1. Kev xaiv cov khoom siv hluav taws xob nrawm nrawm rau kev kuaj mob
Lo lus nug no tuaj yeem nkag siab tau tias yog dab tsi kev laus yuav tsum tau simulated. Thaum siv cov ntaub ntawv polymer, ntau yam hauv huab cua ib puag ncig yuav cuam tshuam rau kev laus ntawm cov ntaub ntawv polymer. Yog tias lub ntsiab tseem ceeb ua rau kev laus paub ua ntej, txoj kev sim tuaj yeem xaiv tau raws li lub hom phiaj.
Peb tuaj yeem txiav txim siab txoj kev sim los ntawm kev txiav txim siab txog kev thauj mus los, kev cia khoom, siv ib puag ncig thiab kev laus ntawm cov khoom siv. Piv txwv li, nruj polyvinyl chloride profiles yog ua los ntawm polyvinyl chloride ua raw khoom thiab ntxiv nrog additives xws li stabilizers thiab pigments. Lawv feem ntau yog siv sab nraum zoov. Xav txog cov txheej txheem kev laus ntawm PVC, PVC yog yooj yim rau decompose thaum rhuab; xav txog kev siv ib puag ncig, oxygen, ultraviolet lub teeb, cua sov thiab noo noo nyob rau hauv cov huab cua yog tag nrho cov ua rau ntawm profile aging.
Yog li ntawd, lub teb chaws tus qauv GB/T8814-2004 "Unplasticized polyvinyl chloride (PVC-U) profiles rau lub qhov rooj thiab qhov rais" tsis tsuas yog stipulates lub photooxygen laus xeem txoj kev, tab sis kuj txais GB / T16422.2 "Plastic Laboratory Light Source Kev Ntsuas Kev Ntsuas" Ntu 2 ntawm txoj kev: Xenon arc teeb kev laus rau 4000h lossis 6000h, simulating yam xws li sab nraum zoov ultraviolet lub teeb thiab pom lub teeb, kub, av noo, nag, thiab lwm yam, thiab tseem hais txog cov khoom thermal oxygen aging: xeev tom qab cua sov , muab tso rau ntawm 150 degree rau 30 feeb, kev soj ntsuam xyuas seb puas muaj npuas, tawg, pitting lossis sib cais los tshuaj xyuas qhov kub ntawm qhov profile. Lwm qhov piv txwv yog cov khoom lag luam uas kuv lub teb chaws muaj kev sib tw hauv kev lag luam thoob ntiaj teb: kev lag luam txawv teb chaws export khau. Thaum siv, ultraviolet rays nyob rau hauv tshav ntuj yog lub ntsiab ua rau discoloration thiab fading ntawm nkawm khau. Yog li ntawd, nws yog ib qho tsim nyog yuav tau siv lub thawv UV teeb los kuaj lawv cov yellowing kuj.
Feem ntau siv khau yellowing resistance test chamber siv 30W UV teeb. Cov qauv yog 20cm deb ntawm lub teeb ci. Kev hloov xim yog pom tom qab 3 teev ntawm qhov raug. Nyob rau tib lub sijhawm, thaum lub sijhawm thauj mus los, qhov kub, av noo thiab qhov hnyav nyob hauv lub thawv yuav ua rau muaj xim tsis zoo, me ntsis, thiab txawm tias khau khau, khau khiab, thiab cov kua nplaum. Yog li ntawd, ua ntej ua zaub mov xa tuaj, nws yuav tsum tau txiav txim siab ua qhov ntsuas kub thiab av noo tiv thaiv kev laus los simulate qhov kub thiab txias ib puag ncig hauv lub thawv. Nyob rau hauv cov xwm txheej ntawm 70 degree thiab 95% txheeb ze av noo, soj ntsuam qhov tsos thiab xim hloov tom qab 48 teev ntawm kev sim.
