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Method for manufacturing laminated film

A manufacturing method, a technology for laminating films, applied in chemical instruments and methods, lamination, layered products, etc., can solve problems such as air bubble mixing, and achieve the effect of inhibiting mixing

Active Publication Date: 2015-01-07
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that, when the thickness of the active energy ray-curable adhesive is intended to be thinned, the problem of the mixing of air bubbles is particularly likely to occur.

Method used

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  • Method for manufacturing laminated film
  • Method for manufacturing laminated film
  • Method for manufacturing laminated film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0148] In this embodiment, the laminated film is manufactured from one optical film and two transparent films. In addition, in the adhesive coating step, the adhesive is applied to one side of each of the two transparent films, and in the pasting step, the adhesive of the two transparent films is mixed with the adhesive. In a state where both surfaces of the optical film are in contact with each other, the optical film and the transparent film are sandwiched between the pair of bonding rollers to bond each other.

[0149] Next, the manufacturing method of the present embodiment will be described with reference to the drawings. figure 1 It is a schematic diagram showing the structure of the whole apparatus used in the manufacturing method of this embodiment.

[0150] figure 1 In the manufacturing device of the laminated film shown in , adhesive coating devices 11 and 12 for coating adhesive on one side of the transparent films 2 and 3 are arranged in sequence along the convey...

Embodiment approach 2

[0167] In this embodiment, the laminated film is produced from one optical film and one transparent film. In addition, in the adhesive coating step, the adhesive is coated on one side of the transparent film, and in the laminating step, the adhesive on the transparent film and one side of the optical film are In the state laminated|stacked so that contact, the said optical film and the said transparent film are pinched between the said pair of bonding rolls, and are mutually bonded.

[0168] Next, the manufacturing method of the present embodiment will be described with reference to the drawings. figure 2 It is a schematic diagram showing the structure of the whole apparatus used in the manufacturing method of this embodiment.

[0169] figure 2 In the manufacturing device of the laminated film shown in , an adhesive coating device 11 for coating an adhesive on one side of the transparent film 2 is provided sequentially along the conveying direction, and an adhesive coating...

Embodiment 1

[0176] In this example, using the above described in Embodiment 2 such as figure 2 The apparatus shown produces a laminated film in which two films are bonded together.

[0177] A 60-micrometer-thick cycloolefin resin film "ZEONOR" (manufactured by Nippon Zeon Co., Ltd.) and a 80-micrometer-thick triacetylcellulose film "KC8UX2MW" (manufactured by Konica Minolta) were prepared. The surface roughness (Rz) of the cycloolefin-based resin film was measured using "HANDYSURF (Handy Surf) E35A" manufactured by Tokyo Seiki Co., Ltd., and it was 30 nm. In addition, this value is the average value at the time of setting the measurement distance to 12.5 mm and measuring the surface roughness 10 times by mounting the said measuring apparatus on the object film.

[0178] An epoxy resin composition "KR-70T" (manufactured by ADEKA Corporation, viscosity: 44 mPa·s) as an ultraviolet-curable adhesive was applied to one side of the triacetyl cellulose film using an adhesive coating device. A...

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Abstract

A method provided with, in this order, an adhesive application step for applying an active-energy-ray curable adhesive to one or both surfaces of at least one film of a plurality of films, a bonding step for bonding together the plurality of films by inserting the films between a pair of bonding rolls rotating in a conveyance direction in a state in which adjacent films are laminated so that the adhesive is interposed therebetween, and an active-energy-ray irradiation step for curing the adhesive by irradiating active energy rays to the plurality of films that have been bonded together, the surface roughness of the surface to which the adhesive was not applied in the adhesive application step from among the plurality of films, which is the surface contacting the adhesive in the bonding step, being 200 nm or less.

Description

technical field [0001] The present invention relates to a method for producing a laminated film used in various applications such as optical components. Background technique [0002] A polarizing film is widely used as a film in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol-based resin film. Iodine-based polarizing films using iodine as a dichroic dye and dichroic direct dyes are known. Dye-based polarizing films as dichroic dyes, etc. These polarizing films are usually made into polarizing plates by bonding transparent films such as triacetyl cellulose films to one or both sides of the polarizing film with an adhesive. [0003] As a method of laminating a transparent film on one side or both sides of a polarizing film, there is a method in which an active energy ray-curable resin is applied to the surface of the transparent film in advance, and then the polarizing film and the transparent film are laminated by a pair of bonding rollers. Clamping and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B27/00
CPCG02B5/30G02B5/305B32B37/1207B32B37/206B32B2037/1253B32B2309/105B32B2310/0806B32B2310/0831G02B5/3041B32B27/00
Inventor 古川淳广岩梓竹内智康久米悦夫山根尚德
Owner SUMITOMO CHEM CO LTD
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