Nchifukwa chiyani Mapaketi a Chakudya Akuchoka ku Matumba Opaka Mafuta Kupita ku Mapaketi Opanda Zosungunulira Zosiyanasiyana?
Mu makampani opanga chakudya, njira yopangira mafuta ouma—yomwe imagwirizanitsa zipangizo zosiyanasiyana za filimu pogwiritsa ntchito zomatira zopangidwa ndi zosungunulira—yakhala njira yodziwika bwino yopangira mafuta osinthika. Komabe, pamene malamulo oteteza chakudya akukulirakulira, mfundo zachilengedwe zikupitirirabe kukhwima, ndipo opanga akuyesetsa kupanga bwino kwambiri, makampani ambiri azakudya akutembenukira ku mitundu yambiri. ukadaulo wophatikizana, njira yothetsera ma phukusi yopanda zosungunulira.
Kusintha kumeneku sikuli mwangozi. Kumayimira yankho losapeŵeka chifukwa cha mavuto onse okhudzana ndi chitetezo cha chakudya, kutsata malamulo okhudza chilengedwe, komanso kugwira ntchito bwino popanga zinthu.
1. Zoopsa Zobisika za Matumba Achikhalidwe Opaka Laminated: Zotsalira Zosungunulira ndi Nkhawa Zokhudza Chitetezo cha Chakudya
Nkhawa yaikulu yokhudzana ndi chitetezo cha chakudya chopangidwa ndi laminated imachokera ku njira yopangira chakudyacho.
Kupaka utoto wouma mwachikhalidwe kumadalira zomatira zochokera ku zosungunulira kuti zigwirizane zigawo zosiyanasiyana za zinthu. Pakusindikiza ndi kupaka utoto, zosungunulira zachilengedwe zomwe zili mu inki yosindikizira ndi zomatira sizingasweke kwathunthu, zomwe zimasiya zosungunulira zotsalira mkati mwa zinthu zomangira zomalizidwa.
Malinga ndi deta yoyesera mafakitale, zotsalira zosungunulira mu laminated ma CD mafilimu Makamaka zimachokera ku inki zosindikizira ndi zomatira. Zofunikira pa kukonza zinthu—kuphatikizapo liwiro losindikiza, kutentha kouma, kuyenda kwa mpweya, ndi kuchuluka kwa zomatira—zimakhudza mwachindunji mulingo womaliza wa zotsalira zosungunulira.
Muyezo wa dziko lonse wa GB/T 10004-2008 wa ku China umafotokoza momveka bwino kuti zotsalira zonse za solvent siziyenera kupitirira 5.0 mg/m², ndipo mankhwala a benzene sayenera kuzindikirika.
Komabe, popanga zinthu zenizeni, opanga ma CD ambiri okhala ndi laminated ndi makampani ang'onoang'ono kapena apakatikati omwe ali ndi mphamvu zosiyanasiyana zopangira, zomwe zimapangitsa kuti zotsalira zambiri za solvent zikhale zovuta kwambiri m'makampani. Kuwunika kwaposachedwa kwa msika kwapeza zinthu zosatsatira malamulo zomwe zili ndi zotsalira zambiri za solvent komanso kusamuka kwakukulu kwa ma primary aromatic amines (PAAs), zomwe zonsezi ndi zizindikiro zofunika kwambiri za chitetezo cha chakudya.
Kupatula zotsalira za solvent, kusamuka kwa primary aromatic amine (PAA) kwakhala vuto lina lalikulu.
Ma PAA amachokera makamaka ku zomatira za polyurethane, ndipo ma amine ena onunkhira amaonedwa kuti ndi omwe angayambitse khansa komanso kusintha kwa chilengedwe. Chifukwa chake, amalamulidwa mosamala ndi malamulo onse aku Europe ndi ku China okhudzana ndi chakudya. Pamene miyezo yatsopano yovomerezeka ikupitilira kugwira ntchito, opanga ma CD a chakudya akugogomezera kwambiri kuwongolera kusamuka kwa PAA, zomwe zikupangitsa kuti msika ukhale ndi kufunikira kwakukulu kwa njira zopakira zopanda zosungunulira.
2. Kutulutsa Zinthu Zosiyanasiyana: Kuchotsa Zoopsa Zachitetezo Pachitsime
Ukadaulo wophatikizana ndi multilayer zimasiyana kwambiri ndi lamination youma yachikhalidwe.
