WO2018025620A1 - Method for punching out polarizing plate, and punching device used in method - Google Patents

Method for punching out polarizing plate, and punching device used in method Download PDF

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Publication number
WO2018025620A1
WO2018025620A1 PCT/JP2017/025735 JP2017025735W WO2018025620A1 WO 2018025620 A1 WO2018025620 A1 WO 2018025620A1 JP 2017025735 W JP2017025735 W JP 2017025735W WO 2018025620 A1 WO2018025620 A1 WO 2018025620A1
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Prior art keywords
polarizing plate
blade
punching
curve
mold
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PCT/JP2017/025735
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French (fr)
Japanese (ja)
Inventor
篤彦 杉本
宏太 仲井
シンシン リ
テイショウ チェン
チーウェイ コウ
シンヨン ホ
Original Assignee
日東電工株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to CN201780002934.0A priority Critical patent/CN107949461A/en
Priority to KR1020187003277A priority patent/KR102437197B1/en
Publication of WO2018025620A1 publication Critical patent/WO2018025620A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor

Definitions

  • the present invention relates to a method of punching a polarizing plate and a punching apparatus used in the method.
  • polarizing plates have been used in image display devices and the like, and polarizing plate pieces cut out from polarizing plates manufactured in a large area and having a shape corresponding to the application are applied to the image display devices.
  • punching means having a Thomson blade is employed.
  • the punching means including the Thomson blade is configured by arranging a plurality of blades on a mold corresponding to the shape of the polarizing plate piece.
  • One of the problems when punching out a polarizing plate piece is prevention of cracks generated in the polarizing plate (or polarizing plate piece).
  • the punching means provided with the Thomson blade is composed of a plurality of blades, it has a blade seam.
  • the inventors of the present invention have found that the blade seam contributes to the crack.
  • the present invention has been made in order to solve the above-described conventional problems, and its main purpose is to prevent the occurrence of cracks and punch a polarizing plate with various shapes, thereby punching a polarizing plate. It is to provide a method.
  • the method for punching a polarizing plate of the present invention includes punching the polarizing plate with a corroding blade type or an engraving blade type to obtain a polarizing plate piece having a predetermined shape, and the outer periphery of the polarizing plate piece is composed of a line including a curve.
  • the ratio of the said curve is 10% or more with respect to the full length of the line
  • the outline of the polarizing plate piece is composed only of a curve.
  • the above-mentioned polarizing plate piece is circular or elliptical.
  • a punching device is provided. This punching device is a punching device used for the polarizing plate punching method, and includes a corroding blade type or an engraving blade type.
  • a method for punching a polarizing plate in which the occurrence of cracks can be prevented by punching the polarizing plate with a corroding blade type or an engraving blade type, and the polarizing plate pieces having various shapes can be punched. Can be provided.
  • the method for punching a polarizing plate of the present invention includes punching a polarizing plate with a corroding blade or engraving blade to obtain a polarizing plate having a predetermined shape.
  • the corrosion blade type (so-called Pinnacle blade type, Pinnacle Die (registered trademark)) is a blade type composed of a corrosion blade formed from a metal plate by an etching method.
  • the engraving blade mold is a blade mold composed of an engraving blade formed by cutting a metal plate.
  • the corrosion blade type or the engraving blade type is characterized in that it is constructed seamlessly.
  • the occurrence of cracks in the polarizing plate and the polarizing plate piece can be prevented by punching out the polarizing plate by a punching means having a corroding blade or engraving blade.
  • a punching means having a corroding blade or engraving blade.
  • the blade seam In the Thomson blade type that has been used in the past, there is a blade seam, and the blade is finely displaced at the joint, and it is assumed that cracks are caused by the displacement due to the impact at the time of punching.
  • the blade tends to be misaligned due to the stress that the blade tries to open, so compared to the case where the blade seam exists in the straight part Thus, it is speculated that the problem of cracking will become prominent.
  • FIG. 1 is a schematic perspective view of a corroding blade type used in one embodiment of the present invention.
  • FIG. 2 is a schematic partial sectional view of a corroding blade type used in one embodiment of the present invention.
  • the corrosion blade mold 100 includes a blade portion 10 and a base portion 20.
  • the blade portion 10 defines a punched portion 11 corresponding to the shape of the polarizing plate piece in plan view. It is preferable that a plurality of punched portions 11 exist on the corrosion blade mold 100.
  • the corrosion blade type may be a flat plate shape or a roll shape.
  • the blade height (height A in FIG. 2) of the corrosion blade type is preferably 0.3 mm to 10 mm, more preferably 0.35 mm to 6 mm.
  • the blade depth (height B in FIG. 2) of the corroded blade type is preferably 0.1 mm to 4.5 mm, more preferably 0.2 mm to 2 mm.
  • the thickness of the corroded blade base is preferably 0.1 mm to 5.5 mm, more preferably 0.13 mm to 2 mm.
  • the blade angle of the corroded blade type (angle D in FIG. 2) is preferably 15 ° to 80 °.
  • the corrosion well type Rockwell hardness HRC is preferably 40 ° to 80 °, more preferably 45 ° to 70 °.
  • the Rockwell hardness HRC can be measured by a method according to JISJZ 2245.
  • the interval between adjacent punched portions is preferably 0.5 mm to 5 mm, more preferably 1 mm to 3 mm. According to the present invention, since the generation of cracks can be prevented, the punched portions can be provided densely, and a polarizing plate piece can be obtained with a high yield.
  • FIG. 3 is a schematic diagram for explaining a method of punching a polarizing plate of the present invention according to one embodiment.
  • a punching unit 300 configured by attaching the corrosion blade mold (flat corrosion blade mold) 100 to the base plate 200 is used.
