Hom thiab cov ntawv thov ntawm cov xim tuab ntawm cov xim pleev xim rau hauv cov dej

1. Inorganic thickener

Inoracicic thickeners yog hom minerals gel uas tuaj yeem nqus dej thiab ua haujlwm hauv dej, tab sis kuj tseem ua rau cov kab mob hauv qab, tab sis kuj muaj cov xim ua kom dej, tab sis kuj muaj cov dej khov, tab sis kuj muaj cov khoom siv dej hauv dej, tab sis kuj muaj cov khoom noj haus tsis zoo thiab ua kom cov khoom tsis zoo. Nws feem ntau yog siv ua ke nrog cellulose ether lossis rau primers thiab xim. Siab xim.

2. Cellulose thalener

Cellulosic thickeners yog qhov tseem ceeb tshaj plaws ntawm kev thov thiab cov ntaub ntawv hydroxyethyl cellulose nws yog qhov ntau tshaj plaws siv thiab yog ib zaug lub ntsiab ntawm cov thickeners.

Piv nrog rau lwm cov thickeners, cellulose thickeners muaj qhov zoo ntawm cov tshuab ua kom zoo, muaj kev sib zog heev nrog rau cov hom phiaj, thiab tsis muaj qhov cuam tshuam ntawm cov nplaum. Qhov zoo, tab sis kev siv cov cellulose thickeners kuj muaj qhov tsis xws luag, feem ntau yog nyob rau hauv cov hauv qab no.

A. Kev ua tau zoo los tshuaj pwm tsis zoo. Lub cellulose thalulose yog lub ntuj polymer compound, uas yog qhov yooj yim rau pwm nres, ua rau muaj kev txo qis hauv viscosity. Nws tau nruj yuav tsum tau ua rau ntawm kev tsim khoom thiab chaw cia khoom.

B. Leveling, nyob rau hauv qhov kev txiav txim ntawm shear kev nyuaj siab, txheej hydration nruab nrab ntawm cov tuab thiab dej yog pov tseg nrog cellulose, uas yog qhov yooj yim los tsim. Tom qab txheej txheej ua tiav, kev puas tsuaj ntawm cov kas fes txheej nres tam sim ntawd, thiab cov xim tsis muaj qib sai thiab cov xim tsis txaus siab, ua rau cov ntoo txhuam lossis cov cim nplaum.

C. Muab cov khoom siv. Thaum lub sij hawm hear-ceev cov txheej kev tsim kho, cov xim xim me me yog feem ntau tsim ntawm kev tawm ntawm cov menyuam thiab lub substrate, uas yog hu ua atomization; Thaum lub sijhawm phau ntawv nyeem cov txheej txheem ceev-ceev cov me me, nws yog hu ua kev sib cais.

D. Cellulose Celleners yog qhov yuav ua rau flocculation thiab theem sib cais ntawm cov kua yas, cuam tshuam rau cov txheej ruaj khov, thiab ua rau cov nplaum.

3. Polyacrylate thickener

Polyacrylate thickeners tuaj yeem faib ua ob hom: ib qho yog dej-soluble polyacrylate; Lwm tus yog homopolymer lossis copolymer emulsion thickener ntawm acrylic acid thiab methalicic acid.

Qhov no thickener nws tus kheej yog acidic thiab yuav tsum tau neutralized nrog alkali lossis ammonia dej rau tus lej pH tus nqi ntawm 8-9 los ua cov nyhuv tuab. Nws tseem hu ua cov acrylic acid alkali o boilener.

Lawv tsuas yog cia siab rau lub electrostatic repulsion ntawm carboxylate i 50 thim rov qab ua rau cov molecular charts stretch rau hauv cov pas nrig thiab thicken, thiab cov pH siab dua 7.5.

Acrylic thickener yog anionic, thiab nws cov dej tsis kam thiab alkali tsis yog neeg pluag. Piv nrog cellulosic thickeners, nws muaj cov cuab yeej zoo txheej thiab los tiv thaiv kev txaws, thiab muaj cov teeb meem me me rau ntawm cov ci, yog li nws tuaj yeem siv rau hauv cov txheej ci ci.

4. Polyurethane Thickener

Piv nrog cov selorementioned cellule cellulers thickenters thiab acrylic thickeners, polyurethane thickeners muaj cov txiaj ntsig hauv qab no:

A. Ob qho tib si nkaum lub zog thiab qib zoo.

B. Tsawg dua molecular hnyav, tsis yooj yim los tsim cov txaws thaum cov menyuam txheej.

C. Nws muaj peev xwm koom nrog cov nplais ntawm cov nplais uas tsis muaj cov tshuaj flocculation, yog li nws tuaj yeem ua rau txheej duab txheej muaj qhov zoo dua;

D. Zoo hydrophobicity, txhuam tsis kam, khawb tiv taus thiab muaj kev ruaj khov.

Polyurethane thickeners muaj ntau rhiab rau cov mis muaj pes tsawg leeg, thiab lawv cov kev yoog raws tsis zoo raws li cov cellule thickeners. Qhov cuam tshuam ntawm ntau yam yog tsim nyog tau txiav txim siab thaum siv lawv.

Muaj ntau yam thickeners. Thaum xaiv siv lawv, cov tuab tuab thiab cuam tshuam ntawm kev ntseeg yuav tsum tau raug txiav txim siab ua ntej, thiab kev ua yeeb yam ntawm txheej ua yeeb yaj kiab thiab kev ruaj ntseg yuav tsum tau txiav txim siab thib ob.