M'malo mogwirizanitsa mafilimu opangidwa kale, ma extruder angapo nthawi imodzi amasungunula ma polymer resins osiyanasiyana ndikuwapatsa die imodzi, komwe amatulutsidwa pamodzi kukhala kapangidwe kogwirizana ka multilayer kudzera mu filimu yophulika kapena kukonza filimu yopangidwa.
Ubwino waukulu wa njirayi ndi wakuti palibe zomatira kapena zosungunulira zachilengedwe zomwe zimafunika panthawi yonse yopangira.
Zotsatira zake, mpweya wa VOC umachotsedwa pamalo omwe umachokera, ndipo palibe chiopsezo cha zosungunulira zachilengedwe zotsalira mkati mwa zinthu zopakira.
Zigawo zosiyanasiyana zimagwirizanitsidwa pamodzi pogwiritsa ntchito kutentha pamene zili mu mkhalidwe wosungunuka, zomwe zimathandiza mamolekyu a polima kulowa mkati mwa malo olumikizirana. Kulumikizana kwa mamolekyu kumeneku kumapangitsa kuti pakhale kugwirizana kwamphamvu kwambiri pakati pa zigawo kuposa kuuma kwachizolowezi.
Kuyesa kwa mafakitale kukuwonetsa kuti mphamvu ya peel ya interlayer ya mafilimu opangidwa ndi anthu ena Kawirikawiri zimaposa 3 N/15 mm, ndipo nthawi zambiri, zigawo sizingalekanitsidwe popanda kuwononga filimuyo yokha. Mosiyana ndi mapangidwe a guluu, mafilimu opangidwa ndi guluu sangawonongeke chifukwa cha kukalamba kapena kusamuka kwa guluu.
Pakuyika chakudya, kapangidwe kopanda zosungunulira komanso kopanda zomatira kumatanthauza kuti chakudya chili bwino. Filimuyi ndi yopanda fungo, ilibe zotsalira zosungunulira zovulaza, ndipo ndi yoyenera kwambiri pakuyika chakudya ndi mankhwala komwe kuwongolera fungo ndi kusamuka ndikofunikira kwambiri.
3. Ubwino wa Kupanga Bwino ndi Mtengo
Kuwonjezera pa chitetezo chowonjezereka, multilayer co-extrusion imaperekanso ubwino waukulu pakupanga bwino komanso ndalama zonse zopangira.
Kuyerekeza kusintha kwa ma CD osinthasintha ukadaulo ukuwonetsa kusiyana kumeneku momveka bwino.
Kupaka utoto wouma wachikhalidwe ndi njira yokhwima yopangira zinthu, koma imakhala ndi zoopsa zokhudzana ndi zotsalira zosungunulira, kugwiritsa ntchito mphamvu zambiri, komanso liwiro lopanga pang'onopang'ono.
Kupaka mafuta kopanda zosungunulira kumathetsa mavuto a zotsalira za zosungunulira pogwiritsa ntchito zomatira zolimba 100% m'malo mwa zomatira zopangidwa ndi zosungunulira. Komabe, kumafuna zida zapamwamba kwambiri, ndalama zambiri zoyambira, ndipo kumatha kusinthasintha kwa coefficient of friction popaka mafuta a polyethylene (PE) chifukwa cha kusuntha kwa zowonjezera, zomwe zimawonjezera zovuta zowongolera njira.
Mosiyana ndi zimenezi, multilayer co-extrusion imaphatikiza kupanga kopanda zosungunulira, kupanga bwino kwambiri, komanso kugwirizana kwabwino kwa interlayer, zomwe zimapangitsa kuti ikhale yoyenera kwambiri popanga ma CD akuluakulu a chakudya.
Poganizira za ndalama zomwe zimagwiritsidwa ntchito pa zipangizo, kuchotsera zinthu pamodzi kumachotsa magawo angapo opangira zinthu, kuphatikizapo kugwiritsa ntchito zomatira, kuumitsa, ndi kuyeretsa. Zotsatira zake, ndalama zonse zopangira nthawi zambiri zimakhala zochepa kuposa za mafilimu ouma okhala ndi laminated omwe amapereka magwiridwe ofanana.