  • the punching means 300 is moved downward toward the polarizing plate 500, or the cutting plate 400 is moved. Is moved upward toward the punching means 300 to bring the corrosion blade mold 100 into contact with the polarizing plate 500, thereby punching out the polarizing plate 500 to obtain a polarizing plate piece having a predetermined shape.
  • FIG. 4 is a schematic diagram for explaining a method for punching a polarizing plate according to another embodiment of the present invention.
  • the corroding blade mold 100 is attached to the surface of the first roll 600, and punching means 300 'configured as a roll-shaped rotary blade is used.
  • the punching means 300 ′ and the second roll 700 that receives the corroding blade mold are rotated together, and the polarizing plate 500 is punched by passing the polarizing plate 500 between the rolls.
  • a piece 510 is obtained.
  • a conveyance base material may be arrange
  • the gap between the first roll and the second roll, and the blade height and blade depth of the corroded blade type can be adjusted so as not to fully cut the transport substrate.
  • a polarizing plate piece can be conveyed to the following process with a conveyance base material.
  • the polarizing plate used for punching may be long or single-wafer. Preferably, it is long.
  • a long polarizing plate when a long polarizing plate is used, after the work portion is transported onto the cutting plate, the transport is once stopped and punching is performed as described above, and after the punching is completed once. Then, a series of operations in which the workpiece to be punched next is conveyed to the cutting plate and the next punching is performed is repeated, and all the long polarizing plates are subjected to punching.
  • the polarizing plate is continuously passed between the punching means rotating together with the second roll, thereby forming the long polarizing plate. All of the polarizing plates are subjected to punching.
  • the polarizing plate piece obtained by punching may have any appropriate shape.
  • the outer periphery of the polarizing plate piece is composed of a line including a curve.
  • Conventionally used Thomson blade molds have blade joints, and when punched with Thomson blade molds, there is a problem that cracks are likely to occur due to the joints.
  • a polarizing plate piece having a curved portion when the joint of the blade is located in the curved portion, cracks occur frequently.
  • cracks can be prevented not only in the punching of a conventional rectangular polarizing plate piece but also in the punching of a polarizing plate piece having a curved portion.
  • the ratio of the curve is 10% or more with respect to the total length of the line constituting the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the ratio of the curve is 30% or more with respect to the total length of the lines constituting the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the proportion of the curve is 50% or more with respect to the total length of the lines that form the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the ratio of the curve is 70% or more with respect to the total length of the lines constituting the outline of the polarizing plate. According to the present invention, a polarizing plate piece having a high curve ratio can be punched without cracks.
  • the outer periphery of the polarizing plate piece is composed only of a curve.
  • the outer angle of the polarizing plate may be a free curve.
  • the radius of curvature of the curve is 900 mm or less. In one embodiment, the radius of curvature of the curve is 600 mm or less. In one embodiment, the radius of curvature of the curve is 300 mm or less. In one embodiment, the radius of curvature of the curve is 150 mm or less. In one embodiment, the radius of curvature of the curve is 100 mm or less. According to the present invention, a polarizing plate piece including a curve having a small radius of curvature can be punched without cracks.
  • the polarizing plate piece is circular or elliptical.
  • the circular shape is a concept including a substantially circular shape
  • the elliptical shape is a concept including a substantially elliptical shape.
  • the radius R of the polarizing plate is 900 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 600 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 300 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 150 mm or less. In one embodiment, when the said polarizing plate is circular shape, the radius R of this polarizing plate is 100 mm or less. According to the present invention, a circular polarizing plate piece having a small radius R can be punched without cracks.
  • the punching device of the present invention is a device used for punching a polarizing plate, and includes a corroding blade mold or an engraving blade mold.
  • a corroding blade mold or an engraving blade mold As the corrosion blade mold or the engraving blade mold, the blade mold described in the above section A is used.
  • the corrosion blade mold is lightweight, and in the punching device of the present invention, the mechanism for operating the punching means provided with the corrosion blade mold can be simplified. Further, the corroded blade type is advantageous in terms of cost.
  • the punching device of the present invention is a punching means configured by attaching the corrosion blade mold (flat corrosion blade mold) 100 (or engraving blade mold) to the base plate 200. 300 and a cutting plate 400 which is disposed opposite to the punching means 300 and receives the corroding blade mold 100 (or engraving blade mold) at the time of punching.
  • the punching means 300 is moved downward toward the cutting plate 400, or the cutting plate 400 is punched out.
  • the polarizing plate can be punched out by moving upward toward the means 300 and bringing the corrosion blade mold 100 (or engraving blade mold) into contact with the polarizing plate 500. Any appropriate means can be adopted as the punching means and / or the means for moving the cutting plate.
  • the punching device of the present invention is configured as a roll-shaped rotary blade by sticking the corrosion blade mold 100 (or engraving blade mold) to the surface of the first roll 600 as shown in FIG. Punching means 300 ′ to be punched out, and a second roll 700 that is disposed in proximity to the punching means 300 ′ and receives the corroding blade mold 100 (or engraving blade mold).
  • Examples of the method of attaching the corroding blade type or the engraving blade type to the first roll include a method of using a magnet roll as the first roll and attaching it by magnetic force. An elastic roll can be used as the second roll.
  • the polarizing plate as the workpiece is passed between the first roll 600 (that is, the punching means 300 ′) and the second roll 700 rotating together.
  • the polarizing plate can be punched out.
  • Any appropriate means can be adopted as the means for rotating the first roll and the second roll.
  • the gap between the first roll and the second roll can be adjusted to any appropriate gap according to the thickness of the polarizing plate, which is a workpiece, and the blade height of the corroding blade or engraving blade. Any appropriate means can be adopted as means for adjusting the gap.
