Dab tsi yog qhov tseem ceeb ntawm cov khoom kuaj rau cov desiccant RoHS daim ntawv xeem? Vim li cas lub desiccant tsis muaj DMF? Vim li cas koj thiaj yuav tsum ua raws li RoHS cov cai?
Cov khoom siv desiccant tsim thiab muag los ntawm Chunwang tsis muaj DMF cov tshuaj lom neeg, ua raws li RoHS cov cai, thiab ua raws li cov cai xa tawm. Chunwang cov khoom raug kuaj los ntawm peb lub tuam txhab kuaj SGS, thiab cov txiaj ntsig tau muaj tseeb thiab siv tau. Tom qab tus neeg yuav khoom yuav khoom, tus neeg muag khoom tuaj yeem tau txais daim ntawv pov thawj thib peb ntawm SGS kuaj los ntawm cov neeg ua haujlwm muag khoom. Cov khoom xeem yog raws li nram no:
Txwv tsis pub muaj tshuaj lom:
Heavy hlau:
- Cov hmoov lead;
- mercury;
- cadmium;
- Chromium (VI) hexavalent chromium.
Qee qhov brominated nplaim retardants:
-Polybrominated biphenyls (PBB's)
Polybrominated biphenyls:
-Polybrominated diphenyl ethers (PBDE's)
Polybrominated diphenyl ether
Qhov ntsuas qhov siab tshaj plaws yog:
Cadmium: 0.01% (100 ppm);
Lead, mercury, hexavalent chromium, polybrominated biphenyls, polybrominated diphenyl ethers: 0.1% (1000 ppm).
RoHS Cov Lus Qhia txwv tsis pub siv rau 6 pawg hauv qab no ntawm cov khoom phom sij:
1. Lead (Pb) Piv txwv ntawm kev siv cov khoom no: solder, iav, PVC stabilizer
2. Mercury (Hg) (mercury) Piv txwv ntawm kev siv cov khoom no: cov ntsuas cua sov, cov sensors, cov keyboards thiab relays, qhov muag teev
3. Cadmium (Cd) Piv txwv ntawm kev siv cov khoom no: keyboards, springs, connectors, vaj tse thiab PCBs, tiv tauj, roj teeb
4. Hexavalent chromium (Cr 6+ ) Piv txwv ntawm kev siv cov khoom no: hlau nrog corrosion txheej
5. Polybrominated biphenyls (PBB) Piv txwv ntawm kev siv cov khoom no: PCB, connectors, yas vaj tse
6. Polybrominated diphenyl ether (PBDE) Piv txwv ntawm kev siv cov khoom no: nplaim taws, PCB, connector, yas casing yog dab tsi?
DMF yog dab tsi? Dimethyl fumarate yog abbreviated li DMF. Nws muaj cov tshuaj toxicity tsawg (LD_(50) nas yog qhov ncauj 2240 mg / kg), ua haujlwm siab, broad-spectrum antibacterial, thiab muaj cov tshuaj tua kab mob tshwj xeeb rau pwm. Nws tuaj yeem siv rau pwm, qhob cij, pub, tshuaj pleev ib ce, ntses, nqaij, zaub thiab txiv hmab txiv ntoo. Cov nyhuv anti-mildew ntawm DMF ntawm qhob cij yog zoo dua li ntawm calcium propionate. Raws li kev tshawb fawb hauv tsev, DMF muaj peev xwm tiv thaiv kab mob zoo, thiab cov tshuaj tua kab mob ntawm cov khoom noj yog zoo dua li cov tshuaj tiv thaiv kab mob xws li propionate, sorbic acid thiab benzoic acid, thiab ntau cov pwm hauv PDA nruab nrab uas muaj 500-800ppm. Cov kab mob ua kom tiav inhibitor.
EU tus cwj pwm ntawm DMF: Thaum Lub Ib Hlis 29, 2009, EU cov tswvcuab hauv lub xeev tau txais tsab ntawv daws teeb meem "Lus lees tias cov neeg siv khoom lag luam uas muaj dimethyl fumarate yuav tsis raug muab tso rau hauv European lag luam", uas tau pib siv rau lub Tsib Hlis 1, 2009. Daim ntawv qhia meej meej hais tias yog cov ntsiab lus ntawm dimethyl fumarate nyob rau hauv cov neeg siv khoom los yog qhov chaw ntawm no ntau tshaj 0.1 mg / kg, los yog yog hais tias cov khoom nws tus kheej tau tshaj tawm nws cov ntsiab lus dimethyl fumarate, nws yuav raug suav hais tias yog "muaj fumaric acid". Cov khoom ntawm dimethyl esters yuav raug txwv tsis pub nkag mus rau EU ua lag luam rau kev ncig thiab muag.
