Latex kua nplaum: piav qhia, muaj pes tsawg leeg, yam ntxwv, daim ntawv thov

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Adhesive nws tus kheej yog ib yam khoom lossis cov khoom sib xyaw uas tuaj yeem ua cov organic lossis inorganic. Lawv kuj txawv ntawm daim ntawv uas lawv khaws cia. Nws tuaj yeem yog cov khoom siv hauv daim ntawv ntawm granules, kua hauv daim ntawv ntawm cov tshuaj los yog emulsion, thiab tuaj yeem ua cov hmoov hmoov, thiab lwm yam. Ntawm tag nrho cov lwm yam, cov nplaum nplaum latex sawv tawm heev.

Kev piav qhia ntawm cov khoom

Ua ntej yuav mus rau qhov kev piav qhia ntawm ib qho tshwj xeeb muaj pes tsawg leeg, nws yuav tsum tau hais tias txhua yam khoom nplaum muaj xws li cov yam ntxwv zoo li adhesion. Hauv lwm lo lus, qhov no yog qhov zoo ntawm qhov nplaum ntawm cov khoom ntawm cov khoom. Qhov ntsuas no nyob ntawm qhov kub ntawm ob lub nplaum thiab qhov chaw uas nws los rau hauv kev sib cuag. Siab, viscosity thiab wettability kuj ua lub luag haujlwm tseem ceeb.

Latex kua nplaum yog ib qho sib xyaw ntawm cov tshuaj aqueous ntawm cov roj hmab ntuj nrog ntxiv ntawm ammonia. Qee qhov kev daws teeb meem kuj tseem muaj cov khoom siv xws li cov khoom siv hluavtaws, cawv, esters, thiab lwm yam khoom ntxiv ntawm cov hauv paus chiv keeb. Qhov no compositional diversitytau coj mus rau ib hom latex adhesive zoo rau kev ua hauj lwm nrog polymer av nplaum los yog yas, piv txwv li, thiab lwm yam rau kev ua hauj lwm nrog ntoo.

Ntau yam kua nplaum

Hnub no, muaj ob hom kua nplaum uas muaj latex puag. Thawj pawg muaj xws li ntuj latex, thiab lub thib ob - hluavtaws.

Cov qauv dav dav ntawm latex adhesive, uas yog raws li cov khoom siv ntuj tsim, yog raws li hauv qab no: 30-40% roj hmab, 1-2% protein, 1-3% resins thiab lwm yam additives.

Qhov tseem ceeb ntawm daim ntawv thov no yog cov ntaub ntawv ntub dej. Hauv lwm lo lus, tom qab siv cov nplaum rau ib qho ntawm qhov chaw sib txuas, nws yuav tsum tau coj mus rau hauv kev sib cuag nrog qhov thib ob nto. Txhawm rau tshem tawm cov kua uas muaj nyob hauv cov khoom xyaw, nws yog ib qho tsim nyog kom tsawg kawg ib qho ntawm cov substrates muaj cov qauv ntxeem tau.

Nws tseem tuaj yeem ntxiv tau tias cov kua nplaum latex nrog ntuj additives tuaj yeem siv los tsim kom muaj lub siab rhiab heev. Hauv qhov no, cov txheej txheem zoo li no. Cov muaj pes tsawg leeg yog siv rau ib qho ntawm qhov chaw, nws qhuav, tom qab ntawd ob qhov chaw yuav tsum tau txuas ua ke nyob rau hauv siab.

yam ntxwv muaj pes tsawg leeg nrog ntuj latex

Nws yog ib qho tsim nyog sau cia tias los ntawm kev siv cov khoom siv ntuj tsim cov nplaum nplaum, nws tuaj yeem tau txais cov yeeb yaj kiab uas muaj lub zog sib txuas zoo, tab sis tib lub sijhawm, nws yuav muaj cov nplaum ua haujlwm tsis zoo. Txhawm rau txhim kho adhesiontivthaiv ntawm cov tshuaj, cov tshuaj nplaum feem ntau yog ntxiv rau nws, piv txwv li, phenol-formaldehyde resins.

Yuav kom tau txais lub hauv paus nplaum uas nkag siab rau lub siab, koj yuav tsum sib tov ntuj latex thiab hluavtaws. Txawm li cas los xij, ntawm no nws yuav tsum tau coj mus rau hauv tus account tias viscosity ntawm cov khoom sib xyaw yuav ntau dua li tus kheej, thiab yog li xav tau ib qho stabilizer. Rau hom latex adhesive, lub stabilizer tuaj yeem yog, piv txwv li, casein, potassium lossis ammonium oleates.

Ntxiv rau, yog tias koj sib xyaw cov roj hmab ntuj thiab chloroprene roj hmab lossis polystyrene latex, koj tuaj yeem tau txais daim kab xev nplaum. Qhov kev xaiv zoo tshaj plaws rau kev sib tov yuav yog qhov piv ntawm ntuj rau hluavtaws los ntawm 95: 5 txog 50: 50.

Lwm hom kua nplaum

Hnub no, latex-raws li adhesives yog tov nrog ib tug loj tus naj npawb ntawm lwm yam tshuaj. Piv txwv li, yog tias koj ntxiv cov roj hmab carboxylic rau ntuj latex, koj tau txais tib cov nplaum uas yog siab rhiab, tab sis koj tsis tas yuav siv cov stabilizers, nws cov qauv yog nplaum heev.

