Chakudya chozizira chimatanthawuza chakudya chomwe zopangira zakudya zoyenerera zimakonzedwa bwino, zowumitsidwa pa kutentha kwa -30 ℃, ndikusungidwa ndikuzunguliridwa pa-18 ℃ kapena kutsika pambuyo pakulongedza. Chifukwa chogwiritsa ntchito kutentha kochepa kosungirako kozizira panthawi yonseyi, chakudya chozizira chimakhala ndi moyo wautali wa alumali, osati zosavuta kuwononga komanso zosavuta kudya, komanso zimayika patsogolo zovuta zazikulu ndi zofunikira zapamwamba zazinthu zonyamula katundu.
Zida zomangirira zakudya zoziziritsidwa
Pakali pano, wambamatumba oyikamo zakudya oziziraPamsika nthawi zambiri amatengera zinthu zotsatirazi:
1.PET/PE
Kapangidwe kameneka kamakhala kofala muzosungirako chakudya chozizira msanga, umboni wa chinyezi, kukana kuzizira, kutentha kwapang'onopang'ono kusindikiza ntchito yabwino, mtengo wake ndi wotsika.
2. BOPP/PE, BOPP/CPP
Kapangidwe kameneka kamateteza chinyezi, kulimbana ndi kuzizira, ndipo kumakhala ndi mphamvu zolimba kwambiri zotsekera kutentha pang'ono, zomwe zimapangitsa kuti zikhale zotsika mtengo. Pakati pawo, matumba onyamula a BOPP/PE amakhala ndi mawonekedwe abwino komanso omveka kuposa mawonekedwe a PET / PE, omwe amatha kukweza kalasi yazinthu.
3. PET/VMPET/CPE, BOPP/VMPET/CPE
Chifukwa cha zokutira za aluminiyamu, kamangidwe kameneka kali ndi malo osindikizidwa bwino, koma ntchito yake yosindikiza kutentha pang'ono imakhala yochepa kwambiri ndipo mtengo wake ndi wokwera kwambiri, zomwe zimapangitsa kuti ntchito ikhale yochepa.
4. NY/PE, PET/NY/LLDPE, PET/NY/AL/PE, NY/PE
Kupaka kwa mtundu woterewu kumalimbana ndi kuzizira komanso kukhudzidwa. Chifukwa cha kukhalapo kwa NY wosanjikiza, ili ndi kukana kwabwino kwa puncture, koma mtengo wake ndi wokwera kwambiri. Nthawi zambiri amagwiritsidwa ntchito popanga zinthu zokhala ndi m'mphepete kapena zolemetsa zolemetsa.
Kuphatikiza apo, pali mtundu wina wa chikwama cha PE chomwe chimagwiritsidwa ntchito ngati thumba lakunja lazamasamba ndi zakudya zoziziritsa.
In Kuphatikiza apo, pali chikwama chosavuta cha PE, chomwe chimagwiritsidwa ntchito ngati ndiwo zamasamba, matumba onyamula zakudya ozizira, ndi zina zambiri.
Kuphatikiza pa matumba onyamula, zakudya zina zoziziritsa kukhosi zimafunika kugwiritsa ntchito thireyi ya pulasitiki, zinthu zomwe zimagwiritsidwa ntchito kwambiri ndi PP, ukhondo wa PP ndi wabwino, ukhoza kugwiritsidwa ntchito pa-30 ℃ kutentha kochepa, pali PET ndi zida zina. Makatoni okhala ndi malata ngati zonyamula zonyamula, kukana kwake kugwedezeka, kukana kukanikiza komanso ubwino wamtengo wapatali, ndiye kulingalira koyamba kwazinthu zonyamula zakudya zozizira.
Mavuto akulu awiri sangathe kunyalanyazidwa
1. chakudya youma mowa, kuzizira choyaka chodabwitsa
Kusungidwa kwachisanu kungathe kuchepetsa kukula ndi kubereka kwa tizilombo toyambitsa matenda, kuchepetsa kuchuluka kwa kuwonongeka kwa chakudya ndi kuwonongeka. Komabe, njira zina zosungiramo madzi oundana, kuyanika ndi kutulutsa makutidwe ndi okosijeni kwa chakudya kumakhalanso kovutirapo pakuwonjezera nthawi yozizira.
Mufiriji, pali kugawa kwa kutentha ndi mpweya wa madzi pang'ono kuthamanga: chakudya pamwamba> kuzungulira mpweya> ozizira. Kumbali imodzi, izi ndi chifukwa chakuti kutentha pamwamba pa chakudya kumasamutsidwa ku mpweya wozungulira, kumachepetsanso kutentha kwake; Kumbali inayi, kusiyana kwa mpweya wa madzi pakati pa chakudya ndi mpweya wozungulira kungathe kulimbikitsa kutuluka kwa madzi ndi kusungunula kwa madzi ndi madzi oundana pazakudya mlengalenga.
