Hais txog qhov teeb meem uas cov hmoov putty yooj yim rau hmoov, lossis lub zog tsis txaus. Raws li peb txhua tus paub, cellulose ether yuav tsum tau ntxiv los ua cov hmoov putty, HPMC siv rau phab ntsa putty, thiab ntau tus neeg siv tsis ntxiv cov hmoov latex redispersible. Ntau tus neeg tsis ntxiv cov hmoov polymer kom txuag tau cov nqi, tab sis qhov no kuj yog qhov tseem ceeb rau vim li cas cov hmoov putty yooj yim rau hmoov thiab feem ntau muaj teeb meem zoo ntawm cov khoom!
Cov putty ib txwm muaj (xws li 821 putty) feem ntau yog ua los ntawm cov hmoov dawb, me ntsis kua nplaum hmoov txhuv nplej siab thiab CMC (hydroxymethyl cellulose), thiab qee qhov yog ua los ntawm methyl cellulose thiab Shuangfei hmoov. Cov putty no tsis muaj kev nplaum thiab tsis tiv taus dej.
Cellulose tuaj yeem nqus dej thiab o tom qab yaj hauv dej. Cov khoom los ntawm ntau lub tuam txhab tsim khoom muaj cov nqi nqus dej sib txawv. Cellulose ua lub luag haujlwm hauv kev khaws dej hauv putty. Cov putty qhuav tsuas muaj qee lub zog ib ntus, thiab nws yuav maj mam de-hmoov tom qab lub sijhawm ntev. Qhov no muaj feem cuam tshuam nrog cov qauv molecular ntawm cellulose nws tus kheej. Cov putty zoo li no yog xoob, muaj dej nqus siab, yooj yim rau pulverize, tsis muaj zog, thiab tsis muaj elasticity. Yog tias topcoat raug siv rau saum toj, PVC qis yog yooj yim tawg thiab ua npuas dej; PVC siab yog yooj yim rau ntsws thiab tawg; vim yog dej nqus siab, nws yuav cuam tshuam rau cov zaj duab xis tsim thiab kev tsim kho ntawm topcoat.
Yog tias koj xav txhim kho cov teeb meem saum toj no ntawm cov putty, koj tuaj yeem kho cov mis putty, ntxiv qee cov hmoov latex redispersible kom haum rau kev txhim kho lub zog tom qab ntawm cov putty, thiab xaiv cov khoom zoo hydroxypropyl methylcellulose HPMC nrog kev lav zoo.
Thaum lub sijhawm tsim cov putty, yog tias cov hmoov latex uas tau ntxiv tsis txaus, lossis yog tias siv cov hmoov latex qis dua rau cov putty, nws yuav muaj feem cuam tshuam li cas rau cov hmoov putty?
Tsis txaus cov hmoov putty redispersible latex, qhov qhia tau ncaj qha tshaj plaws yog tias cov txheej putty xoob, qhov chaw raug crushed, qhov ntau ntawm cov xim siv rau topcoating yog loj, cov khoom leveling tsis zoo, qhov chaw yog ntxhib tom qab tsim zaj duab xis, thiab nws nyuaj rau tsim cov zaj duab xis xim ntom. Cov phab ntsa no feem ntau yuav tev tawm, blistering, tev tawm, thiab tawg ntawm cov zaj duab xis xim. Yog tias koj xaiv cov hmoov putty qis dua, nws yog qhov tseeb tias cov pa phem xws li formaldehyde tsim tawm ntawm phab ntsa yuav ua rau lub cev raug mob rau lwm tus.
Lub sijhawm tshaj tawm: Lub Rau Hli-15-2023