HPMC (HydroxyPropyl methylcellose) inoshanda zvakanyanya uye inoshandiswa zvakanyanya mukuumbwa kwejasi uye pendi. Imwe yemabasa ayo makuru ndeyekuwedzera kusimudzira kwekusimudzira, izvo zvisingavhesi renhengo yemachira uye pendi, asi zvakare inovandudza maitiro ekuvaka uye maitiro ekupedzisira emufirimu.
1. Basic Properties yeHPMC
HPMC is non-ionic cellulose ether neakanaka mvura solubility uye organic solvent salubility. Inogona kunyungudika uye kuumba iyo yakagadzikana cooludal solution pane dzakasiyana tembiricha uye phengo yePH. Iyo nzira huru yekuita yeHPMC ndeyekugadzira setiweki chimiro kuburikidza neyekufambiswa kwehydrogen zvisungo uye van der masimba emauto, nekudaro anokanganisa zvivakwa zvejasi kana pendi. Yayo viscosity inochinja neshanduko mukushanduka, tembiricha, shear rate uye zvimwe zvinhu, izvo zvinoita kuti ishandiswe mumakotari uye pendi ine nzvimbo yakakura yekugadzirisa.
2. Basa reHPMC mumakonzo uye pendi
Viscossity gadziridzo: Basa guru reHPMC ndeyekugadzirisa zvevisa zvehurongwa. Mune majasi uye pendi, viscosity i paramende yakakosha iyo inokanganisa zvakananga kuvakwa, kuyambuka, uye yekupedzisira yefirimu yemhedzisiro yezvinyorwa. HPMC inogona kunyatsogadzirisa zvisizvo zvekuvhara nekuchinja ma molecular chimiro kana chivimbo, chengetedza kugadzikana uye kuwanda kwekuchengetera panguva yekuchengetedza, kufambisa uye kuvaka.
Rheological kutonga: HPMC inopa kuunganidza kana kupenda zvakanaka zvivakwa, zvekuti inomira manhamba ekudzivirira zvakanyanya kana kufambisa manhamba, uye kunogona kuderedza visikoka pasi pekuveura, zvichiita kuti zvive nyore kushandisa. Iyi thiskotropy yakakosha pakuvaka mashandiro emakotoni uye pendi, kunyanya kana ichipuruzira, ichirova, iyo inobatsira, iyo inobatsira yunifomu uye inotyisa kuwanda.
ANOGADZIRA-SEGGINE PERTE: Kana majasi kana pendi anowanzoiswa pane zvimedu zvemukati, zvichaitika zvinowanzoitika, ndiko kuti, iyo yekubatanidza inoyerera ichirwadza, inokonzerwa neyakagadziriswa firimu uye kunyange mafambiro akayerera. HPMC inobudirira inodzvinyirira iyo sagging phenomenon nekuvandudza iyo viscosity uye iyo thixotropy yehurongwa, ichiratidza kugadzikana kwekutarisa kana yaiswa panzvimbo dzevatambi.
Anti-Sedimentation Mhedzisiro: Mune Zvikanganiso Zvakawanda NEMAHARA kana mafirita, pigment kana mafirita anowanzoita kuti azive, achikanganisa kufanana kwekutakura. HPMC inoderedza mwero wekusimbisa masisitimu akasimba nekuwedzera iyo viscosity yehurongwa. Panguva imwecheteyo, inochengetedza mamiriro ayo ekumiswa pendi nekudyidzana neiyo pigment zvimedu, ichisimbisa kuti pendi yunifomu uye inowirirana panguva yekuvaka.
Kuvandudza Kuchengetedzeka Kugadzikana: Munguva yekuchengetedza kwenguva refu, iyo pendi inowanzo kuoma, coagulation kana kuti sendimentation. Kuwedzerwa kweHPMC kunogona kugadzirisa zvinobudirira kugadzikana kwekuchengetera pendi, chengetedza kufanana uye viscosity yependi, nekukasira hupenyu hwaro hweshari uye nekudzivisa kugadzirwa kwechigadzirwa zvekushambadzira kwakakonzerwa nekuchengetedza zvisina kunaka.
3. Zvinhu zvinokanganisa viscosity kudzora neHPMC
Kusimbisa: Iko kusunganidzwa kweHPMC chinhu chakananga chinokanganisa zvevasokisi pendi kana pendi. Sezvo kusangana kweHPMC kunowedzera, visikopa yehurongwa kuchawedzera zvakanyanya. Zvekuunganidzwa izvo zvinoda kukwikwidzana kwepamusoro, zvakakodzera kuwedzera huwandu hweHPMC inogona kuwana iyo yakakodzera viscosity level. Nekudaro, zvakanyanyisa kusungirirwa kunogona kukonzerawo hurongwa kuve hukuru hwekuvhara uye kukanganisa maitiro ekuvaka. Naizvozvo, zvakafanira kudzora zvakaringana huwandu hweHPMC yakawedzerwa zvichienderana nezvinodiwa zvekushandisa uye zvekuvaka.
