Pono nā mea mānoanoa no nā pena latex ke kūpono maikaʻi me nā pūhui polimer latex, i ʻole e liʻiliʻi ke ʻano o ke ʻano i loko o ke kiʻi ʻoniʻoni, a hiki ke hoʻohui ʻia ka mea hiki ʻole ke hoʻololi ʻia, e hopena i ka emi ʻana o ka viscosity a me ka nui o ka nui. E hoʻololi nā Thickeners i ka uku o ka emulsion. No ka laʻana, e loaʻa i nā mea mānoanoa cationic kahi hopena hiki ʻole ke hoʻihoʻi ʻia i nā emulsifier anionic a hoʻoulu i ka demulsification. Pono e loaʻa i kahi mānoanoa pena latex kūpono kēia mau waiwai:
1. Haʻahaʻa haʻahaʻa a me ka viscosity maikaʻi
2. ʻO ke kūpaʻa mālama maikaʻi, ʻaʻole e hōʻemi i ka viscosity ma muli o ka hana a nā enzymes, a ʻaʻole e hoʻemi i ka viscosity ma muli o nā loli o ka mahana a me ka waiwai pH
3. Paʻa wai maikaʻi, ʻaʻohe ʻōhū ea maopopo
4. ʻAʻohe hopena ʻaoʻao ma nā waiwai kiʻi pena e like me ka pale ʻana i ka scrub, ka ʻālohilohi, ka mana huna a me ka pale wai
5. ʻAʻohe flocculation o nā puaʻa
ʻO ka ʻenehana mānoanoa o ka pena latex he ana koʻikoʻi ia e hoʻomaikaʻi ai i ka maikaʻi o ka latex a hoʻemi i nā kumukūʻai. ʻO ka Hydroxyethyl cellulose kahi mānoanoa kūpono, nona nā hopena multifunctional i ka mānoanoa, stabilization a me ka hoʻoponopono rheological o ka pena latex.
I ke kaʻina hana o ka pena latex, hoʻohana ʻia ka hydroxyethyl cellulose (HEC) ma ke ʻano he dispersant, thickener a me ka pigment suspending agent e hoʻopaʻa i ka viscosity o ka huahana, e hōʻemi i ka agglomeration, e hoʻomaʻamaʻa i ka kiʻi pena a me ka maʻalahi, a e hoʻolōʻihi i ka pena latex. . ʻO ka rheology maikaʻi, hiki ke kū i ka ikaika shear kiʻekiʻe, a hiki ke hāʻawi i ka pae maikaʻi, ka pale ʻana a me ka like ʻana o ka puaʻa. Ma ka manawa like, he hana maikaʻi loa ka HEC, a he pseudoplasticity ka pena latex me HEC, no laila, ʻo ka pulupulu, ka ʻōwili ʻana, ka hoʻopiha ʻana, ka pulupulu a me nā ʻano hana hana ʻē aʻe i loaʻa nā pōmaikaʻi o ka mālama ʻana i ka hana, ʻaʻole maʻalahi e hoʻomaʻemaʻe, sag, a emi ʻole ka splashing. He hoʻomohala kala maikaʻi loa ka HEC. Loaʻa iā ia ka miscibility maikaʻi loa no ka hapa nui o nā kala a me nā mea hoʻopaʻa, ʻo ia ka mea e loaʻa ai i ka pena latex ke kūlike a me ke kūpaʻa. ʻO ka versatility no ka noi ʻana i nā formulations, he ether non-ionic. No laila, hiki ke hoʻohana ʻia i kahi ākea pH ākea (2 ~ 12), a hiki ke hoʻohui ʻia me nā mea i loko o ka pena latex maʻamau e like me ka reactive pigments, additives, soluble salts a electrolytes.
ʻAʻohe hopena maikaʻi ʻole i ke kiʻi ʻoniʻoni, no ka mea, ʻo ka HEC aqueous solution he mau hiʻohiʻona o ka ʻili o ka wai, ʻaʻole maʻalahi ka huʻa i ka wā o ka hana ʻana a me ke kūkulu ʻana, a ʻoi aku ka liʻiliʻi o nā lua pele a me nā pinholes.
