Ọrụ HPMC na nrapado tile dabere na ciment

(1) Nchịkọta nke HPMC

Hydroxypropyl Methyl Cellulose (HPMC) bụ ether cellulose na-abụghị ionic nke a na-ejikarị eme ihe ụlọ. HPMC nwere ezigbo mmiri solubility, njigide mmiri, ihe na-emepụta ihe nkiri na nkwụsi ike, a na-ejikwa ya n'ọtụtụ ebe na ihe owuwu ụlọ dị ka adhesives tile, putty powder, gypsum board and dry mortar. N'ime ihe ntanye tile nke simenti dabere, HPMC na-arụ ọrụ dị mkpa, yana ọrụ ya na-egosipụtakarị n'ịkwalite arụmọrụ ihe owuwu, na-abawanye ike njikọta, ịgbatị oge mepere emepe, yana ịba ụba akụrụngwa mgbochi.

(2) Ọrụ HPMC na nrapado tile dabere na ciment

1. Ịkwalite ịrụ ọrụ ihe owuwu
HPMC nwere ike imeziwanye arụmọrụ owuwu nke nrapado tile dabere na ciment, nke egosipụtara nke ọma n'akụkụ ndị a:

Ịbawanye rheology: HPMC na-abawanye viscosity nke nrapado site na mmetụta ya na-eme ka ọ dịkwuo mfe, na-eme ka ọ dị mfe ịgbasa na gbanwee, si otú ahụ na-eme ka ihe owuwu dị mma. Rheology kwesịrị ekwesị na-eme ka a hụ na nrapado nwere ike ịmepụta otu akwa njikọta na mgbidi ma ọ bụ n'ala, nke dị mkpa karịsịa maka ịtọ akwa akwa tile.

Meziwanye njide mmiri: HPMC nwere ikike ijide mmiri dị mma ma nwee ike igbachi mmiri na nrapado iji gbochie mmiri ịpụ ngwa ngwa. Nke a abụghị naanị na-enyere ciment aka ka ọ na-eme ka mmiri dị ọcha, kamakwa ọ na-agbatị oge oghere nke nrapado, na-enye ndị na-arụ ọrụ ụlọ ohere ohere iji dozie ma dozie ọnọdụ nke taịl nile.

Meziwanye ihe mgbochi: Mgbe ị na-edobe taịlị, karịsịa nnukwu taịl nile na mgbidi kwụ ọtọ, nsogbu nke mwepu tile na-enwekarị nsogbu ndị ọrụ na-ewu ụlọ. HPMC na-abawanye viscosity nke nrapado, na-enye ohere ka taịlị ahụ nweta ngwa ngwa njikọ mbụ mgbe echichi gasịrị, si otú a na-egbochi ntọhapụ nke ọma.

2. Meziwanye ike nkekọ
HPMC nwere ike imeziwanye ike nkekọ nke nrapado tile dabere na ciment n'ihi na ọ nwere ike ịrụ ọrụ n'akụkụ ndị a:

Kwalite hydration ciment: Ihe njide mmiri nke HPMC nwere ike idowe mmiri dị na nrapado ma kwalite hydration zuru oke nke ciment. Nkume nkume ciment nke a na-emepụta site na hydration zuru oke nke ciment dị oke, si otú a na-eme ka ike nke njikọ nke nrapado dịkwuo elu.

Mmetụta interface emelitere: HPMC nwere ike ịmepụta ihe nkiri polymer dị mkpa n'etiti nrapado na taịlị. Ihe nkiri a nwere ezigbo adhesion na mgbanwe, nke nwere ike ime ka ike dị n'etiti etiti dị n'etiti nrapado na tile base elu ma melite ike njikọ zuru oke.

3. Ogologo oge na-emeghe
Oge a na-emeghe na-ezo aka na oge site na ntinye nke nrapado na ntinye nke tile. Njide mmiri na njikwa rheological nke HPMC nwere ike ịgbatị oge oghere nke adhesives tile dabeere ciment, nke a na-egosipụta na akụkụ ndị a:

Mmiri mmiri na-egbu oge: Ihe nkiri polymer nke HPMC guzobere nwere ike ibelata evaporation nke mmiri site na nrapado, nke mere na nrapado nwere ike ịnọgide na-arụ ọrụ ruo ogologo oge.

Debe mmiri: N'ihi hygroscopicity nke HPMC, nrapado nwere ike ịdịgide mmiri ruo ogologo oge, si otú ahụ gbasaa windo ọrụ ma na-abawanye mmezi na ịtọ oge ndị ọrụ ụlọ.