2. Kev xaiv lub teeb pom kev zoo rau kev kuaj kev laus kom nrawm
Laboratory light source test test: Nws tuaj yeem simulate lub teeb, oxygen, cua sov, dej nag thiab lwm yam hauv cov huab cua pom ib puag ncig hauv chav kuaj. Nws yog ib qho uas nquag siv dag zog ua kom muaj kev laus txoj kev sim. Ntawm cov simulation yam, lub teeb qhov chaw yog qhov tseem ceeb. Kev paub qhia tau hais tias cov wavelengths nyob rau hauv tshav ntuj uas ua rau puas tsuaj rau cov ntaub ntawv polymer yog feem ntau concentrated nyob rau hauv ultraviolet lub teeb thiab ib co pom lub teeb.
Cov khoom siv hluav taws xob tam sim no siv zog ua kom lub zog spectrum faib nkhaus nyob rau hauv qhov kev sib tw wavelength ze rau hnub ci spectrum. Simulation thiab acceleration tus nqi yog lub hauv paus tseem ceeb rau xaiv cov khoom siv hluav taws xob. Tom qab li ntawm ib puas xyoo ntawm txoj kev loj hlob, lub chaw soj nstuam lub teeb muaj xws li kaw carbon arc teeb, hnub ci hom carbon arc teeb, fluorescent ultraviolet teeb, xenon arc teeb, high-pressure mercury teeb thiab lwm yam teeb pom kev zoo xaiv los ntawm. Cov pab pawg kws tshaj lij ntsig txog cov khoom siv polymer hauv International Organization for Standardization (ISO) feem ntau pom zoo kom siv peb lub teeb: hnub ci carbon arc teeb, fluorescent ultraviolet teeb, thiab xenon arc teeb.
01. Xenon arc teeb
Nws yog tam sim no ntseeg hais tias lub zog spectral faib ntawm xenon arc teeb ntawm cov paub lub teeb pom kev zoo tshaj plaws zoo ib yam li ultraviolet thiab pom qhov chaw ntawm lub hnub ci. Los ntawm kev xaiv cov lim kom tsim nyog, feem ntau ntawm cov hluav taws xob luv luv tam sim no nyob rau hauv tshav ntuj mus txog hauv av tuaj yeem lim tawm. Xenon teeb muaj hluav taws xob muaj zog hauv thaj tsam infrared ntawm 1000nm ~ 1200nm thiab tsim kom muaj cua sov ntau.
Yog li ntawd, yuav tsum tau xaiv ib lub tshuab cua txias kom tshem tawm lub zog no. Tam sim no, muaj ob txoj hauv kev txias rau xenon teeb aging test khoom ntawm lub khw: dej-txias thiab cua-txias. Feem ntau hais lus, cov nyhuv txias ntawm cov dej txias xenon teeb yog zoo dua li cov cua txias. Nyob rau tib lub sij hawm, tus qauv yog complex thiab tus nqi yog kim dua. Txij li thaum lub zog ntawm ultraviolet ib feem ntawm lub teeb xenon nce tsawg dua li ob lub teeb pom kev zoo, nws yog qhov qis tshaj ntawm cov nqi nrawm.
02. Fluorescent UV teeb
Txoj kev xav, lub zog luv ntawm 300nm ~ 400nm yog qhov tseem ceeb ua rau kev laus. Yog tias lub zog no nce ntxiv, kev sim sai tuaj yeem ua tiav. Lub spectral spectral faib ntawm fluorescent UV teeb yog feem ntau yog concentrated nyob rau hauv lub ultraviolet ib feem, yog li nws muaj peev xwm ua tau ntau dua acceleration.
