Hom thickener twg siv rau hauv xim?

Cov khoom ua kom tuab uas siv rau hauv cov xim feem ntau yog cov khoom uas ua rau cov xim viscosity lossis tuab dua yam tsis cuam tshuam rau nws lwm yam khoom xws li xim lossis lub sijhawm ziab. Ib qho ntawm cov khoom ua kom tuab uas siv ntau tshaj plaws hauv cov xim yog cov khoom hloov pauv rheology. Cov khoom hloov pauv no ua haujlwm los ntawm kev hloov pauv tus cwj pwm ntws ntawm cov xim, ua rau nws tuab dua thiab ruaj khov dua.

Muaj ntau hom rheology modifiers siv rau hauv cov xim pleev xim, txhua tus muaj nws cov yam ntxwv thiab qhov zoo tshwj xeeb. Qee cov rheology modifiers feem ntau siv suav nrog:

Cov khoom siv cellulose:
Hydroxyethyl cellulose (HEC)
Hydroxypropyl cellulose (HPC)
Methyl cellulose (MC)
Ethyl hydroxyethyl cellulose (EHEC)
Cov Khoom Siv Ua Kom Thickeners Sib Koom Tes:
Hydrophobically hloov kho ethoxylated urethane (HEUR)
Hydrophobically hloov kho alkali-soluble emulsion (HASE)
Hydrophobically hloov kho hydroxyethyl cellulose (HMHEC)
Cov Khoom Siv Polyacrylic Acid:
Carbomer
Cov tshuaj copolymer acrylic acid
Bentonite Av nplaum:
Av nplaum Bentonite yog ib yam khoom ua kom tuab uas ntuj tsim los ntawm cov tshauv roob hluav taws. Nws ua haujlwm los ntawm kev tsim ib lub network ntawm cov khoom me me uas ntes cov dej molecules, yog li ua rau cov xim tuab.
Silica Gel:
Silica gel yog ib yam khoom siv ua kom tuab uas ua haujlwm los ntawm kev nqus thiab ntes cov kua dej hauv nws cov qauv porous, yog li ua rau cov xim tuab.
Cov Khoom Siv Polyurethane Thickeners:
Cov tshuaj polyurethane thickeners yog cov polymers hluavtaws uas tuaj yeem tsim kho kom muab cov khoom rheological tshwj xeeb rau cov xim.
Xanthan Gum:
Xanthan gum yog ib yam khoom ua kom tuab uas ntuj tsim los ntawm kev ua kom cov suab thaj sib xyaw ua ke. Thaum sib xyaw nrog dej, nws ua rau nws zoo li gel, ua rau nws tsim nyog rau kev ua kom xim tuab.
Cov tshuaj hloov kho rheology no feem ntau yog ntxiv rau hauv cov xim pleev thaum lub sijhawm tsim khoom kom tau raws li qhov xav tau viscosity thiab cov yam ntxwv ntws. Kev xaiv cov thickener nyob ntawm ntau yam xws li hom xim pleev (piv txwv li, dej-based lossis solvent-based), viscosity xav tau, txoj kev siv, thiab kev xav txog ib puag ncig.

Ntxiv rau qhov ua kom cov xim tuab, cov tshuaj hloov pauv rheology kuj tseem ua lub luag haujlwm tseem ceeb hauv kev tiv thaiv kev sagging, txhim kho kev txhuam, txhim kho kev sib npaug, thiab tswj kev spattering thaum siv. Kev xaiv cov thickener yog qhov tseem ceeb hauv kev txiav txim siab txog kev ua tau zoo thiab cov yam ntxwv ntawm kev siv cov xim.