Ukusebenzisa iphedi yokuthinta

Iqhaza le-HPMC embonini yezingubo zokugqoka

Sithatha ubuqotho futhi siwine njengomgomo wokusebenza, futhi siphatha wonke amabhizinisi ngokulawula nokunakekela okuqinile.

Njengoba izakhiwo ze-hydroxypropyl methylcellulose zifana namanye ama-ethers ancibilikayo emanzini, ingasetshenziswa embotsheni ye-emulsion kanye nezingxenye zokumboza i-resin encibilikayo emanzini njenge-ejenti eyenza ifilimu, i-thickener, i-emulsifier kanye ne-stabilizer, njll., enikeza ifilimu yokuhlanganisa. ukumelana okuhle kwe-abrasion.Ukunamathiswa okulinganayo nokunamathela, kanye nokungezwani kwendawo okuthuthukisiwe, ukuzinza kuma-asidi nezisekelo, nokuhambisana nombala wensimbi.

Njengoba i-HPMC inephuzu lejeli eliphakeme kune-MC, iphinde imelane kakhulu nokuhlasela kwebhaktheriya kunamanye ama-cellulose ether, futhi ngaleyo ndlela ingasetshenziswa njenge-ejenti ejiyayo yokumboza i-emulsion enamanzi.I-HPMC inokuqina okuhle kwesitoreji se-viscosity kanye nokuhlakazeka kwayo okuhle kakhulu, ngakho-ke i-HPMC ifaneleka ngokukhethekile njenge-dispersant kuma-emulsion coatings.

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Ukusetshenziswa kwe-hydroxypropyl methyl cellulose embonini yokugqoka imi kanje.

I-1.i-viscosity ehlukahlukene ye-HPMC yokucushwa kwepeyinti ukumelana nokugqoka, ukumelana nokushisa okuphezulu, incazelo ephikisana namagciwane, ukumelana nokugeza nokuzinza kuma-acids nezisekelo kungcono;ingasetshenziswa futhi njenge-stripper kapende equkethe i-methanol, i-ethanol, i-propanol, i-isopropyl alcohol, i-ethylene glycol, i-acetone, i-methyl ethyl ketone noma i-diketone alcohol thickener;I-HPMC eyenziwe nge-emulsified coatings inomhuzuko omuhle kakhulu omanzi;I-HPMC kune-HEC ne-EHEC kanye ne-CMC njenge-HPMC inomphumela ongcono kune-HEC ne-EHEC ne-CMC njengesigxivisi sikapende.

I-2.I-hydroxypropyl methyl cellulose efakwe esikhundleni esiphezulu inokumelana kangcono nokuhlaselwa kwamagciwane kunokushintshwa okuphansi, futhi inokuqina kwe-viscosity engcono kuma-polyvinyl acetate thickeners.Amanye ama-cellulose ethers agcinwe ngenxa yokuwohloka kweketango le-cellulose ether futhi enze i-viscosity yokumboza inciphe.

3.i-paint stripper ingaba i-HPMC encibilika emanzini (lapho i-methoxy ingu-28% kuya ku-32%, i-hydroxypropoxy ingu-7% kuya ku-12%), i-dioxymethane, i-toluene, upharafini, i-ethanol, ukulungiswa kwe-methanol, izosetshenziswa endaweni eqondile, i-viscosity edingekayo kanye nokuguquguquka.Lesi sikhumulo sikapende sisusa opende bezifutho ezivamile, amavanisha, okoqweqwe lwawo, namanye ama-epoxy esters, ama-epoxy amides, ama-epoxy amides, ama-acrylates, njll. Opende abaningi bangaxebuka emizuzwaneni embalwa, abanye opende badinga 10~15min noma ngaphezulu, lokhu i-stripper yepende ifaneleka ngokukhethekile ezindaweni zokhuni.

I-4.Upende we-emulsion wamanzi ungakhiwa izingxenye ze-100 ze-pigment ye-inorganic noma ye-organic, izingxenye ze-0.5 ~ 20 ze-alkyl cellulose encibilikayo emanzini noma i-hydroxyalkyl cellulose kanye nezingxenye ezingu-0.01 ~ 5 ze-polyoxyethylene ether noma i-ester ester.Isibonelo, umbala utholakala ngokuxuba izingxenye ezingu-1.5 ze-HPMC, izingxenye ezingu-0.05 ze-polyethylene glycol alkyl phenyl ether, izingxenye ezingu-99.7 ze-titanium dioxide kanye nezingxenye ezingu-0.3 ze-carbon black.Ingxube ibe isinyakaziswa ngezingxenye ezingu-100 ze-polyvinyl acetate eqinile engu-50% ukuze kutholwe ukunamathela, futhi akukho mehluko phakathi kwefilimu eyomile enamathelayo eyakhiwe ngokuligcoba ephepheni eliwugqinsi bese ulihlikihla kancane ngebhulashi.


Isikhathi sokuthumela: May-20-2022