公开(公告)号：EP1369224A1

公开(公告)日：2003-12-10

申请号：EP03011341.9

申请日：2003-05-19

申请人： Atofina

发明人： Reilly, Jack Joseph ,  Keating, Paul Joseph ,  Dirkx, Ryan Richard

IPC分类号： B32B7/02 ,  B32B5/16 ,  G09F13/04

CPC分类号： C09K17/52 ,  B32B5/16 ,  B32B7/02 ,  Y10S428/917 ,  Y10T428/24942 ,  Y10T428/249921 ,  Y10T428/254 ,  Y10T428/26

摘要： Disclosed is a polished translucent co-extruded sheet having utility as a light diffusing protective cover or sign face for light emitting diode (LED) light sources and other purposes. The sheet is comprised of (a) a particle layer containing particles having a mean particle size of about 4 to 100 microns and having a particle size distribution of between 1-110 microns, at a loading of 1 to 60% melt blended with a thermoplastic matrix, wherein the particle and matrix have refractive indices that differ by greater than 0.001 units of each other when measured in conformance with ASTM D 542; and (b) at least one substrate layer comprised of thermoplastic compositions, wherein the substrates have a refractive index within 0.2 units of the refractive index of the particle layer matrix when measured in conformance with ASTM D 542.

摘要翻译： 公开了一种抛光的半透明共挤出片材，其具有用作发光二极管（LED）光源和其它目的的光漫射保护盖或符号面。 片材由（a）含有平均粒径为约4至100微米并且具有1-110微米的粒度分布的颗粒的颗粒层，以1至60％的熔融共混与热塑性塑料 基体，其中当根据ASTM D 542测量时，所述颗粒和基质的折射率彼此相差大于0.001个单位; 和（b）由热塑性组合物组成的至少一个基材层，其中当根据ASTM D 542测量时，基材的折射率在颗粒层基质的折射率的0.2单位内。