I-Polyvinyl alcohol (PVA) ipowder yipolymer eyenziwe ngamanzi e-soluble enoluhlu olubanzi lwezicelo kumashishini ahlukeneyo.Yilayini, i-polymeric impahla eyenziwe kwi-hydrolysis ye-polyvinyl acetate (PVAc).Iqondo le-hydrolysis (DH) ye-PVA imisela ukunyibilika kwayo emanzini, kunye namaxabiso aphezulu e-DH ebonisa ukunyibilika okuphezulu.I-PVA powder ifumaneka kumabakala ahlukeneyo, kuxhomekeke kwixabiso le-DH kunye nobunzima be-molecular.

Iipropathi zePVA powder PVA powder zineepropati ezininzi ezizodwa ezenza ukuba kube yinto ethandwayo kwizicelo ezininzi.Ezinye zezi propati ziquka:

1. Ukunyibilika kwamanzi: I-PVA powder i-soluble kakhulu emanzini, yenza kube lula ukunyibilika emanzini ukwenza isisombululo esicacileyo.
2. Ukwenziwa kwefilimu: Umgubo wePVA unokwenza ifilimu ecacileyo, eguquguqukayo, kwaye eyomeleleyo xa inyibilika emanzini ize yomiswe.
3. Ukubambelela: Ipowder ye-PVA inokubambelela kwiindawo ezahlukeneyo, okwenza kube yinto eyaziwayo kwi-adhesives.
4. I-Biodegradability: I-powder ye-PVA i-biodegradable, ithetha ukuba inokuchithwa ngeenkqubo zendalo.

Ukusetyenziswa kwePVA powder

1. I-Adhesives: I-PVA powder isetyenziswa ngokuqhelekileyo njengenxalenye ephambili kwi-adhesives.Isetyenziselwa ukuveliswa kweglue yokhuni, iglu yephepha, kunye ne-textile adhesives.I-adhesive ye-PVA ilungele ukubopha iindawo ezinamaqhekeza, njengephepha, ikhadibhodi kunye neenkuni.
2. Ukupakisha: I-PVA powder isetyenziselwa ukuveliswa kwezinto zokupakisha ezifana neefilimu kunye neengubo.Ifilimu eyenziwe ngomgubo wePVA inamandla aphezulu okuqina, iipropathi ezilungileyo zokuthintela igesi, kunye nokucaca kakuhle kwe-optical.
3. Umzi-mveliso welaphu: Umgubo wePVA usetyenziswa kumzi mveliso welaphu ukuvelisa ii-agent zokulinganisa umsonto kunye namalaphu.Isetyenziselwa ukwandisa amandla kunye nokuqina komsonto okanye ilaphu, ukwenza kube lula ukuluka kunye nokuphatha.
4. Ishishini lephepha: I-PVA powder isetyenziswe kwishishini lephepha njenge-additive-end additive.Isetyenziselwa ukuphucula amandla, ukunganyangeki kwamanzi, kunye nokuprintwa kwephepha.
5. Ishishini lokwakha: I-PVA powder isetyenziswa kwishishini lokwakha njenge-binder ye-samente kunye nezinye izinto zokwakha.Ikwasetyenziswa njengento yokugquma imiphezulu yekhonkrithi ukuphucula ukuxhathisa kwamanzi.
6. Iimveliso zokhathalelo lomntu: Umgubo wePVA usetyenziswa kwiimveliso zokhathalelo lomntu ezifana nezitshizi zeenwele, iishampu, kunye neegel.Isetyenziswe njengefilimu-yangaphambili kunye ne-thickener ukuphucula ukuthungwa kunye nokusebenza kwezi mveliso.
7. Ishishini lezonyango: I-PVA powder isetyenziswe kwishishini lezonyango ukuvelisa i-hydrogels, iingubo zenxeba, kunye neenkqubo zokuhanjiswa kweziyobisi.I-biocompatibility kunye ne-solubility yamanzi ye-PVA yenza kube yinto efanelekileyo kwezi zicelo.

Iindidi ze-PVA ze-powder powder ze-PVA zifumaneka kumabakala ahlukeneyo, kuxhomekeke kwixabiso layo le-DH kunye nobunzima be-molecular.Ixabiso le-DH le-PVA powder livela kwi-87% ukuya kwi-99%.Ixabiso eliphezulu le-DH, i-powder ye-PVA i-soluble yamanzi.I-molecular weight of PVA powder ranges ukusuka kumawaka amaninzi ukuya kwizigidi ezininzi.

1. I-PVA powder egcwele i-hydrolyzed: Olu hlobo lwe-PVA powder lunexabiso le-DH le-99% okanye ngaphezulu.Inyibilika kakhulu emanzini kwaye ineempawu ezibalaseleyo zokwenza ifilim.Isetyenziswa ngokuqhelekileyo kwizicelo ezifana nokuncamathelisa, ukupakishwa, kunye namalaphu.
2. Ingxenye ye-PVA powder ye-hydrolyzed: Olu hlobo lwe-PVA powder lunexabiso le-DH ukusuka kwi-87% ukuya kwi-98%.Ayinyibiliki kangako emanzini kunomgubo wePVA we-hydrolyzed ngokupheleleyo kwaye ineempawu ezisezantsi zokwenza ifilim.Ngokuqhelekileyo isetyenziswe kwizicelo ezifana nephepha kunye nokwakhiwa.