PP/PE/PA/PETG/EVOH Multilayer Barrier Mapepala Co-extrusion Line
Main Technical Parameter
| Chitsanzo cha mzere | Extruder model | Zogulitsa m'lifupi | Zamgulu makulidwe | Design extrusion linanena bungwe |
| 7 zigawo co-extrusion | 120/75/50/60/75 | 800-1200 mm | 0.2-0.5 mm | 500-600kg / h |
| 9 zigawo co-extrusion | 75/100/60/65/50/75/75 | 800-1200 mm | 0.05-0.5mm | 700-800kg / h |
Zindikirani: Zosinthazi zitha kusintha popanda chidziwitso.
Msika wamapulogalamu a EVOH
M'munda ozizira unyolo chakudya ma CD, anthu ntchito zitsulo kapena magalasi zipangizo monga ma CD chakudya kuti bwino kudzipatula malowedwe a zigawo zosiyanasiyana mpweya mkati ndi kunja kuonetsetsa khalidwe zili ndi mtengo wapatali. Chifukwa pali zinthu zitatu zazikulu zomwe zimayambitsa kuwonongeka kwa chakudya: zinthu zamoyo (zochitika za enzyme, etc.), zinthu za mankhwala (makamaka makutidwe ndi okosijeni a zigawo za chakudya) ndi zinthu zakuthupi (hygroscopic, kuyanika, etc.). Zinthuzi zimagwira ntchito pazochitika zachilengedwe monga mpweya, kuwala, kutentha, chinyezi, ndi zina zotero, zomwe zimapangitsa kuti chakudya chiwonongeke. Kupewa kuwonongeka kwa chakudya makamaka kuletsa kuchulukana kwa tizilombo tating'onoting'ono m'zakudya, kuteteza makutidwe ndi okosijeni a zigawo za chakudya ndi okosijeni, komanso kuteteza chinyezi ndikusunga kukoma koyambirira kwa chakudyacho.
Ethylene-vinyl alcohol copolymer, yotchedwa EVOH, imadziwika kuti ndi ma resin atatu akulu kwambiri padziko lonse lapansi kuphatikiza polyvinylidene chloride (PVDC) ndi polyamide (PA) [2]. EVOH imatha kuletsa kwambiri kulowerera kwa mpweya mumpweya muzakudya, potero imalepheretsa kupanga poizoni ndi zinthu zina zovulaza chifukwa cha kuchuluka kwa tizilombo tating'onoting'ono, komanso ingalepheretse kusintha kwa kapangidwe kake chifukwa cha okosijeni, ndikusunga kununkhira komanso kupewa kuipitsidwa kwa fungo lakunja. Komanso, kusowa kwa zinthu zotchinga chinyezi kumatha kulipidwa ndi zigawo zina za polyolefin. Chifukwa chake, zida zonyamula za EVOH multilayer zitha kupewa kuwonongeka kwa chakudya ndikuwonjezera moyo wa alumali. Kuphatikiza apo, ndizosavuta kukonza ndi kupanga, komanso zimakhala ndi ntchito yabwino yoteteza chilengedwe. Chifukwa cha zotchinga mpweya wabwino kwambiri, kuwonekera, kusinthika ndi kukana zosungunulira za EVOH resin, minda yake yogwiritsira ntchito ikukulirakulirakulira, ndipo kufunikira kukukulirakuliranso.
High chotchinga EVOH utomoni
1. Zinthu zakuthupi
Zotchinga katundu wa EVOH The chotchinga katundu wa polima zipangizo amanena kutchinga mphamvu katundu mankhwala ang'onoang'ono mpweya mpweya, zamadzimadzi, nthunzi madzi, etc. Panopa utomoni ambiri ntchito mitundu ndi katundu chotchinga zabwino monga: EVOH, PVDC, PAN, PEN, PA. ndi PET.
