I-HPMC kwiplasta yegypsum

IHydroxypropyl Methylcellulose (HPMC)yi-non-ionic cellulose ether, esetyenziswa kakhulu kwizixhobo zokwakha, ingakumbi kwi-dry-mixed mortar, i-tile adhesive, i-putty powder kunye neemveliso ze-gypsum.

1. Isishwankathelo seplasta yegypsum

I-gypsum plaster yinto yokulinganisa udonga ene-gypsum yokwakha njengesixhobo esiphambili sokwakha, esineenzuzo zokwakha lula, ukomisa ngokukhawuleza kunye nobuhlobo nokusingqongileyo. Ngokwemilinganiselo yezongezo ezahlukeneyo, iimveliso ezineempawu ezahlukeneyo ezifana nokuplasta ngesandla, i-gypsum yokutshiza kunye ne-self-leveling gypsum zinokulungiswa. Nangona i-gypsum plaster ngokwendalo inokunamathela okuthile kunye nesantya sokuqina, iseneengxaki ezifana nokugcinwa kwamanzi kakubi, ukuqhekeka okulula kunye nokwakhiwa okubi ngexesha lenkqubo yokwakha, ngoko ke kuyimfuneko ukongeza izinto ezifanelekileyo ezilungisiweyo ukuphucula ukusebenza kwayo okubanzi.

2. Indlela yokusebenza kwe-HPMC

Njengesixhobo sepolymer esinyibilikayo emanzini esisebenza kakuhle kakhulu, i-HPMC iphucula kakhulu ukusebenza kweplasta yegypsum ngezi zinto zilandelayo:

2.1. Ukugcinwa kwamanzi okuphuculweyo:

I-HPMC inomthamo olungileyo wokugcina amanzi kwaye inokunciphisa kakhulu izinga lokulahleka kwamanzi kwi-gypsum ngexesha lokwakha. Olu phawu lubalulekile ekwandiseni ixesha lokuqala lokuseta i-gypsum kunye nokuphucula ixesha lokusebenza kokwakha, ingakumbi kubushushu obuphezulu okanye kumaleko esiseko afunxa kakhulu, anokuthintela ngempumelelo ukuqhekeka kunye nokuncipha kokunamathela.

2.2. Ulwakhiwo oluphuculweyo kunye nokusebenza kakuhle:

I-HPMC inokunyusa ukuhambelana kunye nokutyeba kwe-slurry, yenze i-gypsum plaster ibe lula ngexesha lokuplasta nokulinganisa udonga, inciphise ukumelana nezixhobo kwaye iphucule ukusebenza kakuhle kolwakhiwo. Kwi-gypsum etshizwa ngomatshini, i-HPMC ngumlawuli we-rheology oyimfuneko.

2.3. Ukuphucula ukusebenza kokulwa nokuwa:

Kwisakhiwo esinomgangatho otyebileyo okanye udonga oluthe nkqo, ukongeza i-HPMC kunokuphucula kakhulu ukusebenza kweplasta okuchasene nokugoba, okuvumela ukuba igcine uzinzo oluhle kwaye kungabi lula ukutyibilika ezantsi.

2.4. Uzinzo lwebhamuza kunye nokusasazeka okufanayo:

Amaqamza amancinci akhiwa lula ngexesha lenkqubo yokuxuba. I-HPMC ingazinzisa ezi qamza, nto leyo eluncedo ekunciphiseni uxinano lweplasta nokuphucula ukusebenza kwe-thermal insulation, kodwa ayiyi kuchaphazela iimpawu zayo zoomatshini.

2.5. Ukuqinisa ukubopha:

I-HPMC inokwenza isakhiwo sefilimu esiguquguqukayo phakathi kwe-gypsum kunye ne-substrate, ngaloo ndlela iphucula ukusebenza kokubopha kunye nokunciphisa iingxaki zomgangatho ezifana nokuqhekeka nokuxobuka.

3. Iingcebiso zokusetyenziswa kwe-HPMC kunye nedosi

I-HPMC idla ngokufakwa kumxube owomileyo we-gypsum ngendlela yomgubo kwaye ixutywe ngokupheleleyo nezinye izinto (ezifana ne-aggregate elula, isanti ye-quartz, i-retarder, njl.njl.) ngenkqubo yokuxuba eyomileyo. Umthamo wayo uhlala ulawulwa kwi-0.1% ~ 0.3% (ngokusekelwe kwizinto ezomileyo), kwaye umlinganiselo othile kufuneka ulungiswe kwaye ulungiswe ngokwezinto ezifana nefomula yemveliso, indlela yokwakha kunye neemeko zemozulu.

Kwi-gypsum yokutshiza, ukuze kuphuculwe ukuthamba kunye nokufunxwa kolwakhiwo, i-HPMC enezinga eliphezulu lokutshintsha kunye ne-viscosity efanelekileyo (efana ne-50,000100,000 mPa.s) inokukhethwa, ngelixa kwi-gypsum eplastwe ngesandla, iintlobo ze-viscosity ephakathi (20,00060,000 mPa.s) zinokukhethwa ukuze kuthathelwe ingqalelo imvakalelo yolwakhiwo kunye neempawu zokungathobeki.

4. Amanyathelo okhuseleko kunye nemingeni

Nangona i-HPMC izise iingenelo ezininzi kwi-gypsum plaster, la manqaku alandelayo afanele aqatshelwe xa kusenziwa uyilo nokusetyenziswa kwefomyula:

Ukusasazwa okufanayo: I-HPMC kufuneka isasazwe ngokupheleleyo ukuze kuthintelwe ukuhlangana, kwaye isiphumo sokusasazwa kwayo sinokuphucuka ngokuxuba okomileyo okanye ngaphambi kokuba inyibilike.

Ukuhambelana nezinye izongezo: I-HPMC kufuneka isebenzisane ne-retarders, i-water reducers, ii-expansion agents, njl.njl. ukuze kuthintelwe iimpembelelo ezimbi.

Ukukhetha i-viscosity efanelekileyo: i-viscosity ephezulu ayiphezulu koko ingcono. I-viscosity ephezulu kakhulu iya kubangela ubunzima bokuxuba, ukunyibilika kakubi, kwaye ichaphazele nokusebenza kokumpompa.

Ngophuhliso lwezixhobo zokwakha eziluhlaza kunye nokwandiswa kolwakhiwo olusebenzisa oomatshini, iimfuno zokusebenza kweplasta yegypsum nazo ziyanda. I-HPMC iya kuqhubeka nokudlala indima ephambili ekulawuleni ukusebenza kolwakhiwo kunye nokuphucula uzinzo lomgangatho. Kwangaxeshanye, iimveliso ze-cellulose ether eziguquliweyo ziya kusetyenziswa kunyeI-HPMCukuhlangabezana neemfuno ezithile zokusebenza, ezifana nenkqubo yokudibanisa i-HPMC/HEMC kunye nemisebenzi emininziumgubo welatex ophinda unyibilikeisisombululo esidibeneyo, ukunceda iimveliso zegypsum ziphuhlise ngendlela esebenza kakhulu kwaye zisebenze ngeendlela ezininzi.