Hydroxypropyl methylcellulose (HPMC, Hydroxypropyl Methylcellulose) inhengo yepolymer inowanzoshandiswa mukunamira, zvekuvaka uye kugadzirira kwemishonga. Nekuda kwechimiro chayo chakasiyana chemakemikari uye zvivakwa, HPMC iri kuwedzera kushandiswa mukunamira, kunyanya mukuvandudza kusimba kwechisungo.
Kemikari zvivakwa uye chimiro cheHPMC
HPMC inobva ku cellulose, inoumbwa nekutsiva mapoka ehydroxyl pamorekuru we cellulose ne methoxy (-OCH3) uye hydroxypropoxy (-OCH2CH(OH)CH3) mapoka. Iyo yakasarudzika chimiro cheHPMC chinoipa akasiyana emhando yepamusoro zvivakwa, senge kunyungudika kwemvura, kupisa kwemafuta, kugadzira firimu uye kukora zvivakwa. Izvi zvivakwa zvinoisa hwaro hwekushandiswa kwayo mune zvinonamira, kunyanya mukuvaka nemaindasitiri ekunamira.
Iyo nzira yekuita kweHPMC mune zvinonamatira
Kukora mhedzisiro HPMC ine yakanakisa thickening mhedzisiro uye inogona kuwedzera zvakanyanya viscosity yeanonamatira. Mune anonamira maumbirwo, HPMC inoita seyakakora, inovandudza rheological zvimiro zveanonamira nekugadzira network yemamorekuru echeni muchikamu chemvura. Uku kukora kunobatsira kunamira kugovera zvakaenzana panguva yekushandisa, kuwedzera nzvimbo yekubatana pakati pezvinhu uye nekudaro kuvandudza simba rebhondi.
Kuchengeta Mvura HPMC ine yakanakisa kuchengetedza mvura, kunyanya muzvinhu zvekuvaka senge simende-based adhesives, kuchengetedza hunyoro panguva yekurapa. Iyi ficha inovimbisa kurapa kwakafanana kweanonamira uye inodzivirira kusaenzana kusungirirwa kana kurasikirwa kwesimba nekuda kwekukurumidza kurasikirwa nehunyoro. Uye zvakare, iyo inochengetedza mvura yeHPMC inowedzera nguva yakavhurika yekunamatira, zvichiita kuti mabasa ekuvaka awedzere kuchinjika uye nekudaro kuvandudza yekupedzisira yekubatanidza mhedzisiro.
Mafirimu-ekugadzira zvimiro Iyo firimu-inogadzira zvimiro zveHPMC zvakare chimwe chezvikonzero zvakakosha zvekuvandudza simba rekubatanidza. HPMC inogona kuumba firimu rakasviba pamusoro pezvinhu, izvo zvisingangogadziri maitiro emagetsi ekunamatira, asiwo inopa kudzivirira kwemvura uye kupikisa kwemakemikari. Mune mamwe maapplication akakosha, akadai sehuni bonding kana bepa chigadzirwa gluing, inodzivirira firimu layer yakaumbwa neHPMC inogona kubatsira kuvandudza simba rebhondi uye kuwedzera hupenyu hwechisungo.
Interfacially yakagadziridzwa HPMC inogona zvakare kuvandudza kuenderana kwemukati pakati pekunamira uye substrate. Nekuda kweiyo polar molecular chimiro cheHPMC, inogona kugadzira akasimba emuviri kana makemikari masimba ane huso hwezvinhu zvakasiyana-siyana, kunyanya pamasubstrates ane polarity yepamusoro (senge girazi, ceramics, simbi, nezvimwewo), HPMC inogona kunyatso kuvandudza Adhesion pakati pekunamatira. uye substrate. Iyi interface shanduko yakakosha mukuvandudza simba rebhondi.
Kushandiswa kweHPMC mune akasiyana adhesive masisitimu
Mvura-Yakavakirwa Pakunamatira Mumvura-inonamatira, HPMC inoita basa rakakosha seyakakora uye inochengetedza mvura. Chinhu chikuru chemvura-based adhesives imvura. Iyo inochengetedza mvura zvinhu zveHPMC inogona kubatsira mushonga wekunamira zvirinani pamusoro peiyo substrate uye kuwedzera simba rekubatanidza. Uye zvakare, iyo firimu-inogadzira zvimiro zveHPMC inobatsirawo mukusimba kwemvura-inonamatira inonamatira.
