Hydroxypropylmethylcellulose (HPMC) i cellulose ether inobva muzvinhu zvakasikwa zvakaita sehuni dzakapfava nedonje. Nekuda kwehunhu hwayo hwakasiyana, kusanganisira kunyungudika kwemvura, kugona kwayo kukora, hunhu hwekugadzira firimu, nezvimwewo, inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana. Chimwe chezvinhu zvakakosha zvekufunga nezvazvo pakushandisa HPMC ndiko kusviba kwayo, izvo zvinogona kukanganisa zvikuru mashandiro ayo munzvimbo dzakasiyana dzekushandisa. Muchinyorwa chino, tinokurukura kuti sei cellulose HPMC ine kusviba kwakasiyana ichifanira kusarudzwa munzvimbo dzakasiyana dzekushandisa, uye kuti kusviba kwakakodzera kunogona kubatsira sei kugadzirisa mashandiro eHPMC.
Kusimba kwemvura (viscosity) inzira yekuyera kuramba kwemvura kuyerera uye chinhu chakakosha pakugadzira zvigadzirwa zvinoda hunhu hwakasiyana hwekuyerera kwemvura. Kusimba kwemvura kunokanganisa mashandiro eHPMC nekuti ndiyo inosarudza kugona kwayo kugadzira majeli, zvichikanganisa pH yemushonga, ukobvu hwejira, nezvimwe zvinhu zvemuviri. HPMC inowanikwa mumhando dzakasiyana dze viscosity, mhando dzakajairika dziri low viscosity (LV), medium viscosity (MV) uye high viscosity (HV). Imwe neimwe yemhando idzi ine chinangwa chayo uye yakakodzera nharaunda chaiyo.
Kusviba Kwakaderera (LV) HPMC
HPMC ine huremu hushoma uye inonyungudika nyore nyore mumvura. Ndiyo mhando inonyanya kushandiswa yeHPMC uye inoshandiswa mumaindasitiri akasiyana-siyana anosanganisira chikafu, zvizoro, kuvaka uye mishonga. LV HPMC inonyanya kukodzera kushandiswa kunoda mhinduro dzine hunyoro kusvika pakati nepakati dzakadai semagel akajeka, emulsions uye pendi. LV HPMC inogonawo kushandiswa kuwedzera hupenyu hwechikafu, kuderedza syneresis uye kupa hunyoro hwakatsetseka.
LV HPMC inoshandiswawo kakawanda muindasitiri yekuvaka kuti ivandudze kushanda kwezvinhu zvakagadzirwa nesimende zvakaita semamortar, grouts uye tile glues. Inobatsira kuderedza kurasikirwa nemvura mumusanganiswa wesimende, inodzivirira kutsemuka, uye inosimbisa chisungo pakati pezvinhu. LV HPMC inoshandiswawo kuwedzera simba uye kugara kwenguva refu kweplaster, stucco nezvimwe zvinhu zvine chekuita nazvo.
Kusviba Kwepakati (MV) HPMC
HPMC ine huremu hwepakati nepakati (medium viscosity) ine huremu hwakakura kupfuura LV HPMC uye hainyungudike mumvura. Inowanzo shandiswa muzvishandiso zvinoda mhinduro dzakasimba dzakadai sekuputira, mavarnish neingi. MV HPMC ine hunhu huri nani hwekudzora kuyerera kwemvura uye mashandisirwo ayo kupfuura LV HPMC, zvichiita kuti firimu rive rakafanana uye rakafanana. MV HPMC inogonawo kushandiswa pahuwandu hwakakura hwepH, zvichipa hunyanzvi hwekuwedzera kune zvakasiyana-siyana zvezvishandiso.
MV HPMC inoshandiswawo zvakanyanya mumishonga, senge mapiritsi anodzorwa, sezvo inononoka kunyungudika uye nokudaro inorebesa kuburitswa kwezvinhu zvinoshanda.
Kusviba Kwakanyanya (HV) HPMC
HPMC ine huremu hwakanyanya hwemamorekuru kupfuura ese matatu uye hainyungudike zvakanyanya mumvura. Inowanzo shandiswa mukushandiswa kunoda kuti pepa rive rakakora uye rigare rakagadzikana, senge masosi, makirimu nemajeli. HV HPMC inobatsira kusimudzira magadzirirwo uye kusimba kwezvigadzirwa, zvichipa ruzivo runonakidza rwemushandisi. Inogona zvakare kushandiswa kudzikamisa emulsions, kudzivirira kugadzikana uye kuwedzera nguva yekushanda. Pamusoro pezvo, HV HPMC inowanzoshandiswa muindasitiri yemapepa kuvandudza kusimba kwepepa uye kudhindwa kwaro.
mukupedzisa
Kusimba kwakakodzera kweHPMC kwakakosha kuti ishande zvakanaka munzvimbo dzakasiyana siyana. LV HPMC yakakodzera kushandiswa kunoda mhinduro dze viscosity dzakaderera kusvika pakati nepakati, nepo MV HPMC yakakodzera kushandiswa kwemhinduro dzakakora dzakadai sependi, varnishes ne inki. Chekupedzisira, HV HPMC yakakodzera kushandiswa kunoda kusimba uye kugadzikana senge makirimu, majeli nemasosi. Kusarudza viscosity chaiyo kunogona kubatsira kuvandudza kushanda kweHPMC uye kuita kuti ive yakakodzera kushandiswa kwakasiyana.
Nguva yekutumira: Nyamavhuvhu-31-2023