Hauv xyoo tas los no, hollowiav hlawstau dhau los ua cov khoom siv nrov hauv kev lag luam xws li roj teeb potting tebchaw, tooj liab-clad laminates, cov ntaub ntawv sib sib zog nqus dej hiav txwv, tsheb primers, thiab kev siv aerospace. Lawv cov txiaj ntsig tseem ceeb suav nrog kev tsim kho lub teeb, thermal rwb thaiv tsev, txo qis, kev ua haujlwm siab, thiab cov khoom tsis muaj dielectric.
Txawm li cas los xij, ntau pawg R & D thiab cov tuam txhab lag luam ntsib teeb meem tib yam: lwm lub tuam txhab siv cov ntaub ntawv no los txhim kho cov khoom lag luam thiab txo cov nqi, tab sis lawv tus kheej cov txiaj ntsig poob qis-lossis txawm tuaj nrog cov kev mob tshwm sim tsis zoo.
Thawj lo lus nug feem ntau yog:Puas yog cov iav hlaws lawv tus kheej tsis zoo?
Feem ntau, qhov teeb meem tiag tiag nyob rau lwm qhov. Kev xaiv cov khoom tsis raug, kev ua haujlwm tsis zoo, kev tsim qauv tsis zoo, thiab kev tsis nkag siab ntawm cov khoom tuaj yeem ua rau muaj kev poob siab. Cov khoom siv tib yam tuaj yeem ua tau txawv heev nyob ntawm seb nws xaiv thiab siv li cas.
Plaub qhov teeb meem feem ntau
● Kev txhim kho me me lossis tsis muaj kev txhim kho:Kev txo qis hauv qhov ntom ntom lossis txhim kho hauv thermal rwb thaiv tsev.
● Txo cov khoom ua haujlwm:Tsawg zog, hnav tsis zoo, los yog tsis muaj zog adhesion.
● Kev tsim khoom tsis ruaj khov:Bead breakage thaum sib tov, ntab, teeb, tshuaj ntsuam blockage, lossis agglomeration.
● Tsawg cov khoom tiav tiav:Ua npuas ncauj, ntxuav hniav dawb, ua kom muaj zog ntawm kev tawg, lossis nqus dej ntau dhau.
Qhov yuam kev 1: Xaiv los ntawm tus nqi hloov ntawm daim ntawv thov yuav tsum tau ua
Many buyers focus primarily on price when purchasing hollow glass beads, overlooking other important parameters such as true density, crush strength, particle size, pH, bulk density, and thermal conductivity.
Muaj tseeb tiag
Lub hom phiaj tseem ceeb ntawm hollow iav hlaws yog txo cov khoom ntom ntom thiab qhov hnyav. Yog li ntawd, lub hauv paus ntsiab lus xaiv yog xaiv cov qib qis-density uas tuaj yeem tiv taus cov txheej txheem ua haujlwm yam tsis muaj kev tawg ntau dhau. Qhov no tuaj yeem txo qhov yuav tsum tau thauj khoom thaum txo qhov cuam tshuam tsis zoo ntawm cov khoom ntawm cov khoom tiav.
Cov qib qis-density feem ntau raug nqi ntau dua vim lawv xav tau lub sijhawm ua haujlwm ntev dua, nthuav dav ntau dua thaum tsim khoom, thiab siv roj ntau dua. Lawv kuj zoo li muaj zog crush qis dua.
Ntau lub tuam txhab siv kev sib txuas ntawm cov ntawv thiab cov lej txhawm rau txheeb xyuas lawv cov qib. Piv txwv li, H15, HL15, thiab HN15 tuaj yeem qhia qhov ntom ntawm 0.15 g / cm³, thaum nyob rau hauv ib qho kev xaiv xws li 38P5500, tus lej 38 tuaj yeem sawv cev qhov ntom ntawm kwv yees li 0.38 g / cm³. Ib txwm paub meej tias cov chaw tsim khoom muab qhab nia. Formulation loading feem ntau suav nrog qhov tseeb qhov ceev.
