I-HPMC kuplasta ye-gypsum

I-Hydroxypropyl Methylcellulose (HPMC)iyi-ether ye-cellulose engeyona i-ionic, esetshenziswa kabanzi ezintweni zokwakha, ikakhulukazi ku-mortar exutshwe okomile, i-tile adhesive, i-putty powder kanye nemikhiqizo ye-gypsum.

1. Ukubuka konke kwe-gypsum plaster

I-gypsum plaster iyinto yokulinganisa udonga ene-gypsum yokwakha njengento eyinhloko yokufaka usimende, enezinzuzo zokwakha okulula, ukomisa ngokushesha kanye nobungane bemvelo. Ngokwesilinganiso sezithasiselo ezahlukene, imikhiqizo enezakhiwo ezahlukene njengokuplasta ngesandla, i-gypsum yokufafaza kanye ne-self-leveling gypsum ingalungiswa. Nakuba i-gypsum plaster ngokwemvelo inokunamathela okuthile kanye nesivinini sokuqina, isenezinkinga ezifana nokugcinwa kwamanzi okungekuhle, ukuqhekeka okulula kanye nokwakhiwa okungekuhle ngesikhathi senqubo yokwakha, ngakho-ke kuyadingeka ukwengeza izinto ezifanele eziguquliwe ukuze kuthuthukiswe ukusebenza kwayo okuphelele.

2. Indlela yokusebenza kwe-HPMC

Njengento ye-polymer encibilika emanzini esebenza kahle kakhulu, i-HPMC ithuthukisa kakhulu ukusebenza kwe-gypsum plaster ngalezi zici ezilandelayo:

2.1. Ukugcinwa kwamanzi okuthuthukisiwe:

I-HPMC inomthamo omuhle wokugcina amanzi futhi inganciphisa kakhulu izinga lokulahlekelwa amanzi kwe-gypsum ngesikhathi sokwakha. Lesi sici sibalulekile ekwandiseni isikhathi sokuqala sokusetha i-gypsum nokuthuthukisa isikhathi sokusebenza kokwakha, ikakhulukazi ezingqimbeni ezishisayo noma ezisekelweni ezimunca kakhulu, ezingagwema ngempumelelo ukuqhekeka nokuncipha kokunamathela.

2.2. Ukwakhiwa okuthuthukisiwe kanye nokusebenza kahle:

I-HPMC ingakhulisa ukuqina kanye nokuthamba kwe-slurry, yenze i-gypsum plaster ibe lula ngesikhathi sokuplasta nokulinganisa udonga, inciphise ukumelana namathuluzi futhi ithuthukise ukusebenza kahle kokwakha. Ku-gypsum efuthwe ngomshini, i-HPMC iwumlawuli we-rheology obalulekile.

2.3. Ukusebenza okuthuthukisiwe kokulwa nokuwa:

Ekwakhiweni kwezingqimba ezijiyile noma ekwakhiweni kodonga oluqondile, ukwengeza i-HPMC kungathuthukisa kakhulu ukusebenza kwe-plaster okuvimbela ukugoba, okuvumela ukuthi igcine ukuqina kwesimo esihle futhi kungabi lula ukushelela phansi.

2.4. Ukuqina kwebhamuza kanye nokusabalala okufanayo:

Amabhamuza amancane akheka kalula ngesikhathi senqubo yokuxuba. I-HPMC ingazinzisa la mabhamuza, okuwusizo ekunciphiseni ubuningi beplasta nokuthuthukisa ukusebenza kokuvikela ukushisa, kodwa ngeke kuthinte izakhiwo zayo zemishini.

2.5. Ukubopha okuthuthukisiwe:

I-HPMC ingakha isakhiwo sefilimu esiguquguqukayo phakathi kwe-gypsum kanye ne-substrate, ngaleyo ndlela ithuthukise ukusebenza kokubopha futhi inciphise izinkinga zekhwalithi njengokuqhekeka nokuqhekeka.

3. Izincomo zokusetshenziswa kwe-HPMC kanye nomthamo

I-HPMC ivame ukungezwa engxubeni eyomile ye-gypsum ngesimo sempuphu futhi ixutshwe ngokuphelele nezinye izingxenye (njenge-aggregate elula, isihlabathi se-quartz, i-retarder, njll.) ngenqubo yokuxuba eyomile. Umthamo wayo uvame ukulawulwa ku-0.1% ~ 0.3% (ngokusekelwe ezintweni ezomile), futhi isilinganiso esithile sidinga ukulungiswa futhi silungiswe ngokwezici ezifana nefomula yomkhiqizo, indlela yokwakha kanye nezimo zezulu.

Ekufutheni i-gypsum, ukuze kuthuthukiswe ukushelela nokuqina kokwakhiwa, i-HPMC enezinga eliphakeme lokufaka esikhundleni kanye ne-viscosity efanele (njenge-50,000100,000 mPa.s) ingakhethwa, kuyilapho ku-gypsum efakwe ngesandla, izinhlobo ze-viscosity eziphakathi (20,00060,000 mPa.s) zingakhethwa ukuze kucatshangelwe umuzwa wokwakhiwa kanye nezakhiwo zokulwa nokuwa.

4. Izinyathelo zokuqapha kanye nezinselele

Nakuba i-HPMC ilethe izinzuzo eziningi ku-gypsum plaster, amaphuzu alandelayo kufanele aqashelwe ngesikhathi sokuklama nokusebenzisa ifomula:

Ukusabalala okufanayo: I-HPMC idinga ukusabalala ngokuphelele ukuze kugwenywe ukuhlangana, futhi umphumela wokusabalala kwayo ungathuthukiswa ngokuxuba okomile noma ngaphambi kokuncibilika.

Ukuhambisana nezinye izithasiselo: I-HPMC kufanele isebenze ngokubambisana nezithiyo zokudambisa, izithiyo zokunciphisa amanzi, izinto zokwandisa, njll. ukuze kugwenywe ukusabela okubi.

Ukukhetha okunengqondo kwe-viscosity: i-viscosity ephezulu ayiphezulu kungcono. I-viscosity ephezulu kakhulu izobangela ubunzima bokuxuba, ukugeleza okungekuhle, futhi ithinte nokusebenza kahle kokupompa.

Ngokuthuthuka kwezinto zokwakha eziluhlaza kanye nokwanda kokwakhiwa komshini, izidingo zokusebenza ze-gypsum plaster nazo ziyanda. I-HPMC izoqhubeka nokudlala indima ebalulekile ekulawuleni ukusebenza kokwakhiwa nasekuthuthukiseni ukuzinza kwekhwalithi. Ngesikhathi esifanayo, imikhiqizo ye-cellulose ether eguquliwe kakhulu izosetshenziswa kanyekanyeI-HPMCukuhlangabezana nezidingo ezithile zokusebenza, njengohlelo lokuhlanganisa lwe-HPMC/HEMC kanye nemisebenzi eminingii-latex powder ephinde ihlakazekeisixazululo esihlanganisiwe, ukusiza imikhiqizo ye-gypsum ukuthi ithuthuke ngendlela esebenza kahle kakhulu kanye nokusebenza okuningi.