PVA Production process uye Wide Application

Polyvinyl Doro (PVA) imhando yepolymer yakagadzirwa kuburikidza nepolymerization yevinyl acetate inoteverwa nehydrolysis. Heino tarisiro yePVA yekugadzira maitiro uye yakafara mashandisiro ayo:

Kugadzira Maitiro:

1. Polymerization yeVinyl Acetate:
   • Vinyl acetate monomers inoitwa polymerized uchishandisa yemahara-radical initiator pamberi peinonyungudutsa kana semulsion. Iyi nhanho inoguma mukuumbwa kwepolyvinyl acetate (PVAc), chena, inonyungudika nemvura polima.
2. Hydrolysis yePolyvinyl Acetate:
   • Iyo PVAc polymer ine hydrolyzed nekuibata nealkaline solution (senge sodium hydroxide) pasi pemamiriro ekudzora. Iyi hydrolysis reaction inotsemura mapoka eacetate kubva kumusana wepolymer, zvichikonzera kuumbwa kwepolyvinyl doro (PVA).
3. Kuchenesa uye Kuomesa:
   • Iyo PVA mhinduro inotora matanho ekuchenesa kubvisa tsvina uye isina kubatwa monomers. Iyo yakacheneswa PVA mhinduro inoomeswa kuti iwane yakasimba PVA flakes kana hupfu.
4. Kuwedzera Kugadziridza:
   • Iyo PVA flakes kana hupfu inogona kuwedzeredzwa kugadziridzwa kuita akasiyana siyana senge magranules, pellets, kana mhinduro, zvichienderana nekwakagadzirirwa kushandiswa.

Wide Applications:

1. Adhesives uye Binders:
   • PVA inowanzoshandiswa sebhainda mune zvinonamira, kusanganisira matanda guruu, pepa guruu, uye machira anonamira. Inopa kunamatira kwakasimba kune akasiyana substrates uye inopa yakanakisa firimu-kugadzira zvivakwa.
2. Micheka uye Fibers:
   • PVA faibha dzinoshandiswa mukugadzira machira senge kuruka, kuruka, uye machira asina kuruka. Ivo vanoratidza zvimiro zvakaita senge yakakwira tensile simba, abrasion resistance, uye kugadzikana kwemakemikari.
3. Pepa Coatings uye Kukura:
   • PVA inoshandiswa mumapepa ekuputira uye saizi maumbirwo ekuvandudza kutsetseka kwepamusoro, kudhinda, uye kunamatira inki. Inowedzera simba uye kusimba kwezvigadzirwa zvemapepa.
4. Zvekuvaka:
   • PVA-yakavakirwa maumbirwo anoshandiswa mukuvaka zvinhu zvakadai sedhaka rinowedzera, mataira anonamira, uye simende machira. Vanovandudza kushanda, kunamatira, uye kusimba kwezvigadzirwa zvekuvaka.
5. Packaging Mafirimu:
   • Mafirimu ePVA anoshandiswa kurongedza maapplication nekuda kweakanakisa chipingamupinyi zvivakwa, hunyoro kuramba, uye biodegradability. Iwo anoshandiswa mukutakura chikafu, mafirimu ekurima, uye hunyanzvi hwekurongedza maapplication.
6. Cosmetics uye Personal Care Zvigadzirwa:
   • PVA inoshandiswa muzvizoro uye zvigadzirwa zvekuchengeta munhu senge vhudzi rekugadzira gels, makirimu, uye mafuta ekuzora. Inopa firimu-kugadzira zvimiro, kukora, uye kudzikamisa mhedzisiro.
7. Zvekurapa uye Zvemishonga Zvishandiso:
   • PVA inoshandiswa mune zvekurapa uye zvemishonga zvikumbiro senge masisitimu ekuendesa zvinodhaka, machira ekupfeka, uye ekubata lens machira. Iyo biocompatible, isina-chepfu, uye inoratidza yakanakisa kunyungudika kwemvura.
8. Indasitiri Yezvekudya:
   • PVA inoshandiswa sekuwedzera kwechikafu mumashandisirwo akasiyana-siyana akadai semafirimu anodyiwa, encapsulation yezvinonhuhwira kana zvinovaka muviri, uye seyakakora mumiriri muzvigadzirwa zvekudya. Inoonekwa seyakachengeteka kudyiwa nevanhu.

Muchidimbu, Polyvinyl Doro (PVA) ipolymer inoshanda zvakasiyana-siyana ine huwandu hwekushandisa mumaindasitiri akadai seanonamira, machira, mapepa, kuvaka, kurongedza, zvekuzora, zvekurapa, zvemishonga, uye chikafu. Hunhu hwayo hwakasiyana hunoita kuti ive yakakodzera kune akasiyana maapplication anoda firimu-kuumba, adhesive, kusunga, chipingamupinyi, uye inonyungudika mvura.