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Method for cutting laminated film, cutting device, and method for manufacturing optical display device

A cutting method and laminated film technology, applied in metal processing, adhesives, etc., can solve the problems of cutting surface burrs, surface protective film floating, defects, etc., and achieve the effect of suppressing cracks, suppressing burrs or floating

Active Publication Date: 2012-04-11
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, optical films such as the above-mentioned polarizing film are formed by laminating a plurality of extremely thin film layers through an adhesive layer. When such a laminated film is cut, burrs may be generated on the cut surface and floating of the surface protection film may occur. , or the so-called cracks in which cracks appear on the polarizer due to heating or cooling in the polarizing film
[0013] The occurrence of defects when cutting such an optical film cannot be sufficiently suppressed by any of the cutting methods described in Patent Document 1 or Patent Document 2.

Method used

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  • Method for cutting laminated film, cutting device, and method for manufacturing optical display device
  • Method for cutting laminated film, cutting device, and method for manufacturing optical display device
  • Method for cutting laminated film, cutting device, and method for manufacturing optical display device

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Embodiment

[0089] Next, although an Example is given and this invention is demonstrated in detail, this invention is not limited to this.

[0090] laminated film

[0091] In Examples and Comparative Examples, the following samples A (product name, NPF-VEG1724DU, manufactured by Nitto Denko Co., Ltd.), B (product name, NTB-EFCVEQ-K1, manufactured by Nitto Denko Co., Ltd.) and C ( Product name, NZB-CVEQ-ST19, manufactured by Nitto Denko Co., Ltd.) these three kinds of polarizing films.

[0092] These polarizing films were prepared as rolls with a width of 400 mm and a length of 50 m.

[0093] device

[0094] As the cutting device, a roller-feeding type self-rotating circular knife cutting test machine having the above-mentioned structure was used.

[0095]As the round cutter, Kyocera Corporation's ultra-hard round cutter FW05 was used, and the following five sizes were prepared.

[0096] Blade diameter = 60mm, blade thickness = 0.5mm, tip angle = 20°

[0097] Blade diameter = 80mm...

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Abstract

A method for cutting a laminated film, adapted to cut the laminated film using a circular cutter having a cutting edge at the peripheral edge thereof. The method cuts the laminated film by rotating the circular cutter by a rotating means in the forward rotational direction relative to the cutting direction at a cutting-edge peripheral speed Vr while causing the laminated film to travel in the cutting direction at a travel speed Vc. The relative cutting speed V obtained by subtracting the peripheral speed Vr from the travel speed Vc is set in the range from minus 50 m / min to 30 m / min inclusive.

Description

technical field [0001] The present invention relates to a method for cutting a laminated film, a laminated film obtained by laminating multiple layers via an adhesive layer such as an optical film such as a polarizing film, a cutting device for the laminated film, and a method for manufacturing an optical display device. Background technique [0002] Optical films represented by polarizing films, retardation films, and the like are useful as optical elements of liquid crystal display devices and the like. [0003] As the optical film, for example, a PVA (polyvinyl alcohol) film dyed with iodine and stretched on both sides of a PVA polarizer, laminated with a surface protection film via an adhesive layer, and further laminated on one side with an adhesive A polarizing film of a laminated structure in which a release film is provided as a layer. [0004] Such a polarizing film is generally used by unrolling a longitudinally long film from a rolled state and cutting the polari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26D3/00B26D1/14
CPCB26D1/185B26D1/205B26D3/08B26D1/18B26D7/018Y10T83/0515Y10T83/4795Y10T156/1062
Inventor 小盐智中园拓矢泷川真广
Owner NITTO DENKO CORP
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