1. Lub luag haujlwm ntawm cov khoom ntim khoom
Ntxiv cov fillers xws li calcium carbonate, av nplaum, aluminium hydroxide, iav flakes, iav microbeads, thiab lithopone rau polyester cob thiab disperse lawv los tsim ib tug resin sib tov.Nws txoj haujlwm yog raws li nram no:
(1) Txo cov nqi ntawm FRP cov ntaub ntawv (xws li calcium carbonate thiab av nplaum);
(2) Txo qhov curing shrinkage npaum li cas los tiv thaiv cov kab nrib pleb thiab deformation los ntawm shrinkage (xws li calcium carbonate, quartz hmoov, iav microspheres, thiab lwm yam);
(3) Txhim kho resin viscosity thaum molding thiab tiv thaiv resin dripping.Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias kev nce ntxiv hauv viscosity qee zaum tuaj yeem ua qhov tsis zoo;
(4) Tsis muaj pob tshab ntawm cov khoom tsim (xws li calcium carbonate thiab av nplaum);
(5) Whitening ntawm cov khoom tsim (xws li barium sulfate thiab lithopone);
(6) Txhim kho corrosion kuj ntawm cov khoom tsim (mica, iav los xij, thiab lwm yam);
(7) Txhim kho cov nplaim taws ua haujlwm ntawm cov khoom tsim (txhuas hydroxide, antimony trioxide, chlorinated paraffin);
(8) Txhim kho qhov tawv thiab tawv ntawm cov khoom tsim (xws li calcium carbonate, iav microspheres, thiab lwm yam);
(9) Txhim kho lub zog ntawm cov khoom tsim (iav hmoov, potassium titanate fibers, thiab lwm yam);
(10) Txhim kho lub teeb yuag thiab rwb thaiv tsev ntawm cov khoom molded (ntau yam microspheres);
(11) Muab los yog ua kom cov thixotropy ntawm resin sib tov (xws li ultrafine anhydrous silica, iav hmoov, thiab lwm yam).
Nws tuaj yeem pom tias lub hom phiaj ntawm kev ntxiv cov fillers rau cov resins muaj ntau haiv neeg, yog li nws yog ib qho tseem ceeb uas yuav tau xaiv cov fillers haum raws li cov hom phiaj sib txawv kom siv tag nrho lub luag haujlwm ntawm cov fillers.
2. Kev ceev faj rau kev xaiv thiab siv cov fillers
Muaj ntau hom fillers.Yog li ntawd, nws yog ib qho tsim nyog yuav tau xaiv cov khoom ntim khoom tsim nyog thiab qib rau lub hom phiaj ntawm kev siv, uas mus yam tsis tau hais.Cov kev ceev faj dav dav thaum xaiv cov fillers tsis yog tsuas yog xaiv ntau yam nrog cov nqi thiab kev ua haujlwm tau zoo, tab sis kuj yuav tsum tau them sai sai rau cov ntsiab lus hauv qab no:
(1) Tus nqi ntawm cov resin absorbed yuav tsum yog nruab nrab.Tus nqi ntawm cov resin absorbed muaj feem cuam tshuam rau viscosity ntawm resin mix.
(2) Lub viscosity ntawm cov resin sib tov yuav tsum tsim nyog rau kev ua haujlwm molding.Ntau qhov kev hloov kho rau cov viscosity ntawm cov khoom sib tov tuaj yeem ua los ntawm diluting nrog styrene, tab sis ntxiv ntau cov fillers thiab diluting nrog styrene yuav ua rau txo qis FRP kev ua tau zoo.Lub viscosity ntawm cov khoom sib tov yog qee zaum cuam tshuam los ntawm kev sib xyaw, kev sib xyaw ua ke, lossis kev sib ntxiv ntawm cov khoom siv qhov chaw hloov pauv.
(3) Cov yam ntxwv curing ntawm resin sib tov yuav tsum haum rau cov pwm molding.Cov yam ntxwv kho ntawm cov khoom sib tov yog qee zaum cuam tshuam los ntawm cov muab tub lim nws tus kheej los yog cov adsorbed lossis sib xyaw cov dej noo thiab cov khoom txawv teb chaws hauv qhov muab tub lim.
(4) Cov khoom sib tov yuav tsum nyob ruaj khov rau ib lub sijhawm.Rau qhov tshwm sim ntawm kev daws teeb meem thiab kev sib cais ntawm cov fillers vim sawv ntsug, tej zaum nws yuav raug tiv thaiv los ntawm kev muab cov resin nrog thixotropy.Qee lub sij hawm, txoj kev zam kom tsis txhob muaj qhov zoo li qub thiab tsis tu ncua kev sib xyaw ua ke kuj tseem siv los tiv thaiv kev sib haum xeeb ntawm cov fillers, tab sis nyob rau hauv cov ntaub ntawv no, nws yog ib qho tsim nyog yuav tau xav txog kev tiv thaiv kev sib haum xeeb thiab tsub zuj zuj ntawm fillers nyob rau hauv lub raj xa dej los ntawm lub thawv uas muaj cov tov khoom mus rau lub forming. qhov chaw.Thaum qee qhov microbead fillers tuaj yeem ua rau sab sauv sib cais, nws yog ib qho tsim nyog yuav tsum tau lees paub cov qib.
