PVA guluu woyera

PVA guluu ndi chidule cha Polyvinyl acetate.Maonekedwe ndi ufa woyera.Ndi mtundu wa polima wosungunuka m'madzi wokhala ndi ntchito zosiyanasiyana.Kuchita kwake kuli pakati pa pulasitiki ndi mphira.Ntchito zake zitha kugawidwa m'magulu awiri akuluakulu: fiber ndi non-fiber.Chifukwa PVA ili ndi zomatira zamphamvu zapadera, kusinthasintha kwa filimu, kusalala, kukana mafuta, kukana zosungunulira, colloid zoteteza, chotchinga mpweya, kukana abrasion ndi kukana madzi ndi chithandizo chapadera, sikuti chimangogwiritsidwa ntchito ngati fiber yaiwisi, komanso chimagwiritsidwa ntchito kwambiri kupanga zokutira, zomatira, othandizira mapepala, ma emulsifiers, dispersants, mafilimu ndi zinthu zina, ndi ntchito zophimba nsalu, chakudya, mankhwala, zomangamanga, matabwa, kupanga mapepala, kusindikiza, ulimi, zitsulo, makampani opanga mankhwala a Polima ndi mafakitale ena.
Poyerekeza ndi zomatira zofanana pamsika, ilibe zinthu zapoizoni monga formaldehyde (pogwiritsa ntchito urea-formaldehyde resin kapena melamine resin kapena madzi osungunuka a phenolic resin omwe amatha kufikira chitetezo cha chilengedwe E2 kapena kupitilira apo. zitha kukhala zoonjezera Kuchepetsa zomwe zili mu formaldehyde yaulere), osaipitsa malo opangira ndikugwiritsa ntchito, mtengo wotsika, njira yosavuta, yolumikizana bwino, kuyanika mwachangu komanso kuthamanga kwamphamvu.Amagwiritsidwa ntchito popanga mapanelo opangidwa ndi matabwa popanda kukanikiza kotentha ndipo ali ndi zabwino zambiri pakupulumutsa mphamvu.
Makasitomala ambiri tsopano amagwiritsa ntchito PVA yoyera latex kupanga slimes.Ichi ndi chimodzi mwazinthu zazikulu zogwiritsira ntchito guluu PVA.M’mayiko ena ku Ulaya ndi ku America, anthu ambiri amaphunzitsa ana awo maphunziro a pulaimale.Zinthu zake sizowopsa komanso zachilengedwe, kotero palibe chifukwa chodera nkhawa ngati guluu lingawononge ana.