I-HPMC esetyenziswa kwi-Wall Putty/Skim Coat

I-HPMC, okanye iHydroxypropyl Methyl Cellulose, isebenza ngeenjongo ezahlukeneyo ngokusekelwe kudidi lwayo. E-China, isetyenziswa kakhulu ekwakheni. Ngokukodwa, ekuveliseni i-wall putty okanye i-skim coat, isixa esikhulu se-skim coat powder, kuquka i-HPMC kunye nezinye izinto ezi-powdery, sixutywa kakuhle size sinyibilike ngokongeza amanzi. Le ndlela ithintela ukuhlangana ngenxa yokunyibilika kwangoko kwamasuntswana e-HPMC emanzini.

Ubushushu bejeli ye-HPMC buxhomekeke kumxholo wayo we-methoxy; umxholo ophantsi we-methoxy ukhokelela kubushushu obuphezulu bejeli. I-HPMC enyibilikayo ngokukhawuleza emanzini abandayo, enyangwa nge-glyoxal, isasazeka ngokukhawuleza emanzini abandayo, ibonakalisa ukwanda kwe-viscosity kodwa inganyibiliki ngokupheleleyo. Kwelinye icala, i-HPMC enyibilikayo kwi-thermosoluble, enganyangwanga nge-glyoxal, isasazeka ngokukhawuleza kodwa ine-viscosity ecothayo enemilinganiselo emincinci. I-HPMC inokwahlulwahlulwa ngokweentlobo ezinyibilikayo ngokukhawuleza kunye neentlobo ezinyibilikayo kubushushu. Iimveliso ezikhawulezayo zisasazeka ngokukhawuleza emanzini abandayo kwaye kancinci kancinci zandisa i-viscosity, zenze i-colloid ebonakalayo ethambileyo. Iintlobo ezinyibilikayo kubushushu, ezifanelekileyo kwi-skim coat kunye ne-mortar, zibonisa i-agglomeration kwi-glue yolwelo kunye ne-coating.

Ukuveliswa kwe-HPMC kubandakanya indlela yokunyibilikisa kusetyenziswa i-toluene okanye i-isopropyl alcohol. Ukusetyenziswa kwe-skim coat powder kufuna i-viscosity ephantsi, malunga ne-10,000, kugxilwe ekukhuseleni amanzi. Ukusetyenziswa kwe-mortar kufuna i-viscosity ephezulu, malunga ne-15,000, ngelixa ukusetyenziswa kweglue kufuna iimveliso ezikhawulezileyo ezine-viscosity ephezulu. Ubungakanani bokwenyani be-HPMC obusetyenzisiweyo buyahluka ngokusekwe kwimozulu, ubushushu bokusingqongileyo, umgangatho we-gray calcium yendawo, ifomula ye-skim coat, kunye neemfuno zomgangatho wabathengi.

I-HPMC, ene-viscosity ye-100,000 kwi-skim coat powder, idlala indima ebalulekileyo ekugcineni amanzi kunye nokuqina. Nangona kunjalo, kwiindlela ezisebenzayo, i-viscosity ye-70,000 ukuya kwi-80,000 iyamkeleka. Umsebenzi ophambili we-HPMC kwi-skim coat uquka ukuqina, ukugcina amanzi, kunye nokuncedisa ekwakheni. Ayithathi nxaxheba kwiimpendulo zeekhemikhali kodwa inegalelo ekuthinteleni ukwakheka kwamaqamza ngokuqinisekisa ukoma ngokufanelekileyo.

Ubudlelwane phakathi komgubo we-wall putty/skim coat kunye nomgangatho we-calcium yomlotha ophambili bubalulekile, ngelixa impembelelo ye-HPMC ilinganiselwe. Indima ye-HPMC ekugcinweni kwamanzi inokuchaphazela ukuwohloka komgubo, kwaye ukusebenzisana kwayo namanzi ngexesha lokusetyenziswa kwe-skim coat kubandakanya ukusabela kweekhemikhali, okwenza into entsha (i-calcium carbonate). Nangona kunjalo, i-HPMC ngokwayo ayithathi nxaxheba kwezi mpendulo.

Iifomula ezahlukeneyo zepowder ye-wall putty zihlangabezana neemfuno ezahlukeneyo, njenge-putty eqhelekileyo yangaphakathi, i-putty yangaphakathi yobunzima obuphezulu, i-putty yangaphakathi yodonga engangeni manzi, i-putty yangaphandle yodonga yobunzima obuphezulu, i-putty yangaphakathi yodonga engahlanjwayo nengaguqukiyo, kunye ne-putty yangaphandle yodonga engaguqukiyo ethambileyo, phakathi kwezinye. Ifomula nganye ichaza ipesenti ye-Redispersible Polymer Powder (RDP), i-double fly powder, i-grey calcium powder, i-white cement, kunye ne-HPMC, eyenzelwe ukusetyenziswa okuthile njengodaka, iglu, okanye i-coating.