  • the above punching device can be used in combination with any appropriate transporting device (for example, a transporting belt, a transporting roll, etc.) for transporting a workpiece, or any suitable removing device for removing punched debris after punching.
  • any appropriate transporting device for example, a transporting belt, a transporting roll, etc.
  • any suitable removing device for removing punched debris after punching.
  • Example 1 As shown in FIG. 1, a base portion (300 mm ⁇ 200 mm) and a blade portion composed of a corroded blade (curvature radius of curvature: 41 mm, length of straight portion: 22 mm, spacing between blade portions: 2 mm, blade The polarizing plate was punched out using a blade type having a plurality of depths: 3 mm.
  • a polarizing plate As the polarizing plate, a polarizing plate (thickness: 219 ⁇ m) composed of a polarizer (“NZD-UFQAMEGQ1773VDUHC-ACJ” manufactured by Nitto Denko Corporation) and a protective film (“PPF-100T” manufactured by Nitto Denko Corporation) was used. .
  • the polarizing plate punched out with the above blade mold was subjected to a heat shock test, and the polarizing plate after the test was visually confirmed. Any polarizing plate was cracked by a length of 0.5 mm or more from the outer periphery of the polarizing plate. Was not confirmed.
  • the conditions of the heat shock test were set to 100 cycles of ⁇ 40 ° C. (30 minutes) ⁇ 85 ° C. (30 minutes) ⁇ ⁇ 40 ° C. (30 minutes).
  • a blade portion constituted by a Thomson blade having a seam in the straight portion is used in the same manner as in Example 1, that is, the base portion (300 mm ⁇ 200 mm) is separated from the Thomson blade.
  • the base portion 300 mm ⁇ 200 mm
  • the polarizing plate was punched out.
  • a polarizing plate having a crack of 0.5 mm or more in length from the outer periphery of the polarizing plate was confirmed.
  • a blade portion composed of a Thomson blade having a seam in the curved portion is used in the same manner as in Example 1, that is, the base portion (300 mm ⁇ 200 mm) is separated from the Thomson blade.
  • the base portion 300 mm ⁇ 200 mm
  • the polarizing plate was punched out.
  • a polarizing plate having a crack of 0.5 mm or more in length from the outer periphery of the polarizing plate was confirmed.
  • Blade part 20 Base part 100 Corrosion blade type

Abstract

Provided is a method for punching out a polarizing plate, with which it is possible to prevent generation of cracks and to punch out polarizing plate pieces in a variety of shapes. This method for punching a polarizing plate comprises punching out a polarizing plate by means of an etching blade die or a chisel blade die to obtain a polarizing plate piece of a prescribed shape, wherein the outline of the polarizing plate piece consists of lines including a curved line. In one embodiment of the present invention, the curved line accounts for at least 10% of the total length of the lines constituting the outline of the polarizing plate.

Description

偏光板の打ち抜き方法、および該方法に用いられる打ち抜き装置Punching method of polarizing plate and punching apparatus used for the method
　本発明は、偏光板の打ち抜き方法および該方法に用いられる打ち抜き装置に関する。 The present invention relates to a method of punching a polarizing plate and a punching apparatus used in the method.
　従来より、画像表示装置等には偏光板が用いられており、画像表示装置には、大面積で製造された偏光板から切り出され、用途に応じた形状を有する偏光板片が適用される。一般に、偏光板片を切り出す際には、トムソン刃を備える打ち抜き手段が採用されている。トムソン刃を備える打ち抜き手段は、偏光板片の形状に対応した型枠に複数の刃を配置して構成されている。 Conventionally, polarizing plates have been used in image display devices and the like, and polarizing plate pieces cut out from polarizing plates manufactured in a large area and having a shape corresponding to the application are applied to the image display devices. Generally, when a polarizing plate piece is cut out, punching means having a Thomson blade is employed. The punching means including the Thomson blade is configured by arranging a plurality of blades on a mold corresponding to the shape of the polarizing plate piece.
　一方、近年、画像表示装置の用途は多様化しており、当該画像表示装置に用いられる偏光板の形状も多様化している。例えば、車載画像表示装置（例えば、インパネに用いられる画像表示装置）等においては、外郭が曲線で構成された偏光板（偏光板片）が用いられることがある。このような偏光板片形状の多様化に対応して、不具合なく偏光板片を打ち抜く技術の確立が求められている。 On the other hand, in recent years, applications of image display devices have been diversified, and the shapes of polarizing plates used in the image display devices have also been diversified. For example, in a vehicle-mounted image display device (for example, an image display device used for an instrument panel) or the like, a polarizing plate (polarizing plate piece) whose outer shape is configured by a curve may be used. In response to such diversification of the shape of the polarizing plate piece, establishment of a technique for punching out the polarizing plate piece without a problem is demanded.
特開２００９－５６７３５号公報JP 2009-56735 A
　偏光板片を打ち抜く際の課題のひとつとして、偏光板（または偏光板片）に生じるクラックの防止が挙げられる。 One of the problems when punching out a polarizing plate piece is prevention of cracks generated in the polarizing plate (or polarizing plate piece).
　トムソン刃を備える打ち抜き手段は、複数刃から構成されているため、刃の継ぎ目を有するが、本発明の発明者らは、この刃の継ぎ目が、上記クラックの一因であることを見いだした。特に、曲線部を有する偏光板片を打ち抜く際、上記刃の継ぎ目が曲線部に位置すると、高頻度でクラックが生じることを見いだした。 Since the punching means provided with the Thomson blade is composed of a plurality of blades, it has a blade seam. The inventors of the present invention have found that the blade seam contributes to the crack. In particular, when punching out a polarizing plate piece having a curved portion, it has been found that cracks frequently occur when the joint of the blade is located in the curved portion.
