Diffuse-reflection brightness enhancement film and preparation method thereof
A technology of diffuse reflection and brightness enhancement film, applied in optics, instruments, optical components, etc., can solve the problems that the brightness enhancement film cannot be achieved, unfavorable to simplify production, adverse environmental effects, etc., to increase the light mixing effect, avoid light and shadow, increase The effect of the brightening effect
Active Publication Date: 2014-05-28
NINGBO DXC NEW MATERIAL TECH
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Abstract
A diffuse-reflection brightness enhancement film comprises a PET (polyethylene terephthalate) base film, wherein a PETG (polyethylene terephthalate glycol) layer is composited on the PET base film, a plurality of rows of arc-shaped bulges are arranged on the surface of the PETG layer, and bulge points are arranged on each row of arc-shaped bulges. A preparation method of the diffuse-reflection brightness enhancement film comprises the steps as follows: firstly, a mold pressing base film is prepared, wherein preparation of the mold pressing base film comprises the steps as follows: A, a PETG raw material is fed into an extruder and extruded in a melted manner; B, a PET raw material is fed into the other extruder and extruded in a melted manner; C, the PETG raw material and the PET raw material are melted and then pass through a co-extrusion mold head, and a casting piece is formed on a quenching roller; D, the casting piece is stretched longitudinally after being preheated; E, the piece stretched longitudinally is preheated again and then stretched transversely; and F, the mold pressing base film is obtained after thermoforming and cooling of the piece stretched transversely; and the mold pressing base film is mounted into a mold press for mold pressing after being obtained. Co-extrusion and mold pressing methods are adopted, so that the production speed is increased greatly, various defects in a coating process are avoided, and the yield is increased.
Application Domain
Optical elements
Technology Topic
QuenchingPolyethylene terephthalate glycol +7
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