Ts'ebetso ea Tlhahiso ea PVA le Likopo tse pharaletseng

Polyvinyl Alcohol (PVA) ke polymer ea maiketsetso e hlahisoang ka polymerization ea vinyl acetate e lateloang ke hydrolysis. Mona ke kakaretso ea ts'ebetso ea tlhahiso ea PVA le ts'ebeliso ea eona e pharaletseng:

Mokhoa oa Tlhahiso:

1. Polymerization ea Vinyl Acetate:
   • Li-monomers tsa vinyl acetate li entsoe ka polymerized ho sebelisa mochine oa mahala oa radical ka pel'a motsoako kapa e le emulsion. Mohato ona o fella ka hore ho thehoe polyvinyl acetate (PVAc), polymer e tšoeu, e qhibilihang ka metsing.
2. Hydrolysis ea Polyvinyl Acetate:
   • PVAc polymer e entsoe ka hydrolyzed ka ho e phekola ka tharollo ea alkaline (e kang sodium hydroxide) tlas'a maemo a laoloang. Karabelo ena ea hydrolysis e qhekella lihlopha tsa acetate mokokotlong oa polymer, e leng se etsang hore ho thehoe joala ba polyvinyl (PVA).
3. Ho Hloekisa le ho Omisa:
   • Tharollo ea PVA e nka mehato ea tlhoekiso ho tlosa litšila le li-monomers tse sa sebetseng. Tharollo e hloekisitsoeng ea PVA e ntan'o omisoa ho fumana li-flakes tse tiileng tsa PVA kapa phofo.
4. Ts'ebetso e Eketsehileng:
   • Li-flakes tsa PVA kapa phofo li ka sebetsoa hape ka mefuta e fapaneng joalo ka granules, pellets, kapa tharollo, ho latela ts'ebeliso e reriloeng.

Lisebelisoa tse pharalletseng:

1. Likhomaretsi le li-Binders:
   • PVA e atisa ho sebelisoa e le sekhomaretsi sa likhomaretsi, ho kenyeletsoa sekhomaretsi sa lehong, sekhomaretsi sa pampiri le likhomaretsi tsa masela. E fana ka ho khomarela ka matla ho li-substrates tse fapa-fapaneng 'me e fana ka thepa e babatsehang ea ho etsa lifilimi.
2. Masela le likhoele:
   • Likhoele tsa PVA li sebelisoa mesebetsing ea masela joalo ka ho loha, ho loha le masela a sa lohoeng. Li bonts'a thepa e joalo ka matla a phahameng a tensile, abrasion resistance, le botsitso ba lik'hemik'hale.
3. Liaparo tsa Pampiri le Sizing:
   • PVA e sebelisoa ho koahela pampiri le ho etsa boholo ba sebopeho ho ntlafatsa boreleli, ho hatisoa le ho khomarela enke. E matlafatsa matla le ho tšoarella ha lihlahisoa tsa pampiri.
4. Lisebelisoa tsa Kaho:
   • Lisebelisoa tse thehiloeng ho PVA li sebelisoa linthong tsa kaho tse kang li-additives tsa seretse, li-adhesive tsa lithaele, le liphahlo tsa samente. Ba ntlafatsa ho sebetsa, ho khomarela, le ho tšoarella ha lihlahisoa tsa kaho.
5. Lifilimi tsa ho paka:
   • Lifilimi tsa PVA li sebelisetsoa ho paka lits'ebetso ka lebaka la thepa ea tsona e ntle ea litšitiso, ho hanyetsa mongobo, le biodegradability. Li sebelisoa ho paka lijo, lifiliming tsa temo le lits'ebetsong tse khethehileng tsa ho paka.
6. Litlolo le Lihlahisoa tsa Tlhokomelo ea Motho:
   • PVA e sebelisoa ho litlolo le lihlahisoa tsa tlhokomelo ea motho joalo ka li-gel tsa setaele sa moriri, litlolo le litlolo. E fana ka thepa ea ho etsa lifilimi, ho tiisa, le liphello tse tsitsitseng.
7. Likopo tsa Bongaka le Litlhare:
   • PVA e sebelisoa lits'ebetsong tsa bongaka le tsa meriana tse kang litsamaiso tsa phepelo ea lithethefatsi, maqeba a maqeba, le liphahlo tsa lense tsa puisano. E na le biocompatible, ha e na chefo, 'me e bonts'a ho qhibiliha ha metsi hantle.
8. Indasteri ea Lijo:
   • PVA e sebelisoa e le tlatsetso ea lijo lits'ebetsong tse fapaneng joalo ka lifilimi tse jeoang, ho kenyelletsa litatso kapa limatlafatsi, hape e le ntho e matlafatsang lihlahisoa tsa lijo. E nkoa e sireletsehile bakeng sa ho sebelisoa ke batho.

Ka bokhuts'oane, Polyvinyl Alcohol (PVA) ke polymer e sebetsang ka mokhoa o fapaneng e nang le lits'ebetso tse fapaneng ho pholletsa le liindasteri tse kang likhomaretsi, masela, pampiri, kaho, liphutheloana, litlolo, bongaka, meriana le lijo. Mehaho ea eona e ikhethang e etsa hore e tšoanelehe bakeng sa lisebelisoa tse fapaneng tse hlokang ho etsa filimi, sekhomaretsi, se tlamang, se thibelang, le thepa e qhibilihang ka metsing.