Chikafu chakaomeswa nechando chinoreva chikafu chinogadziridzwa chikafu chakagadzirwa zvakanaka, chakaomeswa nechando patembiricha ye-30 ℃, uye inochengetwa nekutenderedzwa pa-18 ℃ kana kudzika mushure mekurongedza. Nekuda kwekushandiswa kwekudzikira kwekushisa kutonhora kwecheni kuchengetedza mukuita kwese, chikafu chakaomeswa chine hunhu hwehupenyu hurefu hwepasherufu, zvisiri nyore kushatisa uye nyore kudya, asi zvakare inoisa mberi matambudziko makuru uye epamusoro zvinodiwa zvekurongedza zvinhu.
Zvokudya zvekurongedzerwa zvakajairika nechando
Parizvino, the commonmabhegi ekurongedza chikafu muchandopamusika kazhinji vanotora zvinotevera zvinhu chimiro:
1.PET/PE
Ichi chimiro chinowanzojairika mukukurumidza-chando kurongedza chikafu, hunyoro-uchapupu, kutonhora kupikisa, yakaderera tembiricha yekuisa chisimbiso kuita kwakanaka, mutengo wakaderera.
2. BOPP/PE, BOPP/CPP
Rudzi urwu rwechimiro ndechehunyoro-huchapupu, husingatonhore, uye hune simba rakanyanya kusimba kune yakaderera-tembiricha yekuisa chisimbiso, zvichiita kuti ive inodhura-inoshanda. Pakati pavo, BOPP / PE chimiro chekurongedza mabhegi ane chitarisiko chiri nani uye kunzwa kupfuura PET / PE chimiro, chinogona kuvandudza chigadzirwa giredhi.
3. PET/VMPET/CPE, BOPP/VMPET/CPE
Nekuda kwekuvapo kwealuminium coating, rudzi urwu rwechimiro chine nzvimbo yakadhindwa zvinoyevedza, asi yakaderera-tembiricha yekudziya yekuisa chisimbiso kuita kushoma uye mutengo wayo wakakwirisa, zvichikonzera kuderera kwekushandisa.
4. NY/PE, PET/NY/LLDPE, PET/NY/AL/PE, NY/PE
Iko kurongedza kwerudzi urwu rwechimiro hachichinji nechando uye kukanganisa. Nekuda kwekuvapo kweiyo NY layer, ine yakanaka puncture kuramba, asi mutengo wakakwira. Inowanzo shandiswa kurongedza zvigadzirwa zvine mipendero kana huremu hunorema.
Pamusoro pezvo, kune imwe mhando yePE bhegi inowanzoshandiswa seyekunze yekurongedza bhegi yemiriwo uye yakaputirwa nechando chikafu.
In uyezve, kune iri nyore PE bhegi, rinowanzo shandiswa semuriwo, akareruka nechando mabhegi ekurongedza chikafu, nezvimwe.
Pamusoro pemabhegi ekurongedzerwa, chimwe chikafu chakaomeswa nechando chinoda kushandisa tireyi yepurasitiki, tireyi inonyanya kushandiswa ndeye PP, chikafu-giredhi PP hutsanana hwakanaka, inogona kushandiswa pa-30 ℃ yakaderera tembiricha, kune PET uye zvimwe zvinhu. Corrugated carton seyakajairwa yekufambisa kurongedza, kuvhunduka kwayo, kuramba kumanikidza uye mutengo wakanakira, ndiyo yekutanga kutariswa kwechando chekufambisa chekutakura zvinhu.
Zvinetso zviviri zvikuru hazvigoni kufuratirwa
1. kudya kuoma kushandiswa, kutonhora kunopisa chiitiko
Chengetedzo yakaomeswa nechando inogona kudzikisira zvakanyanya kukura uye kuberekana kweutachiona, kuderedza mwero wekuparara kwechikafu uye kuparara. Nekudaro, kune mamwe maitiro ekuchengetedza chando, kuomeswa uye oxidation chiitiko chechikafu chinozowedzera kuomarara nekuwedzera kwenguva yechando.
Mufiriza, pane kugoverwa kwekushisa uye mhute yemvura chikamu chekumanikidza: chikafu chekudya> chakatenderedza mhepo> inotonhorera. Kune rumwe rutivi, izvi ndezvokuti kupisa pamusoro pezvokudya kunotamirwa kumhepo yakapoteredza, kuwedzera kuderedza kupisa kwayo; Kune rumwe rutivi, kusiyanisa kudzvinyirirwa kwemhute yemvura pakati pechikafu chepamusoro uye mhepo yakapoteredza inogona kukurudzira kubuda uye sublimation yemvura uye makristasi echando panzvimbo yezvokudya mumhepo.
