Hydroxypropyl methylcellulose (HPMC), seimwe ye ethers dzinokosha dze cellulose mumazuva ano dry-mix mortar systems, inoita basa guru mu tile adhesives. Nekukura kwehukuru hwemataira, kuoma kwenzvimbo dzekuvaka, uye kuvandudzwa kuri kuramba kuchienderera mberi kwemitemo ye bonding strength, basa reHPMC mukugadzira rinova rakakosha zvikuru. Ingave C1/C2 type tile adhesives kana high-performance adhesive systems dzema tile anorema, ma form tile makuru, uye ma low water-absorption tile, HPMC inoita basa rakakosha mukuvandudza kushanda, kuwedzera kugara kwenguva refu, uye kuwedzera simba re bonding.
1. Kuvandudza Kuchengetwa Kwemvura Kuti Ive Nechokwadi Chekuti Mvura Inowanikwa Zvakakwana
Zvinonamira zvemataira zvidhinha zvitete, zvine ukobvu hwe3–5 mm. Zvinokurumidza kurasikirwa nemvura nekuda kwekunwa mvura nekukurumidza nesubstrate, tembiricha yakakwira, kana kuomeswa nemhepo.
HPMC inonyatso vhara mvura isina chinhu nekugadzira chimiro chakasimba chenetwork mumota, zvichivandudza zvakanyanya mwero wekuchengetedza mvura wechinamira chetaira. Kazhinji, HPMC yemhando yepamusoro inogona kuwana mwero wekuchengetedza mvura we90%–98%.
Migumisiro yekuchengetwa kwemvura inosanganisira:
Kuderedza mwero wemvura inoyerera yesimende, zvichivandudza simba rekubatanidza;
Kudzivirira kurasikirwa nemvura nekukurumidza, kutsemuka, uye kupatsanuka;
Kuvandudza kugadzikana kwekunamatira kwemataira pamataira asinganyungudi mvura yakawanda (senge mataira eporcelain nemataira ane glazed).
2. Kuvandudza Hunhu hweRheological uye Kuvandudza Kushanda
Kushanda zvakanaka chiratidzo chakakosha chekuti namatire yemataira ichagamuchirwa here nemapoka ekuvaka. HPMC inovandudza zvakanyanya hunhu hwe rheological hwemota, zvichiita kuti namatire yemataira ikwanise kupararira zviri nani uye ive thixotropy.
Zviratidzo zvikuru zvekuvandudzwa kwerheology:
thixotropy yakanaka: Kuchekerera ganda, kuri nyore kupararira; kupora nekukurumidza mushure mekumira, hapana kutsvedza.
Kuwedzerwa kwemafuta: Zvinoita kuti kukwesha trowel kuve nyore, zvichivandudza kushanda zvakanaka kwekuvaka.
Kunatsiridza kufanana uye kugadzikana kwepaste: Kunodzivirira kupatsanurwa kwedhaka, kupatsanurwa, uye kubuda ropa.
Kune mataira makuru uye madziro ane matanda akawanda, hunhu hwe thixotropic hweHPMC hwakakosha zvikuru, kudzivirira kutsvedza kwemataira uye kunatsiridza mashandiro ekudzivirira kutsvedza panzvimbo dzakamira.
3. Nguva Yakavandudzwa Yekuvhura uye Nguva Yekugadzirisa
Mukuvaka mataira emazuva ano anonamira, kuwedzera nguva yekuvhura kunovandudza kushanda zvakanaka kwemataira uye kunoderedza kugadziriswa patsva.
HPMC inononotsa kubuda kwemvura kubva pamusoro pechigubhu, zvichiita kuti chigubhu chirambe chakanyorova uye ichipa vashandi nguva yakawanda yekupedzisa kuisa nekugadzirisa.
Migumisiro yakajairika:
Nguva yekuvhura inogona kuwedzerwa kusvika kumaminitsi makumi maviri kusvika makumi matatu.
Nguva yakawedzerwa yekugadzirisa inoita kuti mataira ane mafomu makuru akwanise kuiswa zvakanaka.
HPMC chinhu chakakosha chekuwedzera kune manamati emataira emhando yeC2 anoshanda zvakanyanya anoda nguva yakareba yakavhurika.
4. Simba Rakawedzerwa reKubatanidza uye Kugadzikana kweChimiro
HPMC haisi "binder" mupfungwa yemakemikari, asi inovandudza zvakanyanya simba rekubatanidza kwematiles ekunamira nekuvandudza maitiro emvura yesimende, kugadzirisa chimiro chematiles, uye kuwedzera huwandu hwematiles.
Kuvandudzwa kunosanganisira:
Kuchengetwa kwemvura kunoita kuti mvura irambe ichinyorova zvakakwana, zvichiita kuti pave nezvigadzirwa zvakawanda zveCSH gel.
Inogadzirisa chimiro chemota uye inovandudza kugona kwekubatanidza pakati pechiso.
Inodzivirira kusava nechinhu chinopinda mumaziso uye inovandudza kunaka kwekubatana uye kugara kwenguva refu.
Mhedzisiro yayo inonyanya kuoneka mukusungana kwemataira ane vitrified uye mataira asinganyuri mvura yakawanda.
5. Kuramba Kutsvedza Kwakavandudzwa uye Kuramba Kutsvedza
Kusatsvedza kwemvura panguva yekuisa mataira akamira chiratidzo chakakosha chezvinonamira mataira.
Hunhu hwakawanda hwe thixotropic hweHPMC hunoita kuti namati yemataira iwane simba rekukurumidzira mushure mekushandisa, zvichidzivirira mataira kuti asatsvedzerere pasi nekuda kwehuremu hwawo.
Kunyanya pakugadzira mataira makuru uye mataira makuru ane glazed, HPMC ine viscosity yakakura, yakatsiviwa zvakakodzera inokosha pakudzivirira kutsvedza.
6. Mazano ekusarudza HPMC Dosage uye Viscosity
Mumaforoma ekunamira emataira, huwandu hweHPMC hunowanzova hwakaderera, asi simba rayo rakakura.
Huwandu hwekuwedzera hwakajairika: 0.2%–0.4%
Huwandu chaihwo hunoenderana ne: rudzi rwesimende, chiyero chekuzadza, nzvimbo yekuvaka, uye saizi yemataira. Zvinokurudzirwa zveViscosity (25°C, 2% solution):
Namatira yemataira yemhando yeC1 yakajairika: 40,000–60,000 mPa·s
Kunamira mataira emhando yeC2 inoshanda zvakanyanya: 75,000–100,000 mPa·s kana kupfuura
Chinonamira mataira emhando hombe: ≥100,000 mPa·s, giredhi repamusoro rethixotropic
HPMC, sechinhu chakakosha mumasisitimu ekunamira mataira, inopa zvakanakira zvakawanda zvehunyanzvi mukuvandudza kuchengetwa kwemvura, rheology, simba rekubatanidza, uye kuramba kutsvedza. Ingave iri yekuisa mataira pamadziro nepasi kana kushandisa mataira makuru, kusarudzwa nekushandiswa kweHPMC yemhando yepamusoro kwakakosha pakuona kushanda kwakasimba kwekutaira uye hunhu hwekuvaka hwakavimbika. Kune vagadziri vemataira vanotevera kushanda kwepamusoro, kusarudza giredhi rakakodzera reHPMC kwakakosha.
Nguva yekutumira: Zvita-11-2025