Polymer multilayer optical film with linear trapezoidal thickness structure and manufacturing method thereof

Abstract

The invention discloses a polymer multiplayer optical film with a linear trapezoidal thickness structure and a manufacturing method thereof. The polymer multilayer optical film comprises n first optical film layers and m second optical film layers, wherein the first optical film layers are made of a polymer A; the second optical film layers are made of a polymer B; the polymer A and the polymer B have different refractive indexes; the n first optical film layers and the m second optical film layers are laminated alternately layer by layer; the thicknesses of the n first optical film layers increase layer by layer in a linear gradient way along an overlapping direction; the thicknesses of the m second optical film layers increase layer by layer in a linear gradient way along an overlapping direction; the polymer multilayer optical film is obtained by adopting a bidirectional extension technology. By adopting the polymer multilayer optical film with the linear trapezoidal thickness structure, bandwidth reflection can be performed selectively; for example, infrared light of a certain bandwidth is reflected, ultraviolet light is reflected fully, and visible light is reflected fully. The polymer multilayer optical film is simple in manufacturing process, is low in cost, and can be widely applied in the fields of agricultural plastic tents, automobile window films, building window films and liquid crystal display brightening films.

Description

technical field [0001] The invention relates to the technical field of polymer multilayer optical films, in particular to a polymer multilayer optical film with a linear gradient thickness structure and a manufacturing method. Background technique [0002] In the actual application process, most of the commonly used optical films are optical coatings. Optical coating materials mainly include metal films and dielectric films. Optical films with better optical effects have relatively high requirements on the purity of coating materials, thickness and uniformity of coatings. High, so its price is relatively expensive, the production process is complicated, the process requirements are high, and the production cost is high, which is not conducive to industrialization and large-scale production. [0003] Polymer optical films are more and more widely used in daily life, industry and scientific research because of their excellent performance, light weight, easy processing, non-cor...

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Problems solved by technology

[0002] In the actual application process, most of the commonly used optical films are optical coatings. Optical coating materials mainly include metal films and dielectric films. Optical films with better optical effects have relatively high requirements on the purity of coating materials, thickness and uniformity of coatings. High, so its price is relatively expensive, the production process is complicated, the process requirements are high, and the production cost is high, which is not conducive to industrialization and large-scale production

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