Dimethyl fumarate (DMF) feem ntau yog siv los ua cov tshuaj tua kab mob thiab tiv thaiv kab mob, thiab feem ntau yog siv hauv kev tsim, khaws cia thiab kev thauj mus los ntawm tawv, khau thiab textiles. Txawm li cas los xij, txij li lub Kaum Hli xyoo tas los, EU tau tshaj tawm ntau qhov xwm txheej ntawm cov tawv nqaij ua xua, mob eczema thiab kub hnyiab los ntawm cov neeg siv khoom raug rau cov khau uas muaj dimethyl fumarate, tawv sofas, thiab lwm yam, uas tau nyiam dav. EU kuj tau tshawb fawb thiab tshuaj xyuas txij thaum ntawd los, thiab thaum kawg tau qhia txog cov qauv saum toj no thiab cov qauv txwv. Ua ntej kev pom zoo los ntawm EU tsab cai, Fabkis thiab Belgium tau siv cov kev ntsuas tshwj xeeb los txwv kev ntshuam thiab muag cov khau thiab cov rooj zaum uas muaj dimethyl fumarate. Spain kuj tau tshaj tawm cov kev cai txwv tsis pub cov khoom lag luam uas tuaj yeem tiv nrog daim tawv nqaij los ntawm kev muaj dimethyl fumarate. Ntxiv mus, txij li thaum xaus ntawm lub xyoo tas los, ib tug xov tooj ntawm cov khoom Suav tau raug ntes los ntawm Fabkis thiab lwm lub teb chaws vim muaj ntau dhau ntawm dimethyl fumarate. Dimethyl fumarate yog siv dav hauv cov khoom siv hauv tsev. Cov khau khau, cov rooj tog tawv tawv thiab cov khoom siv hauv tsev ntau heev yuav muab tso rau hauv pob khoom nrog cov hnab ntim dej noo uas muaj cov khoom xyaw rau kev tiv thaiv kev ya raws thiab mildew. Hauv Suav teb, cov khoom siv tawv hauv Wenzhou thiab Haining yog cov khoom lag luam tawm txawv teb chaws. Hauv Wenzhou ib leeg, kev xa tawm ntawm cov khoom khau hauv xyoo 2008 mus txog 276 lab US las. Textiles yog Zhejiang's export-oriented khoom, nrog rau ib xyoos twg export ntim ntawm txog 40 billion. Cov khoom lag luam tau hais los saum toj no suav nrog feem ntau ntawm EU kev ua lag luam. Dab tsi yog qhov kev txhawj xeeb ntau dua yog tias raws li cov ntaub ntawv, dimethyl fumarate yog siv dav hauv cov khoom noj khoom haus, khoom noj, pub, thiab lwm yam vim nws tsis muaj tshuaj lom, muaj peev xwm tiv thaiv kab mob, muaj ntau yam tshuaj tua kab mob thiab kev tiv thaiv ib puag ncig. Tshuaj pleev ib ce, haus luam yeeb thiab lwm yam kev tiv thaiv corrosion thiab mildew preservation, yog li ntawd, lub European Union txwv tsis pub rau tag nrho cov neeg siv khoom uas muaj dimethyl fumarate yuav inevitably coj tej yam tsis zoo tshwm sim rau cov lag luam uas cuam tshuam nyob rau hauv peb lub xeev.
Tau ntsib nrog qhov kev sib tw loj ntawm kev txiav npluav, lub chaw saib xyuas thiab cais tawm tau ceeb toom rau cov lag luam xa tawm kom hloov kho raws sijhawm thiab hloov mus rau ntau tus phooj ywg ib puag ncig thiab noj qab haus huv cov khoom pov thawj thiab cov kab mob mildew-pov thawj kom tau raws li cov cai ntawm cov qauv thiab nquag sib txuas lus nrog txawv teb chaws. cov neeg siv khoom kom txo cov cua ntsawj ntshab. Qhov cuam tshuam ntawm cov khoom xa tawm. Tsis ntev los no, lub tuam tsev tshuaj xyuas thiab cais tawm kuj tseem yuav ntxiv dag zog rau kev tshuaj xyuas thiab kev saib xyuas ntawm cov tuam txhab muaj feem cuam tshuam hauv nws txoj kev txiav txim siab los tiv thaiv cov khoom tsis tsim nyog los ntawm kev xa mus rau EU. Yog li ntawd, Chunwang cov khoom siv desiccant tsis muaj DMF thiab tuaj yeem dhau RoHS kev txiav txim xa tawm, uas tuaj yeem zam kev poob ntawm cov neeg siv khoom cov khoom rau EU, ua rau muaj kev lag luam zoo thiab muaj koob npe nrov.