　本発明は上記従来の課題を解決するためになされたものであり、その主たる目的は、クラックの発生を防止して、種々の形状の偏光板片を打ち抜くことが可能となる、偏光板の打ち抜き方法を提供することにある。 The present invention has been made in order to solve the above-described conventional problems, and its main purpose is to prevent the occurrence of cracks and punch a polarizing plate with various shapes, thereby punching a polarizing plate. It is to provide a method.
　本発明の偏光板の打ち抜き方法は、腐食刃型または彫刻刃型により偏光板を打ち抜き、所定形状の偏光板片を得ることを含み、該偏光板片の外郭が、曲線を含む線から構成される。
　１つの実施形態においては、上記曲線の割合が、前記偏光板の外郭を構成する線の全長に対して、１０％以上である。
　１つの実施形態においては、上記偏光板片の外郭が、曲線のみから構成される。
　１つの実施形態においては、上記偏光板片が、円形状または楕円形状である。
　本発明の別の局面によれば、打ち抜き装置が提供される。この打ち抜き装置は、上記偏光板の打ち抜き方法に用いる打ち抜き装置であって、腐食刃型または彫刻刃型を備える。 The method for punching a polarizing plate of the present invention includes punching the polarizing plate with a corroding blade type or an engraving blade type to obtain a polarizing plate piece having a predetermined shape, and the outer periphery of the polarizing plate piece is composed of a line including a curve. The
In one embodiment, the ratio of the said curve is 10% or more with respect to the full length of the line | wire which comprises the outline of the said polarizing plate.
In one embodiment, the outline of the polarizing plate piece is composed only of a curve.
In one embodiment, the above-mentioned polarizing plate piece is circular or elliptical.
According to another aspect of the present invention, a punching device is provided. This punching device is a punching device used for the polarizing plate punching method, and includes a corroding blade type or an engraving blade type.
　本発明によれば、腐食刃型または彫刻刃型により偏光板を打ち抜くことにより、クラックの発生を防止して、種々の形状の偏光板片を打ち抜くことが可能となる、偏光板の打ち抜き方法を提供することができる。 According to the present invention, there is provided a method for punching a polarizing plate, in which the occurrence of cracks can be prevented by punching the polarizing plate with a corroding blade type or an engraving blade type, and the polarizing plate pieces having various shapes can be punched. Can be provided.
本発明の１つの実施形態に用いられる腐食刃型の概略斜視図である。It is a schematic perspective view of the corrosion blade type | mold used for one embodiment of this invention. 本発明の１つの実施形態に用いられる腐食刃型の概略部分断面図である。It is a general | schematic fragmentary sectional view of the corrosion blade type | mold used for one embodiment of this invention. １つの実施形態による本発明の偏光板の打ち抜き方法を説明する概略図である。It is the schematic explaining the punching method of the polarizing plate of this invention by one embodiment. 別の実施形態による本発明の偏光板の打ち抜き方法を説明する概略図である。It is the schematic explaining the punching method of the polarizing plate of this invention by another embodiment.
Ａ．偏光板の打ち抜き方法
　本発明の偏光板の打ち抜き方法は、腐食刃型または彫刻刃型により偏光板を打ち抜き、所定形状の偏光板片を得ることを含む。腐食刃型（いわゆる、ピナクル刃型、ピナクルダイ（登録商標））とは、金属板からエッチング法により形成された腐食刃から構成される刃型である。彫刻刃型とは、金属板から切削により形成された彫刻刃から構成される刃型である。腐食刃型または彫刻刃型は継ぎ目なく構成されることを特徴としている。本発明においては、腐食刃型または彫刻刃型を備える打ち抜き手段により偏光板を打ち抜くことにより、偏光板および偏光板片に生じるクラックの発生を防止することができる。なお、従来用いられていたトムソン刃型においては、刃の継ぎ目が存在し、継ぎ目では刃が微細にズレており、打抜き時の衝撃によりそのズレがきっかけとなってクラックが生じると推測される。また、トムソン刃型の曲線部に刃の継ぎ目が存在する場合、該刃が外に開こうとする応力で、刃のズレが大きくなり易いため、直線部に刃の継ぎ目が存在する場合と比べて、クラックの問題は顕著になると推測される。以下、腐食刃型を代表例として、本願の打ち抜き方法を説明するが、腐食刃型に代えて彫刻刃型を用いても、本願発明の効果が得られることは言うまでもない。 A. Method for punching polarizing plate The method for punching a polarizing plate of the present invention includes punching a polarizing plate with a corroding blade or engraving blade to obtain a polarizing plate having a predetermined shape. The corrosion blade type (so-called Pinnacle blade type, Pinnacle Die (registered trademark)) is a blade type composed of a corrosion blade formed from a metal plate by an etching method. The engraving blade mold is a blade mold composed of an engraving blade formed by cutting a metal plate. The corrosion blade type or the engraving blade type is characterized in that it is constructed seamlessly. In the present invention, the occurrence of cracks in the polarizing plate and the polarizing plate piece can be prevented by punching out the polarizing plate by a punching means having a corroding blade or engraving blade. In the Thomson blade type that has been used in the past, there is a blade seam, and the blade is finely displaced at the joint, and it is assumed that cracks are caused by the displacement due to the impact at the time of punching. Also, when there is a blade seam in the curved part of the Thomson blade type, the blade tends to be misaligned due to the stress that the blade tries to open, so compared to the case where the blade seam exists in the straight part Thus, it is speculated that the problem of cracking will become prominent. Hereinafter, the punching method of the present application will be described using a corroded blade mold as a representative example, but it goes without saying that the effect of the present invention can be obtained even if an engraved blade mold is used instead of the corroded blade mold.
