HPMC yeKuvaka mbishi zvinhu

Hydroxypropyl methyl cellulose (HPMC) ndeyekugadzira, inonyungudika nemvura polymer iyo inowanzoshandiswa sechinhu chinowedzera muindasitiri yekuvaka. Izvi zvinhu zvakasiyana-siyana zvinowedzerwa kune akasiyana ezvigadzirwa zvekuvaka kuti zviwedzere zvivakwa zvavo, sekuwedzera viscosity, kuvandudza kushanda, uye kupa chinodzivirira kubva mukunyorova.

HPMC inotorwa kubva ku cellulose, inova yakasikwa polymer iyo yakawanda muumambo hwechirimwa. Kugadzira HPMC, cellulose inogadziriswa kemikari kuti iwedzere kunyungudika kwemvura, ichibvumira kuti ishandiswe mumhando dzakasiyana dzekushandisa. Maitiro ekugadzirisa makemikari anosanganisira kutsiva mamwe emapoka ehydroxyl mu cellulose nemapoka ehydroxypropyl. Chigadzirwa chinoguma chichena, kusununguka-kuyerera poda inonyunguduka nyore mumvura, ichiita sarudzo yakajeka, inopenya.

Imwe yemashandisirwo ekutanga eHPMC muindasitiri yekuvaka ndeye thickener uye rheology modifier. Kana yakawedzerwa kune zvigadzirwa zvekuvaka, inowedzera viscosity yechigadzirwa, zvichiita kuti zvive nyore kuisa uye kuchipa kuwirirana kunoenderana. Semuyenzaniso, HPMC inowanzowedzerwa kune mataira anonamira kuti avandudze kushanda kwawo uye kupararira. Izvi zvinobvumira kuti tile yekunamatira ishandiswe zvakaenzana kune substrate, kuve nechokwadi chisungo chakasimba uye chakasimba.

HPMC inopawo chidziviriro chekudzivirira kubva mukunyorova. Kana yawedzerwa kune zvigadzirwa zvekuvaka sedhaka, HPMC inobatsira kudzikisa huwandu hwemvura inotorwa nechigadzirwa, ichidzivirira kubva pakuoma nekukurumidza. Izvi zvinobvumira chigadzirwa kuti chishandiswe kwenguva yakareba, kuvandudza kukurumidza uye kushanda kwezvirongwa zvekuvaka. Pamusoro pezvo, chipingamupinyi chinodzivirira chakapihwa neHPMC chinobatsirawo kudzivirira efflorescence (kuvakwa kwemunyu pamusoro pemasonry), izvo zvinogona kukanganisa kutaridzika kwechigadzirwa chakapedzwa.

Kumwe kushandiswa kwakakosha kweHPMC muindasitiri yekuvaka yakaita sebhainda. Kana yawedzerwa kune zvigadzirwa zvekuvaka, HPMC inobatsira kusunga zvimwe zvikamu pamwechete, kuvandudza simba rose uye kusimba kwechigadzirwa. Semuyenzaniso, HPMC inowanzowedzerwa kune gypsum-based zvigadzirwa senge drywall joint compounds uye plasters, kubatsira kuvandudza kunamatira kwavo kune substrate.

Pamusoro pekushandiswa kwayo mukuvaka, HPMC inoshandiswawo mune dzakasiyana siyana mamwe maindasitiri, anosanganisira chikafu, mishonga, uye cosmetic maindasitiri. Semuyenzaniso, HPMC inowanzoshandiswa seyakakora uye inodzikamisa muzvigadzirwa zvechikafu, uye sechinhu chinosungira mukugadzira mapiritsi muindasitiri yemishonga.

Kune akati wandei mamakisi eHPMC anowanikwa, imwe neimwe iine akasiyana zvivakwa zvinoita kuti ive yakakodzera kune akasiyana maapplication. Iwo magiredhi akajairika eHPMC akaderera, epakati, uye akakwira viscosity, ayo anotsanangurwa nehuremu hwemamorekuru epolymer. Low viscosity HPMC inowanzo shandiswa mumashandisirwo anoda yakaderera viscosity mhinduro, senge mukugadzira yakaderera-viscosity adhesives. Medium viscosity HPMC inowanzo shandiswa mumashandisirwo anoda zvine mwero viscosity mhinduro, senge mukugadzira mataira anonamira. High viscosity HPMC inowanzo shandiswa mumashandisirwo anoda yakakwira viscosity mhinduro, senge mukugadzira zvigadzirwa zvakakora uye zvine cream, senge shampoos uye lotions.

Mukupedzisa, HPMC chinhu chakakosha chekuvaka chine huwandu hwakasiyana hwekushandisa muindasitiri yekuvaka. Kubva pakukora uye rheology gadziriso, kusvika pakudzivirira hunyoro uye kusunga, HPMC chinhu chakakosha chekuwedzera chinosimudzira zvivakwa zvezvigadzirwa zvekuvaka uye inovandudza kushanda kwezvirongwa zvekuvaka.