Hydroxypropyl methylcellulose (HPMC) yakakosha mvura-inonyungudika polima iyo inoshandiswa zvakanyanya mukuvaka, mishonga, chikafu uye cosmetics maindasitiri, kunyanya mumunda wekunamatira. Iyo viscosity control yeHPMC yakakosha pakuita kwechigadzirwa. zvakakosha. Kuvandudza viscosity yeHPMC mune zvinonamira zvinogona kuwanikwa nekugadzirisa iyo yemuviri uye makemikari zvimiro, pamwe nekugadzirisa iyo kuumbwa uye nharaunda yekushandisa.
1. Gadzirisa huremu hwema molecular eHPMC
Iyo viscosity yeHPMC inonyanya kuenderana neiyo molecular uremu. Kazhinji kutaura, kukura kwehuremu hwema molecular, ndiko kuwedzera kwe viscosity. Nekusarudza HPMC ine uremu hwakakodzera hwemamorekuru, iyo viscosity yekunamatira inogona kunyatso kudzora. Kazhinji, HPMC ine huremu hwepamusoro huremu huchawedzera viscosity yekunamatira, asi ichakanganisawo kuyerera uye kushanda. Naizvozvo, chiyero pakati pe viscosity uye operability chinoda kuwanikwa mumashandisirwo anoshanda.
2. Kudzora dhigirii yekutsiviwa kweHPMC
HPMC chigadzirwa chinowanikwa kubva kumethylcellulose kuburikidza nechikamu chehydroxypropylation reaction. Dhigirii rayo rekutsiva (kureva kuti, dhigirii rekutsiva hydroxypropyl uye methyl mapoka) ine mhedzisiro yakakura pane viscosity. Madhigirii epamusoro ekutsiva anowanzo deredza viscosity yeHPMC, nepo yakaderera madhigirii ekutsiva anowedzera viscosity. Naizvozvo, nekugadzirisa dhigirii rekutsiva HPMC, kutonga kunoshanda kweviscosity kunogona kuwanikwa. Mumamiriro akasiyana ekushandisa, HPMC ine madhigirii akasiyana ekutsiva inogona kudiwa kuti isangane nekuita zvinodiwa zvekunamatira.
3. Kudzora kwekushisa kwekuparara
Iyo solubility uye viscosity yeHPMC inowirirana zvakanyanya nekushisa. Kazhinji kutaura, HPMC ine viscosity yakakwirira kana yakanyungudutswa pakudzika kwakadzika. Nekugadzirisa kupisa kwekushisa kweHPMC panguva yekugadzirira kwekunamatira, viscosity yechigadzirwa chekupedzisira inogona kugadziriswa. Semuenzaniso, kunyungudutsa HPMC pane tembiricha yepamusoro kunogona kukonzera kuderera kwekutanga viscosity, asi zvishoma nezvishoma kuwedzera viscosity sezvo tembiricha inodzikira. Naizvozvo, nekudzora tembiricha panguva yekuvaka, kugadziridzwa kwakasimba kwe viscosity kunogona kuwanikwa.
4. Wedzera thickener
Mune iyo HPMC yekunamatira formula, kuwedzera huwandu hwakakodzera hwehupfu hunogona kunyatso kuwedzera viscosity. Kazhinji thickeners zvinosanganisira xanthan chingamu, carbomer, cellulose derivatives, etc. Izvi thickeners kushanda synergistically ne HPMC kukwidziridza viscosity yose yekunamira. Pamusoro pezvo, makobvu anogona zvakare kuvandudza kugadzikana uye sag kuramba kweadhesive, ichipa zvirinani kushanda mukushandisa.