　図１は、本発明の１つの実施形態に用いられる腐食刃型の概略斜視図である。また、図２は、本発明の１つの実施形態に用いられる腐食刃型の概略部分断面図である。腐食刃型１００は、刃部１０と、ベース部２０とから構成される。刃部１０は、平面視において、偏光板片の形状に対応した打ち抜き部１１を規定する。腐食刃型１００上、打ち抜き部１１は複数存在することが好ましい。 FIG. 1 is a schematic perspective view of a corroding blade type used in one embodiment of the present invention. FIG. 2 is a schematic partial sectional view of a corroding blade type used in one embodiment of the present invention. The corrosion blade mold 100 includes a blade portion 10 and a base portion 20. The blade portion 10 defines a punched portion 11 corresponding to the shape of the polarizing plate piece in plan view. It is preferable that a plurality of punched portions 11 exist on the corrosion blade mold 100.
　腐食刃型は、平板状で用いられる形態であってもよく、ロール状で用いられる形態であってもよい。 The corrosion blade type may be a flat plate shape or a roll shape.
　腐食刃型の刃高（図２における高さＡ）は、好ましくは０．３ｍｍ～１０ｍｍであり、より好ましくは０．３５ｍｍ～６ｍｍである。 The blade height (height A in FIG. 2) of the corrosion blade type is preferably 0.3 mm to 10 mm, more preferably 0.35 mm to 6 mm.
　腐食刃型の刃深度（図２における高さＢ）は、好ましくは０．１ｍｍ～４．５ｍｍであり、より好ましくは０．２ｍｍ～２ｍｍである。 The blade depth (height B in FIG. 2) of the corroded blade type is preferably 0.1 mm to 4.5 mm, more preferably 0.2 mm to 2 mm.
　腐食刃型のベース部の厚み（図２における厚みＣ）は、好ましくは０．１ｍｍ～５．５ｍｍであり、より好ましくは０．１３ｍｍ～２ｍｍである。 The thickness of the corroded blade base (thickness C in FIG. 2) is preferably 0.1 mm to 5.5 mm, more preferably 0.13 mm to 2 mm.
　腐食刃型の刃角度（図２における角度Ｄ）は、好ましくは１５°～８０°である。 The blade angle of the corroded blade type (angle D in FIG. 2) is preferably 15 ° to 80 °.
　腐食刃型のロックウェル硬度ＨＲＣは、好ましくは４０°～８０°であり、より好ましくは４５°～７０°である。ロックウェル硬度ＨＲＣは、ＪＩＳ  Ｚ  ２２４５に準拠した方法で測定され得る。 The corrosion well type Rockwell hardness HRC is preferably 40 ° to 80 °, more preferably 45 ° to 70 °. The Rockwell hardness HRC can be measured by a method according to JISＪZ 2245.
　隣り合う打ち抜き部の間隔は、好ましくは０．５ｍｍ～５ｍｍであり、より好ましくは１ｍｍ～３ｍｍである。本発明によれば、クラックの発生を防止することができるため、打ち抜き部を密に設けることができ、歩留まりよく偏光板片を得ることができる。 The interval between adjacent punched portions is preferably 0.5 mm to 5 mm, more preferably 1 mm to 3 mm. According to the present invention, since the generation of cracks can be prevented, the punched portions can be provided densely, and a polarizing plate piece can be obtained with a high yield.
　図３は、１つの実施形態による本発明の偏光板の打ち抜き方法を説明する概略図である。この実施形態においては、ベースプレート２００に上記腐食刃型（平板状の腐食刃型）１００を取り付けて構成される打ち抜き手段３００が用いられる。この実施形態においては、該打ち抜き手段３００下に配置されたカッティングプレート４００上に、偏光板５００を搬送した後、該打ち抜き手段３００を偏光板５００に向け下方に移動させるか、あるいは、カッティングプレート４００を打ち抜き手段３００に向け上方移動させて、腐食刃型１００を偏光板５００に当接させることにより、偏光板５００を打ち抜き、所定形状の偏光板片を得る。 FIG. 3 is a schematic diagram for explaining a method of punching a polarizing plate of the present invention according to one embodiment. In this embodiment, a punching unit 300 configured by attaching the corrosion blade mold (flat corrosion blade mold) 100 to the base plate 200 is used. In this embodiment, after transporting the polarizing plate 500 onto the cutting plate 400 disposed under the punching means 300, the punching means 300 is moved downward toward the polarizing plate 500, or the cutting plate 400 is moved. Is moved upward toward the punching means 300 to bring the corrosion blade mold 100 into contact with the polarizing plate 500, thereby punching out the polarizing plate 500 to obtain a polarizing plate piece having a predetermined shape.
　図４は、別の実施形態による本発明の偏光板の打ち抜き方法を説明する概略図である。この実施形態においては、第１のロール６００の表面に上記腐食刃型１００を貼り付け、ロール状回転刃として構成される打ち抜き手段３００’が用いられる。この実施形態においては、打ち抜き手段３００’と腐食刃型を受ける第２のロール７００とを共に回転させ、当該ロール間に偏光板５００を通すことにより、偏光板５００を打ち抜き、所定形状の偏光板片５１０を得る。この実施形態においては、偏光板の第２のロール側に、搬送基材が配置され得る（図示せず）。第１のロールと第２のロールとのギャップ、および腐食刃型の刃高および刃深度は、搬送基材をフルカットしないように調整され得る。このように調整することにより、搬送基材により偏光板片を次工程に搬送することができる。 FIG. 4 is a schematic diagram for explaining a method for punching a polarizing plate according to another embodiment of the present invention. In this embodiment, the corroding blade mold 100 is attached to the surface of the first roll 600, and punching means 300 'configured as a roll-shaped rotary blade is used. In this embodiment, the punching means 300 ′ and the second roll 700 that receives the corroding blade mold are rotated together, and the polarizing plate 500 is punched by passing the polarizing plate 500 between the rolls. A piece 510 is obtained. In this embodiment, a conveyance base material may be arrange | positioned at the 2nd roll side of a polarizing plate (not shown). The gap between the first roll and the second roll, and the blade height and blade depth of the corroded blade type can be adjusted so as not to fully cut the transport substrate. By adjusting in this way, a polarizing plate piece can be conveyed to the following process with a conveyance base material.
