Filimi ea Polyvinyl Alcohol (PVA) e sebelisoa haholo liindastering tse fapaneng ka lebaka la eonabiodegradability, ho qhibiliha ha metsi, le thepa e babatsehang ea ho etsa lifilimi. Leha ho le joalo, ho fihlella boleng bo phahamengHo roala filimi ea PVAe hloka khetho e nepahetseng ea lisebelisoa tse tala. Ho utloisisa metsoako ena ea bohlokoa ho bohlokoa bakeng sa ho ntlafatsa ts'ebetso ea lifilimi, ho tšoarella le ts'ebetso.
1. Polyvinyl Alcohol (PVA) - The Core Component
Bohareng ba ho roala filimi ea PVA ho na le leshanojoala ba polyvinyl, polymer ea maiketsetso e fanang ka sekhomaretsi se setle haholo, se tenyetsehang, le thepa ea thibelo. Boima ba limolek'hule le tekanyo ea hydrolysis ea PVA e ama ka ho tobamatla a filimi, ho qhibiliha le ho hanyetsa lik'hemik'hale. Ho khetha boemo bo nepahetseng ba PVA ho netefatsa ts'ebetso e nepahetseng lits'ebetsong tse kang ho paka, temo le meriana.
2. Li-Plasticizers - Ho ntlafatsa ho Fetolana le Matla
Li-plasticizers li kenngoa ho tsonantlafatsa ho tenyetseha le thepa ea mechinelifilimi tsa PVA. Ntle le li-plasticizers, filimi e ka 'na ea e-ba brittle' me ea atisa ho phunyeha. Li-plasticizers tse tloaelehileng tse sebelisoang hoHo roala filimi ea PVAkenyeletsa:
•Glycerol- Plasticizer e sebelisoang haholo e ntlafatsang ho tenyetseha le ho boloka mongobo.
•Polyethylene Glycol (PEG)- E ntlafatsa elasticity ea filimi mme e thibela ho fokotseha.
•Sorbitol- E matlafatsa ho tšoarella ha e ntse e boloka boemo bo phahameng ba pepeneneng.
Ho khetha plasticizer e nepahetseng ho thusa ho leka-lekanyamatla, pepeneneng, le ho tenyetsehabakeng sa litlhoko tse fapaneng tsa indasteri.
3. Crosslinking Agents - Ho Ntlafatsa ho tšoarella le ho hanyetsa metsi
Lifilimi tsa PVA hangata li hloka li-crosslinking agents hontlafatsa khanyetso ea lik'hemik'hale, botsitso ba mongobo, le matla a mochine. Mahlahana ana a sebetsa ka ho theha maqhama a lik'hemik'hale pakeng tsa liketane tsa polymer, ho etsa hore filimi e be e eketsehilenge tsitsitseng ebile e tšoarella. Li-crosslinking agents tse tloaelehileng li kenyelletsa:
•Borates (Borax)- E ntlafatsa ho tiea ha filimi le thepa ea ho khomarela.
•Glutaraldehyde- E ntlafatsa ho hanyetsa metsi ha o ntse o boloka maemo a bonolo.
•Dicarboxylic acid- E matlafatsa sebopeho sa filimi ntle le ho senya biodegradability.
Motsoako o nepahetseng oa li-crosslinking agents o netefatsa afilimi ea PVA e tšoarellang nako e telele le e sebetsang hantle.
4. Li-Fillers - Ntlafatso ea Lisebelisoa tsa Mechanical le Optical
Ho fetola sebopeho, ponahalo le ts'ebetso ea liaparo tsa filimi tsa PVA,fillershangata li eketsoa. Lisebelisoa tsena li ka ntlafalaopacity ea filimi, matla, le ho boloka litšenyehelo. Tse ling tsa li-fillers tse sebelisoang hangata li kenyelletsa:
•Titanium dioxide (TiO₂)- E fana ka bosoeu le ho hanyetsa UV.
•Silika (SiO₂)- E matlafatsa matla a filimi mme e fokotsa khohlano ea bokaholimo.
•Calcium carbonate (CaCO₃)- E fokotsa litšenyehelo tsa tlhahiso ha u ntse u boloka botšepehi ba lifilimi.
Ho sebelisa li-filler tse nepahetseng ho thusa ho hlophisa lifilimi tsa PVA bakeng salisebelisoa tse khethehileng, joalo ka liphutheloana tse ka senyehang, lifilimi tsa temo, kapa mekotla e qhibilihang ka metsing.
5. Li-surfactants - Ho ntlafatsa Coating Uniformity
Bakeng sa tekano leboreleli ba filimi ea PVA, li-surfactants li bohlokoa. Metsoako enafokotsa tsitsipano ya bokahodimo, ho lumella ho roala ho hasana ka mokhoa o ts'oanang ho pholletsa le libaka. Li-surfactants tsa bohlokoa tse sebelisoang tlhahisong ea lifilimi tsa PVA li kenyelletsa:
•Li-surfactants tse seng tsa ionic- Ntlafatsa ho kolobisa le ho hasana ha filimi.
•Li-surfactants tsa anionic- Ntlafatsa botsitso le thepa ea ho khomarela.
•Li-surfactants tse thehiloeng ho silicone- Fokotsa bofokoli ba bokaholimo le ho ntlafatsa ho tšoana ha filimi.
Khetho e nepahetseng ea surfactant e tiisabotenya bo tsitsitseng ba filimi le boreleli, e leng ea bohlokoa bakeng sa lits'ebetso tse hlokang thepa ea thibelo e nepahetseng.
6. Li-additives - Ntlafatso ea Ts'ebetso le Ts'ebetso
Tlatsetsolitlatsetso tse matlafatsang tshebetsoe ka kenyelletsoa hoLiaparo tsa filimi tsa PVAho fihlela litlhoko tse khethehileng tsa indasteri. Tse ling tsa li-additives tse tloaelehileng li kenyelletsa:
•Li-stabilizers tsa UV- Itšireletse khahlanong le ho senyeha ha khanya ea letsatsi.
•Anti-blocking Agents- Thibela likarolo tsa filimi ho khomarelana nakong ea polokelo.
•Li-antimicrobial Agents- Eketsa bophelo ba sethala sa sehlahisoa ka ho thibela kholo ea baktheria.
Ka ho khetha ka hloko li-additives tse nepahetseng, bahlahisi ba ka khonaetsa lifilimi tsa PVAho ntlafatsa ts'ebeliso ea bona liindasteri tse fapaneng.
Qetello
Boleng le ts'ebetso eaHo roala filimi ea PVAitshetlehile katlhahiso e nepahetseng ea thepa e tala. Ka ho khetha motsoako o nepahetseng oaPVA, plasticizers, crosslinking agents, fillers, surfactants, le additives, bahlahisi ba ka hlahisa lifilimi kaho tšoarella ho phahameng, ho tenyetseha, le ts'ebetso.
U batla litharollo tsa boleng bo holimo tsa lifilimi tsa PVA?IkopanyeJWELLkajenoho hlahloba lisebelisoa tse tsoetseng pele le litharollo tse ncha tsa ho roala tse etselitsoeng litlhoko tsa hau!
Nako ea poso: Apr-02-2025