Txawm li cas los xij, fluorescent UV teeb tsis tsuas yog ua kom lub zog ultraviolet nyob rau hauv ntuj tshav ntuj, tab sis kuj radiate lub zog uas tsis muaj nyob rau hauv ntuj tshav ntuj thaum ntsuas nyob rau hauv lub ntiaj teb nto, thiab lub zog no yuav ua rau unnatural kev puas tsuaj. Tsis tas li ntawd, tshwj tsis yog cov kab mercury spectral nqaim heev, lub teeb fluorescent tsis muaj lub zog siab dua 375nm, yog li cov ntaub ntawv uas nkag siab rau lub zog ntev dua UV lub zog yuav tsis hloov raws li lawv ua thaum raug tshav ntuj. Cov kev tsis zoo no tuaj yeem ua rau cov txiaj ntsig tsis txaus ntseeg.
Yog li ntawd, fluorescent UV teeb tsis zoo simulated. Txawm li cas los xij, vim nws qhov nrawm nrawm, kev tshuaj xyuas sai ntawm cov ntaub ntawv tshwj xeeb tuaj yeem ua tiav los ntawm kev xaiv hom teeb pom kev zoo.
03. Hnub ci carbon arc teeb
Hnub ci-hom carbon arc teeb tam sim no tsis tshua siv nyob rau hauv peb lub teb chaws, tab sis lawv tau siv dav siv lub teeb hauv Nyiv. Feem ntau JIS cov qauv siv lub hnub ci-hom carbon arc teeb. Ntau lub tuam txhab tsheb hauv kuv lub tebchaws uas koom tes nrog Nyij Pooj tseem pom zoo kom siv lub teeb ci no. Lub zog spectral faib ntawm lub hnub ci carbon arc teeb tseem nyob ze rau ntawm lub hnub ci, tab sis cov kab hluav taws xob ultraviolet los ntawm 370nm mus rau 390nm yog concentrated thiab ntxiv dag zog. Lub simulation tsis zoo li lub teeb xenon, thiab tus nqi nrawm yog nruab nrab ntawm lub teeb xenon thiab lub teeb ultraviolet.
3. Kev txiav txim siab ntawm cov khoom siv dag zog nrawm rau lub sijhawm kuaj
1. Xa mus rau cov qauv khoom thiab cov kev cai uas cuam tshuam
Cov qauv khoom tsim nyog tau teev tseg lub sijhawm rau kev kuaj kev laus. Peb tsuas yog yuav tsum nrhiav cov qauv tsim nyog thiab ua raws li lub sijhawm teev nyob rau hauv. Ntau lub teb chaws cov qauv thiab cov qauv kev lag luam tau teev tseg qhov no.
2. Kev xam raws li kev sib raug zoo
Kev tshawb fawb qhia tau hais tias cov xim ruaj khov ntawm ABS yog ntsuas los ntawm kev hloov xim thiab yellowing Performance index. Artificial accelerated aging muaj kev sib raug zoo nrog ntuj atmospheric exposure, thiab acceleration tus nqi yog hais txog 7. Yog hais tias koj xav paub cov xim hloov ntawm ib yam khoom ABS tom qab ib xyoos ntawm kev siv sab nraum zoov thiab siv tib yam kev xeem, koj tuaj yeem xa mus rau acceleration rate los txiav txim lub sij hawm aging 365x24/7=1251h.
Tau ntev, ntau txoj kev tshawb fawb tau ua tiav ntawm cov teeb meem kev sib raug zoo hauv tsev thiab txawv teb chaws, thiab ntau yam kev hloov pauv kev sib raug zoo tau muab los. Txawm li cas los xij, vim muaj ntau haiv neeg ntawm cov ntaub ntawv polymer, qhov sib txawv ntawm cov cuab yeej ntsuas kev laus thiab cov txheej txheem, thiab qhov sib txawv ntawm kev nyab xeeb ntawm cov sij hawm sib txawv thiab cheeb tsam, kev sib raug zoo hloov dua siab tshiab yog qhov nyuaj. Yog li ntawd, thaum xaiv qhov kev hloov dua siab tshiab kev sib raug zoo, peb yuav tsum tau them sai sai rau cov ntaub ntawv tshwj xeeb, cov khoom siv laus, cov kev sim ntsuas, cov ntsuas ntsuas kev ua tau zoo thiab lwm yam uas ua rau muaj kev sib raug zoo.
