Pamene kupanga zinthu mokhazikika komanso ukadaulo wosindikiza zinthu zobiriwira ukukulirakulira padziko lonse lapansi, makampani osindikiza ndi kulongedza zinthu akusinthasintha kwambiri kuti apange zinthu zosamalira chilengedwe. Malamulo okhwima kwambiri okhudza kutulutsa mpweya wa VOC, monga China's Action Plan for the Comprehensive Control of Volatile Organic Compounds in Key Industries, pamodzi ndi ma audit a eni ake a green chain, apangitsa makina a inki opanda benzene (ndipo opanda ketone) kukhala chinthu chofunikira kwambiri m'malo mongofuna kudzipereka.

Kwa opanga inki, vuto lalikulu lili pakutsutsana kwakukulu: momwe mungachotseretu zosungunulira zapamwamba zopangidwa ndi benzene pamene mukusunga—kapena kukonza—kumatirira, mphamvu ya lamination, komanso kusindikizidwa mosavuta pa mafilimu apulasitiki opanda mphamvu zambiri monga BOPP. Pakusintha kumeneku, polypropylene ya chlorine Utomoni wa CPP, womwe umadziwika kuti ndi chinthu chothandizira kumatira, ukupezeka ngati chinthu chofunikira kwambiri chothandizira kusindikiza zinthu zosawononga chilengedwe chifukwa cha kusinthasintha kwake kwapadera mu inki yopanda benzene.

Chifukwa cha kupanikizika kawiri kwa ma CD ndi zinthu zofunika kwambiri pakupanga zinthu, opanga mafilimu ambiri a polyethylene (PE) akukumana ndi vuto lalikulu. Ogwiritsa ntchito mafilimu akupitilizabe kukweza zofunikira kuti asabowoledwe ndi kulimba kwa kung'ambika, pomwe njira zosinthira zinthu zakale—monga kuwonjezera makulidwe a filimu kapena kuwonjezera zinthu zina zosinthira—zikhoza kukweza mtengo wa zinthuzo kapena kuchepetsa kuwonekera bwino kwa filimu, kuyera, ndi kubwezeretsanso.

Pamene njira zachikhalidwe zosinthira zinthu zikufika pamlingo woyenera, ukadaulo wosintha zinthu womwe umachokera ku uinjiniya wapamwamba wa zinthu—kulumikiza kwa electron beam crosslinking—ukuyamba kukhala njira yabwino kwambiri. Ndi njira yake yapadera ya "kulimbitsa popanda zowonjezera", kulumikizana kwa mtanda wa ma elekitironiimapereka njira yothandiza pamalonda yokweza kwambiri mawonekedwe a makina a mafilimu opaka utoto a PE popanda kuwononga kukhazikika kapena chitetezo cha zinthu.

Pamene malamulo apadziko lonse okhudza chilengedwe akupitirira kukhwima ndipo mafakitale monga magalimoto, zamankhwala, ndi opanga zinthu zapamwamba akuika zofuna zambiri pa magwiridwe antchito ndi chitetezo cha zinthu, opanga mapulasitiki achikhalidwe akukumana ndi kukakamizidwa kwakukulu kuti asinthe. Makamaka, zoletsa pa ma phthalates ena motsatira malamulo monga EU REACH ndi US TPCH, pamodzi ndi ziyembekezo zomwe zikukula za kukana kutentha, kulimba, komanso poizoni wochepa pazinthu zomwe zimagwiritsidwa ntchito kumapeto, zikufulumizitsa kusintha kwakukulu pakusankha zinthu zapulasitiki.

Motsutsana ndi izi, TOPM(Tetraisooctyl Pyromellitate) yakhala njira yabwino kwambiri yogwiritsira ntchito zinthu zovuta, chifukwa cha magwiridwe ake abwino kwambiri. Kupatula kungogwiritsa ntchito pulasitiki, TOPM ndi njira yopangira zinthu zofunika kwambiri kuti ikwaniritse zofunikira zonse za kukana kutentha kwambiri, chitetezo chowonjezereka, komanso moyo wautali wautumiki.

Mu ntchito monga ma CD oteteza zinthu zosawononga chilengedwe pazida zachipatala, chitetezo cha kutsitsimuka kwa nyemba za khofi zapamwamba, ndi ma CD oteteza chinyezi pazida za semiconductor, magwiridwe antchito a zotchinga ndiye chitetezo chomaliza chomwe chimateteza ubwino ndi mtengo wa chinthucho. Zipangizo zotchinga kwambiri monga polyvinylidene chloride (PVDC) ndi ethylene–vinyl alcohol copolymer(EVOH) amadziwika kwambiri chifukwa cha mphamvu zawo zabwino kwambiri zotchingira mpweya ndi chinyezi.

Komabe, m'malo enieni opangira ndi kugwiritsa ntchito, ubwino uwu nthawi zambiri umachepetsedwa ndi zolakwika pakukonza, kukhudzidwa ndi momwe zinthu zilili, komanso kufunika kogwirizanitsa magwiridwe antchito ndi ndalama zopangira. Pamene njira zachikhalidwe zowonjezera—monga zokutira pamwamba, kapangidwe ka multilayer, kapena kusakaniza ma polima—zifika pamalire awo aukadaulo, kuwala kwa kuwala kwa elekitoniikubwera ngati ukadaulo wogwira mtima wosintha zinthu zakuthupi womwe umalimbitsa magwiridwe antchito a zotchinga pamlingo wa mamolekyu.