Crush Strength thiab Survival Rate
Even when two grades have similar density and crush-strength specifications, their breakage rates can differ between manufacturers. Tus nqi tawg ntau dua yuav txo tau qhov txiaj ntsig zoo ntawm qhov hnyav, uas yuav xav tau kev thauj khoom ntau dua thiab nce nqi tag nrho.
Ua ntej kev yuav khoom, nug tus neeg muag khoom rau cov ntaub ntawv cuam tshuam-lub zog thiab qhov feem pua ntawm cov hlaws dai kom zoo tom qab ua tiav.
Crush Strength Requirements rau txawv Industries
Qhov tseeb qhov ceev feem ntau yog li ntawm 0.10 txog 0.60 g / cm³. Cov qib high-density feem ntau muab ntau dua crush lub zog, txawm hais tias qhov tseeb kev ua tau zoo nyob ntawm qib khoom.
● Roj hmab kev lag luam:Qib nrog crush lub zog siab dua 5,500 psi feem ntau suav hais tias, feem ntau nrog qhov ntom ntawm 0.38, 0.42, 0.50 g / cm³, lossis siab dua.
● Coatings kev lag luam:Cov qib qis-density feem ntau muab thermal rwb thaiv tsev zoo dua. Ib qib nrog qhov ceev ntawm 0.15 g / cm³ yuav muaj thermal conductivity nyob ib ncig ntawm 0.04 W / (m·K), thaum conductivity feem ntau nce raws li qhov ceev nce mus rau 0.60 g / cm³. Ntawm qhov sib tov nrawm qis dua 500 rpm, qib nrog crush lub zog txog li 1,000 psi thiab qhov ceev ntawm 0.10-0.25 g / cm³ yuav tsim nyog. Ntawm qhov ceev tshaj 1,000 rpm, qib siab dua-nruab nrab nyob ib puag ncig 0.38 g / cm³ nrog crush lub zog siab dua 4,000 psi tej zaum yuav tsim nyog dua.
● Elastomers:Rau ib leeg-ntsia hlau extrusion, qib nrog qhov ceev ntawm ib ncig ntawm 0.38 g / cm³ thiab tsoo lub zog ntawm tsawg kawg yog 4,000 psi tej zaum yuav haum. Rau cov ntaub ntawv viscosity siab xws li qee cov ABC tebchaw thiab nylon ua tiav ntawm ntxaib-ntsia hlau extruders, qib nyob ib ncig ntawm 0.46 g / cm³ nrog crush zog ze 16,000 psi tej zaum yuav xav tau.
● Cov ntaub ntawv pov thawj:Hydrostatic siab nce li ntawm 1 MPa rau txhua 100 meters ntawm qhov tob. Rau kev khiav hauj lwm qhov tob ntawm 500-2,000 meters, sib haum mus rau kwv yees li 5-20 MPa, nruab nrab-density qib nyob ib ncig ntawm 0.38-0.46 g / cm³ tej zaum yuav tsim nyog, nyob ntawm seb qhov yuav tsum tau muaj kev nyab xeeb margin thiab cov kev pab cuam.
Cov duab no yog cov kev xaiv dav dav. Ib txwm txheeb xyuas cov qhab nia tshwj xeeb thiab ntsuas kev ua tau zoo raws li koj tus kheej cov txheej txheem ua haujlwm.
Qhov yuam kev 2: Kev ua tsis raug-ntaus shear thiab sib tov
Hollow iav hlaws muaj nyias-walled, hollow qauv. Tsis zoo li cov khoom ntim khoom xws li calcium carbonate thiab talc, lawv tsis tuaj yeem tiv thaiv tsis muaj kev txwv, kev sib xyaw ua haujlwm siab, lossis kev sib tsoo ntev.
Feem ntau ua yuam kev suav nrog:
● High-speed dispersion lossis sib tsoo ua ke nrog lwm cov hmoov, ua rau muaj kev puas tsuaj thiab cov hlaws tawg.
● Ntxiv cov hlaws dai ntawm qhov tsis ncaj ncees lawm, ua rau lawv raug txiav ntau dhau.
