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Process for producing film

A manufacturing method and film technology, applied in the field of transparent film and its manufacturing, can solve the problems of breakage, low elongation, low tensile strength and the like of the base film

Active Publication Date: 2012-02-01
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, acrylic films and TAC films have low tensile strength and low elongation at the temperature (for example, 50 to 150° C.) at which the active energy ray-curable resin composition is cured.
Therefore, when an acrylic film or a TAC film is used as the base film in the roll-to-roll method, there is a problem that the base film after forming the cured layer is broken due to the tension applied to the base film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0280] The present invention will be specifically described below through examples, but the present invention is not limited thereto.

[0281] (1) First, how the influence of ultraviolet rays on the organic release agent varies depending on the type of base film was investigated.

[0282] (die a)

[0283] A 50 mm square aluminum plate (purity: 99.99%) was mirror-polished.

[0284] Process (a):

[0285] The said aluminum plate was anodized in 4.5 mass % oxalic-acid aqueous solution for 6 hours on the conditions of direct current: 40V, temperature: 16 degreeC.

[0286] Process (b):

[0287] The aluminum plate on which the oxide film was formed was immersed in a mixed aqueous solution of 6% by mass phosphoric acid / 1.8% by mass chromic acid at 70° C. for 6 hours to remove the oxide film.

[0288] Process (c):

[0289] The aluminum plate was anodized for 30 seconds in a 2.7% by mass oxalic acid aqueous solution under conditions of direct current: 40V and temperature: 16°C.

...

Embodiment 1

[0348] use Figure 7 The fabrication setup shown in was used to fabricate transparent films.

[0349] As the roll-shaped die 22, the above-mentioned die b was used.

[0350] As the active energy ray-curable resin composition 21, the above-mentioned active energy ray-curable resin composition A is used.

[0351] As the base film 18 supported by the supporting film 17, a PET film (Sun A. A film made of Kaken Co., Ltd., trade name: SAT116, thickness: 38 μm). Among them, the acrylic film used a film obtained as follows: using such as Figure 9 The illustrated scoring spray device includes a brush roll 50 having a concave-convex shape formed of titanium oxide on its surface and tension rolls 52 and 54 arranged in front of and behind the brush roll 50. Rotate in the opposite direction, at the same time, to roughen the surface of the acrylic film, thus obtaining the film. The above-mentioned device can adjust the surface roughness by changing the tension applied on the acrylic f...

Embodiment 2

[0359] A transparent film was produced in the same manner as in Example 1 except that the PET film with a release layer was bonded to the acrylic film using an acrylic forming agent and the surface of the acrylic film was not roughened. As a result, a transparent film equivalent to that of Example 1 could be produced continuously and stably.

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Abstract

A process for stably producing a transparent film which comprises a base film and, formed on a surface thereof, a cured layer having a finely roughened structure. The process comprises: a step in which an actinic-energy-ray-curable resin composition (21) containing a polymerization initiator that can absorb light having a wavelength of 340 nm or longer to initiate polymerization of a polymerizable compound is sandwiched between a surface of a base film (18) supported on a substrate film (17) that has light transmittances of 10% or lower in the wavelength range of 190-310 nm and of 60% or higher in the wavelength range of 340-900 nm and a mold (22) having, on the surface, the reverse of the finely roughened structure; a step in which the actinic-energy-ray-curable resin composition (21) is irradiated with ultraviolet from the substrate film (17) side to obtain a transparent film (16) supported on the substrate film (17); and a step in which the transparent film (16) is separated from the mold (22).

Description

technical field [0001] The present invention relates to a transparent film with a fine concave-convex structure on the surface and a manufacturing method thereof. [0002] This application claims priority based on Patent Application No. 2009-049898 filed in Japan on March 3, 2009 and Patent Application No. 2009-152262 filed in Japan on June 26, 2009, the contents of which are incorporated herein by reference. Background technique [0003] In recent years, it has been known that articles having a fine concave-convex structure with a period equal to or less than the wavelength of visible light on the surface exhibit an antireflection effect, a lotus effect, etc. The concave-convex structure of the eye structure forms an effective anti-reflection means through the continuous increase of the refractive index 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 the surface can be obtained, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/04B32B27/16B29K1/00B29K33/00B29L7/00B29L9/00G02B1/11B29C33/58B32B3/30
CPCB29C33/60B29C39/148B29C39/18B29C43/222B29C43/28G02B1/118B29C37/0067B29C59/046Y10T428/24612B29C33/58B29C59/04B32B3/30B32B27/16
Inventor 小泽觉中村雅冈本英子小岛克宏
Owner MITSUBISHI CHEM CORP
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