4. Mmụba arụmọrụ mgbochi-slip
Arụmọrụ mgbochi-slip na-ezo aka na nguzogide taịlị na mbugharị n'ihi ịdị arọ nke aka ha ma ọ bụ ike mpụga mgbe edobere ha. Mmetụta mkpụkọ na gelling nke HPMC nwere ike welie ihe mgbochi mgbochi nke nrapado tile dabere na ciment n'akụkụ ndị a:

Na-emeziwanye nrapado mbụ: HPMC na-eme ka adhesion mbụ nke nrapado na-eme ka ọ dịkwuo mma, na-enye ohere ka taịlị nweta ọnọdụ kwụsiri ike ngwa ngwa mgbe ịtọsịrị ma belata mbupụ.

Ịmepụta ihe ngbanwe: Usoro netwọk nke HPMC guzobere na nrapado nwere ike inye ụfọdụ ike mgbake, nke na-arụ ọrụ dị mkpa n'iguzogide nkwụsị tile.

(3) Ọnụ ego HPMC ejiri mee ihe na nrapado taịlị dabere na ciment

Ọnụ ego nke HPMC agbakwunyere na-ekpebikarị dabere na ngwa ngwa dị iche iche, n'ozuzu n'etiti 0.1% na 0.5%. N'ime ngwa n'ezie, ọ dị mkpa iji dozie ego ahụ dịka usoro a kapịrị ọnụ nke nrapado, ọnọdụ ihe owuwu, na nkọwa tile iji nweta mmetụta kacha mma. Ịtinye obere HPMC ga-ebute njikọ na-adịghị mma, ebe ịgbakwụnye nke ukwuu nwere ike ịbawanye ọnụ ahịa ma na-emetụta arụmọrụ ụlọ.

(4) Nhọrọ na ndakọrịta nke HPMC

Ịhọrọ nkọwapụta HPMC kwesịrị ekwesị na nrapado tile dabere na ciment dị oke mkpa maka ịrụ ọrụ ngwaahịa. Oke dị ka HPMC viscosity, ogo nnọchi anya na nha nha ga-emetụta nsonaazụ ikpeazụ ya. N'ozuzu, elu viscosity nke HPMC, mma ya mmiri njide na ndim mmetụta, ma mgbasa oge ga-abawanye dịtụ. Ya mere, ọ dị mkpa ịhọrọ nkọwa kwesịrị ekwesị dịka mkpa dị n'ezie.

HPMC kwesịrị ka ejikọta ya na ihe mgbakwunye ndị ọzọ iji nweta arụmọrụ kacha mma. Dịka ọmụmaatụ, nchikota na ihe mgbakwunye dị ka ethylene glycol, propylene glycol na cellulose ethers ndị ọzọ nwere ike ịkwalite ịrụ ọrụ ụlọ na ịdịte aka nke nrapado.

(5) Usoro mmepe nke HPMC na nrapado tile dabere na ciment

Site na ọganihu na-aga n'ihu nke nkà na ụzụ ihe owuwu ụlọ, ihe ndị a chọrọ maka ịrụ ọrụ nke nchara tile dabeere na ciment na-arịwanye elu. Dị ka otu n'ime isi ihe mgbakwunye, usoro mmepe nke HPMC na-egosipụtakarị n'akụkụ ndị a:

Nnyocha na mmepe nke HPMC na gburugburu ebe obibi: Site na nkwalite nke mmata gburugburu ebe obibi, nyocha na mmepe nke ogige organic na-adịghị ala ala (VOC) na HPMC na-emekọrịta ihe na gburugburu ebe obibi aghọwo ihe na-emekarị.

Mmepe nke HPMC na-arụ ọrụ: Iji mezuo ihe owuwu dị iche iche, ngwaahịa HPMC nwere ọrụ dị iche iche (dịka mgbochi mildew, antibacterial, njigide agba, wdg) na-emepe emepe iji melite arụmọrụ zuru oke nke nrapado tile.

Ngwa nke HPMC nwere ọgụgụ isi: HPMC nwere ọgụgụ isi nwere ike ịhazigharị arụmọrụ ya ozugbo dabere na ọnọdụ gburugburu ebe obibi (dịka okpomọkụ, iru mmiri, wdg), nke mere na nrapado tile dabeere na ciment nwere ike ịnọgide na-arụ ọrụ dị mma n'okpuru ọnọdụ ụlọ dị iche iche.

Ngwa nke HPMC na nchikota tile nke simenti na-eme ka arụ ọrụ nke nrapado dịkwuo mma, gụnyere imeziwanye arụmọrụ ihe owuwu, na-abawanye ike njikọ, ịgbatị oge na-emeghe na ịba ụba nke ihe mgbochi. Njide mmiri ya, ịgbatị na mmetụta interface dị mma na-eme ka adhesives tile dabere na ciment iji nweta nsonaazụ kacha mma n'ihe owuwu n'ezie. Site na ọganihu teknụzụ na-aga n'ihu, mpaghara ngwa na ọrụ nke HPMC na-agbasawanye mgbe niile, na-enye atụmanya sara mbara maka mmepe nke nrapado tile dabeere na ciment.