HPMC yedhaka rakasanganiswa rakaoma

Hunhu hweHPMC mudhaka rakaoma rakasanganiswa

1, HPMC mune hunhu hwedhaka rakajairika

HPMC inonyanya kushandiswa semushonga unodzoreredza mvura uye unochengetedza simende muchiyero chesimende. Muzvikamu zvekongiri nedhaka, inogona kuvandudza viscosity uye shrinkage rate, kusimbisa simba rekubatanidza, kudzora nguva yekugadzika kwesimende, uye kuvandudza simba rekutanga uye simba re static flexural. Nekuti ine basa rekuchengetedza mvura, inogona kuderedza kurasikirwa nemvura pamusoro pekugwamba, inogona kudzivirira kuitika kwezvimedu pamucheto, uye inogona kuvandudza kunamira uye mashandiro ekuvaka. Kunyanya mukuvaka, inogona kuwedzera nekugadzirisa nguva yekugadzika, nekuwedzera kwemuyero weHPMC, nguva yekugadzika dhaka yakawedzerwa; Kuvandudza mashandiro ekugadzira nekupomba, kwakakodzera kuvaka nemashini; Inogona kuvandudza mashandiro ekuvaka uye kudzivirira kukanganiswa kwemunyu unonyunguduka mumvura pamusoro pechivako.

2, HPMC ine hunhu hwakakosha hwedhaka

HPMC imushonga unoshanda wekuchengetedza mvura padhaka rakaoma, izvo zvinoderedza kubuda ropa uye mwero wekupatsanura dhaka uye zvinovandudza kubatana kwedhaka. HPMC inogona kuvandudza zvakanyanya simba rekusunga uye simba rekubatanidza dhaka, kunyangwe simba rekukotama uye simba rekudzvanya dhaka richideredzwa zvishoma neHPMC. Pamusoro pezvo, HPMC inogona kudzivirira kuumbwa kwemapundu epurasitiki mudhaka, kuderedza indekisi yekupwanya dhaka repurasitiki, kuchengetedza mvura mudhaka kunowedzera nekuwedzera kwehukobvu hweHPMC, uye kana hukobvu hwacho huchipfuura 100000mPa•s, kuchengetedza mvura hakuchawedzere zvakanyanya. Kupfava kweHPMC kunewo mhedzisiro yakati pahuwandu hwekuchengetedza mvura mudhaka, kana dhaka rakanaka, mwero wekuchengetedza mvura mudhaka wavandudzwa, unowanzo shandiswa padhaka resimende saizi yedhaka reHPMC inofanira kunge iri pasi pe180 microns (80 mesh screen). Hunhu hwakakodzera hweHPMC mudhaka rakaoma i1‰ ~ 3‰.

2.1, dhaka reHPMC rakanyungudutswa mumvura, nekuti basa repamusoro rinoita kuti zvinhu zvakasanganiswa zvive zvakaenzana muhurongwa, uye HPMC semhando yekudzivirira colloid, "package" zvidimbu zvakasimba, uye pamusoro payo pekunze kuti pave nerukoko rwefirimu rinozora, zvichiita kuti slurry system ive yakagadzikana, uye dhaka rinomutswawo mukusanganiswa kwemvura uye kuvaka kwedhisiki kunogonawo kuvakwa.

2.2 Mhinduro yeHPMC nekuda kwehunhu hwayo hwemamorekuru, zvekuti mvura iri mudhaka haisi nyore kurasikirwa nayo, uye inoburitswa zvishoma nezvishoma munguva yakareba, ichipa dhaka kuchengetedza mvura zvakanaka uye kuvaka. Inodzivirira mvura kuti isafambe nekukurumidza kubva mudhaka kuenda pasi, kuitira kuti mvura yakachengetedzwa irambe iri pamusoro pechinhu chitsva, izvo zvinosimudzira kunyorova kwesimende uye zvinovandudza simba rekupedzisira. Kunyanya, kana interface inosangana nedhaka resimende, plaster uye binder ikarasikirwa nemvura, chikamu ichi hachina simba uye hapana simba rekubatanidza. Kazhinji, pamusoro pezvinhu izvi imizimba yekunyudza, inenge ichitora mvura kubva pamusoro, zvichiita kuti chikamu ichi chemvura chisakwane, zvekuti dhaka resimende ne ceramic tile substrate ne ceramic tile kana plaster uye metope bond simba rinoderera.

Mukugadzira dhaka, kuchengetedza mvura kweHPMC ndiyo basa guru. Zvakaratidzwa kuti kuchengetedza mvura kunogona kusvika 95%. Kuwedzera kwehuremu hwemamorekuru eHPMC uye chiyero chesimende zvichavandudza kuchengetedza mvura uye simba rekubatanidza dhaka.

