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Sheet having uneven pattern formed thereon and method for production thereof

A technology of a concave-convex pattern and a manufacturing method, which are applied to the manufacture of backlight units, retardation plates, light diffusers, process sheet originals for light diffuser manufacturing, process sheets for optical element manufacturing, and anti-reflection bodies. Processing, not suitable for mass production, etc.

Active Publication Date: 2009-12-23
OJI PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is also difficult to process a wide area exceeding 30 cm, and there is a problem that it is not suitable for mass production

Method used

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  • Sheet having uneven pattern formed thereon and method for production thereof
  • Sheet having uneven pattern formed thereon and method for production thereof
  • Sheet having uneven pattern formed thereon and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0486] The Young's modulus of the following examples is a value measured based on JIS K 7113-1995 using a tensile tester (TE-7001 manufactured by TESTERSANGYO CO., LTD.). When there is no particular description of the temperature, it is a value at 23°C.

[0487] (Example 1)

[0488] A heat-shrinkable film made of polyethylene terephthalate (HISHIPET LX-60S manufactured by Mitsubishi Plastic, Inc.) with a thickness of 50 μm and a Young’s modulus of 3 GPa, which is thermally shrunk along the uniaxial direction, has a glass transition temperature of 70 °C) was coated with polymethyl methacrylate (P4831-MMA, glass transition temperature: 100 °C) diluted with toluene using a bar coater to a thickness of 200 nm. , forming a hard layer to obtain a laminated sheet.

[0489] Next, heat the laminated sheet at 80° C. for 1 minute to shrink it to 40% of its length before heating (that is, to deform the deformation rate to 60%) to obtain a hard layer along the length relative to the shri...

Embodiment 2

[0492] A concavo-convex pattern forming sheet (light diffuser) was obtained in the same manner as in Example 1, except that polystyrene (PS manufactured by Polymer Sors Co., Ltd., glass transition temperature: 100° C.) diluted with toluene was applied.

[0493] In addition, the Young's modulus at 80° C. of the heat-shrinkable film made of polyethylene terephthalate and the polystyrene were 50 Mpa and 1 GPa, respectively.

Embodiment 3

[0495] Except that the coating thickness of polystyrene was 1 micrometer, it carried out similarly to Example 2, and obtained the uneven|corrugated pattern forming sheet (light diffuser).

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Abstract

Disclosed is a sheet having an uneven pattern formed thereon, which comprises a base material comprising a resin and a hard layer formed on one surface of the base material and comprising a resin, wherein an uneven pattern is formed on the surface of the hard layer. In the sheet, the difference between the glass transition temperature (Tg2) of the resin constituting the hard layer and the glass transition temperature (Tg1) of the resin constituting the base material (Tg2 - Tg1) is 10 DEG C or more, and the average depth of the bottoms of the uneven pattern is 10% or more when the modal pitch is set as 100%. Also disclosed is a method for producing the sheet.

Description

technical field [0001] The present invention relates to a concavo-convex pattern forming sheet arranged on a light diffuser and a method for manufacturing the same. Moreover, it is also related with the light diffuser using a concavo-convex pattern forming sheet. Moreover, it is related with the process sheet original plate for light-diffusion body manufacture, and it is used as the metal mold|die for manufacture of the light-diffusion body in which the uneven|corrugated pattern was formed in the surface. Furthermore, it also relates to the manufacturing method of an optical diffuser. [0002] The present invention relates to an optical sheet and a light-diffusing sheet used as a light-diffusing sheet and the like. [0003] The present invention relates to a diffusing light guide for diffusing light emitted by a light source. In addition, it also relates to a backlight unit arranged in a liquid crystal display device. [0004] The present invention relates to a concavo-con...

Claims

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Application Information

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IPC IPC(8): G02B5/02B32B3/30B32B7/02B32B27/00G02B1/11G02B5/30G02B1/118
Inventor 冈安俊树森幸惠藤木保武
Owner OJI PAPER CO LTD
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