Umgaqo wokusebenza we-hydroxypropyl methylcellulose kumdaka

IHydroxypropyl methylcellulose (HPMC)yimbumba yepolymer enyibilikayo emanzini esetyenziswa kakhulu kwishishini lokwakha, ngakumbi kwi-samente-based mortar, i-gypsum-based mortar kunye ne-adhesive tile. Njengesongezo sodaka, i-HPMC inokuphucula ukusebenza kokwakhiwa, ukuphucula ukusebenza, ukunamathela, ukugcinwa kwamanzi kunye nokumelana nokuqhekeka kodaka, ngaloo ndlela iphucula umgangatho opheleleyo wodaka.

1. Iimpawu ezisisiseko ze-HPMC

I-HPMC ifumaneka ikakhulu ngokuguqulwa kwe-etherification ye-cellulose, kwaye inokunyibilika kakuhle kwamanzi, ukutyeba, ukwenza ifilimu, ukuthambisa kunye nokuzinza. Iimpawu zayo zomzimba ezibalulekileyo ziquka:

Ukunyibilika kwamanzi: Inokunyibilika emanzini abandayo okanye ashushu ukwenza isisombululo se-viscous esicacileyo okanye esiguquguqukayo.
Isiphumo sokuqina: Inokunyusa kakhulu i-viscosity yesisombululo kwaye ibonise isiphumo esihle sokuqina kwiindawo eziphantsi.
Ukugcinwa kwamanzi: I-HPMC inokufunxa amanzi kwaye idumbe, kwaye idlale indima ekugcinweni kwamanzi kudaka ukuthintela ukulahleka kwamanzi ngokukhawuleza.
Iimpawu zeRheological: Ine-thixotropy elungileyo, enceda ukuphucula ukusebenza kokwakhiwa kodaka.

2. Indima ephambili ye-HPMC kudaka

Indima ye-HPMC kudaka ibonakaliswa ikakhulu kule miba ilandelayo:

2.1 Ukuphucula ukugcinwa kwamanzi kwidaka

Ngethuba lenkqubo yokwakhiwa kwe-cement mortar, ukuba amanzi aphuphuma ngokukhawuleza okanye axutywe ngokugqithiseleyo kwisiseko, kuya kukhokelela kwimpendulo ye-samente eyaneleyo kwaye ichaphazele ukuphuhliswa kwamandla. I-HPMC yenza i-uniform mesh structure kudaka ngokusebenzisa i-hydrophilicity yayo kunye nokufunxwa kwamanzi kunye nokwandisa amandla, ukuvala ukufuma, ukunciphisa ilahleko yamanzi, ngaloo ndlela yandisa ixesha elivulekileyo lodaka kunye nokuphucula ukuguquguquka kokwakhiwa.

2.2 Isiphumo sokuqina, ukuphucula ukusebenza kodaka

I-HPMC inesiphumo esihle sokuqina, esinokunyusa i-viscosity yodaka, yenza udaka lube neplastiki engcono, kwaye ithintele udaka kwi-stratification, ukwahlukana kunye nokopha kwamanzi. Ngexesha elifanayo, ukuqina okufanelekileyo kunokuphucula ukwakhiwa kodaka, okwenza kube lula ukusebenzisa kunye nenqanaba ngexesha lenkqubo yokwakha, kunye nokuphucula ukusebenza kakuhle.

2.3 Ukuphucula ukudibanisa kunye nokuphucula ukunamathela kodaka

Kwizicelo ezifana ne-adhesive tile, i-masonry mortar kunye ne-plaster mortar, amandla okubopha udaka lubalulekile. I-HPMC yenza ifilimu ye-polymer efanayo phakathi kwesiseko kunye nokwaleka ngokusebenzisa isenzo sokwenza ifilimu, ephucula amandla okubopha udaka kwi-substrate, ngaloo ndlela inciphisa umngcipheko wokuqhekeka kodaka kunye nokuwa.