Muenzaniso: nekuti chinobatanidza mataira chinofanira kunge chine simba guru rekubatanidza pakati pehwaro netaira, saka chinobatanidza chinokanganiswa nezvinhu zviviri zvemvura inonyungudika; Nzvimbo dzehwaro (madziro) nemataira. Mataira eceramic akakosha, musiyano wemhando wakakura zvikuru, mamwe maburi akakura kwazvo, mwero wekunyudzwa kwemvura nemataira eceramic wakakwira, zvekuti mashandiro echinobatanidza anoparadzwa, chinhu chinochengetedza mvura chakakosha, uye kuwedzerwa kweHPMC kunogona kuzadzisa zvinodiwa izvi.

2.3 HPMC yakasimba kune acids nemabases, uye mvura yayo inogadzikana zvikuru muhuwandu hwe pH = 2 ~ 12. Caustic soda nemvura ye lime hazvina simba guru pahunhu hwayo, asi alkali inogona kukurumidzisa mwero wayo wekunyungudika, uye kuwedzera zvishoma viscosity.

2.4, yakawedzera kuti mashandiro ekuvaka dhaka reHPMC avandudzwa zvakanyanya, dhaka rinoita serine "mafuta", rinogona kuita kuti majoini emadziro azere, akatsetseka, kuitira kuti mataira kana zvidhinha nechigadziko zvisimbise, uye zvinogona kuwedzera nguva yekushanda, zvakakodzera nzvimbo yakakura yekuvaka.

2.5 HPMC rudzi rwe electrolyte isiri ionic uye isiri polymeric. Yakasimba zvikuru mumvura ine munyu wesimbi uye organic electrolytes, uye inogona kuwedzerwa muzvinhu zvekuvaka kwenguva yakareba kuti ive nechokwadi chekuti inogara kwenguva refu.

Maitiro ekugadzira HPMC anonyanya kuitwa nedonje fiber (yemumba) mushure mekugadziriswa kwealkali, etherification uye kugadzirwa kwezvigadzirwa zve polysaccharide ether. Haina chaji pachayo, uye haishande nemaion ane chaji mujelled material, uye mashandiro ayo akagadzikana. Mutengo wayo wakaderera pane mamwe marudzi e cellulose ether, saka inoshandiswa zvakanyanya mu dry mortar.

Hydroxypropyl methyl cellulose HPMCbasa muhari yakaoma yakasanganiswa:

HPMCinogona kuita kuti dhaka idzva rive rakakora kuitira kuti rive nekunyorova kwakati, kudzivirira kupatsanurwa. Kuchengetwa kwemvura (kukobvu) ndiyo inonyanya kukosha, ichibatsira kuchengetedza huwandu hwemvura yakasununguka mudhaka, nokudaro ichipa simende nguva yakawanda yekunyorova mushure mekunge dhaka raiswa. (kuchengetwa kwemvura) mhepo yayo pachayo, inogona kuunza mabhuru madiki akafanana, kuvandudza kuvakwa kwedhaka.

Hydroxypropyl methyl cellulose ether viscosity iri nani kana mvura yakawandisa. Viscosity ndiyo parameter inokosha yekushanda kweHPMC. Parizvino, vagadziri vakasiyana veHPMC vanoshandisa nzira dzakasiyana siyana nemidziyo kuti vaone viscosity yeHPMC. Nzira huru ndiHaakeRotovisko, Hoppler, Ubbelohde naBrookfield, nezvimwewo.

Pachigadzirwa chimwe chete, mhedzisiro ye viscosity inoyerwa nenzira dzakasiyana dzakasiyana kwazvo, dzimwe dzinotova nemisiyano yakawanda. Saka, kana uchienzanisa viscosity, inofanira kuitwa pakati penzira imwe chete yekuyedza, kusanganisira tembiricha, rotor, nezvimwewo.

Kana paine saizi yezvikamu, kana zvikamu zvidiki, ndipo panowanikwa mvura yakawanda. Zvikamu zvikuru zve cellulose ether zvikasangana nemvura, pamusoro pazvo zvinonyunguduka pakarepo zvoita gel yekuputira zvinhu kuti zvidzivirire mamorekuru emvura kuti asarambe achipinda, dzimwe nguva kusanganisa kwenguva refu hakugone kupararira zvakaenzana, kuumbwa kwemushonga une madhaka kana agglomerate. Kunyunguduka kwe cellulose ether chimwe chezvinhu zvinoita kuti usarudze cellulose ether. Kunyunguduka zvakare chiratidzo chakakosha che methyl cellulose ether. MC ye dry mortar inoda hupfu, mvura shoma, uye kunyunguduka kwe20% ~ 60% particle size isingasviki 63um. Kunyunguduka kunokanganisa kunyunguduka kwe hydroxypropyl methyl cellulose ether. Coarse MC inowanzo kuve granular uye inogona kunyunguduka nyore nyore mumvura isina kuungana, asi kumhanya kwekunyunguduka kunononoka, saka haina kukodzera kushandiswa mu dry mortar. Mudhaka rakaoma, MC inoparadzirwa pakati pezvinhu zvakasanganiswa, zvinhu zvinozadza zvakanaka nezvinhu zvekusimbisa zvakaita sesimende, uye hupfu hwakakwana chete ndihwo hunogona kudzivirira kuungana kwemethyl cellulose ether kana ichisanganiswa nemvura. Kana MC ikawedzera mvura kuti inyungudike, zvinonetsa zvikuru kuiparadzira nekuinyungudutsa. MC ine hutete hwakakora haingorasikirwi chete, asiwo inoderedza simba redhaka. Kana dhaka rakaoma rakadaro rakagadzirwa munzvimbo yakakura, kumhanya kwedhaka rakaoma remunharaunda kunodzikira zvakanyanya, zvichikonzera kutsemuka kunokonzerwa nenguva dzakasiyana dzekuchenesa. Kune dhaka rekupfapfaidza nemechanical, nekuda kwenguva pfupi yekusanganisa, hutete hwacho hwakakwira.