Molecular uremu: uremu hwehurume hweHPMC zvakare chinhu chakakosha chinokanganisa viscosity. HPMC ine yakakwira molecular uremu inoumba denser network chimiro mumhinduro, iyo inogona kuwedzera zvakanyanya zvidzidziso zvekuvhara; Ipo HPMC ine yakaderera molecular uremu inoratidzira kuderedza kuderera viscosity. Nekusarudza HPMC ine zviyero zvakasiyana-nyoro, iyo viscosity yekuvhara kana pendi inogona kugadziriswa kuti isangane nezvinodiwa zvekuvaka zvakasiyana.
Tembiricha: iyo viscosity yeHPMC inoderera nekuwedzera kupisa. Naizvozvo, kana uchigadzira mune yakanyanya tembiricha yemamiriro ekunze, inodikanwa kuti isarudze mhando dzisiri dzimba dzekudziya dzisingaperi kana zvakakodzera kuti usaite shuwa hwekuita basa rekuvaka uye kuunganidzwa kwemamiriro ekunze ekunze.
PH Kukosha: HPMC yakagadzikana mune yakawandisa pH Range, asi yakanyanyisa acid uye Alkali mamiriro achabata kugadzikana kwayo viscosity. Mune yakasimba acid kana alkali nharaunda, HPMC inogona kushatisa kana kutadza, zvichikonzera kuderera kweyisikoka. Naizvozvo, paunenge uchigadzira formula, ita shuwa kuti iyo pH Kukosha kwehurongwa kune mwero kuchengetedza iyo viscosity kudzora kweHPMC.
Shear Rate: HPMC ndeyekutsvaira-inotyisa, ndiko kuti, visikopa yayo ichave yakaderedzwa zvakanyanya pamitengo yakakwira. Ichi chivakwa chakakosha mukugadzira maitiro ekuvaka, nekuti kana kugeza, kuhukura kana kupfira, kuunganidza kune simba rakakura reShear Mushure mekunge kuvakwa kwapera, Simba reShear rinonyangarika, uye Hpmc rinogona kudzoreredza zvevhiza yekuvhara kuti vave nechokwadi chekufanana uye kukora kwefirimu rekubatanidza.
4. Kushandiswa kweHPMC mune dzakasiyana kuunganidza masisitimu
Zvinyorwa-zvakavakirwa mvura: HPMC inoshandiswa zvakanyanya mumvura-yakavakirwa mvura. Izvo hazvigone kungoshandiswa chete seanotenderera, asi zvakare seyakagadzirwa firimu rubatsiro uye stabilizer. Mune masisitimu emvura, HPMC inogona kubatsira zvinobudirira kuwanda kweiyo yekuvhara, kuvandudza rheology uye kuwanda, uye kudzivirira sagging. Panguva imwecheteyo, zvinogona zvakare kuvandudza kudzikisira kwemvura uye kupatsanura kwemvura uye kupokana nefirimu rekuvandudza uye kuwedzera hupenyu hwebasa rekubatanidza.
Solvent-based Coatings: Kunyangwe HPMC ichishandiswa zvishoma mune solvent-based to solvent-based tower Kunyanya muWall Olatle Orgpound Commund (Voc) Coatings, HPMC inogona kupa iyo inodiwa viscosity control uye rheology yekugadzirisa, nekudaro ichidzora kushandiswa kwemasimba uye kusanganisa zvinodiwa zvedziviriro zvemunharaunda.
Cowder Coatings: Mune HPMC inogona kushandiswa seyekubhuroka uye thickener yekuvandudza iyo fluidity uye firimu-inogadzira nzvimbo nekuwedzera zvivakwa zveupfu. HPMC inogona kuve nechokwadi chekuti iyo hupfu inokwereta haisi nyore kubhururuka panguva yekuvaka maitiro, apo ichivandudza kufanana uye kusimba kwefirimu rekuvhara.
HPMC inowana yakanakisa viscosity control mumakonzo uye pendi kuburikidza nezvayo yakasarudzika yemuviri uye yemakemikari zvivakwa. Hazvigone kungogadzirisa zvakanyatsonongedza iyo system, asi zvakare kuvandudza renhere yekuvhara, simbisa iyo yekunyepedzera uye inogadzirisa zvinhu, uye kuvandudza kugadzikana kwekuchengetedza. Zvinoenderana neyakasiyana yekubatanidza masisitimu uye nekuchinja kwazvinoita, nekugadzirisa huremu, turembe, tembiricha uye zvimwe zvinhu zvinogona kudzorwa zvakanaka, nekuvandudza kuvakwa kwekuvhara uye nemhando yekupedzisira yekubatanidza.
Nguva Yokutumira: Sep-13-2024