Yog vim li cas rau npuas thaum stirring:
Yog vim li cas vim li cas npuas yog generated thaum lub sij hawm sib tov ntawmepoxy cobkua nplaum yog tias cov roj tau qhia thaum lub sijhawm nplawm ua npuas. Lwm qhov laj thawj yog "cov nyhuv cavitation" tshwm sim los ntawm cov kua ua nplawm nrawm heev. Muaj ob hom npuas: pom thiab pom tsis pom. Kev siv lub tshuab nqus tsev degassing tuaj yeem tsuas yog tshem tawm cov npuas pom, tab sis nws tsis zoo rau kev tshem tawm cov npuas me me uas tsis pom ntawm tib neeg lub qhov muag.
Yog vim li cas rau npuas thaum kho:
Qhov no yog vim epoxy resin kho los ntawm polymerization, uas yog tshuaj lom neeg cov tshuaj tiv thaiv. Thaum lub sij hawm kho cov tshuaj tiv thaiv, cov npuas me me hauv epoxy resin system cua sov thiab nthuav dav, thiab cov pa roj tsis sib haum nrog epoxy system, thiab tom qab ntawd sib sau ua ke los tsim cov npuas loj dua.
Ua rau ntawm epoxy resin foaming:
(1) Cov khoom tsis ruaj tsis khov
(2) Sib tov thaum npaj cov thickener
(3) Ua npuas ncauj tom qab sau cov thickener
(4) Slurry paug txheej txheem
Kev phom sij ntawm epoxy resin foaming thaum sib tov:
(1) Ua npuas ncauj ua rau dej ntws thiab thickener noj, uas tseem yuav cuam tshuam rau qhov pom cov kua dej siab.
(2) Cov npuas tshwm sim los ntawm kev kho tus neeg sawv cev molecular amines yuav cuam tshuam rau kev tsim kho.
(3) Lub xub ntiag ntawm "ntub npuas" yuav ua rau VCM roj theem polymerization, uas yog feem ntau tsim nyob rau hauv lub nplaum nplaum.
(4) Yog tias cov npuas tsis raug tshem tawm tag nrho thaum lub sij hawm tsim kho, npuas yuav tsim tom qab kho, thiab yuav muaj ntau pinholes rau saum npoo tom qab ziab, uas yuav cuam tshuam rau cov khoom zoo.
Yuav ua li cas tshem tawm cov npuas npuas?
Feem ntau siv defoaming tus neeg saib xyuas cov khoom lag luam: silicone defoaming agents, non-silicon defoaming agents, polyether defoaming agents, mineral oil defoaming agents, high-carbon alcohol defoaming agents, thiab lwm yam.
Thaum qhov kub thiab txias qis, cov yam ntxwv ntawm cov kua tshuaj feem ntau hloov pauv yuav tshwm sim, tshwj xeeb tshaj yog cov viscosity ntawm cov kua nplaum nplaum yuav nce ntxiv thaum qhov kub thiab txias.Epoxy resin ab kua nplaum, raws li cov khoom ua kua ib txwm muaj, muaj qhov nce ntxiv ntawm viscosity tus nqi vim qhov txo qis hauv qhov kub thiab txias. Yog li ntawd, thaum siv thiab siv, npuas yog qhov nyuaj rau kev tshem tawm, kev ua haujlwm flattening yog txo, thiab kev siv lub sij hawm thiab kev kho kom zoo tsis yog qhov zoo rau kev tsim khoom thiab kev tswj xyuas. Txawm li cas los xij, los ntawm kev sib sau ua ke ntawm ntau xyoo ntawm kev tsim khoom, peb tau sau tseg qee qhov kev paub zoo los daws tau zoo thiab txo cov teeb meem tshwm sim los ntawm cov teeb meem saum toj no. Tshwj xeeb, muaj plaub txoj hauv qab no:
1. Txoj haujlwm cua sov ntawm qhov chaw:
Thaum qhov kub ntawm qhov chaw ua haujlwm poob mus rau 25 ° C, cov cua kub zoo ntawm qhov chaw ua haujlwm yuav tsum tau nce qhov kub thiab txias kom haum rau kev ua haujlwm kua nplaum (25 ° C ~ 30 ° C). Nyob rau tib lub sijhawm, cov huab cua txheeb ze ntawm qhov chaw ua haujlwm yuav tsum tau khaws cia ntawm 70%. los yog li ntawd, kom txog rau thaum qhov kub ntawm cov kua nplaum nws tus kheej yog tib yam li qhov kub thiab txias ua ntej cov kua nplaum tuaj yeem ua haujlwm thiab siv tau zoo.