Kazhinji, kana viscosity yakakwira, zvinoita kuti mvura irambe ichichengetwa zvakanaka. Zvisinei, kana viscosity yakakwira, huremu hweMC hunowedzera, uye mashandiro ekunyungudika achadzikirawo, izvo zvine mhedzisiro yakaipa pakusimba uye mashandiro ekuvaka kwemortar. Kana viscosity yakakwira, zvinoita kuti tortar iwedzere kusimba, asi hazvienderane nehukama hwayo. Kana viscosity yakakwira, mortar yakanyorova ichave yakanyanyiswa zvakanyanya, zvese kuvaka, mashandiro e sticky scraper uye kunamatira kwakanyanya kune hwaro hwezvinhu. Asi hazvibatsiri kuwedzera simba rekuvaka remortar yakanyorova. Nemamwe mashoko, mashandiro e anti-sag haasi pachena panguva yekuvaka. Kusiyana neizvi, mamwe ma methyl cellulose ethers ane viscosity yakaderera asi akagadziriswa ane mashandiro akanaka mukuvandudza simba rekuvaka remortar yakanyorova.

Kuchengetwa kwemvura kweHPMC kune chekuitawo netembiricha yekushandisa, uye kuchengetwa kwemvura kwemethyl cellulose ether kunoderera nekuwedzera kwetembiricha. Asi mukushandiswa chaiko kwezvinhu, nzvimbo dzakawanda dzedry mortar dzinowanzo kuve mutembiricha yakakwira (yakakwirira kupfuura madhigirii makumi mana) pasi pemamiriro ekuvakwa musubstrate inopisa, senge kuputirwa kwekunze kwemadziro ekunze, izvo zvinowanzo kurumidzisa kusimba kwesimende uye kuomarara kwedry mortar. Kudzikira kwehuwandu hwekuchengetedza mvura kunotungamira kune kunzwa kuri pachena kwekuti zvese kugona kuvaka uye kuramba kupwanyika zvinokanganiswa. Mumamiriro ezvinhu aya, kuderedza simba rezvinhu zvetembiricha kunonyanya kukosha. Panyaya iyi, methyl hydroxyethyl cellulose ether additive parizvino inoonekwa seiri pamberi pekuvandudzwa kwetekinoroji. Kunyangwe nekuwedzera kwemethyl hydroxyethyl cellulose dosage (fomula yezhizha), kusimba kwekuvaka nekupwanyika hakugone kusangana nezvinodiwa zvekushandisa. Kuburikidza nekurapa kwakakosha kweMC, senge kuwedzera mwero we etherification, MC inogona kuchengetedza mhedzisiro iri nani pasi petembiricha yakakwira, kuitira kuti igone kupa mashandiro ari nani pasi pemamiriro akaoma.

HPMC ine tembiricha yejeli, inogona kukamurwa kuita mhando 60, 65, 75. Kune dhaka rakajairika rakasanganiswa uchishandisa mabhizinesi ejecha rerwizi, zviri nani kusarudza dhaka rakakwirira 75 HPMC. Chiyero cheHPMC hachifanirwe kunge chakanyanya kukwira, chakanyanya kukwira chichawedzera kudiwa kwemvura yedhaka, chichanamatira kuplaster, nguva yekunyorovesa yakareba zvakanyanya, zvichikanganisa kuvakwa. Zvigadzirwa zvakasiyana zvedhaka zvinosarudza viscosity yakasiyana yeHPMC, usashandise viscosity yakanyanya yeHPMC. Nekudaro, kunyangwe zvigadzirwa zvehydroxypropyl methyl cellulose zvakanaka, asi zvakanaka kusarudza HPMC chaiyo ndiyo basa guru revashandi verabhoritari vebhizinesi. Parizvino, kune vatengesi vazhinji vasiri pamutemo mukomboni neHPMC, mhando yacho yakaderera, rabhoritari inofanira kunge iri musarudzo yeimwe cellulose, ita bvunzo yakanaka, ive nechokwadi chekugadzikana kwezvigadzirwa zvedhaka, usachiva zvakachipa, zvichikonzera kurasikirwa kusingakoshi.