I-HPMC esetshenziswa ku-Wall Putty/Skim Coat

I-HPMC, noma i-Hydroxypropyl Methyl Cellulose, isebenza ngezinjongo ezahlukahlukene ngokusekelwe kuzinga layo. E-China, isetshenziswa kakhulu ekwakheni. Ngokukhethekile, ekukhiqizweni kwe-wall putty noma i-skim coat, inani elikhulu le-skim coat powder, okuhlanganisa i-HPMC nezinye izinto eziwumpuphu, lihlanganiswa kahle bese lincibilikiswa ngokufaka amanzi. Le ndlela ivimbela ukuhlangana ngenxa yokuncibilika ngokushesha kwezinhlayiya ze-HPMC emanzini.

Izinga lokushisa lejeli le-HPMC lincike kokuqukethwe kwayo kwe-methoxy; okuqukethwe okuphansi kwe-methoxy kuholela ekushiseni okuphezulu kwejeli. I-HPMC encibilikayo emanzini abandayo, ephathwa nge-glyoxal, isakazeka ngokushesha emanzini abandayo, ibonise ukwanda kwe-viscosity kodwa hhayi ukuncibilika okuphelele. Ngakolunye uhlangothi, i-HPMC encibilikayo, engaphathwanga nge-glyoxal, isakazeka ngokushesha kodwa ine-viscosity ephansi ngamanani amancane. I-HPMC ingahlukaniswa ngezinhlobo ezisheshayo nezincibilikayo ekushiseni. Imikhiqizo esheshayo isakazeka ngokushesha emanzini abandayo futhi kancane kancane yandisa i-viscosity, yakha i-colloid ecacile enamathelayo. Izinhlobo ezincibilikayo ekushiseni, ezifanele i-skim coat kanye ne-mortar, zibonisa ukuhlangana kwe-glue ewuketshezi kanye ne-coating.

Ukukhiqizwa kwe-HPMC kuhilela indlela yokunyibilikisa esebenzisa i-toluene noma i-isopropyl alcohol. Ukusetshenziswa kwempuphu ye-skim coat kudinga i-viscosity ephansi, cishe i-10,000, kugxilwe ekuvikelweni kwamanzi. Ukufakwa kwe-mortar kudinga i-viscosity ephezulu, cishe i-15,000, kuyilapho ukusetshenziswa kwe-glue kudinga imikhiqizo esheshayo ene-viscosity ephezulu. Inani langempela le-HPMC elisetshenziswayo liyahlukahluka kuye ngesimo sezulu, izinga lokushisa lendawo, ikhwalithi ye-calcium empunga yendawo, ifomula ye-skim coat, kanye nezidingo zekhwalithi yamakhasimende.

I-HPMC, ene-viscosity engu-100,000 ku-skim coat powder, idlala indima ebalulekile ekugcinweni nasekuqineni kwamanzi. Kodwa-ke, ekusetshenzisweni okungokoqobo, i-viscosity engu-70,000 kuya ku-80,000 iyamukeleka. Umsebenzi oyinhloko we-HPMC ku-skim coat uhlanganisa ukuqina, ukugcinwa kwamanzi, kanye nokusiza ekwakheni. Ayihlanganyeli ekuphenduleni kwamakhemikhali kodwa inegalelo ekuvimbeleni ukwakheka kwama-bubble ngokuqinisekisa ukoma okufanele.

Ubudlelwano phakathi kwempuphu ye-wall putty/skim coat kanye nekhwalithi ye-calcium yomlotha oyinhloko bubalulekile, kuyilapho ithonya le-HPMC lilinganiselwe. Indima ye-HPMC ekugcinweni kwamanzi ingathinta ukuwohloka kwempuphu, futhi ukusebenzisana kwayo namanzi ngesikhathi sokusetshenziswa kwe-skim coat kuhilela ukusabela kwamakhemikhali, okwakha into entsha (i-calcium carbonate). Kodwa-ke, i-HPMC ngokwayo ayihlanganyeli kulezi zindlela zokusabela.

Amafomula ahlukahlukene empuphu ye-wall putty ahlangabezana nezidingo ezahlukene, njenge-putty evamile yangaphakathi, i-putty yangaphakathi yokuqina okuphezulu, i-putty yangaphakathi yokuqina okuphezulu, i-putty yangaphandle yokuqina okuphezulu, i-putty yangaphakathi yokuqina engagezwa futhi engangenwa yisikhunta, kanye ne-putty yangaphandle yokuqina engagezwa enwebekayo, phakathi kwezinye. Ifomula ngayinye ichaza iphesenti le-Redispersible Polymer Powder (RDP), i-double fly powder, i-gray calcium powder, i-white cement, kanye ne-HPMC, eyenzelwe ukusetshenziswa okuthile njengodaka, i-glue, noma i-coating.