ʻO Hydroxypropyl Methyl Cellulose/Hypromellose/HPMC e paʻa ana i ka wai no ke kūkulu ʻana

ʻO ka Hydroxypropyl methylcellulose (HPMC) he mau cellulose ethers i loaʻa nā hui hydroxyl ma ke kaulahao cellulose i pani ʻia no kahi hui methoxy a i ʻole hydroxypropyl.It hana ʻia e ka etherification kūikawā o ka cellulose pulupulu maʻemaʻe loa ma lalo o nā kūlana alkaline. I nā makahiki i hala iho nei, ʻo HPMC, ma ke ʻano he hui hana, ke hana nui neisi ka paʻa ʻana o ka wai a me ka mānoanoa i ka ʻoihana kūkulu hale a hoʻohana nui ʻia inā mortars drymix, e like me ke tile adhesive, grouts, plastering, wall putty, self-leveling, insulation mortars a pēlā aku.

ʻO ka maʻamau, no ka pauka putty, ka mānoanoa oHPMCua lawa ma kahi o 70,000 a 80,000. ʻO ke kumu nui ma kāna hana paʻa wai, ʻoiai he liʻiliʻi ka hopena mānoanoa. No ka mortar, nā koi noHPMCʻoi aku ke kiʻekiʻe, a pono ka mānoanoa ma kahi o 150,000, hiki ke hōʻoia i ka hana maikaʻi ʻana i ka sima sima. ʻOiaʻiʻo, i ka pauka putty, inā maikaʻi ka hana paʻa wai o HPMC, ʻoiai inā haʻahaʻa ka mānoanoa (70,000 a 80,000), ua ʻae ʻia. Eia nō naʻe, i ka sima sima, ʻoi aku ka maikaʻi o ke koho ʻana i ka HPMC me ka mānoanoa nui aʻe (ʻoi aku ma mua o 100,000), no ka mea, ʻoi aku ka koʻikoʻi o kona hopena paʻa wai i kēia kūlana.

ʻO ka pilikia o ka wehe ʻana i ka pauka putty e hilinaʻi nui ʻia ana ma ke ʻano o ka calcium hydroxide a ʻaʻohe ona pili iki me ka HPMC. Inā haʻahaʻa ka nui o ka calcium o ka calcium hydroxide a i ʻole kūpono ʻole ka lakio o CaO a me Ca(OH)2, hiki ke hoʻoulu i ka pauka putty e hāʻule. No ka hopena o ka HPMC, ʻike nui ʻia ia ma kāna hana paʻa wai. Inā haʻahaʻa ka hana paʻa wai o HPMC, hiki nō hoʻi ke loaʻa kahi hopena i ka depowdering o ka pauka putty.

He haʻahaʻa iki nā koi no ka hoʻohana ʻana i ka pauka putty. Ua lawa ka mānoanoa o 100,000. ʻO ke kī, ʻo ia ka loaʻa ʻana o nā waiwai paʻa wai maikaʻi. No ka mortar, he kiʻekiʻe iki nā koi a koi ʻia ka mānoanoa kiʻekiʻe, a ʻoi aku ka maikaʻi o ka hopena o ka huahana 150,000.