发明名称 |
PRISMATIC RETROREFLECTIVE ARTICLE AND METHOD |
摘要 |
A prismatic retroreflective article has a transparent body portion and a layer of internally reflecting cube-corner optical elements having an open air-exposed rear surface at least a portion of which is more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical element. The article may be made by providing a transparent body portion bearing a layer of internally reflecting open air-exposed cube-corner optical elements; treating or coating at least a portion of the cube-corner elements to make the treated or coated portion more hydrophobic, more oleophobic, or both more hydrophobic and more oleophobic than the underlying cube-corner optical elements; and leaving such treated or coated portion exposed to the open air. |
申请公布号 |
EP1831734(A1) |
申请公布日期 |
2007.09.12 |
申请号 |
EP20050853205 |
申请日期 |
2005.12.06 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
BACON, CHESTER A. JR.;KIRK, SETH M.;DAVID, MOSES M.;CURRENS, MICHAEL, D.;OWUSU, OSEI A. |
分类号 |
G02B5/124;E01F9/615 |
主分类号 |
G02B5/124 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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