Kev hloov pauv los ntawm qhov taw tes- qhov chaw LED teeb pom kev zoo rau cov kab ntawv sib txawv yog ib qho tseem ceeb tshaj plaws ntawm kev hloov kho qhov muag hauv kev teeb pom kev lag luam thiab kev lag luam hauv kaum xyoo dhau los.Polycarbonate extrusion profiles-tshwj xeeb tsim kho rau LED sawb kev sib koom ua ke- tau tshwm sim raws li cov txheej txheem kev daws teeb meem uas cuam tshuam tsis kam, thermal stability, thiab tswj luminance faib cuam tshuam. Cov khoom siv hauv paus ntsiab lus hais txog ntau hom kev ua tsis tiav uas ua rau muaj kev cuam tshuam ua ntej acrylic thiab iav diffuser, tshwj xeeb tshaj yog nyob rau hauv siab - tsheb thauj khoom ib puag ncig thiab kev teeb tsa kev lag luam raug rau kev ntxhov siab lossis kub hloov pauv.
Yog vim li cas Polycarbonate Dominates Diffuser Segment
Txhua tus neeg uas tau cuam tshuam nrog tawg acrylic lens npog hauv lub tsev khaws khoom paub qhov mob taub hau. PC diffusers coj kwv yees li 25 npaug ntawm qhov cuam tshuam lub zog ntawm PMMA sib npaug, thiab tus lej ntawd tsis yog kev lag luam- nws tau yug los ntawm ASTM D256 Izod qhov kev ntsuam xyuas ntawm 12-18 ft-lb/in piv rau sub-1 ft-lb/in rau cov qauv acrylics. Peb tau pom kev teeb tsa hauv cov chaw faib khoom uas qhov kev sib cuag forklift yuav rhuav tshem cov tsoos npog. Polycarbonate tsuas yog dents.
Lub teeb kis tau tus mob nyob ib ncig ntawm 88% rau cov qib ntshiab thiab 65-80% rau opal diffusing variants-ze txaus rau acrylic's 92% uas cov delta yuav tsis cuam tshuam thaum tsim tag nrho cov kev ua tau zoo. Qhov tseem ceeb tshaj yog dab tsi tshwm sim ntawm qhov sib cuam tshuam ntawm LED nti thiab diffuser nto.
Kub Spot Elimination thiab Lambertian Scattering
LED strips tsis muaj qhov sib txawv ua kom pom cov ntsiab lus tsis sib xws. Tib neeg lub qhov muag pom qhov sib txawv ntawm qhov luminance saum toj no kwv yees li 10% qhov sib txawv hauv qhov pom kev sab nraud-qhov no yog vim li cas cov khoom nyoos SMD5050 lossis 2835 arrays zoo li pheej yig tsis hais CRI lossis xim kub. Polycarbonate diffuser profiles hloov cov ntsiab lus no mus rau hauv cheeb tsam los ntawm ob lub tswv yim: deg microstructure thiab embedded scattering hais.
Niaj hnub nimno extrusion tebchaw los ntawm Sabic (Lexan LS2), Covestro (Makrolon), thiab cov neeg tsim khoom hauv Suav teb ua tiav qhov txiaj ntsig ntawm 85-95% thaum tswj kev sib kis siab dua 75%. Txoj kev tawg mus rau Lambertian kev faib tawm-lub ntsiab lus radiance tshwm tas li tsis hais lub kaum sab xis saib. Qhov no tseem ceeb heev rau cov khw muag khoom teeb pom kev zoo uas cov neeg siv khoom mus cuag cov khoom siv los ntawm ntau cov lus qhia.
Lub nti-rau- diffuser kev xam qhov deb tseem ua rau cov neeg sib koom ua ke. Ntawm 10mm sib cais nrog 120℃beam lub kaum sab xis LEDs, koj xav tau roughly 80+ haze kom ua tiav qhov pom kev sib xws. Tso tseg qhov kev ncua deb mus rau 5 hli thiab koj tab tom saib ntawm microprism nto kho lossis siab dua particle loading kom them.
