Ua hōʻike ʻo Waterborne (WB) UV chemistry i ka ulu nui ʻana i nā mākeke lāʻau ʻoihana kūloko no ka mea hāʻawi ka ʻenehana i ka hana maikaʻi loa, nā haʻahaʻa haʻahaʻa haʻahaʻa a me ka hoʻonui ʻana i ka pono hana. Hāʻawi nā ʻōnaehana pale UV i ka mea hoʻohana hope i nā pōmaikaʻi o ke kemika koʻikoʻi a me ke kūʻē ʻana i ka ʻōpala, ke kūpaʻa poloka maikaʻi loa, nā VOC haʻahaʻa loa a me kahi kapuaʻi mea liʻiliʻi me ka liʻiliʻi o ka waiho ʻana. Loaʻa i kēia mau ʻōnaehana nā waiwai i hoʻohālikelike maikaʻi ʻia me nā ʻōnaehana urethane ʻelua ʻāpana me ka ʻole o ka hoʻopiʻi ʻana o nā crosslinkers weliweli a me nā hopohopo ola pot. ʻO ka ʻōnaehana holoʻokoʻa ke kumu kūʻai ma muli o ka hoʻonui ʻana i ka wikiwiki o ka hana a me ka haʻahaʻa haʻahaʻa o ka ikehu. Hiki ke hoʻohana ʻia kēia mau mea maikaʻi no nā noi waho i hoʻohana ʻia e ka hale hana me nā puka makani a me nā pani puka, ka ʻaoʻao a me nā mea wili ʻē aʻe. Hoʻohana maʻamau kēia mau ʻāpana mākeke i nā emulsions acrylic a me nā polyurethane dispersions no ka mea he maikaʻi ko lākou ʻōlinolino a me ka waiho ʻana o ka waihoʻoluʻu, a hōʻike i ka lōʻihi o ka lōʻihi. Ma kēia noiʻi ʻana, ua loiloi ʻia nā resins polyurethane-acrylic me ka hana UV e like me nā kikoʻī o ka ʻoihana no nā noi lāʻau o loko a me waho.
ʻEkolu ʻano o nā mea hoʻoheheʻe i hoʻohana pinepine ʻia i nā noi lāʻau ʻoihana. ʻO ka lacquer Nitrocellulose kahi hui liʻiliʻi haʻahaʻa o ka nitrocellulose a me nā aila a i ʻole nā alkyds e pili ana i ka aila. Ke maloʻo wikiwiki nei kēia mau uhi a loaʻa iā ia ka mana o ka nani. Hoʻohana pinepine ʻia lākou i nā lako hale noho. Loaʻa iā lākou ka pōʻino o ka melemele me ka manawa a hiki ke lilo i palupalu. Loaʻa iā lākou ke kūʻē kemika maikaʻi ʻole. Loaʻa nā VOC kiʻekiʻe loa i nā lacquers Nitrocellulose, maʻamau ma 500 g/L a i ʻole. ʻO nā lacquers pre-catalyzed he hui ia o nitrocellulose, aila a i ʻole alkyds i hoʻokumu ʻia i ka aila, plasticizers a me ka urea-formaldehyde. Hoʻohana lākou i kahi mea hoʻoheheʻe waika nāwaliwali e like me ka butyl acid phosphate. He ʻehā mahina ke ola o kēia mau uhi. Hoʻohana ʻia lākou ma ke keʻena, nā lako hale a me nā hale noho. ʻOi aku ka maikaʻi o ka pale kemika ma mua o nā lacquers nitrocellulose. Loaʻa iā lākou nā VOC kiʻekiʻe loa. ʻO nā varnish hoʻololi i hui pū ʻia me nā alkyds kumu ʻaila, urea formaldehyde a me ka melamine. Hoʻohana lākou i kahi mea hoʻoheheʻe waikawa ikaika e like me ka p-toluene sulfonic acid. Loaʻa iā lākou ke ola o ka ipuhao mai 24 a 48 mau hola. Hoʻohana ʻia lākou i loko o ke keʻena kīhini, nā lako keʻena a me nā noi hale noho. Loaʻa i nā ʻāpana hoʻololi nā waiwai maikaʻi loa o nā ʻano ʻekolu o nā pale i hoʻohana ʻia no ka lāʻau ʻoihana. Loaʻa iā lākou nā VOC kiʻekiʻe loa a me nā puka formaldehyde.