2.4 Ukuphucula ukusebenza kolwakhiwo kunye nokunciphisa i-sag

Ukwakhiwa komphezulu othe nkqo (njengotyabeka eludongeni okanye ulwakhiwo lokuncamathelisa iithayile), udaka luqheleke ukugrumba okanye lutyibilike ngenxa yobunzima balo. I-HPMC ikwandisa uxinzelelo lwesivuno kunye ne-anti-sag yodaka, ukwenzela ukuba udaka lukwazi ukubambelela kangcono kumphezulu wesiseko ngexesha lokwakhiwa okuthe nkqo, ngaloo ndlela kuphuculwe uzinzo lokwakha.

2.5 Yandisa ukuxhathisa kokuqhekeka kunye nokuphucula ukuqina

Umdaka ulungele ukuqhekeka ngenxa yokuncipha ngexesha lenkqubo yokuqina, echaphazela umgangatho weprojekthi. I-HPMC inokulungelelanisa uxinzelelo lwangaphakathi lodaka kunye nokunciphisa izinga lokunciphisa. Ngelo xesha, ngokuphucula ukuguquguquka kodaka, kunokumelana nokuqhekeka okungcono phantsi kokutshintsha kweqondo lokushisa okanye uxinzelelo lwangaphandle, ngaloo ndlela kuphuculwe ukuqina.

2.6 Ukuchaphazela ixesha lokumisela udaka

I-HPMC ichaphazela ixesha lokumisela udaka ngokuhlengahlengisa isantya se-samente yokusabela kwi-hydration. Imali efanelekileyo ye-HPMC inokwandisa ixesha lokwakhiwa kodaka kwaye iqinisekise ixesha elaneleyo lokulungelelanisa ngexesha lenkqubo yokwakha, kodwa ukusetyenziswa ngokugqithiseleyo kunokwandisa ixesha lokumisela kwaye kuthintele inkqubela yeprojekthi, ngoko ke idosi kufuneka ilawulwe ngokufanelekileyo.

3. Isiphumo somthamo we-HPMC ekusebenzeni kodaka

Idosi ye-HPMC kudaka iphantsi ngokubanzi, idla ngokuba phakathi kwe-0.1% kunye ne-0.5%. Idosi ethile ixhomekeke kuhlobo lodaka kunye neemfuno zokwakha:

Idosi ephantsi (≤0.1%): Inokuphucula ukugcinwa kwamanzi kunye nokuphucula kancinci ukusebenza kodaka, kodwa umphumo wokuqina ubuthathaka.

Idosi ephakathi (0.1%~0.3%): Iphucula ngokubonakalayo ugcino lwamanzi, ukuncamathelisa kunye nobuchule bokuchasana nodaka kunye nokuphucula ukusebenza kolwakhiwo.

I-dosage ephezulu (≥0.3%): Kuya kwandisa kakhulu i-viscosity yodaka, kodwa inokuchaphazela umbane, ukwandisa ixesha lokumisela, kwaye ingathandeki kulwakhiwo.

Njengesongezo esibalulekileyo sodaka,HPMCidlala indima ephambili ekuphuculeni ukugcinwa kwamanzi, ukuphucula ukusebenza kolwakhiwo, ukuqinisa ukubambelela kunye nokumelana nokuqhekeka. Ukongezwa okufanelekileyo kwe-HPMC kunokuphucula kakhulu ukusebenza ngokubanzi kodaka kunye nokuphucula umgangatho weprojekthi. Ngexesha elifanayo, i-dosage kufuneka ilawulwe ukuze igweme imiphumo emibi ekumiseni ixesha kunye nokwakhiwa kwamanzi. Kwixesha elizayo, ngophuhliso oluqhubekayo lweshishini lokwakha, amathuba okusetyenziswa kwe-HPMC kwizinto ezintsha zokwakha eziluhlaza ziya kuba zibanzi.