Basa reHPMC mu gypsum binder

Hydroxypropyl Methylcellulose (HPMC)i-non-ionic cellulose ether. Nekuda kwehunhu hwayo hwakanaka hwepanyama uye hwemakemikari, inoshandiswa zvakanyanya muzvinhu zvekuvaka, kunyanya sechinhu chakakosha chekuwedzera muzvinhu zvakagadzirwa negypsum. Kushandiswa kweHPMC mu gypsum binder kunonyanya kuratidzwa mukuvandudza mashandiro ekuvaka, kuwedzera kunamira, kuwedzera nguva yekuvhurika, kugadzirisa kuchengetedza mvura uye kuvandudza mashandiro ese ezvinhu.

1. Kuvandudza mashandiro ekuvaka

Muzvibatiso zvegypsum zvakaita segypsum mortar kana gypsum putty, kuwedzerwa kweHPMC kunovandudza kushanda kwechinhu chacho. Kunyorova kwayo kwakanaka uye purasitiki zvinoita kuti gypsum yakasanganiswa ive nyore kuyerera uye kushandiswa kwayo. HPMC inogona kupararira zvakaenzana panguva yekusanganisa, kuputira zvidimbu zvakasimba, zvichiita kuti dhaka rese rive rakafanana uye rinoshanda zviri nani, zvichiita kuti zvive nyore kuti vashandi vekuvaka vashandise, uye kuvandudza kushanda zvakanaka kwechivakwa uye kunaka kwechivakwa.

2. Wedzera kuchengetwa kwemvura

HPMC ine kugona kwakasimba kwekunwisa nekubata mvura, inova imwe yehunhu hwayo hwakakosha. Muzvinhu zvegypsum, kuchengetedza mvura chiratidzo chikuru chinokanganisa kukurumidza kwekuoma uye kukura kwesimba. Sezvo kuoma kwegypsum kunoenderana nekuita kwemvura, kana mvura ikapwa nguva isati yakwana kana ikanyudzwa nechigadziko, gypsum haizonyungudike zvakakwana, zvichikonzera matambudziko akadai sehupfu nekutsemuka. HPMC inoumba jira re viscoelastic film rekuputira mvura, kunonoka kurasikirwa nemvura, kuve nechokwadi chekuti gypsum inonyungudika, uye nokudaro inovandudza huwandu uye kugara kwenguva refu kwechigadzirwa chapera.

3. Wedzera nguva yekuvhura uye gadzirisa nguva yekugadzika

HPMC inewo simba rekugadzirisa nguva yekuisa gypsum. Nekudzora huwandu hwayo hwekuwedzera, kumhanya kwekuisa gypsum kunogona kunonoka, zvichipa vashandi vekuvaka nguva yakakwana yekushanda, iyo inonyanya kukodzera kupurasita munzvimbo yakakura uye kuputira zvivakwa zvakaoma. Kuwedzera nguva yekuvhura zvinoreva kuti zvinhu hazvizorasikirwi nemvura nekutsemuka nekukurumidza panguva yekuvaka, izvo zvinobatsira kuvandudza kugadzikana uye mhedzisiro yekushongedza kwechigadzirwa chapera. Panguva imwe chete, zvinobatsirawo kudzora maitiro ekuvaka ane michina uye zvinovandudza kushanda zvakanaka kwekuvaka.

4. Kuvandudza simba rekubatana

HPMC ine hunhu hwakanaka hwekuumba firimu. Chimiro chefirimu re organic polymer chinoumbwa panguva yekuomesa gypsum chinogona kuvandudza kubatana pakati payo ne substrate. Firimu iri haringobatsiri chete kubatana pakati pezvikamu zvakasiyana-siyana mukati mechinhu, asiwo rinobatsira kunamira pakati pe gypsum mortar ne base layer (senge madziro ezvidhinha, kongiri, nezvimwewo), nokudaro richideredza matambudziko emhando yekuvaka akadai sekukanda maburi nekuisa maburi. Kunyanya kana ikaiswa pa putty layer, HPMC inogona kuvandudza mashandiro ayo ekunamira uye kuita kuti ive yakasimba uye yakavimbika.

5. Kushanda kwekudzivirira kutsvedza

Panguva yekuvaka madziro akamira, kunyanya muma tile adhesives kana gypsum plaster layers, kuwedzerwa kweHPMC kunowedzera zvakanyanya kugona kwechinhu ichi kudzivirira kutsvedza. Nekuti inowedzera thixotropy yeslurry, ndiko kuti, ine fluidity yakanaka pasi pekukurunga uye viscosity yakasimba pasi pemamiriro ezvinhu asingachinji, inogona kutsigira zvinobudirira kunamira kwakasimba kwechinhu chiri pamadziro uye kudzivirira chinhu kuti chisatsvedze. Iyi ivimbiso yakakosha kwazvo yekushanda kwemabasa ekukwenya madziro uye caulking.

6. Kuvandudza kuramba kwetsvina uye kugara kwenguva refu

Nekuda kwekudzora mvura zvinobudirira neHPMC, hydration reaction yegypsum yakakwana panguva yekuoma, nokudaro ichigadzira zvigadzirwa zvakawanda zve crystalline hydration uye kuwedzera density yechivakwa. Maumbirwo e polymer network akaumbwa neHPMC anobatsira kuderedza kushushikana kwemukati kunokonzerwa nekupwanyika kana kuwedzera kupisa uye kudzikira, kuderedza njodzi yekutsemuka, uye kuvandudza kugadzikana kwese kwechigadzirwa chapera. Panguva imwe chete, ine flexibility yakati, iyo inovandudza impact resistance uye crack resistance yezvigadzirwa zvegypsum.

7. Gadzirira kune akasiyana masisitimu egypsum

HPMC inogona kushandiswa zvakanyanya muzvigadzirwa zvakasiyana-siyana zvegypsum, zvinosanganisira β gypsum, α gypsum, desulfurized gypsum, nezvimwewo, uye inoratidza kubatana kwakanaka uye kugadzikana mumasisitimu akasiyana. Inewo mhedzisiro yakanaka yekubatana pazvikamu zvakasiyana uye zvinowedzera, izvo zvinogona kubatsira mainjiniya ekugadzira kugadzirisa mashandiro echigadzirwa zvichienderana nezvinodiwa chaizvo uye kuita kuti chigadzirwa chigadzirwe.

Sechinowedzera chinoshanda zvakanaka,HPMC ine mabasa akawanda akanaka mukubatanidza gypsum.Hazvingogadzirisi chete hunhu hwegypsum, zvakaita sekushanda zvakanaka, kuchengetedza mvura, kunamira, nezvimwewo, asiwo zvinovandudza hupenyu hwebasa uye mhando yezvigadzirwa zvegypsum. Nekukurudzirwa kwakadzama kwezvinhu zvekuvaka zvakasvibira uye pfungwa dzekuchengetedza simba nekuchengetedza nharaunda, HPMC ichaita basa rakakosha mumunda wezvigadzirwa zvegypsum nedhaka rakasanganiswa rakaoma mune ramangwana, uye ndeimwe yezvakakosha zvekuwedzera zvezvinhu zvemazuva ano zvekuvaka.