Panthawi imeneyi, mpweya wokhala ndi nthunzi wochuluka wa madzi umatenga kutentha, umachepetsa kachulukidwe kake, ndipo umapita kumlengalenga pamwamba pa mufiriji; Pamene mukuyenda m'malo ozizira, chifukwa cha kutentha kochepa kwambiri kwa chozizira, madzi odzaza madzi pa kutentha kumeneko amakhalanso otsika kwambiri. Mpweyawo ukazizira, nthunzi wa madziwo umafika pamwamba pa choziziriracho n’kusanduka chisanu, chimene chimawonjezera kuchulukira kwa mpweya woziziritsidwa ndi kumira n’kukhudzananso ndi chakudya. Njirayi idzapitirira kubwereza ndikuzungulira, ndipo madzi pamwamba pa chakudya adzapitirizabe kutayika, zomwe zimapangitsa kuchepa kwa kulemera. Chodabwitsa ichi chimatchedwa "dry consumption".
Pa mosalekeza ndondomeko kuyanika chodabwitsa, padziko chakudya pang`onopang`ono kukhala porous minofu, kuwonjezera kukhudzana m`dera ndi mpweya, imathandizira makutidwe ndi okosijeni wa chakudya mafuta ndi inki, kuchititsa browning padziko ndi mapuloteni denaturation. Chodabwitsa ichi chimadziwika kuti "kuwotcha kwachisanu".
Chifukwa cha kusamutsidwa kwa nthunzi wamadzi ndi kachitidwe ka okosijeni mumlengalenga, zomwe ndi zifukwa zazikulu za zochitika zomwe tazitchulazi, zida zopangira mapulasitiki zomwe zimagwiritsidwa ntchito popaka mkati mwa chakudya chozizira ziyenera kukhala ndi mpweya wabwino wamadzi komanso zotchinga mpweya monga chotchinga. chotchinga pakati pa chakudya chozizira ndi dziko lakunja.
2. Zotsatira za Malo Osungirako Ozizira pa Mphamvu Yamakina ya Zida Zopaka
Monga momwe zimadziwika bwino, mapulasitiki amakhala osasunthika komanso amatha kusweka akakhala ndi kutentha pang'ono kwa nthawi yayitali, zomwe zimapangitsa kuchepa kwakukulu kwa zinthu zakuthupi. Izi zikuwonetsa kufooka kwa zida zapulasitiki pakukana kozizira kozizira. Kawirikawiri, kukana kozizira kwa mapulasitiki kumayimiridwa ndi kutentha kwa embrittlement. Kutentha kumachepa, mapulasitiki amakhala osasunthika komanso amatha kusweka chifukwa cha kuchepa kwa unyolo wa ma polima awo. Pansi pa mphamvu zomwe zakhudzidwa, 50% ya mapulasitiki amalephera kulephera, ndipo kutentha uku ndi kutentha kwamphamvu, komwe ndi malire otsika a kutentha komwe zida zapulasitiki zingagwiritsidwe ntchito nthawi zonse. Ngati zotengera zomwe zimagwiritsidwa ntchito pazakudya zowundana sizimazizira bwino, zomangira zakuthwa za chakudya chowumitsidwa zimatha kubowola paketiyo pakapita nthawi yoyendetsa ndikutsitsa ndikutsitsa, zomwe zimayambitsa kutayikira komanso kuthamangitsa chakudya.
Zothetsera
Pofuna kuchepetsa kuchulukirachulukira kwa zinthu ziwiri zazikuluzikulu zomwe tazitchula pamwambapa ndikuwonetsetsa chitetezo cha chakudya chozizira, zinthu zotsatirazi zitha kuganiziridwa.
1. Sankhani chotchinga chachikulu ndi zida zomangira zamphamvu zamkati
Pali mitundu yosiyanasiyana ya ma CD okhala ndi zinthu zosiyanasiyana. Pokhapokha pomvetsetsa mawonekedwe azinthu zosiyanasiyana zomangirira tingathe kusankha zida zoyenera kutengera zomwe zimatetezedwa ndi chakudya chozizira, kuti athe kusunga kukoma ndi mtundu wa chakudya ndikuwonetsa mtengo wazinthuzo.
Pakadali pano,pulasitiki flexible phukusiamagwiritsidwa ntchito m'munda wa chakudya chozizira kwambiri amagawidwa m'magulu atatu:
Mtundu woyamba ndi wosanjikiza umodzimatumba onyamula, monga matumba a PE, omwe ali ndi zotchinga zochepa ndipo amagwiritsidwa ntchito kwambirima CD masambandi zina;
Mtundu wachiwiri ndi matumba apulasitiki ofewa ophatikizika, omwe amagwiritsa ntchito zomatira kuti amangirire zigawo ziwiri kapena zingapo zazinthu zamapulasitiki apulasitiki palimodzi, monga OPP/LLDPE, NY/LLDPE, ndi zina zotero, zokhala ndi chinyezi chabwino, kukana kuzizira, komanso kukana kuphulika. ;
Mtundu wachitatu ndi multi-wosanjikiza co extruded zofewa matumba ma CD matumba, amene amasungunula ndi extrude ntchito zosiyanasiyana zopangira monga PA, PE, PP, PET, EVOH, etc., ndi kuphatikiza iwo mu kufa chachikulu. Amawombedwa, kukulitsidwa, ndi kuziziritsidwa pamodzi. Mtundu uwu wa zinthu sagwiritsa ntchito zomatira, ndipo uli ndi makhalidwe osakhala oipitsidwa, chotchinga chachikulu, mphamvu zambiri, ndi kukana kutentha kwakukulu ndi kutsika.