Thermal Performance-Zaj Dab Neeg
Polycarbonate lub tshav kub deflection kub ntawm 129℃piv rau acrylic's 93℃suab zoo kawg nkaus kom txog rau thaum koj paub zoo-tsim LED sawb tshuab yuav tsum tsis txhob mus txog qhov pib. Qhov zoo ntawm thermal zoo nyob rau lwm qhov: qhov kev ruaj ntseg ntawm -40℃mus rau 120℃lub hnab ntawv ua haujlwm txhais tau tias PC diffusers tsis warp, hneev nti, lossis cais tawm ntawm txhuas extrusion raws hauv thermal cycling.
Aluminium profiles tseem yog thawj txoj kev tshav kub rau LED sawb thermal tswj. Lub 6063-T5 alloy ntau rau kev lag luam extrusion muaj ~ 201 W / (m·K) conductivity-tshaj ib txhiab npaug siab dua li cov polymer diffuser. Lub diffuser txoj haujlwm yog kho qhov muag, tsis yog thermal. Cov neeg tshwj xeeb uas xav tau ntau dua cov khoom siv hluav taws xob thermal thaum tsis quav ntsej cov dab dej kub geometry yog daws qhov teeb meem tsis raug.
UL94 thiab Flame Rating Considerations
Polycarbonate inherently ua tiav UL94 V-2 qhov ntsuas yam tsis muaj tshuaj ntxiv. V-0 formulations muaj nyob rau hauv daim ntawv thov uas yuav tsum tau txhim khu kev qha hluav taws-kev ua lag luam plenums, loj thauj mus los, chaw kho mob. PMMA yuav tsum tau brominated nplaim retardants kom ncav cuag qhov kev ua tau zoo sib npaug, qhia qhov muaj peev xwm kho qhov muag degradation thiab ib puag ncig kev txhawj xeeb.
The flame retardant balancing act in polycarbonate compounds is tricky. Additives that improve V-0 performance often reduce light transmission or accelerate yellowing. Premium formulations from Covestro and Trinseo have cracked this-maintaining >80% kis tau tus mob thaum ntsib 5VA / 5VB qhov yuav tsum tau muaj ntawm 2.5-3mm thickness. Cov kev xaiv nyiaj txiag cuam tshuam rau qee qhov chaw. Ib txwm thov cov ntaub ntawv cov ntaub ntawv nrog cov ntaub ntawv UL tiag tiag, tsis yog 'UL94 rated' kev lag luam thov.
Kev siv sab nraum zoov thiab UV Degradation
Qhov no yog qhov twg polycarbonate lub koob npe nrov yuav raug ntaus. Unstabilized PC yellows nyob rau hauv UV raug los ntawm daim duab-Fries rearrangement thiab photooxidation mechanisms. Humidity accelerates tus txheej txheem. Koj yuav pom kev sib kis poob ntawm 5-15% hauv 3-5 xyoos ntawm kev tawm sab nraum zoov nyob ntawm qhov latitude thiab huab cua.
UV- cov qhab nia ruaj khov muaj nyob. Co-cov khoom siv extruded nrog UV- nqus cov khaubncaws sab nraud povtseg, kev kho saum npoo nrog benzotriazole lossis benzophenone stabilizers, thiab cov txheej txheem infusion tsom rau kev tiv thaiv ntawm qhov chaw raug tag nrho txuas ntxiv kev pab cuam lub neej. Tab sis rau cov ntawv thov sab nraum zoov uas raug tshav ncaj qha, PMMA tseem yog qhov zoo dua ntev - lub sijhawm ua haujlwm kho qhov muag. Cov khoom siv xaiv nyob ntawm seb koj puas txhawj xeeb txog ib tus neeg ncaws pob lossis lub hnub ua noj nws dhau kaum xyoo.
