Hydroxypropyl Methylcellulose (HPMC) isiri-ionic cellulose ether inoshandiswa zvakanyanya mukuvaka zvinhu, chikafu, cosmetics, mishonga yemishonga nemimwe minda. Iyo inogadzirwa nemakemikari shanduko ye cellulose. Inowanzoita senge chena kana isina-chena poda uye inonyungudika zviri nyore mumvura kuita inoonekera kana zvishoma turbid colloidal solution.
Kemikari chimiro uye zvivakwa zveHPMC
HPMC inowanikwa nemethylation (kuunza methoxyl boka, -OCH₃) uye hydroxypropylation (kuunza hydroxypropoxyl boka, -CH₂CHOHCH₃) yeboka re hydroxyl (-OH) ye cellulose. Iyo methoxy uye hydroxypropoxy moieties muchimiro chayo inotarisisa kunyungudika kwayo uye viscosity zvimiro.
HPMC ine anotevera makuru maficha:
Kunyungudika kwemvura: HPMC inogona kunyungudika nekukurumidza mumvura inotonhora kugadzira yakakwira viscosity mhinduro.
Thermal gelation: HPMC mhinduro dzinogadzira gels kana yapiswa.
Kugadzikana: Inoramba yakagadzikana pasi pemamiriro maviri ane acidic uye alkaline uye haisi nyore kuderedzwa.
Kukora: Inogona kuwedzera zvakanyanya viscosity yeaqueous solution.
Mafirimu-ekugadzira zvivakwa: Inogona kugadzira firimu rakajeka uye rakasimba.
Lubricity: Inogona kuita basa rekuzora mune mamwe magadzirirwo.
Basa reHPMC mukunamatira mataira
Tile adhesive chinhu chekuvaka chinoshandiswa kuisa mataira eceramic, uye kuita kwayo kunokanganisa zvakananga kunaka uye kusimba kwepaving. HPMC inoita basa rakakosha mumataira anonamira, uye kuita kwayo chaiko ndekunotevera:
1. Kuvandudza kushanda kwebasa
HPMC inogona kuwedzera nguva yekushanda yekunamatira mataira, zvichiita kuti zvive nyore kune vashandi vekuvaka kugadzirisa nzvimbo yematairi mukati meimwe nguva yenguva. Izvi zvinodaro nekuti HPMC inogona kuwedzera kuchengetwa kwemvura kweanonamatira, nekudaro kunonoka kubuda kwemvura.
2. Wedzera kuchengetwa kwemvura
Kuchengetwa kwemvura ndechimwe chezvinhu zvakakosha zvematairi anonamira, ayo anotaridza kugona kweanonamira kuchengetedza unyoro panguva yekurapa. HPMC inodzivirira kurasikirwa nekukurumidza kwemvura nekugadzira viscous mvura firimu uye inova nechokwadi chekuti adhesive ine mvura yakakwana ye hydration reaction isati yapora. Ichi pfuma inonyanya kukosha kuve nechokwadi chesimba rebhondi uye kudzivirira kutsemuka.
3. Kuvandudza kusimba kwekubatana
Kuburikidza neayo firimu-kuumba uye kukora mhedzisiro, HPMC inogonesa iyo inonamira kuti inyatso kunamatira kumusoro kweceramic mataira uye substrates, nekudaro inovandudza kusimba kwekubatanidza. Panguva imwecheteyo, HPMC inogona zvakare kukwidziridza kutsvedza kweanonamira kudzivirira mataira kubva pakuchinja panguva yekuisa.
4. Kuvandudza kushanda kwekuvaka
Sezvo HPMC ichigona kuvandudza kuwirirana uye rheology yekunamatira tile, iyo inonamira inogona kupararira zvakaenzana panguva yekuvaka, zvichiita kuti kuvaka kuwedzere kuponesa basa. Uye zvakare, lubricity yayo inogona kuita kuti paving process iite mushe uye kuderedza kuoma kwekuvaka.
Zvimwe zvinoshandiswa zveHPMC mumakemikari ekuvaka
Pamusoro pekushandiswa kwayo mumatairi anonamira, HPMC ine akasiyana ekushandisa mumakemikari ekuvaka:
1. Simende dhaka
Mumadhaka ane simende, HPMC inoshandiswa seyakakora uye inochengetedza mvura. Inogona kuvandudza zvakanyanya kuita kwekuvaka kwedhaka, zvichiita kuti zvive nyore uye nyore kushandisa. Inogonawo kuwedzera nguva yekuvhura uye kugadzirisa simba uye kusimba mushure mekugadzirisa nekuoma.
2. Plastering system
Mukupura matope, HPMC inovandudza mashandiro ekuvaka uye kuchengetedza mvura, zvichiita kuti dhaka rive rakakodzera kuvakwa pasi pekupisa kwakanyanya kana hunyoro hunyoro. Mukuwedzera, HPMC inogona kuderedza shrinkage uye kuputika panguva yekupurasita.
3. Idhaka yekuzvimisa
Kuzvimisikidza dhaka kunoda zvakanyanya kuyerera uye kunamatira. Nekudzora kuwirirana uye rheology yedhaka, HPMC inogonesa dhaka rekuzvimisa kuti ripararire panguva yekuvaka kuti riite nzvimbo yakatsetseka, ichideredza kudiwa kwekupindira kwemaoko.
4. External wall insulation system
Mukunze kwemadziro ekudzivirira masisitimu, HPMC inoshanda seyakakora uye inochengeta mvura chikamu chebinder, ichiva nechokwadi chekuti bhodhi rekudzivirira rinogona kunamatira zvakasimba kumadziro uku ichivandudza kuramba kwemamiriro ekunze uye kusimba kwehurongwa.
Kungwarira pakushandisa HPMC
Kunyangwe HPMC iine akawanda mabhenefiti, anotevera mapoinzi anofanirwa kucherechedzwa mune anoshanda maapplication:
Dosage control: Yakawandisa dosage yeHPMC inogona kukonzera fluidity yeadhesive kuderera uye kukanganisa mabasa ekuvaka. Muyero wakakodzera unofanirwa kugadziridzwa zvinoenderana nezvinodiwa fomula.
Uniform dispersion: Paunenge uchigadzira zvinonamira, HPMC inoda kuparadzirwa zvizere kuti ive nechokwadi chekuti kuita kwayo kunogona kuitwa zvakaenzana. Inowanzonyungudutswa mumvura kutanga uye ipapo zvimwe zvikamu zvinowedzerwa.
Kukanganisa kwezvakatipoteredza: HPMC inotarisisa tembiricha uye hunyoro, uye kukanganisa kwenzvimbo dzakasiyana dzekuvaka kunofanirwa kutariswa kana uchigadzira fomula.
Basa reHPMC mumatairi anonamira uye mamwe ekuvaka makemikari admixtures haagone kufuratirwa. Yakanakisa kuchengetedza kwemvura, kukora, kunamatira uye zvivakwa zvekuvandudza zvivakwa zvakavandudza zvakanyanya kunaka kwezvinhu zvekuvaka uye kugona kwekuvaka. Nekugadzira kwakaringana dhizaini uye kushandisa, HPMC inogona kuvandudza zvakanyanya mwero wekubudirira uye kugadzikana kwenguva refu kwemapurojekiti ekuvaka.
Nguva yekutumira: Jun-25-2024