HPMC i hoʻohana ʻia ma ka Wall Putty/Skim Coat

Hana ʻo HPMC, a i ʻole Hydroxypropyl Methyl Cellulose, i nā kumu like ʻole ma muli o kona ʻano. Ma Kina, hoʻohana nui ʻia ia i ke kūkulu ʻana. ʻO ke kikoʻī, i ka hana ʻana o ka putty paia a i ʻole ka skim coat, ua hui maikaʻi ʻia ka nui o ka pauka skim coat, me HPMC a me nā mea pauka ʻē aʻe, a laila hoʻoheheʻe ʻia ma ka hoʻohui ʻana i ka wai. Pale kēia ʻano hana i ka hōʻuluʻulu ʻana ma muli o ka hoʻoheheʻe koke ʻana o nā ʻāpana HPMC i loko o ka wai.

ʻO ka mahana o ka gel o HPMC e pili ana i kona ʻike methoxy; ʻo ka haʻahaʻa o ka ʻike methoxy e alakaʻi i kahi mahana gel kiʻekiʻe. ʻO ka HPMC wai anuanu, i mālama ʻia me ka glyoxal, e hoʻopuehu koke i ka wai anuanu, e hōʻike ana i ka viscosity i hoʻonui ʻia akā ʻaʻole i hoʻoheheʻe piha ʻia. Ma ka ʻaoʻao ʻē aʻe, ʻo ka HPMC thermosoluble, i mālama ʻole ʻia me ka glyoxal, e hoʻopuehu wikiwiki akā he viscosity lohi me nā liʻiliʻi liʻiliʻi. Hiki ke hoʻokaʻawale ʻia ka HPMC i nā ʻano koke a me nā ʻano wela. Hoʻopuehu koke nā huahana koke i ka wai anuanu a hoʻonui mālie i ka viscosity, e hana ana i kahi colloid viscous maopopo. ʻO nā ʻano wela-soluble, kūpono no ka ʻaʻahu skim a me ka mortar, e hōʻike ana i ka agglomeration i loko o ka glue wai a me ka uhi.

ʻO ka hana ʻana o HPMC e pili ana i kahi ʻano hana hoʻoheheʻe e hoʻohana ana i ka toluene a i ʻole ka waiʻona isopropyl. ʻO ka hoʻopili ʻana o ka pauka ʻaʻahu skim e pono ai ka viscosity haʻahaʻa, ma kahi o 10,000, me ka nānā ʻana i ka pale wai. Pono nā noi mortar i ka viscosity kiʻekiʻe, ma kahi o 15,000, ʻoiai ʻo nā noi glue e pono ai nā huahana koke me ka viscosity kiʻekiʻe. ʻOkoʻa ka nui maoli o ka HPMC i hoʻohana ʻia ma muli o ke aniau, ka mahana o ke kaiapuni, ka maikaʻi o ka calcium hina kūloko, ke ʻano o ka ʻaʻahu skim, a me nā koi maikaʻi o ka mea kūʻai aku.

ʻO HPMC, me ka mānoanoa o 100,000 i loko o ka pauka ʻaʻahu skim, he kuleana koʻikoʻi ia i ka paʻa ʻana o ka wai a me ka mānoanoa. Eia nō naʻe, i nā hana kūpono, ʻae ʻia ka mānoanoa o 70,000 a 80,000. ʻO ka hana nui o HPMC i loko o ka ʻaʻahu skim e pili ana i ka mānoanoa, ka paʻa ʻana o ka wai, a me ke kōkua ʻana i ke kūkulu ʻana. ʻAʻole ia e komo i nā hopena kemika akā kōkua i ka pale ʻana i ka hoʻokumu ʻana o ka pehu ma ka hōʻoia ʻana i ka maloʻo pono.

He mea koʻikoʻi ka pilina ma waena o ka pauka putty/skim coat o ka paia a me ka maikaʻi o ka calcium lehu nui, ʻoiai ua kaupalena ʻia ka mana o HPMC. Hiki i ke kuleana o HPMC i ka paʻa ʻana o ka wai ke hoʻopilikia i ka pauka e hāʻule ana, a ʻo kāna pilina me ka wai i ka wā o ka hoʻopili ʻana i ka skim coat e pili ana i kahi hopena kemika, e hana ana i kahi mea hou (calcium carbonate). Eia naʻe, ʻaʻole komo ʻo HPMC iho i kēia mau hopena.

Hoʻokō nā ʻano hana pauka putty pā like ʻole i nā pono like ʻole, e like me ka putty pā o loko maʻamau, ka putty pā o loko paʻakikī kiʻekiʻe, ka putty pā o loko kūpaʻa wai, ka putty pā o waho paʻakikī kiʻekiʻe, ka putty pā o loko hiki ke holoi ʻia a pale i ka mildew, a me ka putty anti-crack pā o waho elastic hiki ke holoi ʻia, a me nā mea ʻē aʻe. Hoʻākāka kēlā me kēia ʻano hana i ka pakeneka o ka Redispersible Polymer Powder (RDP), ka pauka lele pālua, ka pauka calcium hina, ka sima keʻokeʻo, a me ka HPMC, i hana ʻia no nā noi kikoʻī e like me ka mortar, glue, a i ʻole ka uhi ʻana.