Kev teeb tsa sab hauv tsev ntsib kev txhawj xeeb txog UV tsawg los ntawm LED qhov chaw lawv tus kheej. Niaj hnub nimno dawb LEDs emit negligible UV- lub phosphor hloov dua siab tshiab uas tsim lub teeb dawb los ntawm xiav tuag emission tsis tsim teeb meem wavelengths. Qhov sib thooj degradation nyob rau hauv tsev PC diffusers yog thermal, tsis photonic.
Kev sib xyaw ua ke ntawm Channel thiab kev teeb tsa ua haujlwm
PC diffuser npog snap lossis swb rau hauv txhuas extrusion raws tsim rau lub hom phiaj. Nto mount, recessed, ces kaum, pendant, thiab nyob rau hauv - hauv av profiles haum zoo ib yam li architectural daim ntawv thov. Lub diffuser muab kev tiv thaiv txhua yam rau LED sawb tiv thaiv plua plav ingress thiab lub cev sib tiv tauj thaum tsim cov yam ntxwv kho qhov muag ntawm cov zis.
Txiav- peev xwm tseem ceeb hauv thaj teb. Polycarbonate cov cav tov huv si nrog tus qauv hacksaw hniav, qhab nia, los yog snips yam tsis muaj ntug chipping yam ntxwv ntawm acrylic. Qhov no tso cai rau ntawm - hloov qhov ntev ntawm qhov chaw yam tsis muaj cov khoom tsim tshwj xeeb. Cov kaus mom kawg kaw lub rooj sib txoos thiab muab kev ntxhov siab rau cov hlau lead.
Dav txuam deserves saib. Diffuser sab hauv qhov ntev yuav tsum ua raws li LED sawb dav -8mm, 10mm, 12mm, los yog dav dua rau siab -density arrays-nrog txaus clearance rau nplaum backing thickness. Kev tshem tawm tsis txaus ua rau muaj kev ntxhov siab ntawm kev teeb tsa thiab muaj peev xwm ua kom puas tsuaj.
Qhov twg PC Diffused Strips Excel
Hauv qab - txee chav ua noj khoom siv tau txais txiaj ntsig los ntawm kev sib xyaw ua ke ntawm kev cuam tshuam thiab txawm tias lub teeb pom kev zoo. Cov khw muag khoom tso khoom txee-tshwj xeeb yog iav txee ntug- teeb tsa teeb pom kev zoo- tso siab rau PC diffusers rau dotless linear effect uas ua rau cov khoom muag zoo tshaj. Cove teeb pom kev zoo nyob rau hauv kev lag luam interiors, staircase nosing illumination, txee dai khaub ncaws thiab wardrobe qws teeb pom kev zoo, txais tos accent daim ntaub ntawv. Daim ntawv txuas mus rau qhov twg tsis tu ncua linear illumination thiab lub cev durability cuam tshuam.
Kev saib xyuas kev noj qab haus huv thiab chav huv ib puag ncig muaj cov khoom siv tshwj xeeb. NSF / ANSI kev ua raws cai, tshuaj tiv thaiv rau cov neeg ua haujlwm tu, thiab cov rooj sib dhos kaw uas tiv thaiv cov khoom sib xyaw ua ke rau cov khoom siv polycarbonate dua lwm txoj hauv kev uas yuav muaj cov kab mob sib kis hauv cov kab nrib pleb lossis qhov pores.
Cov chaw ua zaub mov ntxiv lwm txheej - tawg tiv thaiv tsis yog xaiv tau thaum tawg diffuser fragments tuaj yeem paug cov khoom. Qee qhov kev txiav txim plaub ntug txiav txim rau polycarbonate lossis xav kom muaj kev tiv thaiv thib ob rau cov teeb pom kev zoo hauv thaj chaw tuav zaub mov.