Deta ikuwonetsa kuti m'maiko otukuka komanso madera, kugwiritsa ntchito mtundu wachitatu wa ma CD kumakhala pafupifupi 40% yazakudya zonse zozizira, pomwe ku China zimangokhala pafupifupi 6%, zomwe zimafunikira kukwezedwa kwina.
Ndi kupita patsogolo kosalekeza kwaukadaulo, zida zatsopano zikuwonekeranso chimodzi pambuyo pa chimzake, ndipo filimu yodyera yonyamula ndi m'modzi mwa oyimira. Amagwiritsa ntchito ma polysaccharides, mapuloteni, kapena lipids ngati gawo lapansi, ndikupanga filimu yoteteza pamwamba pa chakudya chozizira pokulunga, kuthira, kupaka, kapena kupopera mbewu mankhwalawa, pogwiritsa ntchito zinthu zachilengedwe zodyedwa monga zopangira komanso kudzera muzochita zama cell kuti ziwongolere kusamutsa ndi madzi. kulowetsedwa kwa oxygen. Kanemayu ali ndi kukana kwamadzi kodziwikiratu komanso kukana kwamphamvu kwa gasi. Chofunika kwambiri, chitha kudyedwa ndi chakudya chozizira popanda kuipitsa ndipo chimakhala ndi chiyembekezo chogwiritsa ntchito.
2. Kupititsa patsogolo kukana kuzizira ndi mphamvu zamakina zamkati mwazinthu zopangira ma CD
Njira 1:Sankhani wololera kompositi kapena co extruded zopangira.
Nylon, LLDPE, ndi EVA onse ali ndi kukana kutentha kwambiri, kukana misozi, komanso kukana mphamvu. Kuonjezera zopangira zotere mumagulu ophatikizika kapena ma co extrusion kumatha kupititsa patsogolo chitetezo chamadzi, chotchinga mpweya, komanso mphamvu zamakina zamapaketi.
Njira 2:Wonjezerani kuchuluka kwa ma plasticizer moyenera.
Mapulasitiki amagwiritsidwa ntchito kwambiri kufooketsa zomangira zachiwiri pakati pa mamolekyu a polima, potero amawonjezera kuyenda kwa unyolo wa ma polima a cell ndikuchepetsa crystallinity. Izi zimawonetseredwa ndi kuchepa kwa kuuma, modulus, ndi kutentha kwa brittleness ya polima, komanso kuwonjezeka kwa kutalika ndi kusinthasintha.
Limbikitsani ntchito zoyendera zonyamula katundu
Kupaka ndikofunika kwambiri pazakudya zachisanu. Chifukwa chake, dzikolo lapanga miyezo ndi malamulo oyenera monga SN/T0715-1997 "Mayendetsedwe Oyang'anira Zoyendetsa Packaging ya Frozen Food Products for Export". Pakukhazikitsa zofunika zochepa pakulongedza zinthu, mtundu wanjira yonse kuyambira pakupakira zinthu zopangira, ukadaulo wazolongedza mpaka pakunyamula zimatsimikizika. Pachifukwa ichi, mabizinesi akuyenera kukhazikitsa labotale yodziyimira pawokha, yokhala ndi zipinda zitatu zophatikizika zoyesa mpweya / mpweya wamadzi, makina oyesera anzeru amagetsi, makina osindikizira a makatoni ndi zida zina zoyesera, kuti ayese mayeso angapo. Zida zomangirira zozizira, kuphatikiza zotchinga, magwiridwe antchito, kukana nkhonya, kukana misozi, ndi kukana kukhudzidwa.
Mwachidule, zida zonyamula zakudya zozizira zimakumana ndi zovuta zambiri komanso zovuta pakufunsira. Kuwerenga ndi kuthetsa mavutowa ndikopindulitsa kwambiri kuwongolera kasungidwe ndi kayendedwe ka chakudya chozizira. Kuphatikiza apo, kuwongolera njira yoyendera ma phukusi ndikukhazikitsa dongosolo la data poyesa zida zosiyanasiyana zopakira kudzaperekanso maziko ofufuzira pakusankha zinthu zam'tsogolo ndikuwongolera zabwino.
Ngati muli nazofrozenfuwupackagingzofunikira, mutha kulumikizana nafe. Monga a flexible ma CD wopangakwa zaka zopitilira 20, tidzakupatsirani mayankho anu oyenera malinga ndi zosowa zanu ndi bajeti.
Nthawi yotumiza: Sep-27-2023
