thiab txias.
Cov ntaub ntawv qhia tau hais tias nyob rau hauv cov teb chaws tsim thiab cheeb tsam, kev siv hom thib peb ntawm cov ntim nyiaj li ntawm 40% ntawm tag nrho cov ntim khoom noj khov, thaum nyob hauv Suav teb tsuas yog suav txog li 6%, uas xav tau kev txhawb nqa ntxiv.
Nrog kev nce qib ntawm kev siv thev naus laus zis, cov ntaub ntawv tshiab kuj tau tshwm sim ib qho tom qab, thiab cov khoom ntim khoom noj tau yog ib qho ntawm cov neeg sawv cev. Nws siv biodegradable polysaccharides, proteins, los yog lipids ua lub substrate, thiab tsim ib tug tiv thaiv zaj duab xis nyob rau saum npoo ntawm cov khoom noj khov los ntawm qhwv, soaking, txheej, los yog tshuaj tsuag, siv tej yam ntuj tso khoom noj raws li raw cov ntaub ntawv thiab los ntawm intermolecular kev sib cuam tshuam los tswj dej hloov thiab oxygen permeation. Cov yeeb yaj kiab no tau pom tseeb dej tsis kam thiab muaj zog roj permeability tsis kam. Qhov tseem ceeb tshaj plaws, nws tuaj yeem noj nrog cov zaub mov khov yam tsis muaj kuab paug thiab muaj kev siv dav dav.
2. Txhim kho qhov txias tsis kam thiab kev siv lub zog ntawm cov khoom ntim sab hauv
Txoj Kev 1:Xaiv cov khoom tsim nyog los yog co extruded raw khoom.
Nylon, LLDPE, thiab EVA txhua tus muaj qhov kub thiab txias tsis kam, tsim kua muag tsis kam, thiab kev cuam tshuam. Ntxiv cov khoom siv raw hauv cov txheej txheem sib xyaw lossis co extrusion tuaj yeem txhim kho cov dej tsis zoo, roj teeb, thiab lub zog txhua yam ntawm cov khoom ntim.
Txoj Kev 2:Ua kom qhov kev faib ua feem ntawm plasticizers kom tsim nyog.
Plasticizers feem ntau yog siv los ua kom tsis muaj zog ntawm cov ntawv cog lus thib ob ntawm polymer molecules, yog li ua kom muaj kev txav mus los ntawm polymer molecular chains thiab txo cov crystallinity. Qhov no yog manifested los ntawm ib tug txo nyob rau hauv hardness, modulus, thiab brittleness kub ntawm lub polymer, nrog rau ib tug nce nyob rau hauv elongation thiab yooj.
Ntxiv dag zog rau kev tshuaj xyuas ntim khoom
Kev ntim khoom yog qhov tseem ceeb heev rau cov khoom noj khov. Yog li ntawd, lub teb chaws tau tsim cov qauv tsim thiab cov kev cai xws li SN / T0715-1997 "Kev Tshuaj Xyuas Kev Nyab Xeeb rau Kev Thauj Khoom Ntim Khoom Noj Khoom Noj Khoom Haus rau Export". Los ntawm kev teeb tsa yam tsawg kawg nkaus rau kev ntim khoom, qhov zoo ntawm tag nrho cov txheej txheem los ntawm kev ntim khoom raw khoom, ntim tshuab rau ntim cov nyhuv yog lav. Hauv qhov no, cov tuam txhab lag luam yuav tsum tsim kom muaj kev tswj hwm kev ntim khoom zoo, nruab nrog peb lub chamber integrated block qauv oxygen / dej vapor permeability tester, ntse hluav taws xob tensile kuaj tshuab, cardboard compression tshuab thiab lwm yam kev ntsuas ntsuas, los ua cov kev xeem ntsuas ntawm Cov khoom ntim khov, nrog rau kev ua haujlwm tsis zoo, kev ua haujlwm siab, kev sib tsoo, kev tsim kua muag, thiab kev cuam tshuam.
Hauv cov ntsiab lus, cov khoom ntim rau cov khoom noj khov muaj ntau yam kev xav tau tshiab thiab teeb meem hauv cov txheej txheem thov. Kawm thiab daws cov teeb meem no muaj txiaj ntsig zoo rau kev txhim kho kev khaws cia thiab kev thauj mus los zoo ntawm cov zaub mov khov. Tsis tas li ntawd, kev txhim kho cov txheej txheem tshuaj xyuas cov ntim khoom thiab tsim kom muaj cov ntaub ntawv rau kev sim ntau yam ntaub ntawv ntim khoom kuj tseem yuav muab kev tshawb fawb hauv paus rau kev xaiv cov khoom siv yav tom ntej thiab kev tswj kom zoo.
Yog tias koj muajfrozenfua oodpackagingcov kev xav tau, koj tuaj yeem tiv tauj peb. Raws li ib tug saj zawg zog ntim manufacturersrau ntau tshaj 20 xyoo, peb yuav muab koj cov kev daws teeb meem raws li koj cov khoom xav tau thiab pob nyiaj siv.
Post lub sij hawm: Sep-27-2023