Mu ma phukusi ovuta monga chakudya chatsopano chozizira, ma phukusi azachipatala osawonongeka, ndi kusunga chakudya chokonzeka kudya, mafilimu ochepetsera nthawi zambiri amakumana ndi zolepheretsa magwiridwe antchito. Mavuto omwe amapezeka nthawi zambiri ndi monga kusweka ndi kusweka panthawi yonyamula kutentha kochepa, makulidwe osafanana panthawi yochepetsa kutentha, komanso kutayika pang'onopang'ono kwa kulimba pambuyo posunga nthawi yayitali, zomwe pamapeto pake zingayambitse kulephera kwa phukusi.

Vuto lalikulu kwa opanga ndi momwe angakulitsire mphamvu ya makina komanso kudalirika kwa nthawi yayitali kwa mafilimu ocheperako popanda kusokoneza kuwonekera bwino kwa kuwala, kutsatira malamulo a chilengedwe, kapena kugwiritsa ntchito bwino ndalama. Kuwala kwa ma elekitironi othamangitsa magetsiUkadaulowu umapereka yankho lothandiza mwa kuwongolera kusintha kwa zinthu za polima pamlingo wa mamolekyulu, zomwe zimapangitsa kuti filimuyo igwire bwino ntchito.

Mu dziko la zipangizo zonyamula zinthu zapamwamba kwambiri, EVOH (Copolymer ya Ethylene-Vinyl Alcohol) chakhala chinthu chofunikira kwambiri poonetsetsa kuti chakudya chikhale chatsopano, chitetezo cha mankhwala, komanso kukhazikika kwa zinthu zamafakitale, chifukwa cha mawonekedwe ake abwino kwambiri otchinga. Makamaka m'mapangidwe amafilimu okhala ndi zigawo zambiri, gawo la chotchinga cha EVOH limagwira ntchito yofunika kwambiri "yoyang'anira chipata". Pamene kufunikira kwa msika kuti ukhale nthawi yayitali komanso magwiridwe antchito abwino a chotchinga akupitilira kukwera, kuwonjezera makulidwe a gawo la EVOH kwakhala yankho lofunikira. Komabe, izi sizongowonjezera zinthu zina - ndi kukweza kwathunthu komwe kumaphatikizapo sayansi ya zida, uinjiniya wa njira, komanso kugwiritsa ntchito bwino ndalama.

Mu dziko la ma phukusi otchinga kwambiri, EVOH (Copolymer ya Ethylene-Vinyl Alcohol() ndi yotchuka kwambiri chifukwa cha luso lake lapadera loletsa mpweya. Imagwiritsidwa ntchito kwambiri m'mafakitale komwe kusunga ndi chitetezo ndikofunikira kwambiri, monga kulongedza chakudya, zipatso zatsopano, chakudya chokonzedwa kale, ndi zida zamankhwala. Mafilimu a EVOH Popeza amapambana kwambiri pa ntchito yoteteza mpweya, amakumana ndi mavuto okhudzana ndi kukana nthunzi ya madzi—makamaka m'malo otentha kwambiri komanso omwe ali ndi chinyezi chambiri. Kodi zifukwa zasayansi zomwe zimayambitsa vutoli ndi ziti, ndipo n'chifukwa chiyani mafilimu a EVOH sangathe kuthana bwino ndi zonsezi?

Mu makampani opanga ma CD apamwamba kwambiri, malire a magwiridwe antchito a zipangizo akusinthidwa nthawi zonse. Monga imodzi mwa ma resin atatu akuluakulu okhala ndi zopinga zambiri, Copolymer ya Ethylene-Vinyl Alcohol(EVOH) yakhala ngati "chishango chagolide" chomwe chimateteza mtundu wa chakudya, zipatso zatsopano, ndi zipangizo zachipatala. Ndi mphamvu zabwino kwambiri zotchingira mpweya, kuwonekera bwino, komanso chitetezo cha chilengedwe, EVOH ndi yofunika kwambiri pa ntchito zomwe zimafuna chitetezo chokhalitsa. Komabe, zovuta zake zobisika ndi madzi komanso kutseka kutentha zimakweza kusankha njira zopangira kuchokera pa "gawo lopanga" kupita pa chinthu chofunikira chomwe chimatsimikiza magwiridwe antchito ake.

Mu makampani opanga ma CD a masiku ano, omwe amafuna zinthu zatsopano, chitetezo, komanso zokhazikika, Mowa wa Ethylene-VinylMakanema a (EVOH) ndi Polyvinyl Alcohol (PVA) aonekera ngati njira ziwiri zotsogola zopezera magwiridwe antchito apamwamba. Ndi zovuta zomwe zimadza chifukwa cha kusakhazikika kwa unyolo woperekera zinthu padziko lonse lapansi, malamulo okhwima kwambiri okhudza chilengedwe, komanso kufunikira kwakukulu kwa ma CD "obwezerezedwanso" kukukula, kumvetsetsa momwe mungagwiritsire ntchito bwino zida izi kukukhala njira yofunika kwambiri kwa opanga ma CD osinthika komanso eni ake amakampani omwe akufuna kukhalabe opikisana.

Ndi mphamvu zonse pamodzi zomwe zikugogomezera kwambiri kukhazikika kwa zinthu komanso kufunikira kwakukulu kwa zipangizo zogwirira ntchito bwino, ethylene-vinyl mowa copolymer(EVOH) yasintha kuchoka pa zinthu zotchinga zapadera kukhala chinthu chofunikira kwambiri chomwe chikusintha mafakitale apadziko lonse lapansi, kuphatikizapo kulongedza, chisamaliro chaumoyo, ndi magalimoto. Kumvetsetsa zomwe zimayambitsa mavuto ndi zovuta zomwe zikupanga chitukuko chake chamtsogolo ndikofunikira kuti tigwiritse ntchito m'badwo wotsatira wazinthu zomwe zimagwiritsidwa ntchito komanso mwayi wamsika.