2. EVOH ikagwiritsidwa ntchito ngati chotchinga chapamwamba, nthawi zambiri imatenga mawonekedwe amitundu yambiri. Zomwe zimagwiritsidwa ntchito nthawi zambiri ndi: PP, HIPS, PE, EVOH, AD, ndi AD ndiye zomatira pamapangidwewo. Mapangidwe amitundu yambiri amatha kupereka masewera athunthu kuzinthu zamtundu uliwonse, kupititsa patsogolo kukana kwamadzi kwa EVOH, ndikupeza zida zotchinga kwambiri zomwe zili ndi zinthu zambiri. Ambiri aiwo adagwiritsidwa ntchito m'mapaketi osinthika m'mbuyomu, koma ma resins ophatikizika monga PP, PE, ndi PA sali osavuta nkhonya chifukwa cha kulimba kwawo bwino komanso kusasunthika kosasunthika, komwe kumalepheretsa kugwiritsa ntchito kwawo pakuyika kolimba, makamaka mu zinthu zodzaza pa intaneti. HIPS yosagwira ntchito ya polystyrene ili ndi kukhazikika bwino komanso mawonekedwe abwino kwambiri omangira, oyenera kukhomerera komanso oyenera kuyika zida zolimba. Chifukwa chake, ndikofunikira kwambiri kukulitsa mwamphamvu zida za EVOH zotchingira zotchinga zoyenera kuyika zolimba.
Chifukwa chosagwirizana bwino pakati pa EVOH resin ndi HIPS resin, komanso kusiyana kwakukulu kwa resin rheology rate, mphamvu yolumikizana pakati pa gawo lapansi ndi EVOH, zofunikira zamphamvu za EVOH pakuwumba kwachiwiri, ndi kugawa kwa EVOH panthawi ya kalendala. kutulutsa mapepala ophatikizika Kufanana kwa zinthu zophatikizika ndizinthu zonse zazikulu zomwe zimakhudza magwiridwe antchito ndi kugwiritsa ntchito zida zophatikizika, komanso ndizovuta zovuta zomwe ziyenera kuthetsedwa popanga mtundu uwu wazinthu zophatikizika.
Chinsinsi cha ukadaulo wa multilayer co-extrusion ndi zomatira (AD). Zida zophatikizira za EVOH nthawi zambiri zimakhala ndi PPEVOH, koma PP ndi EVOH sizingamangidwe mwachindunji, ndipo zomatira (AD) ziyenera kuwonjezeredwa pakati pa PP ndi EVOH. Posankha zomatira, m'pofunika kuganizira zomatira za PP ngati maziko, chachiwiri ndikufanana ndi kusungunuka kwa kusungunuka kwa PP ndi EVOH, ndipo chachitatu ndi kufunikira kwa mphamvu zamagetsi, kuti mupewe delamination panthawi yachiwiri. kukonza. Chifukwa chake, mapepala omwe amaphatikizidwa nthawi zambiri amakhala masamba osanjikiza asanu (PPADEVOHADPP). / AD/EVOH/AD/R/PP, wosanjikiza chakunja ndi PP zinthu zatsopano, ndi zigawo zina ziwiri PP wosweka zobwezerezedwanso zinthu R(PP). Mapangidwe a asymmetric angagwiritsidwenso ntchito, ndi zinthu zina (PE / HIPS, etc.) extruders akhoza kuwonjezeredwa kwa co-extrusion. Mfundoyi ndi yofanana, ndipo njira yofanana ya multilayer co-extrusion ingapezeke.
Kugwiritsa ntchito
Zinthu za EVOH zili ndi zotchinga zabwino. Kudzera luso co-extrusion ndi PP, Pe, PA, PETG ndi zipangizo zina, akhoza kukonzedwa mu 5-wosanjikiza, 7-wosanjikiza, ndi 9-wosanjikiza mkulu-chotchinga opepuka ma CD zipangizo, makamaka ntchito ma CD aseptic, odzola zakumwa, mkaka, chilled nsomba ndi nyama katundu ma CD etc. Mu mbali sanali chakudya, ntchito mankhwala, kosakhazikika zosungunulira ma CD ndi minda ina, ndi katundu chotchinga kwambiri, amene kwambiri bwino alumali moyo wa mankhwala.