Thaum Acrylic tseem ua rau kev nkag siab
Acrylic tsis yog siv tau. Rau kev tiv thaiv sab hauv ib puag ncig qhov kev tsim txom lub cev tsis zoo, PMMA qhov kev ruaj ntseg UV zoo dua thiab kev sib kis ntau dua tuaj yeem ua pov thawj qhov tshwj xeeb. Tsev khaws puav pheej teeb pom kev zoo, siab -kawg thaj chaw, tswj kev lag luam ib puag ncig. Tus nqi sib txawv ntawm cov ntaub ntawv tau nqaim txaus uas qhov kev txiav txim siab hinges ntawm cov kev xav tau ua haujlwm ntau dua li pob nyiaj siv.
Kev txhawj xeeb txog kev tawg nrog acrylic yog tiag tiag tab sis qee zaum overstated. Kev teeb tsa kom zoo diffuser profiles nyob rau hauv daim ntawv thov qab nthab ntsib qhov kev pheej hmoo tsis zoo thaum siv ib txwm. Cov lus qhia tshwj xeeb yuav tsum sib phim qhov kev tsim txom profile ntawm ib puag ncig, tsis yog qhov kev xav phem tshaj plaws. Tshaj - qhia txog polycarbonate qhov twg acrylic suffices nkim nyiaj txiag qhov project.
Kev Tshawb Fawb thiab Kev Tshawb Fawb Zoo
Kev ua lag luam muaj qhov sib txawv ntawm qhov zoo. Premium extruded diffusers los ntawm European thiab North American manufacturers piv rau cov khoom Asian ntau lawm -ob qho tib si muaj nyob rau ntawm cov nqi sib txawv nrog cov hnab ntawv sib txawv. Cov ntaub ntawv pov thawj, cov npe UL, cov ntsiab lus yellowness Performance index, thiab cov txiaj ntsig kev sib kis tiag tiag cais cov kws tshaj lij- qib cov khoom lag luam los ntawm cov khoom lag luam uas zoo ib yam.
Thov cov qauv ua ntej ntim khoom. Ntsuas qhov sib txawv ntawm qhov muag pom, haum rau hauv cov kab ke sib txuas, thiab txiav qhov zoo ntawm cov npoo. A 15% tus nqi sib txawv uas muab cov khoom siv zoo ib yam yeej cov khoom pheej yig uas sib txawv batch rau batch.
Yam tsawg kawg nkaus txiav txim kom muaj nuj nqis rau kev cai profiles feem ntau pib ib ncig ntawm 300kg ntawm cov khoom - txaus rau ob peb puas meters ntawm extrusion nyob ntawm qhov ntev profile. Tshuag profiles npog feem ntau cov ntawv thov yam tsis muaj kev cai cuab yeej peev.
Kev xav zaum kawg
Polycarbonate diffusing profiles rau LED sawb daim ntaub ntawv sawv cev rau cov cuab yeej paub tab ntawm qhov no. Cov khoom siv kho qhov muag, cov khoom siv science, thiab cov txheej txheem tsim khoom tau nkag siab zoo. Kev ua tsis tiav hauv thaj chaw feem ntau taug qab cov lus qhia yuam kev- cov khoom siv tsis raug rau ib puag ncig, kev tswj xyuas thermal tsis txaus ntawm LED sawb nws tus kheej, lossis teeb meem kev teeb tsa txhua yam - dua li cov khoom siv tsis raug.
Rau feem ntau kev lag luam thiab kev siv vaj tse uas xav tau diffused linear LED teeb pom kev zoo nrog lub cev ruaj khov, polycarbonate tseem yog qhov kev pom zoo ua ntej. Cov rooj plaub ntug tsis tshua nyiam cov khoom siv hloov pauv tsis hloov txoj cai dav dav. Xaiv qhov tsim nyog diffuser haze theem rau cov nti-rau- npog geometry, txheeb xyuas cov nplaim hluav taws xob ua raws li txoj cai lij choj, lees paub UV stabilization yog tias muaj kev cuam tshuam sab nraum zoov, thiab phim qhov diffuser qhov ntev rau koj cov channel. Txhua yam yog lwm yam kev ua tiav.