Zita rekuti HPMC muchiChinese ndi hydroxypropyl methylcellulose. Haina ionic uye inowanzoshandiswa semushonga unochengetedza mvura mudhaka rakasanganiswa nemvura. Ndiyo inonyanya kushandiswa kuchengetedza mvura mudhaka. Chinhu chinogadzirwa ne polysaccharide-based ether chinogadzirwa ne alkalization uye etherification. Haina chaji pachayo, haishande nemaion akachajwa ari mujelling material, uye ine mashandiro akagadzikana. Mutengo wayo wakadererawo pane mamwe marudzi e cellulose ethers, saka inoshandiswa zvakanyanya mudhaka rakasanganiswa nemvura.
Basa rehydroxypropyl methylcellulose: Inogona kukora dhaka richangobva kusanganiswa kuti rive nekunyorova kwakati uye kudzivirira kupatsanurwa. (Kukora) Kuchengetwa kwemvura ndicho chinhu chakakoshawo, chinobatsira kuchengetedza huwandu hwemvura yakasununguka mudhaka, kuitira kuti mushure mekunge dhaka ragadzirwa, zvinhu zvinosimbisa simende zvine nguva yakawanda yekuwedzera mvura. (Kuchengetwa kwemvura) Ine hunhu hwekupinda mumhepo, izvo zvinogona kuunza mabubble emhepo akafanana uye akanaka kuti ivandudze kuvaka dhaka.
Kana viscosity yehydroxypropyl methylcellulose ether yakakwira, zvinoita kuti kuchengetedza mvura kurambe kuri nani. Pachigadzirwa chimwe chete, viscosity inoyerwa nenzira dzakasiyana yakasiyana zvikuru, uye dzimwe dzine musiyano wakapetwa kaviri. Saka, kana uchienzanisa viscosity, inofanira kuitwa pakati penzira dzakafanana dzekuedza, kusanganisira tembiricha, rotor, nezvimwewo.
Kana tichitaura nezvehukuru hwezvimedu, kana zvimedu zvakatetepa, ndipo panobva pava nekuchengetwa kwemvura. Kana zvimedu zvikuru zve cellulose ether zvasangana nemvura, pamusoro payo panobva panyunguduka uye panobva paita jeri rekuputira zvinhu izvi kudzivirira mamorekuru emvura kuti asarambe achipinda. Dzimwe nguva hazvigone kupararira zvakaenzana uye kunyunguduka kunyangwe mushure mekukurunga kwenguva refu, zvichigadzira mhinduro ine makore kana agglomeration. Zvinokanganisa zvakanyanya kuchengetwa kwe cellulose ether, uye kunyunguduka ndechimwe chezvinhu zvinosarudza cellulose ether. Kunyunguduka zvakare chiratidzo chakakosha chekushanda kwemethyl cellulose ether. Iyo MC inoshandiswa pa dry powder mortar inofanirwa kunge iri powder, ine mvura shoma, uye kunyunguduka kwayo kunodawo 20%-60% yehukuru hwezvimedu kuti ive pasi pe63um. Kunyunguduka uku kunokanganisa kunyunguduka kwehydroxypropyl methylcellulose ether. Coarse MC inowanzo kuve granular, uye iri nyore kunyunguduka mumvura isina agglomeration, asi chiyero chekunyunguduka chinononoka, saka haina kukodzera kushandiswa mu dry powder mortar. Mudhaka reupfu hwakaoma, MC inoparadzirwa pakati pezvinhu zvekusimbisa zvakaita seaggregate, filler fine nesimende, uye hupfu hwakakwana chete ndihwo hunogona kudzivirira methyl cellulose ether agglomeration kana ichisanganiswa nemvura.
Kazhinji, kana viscosity yakakwira, zvinoita kuti mvura irambe ichichengetwa zvakanaka. Zvisinei, kana viscosity yakakwira uye huremu hweMC hwakakwira, kudzikira kwekunyungudika kwayo kuchaita kuti simba remuto riwedzere uye kugadzirwa kwawo kuwedzere. Kana viscosity yakakwira, zvinoita kuti muto wacho unyatsosimba, asi hazvina kuenzana zvakananga. Kana viscosity yakakwira, ndipo pachava nekusimba kwakanyanya, ndiko kuti, panguva yekuvaka, inoonekwa seinonamatira pa scraper uye ine kunamatira kwakanyanya ku substrate. Asi hazvibatsiri kuwedzera simba remuto wacho. Kureva kuti, panguva yekuvaka, kushanda kwe anti-sag hakusi pachena. Kusiyana neizvi, mamwe ma viscosity epakati nepasi asi akagadziriswa methyl cellulose ethers ane kushanda kwakanaka mukuvandudza simba remuto wacho.
Kuchengetwa kwemvura kweHPMC kune chekuitawo netembiricha inoshandiswa, uye kuchengetwa kwemvura kwemethyl cellulose ether kunoderera nekuwedzera kwetembiricha. Zvisinei, mukushandiswa chaiko kwezvinhu, dry powder mortar inowanzoiswa kune substrates dzinopisa patembiricha dzakakwirira (dzinopfuura madhigirii makumi mana) munzvimbo dzakawanda, dzakadai sekupurasita yekunze kwemadziro putty pasi pezuva muzhizha, izvo zvinowanzo kurumidzisa Kugadziriswa kwesimende uye kuoma kwe dry powder mortar. Kuderera kwehuwandu hwekuchengetedza mvura kunotungamira kune kunzwa kuri pachena kwekuti kushanda uye kuramba kutsemuka zvinokanganiswa, uye zvakanyanya kukosha kuderedza simba rezvinhu zvetembiricha pasi pemamiriro ezvinhu aya. Panyaya iyi, methyl hydroxyethyl cellulose ether additives parizvino inoonekwa seiri pamberi pekuvandudzwa kwetekinoroji. Kunyangwe huwandu hwemethyl hydroxyethyl cellulose hwakawedzerwa (fomula yezhizha), kushanda uye kuramba kutsemuka hazvigone kusangana nezvinodiwa zvekushandisa. Kuburikidza nekurapa kwakakosha paMC, senge kuwedzera mwero we etherification, nezvimwewo, mhedzisiro yekuchengetedza mvura inogona kuchengetedzwa patembiricha yakakwira, kuitira kuti igone kupa mashandiro ari nani mumamiriro ezvinhu akaoma.
Kazhinji, HPMC ine tembiricha yejeli, iyo inogona kukamurwa kuita mhando makumi matanhatu, mhando makumi matanhatu nemashanu, uye mhando makumi manomwe nemashanu. Kune mabhizinesi anoshandisa jecha rerwizi kugadzira dhaka rakasanganiswa, zvakanakisa kushandisa HPMC yemhando makumi manomwe nemashanu ine tembiricha yepamusoro yejeli. Chiyero cheHPMC hachifanirwe kunge chakanyanya kukwira, zvikasadaro chinowedzera kudiwa kwemvura yedhaka, chinonamira patrowel, uye nguva yekuiswa ichave yakareba zvakanyanya, izvo zvinokanganisa kugadzirwa. Zvigadzirwa zvakasiyana zvedhaka zvinoshandisa HPMC ine viscosity yakasiyana, uye hazvishandise HPMC ine viscosity yakawanda zvisina tsarukano. Saka, kunyangwe zvigadzirwa zve hydroxypropyl methylcellulose zvakanaka, zvinorumbidzwa kana zvikashandiswa zvakanaka. Kusarudza HPMC chaiyo ndiro basa guru revashandi verabhoritari vemabhizinesi.
Nguva yekutumira: Kubvumbi-12-2023