Polyvinyl mowa

Polyvinyl mowa ndi kupanga polima amene mosavuta sungunuka m'madzi. Iwo anali analandira mu 1924 akatswiri awiri - Gonelem ndi Germany - ndi thandizo la saponification anachita.

thupi katundu

Polyvinyl mowa - ufa woyera, ndi luso kupanga filimu. polima Ichi ndi amphamvu kwambiri ndi kusintha, koma popeza izi zimadalira khalidwe chinyezi (izo zimatenga madzi), ndi kulimba kwamakokedwe amachepetsa, ndi ductility lalikulu kumachitika pamene pamlingo winawake chinyezi. Ilo liri ndi katundu hygroscopic, izo mosavuta kusungunuka (makamaka madzi). Mu mankhwala ndiponso monga mafuta ndi mafuta, si amatha kupasuka. Pamene ntchito mankhwala alibe zotsatira poizoni, choncho tinganene kuti vuto lililonse.

kupeza mowa

Polyvinyl mowa kapena PVA zakonzedwa ku polyvinyl nthochi ndi hydrolysis kapena alcoholysis ndi kutulutsa mu mawonekedwe a granules kapena ufa. njira zosiyanasiyana zamakono, kuchokera ku zocholoŵana ndithu ndi nthawi yambiri ntchito yokonza PVA.

Polyvinyl mowa - kugwiritsa ntchito

PVA tsopano ntchito kwambiri. Iye akhoza kuimba udindo wa thickener ndi kupanga zomatira ndi mankhwala ochapira tsitsi, ungatithandize zakuthupi lalabala. Iwo bwino ntchito kubwezeretsa lokonza wa zojambula. Chifukwa katundu hygroscopic, izo chimagwiritsidwa ntchito mu chilengedwe njira zaukhondo. Mitundu yonse ya matewera, tampons ndi mapadi anapangidwa ntchito PVA. Musaiwale polyvinyl mowa, komanso alimi chakudya. Izo ntchito monga emulsifier kupanga mayonesi, sauces, ketchups ndi mankhwala ena chakudya, ndi amagwiritsidwanso ntchito ngati amakambirana enhancer Confectionery.

mankhwala amakono, nayenso, anatengera zina za katundu wa PVA. Ndi ntchito kupanga mankhwala ena, pamaso akugonjera izo bwinobwino kutsukidwa ku zodetsa. Ophthalmologists polyvinyl mowa ntchito yokonza ya madontho diso ndi monga girizi magalasi kukhudzana. Ngakhale oncologists apeza ntchito pa matenda a PVA khansa. Kwenikweni, chofunika kuchita sanali opaleshoni embolization ndondomeko. Ndipo si uthunthu wonse wa ntchito polyvinyl mowa mankhwala.

Makampani nsalu PVA ntchito kuchotsa magetsi malo amodzi, ndi pepala - kwa pepala yobwezeretsanso. Komanso ndi kofunika kwambiri chigawo chimodzi cha zamkati mphero. Polyvinyl mowa ndi omanga ofunika ndi metallurgists, ofufuta zikopa ndi opanga utoto ndi vanishi. zomera zonse popanga ulusi yokumba ntchito kupanga PVA, amene amawapatsa mphamvu ndi ndondomeko ulusi sizing.

Ngakhale sayansi zoterozo tizilombo tosaoneka ndi maso wagwiritsa ntchito PVA mu immobilization wa michere ndi maselo. Polyvinyl mowa ndipo anapeza ntchito yosindikiza, yosindikiza makamaka chophimba. M'munda uwu ntchito monga polima wosanjikiza kwa ndondomeko kukopera. Thiabendazole angagwiritsidwe ntchito komanso ngati ma CD kapena zinthu zoteteza kupanga zigawo ❖ kuyanika chifukwa chakuti wosanjikiza PVA mosavuta kuchotsedwa.

Zotsimikizira makampani ndi kugwiritsa nkhungu amagwiritsidwanso ntchito ndi kupambana, polima izi. PVA tsopano kukhala wamba mu chuma. Lilipo pa mtengo kuti n'zosavuta zoyendera (kawirikawiri mu mapepala apulasitiki, odzaza mu matumba pepala) mu zoyendera chatsekedwa kuti kupewa yonyowa. Popeza polyvinyl mowa ndi flammable, m'pofunika kutsatira malamulo chitetezo pa yosungirako ndi kulipira.