Dej-raws li polyvinyl acetate xim yog ib qho ntawm feem ntau nrhiav tom qab thiab nrov ntawm kev tsim kho kev lag luam. Nws poob rau hauv kev hlub nrog cov neeg siv khoom vim muaj ntau yam zoo thiab qhov zoo, uas yuav tau tham hnub no. Wb kuj tham txog cov ntsiab lus tsis zoo, cons, GOST, daim ntawv pov thawj ntawm kev ua raws, cov khoom tsis zoo thiab cov yam ntxwv.
Kev xaiv
Hnub suab lus qhia, tsis yog cov kws tshaj lij hauv kev lag luam tha xim maj nrawm mus rau kev tsim kho kev lag luam rau dej-raws li polyvinyl acetate xim. Kev xaiv yog, tab sis ua ntej yuav khoom nws yog ib qho tsim nyog yuav tsum tau them sai sai rau ob peb lub ntsiab lus tseem ceeb. Tau kawg, tus nqi ntawm cov khoom siv hauv tsev ua lub luag haujlwm loj hauv kev xaiv lawv los ntawm cov neeg yuav khoom, tab sis lwm cov qauv yuav tsum tsis txhob txo qis, uas yog:
- viscosity;
- yooj yim ntawm daim ntawv thov;
- composition;
- hnub tas sij hawm;
- khaws cia tshwj xeeb;
- kev siv nyiaj.
Composition
Xav txog cov yam ntxwv ntawm dej-raws li polyvinyl acetate xim, ib tus tsis tuaj yeem pab tab sis tsa qhov teeb meem ntawm kev sib xyaw. Qee cov kws tshaj lij hu cov khoom siv hauv tsev "roj hauv dej". Cov xim muaj cov khoom xyaw hauv qab no:
- emulsion (polyvinyl acetate);
- plasticizers;
- stabilizers;
- xim pigment.
Ntau tus neeg pib tshiab tsis meej pem cov xim pleev xim nrog dej sib cais. Qhov tseeb, xaiv cov khoom lag luam hauv kev tsim kho lossis hauv khw muag khoom, koj tuaj yeem muab cov xim pleev xim kom raug. Nws yuav luag tib yam, lub hauv paus ntsiab lus ntawm "ua haujlwm" yog tib yam. Cov xim yog siv rau ntawm qhov chaw npaj, tom qab ntawd cov dej tiv thaiv evaporates thiab ploj mus, thiab cov xim xim tawv tawv thiab nyob twj ywm rau ntawm phab ntsa, tsim cov xim zoo nkauj sib npaug.
Nyob zoo ib tsoom niam txiv kwv tij neej tsas sawv daws.
Polyvinyl acetate dej-raws li xim pleev xim yog dav siv los ntawm cov kws paub txog kev pleev xim rau pleev xim rau sab hauv phab ntsa thiab qab nthab. Nws muaj ntau qhov zoo thiab cov yam ntxwv zoo uas ua rau nws yuav luag tsis muaj qhov tseem ceeb thiab piav qhia cov neeg siv khoom txoj kev hlub rau nws:
- Qhov tsis hnov tsw ntawm cov xim, uas muab ntau yam xim thiab cov kua roj vanish, yog xyaum tsis tuaj ntawm no.
- Nyob rau hauv cov muaj pes tsawg leeg koj yuav tsis pom tej yam teeb meem, "stinky" kuab tshuaj, thiab lwm yam.
- Qhov nofireproof phab ntsa npog.
- Stoically tolerates pwm thiab mildew.
- Nws muaj zog tiv thaiv alkalis thiab acids.
- Thaum ntsib lub hnub yuav tsis ploj mus sai. Txawm hais tias koj txiav txim siab pleev xim rau phab ntsa hauv chav tshav ntuj, tsis txhob txhawj. Koj tuaj yeem yuav cov xim PVA dej thiab pleev xim rau hauv chaw zov me nyuam thiab txawm tias chav ua noj nrog nws.
- Cov xim zoo li no tau nce "kev mob siab" thiab kev sib cuag zoo nrog cov xim pleev xim.
- Nrog kev pab los ntawm ib qho tshwj xeeb tinting muab tshuaj txhuam, koj tuaj yeem ua rau txhua qhov ntxoov ntxoo. Ntxiv mus, cov xim tuaj yeem hloov kho thiab tsim los ntawm tus neeg yuav khoom nws tus kheej. Koj tsis tas yuav tig mus rau cov kws tshaj lij rau qhov no. Nws yooj yim, ncaj ncees, thiab txuag nyiaj. Rau lub hauv paus, raws li txoj cai, cov xim dawb yog coj mus rau cov xim uas twb tau ntxiv lawm. Nws yog ntshaw tias nws yog ntawm tib lub tuam txhab raws li cov xim nws tus kheej. Mixed, thov rau phab ntsa.