　打ち抜きに供される偏光板は、長尺状であってもよく、枚葉であってもよい。好ましくは、長尺状である。図３に示す実施形態において、長尺状の偏光板を用いる場合、被加工部分をカッティングプレート上に搬送した後に、一旦搬送を止めて上記のように打ち抜き加工を行い、一度の打ち抜き加工完了後、次に打ち抜かれる被加工部分をカッティングプレートに搬送し、次の打ち抜き加工を行うという一連の動作を繰り返して、長尺状偏光板のすべてが打ち抜き加工に供される。また、図４に示す実施形態において、長尺状の偏光板を用いる場合、偏光板を連続的に、共に回転している打ち抜き手段と第２のロールとの間に通すことにより、長尺状偏光板のすべてが打ち抜き加工に供される。 The polarizing plate used for punching may be long or single-wafer. Preferably, it is long. In the embodiment shown in FIG. 3, when a long polarizing plate is used, after the work portion is transported onto the cutting plate, the transport is once stopped and punching is performed as described above, and after the punching is completed once. Then, a series of operations in which the workpiece to be punched next is conveyed to the cutting plate and the next punching is performed is repeated, and all the long polarizing plates are subjected to punching. In the embodiment shown in FIG. 4, when a long polarizing plate is used, the polarizing plate is continuously passed between the punching means rotating together with the second roll, thereby forming the long polarizing plate. All of the polarizing plates are subjected to punching.
　打ち抜かれて得られる偏光板片は、任意の適切な形状であり得る。１つの実施形態においては、偏光板片の外郭は曲線を含む線から構成される。従来から用いられているトムソン刃型は刃の継ぎ目を有しており、トムソン刃型で打ち抜きを行うと、該継ぎ目に起因して、クラックが生じやすいという問題がある。特に、曲線部を有する偏光板片においては、上記刃の継ぎ目が曲線部に位置すると、高頻度でクラックが生じる。一方、本発明においては、従来の矩形状偏光板片の打ち抜きはもとより、曲線部を有する偏光板片の打ち抜きにおいても、クラックを防止することができる。 The polarizing plate piece obtained by punching may have any appropriate shape. In one embodiment, the outer periphery of the polarizing plate piece is composed of a line including a curve. Conventionally used Thomson blade molds have blade joints, and when punched with Thomson blade molds, there is a problem that cracks are likely to occur due to the joints. In particular, in a polarizing plate piece having a curved portion, when the joint of the blade is located in the curved portion, cracks occur frequently. On the other hand, in the present invention, cracks can be prevented not only in the punching of a conventional rectangular polarizing plate piece but also in the punching of a polarizing plate piece having a curved portion.
　１つの実施形態においては、上記偏光板片において、曲線の割合は、上記偏光板の外郭を構成する線の全長に対して、１０％以上である。１つの実施形態においては、上記偏光板片において、曲線の割合は、上記偏光板の外郭を構成する線の全長に対して、３０％以上である。１つの実施形態においては、上記偏光板片において、曲線の割合は、上記偏光板の外郭を構成する線の全長に対して、５０％以上である。１つの実施形態においては、上記偏光板片において、曲線の割合は、上記偏光板の外郭を構成する線の全長に対して、７０％以上である。本発明によれば、曲線割合の高い偏光板片をクラックなく打ち抜くことができる。 In one embodiment, in the polarizing plate piece, the ratio of the curve is 10% or more with respect to the total length of the line constituting the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the ratio of the curve is 30% or more with respect to the total length of the lines constituting the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the proportion of the curve is 50% or more with respect to the total length of the lines that form the outline of the polarizing plate. In one embodiment, in the polarizing plate piece, the ratio of the curve is 70% or more with respect to the total length of the lines constituting the outline of the polarizing plate. According to the present invention, a polarizing plate piece having a high curve ratio can be punched without cracks.
　１つの実施形態においては、上記偏光板片の外郭は曲線のみから構成される。また、上記偏光板の外角は自由曲線から構成されていてもよい。 In one embodiment, the outer periphery of the polarizing plate piece is composed only of a curve. The outer angle of the polarizing plate may be a free curve.
　１つの実施形態においては、上記曲線の曲率半径は、９００ｍｍ以下である。１つの実施形態においては、上記曲線の曲率半径は、６００ｍｍ以下である。１つの実施形態においては、上記曲線の曲率半径は、３００ｍｍ以下である。１つの実施形態においては、上記曲線の曲率半径は、１５０ｍｍ以下である。１つの実施形態においては、上記曲線の曲率半径は、１００ｍｍ以下である。本発明によれば、曲率半径が小さい曲線を含む偏光板片をクラックなく打ち抜くことができる。 In one embodiment, the radius of curvature of the curve is 900 mm or less. In one embodiment, the radius of curvature of the curve is 600 mm or less. In one embodiment, the radius of curvature of the curve is 300 mm or less. In one embodiment, the radius of curvature of the curve is 150 mm or less. In one embodiment, the radius of curvature of the curve is 100 mm or less. According to the present invention, a polarizing plate piece including a curve having a small radius of curvature can be punched without cracks.