Hiki i nā emulsions acrylic crosslinking ma muli o ka wai a me nā dispersion polyurethane ke koho maikaʻi loa i nā huahana hoʻoheheʻe no nā noi lāʻau ʻoihana. Hāʻawi nā emulsions Acrylic i ke kemika maikaʻi loa a me ka pale ʻana i ka pale, nā waiwai ʻoi aku ka paʻakikī, ke kūpaʻa maikaʻi ʻole a me ka ʻoluʻolu, a me ka hoʻopili maikaʻi ʻana i nā ʻili porous. Loaʻa iā lākou nā manawa maloʻo wikiwiki, e hiki ai i ke keʻena keʻena, nā lako a i ʻole nā mea hana hale ke lawelawe i nā ʻāpana ma hope koke o ka noi. Hāʻawi nā PUD i ke kūpaʻa abrasion maikaʻi loa, ka maʻalahi, a me ka pale ʻana a me ka pale ʻana. He mau hoa hui maikaʻi lākou me nā emulsions acrylic e hoʻomaikaʻi i nā waiwai mechanical. Hiki i nā emulsion 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 pale wai hiki ke ho'ōla i ka wai i nā koho kaulana no nā noi lāʻau ʻoihana. Ke koho nei nā hale lole kīhini a me nā mea hana hale i kēia mau uhi no ka mea he kūpaʻa maikaʻi lākou a me nā waiwai mechanical, nā waiwai noi maikaʻi a me nā hoʻokuʻu haʻahaʻa haʻahaʻa loa. Loaʻa i ka WB UV coatings ke kūpaʻa maikaʻi loa ma hope o ka hoʻōla ʻana, e hiki ai i nā ʻāpana i uhi ʻia ke hoʻopaʻa ʻia, hoʻopaʻa ʻia a hoʻouna ʻia mai ka laina hana me ka manawa ʻole no ka hoʻomohala ʻana i ka paʻakikī. ʻO ka hoʻomohala ʻana i ka paʻakikī i ka uhi WB UV he mea kupaianaha a hiki i kekona. ʻOi aku ka maikaʻi o ka pale kemika a me ka ʻeleʻele o ka WB UV coatings ma mua o ka hoʻololi ʻana i ka solvent-based varnish.
He nui nā pono kūpono o ka uhi WB UV. ʻOiai ʻo 100%-solid UV oligomers ka mea maʻamau i ka viscosity a pono e hoʻoheheʻe ʻia me ka reactive diluents, WB UV PUDs haʻahaʻa i ka viscosity, a hiki ke hoʻoponopono ʻia ka viscosity me nā mea hoʻololi WB rheology kuʻuna. He paona molekala kiʻekiʻe ko WB UV PUD a ʻaʻole kūkulu i ke kaumaha molekala ke hoʻōla nui lākou e like me ka 100% paʻa UV paʻa. No ka mea he liʻiliʻi a ʻaʻohe liʻiliʻi i ko lākou hoʻōla ʻana, ʻoi aku ka maikaʻi o ka WB UV PUDs i nā substrate he nui. Hiki ke hoʻomalu ʻia ka ʻōlinolino o kēia mau uhi me nā mea moena kuʻuna. Hiki i kēia mau polymers ke paʻakikī akā hiki ke maʻalahi, e hoʻolilo iā lākou i mau moho kūpono no nā uhi lāʻau waho.
Ka manawa hoʻouna: Mar-07-2024