5. Rongedza kugadziriswa kwekugadzirisa kweHPMC
Iko kusungirirwa kweHPMC mhinduro mumvura ine mhedzisiro yakananga pane viscosity. Iyo yakakwirira yekuisa pfungwa, iyo yakakura viscosity. Mumashandisirwo anoshanda, iyo viscosity yekunamatira inogona kuchinjika kugadziridzwa nekudzora iyo mhinduro kusungwa kweHPMC. Semuenzaniso, kana uchigadzira adhesive, iyo viscosity inogona kuwedzerwa zvishoma nezvishoma kuwedzera huwandu hweHPMC, kana viscosity inogona kuderedzwa nekudonha.
6. Recipe optimization
Iyo viscosity yeHPMC adhesive haingotsamiri pane hunhu hweHPMC pachayo, asi zvakare inowirirana zvakanyanya neiyo yese yekugadzira system. Nekugadzirisa mhando uye chiyero chezvimwe zvikamu mufomula, senge mazadza, co-solvents, stabilizers, nezvimwe, iyo viscosity inogona kunyatsogadziriswa. Semuenzaniso, kuwedzera huwandu hwekuzadza nenzira kwayo kunogona kuwedzera viscosity, asi yakawandisa yekuzadza inogona kuita kuti kunamira kuve nekushomeka kwemvura uye kuita kuti zviome kuisa. Naizvozvo, inonzwisisika formula dhizaini ndiyo kiyi yekuvandudza viscosity yeHPMC.
7. Kugadziriswa kwepH kukosha
Iyo viscosity yeHPMC inobatwawo neiyo pH yemhinduro. Mukati meimwe renji, viscosity yeHPMC inoshanduka ine pH kukosha. Kazhinji, HPMC inoratidzira yakakwira viscosity mukusarerekera kune isina kusimba alkaline nharaunda, nepo pasi peyakasimba acidic kana alkaline mamiriro, viscosity inogona kuderera zvakanyanya. Naizvozvo, nekugadzirisa iyo pH yekunamatira, kutonga kweiyo viscosity kunogona kuwanikwa. Semuenzaniso, mune mamwe maapplication, iyo pH inogona kudzikamiswa nekuwedzera mabuffers kuchengetedza yakagadzikana viscosity.
8. Shandisai-cross-linking agents
Mune zvimwe zviitiko, kuwedzerwa kwe-cross-linking agents kunogona kuwedzera zvakanyanya viscosity yeHPMC. Cross-linking agents anogona kuumba emuviri kana kemikari muchinjiko-mano pakati peHPMC mamorekuru uye kuwedzera kudyidzana pakati pemacheni, nekudaro kuwedzera viscosity. Semuyenzaniso, mukuvaka adhesives, kuchinjika-kubatanidza kweHPMC kunogona kupesvedzerwa nekuwedzera yakaringana yeboric acid kana mamwe akawanda maion ions kuti awane yakakwirira-viscosity adhesive system.
9. Tembiricha uye Humidity Control
Mumashandisirwo anoshanda, iyo viscosity yeHPMC yekunamatira inokanganiswawo neambient tembiricha uye humidity. Kuwedzera tembiricha kazhinji kunoderedza viscosity yeHPMC, nepo kuwedzera humidity kunogona kukonzera viscosity kuchinja mune inonamatira. Naizvozvo, kuchengetedza yakakodzera tembiricha uye hunyoro mamiriro panzvimbo yekuvaka inogona kubatsira kuchengetedza yakanakira viscosity yeHPMC adhesive.
10. Kugadziridzwa kwemamiriro ekuchengetedza
Mamiriro ekuchengetedza eHPMC adhesives ane mhedzisiro yenguva refu pane viscosity. Kuti uchengetedze kugadzikana kwe viscosity, zvinonamatira zvinofanira kuchengetwa munzvimbo yakaoma, inotonhorera, kudzivisa kupisa kwepamusoro uye hunyoro hwepamusoro. Mukuwedzera, nguva yakareba yekuchengetedza inogona kukonzera kuderera kwe viscosity. Naizvozvo, kugara uchitarisa viscosity yekunamatira uye kugadzirisa sezvinodiwa zvakare akakosha matanho ekuona kunaka kwekunamatira.
Nguva yekutumira: Sep-03-2024