| LI Hai-kuan,YANG Pei-xiang,ZOU Yao-bang,XU Gang.Preparation of RFID Anti-interference Coating and Its Effects on Anti-interference[J],47(3):135-139 |
| Preparation of RFID Anti-interference Coating and Its Effects on Anti-interference |
| Received:November 11, 2017 Revised:March 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.03.022 |
| KeyWord:RIFD anti-interference alloy vacuum coating coating thickness reading distance |
| Author | Institution |
| LI Hai-kuan |
Sichuan Yibin Plastic Packaging Materials Co. Ltd, Yibin , China |
| YANG Pei-xiang |
Sichuan Yibin Plastic Packaging Materials Co. Ltd, Yibin , China |
| ZOU Yao-bang |
Sichuan Yibin Plastic Packaging Materials Co. Ltd, Yibin , China |
| XU Gang |
Sichuan Yibin Plastic Packaging Materials Co. Ltd, Yibin , China |
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| Abstract: |
| The work aims to apply RFID technology to the field of metal-alike packaging area, study a preparation technology of RFID interference-free metal coating, and investigate effects of thickness of anti-interference coating on identifiable reading distance of RFID tags. By taking advantage of such metal features as indium-tin alloy (indium-tin mass ratio of 1:9 and 2:8) or pure indium (over 99.9% indium content), a nearly 200~300 nm thick RFID anti-interference metal coating was obtained by adopting such processing technologies as pre-treating plastic surfaces, spraying UV undercoats, vacuum vapor coatings, and spraying UV finishing coats. Formation process of RFID anti-interference coating in island mode was analyzed by adopting scanning electron microscope and vacuum vapor coating principle. RFID tag was closely pasted on the surface of anti-interference metal coating, and detectable identification distance of RFID tag on different anti-interference alloy coating surfaces was tested with Voyantic RFID tag test system and handheld RFID reader, respectively. Special RFID reader could identify and read the RFID anti-interference metal coating as-prepared in aforementioned method pasted with RFID tag with chip frequency of 920~925 MHz. Detectable reading distance of the RFID tag as measured with the Voyantic RFID tag test system was 68.0~83.0 cm, and that as measured with the handheld RFID reader was 28.0~33.2 cm. Coating thickness had certain effects on detectable reading distance. As plating times increased, thickness of alloying metal coating increased while the detectable reading distance of RFID tag decreased gradually. For some alloys, the detectable reading distance of RFID tag was nearly zero when the thickness of alloying metal reached certain level. The work effectively solves the problem of RFID technique’s metal interference, which allows RFID technique to function normally in the field of metal-alike packaging. |
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