Microsphere-based retroreflective articles with en

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专利名称：Microsphere-based retroreflective articles

with enhanced retroreflective brightness

发明人：Kuney, Clark G., Jr., c/o Minnesota Mining

and

申请号：EP90305729.7申请日：19900525公开号：EP0399841A2公开日：19901128

专利附图：

摘要：Microsphere-based retroreflective articles having exceptionally high

retroreflective brightness, particularly at divergence angles of up to 0.5° may be made by

selection of microspheres having defined combinations of average diameter and averagerefractive index.

申请人：MINNESOTA MINING AND MANUFACTURING COMPANY

地址：3M Center, P.O. Box 33427 St. Paul, Minnesota 55133-3427 US

国籍：US

代理机构：Baillie, Iain Cameron

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