Tanthauzo ndi makhalidwe a multilayer co-extruded filimu

Choyamba, ndimultilayer co-extrusionresistance diaphragm ndi filimu yapulasitiki.Pazinthu zamapulasitiki, nthawi zambiri timatchula zinthu zapulasitiki zokhala ndi makulidwe osakwana 0.2 mm ngati mafilimu apulasitiki, omwe ali ndi makulidwe apakati pa 0.2 ndi 0.7 mm ngati mapepala apulasitiki ndi omwe ali ndi makulidwe akulu kuposa 0.7 mm ngati mbale.Multilayer co-extrusion resistance resistance diaphragm imakhala ndi ntchito yotchinga mpweya.Chotchinga apa chikutanthauza kuthekera kotchinjiriza kwa zinthu zapulasitiki (zotengera, mafilimu) motsutsana ndi mpweya wocheperako wa ma cell ndi fungo.Nthawi zambiri timagwiritsa ntchito mphamvu ya gasi kuyeza kuchuluka kwa zinthu zapulasitiki.PE, PP ndi mapulasitiki ena onse ali ndi mphamvu zazikulu zochepetsera mpweya, ndiko kuti, mpweya wodutsa mpweya ndi wosauka, pamene PA, PVDC, EVOH ndi zipangizo zina za utomoni zimakhala ndi mpweya wochepa kwambiri kuposa mapulasitiki ambiri, ndipo mpweya wabwino ndi wabwino.Chifukwa chake, nthawi zambiri timatchafilimu ya multilayer coextrusionokhala ndi utomoni wosachepera umodzi wa PA, PVDC ndi EVOH ngati diaphragm ya multilayer coextrusion resistance.PE, PA, TIE, EVOH ndi ma resins ena atha kugwiritsidwa ntchito ngati vacuum ma CD a mkaka, kupanikizana, nyama, ndi zina.

Mafilimu a Multilayer co-extrudedmakamaka atengere ABCBA5 wosanjikiza symmetrical kapangidwe, ndi PA kapena EVOH monga chotchinga wosanjikiza ndi polyethylene monga matenthedwe chisindikizo wosanjikiza.Utomoni womatira umagwiritsidwa ntchito kulekanitsa chotchinga chosalumikizidwa ndi chosindikizira chamafuta.PA kapena EVOH imakhudzidwa kwambiri ndi chinyezi, yotetezedwa ndi polyethylene wosanjikiza, ndipo ntchito yake yabwino kwambiri yotchinga mpweya yapangidwa mokwanira.Ambiri, kapangidwe kafilimu ya multilayer co-extrudedzimadalira ntchito zofunika filimu.Pamaziko a kukwaniritsa zofunikira za ndondomekoyi, kuphatikiza ma polima osiyanasiyana amatha kukwaniritsa zofunikira zazinthu zonyamula katundu monga chotchinga, kusindikiza kutentha, mphamvu ya thupi, kuphulika kwa kutentha, kusinthasintha kwa chilengedwe, makhalidwe achiwiri a processing ndi kukulitsa yosungirako ndi moyo wa alumali.Kuchokera pakuwona zofunikira zogwirira ntchito, kuphatikiza ma polima asanu ndikokwanira.Komabe,filimu yopangidwa ndi co-extrudedndi zigawo zisanu ndi ziwiri, zisanu ndi zinayi, khumi ndi chimodzi kapena kuposerapo zakhala zikugwiritsidwa ntchito pamsika zomwe zimapangitsa kuti zikhale zochitika komanso zikukula mofulumira.Mapangidwe apangidwe a filimu yopangidwa ndi co-extruded amafunika pang'onopang'ono kuti akwaniritse bwino ntchito yogwirizanitsa ntchito, teknoloji, mtengo, chitetezo cha chilengedwe, chitetezo ndi ntchito yachiwiri.

1. Kuyerekeza mtengo
Kugwiritsa ntchito ma polima otsika mtengo pamtunda m'malo mwa ma polima okwera mtengo kumatha kuchepetsa mtengo wazinthu ndipo kumakhala ndi ntchito yosindikiza kutentha komanso kukana chinyezi cha ma polima a ionic chain.Kwa zipangizo zomwe zili ndi chotchinga chomwecho ndi kutentha-kusindikiza-kutentha filimu yowomberedwa ndi 7-wosanjikiza co-extrusion ndiyotsika mtengo kuposa filimu ya 5-wosanjikiza.

2. Chotchinga
Kugwiritsa ntchito ma polima awiri osiyana m'malo mwa polima imodzi pa chotchinga chosanjikiza kumatha kusintha kwambiri chotchinga chake.Mwachitsanzo, kuphatikiza kwa EVOH wosanjikiza ndi zinthu wamba nayiloni sikungangosunga kulowera kwa PA, komanso kukulitsa mphamvu ya EVOH ndikuwongolera kukana kwa EVOH chifukwa EVOH wosanjikiza wapachikidwa pakati pa zigawo ziwiri za PA amine, ndikupangitsa filimu yokhala ndi chotchinga chachikulu, pomwe filimu yamagulu asanu osanjikizana sichingakwaniritsidwe.Mtengo wowonjezereka wowonjezera EVOH ukhoza kuwonjezeredwa ku chiwerengero chonse cha kapangidwe kake.Mpweya wa mpweya wa mpweya wa filimu yopangidwa ndi filimu ya 20% PA ndi 3.5 mayunitsi, koma pansi pazifukwa zomwezo, mlingo wa EVOH wowonjezeredwa ku filimu yosanjikiza isanu ndi iwiri ndi mayunitsi a 0.13.

3. Kukaniza mng'alu
Katundu wa mafilimu a PA co-extruded okhala ndi zigawo zambiri zitha kusinthidwa.Mwachitsanzo, kugwiritsa ntchito zomatira zowonjezera kumatha kupititsa patsogolo ntchito yotchinga ya filimuyo powonjezera mphamvu yamadzi yotchinga filimuyo.Ubwino wina womwe umapezeka nthawi yomweyo ndikuti umapangitsa filimuyo kukhala yofewa, kumva bwino komanso kukhala ndi kukana bwino kwa ming'alu.

Ndi kupita patsogolo kosalekeza kwaukadaulo wa polima kaphatikizidwe, ma polima atsopano okhala ndi mawonekedwe apadera komanso amakina amatha kugwiritsidwa ntchito kwambiri kuti akwaniritse zosowa zamapaketi.Ntchito ndi kapangidwe kafilimu ya multilayer co-extruded composite substrateadzakhala ndi kusinthasintha kwakukulu ndi chuma.Kupyolera mukugwiritsa ntchito ndikuwongolera zida zomangira ndi ukadaulo, kuphatikizidwa ndi kapangidwe kapadera komanso kothandiza kapangidwe kamagulu, opanga mafilimu adzakhala ndi gawo losintha pakutsata ndi kulingalira kwamaganizidwe amitundu yosiyanasiyana yamapaketi, kulinganiza kapangidwe kazinthu, ndi kukulitsa mapindu a phukusi.