Kanema wa Polyvinyl Alcohol (PVA) amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana chifukwa cha mawonekedwe akebiodegradability, kusungunuka kwamadzi, komanso kupanga mafilimu abwino kwambiri. Komabe, kupeza wapamwamba kwambiriKupaka filimu ya PVAzimafuna kusankha ndendende zipangizo. Kumvetsetsa zopangira izi ndikofunikira kwambiri pakuwongolera magwiridwe antchito a kanema, kulimba, ndi magwiridwe antchito.
1. Polyvinyl Mowa (PVA) - Chigawo Chachikulu
Pamtima pa zokutira filimu ya PVA palimowa wa polyvinyl, polima yopangidwa yomwe imapereka zomatira bwino, kusinthasintha, ndi zotchinga. Kulemera kwa maselo ndi digiri ya hydrolysis ya PVA imakhudza mwachindunjimphamvu ya filimuyo, kusungunuka kwake, ndi kukana kwa mankhwala. Kusankha giredi yoyenera ya PVA kumawonetsetsa kuti magwiridwe antchito amayenda bwino pamapulogalamu monga kuyika, ulimi, ndi mankhwala.
2. Plasticizers - Kupititsa patsogolo Kusinthasintha ndi Mphamvu
Plasticizers amawonjezeredwakusintha kusinthasintha ndi makina katundumafilimu a PVA. Popanda mapulasitiki, filimuyo imatha kukhala yofewa komanso yosweka. Ma plasticizer omwe amagwiritsidwa ntchito kawirikawiriKupaka filimu ya PVAzikuphatikizapo:
•Glycerol- Plasticizer yomwe imagwiritsidwa ntchito kwambiri yomwe imathandizira kusinthasintha komanso kusunga chinyezi.
•Polyethylene Glycol (PEG)- Imawonjezera kusinthasintha kwa filimu ndikuletsa kuchepa.
•Sorbitol- Imakulitsa kukhazikika pomwe ikusunga kuwonekera kwakukulu.
Kusankha plasticizer yoyenera kumathandiza kulinganizamphamvu, kuwonekera, ndi kusinthasinthapazosowa zamakampani osiyanasiyana.
3. Crosslinking Agents - Kupititsa patsogolo Kukhazikika ndi Kukaniza Madzi
Mafilimu a PVA nthawi zambiri amafunikira ma crosslinking agentsonjezerani kukana kwa mankhwala, kukhazikika kwa chinyezi, ndi mphamvu zamakina. Othandizirawa amagwira ntchito popanga mgwirizano wamankhwala pakati pa maunyolo a polima, kupangitsa filimuyo kukhala yochulukirapowokhazikika komanso wokhazikika. Common crosslinking agents ndi:
•Borates (Borax)- Imawonjezera kulimba kwa filimu komanso zomatira.
•Glutaraldehyde- Imawonjezera kukana kwa madzi ndikusunga kusinthasintha.
•Dicarboxylic Acids- Imalimbitsa mawonekedwe a kanema popanda kusokoneza biodegradability.
Kuphatikiza koyenera kwa ma crosslinking agents kumatsimikizira afilimu ya PVA yokhalitsa komanso yapamwamba kwambiri.
4. Fillers - Kupititsa patsogolo Makina ndi Optical Properties
Kuti musinthe mawonekedwe, mawonekedwe, ndi magwiridwe antchito a zokutira zamafilimu a PVA,fillersnthawi zambiri amawonjezeredwa. Zida izi zimatha kusinthafilimu opacity, mphamvu, ndi kukwera mtengo. Ena mwa ma fillers omwe amagwiritsidwa ntchito kwambiri ndi awa:
•Titanium Dioxide (TiO₂)- Amapereka kuyera komanso kukana kwa UV.
•Silika (SiO₂)- Imawonjezera mphamvu ya kanema ndikuchepetsa kukangana pamwamba.
•Calcium carbonate (CaCO₃)- Amachepetsa ndalama zopangira ndikusunga kukhulupirika kwa filimu.
Kugwiritsa ntchito zodzaza zoyenera kumathandizira kukonza mafilimu a PVAmapulogalamu enieni, monga zopakira zomwe zimatha kuwonongeka, mafilimu aulimi, kapena matumba osungunuka m'madzi.
5. Ma Surfactants - Kupititsa patsogolo Coating Uniformity
Kwa wopambana ndifilimu yosalala ya PVA, ma surfactants ndi ofunika. Zosakaniza izikuchepetsa kupanikizika pamwamba, kulola kuti zokutira zifalikire mofanana pamtunda. Ma surfactants ofunikira omwe amagwiritsidwa ntchito popanga mafilimu a PVA ndi awa:
•Non-ionic surfactants- Sinthani kunyowetsa kwamavidiyo ndi kubalalitsidwa.
•Anionic surfactants- Limbikitsani kukhazikika komanso zomatira.
•Ma surfactants opangidwa ndi silicone- Chepetsani zolakwika zapamtunda ndikuwongolera mawonekedwe afilimu.
Kusankhidwa koyenera kwa surfactant kumatsimikizirafilimu yokhazikika makulidwe ndi kusalala, zomwe ndizofunikira kwambiri pamapulogalamu omwe amafunikira zotchinga zenizeni.
6. Zowonjezera - Kupititsa patsogolo Magwiridwe ndi Ntchito
Zowonjezerazowonjezera ntchitoakhoza kuphatikizidwa muPVA filimu zokutirakukwaniritsa zofunikira zamakampani. Zina zowonjezera zowonjezera ndi izi:
•UV Stabilizers- Tetezani kuti musawonongedwe ndi kuwala kwa dzuwa.
•Anti-blocking Agents- Pewani zigawo zamafilimu kuti zisamamatirane panthawi yosungira.
•Antimicrobial Agents- Wonjezerani moyo wa alumali wazinthu poletsa kukula kwa bakiteriya.
Posankha mosamala zowonjezera zowonjezera, opanga angathemakonda mafilimu a PVAkuonjezera kugwiritsidwa ntchito kwawo m'mafakitale osiyanasiyana.
Mapeto
Ubwino ndi magwiridwe antchito aKupaka filimu ya PVAkudalira akupangidwa bwino kwa zipangizo. Posankha kuphatikiza koyenera kwaPVA, plasticizers, crosslinking agents, fillers, surfactants, ndi zowonjezera, opanga akhoza kupanga mafilimu ndikukhazikika kwapamwamba, kusinthasintha, ndi magwiridwe antchito.
Mukuyang'ana mayankho apamwamba kwambiri a kanema wa PVA?ContactJWELLlerokuti mufufuze zida zapamwamba komanso njira zokutira zatsopano zogwirizana ndi zosowa zanu!
Nthawi yotumiza: Apr-02-2025