Cement-based adhesive HPMC inoshandiswa zvakanyanya mumasendi-based adhesives sematairi anonamira uye madziro plastering zvinhu. Cement-based adhesives inoda kuchengetedza humwe hunyoro panguva yekurapa, uye yakanakisa kuchengetedza mvura kweHPMC inovimbisa kufanana kwesementi panguva yekurapa uye inodzivirira kuputika kana kusakwana kwesimba kunokonzerwa nekukurumidza kubuda kwemvura. Uye zvakare, HPMC inokwidziridza kuita kwekuvaka kweanonamira, ichiita kuti kuvaka kuve nyore uye kwakatsetseka, uye kuwedzera kuvandudza simba rekubatanidza.
Latex pendi uye mamwe mapendi ekuvaka Mu latex pendi uye mamwe machira ekuvaka, HPMC inoshandiswa seyakakora uye yakagadzika kuvandudza kufananidzwa uye adhesion zvimiro zvejasi, kuve nechokwadi chekuti kupfekedza kunogona kunamatira zviri nani pamusoro peiyo substrate, nekudaro Inovandudza pendi. kusimba uye kudzivirira mvura. Ichi chivakwa chakakosha kumhando uye chisungo chesimba rezvivakwa zvekuvaka.
Zvinhu zvinokanganisa HPMC kuita
Dhigirii reKutsiva Iyo dhigirii yekutsiva yeHPMC (kureva, chikamu chemethoxy uye hydroxypropoxy mapoka anotsiviwa mumorekuru) inokanganisa zvakananga kushanda kwayo mumanamira. Kazhinji kutaura, iyo yakakwirira dhigirii yekutsiva, zviri nani kuchengetedza mvura uye firimu-kugadzira zvimiro zveHPMC, nekudaro zvichiwedzera kusimba kwechisungo chekunamira. Naizvozvo, zvine musoro kusarudzwa kwedhigirii rekutsiviwa kweHPMC kunogona kukwidziridza kuita kweanonamatira.
Molecular Weight Huremu hweHPMC hune mhedzisiro yakananga pakukora kwayo uye kugadzira firimu. HPMC ine huremu hombe hwemamorekuru ine huremu hwakasimba hwekukora, nepo HPMC ine huremu hudiki hwemamorekuru inonyungudika uye inokodzera kushandiswa mukunamira mafomu ayo anoda kukurumidza kupora. Naizvozvo, kusarudza HPMC ine huremu hwakakodzera hwemamorekuru zvinoenderana nezvinodiwa chaizvo zvekunamira kwakakosha zvikuru kuvandudza simba rekubatanidza.
Environmental Factors HPMC inoratidza zvivakwa zvakasiyana pasi pemamiriro akasiyana ezvakatipoteredza. Semuenzaniso, kukora uye kuchengetedza mvura zvivakwa zveHPMC zvinogona kukanganiswa munzvimbo dzakakwirira kana dzakaderera tembiricha. Naizvozvo, iyo fomula uye huwandu hwekushandisa hweHPMC hunogadziridzwa kune dzakasiyana nharaunda dzekushandisa kuti ive nechokwadi chekuti inonamira inochengetedza yakakwira yekubatanidza simba pasi pemamiriro akasiyana.
HPMC inoita basa rakakosha mukuvandudza simba rekunamatira bond. Kuburikidza nemaitiro ayo akasiyana-siyana akadai sekukora, kuchengetwa kwemvura, kuumbwa kwemafirimu uye kuchinjika kwemukati, HPMC inogona kunyatso kuvandudza mashandiro ezvinonamira, kunyanya mumvura-based adhesives, simende-based adhesives uye mabhanhire ekuvaka. Sezvo tekinoroji yekunamatira ichiramba ichikura, basa reHPMC mukuvandudza simba rebhondi rinowedzera kukosha.
Nguva yekutumira: Sep-09-2024