Komanso, mafilimu opangidwa ndi anthu ena Zingapangidwe mosinthasintha ndi mapangidwe a zigawo zitatu, zisanu, zisanu, kapena zisanu ndi zinayi, ndi zigawo zogwirira ntchito zoonda ngati ma microns 2-3. Zipangizo zotchinga zamtengo wapatali monga EVOH ndi PA (polyamide) zimatha kuyikidwa ngati zigawo zoonda kwambiri, zomwe zimachepetsa kwambiri kugwiritsa ntchito zipangizo zokwera mtengo.
4. Kutsatira Malamulo a Zachilengedwe: Kuchokera pa Ubwino Wopikisana mpaka pa Zofunikira pa Msika
Ndi kukhazikitsidwa kwa lamulo la European Union’s Packaging and Packaging Waste Regulation (PPWR) ndi njira zomwe China ikupitilira kutsata pankhani yokhudza kusagwirizana ndi mpweya woipa, kutsatira malamulo okhudza chilengedwe kwasintha kuchoka pa kukhala phindu lowonjezera kupita ku kukhala lamulo lofunikira pamsika.
Magulu omatira okhala ndi zosungunulira omwe amagwiritsidwa ntchito popaka utoto wouma ndi amodzi mwa magwero akuluakulu a mpweya woipa wa volatile organic compound (VOC).
Malinga ndi deta yamakampani, kuchuluka kwa kugwiritsa ntchito lamination yopanda zosungunulira pamizere yopanga chakudya kunakwera kuchoka pa 38% mu 2020 kufika pa 72% mu 2025.
Buku Lothandiza la China lotchedwa Volatile Organic Compound (VOC) Control limalimbikitsa kuti njira yosinthira lamination youma yachikhalidwe ikhale yosiyana ndi njira zoyeretsera zopanda solvent kapena njira zoyeretsera lamination, ndipo njira zoyeretsera lamination zokhala ndi zigawo zambiri zimawonedwa ngati imodzi mwa njira zamakono zomwe zimakondedwa.
Ubwino wina wofunikira pa chilengedwe wa mafilimu opangidwa ndi zinthu zosiyanasiyana ndi woti akhoza kubwezeretsedwanso.
Mapaketi achikhalidwe okhala ndi laminated nthawi zambiri amaphatikiza zinthu zosiyanasiyana—monga mapulasitiki, zojambulazo za aluminiyamu, ndi mapepala—pogwiritsa ntchito zomatira, zomwe zimapangitsa kuti kubwezeretsanso zinthuzo ndi kulekanitsa zinthuzo zikhale zovuta kwambiri.
Mosiyana ndi zimenezi, mafilimu opangidwa ndi anthu ena Zitha kupangidwa ngati zomangira za polyolefin mono-material zonse, zomwe zimathandiza kuti kubwezeretsanso ndi kukonzanso zinthu zikhale zosavuta kwambiri mutagwiritsa ntchito.
Malinga ndi deta yochokera ku China Packaging Federation, ma CD okhala ndi zinthu ziwiri okha ndiwo anali pafupifupi 10% ya msika wosinthika wa ma CD mu 2025, ndipo ubwino wa kapangidwe kake ndi mafilimu opangidwa ndi anthu ena akuyembekezeka kukhala ofunika kwambiri pamene malamulo obwezeretsanso zinthu akupitilizabe kusintha.
5. Mafunso Ofunsidwa Kawirikawiri
Maukadaulo onsewa amachotsa nkhawa zokhudzana ndi zotsalira za solvent, koma amagwiritsa ntchito njira zosiyanasiyana zopangira.
Kupaka utoto wopanda zosungunulira poyamba kumapanga zigawo za filimu imodzi kenako n’kuzilumikiza pamodzi pogwiritsa ntchito zomatira zolimba zopanda zosungunulira 100%. Ikadali njira ya magawo awiri yokhala ndi kupanga filimu kutsatiridwa ndi kupaka utoto.
Kumbali inayi, multilayer co-extrusion imapanga zigawo zonse nthawi imodzi mu mkhalidwe wosungunuka, osafuna zomatira konse.
Poganizira za chitetezo cha chakudya, kuphatikizika kwa zinthu pamodzi kumachotsa kwathunthu zoopsa zokhudzana ndi kusamuka kwa zinthu zokhudzana ndi guluu, kuphatikizapo ma aromatic amines oyamba (PAAs).