Kev ceeb toom sov: Txoj kev no yog txoj hauv kev zoo tshaj plaws, tab sis tus nqi khiav lag luam yuav raug siab, thov ua tib zoo saib xyuas tus nqi accounting.
2. Boiling dej cua sov txoj kev:
Txias yuav ncaj qha txo tus nqi viscosity ntawmepoxy cobab kua nplaum thiab ho nce nws. Cov cua sov ua ntej ua ntej siv cov kua nplaum yuav ua rau nws tus kheej kub thiab txo tus nqi viscosity, ua rau nws yooj yim rau siv. Txoj kev tshwj xeeb yog muab tag nrho lub thoob los yog lub raj mis kua nplaum rau hauv cov dej kub npau npau thiab ua kom sov li 2 teev ua ntej siv cov kua nplaum, kom cov kua nplaum kub txog li 30 ℃, ces muab nws tawm, co nws ob zaug, thiab tom qab ntawd khaws cov kua nplaum ntawm qhov kub tsis tshaj 30 ℃ hauv dej sov thiab siv thaum cua sov. Thaum siv, tshem tawm cov kua nplaum thiab co txhua ib nrab teev kom sov thiab muaj pes tsawg leeg ntawm cov kua nplaum symmetrical. Tab sis yuav tsum ceev faj tshwj xeeb kom tsis txhob cia cov kua nplaum nyob hauv lub thoob lossis lub raj mis lo rau hauv dej, txwv tsis pub nws yuav ua rau muaj kev cuam tshuam loj heev.
Kev ceeb toom sov: Txoj kev no yooj yim, kev lag luam thiab siv tau, thiab cov nqi thiab cov khoom siv kuj yooj yim. Txawm li cas los xij, muaj kev phom sij zais, uas yuav tsum tau them sai sai rau.
3. Qhov cub cua sov txoj kev:
Cov neeg siv uas muaj cov xwm txheej tuaj yeem siv epoxy resin ab los ua kom sov cov kua nplaum hauv qhov cub ua ntej siv cov kua nplaum kom tsis txhob muaj kev sib cuag nrog dej. Nws yog qhov yooj yim heev. Txoj kev tshwj xeeb yog kho qhov cub kub kom txog 60 ° C, tom qab ntawd muab tag nrho lub thoob los yog lub raj mis ntawm A kua nplaum rau hauv qhov cub kom preheat, kom qhov kub ntawm cov kua nplaum nws tus kheej nce mus txog 30 ° C, ces muab cov kua nplaum tawm thiab co nws ob zaug, thiab tom qab ntawd muab cov kua nplaum rau ntawm qhov kub ntawm qhov Kho kom haum rau 30 ° C hauv nruab nrab ntawm qhov cub siv preheated npoo, tab sis yuav tsum ceev faj ib teev kom tshem tawm cov kua nplaum. symmetrical kub nrog cov khoom xyaw ..
Kev ceeb toom sov: Txoj kev no tseem yuav nce tus nqi me ntsis, tab sis nws yog qhov yooj yim thiab siv tau.
4. Defoaming agent txoj kev pab:
Txhawm rau kom nrawm nrawm tshem tawm cov npuas, koj tuaj yeem yuav tus neeg sawv cev tshwj xeeb defoaming rau epoxy resin ab-ntxiv kua nplaum, thiab ntxiv A kua nplaum nrog qhov sib piv ntawm 3‰ sab hauv, txoj kev tshwj xeeb; ncaj qha ntxiv tsis pub ntau tshaj 3% ntawm cov kua nplaum rau A kua nplaum rhuab los ntawm txoj kev saum toj no. Tus neeg saib xyuas tshwj xeeb defoaming rauepoxy resin AB, ces do sib npaug thiab sib tov nrog B kua nplaum rau siv.
Shanghai Orisen Tshiab Material Technology Co., Ltd
M: +86 18683776368 (kuj whatsapp)
T: +86 08383990499
Email: grahamjin@jhcomposites.com
Chaw nyob: NO.398 Tshiab Green Road Xinbang Town Songjiang District, Shanghai
Post lub sij hawm: Jan-07-2025