Ua hōʻike ka kemika UV Waterborne (WB) i ka ulu nui ʻana ma nā mākeke lāʻau ʻoihana kūloko no ka mea hāʻawi ka ʻenehana i ka hana maikaʻi loa, nā hoʻokuʻu solvent haʻahaʻa a me ka hoʻonui ʻana i ka pono hana. Hāʻawi nā ʻōnaehana uhi UV i ka mea hoʻohana hope i nā pono o ke kūpaʻa kemika a me ke kahakaha maikaʻi loa, ke kūpaʻa poloka maikaʻi loa, nā VOC haʻahaʻa loa a me kahi kapuaʻi lako liʻiliʻi me ka liʻiliʻi o ka wahi mālama e pono ai. Loaʻa i kēia mau ʻōnaehana nā waiwai e hoʻohālikelike maikaʻi ʻia me nā ʻōnaehana urethane ʻelua ʻāpana me ka ʻole o nā pilikia o nā crosslinkers weliweli a me nā hopohopo ola pot. He kūpono ke kumukūʻai o ka ʻōnaehana holoʻokoʻa ma muli o ka hoʻonui ʻia o ka wikiwiki o ka hana ʻana a me nā kumukūʻai ikehu haʻahaʻa. Hiki i kēia mau pono like ke pōmaikaʻi no nā noi waho i hoʻopili ʻia e ka hale hana me nā puka makani a me nā puka puka, ka ʻaoʻao a me nā hana wili ʻē aʻe. Hoʻohana maʻamau kēia mau ʻāpana mākeke i nā emulsions acrylic a me nā dispersions polyurethane no ka mea he ʻōlinolino maikaʻi loa a me ka paʻa ʻana o ke kala, a hōʻike i ka lōʻihi kiʻekiʻe. Ma kēia haʻawina, ua loiloi ʻia nā resins polyurethane-acrylic me ka hana UV e like me nā kikoʻī ʻoihana no nā noi lāʻau ʻoihana kūloko a me waho.
ʻEkolu ʻano o nā uhi hoʻoheheʻe i hoʻohana pinepine ʻia i nā noi lāʻau ʻoihana. ʻO ka lacquer Nitrocellulose maʻamau he hui haʻahaʻa-paʻa o ka nitrocellulose a me nā aila a i ʻole nā alkyds i hoʻokumu ʻia i ka aila. Hoʻomaloʻo koke kēia mau uhi a he kiʻekiʻe ka hiki ke hoʻomālamalama. Hoʻohana pinepine ʻia lākou i nā noi lako hale noho. Loaʻa iā lākou ka hemahema o ka melemele me ka manawa a hiki ke lilo i mea palupalu. Loaʻa iā lākou ke kūpaʻa kemika maikaʻi ʻole. Loaʻa i nā lacquers Nitrocellulose nā VOC kiʻekiʻe loa, maʻamau ma 500 g/L a ʻoi aku paha. ʻO nā lacquers pre-catalyzed he mau hui o ka nitrocellulose, nā aila a i ʻole nā alkyds i hoʻokumu ʻia i ka aila, nā plasticizers a me ka urea-formaldehyde. Hoʻohana lākou i kahi mea hoʻoulu waikawa nāwaliwali e like me ka butyl acid phosphate. Loaʻa i kēia mau uhi kahi ola papa ma kahi o ʻehā mahina. Hoʻohana ʻia lākou i loko o ke keʻena, nā hale hana a me nā hale noho. ʻOi aku ka maikaʻi o nā lacquers pre-catalyzed i nā kūpaʻa kemika ma mua o nā lacquers nitrocellulose. Loaʻa iā lākou nā VOC kiʻekiʻe loa. ʻO nā varnishes hoʻololi he mau hui o nā alkyds i hoʻokumu ʻia i ka aila, urea formaldehyde a me melamine. Hoʻohana lākou i kahi mea hoʻoulu waikawa ikaika e like me ka p-toluene sulfonic acid. He 24 a 48 mau hola ko lākou ola i loko o ka ipu hao. Hoʻohana ʻia lākou i loko o nā keʻena kīhini, nā lako keʻena a me nā lako hale noho. Loaʻa i nā varnish hoʻololi nā waiwai maikaʻi loa o nā ʻano ʻekolu o nā uhi solvent-based i hoʻohana pinepine ʻia no ka lāʻau ʻoihana. Loaʻa iā lākou nā VOC kiʻekiʻe loa a me nā hoʻokuʻu formaldehyde.