　１つの実施形態においては、上記偏光板片は、円形状または楕円形状である。円形状とは略円形状も含む概念であり、楕円形状とは略楕円形状も含む概念である。 In one embodiment, the polarizing plate piece is circular or elliptical. The circular shape is a concept including a substantially circular shape, and the elliptical shape is a concept including a substantially elliptical shape.
　１つの実施形態においては、上記偏光板が円形状の場合、該偏光板の半径Ｒは、９００ｍｍ以下である。１つの実施形態においては、上記偏光板が円形状の場合、該偏光板の半径Ｒは、６００ｍｍ以下である。１つの実施形態においては、上記偏光板が円形状の場合、該偏光板の半径Ｒは、３００ｍｍ以下である。１つの実施形態においては、上記偏光板が円形状の場合、該偏光板の半径Ｒは、１５０ｍｍ以下である。１つの実施形態においては、上記偏光板が円形状の場合、該偏光板の半径Ｒは、１００ｍｍ以下である。本発明によれば、半径Ｒが小さい円形状偏光板片をクラックなく打ち抜くことができる。 In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 900 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 600 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 300 mm or less. In one embodiment, when the polarizing plate is circular, the radius R of the polarizing plate is 150 mm or less. In one embodiment, when the said polarizing plate is circular shape, the radius R of this polarizing plate is 100 mm or less. According to the present invention, a circular polarizing plate piece having a small radius R can be punched without cracks.
Ｂ．打ち抜き装置
　本発明の打ち抜き装置は、偏光板の打ち抜きに用いられる装置であって、腐食刃型または彫刻刃型を備える。腐食刃型または彫刻刃型としては、上記Ａ項で説明した刃型が用いられる。特に腐食刃型は軽量であり、本発明の打ち抜き装置においては、腐食刃型を備える打ち抜き手段を動作させるための機構を単純化することができる。また、腐食刃型は、コストの面でも有利である。 B. Punching device The punching device of the present invention is a device used for punching a polarizing plate, and includes a corroding blade mold or an engraving blade mold. As the corrosion blade mold or the engraving blade mold, the blade mold described in the above section A is used. In particular, the corrosion blade mold is lightweight, and in the punching device of the present invention, the mechanism for operating the punching means provided with the corrosion blade mold can be simplified. Further, the corroded blade type is advantageous in terms of cost.
　１つの実施形態において、本発明の打ち抜き装置は、図３に示すように、ベースプレート２００に上記腐食刃型（平板状の腐食刃型）１００（または彫刻刃型）を取り付けて構成される打ち抜き手段３００と、打ち抜き手段３００に対向配置され、打ち抜き時に腐食刃型１００（または彫刻刃型）を受けるカッティングプレート４００とを備える。 In one embodiment, as shown in FIG. 3, the punching device of the present invention is a punching means configured by attaching the corrosion blade mold (flat corrosion blade mold) 100 (or engraving blade mold) to the base plate 200. 300 and a cutting plate 400 which is disposed opposite to the punching means 300 and receives the corroding blade mold 100 (or engraving blade mold) at the time of punching.
　本実施形態の打ち抜き装置によれば、カッティングプレート４００上に、被加工物である偏光板を載せた後、打ち抜き手段３００をカッティングプレート４００に向け下方に移動させるか、あるいは、カッティングプレート４００を打ち抜き手段３００に向け上方移動させて、腐食刃型１００（または彫刻刃型）を偏光板５００に当接させることにより、偏光板を打ち抜くことができる。打ち抜き手段および／またはカッティングプレートを移動させる手段としては、任意の適切な手段が採用され得る。 According to the punching apparatus of this embodiment, after placing a polarizing plate as a workpiece on the cutting plate 400, the punching means 300 is moved downward toward the cutting plate 400, or the cutting plate 400 is punched out. The polarizing plate can be punched out by moving upward toward the means 300 and bringing the corrosion blade mold 100 (or engraving blade mold) into contact with the polarizing plate 500. Any appropriate means can be adopted as the punching means and / or the means for moving the cutting plate.
　別の実施形態においては、本発明の打ち抜き装置は、図４に示すように、第１のロール６００の表面に上記腐食刃型１００（または彫刻刃型）を貼り付け、ロール状回転刃として構成される打ち抜き手段３００’と、打ち抜き手段３００’に近接して配置され、腐食刃型１００（または彫刻刃型）を受ける第２のロール７００とを備える。腐食刃型または彫刻刃型を第１のロールに貼り付ける方法としては、例えば、第１のロールとしてマグネットロールを用い、磁力により貼り付ける方法が挙げられる。第２のロールとしては、弾性ロールが用いられ得る。 In another embodiment, the punching device of the present invention is configured as a roll-shaped rotary blade by sticking the corrosion blade mold 100 (or engraving blade mold) to the surface of the first roll 600 as shown in FIG. Punching means 300 ′ to be punched out, and a second roll 700 that is disposed in proximity to the punching means 300 ′ and receives the corroding blade mold 100 (or engraving blade mold). Examples of the method of attaching the corroding blade type or the engraving blade type to the first roll include a method of using a magnet roll as the first roll and attaching it by magnetic force. An elastic roll can be used as the second roll.