Paʻa mālama maikaʻi. I ka wā mālama lōʻihi, hiki ke mālama ʻia ka dispersibility a me ka hoʻokuʻu ʻana o ka puaʻa, ʻaʻohe pilikia o ka waihoʻoluʻu a me ka pua. He wahi wai liʻiliʻi ma ka ʻili o ka pena, a ke loli nui ka mahana mālama. Paʻa mau kona viscosity.
Hiki i ka HEC ke hoʻonui i ka waiwai PVC (pigment volume concentration) solid composition a hiki i 50-60%. Eia kekahi, hiki ke hoʻohana i ka HEC i ka uhi uhi mānoanoa o ka pena wai.
I kēia manawa, lawe ʻia nā mea mānoanoa i hoʻohana ʻia i loko o ka home a me nā pena latex kiʻekiʻe he HEC a me ka polymer acrylic (me ka polyacrylate, homopolymer a i ʻole copolymer emulsion thickeners o ka waikawa acrylic a me ka waikawa methacrylic) mānoanoa.
Hiki ke hoʻohana ʻia ka Hydroxyethyl cellulose no
1. Ma keʻano he dispersant a iʻole ke kāpili pale
ʻO ka maʻamau, hoʻohana ʻia ʻo HEC me kahi viscosity o 10-30mPaS. ʻO ka HEC hiki ke hoʻohana ʻia a hiki i ka 300mPa·S e ʻoi aku ka maikaʻi o ka hoʻopuehu ʻana inā hoʻohana ʻia ia me ka anionic a i ʻole cationic surfactants. ʻO ka helu kuhikuhi maʻamau he 0.05% o ka nui monomer.
2. E like me ka mānoanoa
E hoʻohana i ka 15000mPa. ʻO ka helu kuhikuhi o ka HEC kiʻekiʻe-viscosity ma luna o s he 0.5-1% o ka nui o ka nui o ka pena latex, a hiki i ka waiwai PVC ke hiki i kahi 60%. E hoʻohana i ka HEC ma kahi o 20Pa, s i ka pena latex, a ʻo ka hana o ka pena latex ka mea maikaʻi loa. ʻO ke kumukūʻai o ka hoʻohana wale ʻana iā HEC ma luna o 30O00Pa.s he haʻahaʻa. Eia naʻe, ʻaʻole maikaʻi nā ʻano hoʻohālikelike o ka pena latex. Mai ka hiʻohiʻona o nā koi o ka maikaʻi a me ka hōʻemi ʻana i ke kumukūʻai, ʻoi aku ka maikaʻi o ka hoʻohana pū ʻana me HEC viscosity kiʻekiʻe.
3. ʻO ke ʻano hui ʻana i ka pena latex
Hiki ke hoʻohui ʻia ka HEC i mālama ʻia i ka ʻili i ka pauka maloʻo a i ʻole ke ʻano paʻi. Hoʻohui pololei ʻia ka pauka maloʻo i ka wili puaʻa. ʻO ka pH ma ka wahi hānai he 7 a i ʻole. Hiki ke hoʻohui ʻia nā ʻāpana alkaline e like me Yanbian dispersant ma hope o ka pulu ʻana o HEC a hoʻopuehu piha. Pono e hui ʻia nā slurries i hana ʻia me HEC i loko o ka slurry ma mua o ka loaʻa ʻana o ka manawa kūpono o ka HEC e hydrate a ʻae e mānoanoa i kahi kūlana hiki ʻole ke hoʻohana. Hiki nō hoʻi ke hoʻomākaukau i ka pulp HEC me ka ethylene glycol coalescing agents.
4. Anti-moli o ka latex pena
E biodegrade ka HEC hiki ke hoʻoheheʻe ʻia i ka wai ke hoʻopili ʻia me nā poʻi i loaʻa nā hopena kūikawā i ka cellulose a me kāna mau mea. ʻAʻole lawa ka hoʻohui ʻana i nā preservatives i ka pena wale nō, pono nā ʻāpana āpau i ka enzyme-noa. Pono e hoʻomaʻemaʻe ʻia ka kaʻa hana o ka pena latex, a e hoʻomaʻemaʻe mau ʻia nā mea hana a pau me ka mahu 0.5% formalin a i ʻole O.1% mercury solution.
Ka manawa hoʻouna: Dec-26-2022