Panguva iyi, mhepo ine mhute yakawanda yemvura inobata kupisa, inoderedza kuwanda kwayo, uye inofamba ichienda kumhepo pamusoro pefiriji; Kana uchiyerera nemuinotonhodza, nekuda kwekunyanya kudzika kwetembiricha yeinotonhorera, mvura yakazara mvura patembiricha iyoyo zvakare yakadzikira. Mhepo painotonhodzwa, mhute yemvura inobata pamusoro peinotonhodza yoita chando, izvo zvinowedzera kuwanda kwemweya wakatonhodzwa uye kunyura uye kunosangana nechikafu zvakare. Iyi nzira icharamba ichidzokorora uye kutenderera, uye mvura iri pamusoro pezvokudya icharamba ichirasika, zvichiita kuti kuderera kwehuremu. Ichi chiitiko chinonzi "dry kushandiswa".
Munguva yekuenderera mberi kwekuomesa chiitiko, pamusoro pechikafu zvishoma nezvishoma ichava porous tishu, ichiwedzera nzvimbo yekusangana neokisijeni, ichimhanyisa oxidation yemafuta ekudya uye pigment, zvichikonzera browning pamusoro uye mapuroteni denaturation. Chiitiko ichi chinozivikanwa se "frozen burning".
Nekuda kwekufambiswa kwemhute yemvura uye oxidation reaction yeokisijeni mumhepo, zvinova zvikonzero zvakakosha zvezviitiko zviri pamusoro, mapurasitiki ekurongedza anoshandiswa mukati mekurongedza kwechikafu chakaoma nechando anofanirwa kuve nemhute yakanaka yemvura uye okisijeni inodzivirira zvinhu se chipingamupinyi pakati pezvokudya zvakaomeswa nechando nenyika yekunze.
2. Mhedzisiro Yenzvimbo Yekuchengetera Yakaoma Muchando paMechanical Simba rePackaging Materials.
Sezvinozivikanwa, mapurasitiki anova brittle uye anowanzo kuputika kana akaiswa kune yakaderera tembiricha kwenguva yakareba, zvichikonzera kuderera kwakanyanya kwezvinhu zvemuviri. Izvi zvinoratidza kushaya simba kwezvinhu zvepurasitiki mukusagadzikana kwechando. Kazhinji, kutonhora kunotonhora kwepurasitiki kunomiririrwa nekushisa kwe embrittlement. Sezvo tembiricha inodzikira, mapurasitiki anoita brittle uye anowanzo tyoka nekuda kwekudzikira kwekuita kwepolymer molecular cheni. Pasi pesimba rakatsanangurwa rekuita, 50% yemapurasitiki anotadza kutadza, uye tembiricha iyi ndiyo tembiricha ine brittle, inova ndiyo yakaderera muganho wetembiricha panogona kushandiswa zvinhu zvepurasitiki kazhinji. Kana zvinhu zvekurongedza zvinoshandiswa nechikafu chakaomeswa zviine kushomeka kwechando, kupinza kwakapinza kwechikafu chakaomeswa kunogona kubaya zviri nyore kurongedza panguva yekufambisa gare gare uye kurodha nekuburutsa, zvichikonzera matambudziko ekudonha uye kukurumidza kupera kwechikafu.
Solutions
Kuti uderedze kuwanda kwezvinhu zviviri zvikuru zvataurwa pamusoro uye kuve nechokwadi chekuchengetedzwa kwechikafu chakaoma muchando, zvinotevera zvinogona kutariswa.
1. Sarudza chipingamupinyi chakakwirira uye chepamusoro-simba remukati wekurongedza zvinhu
Kune zvakasiyana-siyana zvekurongedza zvinhu zvine maitiro akasiyana. Nekungonzwisisa zvimiro zvezvinhu zvakasiyana-siyana zvekurongedza tinogona kusarudza zvinhu zvine musoro zvinoenderana nezvinodiwa zvekuchengetedza chikafu chakaomeswa, kuitira kuti vakwanise kuchengetedza kunaka uye kunaka kwechikafu uye kuratidza kukosha kwechigadzirwa.
Parizvino,plastiki flexible packagingrinoshandiswa mumunda wechikafu chakaomeswa zvakanyanya kukamurwa kuva mapoka matatu:
Rudzi rwekutanga ndeye-single-layermabhegi ekurongedza, senge PE mabhegi, ane zvishoma zvipingamupinyi maitiro uye anowanzo shandiswakurongedza kwemuriwo, nezvimwewo;
Rudzi rwechipiri mubatanidzwa wakapfava epurasitiki ekurongedza mabhegi, ayo anoshandisa zvinonamira kubatanidza maviri kana anopfuura akaturikidzana epurasitiki firimu zvinhu pamwe chete, seOPP/LLDPE, NY/LLDPE, nezvimwewo, ine hunyoro hunodzivirira, kutonhora kupikisa, uye kupuncture kuramba. ;
Mhando yechitatu ndeye akawanda-layer co extruded akapfava epurasitiki ekurongedza mabhegi, ayo anonyunguduka nekuburitsa akasiyana anoshanda mambishi akadai sePA, PE, PP, PET, EVOH, nezvimwewo, uye ozvibatanidza mukufa kukuru. Vanofuridzirwa, vakawedzerwa, uye vanotonhodzwa pamwe chete. Rudzi urwu rwezvinhu harushandisi zvinonamira, uye rune hunhu hwekusvibiswa-isina, chivharo chepamusoro, simba rakakura, uye kuramba kutonhora kwepamusoro uye kwakaderera.
