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Transparent film having micro-convexoconcave structure on surface thereof, method for producing same, and substrate film used in production of transparent film

A technology of fine concave-convex structure and transparent film, which is applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, application, etc., can solve problems such as poor refractive index and poor appearance, and achieve excellent adhesion and good appearance quality.

Inactive Publication Date: 2014-05-21
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, when there are pits with a depth more than necessary, the active energy ray-curable resin composition does not enter the pits, and the difference in refractive index between the air remaining in the pits and the material of the base film and the cured layer is caused. produce poor appearance
[0011] In particular, a transparent film whose surface has a fine concavo-convex structure with a period equal to or less than the wavelength of visible light has excellent antireflection performance and high transparency, so defects that were invisible to conventional optical films are also apparent.

Method used

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  • Transparent film having micro-convexoconcave structure on surface thereof, method for producing same, and substrate film used in production of transparent film
  • Transparent film having micro-convexoconcave structure on surface thereof, method for producing same, and substrate film used in production of transparent film
  • Transparent film having micro-convexoconcave structure on surface thereof, method for producing same, and substrate film used in production of transparent film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0252] use figure 2 The fabrication setup shown produces transparent films.

[0253] As the roll-shaped die 22, the aforementioned die a was used.

[0254] As the active energy ray-curable resin composition 21, the active energy ray-curable resin composition A shown in Table 1 was used.

[0255] As the base film 18, an acrylic film having the maximum valley depth Pv and the average width RSm of the contour elements shown in Table 3 was used. In addition, the value of the maximum height roughness Rz (according to JISB0601:2001) is recorded as a reference.

[0256] The coating film of the active energy ray-curable resin composition A is irradiated with a cumulative light intensity of 1000 mJ / cm from the base film 18 side 2 The active energy ray-curable resin composition A is cured by ultraviolet rays. The temperature of the surface of the mold a when the active energy ray-curable resin composition A was cured was 70°C.

[0257] The average period of the protrusions of the ...

Embodiment 2～6、 comparative example 1～2）

[0259]Except having used what is shown in Table 3 as the active energy ray-curable resin composition 21 and the base film 18, and having changed the temperature of the mold 22, it carried out similarly to Example 1, and manufactured the transparent film.

[0260] Table 3 shows the evaluation results of the adhesiveness and appearance of the transparent film.

[0261] [table 3]

[0262]

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Abstract

The present invention pertains to a transparent film in which: a hardened layer, which has a micro-convex-concave structure in which the average wave period of the convex or concave sections is 20-400nm, inclusive, is formed on the rough surface of a substrate film obtained from an acrylic resin having a rough surface in which the maximum valley depth (Pv) is 0.1-3mum, and the average length (RSm) of a contour curve element is 10mum, in compliance with the JIS B0601; and the number of lattice squares in the hardened layer adhered to the substrate film is 51 or more when a cross cut test is performed using a 100-square lattice at 2mm intervals, in compliance with the JIS K5400.

Description

technical field [0001] The present invention relates to a transparent film having a fine concave-convex structure on the surface, a production method thereof, and a base film for producing the transparent film. [0002] this application claims priority based on Japanese Patent Application No. 2011-195998 for which it applied to Japan on September 8, 2011, and uses the content here. Background technique [0003] In recent years, it has been known that an article having a fine concave-convex structure whose period is equal to or less than the wavelength of visible light exhibits an antireflection effect, a lotus leaf effect, and the like on the surface. In particular, a concavo-convex structure called a moth-eye structure is known to be an effective antireflection means in which the refractive index increases continuously from the refractive index of air to the refractive index of the material of the article. [0004] An article having a fine uneven structure on its surface i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/04B29C39/18B32B3/30H01L21/027B29L7/00B29L9/00B29L11/00
CPCB29C37/0067B29C59/046B32B3/30B32B27/08B32B27/16B32B27/308B32B2307/412B32B2307/418B32B2307/54G02B1/118G02B5/0215Y10T428/24612B29C39/18B29C59/04H01L21/027B29C37/0053B32B3/263
Inventor 内田雅行小岛克宏地纸哲哉
Owner MITSUBISHI CHEM CORP
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