Kuchokera pakupanga, co-extrusion imapereka kupanga kwa sitepe imodzi yokhala ndi magawo ochepa okonza komanso magwiridwe antchito apamwamba.
Komabe, lamination yopanda zosungunulira imakhalabe yofunika kwambiri pamene ma phukusi amafunika zinthu zopanda pulasitiki monga zojambulazo za aluminiyamu kapena pepala.
Pazinthu zopangira chakudya zopangidwa ndi pulasitiki yokha, multilayer co-extrusion nthawi zambiri imaonedwa kuti ndi yankho lokwanira kwambiri lopanda zosungunulira.
Mosiyana kwambiri.
Popeza kuti gawo lililonse limalumikizidwa pamodzi pamene likusungunuka, mamolekyu a polima amafalikira m'malo osiyanasiyana, zomwe zimapangitsa kuti molekyulu ikhale yolumikizana mwamphamvu kwambiri kuposa guluu womamatira.
Kuyesa kwa mafakitale kukuwonetsa kuti mphamvu ya peel ya interlayer ya mafilimu opangidwa ndi co-extruded nthawi zambiri imaposa 3 N/15 mm, ndipo nyumba zambiri sizingalekanitsidwe popanda kuwononga filimuyo.
Mosiyana ndi mafilimu opangidwa ndi laminated, filimu ya co extruded multilayer Sizimavutika ndi delamination chifukwa cha ukalamba wa zomatira kapena hydrolysis, zomwe zimapangitsa kuti zikhale zodalirika kwambiri pakasungidwa komanso pakakhala zovuta zachilengedwe.
M'kanthawi kochepa, opanga akhoza kuwononga ndalama zosinthira zomwe zimagwirizanitsidwa ndi kukweza zida kapena kusintha kwa ogulitsa.
Komabe, pakapita nthawi, mafilimu opangidwa ndi co-extruded nthawi zambiri amapereka njira yotsika mtengo kwambiri.
Njira yotulutsira zinthu pamodzi imachotsa zomatira, zosungunulira, mphamvu zouma, ndi nthawi yowuma, zomwe zimapangitsa kuti ndalama zopangira zinthu zikhale zochepa poyerekeza ndi mafilimu ouma okhala ndi ntchito yofanana.
Kuphatikiza apo, zipangizo zogwirira ntchito zodula monga EVOH ndi PA zitha kuphatikizidwa ngati zigawo zoonda kwambiri—nthawi zina zokhuthala ma microns 2–3 okha—zomwe zimachepetsa kwambiri kugwiritsa ntchito zinthu zopangira.
Pamene malamulo okhudza chilengedwe akupitirira kukhwimitsa ndipo ndalama zowongolera za VOC pa lamination youma zikupitirira kukwera, ubwino wazachuma wa multilayer co-extrusion ukuyembekezeka kuonekera kwambiri.
Mapeto
Kusintha kuchoka pa matumba achizolowezi okhala ndi laminated kupita ku multilayer phukusi lopanda zosungunulira lopangidwa ndi zinthu zina sikuti ndi njira yongosintha zinthu zakuthupi—ndi njira yatsopano yaukadaulo yomwe imathetsa mavuto okonza zinthu kuchokera ku gwero lake.
Njira yopangira zinthu yapamwambayi ikukwaniritsa zofunikira zitatu zofunika kwambiri m'makampani:
- Chitetezo cha Chakudya: Amachotsa kwathunthu zotsalira za zosungunulira ndi zoopsa zosamukira zokhudzana ndi zomatira.
- Kutsatira Malamulo Okhudza Zachilengedwe: Zimaletsa kutulutsa kwa VOC komwe kumachokera komanso zimathandiza mapangidwe obwezeretsanso zinthu za mono-material.
- Kugwiritsa Ntchito Bwino ndi Mtengo: Imapereka njira imodzi yopangira zinthu, yosavuta kukonza, komanso imachepetsa ndalama zonse zopangira.
Pamene miyezo yapadziko lonse yopangira chakudya ikupitirirabe kusintha, multilayer co-extrusion ikukhala imodzi mwa ukadaulo wofunikira kwambiri wotsogolera tsogolo la ma CD otetezeka, okhazikika, komanso ogwira ntchito bwino kwambiri.