Carboxylic acid roj hmab, xws li styrene-butadiene roj hmab, yog qhov zoo rau kev tsim cov khoom sib xyaw nrog qhov siab tshaj plaws adhesion. Yuav kom tau txais cov tshuaj no, nws yog ib qho tsim nyog yuav tau siv fumaric lossis acrylic acids. Qhov thib ob yog qhov zoo tshaj plaws, thiab yog li ntawd latex-acrylic kua nplaum yog ntau heev.

Kev cuam tshuam ntawm roj hmab

Nws tsim nyog them nqi rau lwm yam tsis muaj qhov muaj pes tsawg leegroj hmab raws. Piv txwv li, lub txee lub neej yuav txawv ntawm 3 mus rau 12 lub hlis, nyob ntawm seb cov roj hmab li cas. Muaj tus yam ntxwv zoo li kho. Glue ntawm lub hauv paus no tuaj yeem ua rau ob qho tib si ntawm chav tsev kub thiab qhov kub siab. Yog hais tias qhov kub thiab txias hauv chav tsev, ces lub sij hawm kom txog rau thaum tiav hardening yog 24 teev. Nyob rau hauv dav dav, nws yog tsim nyog sau cia hais tias qhov ntau ntawm kev khiav hauj lwm kub nws txawv heev nyob ntawm seb cov yam ntxwv ntawm cov roj hmab. Piv txwv li, ntuj tuaj yeem ua haujlwm nyob rau hauv thaj tsam ntawm -50 txog +100 degrees Celsius, chloroprene ntawm -50 txog +70, PVA nyob rau hauv thaj tsam ntawm -5 txog +100.

Ib txwm, cov tshuaj no kuj muaj lub zog tensile. Qhov kev ntsuas no nyob ntawm seb cov latex siv nyob rau hauv qhov twg, nrog rau qhov twg vulcanizing system yog siv. Ib qho piv txwv ntawm kev sib txuas cov roj hmab siv xws li muaj pes tsawg leeg tuaj yeem muab. Hauv qhov no, lub zog ntawm daim ntawv cog lus yuav siab dua qhov qub zog ntawm cov roj hmab nws tus kheej.

Qhov twg yuav tsis siv kua nplaum

Raws li koj tuaj yeem nkag siab, cov kua nplaum no muaj ntau yam kev siv. Nws tuaj yeem ua raws li yuav luag txhua qhov chaw. Koj tuaj yeem ua cov nplaum nplaum rau ntawm cov xim latex. Txawm li cas los xij, tseem muaj cov ntaub ntawv uas qhov kev sib xyaw no tsis haum txhua, txawm li cas los xij nws ntxiv. Hlau tau dhau los ua qhov nto.

Cov dej-raws li feem ntau tsis haum rau cov hlau nto. Qhov laj thawj tseem ceeb yog tias chlorine raug tso tawm los ntawm cov khoom sib xyaw nrog cov polymers, thiab nws cuam tshuam rau cov hlau, ua rau nws tsis zoo.corrosion. Tsis tas li ntawd, daim ntawv cog lus lub zog nrog cov nplaum yuav tsis zoo siab rau cov qauv hlau.

Daim ntawv nplaum

Cov kev daws teeb meem no loj heev. Piv txwv li, nws yog tsim rau gluing tej yam xws li linoleum, ntaub pua plag los yog polymer vuas. Tab sis ntawm no nws yog tsim nyog ntxiv hais tias cov sib tov siv rau gluing yog tsis waterproof. Qhov no txhais tau hais tias txhua txoj kev taug kev lossis cov ntaub pua tsev uas tau muab tso nrog cov nplaum zoo li no tsis tuaj yeem ntxuav. Txawm tias me me ntawm cov dej noo uas nkag mus rau hauv qab ntawm qhov chaw tuaj yeem yooj yim rhuav tshem tag nrho cov qauv ntawm cov nplaum, ua rau cov txheej tev tawm.

Latex mastic, piv txwv li, tuaj yeem ua pobzeb. Ua ntej siv, cov tshuaj yuav tsum tau tov kom zoo, thiab tom qab ntawd siv rau qhov xav tau saum npoo nrog ib qho trowel. Txawm li cas los xij, ua ntej siv cov muaj pes tsawg leeg rau cov phab ntsa, nws yog ib qho tsim nyog los xyuas kom meej tias lawv txaus txawm tias, txwv tsis pub muaj qhov chaw tsis zoo. Nws tseem yog ib qho tseem ceeb kom paub tias qhov kev teeb tsa zaum kawg thiab hardening ntawm cov kev daws teeb meem no tshwm sim tsuas yog hnub thib tsib tom qab nws daim ntawv thov.

Ntau tus neeg kuj xav nug txog seb puas tuaj yeem ua cov nplaum nplaum rau ntawm cov xim latex. Nws yog ua tau, txij li qhov kev daws teeb meem no suav hais tias yuav luag universal. Qhov tseem ceeb tshaj plaws yog xaiv cov khoom tsim nyog raws li nws muaj pes tsawg leeg.