3. Tswj tag nrho cov nyiaj ntawm cov khoom siv hluav taws xob nrawm nrawm kom sib npaug rau tag nrho cov hluav taws xob raug hluav taws xob
Rau qee cov khoom lag luam uas tsis muaj cov qauv sib xws thiab tsis muaj kev siv rau kev sib raug zoo, cov hluav taws xob siv hluav taws xob ntawm qhov chaw siv tiag tiag tuaj yeem raug txiav txim siab, thiab tag nrho cov nqi hluav taws xob hluav taws xob nrawm nrawm yuav tsum raug tswj kom sib npaug rau tag nrho cov hluav taws xob raug hluav taws xob. .
Piv txwv li: Yuav ua li cas tswj tag nrho cov hluav taws xob hluav taws xob ntawm cov khoom siv hluav taws xob nrawm nrawm
Ib yam khoom yas yog siv nyob rau hauv cheeb tsam Beijing, thiab nws yuav tsum tswj tag nrho cov hluav taws xob hluav taws xob ntawm cov khoom siv hluav taws xob nrawm nrawm kom sib npaug rau ib xyoos ntawm kev tawm sab nraud.
Kauj Ruam 1: Txij li cov khoom no yog cov khoom siv yas thiab siv sab nraum zoov, xaiv Txoj Kev A hauv GB / T16422.2-1996 "Plastic Laboratory Light Source Exposure Test Methods Part 2: Xenon Arc Lamp".
Cov kev sim ntsuas yog: irradiation siv 0.50W / m2 (340nm), blackboard kub 65 degree, thawv kub 40 degree, txheeb ze av noo 50%, dej txau lub sij hawm / tsis muaj dej txau lub sij hawm 18min / 102min, nruam teeb;
Kauj Ruam 2: Tag nrho cov hluav taws xob txhua xyoo hauv Beijing yog li 5609MJ / m2. Raws li tus qauv thoob ntiaj teb CIENo85-1989 (GB/T16422.1-1996 "Plastic Laboratory Light Source Exposure Test Methods" rau kev sib piv cov spectral tis ntawm cov khoom siv hluav taws xob thiab lub hnub ci ntuj) Tshooj: Cited hauv "Xenon Arc Teeb"); ntawm cov cheeb tsam ultraviolet thiab pom (300nm ~ 800nm) suav txog 62.2%, lossis 3489MJ / m2.
Kauj ruam 3: Raws li GB/T16422.2-1996
Thaum lub 340nm irradiation siv yog 0.50W/m2, irradiation siv nyob rau hauv infrared thiab pom qhov chaw (300nm ~ 800nm) yog 550W/m2; lub sij hawm irradiation tuaj yeem xam raws li 3489X106/550=6.344X106s, uas yog 1762h. Raws li txoj kev suav no, qhov ua kom nrawm yog li 5. Txij li thaum ntuj tsim tsis yog ib qho yooj yim superposition ntawm irradiation siv, nws tsuas yog txiav txim siab tias hnub ci ua rau cov khoom siv.
4. Kev xaiv cov ntsuas ntsuas kev ua tau zoo rau cov khoom siv hluav taws xob nrawm nrawm
Kev xaiv ntawm cov ntsuas kev ntsuas kev ua tau zoo yog feem ntau txiav txim siab los ntawm ob yam: kev siv cov khoom siv thiab cov yam ntxwv ntawm cov khoom nws tus kheej.