Dhata inoratidza kuti munyika dzakasimukira uye matunhu, kushandiswa kwemhando yechitatu yekurongedza kunokwana makumi mana muzana ezvese zvekudya zvakaomeswa nechando, nepo muChina inongoverengera inenge 6%, inoda kumwe kusimudzirwa.
Nekuenderera mberi kwekufambira mberi kwetekinoroji, zvinhu zvitsva zviri kubuda zvakare mushure meimwe, uye firimu rekurongedza rinodyiwa nderimwe revamiriri. Inoshandisa biodegradable polysaccharides, mapuroteni, kana lipids se substrate, uye inoumba firimu rekudzivirira pamusoro pechikafu chakaoma nechando nekuputira, kunyura, kupeta, kana kupfapfaidza, vachishandisa zvinhu zvinodyiwa zvakasikwa semidziyo yakabikwa uye kuburikidza nekupindirana kwemamolecular kudzora kutamisa mvura uye. kupindira kweokisijeni. Iyi firimu ine mhedziso yemvura yakajeka uye yakasimba gasi permeability kuramba. Kunyanya kukosha, inogona kudyiwa nechikafu chakaomeswa pasina kusvibiswa uye ine tarisiro yakakura yekushandisa.
2. Kuvandudza kutonhora kwekudzivirira uye simba remagetsi remukati wekurongedza zvinhu
Nzira 1:Sarudza inonzwisisika composite kana co extruded mbishi zvinhu.
Nylon, LLDPE, uye EVA ese ane yakanakisa yakadzika tembiricha kuramba, kubvarura kuramba, uye kukanganisa kupikisa. Kuwedzera zvinhu zvakasvibirira zvakadaro mumubatanidzwa kana co extrusion maitiro anogona kunyatso kuvandudza kusapinda kwemvura, gasi barriers, uye simba remagetsi rekutakura zvinhu.
Nzira 2:Wedzera chikamu cheplasticizers zvakakodzera.
Plasticizers anonyanya kushandiswa kuderedza zvisungo zvechipiri pakati pepolymer mamorekuru, nekudaro zvichiwedzera kufamba kwemapolymer molecular cheni uye kuderedza crystallinity. Izvi zvinoratidzwa nekuderera kwekuoma, modulus, uye brittleness tembiricha yepolymer, pamwe nekuwedzera kwekurebesa uye kuchinjika.
Simbisa kurongedza kuedza kuongorora
Packaging ine kukosha kukuru kune chikafu chakaomeswa nechando. Naizvozvo, nyika yakagadzira mazinga akakodzera uye mirau yakadai seSN/T0715-1997 "Yekuongorora Mitemo Yekutakura Packaging yeFrozen Chikafu Zvigadzirwa Zvekutengesa kunze". Nekumisa zvidiki zvinodikanwa zvekurongedza kuita zvinhu, kunaka kwemaitiro ese kubva pakurongedza raw material supply, kurongedza tekinoroji kusvika pakurongedza mhedzisiro inovimbiswa. Panyaya iyi, mabhizinesi anofanirwa kumisa rabhoritari yakazara yekurongedza mhando, ine makamuri matatu akasanganiswa block chimiro okisijeni / mvura mhute permeability tester, yakangwara yemagetsi tensile yekuyedza muchina, kadhibhodhi compression muchina uye zvimwe zviridzwa zvekuyedza, kuita nhevedzano yekuyedza bvunzo pa. chando chekurongedza zvinhu, zvinosanganisira zvipingamupinyi kuita, compressive kuita, puncture kuramba, kubvarura kuramba, uye kukanganisa kuramba.
Muchidimbu, kurongedza zvinhu zvechikafu chakaomeswa zvinotarisana nezvakawanda zvitsva uye matambudziko mukuita kwekunyorera. Kudzidza nekugadzirisa matambudziko aya kune rubatsiro rwakakura mukuvandudza kuchengetwa uye kutakurwa kwemhando yechikafu chakaomeswa nechando. Uye zvakare, kuvandudza iyo yekurongedza yekuongorora maitiro uye kumisikidza dhata sisitimu yekuyedza akasiyana ekutakura zvinhu zvinopawo hwaro hwekutsvagisa hwekusarudzwa kwezvinhu uye kutonga kwemhando.
Kana unayofrozenfoodpackagingzvinodiwa, unogona kutibata. Sezvo a flexible packaging mugadzirikweanopfuura makore makumi maviri, isu tinokupa yako chaiyo yekurongedza mhinduro zvinoenderana nechigadzirwa chako chinodiwa uye bhajeti.
Nguva yekutumira: Sep-27-2023
