Kuwanda kwekusimba kweHPMChydroxypropyl methyl cellulose, zvinoita kuti kuchengetedza mvura kurambe kuri nani. Viscosity chinhu chakakosha pakushanda kweHPMC. Parizvino, vagadziri vakasiyana veHPMC vanoshandisa nzira dzakasiyana siyana nemidziyo kuti vaone viscosity yeHPMC. Nzira huru ndedzeHaake Rotovisko, Hoppler, Ubbelohde naBrookfield, nezvimwewo.
Pachigadzirwa chimwe chete, mhedzisiro ye viscosity inoyerwa nenzira dzakasiyana yakasiyana zvikuru, dzimwe dzinotova nemisiyano yakawanda. Saka, kana uchienzanisa viscosity, inofanira kuitwa pakati penzira imwe chete yekuyedza, kusanganisira tembiricha, rotor, nezvimwewo.
Kana tichitaura nezvehukuru hwezvikamu, kana zvikamu zvikatetepa, zvinoita kuti mvura irambe ichichengetwa zvakanaka. Zvikamu zvikuru zve cellulose ether zvikasangana nemvura, pamusoro pazvo zvinonyunguduka pakarepo zvoita gel yekuputira zvinhu kudzivirira mamorekuru emvura kuti asarambe achipinda, dzimwe nguva kusanganisa kwenguva refu hakugone kupararira zvakaenzana, kuumbwa kwemusanganiswa wematope kana agglomerate. Kunyunguduka kwe cellulose ether chimwe chezvinhu zvinoita kuti usarudze cellulose ether. Kunyunguduka zvakare chiratidzo chakakosha chekushanda kwe methyl cellulose ether. MC yedhaka rakaoma inoda hupfu, huwandu hushoma hwemvura, uye kunyunguduka kwe 20% ~ 60% saizi yezvikamu pasi pe 63um. Kunyunguduka kunokanganisa kunyunguduka kweHPMChydroxypropyl methyl cellulose ether. MC yakaoma inowanzova granular uye inogona kunyungudutswa nyore nyore mumvura isina kuungana, asi kumhanya kwekunyungudutswa kunononoka, saka haina kukodzera kushandiswa mudhaka rakaoma. Mudhaka rakaoma, MC inopararira pakati pezvinhu zvakasanganiswa, fillers dzakapfava nezvinhu zvekusimbisa zvakaita sesimende, uye hupfu hwakakwana chete ndihwo hunogona kudzivirira kuungana kwemethyl cellulose ether kana ichisanganiswa nemvura. Kana MC ikawedzera mvura kuti inyungudutse agglomerate, zvakaoma zvikuru kuiparadzira nekuinyungudutsa. MC ine kupfava kwakanyanya haingorasiki chete, asiwo inoderedza simba redhaka remunharaunda. Kana dhaka rakaoma rakadaro rakavakwa munzvimbo yakakura, kumhanya kwekupfapfaidza kwedhaka rakaoma remunharaunda kunoderedzwa zvakanyanya, zvichikonzera kutsemuka kunokonzerwa nenguva dzakasiyana dzekupfapfaidza. Kune dhaka rekupfapfaidza remakanika, nekuda kwenguva pfupi yekusanganisa, kupfapfaidza kwacho kwakanyanya.
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. Panguva yekuvaka, mashandiro e anti-sag haasi pachena. Kusiyana neizvi, mamwe ma methyl cellulose ethers ane viscosity yakaderera asi akagadziriswa ane mashandiro akanaka mukuvandudza simba rekuvaka remortar yakanyorova.
Kana cellulose ether yakawanda ikaiswa mumota, zvinoita kuti mvura irambe ichichengetwa zvakanaka, viscosity yacho inowedzera, uye zvinoita kuti mvura irambe ichichengetwa zvakanaka.
Kupfava kweHPMC kunewo mhedzisiro yakati pakuchengetwa kwemvura, kazhinji, nekuda kwekupenya kwakafanana uye kupfava kwakasiyana kwemethyl cellulose ether, kana paine huwandu hwakaenzana hwekuwedzera, mhedzisiro yekuchengetwa kwemvura iri nani.
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 kwemadziro ekunze kwekunze, izvo zvinowanzo kurumidzisa kusimba kwesimende uye kuomarara kwedry mortar. Kudzikira kwehuwandu hwekuchengetedza mvura kunotungamira kune kunzwa kuri pachena kuti zvese kugona kuvaka uye kuramba kupwanyika zvinokanganiswa. Mumamiriro ezvinhu aya, kuderedza simba rezvinhu zvetembiricha kunova kwakakosha zvikuru. Kunyangwe kuwedzerwa kwemethyl hydroxyethyl cellulose ether kuchionekwa sekwakanyanya kukosha mukuvandudzwa kwetekinoroji, kuvimba kwayo netembiricha kucharamba kuchitungamira mukushomeka kwehunhu hwedry mortar. Kunyangwe nekuwedzera kwemethyl hydroxyethyl cellulose dosage (fomula yezhizha), kuvaka uye kuramba kupwanyika hazvigone kusangana nezvinodiwa zvekushandisa. Kuburikidza nekurapa kwakakosha kweMC, sekuwedzera mwero we etherification, simba rekuchengetedza mvura reMC rinogona kuchengetedza simba riri nani kana tembiricha yakakwira, kuitira kuti igone kupa mashandiro ari nani kana mamiriro ekunze akaoma.
Nguva yekutumira: Chivabvu-18-2022