1. Txheeb xyuas qhov ntsuas ntsuas raws li kev siv cov khoom siv. Rau cov khoom siv tib yam, vim nws txoj kev siv sib txawv, kev ntsuas ntsuas sib txawv tuaj yeem raug xaiv. Piv txwv li, yog tias tib cov xim siv rau kev kho kom zoo nkauj, qhov kev hloov ntawm nws cov tsos yuav tsum tau txiav txim siab. Hauv GB/T1766-1995 "Rating of Aging of Paint and Varnish Coatings", cov kev ntsuam xyuas rau ntau yam kev hloov pauv xws li gloss, xim hloov, chalking, thiab kub-tiav yog teev nyob rau hauv kom meej.
Rau qee cov txheej txheem ua haujlwm, xws li cov txheej txheem tiv thaiv corrosion, qee qhov kev hloov pauv ntawm cov xim thiab cov tsos mob tau txais. Lub sijhawm no, thaum xaiv cov ntsuas ntsuas, qhov tseem ceeb ntawm kev txiav txim siab yog nws qhov kev tiv thaiv tawg, qib ntawm hmoov, thiab lwm yam. Nws kuj yog polyvinyl chloride (PVC). Yog tias nws yog siv los ua cov khau saum toj, nws yuav tsum tau xav txog nws txoj kev tiv thaiv yellowing. Yog hais tias nws yog siv los nag downpipes, qhov yuav tsum tau rau cov tsos ntawm cov kev hloov pauv tsis siab, thiab lub cev thiab lub zog ntawm cov khoom siv hloov pauv, xws li rub lub zog tensile hloov yog qhov kev ntsuas tseem ceeb.
2. Txiav txim siab qhov ntsuas ntsuas raws li cov yam ntxwv ntawm cov khoom nws tus kheej. Rau tib cov khoom, cov khoom sib txawv poob ntawm qhov tsis sib xws thaum lub sij hawm kev laus. Hauv lwm lo lus, qee yam khoom muaj txiaj ntsig rau ib puag ncig thiab poob sai, uas yog qhov tseem ceeb ua rau cov khoom puas tsuaj. Thaum xaiv cov ntsuas ntsuas, cov khoom rhiab yuav tsum raug xaiv. Kev tshawb fawb qhia tau hais tias rau feem ntau engineering plastics, qhov cuam tshuam lub zog hloov pauv tau zoo heev thiab txo qis thaum lub sijhawm kuaj kev laus.
Yog li ntawd, thaum ua cov kev ntsuam xyuas kev laus ntawm engineering plastics, qhov tseem ceeb yuav tsum tau muab rau kev xaiv qhov cuam tshuam lub zog txo qis raws li qhov ntsuas ntsuas. Kev cuam tshuam lub zog kuj tseem ceeb heev rau kev laus ntawm polypropylene thiab yog qhov taw qhia tseem ceeb rau kev ntsuas kev laus. Rau cov khoom siv polyethylene, qhov txo qis hauv elongation ntawm kev tawg yog qhov pom tseeb dua thiab yog qhov tseem ceeb ntawm qhov ntsuas ntsuas. Rau polyvinyl chloride, ob qho tib si tensile lub zog thiab kev cuam tshuam lub zog txo qis sai, thiab ib qho ntawm lawv yuav tsum raug xaiv rau kev ntsuam xyuas raws li qhov tseeb.
Hauv lub teb chaws tus qauv GB/T8814-2004 "Unplasticized polyvinyl chloride (PVC-U) profiles rau lub qhov rooj thiab qhov rais", qhov cuam tshuam lub zog tuav tus nqi tom qab kev laus ntau dua los yog sib npaug rau 60% yog xaiv raws li qhov tsim nyog qhia; nyob rau hauv lub teeb kev lag luam tus qauv QB/T2480 -2000 Rigid polyvinyl chloride (PVC-U) cov kav dej nag thiab cov khoom siv rau kev tsim kho, lub zog tensile tuav tus nqi tom qab kev laus yog ntau dua los yog sib npaug li 80% raws li cov qauv tsim nyog.