Hiki iā hypromellose ke hoʻololi i ka hydroxyethyl cellulose i ka pena pōhaku maoli

Loaʻa nā huahana cellulose mai ka pulupulu pulupulu maoli a i ʻole pulp lāʻau e ka etherification. Hoʻohana nā huahana cellulose ʻokoʻa i nā mea etherifying ʻokoʻa. Hoʻohana ʻo Hypromellose HPMC i nā ʻano mea etherifying ʻē aʻe (chloroform a me 1,2-epoxypropane), ʻoiai ka hydroxyethyl cellulose HEC e hoʻohana ana i nā mea hoʻoheheʻe Oxirane. Hiki ke hoʻohana ʻia ʻo Hydroxyethyl cellulose e like me ka mānoanoa i ka pena pōhaku maoli a me ka pena latex. Ma muli o ka nui o ka aggregate, umekaumaha kikoʻī, ua, pono ia e hoʻohui i ka mānoanoa e hoʻonui i kona viscosity, i mea e hoʻokō ai i nā pono o ke kūkulu ʻana i ka viscosity, a hoʻomaikaʻi i kona kūpaʻa mālama ʻana, a e hoʻokō i kahi ikaika. No ka loaʻa ʻana o ka ikaika maikaʻi, ke kūpaʻa wai maikaʻi a me ka pale ʻana i ka wā, he mea nui ke koho ʻana i nā mea maka a me ka hoʻolālā ʻana.

Ma keʻano laulā, ʻoi aku ka nui o ka emulsion pena pōhaku maoli kiʻekiʻe. No ka laʻana, hiki ke loaʻa i kahi ton o ka pena pōhaku maoli he 300 kg o ka emulsion acrylic maʻemaʻe a me 650 kg o ke one pōhaku maoli. Inā he 50% ka mea paʻa o ka emulsion, ʻo ka nui o ka emulsion 300 kg ma hope o ka maloʻo ʻana ma kahi o 150 lita, 650 Kg o ke one ma kahi o 228 lita. ʻO ia hoʻi, i kēia manawa ka PVC (pigment volume concentration) o ka pena pōhaku maoli he 60% , no ka mea, he nui nā ʻāpana o ke one kala a ʻaʻole i maʻamau i ke ʻano, ma lalo o ke ʻano o kahi puʻupuʻu nui, ma hope o ka maloʻo. ka pena pōhaku maoli paha i loko o ka CPVC (koʻikoʻi pigment volume concentration) e pili ana. No ka mānoanoa, inā koho ʻia ka viscosity kūpono o ka cellulose, hiki ke hana ʻia kahi kiʻiʻoniʻoni piha a paʻa loa e hoʻokō i nā koi hana nui ʻekolu o ka pena pōhaku maoli. Inā haʻahaʻa ka maʻiʻo o ka emulsion, ua ʻōlelo ʻia e hoʻohana i ka viscosity kiʻekiʻe o ka cellulose ma ke ʻano he mānoanoa (eg 100,000 viscosity), ʻoi aku ma hope o ka piʻi ʻana o ke kumukūʻai o ka cellulose, hiki ke hoʻemi i ka nui o ka cellulose i hoʻohana ʻia, hiki nō hoʻi i ka hana. o ka pena pohaku maoli i oi aku ka oi. Ua hoʻololi kekahi mau mea hana i nā pena pōhaku maoli haʻahaʻa i ka hydroxyethyl cellulose me ka hypromellose ma muli o ke kumukūʻai a me nā manaʻo ʻē aʻe. Hoʻohālikelike ʻia me nā ʻano cellulose ʻelua, ʻoi aku ka maikaʻi o ka hydroxyethyl cellulose i ka paʻa ʻana i ka wai, ʻaʻole e nalowale ka wai paʻa ma muli o ka gel i ke kiʻekiʻe wela, a he kūʻē i ka maʻi. No ka hana, ua ʻōlelo ʻia e hoʻohana i ka 100,000 viscosity hydroxyethyl cellulose e like me ka mānoanoa o ka pena pōhaku maoli.