- Zoo soluble hauv dej. Yog tias tsim nyog, nws yog diluted nrog dej kais dej rau qhov xav tau sib xws. Tsis tas yuav siv nyiaj thiab yuav cov kuab tshuaj tshwj xeeb thiab cov thinners.
- Kev sib xyaw tuaj yeem siv rau phab ntsa qhuav thiab pob zeb.
- Tom qab cov txheej txheej dries, ib qho zoo kawg nkaus, elastic, txawm tias xim zaj duab xis rau ntawm phab ntsa. Cov phab ntsa npog nrog dej-raws li polyvinyl acetate xim zoo nkauj heev thiab zoo nkauj.
Flaws
Yog tias koj pom cov xim dej zoo li polyvinyl acetate,muaj ib daim ntawv pov thawj ntawm conformity, tag nrho cov hnub tas sij hawm yog affixed, ces nws yuav muaj tag nrho cov saum toj no txheej txheem zoo. Txawm li cas los xij, cov kws tshaj lij tseem hais txog ntau qhov tsis zoo ntawm cov khoom siv pleev xim no.
Ua ntej, hom xim no tsis tuaj yeem siv rau kev siv sab nraum zoov. Hmoov tsis, nws tsis yog npaj rau kev ua haujlwm sab nraum zoov. Thib ob, nws yog siv tshwj xeeb hauv chav qhuav rau pleev xim phab ntsa lossis qab nthab. Rau chav dej, chav dej da dej, sauna, thiab lwm yam xim xim dej tsis haum.
Yog tias koj npaj yuav thov rau ntawm cov ntoo saum npoo, ces koj yuav tsum xub siv sijhawm thiab npaj txheej " ntxhib". Cov ntoo yuav tsum tau xuab zeb thiab ntxuav. Txwv tsis pub, qhov saum npoo yuav tsis tsuas yog "noj" ntau cov xim xim, tab sis cov xim yuav tsis ua kom pom tseeb (cov xim yuav ploj mus, tsis txaus ntseeg).
Certification
Thaum yuav, nws raug pom zoo kom xav kom cov chaw tsim khoom lossis tus muag khoom kom muaj daim ntawv pov thawj ntawm kev ua raws. Polyvinyl acetate dej-raws li xim yuav ua tau zoo nyob rau hauv cov ntaub ntawv no. Cov khoom siv hauv tsev yuav muaj tag nrho cov txheej txheem saum toj no ntawm cov khoom zoo thiab cov yam ntxwv. Yog tias tus neeg muag khoom tsis muaj daim ntawv pov thawj thiab lwm yam ntaub ntawv rau cov khoom pleev xim, ces nws yog qhov zoo dua kom tsis txhob yuav khoom thiab mus rau lwm lub khw.
Txawm tias txoj cai lij choj tso cai rau daim ntawv pov thawj ntawm cov xim thiab cov kua roj vanish, cov tuam txhab tsim kev ntseeg yuav ib txwm ua lawv cov khoom raws li kev lees paub.qauv. GOST dej-raws li polyvinyl acetate xim - 28196-89.
Price
Kho yog, tau kawg, kim heev. Txawm li cas los xij, cov xim pleev xim dej tsis yog cov khoom siv kim heev, thiab peb tsis xav kom txuag ntawm nws qhov kev yuav khoom. Tus txheej txheem loj npaum li cas ntawm cov xim pleev xim? Ib kilogram ntawm cov xim muaj pes tsawg leeg raug nqi tus neeg yuav tsib caug-tsib rubles (qhov kev xaiv pheej yig tshaj plaws uas tuaj yeem pom) thiab ntau dua.
Tau kawg, tus nqi ntawm cov xim yuav maj mam nce ntxiv, vim tias cov khoom siv tshiab siv hauv nws cov khoom lag luam tau kim dua txhua zaus. Qhov no yog ib txwm txheej txheem, uas yog peculiar tsis tsuas yog rau lub tsev cov ntaub ntawv. Koj yuav tsum tsis txhob tsis kam yuav cov xim zoo nkauj nrog cov txheej txheem loj ntawm cov yam ntxwv zoo. Cov neeg pleev kob uas muaj txuj ci hais tias tsuas yog cov xim pleev xim dej tuaj yeem pab coj cov tswv yim tsim thiab cov kev daws teeb meem rau lub neej.
