Sheet for LED light cover application

摘要

Disclosed herein is a sheet comprising a polymeric material; light diffusing particles disposed in the polymeric material; and a non-random surface texture on a surface of the sheet; wherein the surface texture comprises hemispherical structures, partial hemispherical structures, ellipsoidal structures, immersed spherical beads, ellipsoidal beads, “bell-shape” bump, complex lens shape structures, pyramidal structures, reversed pyramidal structures, or combinations comprising at least one of the foregoing. The sheet has excellent hiding power and transmission at the same time and is suitable for LED light cover applications. The unit structures have an aspect ratio of 0.15 to 0.5 and a pitch of greater than or equal to 100 μm.

主权项

1. A sheet comprising:
a polymeric material; light diffusing particles disposed in the polymeric material; and a non-random surface texture formed from unit structures on a surface of the sheet; wherein the surface texture comprises hemispherical structures, partial hemispherical structures, ellipsoidal structures, immersed spherical beads, ellipsoidal beads, “bell-shape” bump, complex lens shape structures, pyramidal structures, reversed pyramidal structures, or combinations comprising at least one of the foregoing;wherein the unit structures have an aspect ratio of 0.15 to 0.5 and a pitch of greater than or equal to 100 μm;
wherein the light diffusing particles are present in an amount of 0.2% to 0.8% by weight based on a total weight of the sheet and wherein the sheet is a monolithic sheet and has a thickness of 0.5 mm to 4 mm.