发明名称 |
METHOD OF MAKING A PRIVACY FILM |
摘要 |
The present invention pertains to privacy film that can be used with documents. The privacy film has a light transmissive, polymeric base sheet that has opposing first and second surfaces. A plurality of light directing elements protrudes from the first surface of the base sheet. The base sheet can be constructed of a first polymeric material. The light directing elements can be constructed of a second polymeric material. The first and second polymeric material may be the same material. The light directing elements are substantially constant in its cross-section dimension and disposed substantially parallel to each other. |
申请公布号 |
EP1943075(A4) |
申请公布日期 |
2011.05.04 |
申请号 |
EP20060825987 |
申请日期 |
2006.10.13 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
GRAHAM, PAUL D.;CLARKE, GRAHAM M. |
分类号 |
B32B27/00;B29C59/02;B32B1/00;G02B5/00 |
主分类号 |
B32B27/00 |
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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