Hiki i nā emulsions acrylic crosslinking ponoʻī i hoʻokumu ʻia i ka wai a me nā dispersions polyurethane ke lilo i mau koho maikaʻi loa i nā huahana solvent-based no nā noi lāʻau ʻoihana. Hāʻawi nā emulsions acrylic i ke kūpaʻa kemika a me ka poloka maikaʻi loa, nā waiwai paʻakikī kiʻekiʻe, ka lōʻihi a me ka hiki ke hoʻololi i ka wā, a me ka hoʻopili maikaʻi ʻana i nā ʻili ʻaʻole porous. Loaʻa iā lākou nā manawa maloʻo wikiwiki, e hiki ai i ka mea hana keʻena, nā lako hale a i ʻole nā mea hana hale ke lawelawe i nā ʻāpana ma hope koke o ka hoʻopili ʻana. Hāʻawi nā PUD i ke kūpaʻa abrasion maikaʻi loa, ka maʻalahi, a me ke kūpaʻa ʻana i ka ʻōpala a me ka mar. He mau hoa hui maikaʻi lākou me nā emulsions acrylic e hoʻomaikaʻi i nā waiwai mechanical. Hiki i nā emulsions acrylic a me nā PUD ke hana me nā kemika crosslinking e like me polyisocyanates, polyaziridine a i ʻole carbodiimides e hana i nā uhi 2K me nā waiwai i hoʻomaikaʻi ʻia.
Ua lilo nā uhi UV-curable i lawe ʻia mai ka wai i mau koho kaulana no nā noi lāʻau ʻoihana. Koho nā mea hana keʻena kīhini a me nā lako hale i kēia mau uhi no ka mea he kūpaʻa maikaʻi loa ko lākou a me nā waiwai mechanical, nā waiwai noi maikaʻi loa a me nā hoʻokuʻu solvent haʻahaʻa loa. Loaʻa i nā uhi UV WB ke kūpaʻa poloka maikaʻi loa ma hope koke o ka hoʻōla ʻana, kahi e hiki ai ke hoʻopaʻa ʻia, hoʻopili ʻia a hoʻouna pololei ʻia nā ʻāpana i uhi ʻia mai ka laina hana me ka ʻole o ka manawa noho no ka hoʻomohala ʻana i ka paʻakikī. He mea koʻikoʻi ka hoʻomohala ʻana o ka paʻakikī i ka uhi UV WB a hana ʻia i loko o kekona. ʻOi aku ka maikaʻi o ke kūpaʻa kemika a me ka ʻōpala o nā uhi UV WB ma mua o nā varnish hoʻololi solvent-based.
He nui nā pono o nā uhi UV WB. ʻOiai ʻo nā oligomers UV 100%-paʻa he kiʻekiʻe ka viscosity a pono e hoʻoheheʻe ʻia me nā diluents reactive, haʻahaʻa ka viscosity o nā WB UV PUD, a hiki ke hoʻoponopono ʻia ka viscosity me nā mea hoʻololi rheology WB kuʻuna. Loaʻa i nā WB UV PUD kahi kaumaha molekala kiʻekiʻe i ka wā mua a ʻaʻole kūkulu i ke kaumaha molekala i ko lākou hoʻōla ʻana e like me 100% mau uhi UV paʻa. No ka mea he liʻiliʻi a ʻaʻohe paha o lākou shrinkage i ko lākou hoʻōla ʻana, loaʻa i nā WB UV PUDs ka hoʻopili maikaʻi loa i nā substrates he nui. Hiki ke hoʻomalu maʻalahi ʻia ka ʻōlinolino o kēia mau uhi me nā mea hana matting kuʻuna. Hiki i kēia mau polymers ke paʻakikī loa akā hiki ke loli loa, e lilo ana iā lākou i mau moho kūpono no nā uhi lāʻau o waho.
Ka manawa hoʻouna: Malaki-07-2024