(5) Lub permeability ntawm cov resin sib tov yuav tsum haum rau tus neeg teb xov tooj cov txheej txheem.Qhov sib ntxiv ntawm cov fillers feem ntau txo cov pob tshab ntawm cov khoom sib tov thiab kuj txo cov ductility ntawm cov resin thaum txheej txheej.Yog li ntawd, lub impregnation, defoaming, thiab kev txiav txim thaum lub sij hawm molding tau ua nyuaj.Cov yam tseem ceeb no yuav tsum tau txiav txim siab los txiav txim qhov piv ntawm cov resin sib tov.
(6) Kev saib xyuas yuav tsum tau them rau qhov tshwj xeeb lub ntiajteb txawj nqus ntawm cov resin sib tov.Thaum siv cov fillers ua cov ntaub ntawv ntxiv los txo cov nqi ntawm cov khoom siv, qhov tshwj xeeb ntawm qhov sib xyaw ntawm cov resin sib tov nce piv rau cov resin, qee zaum tsis tau raws li qhov xav tau ntawm qhov xav tau ntawm kev txo cov nqi khoom.
(7) Qhov kev hloov kho saum npoo ntawm cov fillers yuav tsum tau tshawb xyuas.Filler deg modifiers muaj txiaj ntsig zoo hauv kev txo cov viscosity ntawm cov khoom sib tov, thiab cov khoom sib txawv ntawm qhov sib txawv tuaj yeem txhim kho cov neeg kho tshuab lub zog ntxiv rau cov dej tsis kam, huab cua tsis kam, thiab tshuaj lom neeg.Kuj tseem muaj ntau hom fillers uas tau kho saum npoo, thiab qee qhov siv lub npe hu ua "txhua txoj kev sib xyaw" los hloov kho qhov chaw ntawm cov fillers.Ntawd yog, thaum sib xyaw cov khoom sib xyaw ua ke, cov fillers thiab cov hloov pauv tau ntxiv ua ke rau cov resin, qee zaum cov nyhuv zoo heev.
(8) Lub defoaming nyob rau hauv cov resin sib tov yuav tsum tau ua kom huv si.Fillers feem ntau siv nyob rau hauv daim ntawv ntawm micro hmoov thiab hais, nrog rau ib tug loj heev tshwj xeeb cheeb tsam.Nyob rau tib lub sijhawm, kuj tseem muaj ntau qhov chaw uas micro hmoov thiab cov khoom sib sau ua ke nrog ib leeg.Yuav kom disperse cov fillers rau hauv cov resin, cov resin yuav tsum tau ua kom nruj nreem nplawm, thiab cua yog kos rau hauv qhov sib tov.Tsis tas li ntawd, huab cua kuj tau kos rau hauv cov ntim loj ntawm cov fillers.Raws li qhov tshwm sim, cov huab cua tsis txaus ntseeg tau muab sib xyaw rau hauv cov khoom sib xyaw ua ke, thiab hauv lub xeev no, FRP tau txais los ntawm kev muab nws rau molding yog qhov ua rau ua npuas thiab voids, qee zaum ua tsis tiav qhov kev xav tau.Thaum nws tsis tuaj yeem ua kom tag nrho defoaming nkaus xwb los ntawm kev sawv ntsug tom qab sib tov, lub hnab ntim cov ntaub lo lo ntxhuav los yog lub siab txo tuaj yeem siv los tshem tawm npuas.
Ntxiv nrog rau cov ntsiab lus saum toj no, kev tiv thaiv plua plav yuav tsum tau coj mus rau hauv qhov chaw ua haujlwm thaum siv cov fillers.Cov khoom xws li ultrafine particulate silica muaj li ntawm dawb silica, alumina, diatomaceous lub ntiaj teb, khov pob zeb, thiab lwm yam yog cais raws li Class I plua plav, thaum calcium carbonate, iav hmoov, iav flakes, mica, thiab lwm yam yog cais raws li Class II hmoov av.Tseem muaj cov kev cai ntawm kev tswj cov concentration ntawm ntau yam micro hmoov nyob rau hauv ib puag ncig cua.Cov khoom siv hluav taws xob hauv zos yuav tsum tau nruab thiab cov cuab yeej tiv thaiv kev ua haujlwm yuav tsum tau siv nruj me ntsis thaum tuav cov hmoov ntim khoom.
Post lub sij hawm: Feb-18-2024