● Siv kev sib xyaw ua ke uas siab dhau los yog sib xyaw kom ntev dhau, ua rau cov qauv hollow puas.
Thaum cov hlaws tawg, lawv dhau los ua cov iav fragment es tsis yog cov hollow hais. Cov khoom yuav poob ntau ntawm nws lub teeb yuag thiab insulating kev ua tau zoo, thaum cov khoom tawg tuaj yeem txo qhov toughness thiab lub zog ntawm cov khoom tiav.
Ua ntej xaiv cov qib, tham txog koj qhov kev teeb tsa tsim khoom nrog tus neeg muag khoom. Cov ntsiab lus tseem ceeb suav nrog seb koj puas siv cov khoom siv sab hauv, kneader, ib leeg-ntsia hlau lossis ntxaib-ntsia hlau extruder, lossis compression-moulding tshuab, nrog rau molding siab, sib tov ceev, sijhawm ua haujlwm, thiab cov khoom siv xim.
yuam kev 3: Siv cov qauv tsis raug
Qee cov tuam txhab xav tias tsuas yog hloov ib feem ntawm cov khoom siv ua ke nrog cov iav hollow hlaws yuav xa cov txiaj ntsig xav tau. Hauv kev muaj tiag, lawv cov roj nqus, thaj chaw tshwj xeeb, lub ntiajteb txawj nqus, thiab pH tuaj yeem sib txawv ntawm cov khoom siv ib txwm muaj.
Cov teeb meem feem ntau formulation muaj xws li:
● Tsis zoo viscosity txuam:Cov hlaws dai ntab, khom, lossis agglomerate vim tias cov txheej txheem resin tsis tuaj yeem tswj tau qhov sib txawv.
● Kev xaiv tsis txaus dispersant:Tsis zoo sib xws ntawm cov hlaws saum npoo thiab cov qauv tuaj yeem ua rau cov pinholes thiab npuas.
● Kev thauj khoom tsis raug:Kev sib ntxiv ntau dhau tuaj yeem txo cov khoom siv dag zog, thaum tsis txaus ntxiv yuav ua rau muaj txiaj ntsig me ntsis.
● Tsis txaus lub tshuab nqus tsev degassing:Cov cua nkag tuaj yeem ua rau tawg, tawg, lossis o hauv cov txheej txheem thiab cov khoom pwm.
Qhov tseem ceeb ntawm kev tshem tawm yog tias cov ntawv thov ua tiav yog nyob ntawm tsis yog ntawm cov khoom siv raw zoo xwb tab sis kuj tseem nyob ntawm kev tsim thiab txheej txheem kev sib raug zoo. Tau txais qhov sib npaug ntawm cov khoom siv, kev tsim, thiab kev ua haujlwm yog qhov tseem ceeb.
yuam kev 4: Xaiv tus neeg muab khoom tsis raug
Ntau tus neeg yuav khoom tsis paub txog qhov sib txawv ntawm ntau yam khoom muag xws li iav hlaws dai. Khoom iav hlaws dai, nthuav iav granules, cenospheres rov qab los ntawm ya tshauv, thiab ua haujlwm siab hollow iav microspheres yog cov khoom sib txawv nrog cov qauv sib txawv thiab cov khoom. Imported thiab domestically manufactured qib kuj txawv nyob rau hauv zoo thiab kev ua tau zoo.
Tsis meej pem cov khoom no tuaj yeem ua rau cov qauv tsis zoo, kev sim tsis ua tiav, thiab ncua sijhawm ntawm kev tsim khoom.
Thaum ntsuam xyuas tus neeg muag khoom, paub meej txog cov khoom siv, qhov tseeb ntom ntom, particle-loj faib, zuaj lub zog, thiab qhov tsis zoo-bead ciaj sia taus. Thov cov ntaub ntawv thiab cov qauv uas phim koj cov kev ua haujlwm tiag tiag, tom qab ntawd ua qhov kev sim ua ntej tsiv mus rau tag nrho cov khoom lag luam.