　本実施形態の打ち抜き装置によれば、共に回転している第１のロール６００（すなわち、打ち抜き手段３００’）と第２のロール７００との間に、被加工物である偏光板を通すことにより、偏光板を打ち抜くことができる。第１のロールおよび第２のロールを回転させる手段としては、任意の適切な手段が採用され得る。また、第１のロールと第２のロールとのギャップは、被加工物である偏光板の厚み、腐食刃型または彫刻刃型の刃高に応じて、任意の適切なギャップに調整され得る。ギャップを調整する手段としては、任意の適切な手段が採用され得る。 According to the punching apparatus of this embodiment, the polarizing plate as the workpiece is passed between the first roll 600 (that is, the punching means 300 ′) and the second roll 700 rotating together. The polarizing plate can be punched out. Any appropriate means can be adopted as the means for rotating the first roll and the second roll. Further, the gap between the first roll and the second roll can be adjusted to any appropriate gap according to the thickness of the polarizing plate, which is a workpiece, and the blade height of the corroding blade or engraving blade. Any appropriate means can be adopted as means for adjusting the gap.
　上記打ち抜き装置は、被加工物を搬送する任意の適切な搬送装置（例えば、搬送ベルト、搬送ロール等）、打ち抜き後に打ち抜きカスを除去する任意の適切な除去装置等と組み合わせて用いられ得る。 The above punching device can be used in combination with any appropriate transporting device (for example, a transporting belt, a transporting roll, etc.) for transporting a workpiece, or any suitable removing device for removing punched debris after punching.
　以下、実施例によって本発明を具体的に説明するが、本発明はこれら実施例によって限定されるものではない。 Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to these examples.
［実施例１］
　図１に示すように、ベース部（３００ｍｍ×２００ｍｍ）に、腐食刃から構成される刃部（曲線部の曲率半径：４１ｍｍ、直線部の長さ：２２ｍｍ、刃部同士の間隔：２ｍｍ、刃深度：３ｍｍ）を複数個備える刃型を用いて、偏光板を打ち抜いた。なお、偏光板は、偏光子（日東電工社製「ＮＺＤ－ＵＦＱＡＭＥＧＱ１７７３ＶＤＵＨＣ－ＡＣＪ」）と保護フィルム（日東電工社製「ＰＰＦ－１００Ｔ」）とから構成される偏光板（厚み：２１９μｍ）を用いた。
　上記の刃型により打ち抜いた偏光板を、ヒートショック試験に供し、試験後の偏光板を目視にて確認したところ、いずれの偏光板にも、偏光板の外郭から長さ０．５ｍｍ以上のクラックは確認されなかった。
　上記ヒートショック試験の条件は、－４０℃（３０分）→８５℃（３０分）→－４０℃（３０分）のヒートサイクルを１００サイクルとした。 [Example 1]
As shown in FIG. 1, a base portion (300 mm × 200 mm) and a blade portion composed of a corroded blade (curvature radius of curvature: 41 mm, length of straight portion: 22 mm, spacing between blade portions: 2 mm, blade The polarizing plate was punched out using a blade type having a plurality of depths: 3 mm. As the polarizing plate, a polarizing plate (thickness: 219 μm) composed of a polarizer (“NZD-UFQAMEGQ1773VDUHC-ACJ” manufactured by Nitto Denko Corporation) and a protective film (“PPF-100T” manufactured by Nitto Denko Corporation) was used. .
The polarizing plate punched out with the above blade mold was subjected to a heat shock test, and the polarizing plate after the test was visually confirmed. Any polarizing plate was cracked by a length of 0.5 mm or more from the outer periphery of the polarizing plate. Was not confirmed.
The conditions of the heat shock test were set to 100 cycles of −40 ° C. (30 minutes) → 85 ° C. (30 minutes) → −40 ° C. (30 minutes).
［比較例１］
　腐食刃に代えて、直線部に継ぎ目のあるトムソン刃から構成される刃部を用いたこと以外は、実施例１と同様にして、すなわち、ベース部（３００ｍｍ×２００ｍｍ）に、該トムソン刃から構成される刃部（曲線部の曲率半径：４１ｍｍ、直線部の長さ：２２ｍｍ、刃部同士の間隔：２ｍｍ、刃深度：３ｍｍ）を複数個備える刃型を用いて、実施例１と同様の偏光板を打ち抜いた。
　上記の刃型により打ち抜いた偏光板を、実施例１と同様の試験に供したところ、偏光板の外郭から長さ０．５ｍｍ以上のクラックが生じた偏光板が確認された。 [Comparative Example 1]
In place of the corroded blade, a blade portion constituted by a Thomson blade having a seam in the straight portion is used in the same manner as in Example 1, that is, the base portion (300 mm × 200 mm) is separated from the Thomson blade. Similar to Example 1 using a blade type having a plurality of blade portions (curvature radius of curvature: 41 mm, length of straight portion: 22 mm, distance between blade portions: 2 mm, blade depth: 3 mm) The polarizing plate was punched out.
When the polarizing plate punched out with the blade type was subjected to the same test as in Example 1, a polarizing plate having a crack of 0.5 mm or more in length from the outer periphery of the polarizing plate was confirmed.
［比較例２］
　腐食刃に代えて、曲線部に継ぎ目のあるトムソン刃から構成される刃部を用いたこと以外は、実施例１と同様にして、すなわち、ベース部（３００ｍｍ×２００ｍｍ）に、該トムソン刃から構成される刃部（曲線部の曲率半径：４１ｍｍ、直線部の長さ：２２ｍｍ、刃部同士の間隔：２ｍｍ、刃深度：３ｍｍ）を複数個備える刃型を用いて、実施例１と同様の偏光板を打ち抜いた。
　上記の刃型により打ち抜いた偏光板を、実施例１と同様の試験に供したところ、偏光板の外郭から長さ０．５ｍｍ以上のクラックが生じた偏光板が確認された。 [Comparative Example 2]
In place of the corroded blade, a blade portion composed of a Thomson blade having a seam in the curved portion is used in the same manner as in Example 1, that is, the base portion (300 mm × 200 mm) is separated from the Thomson blade. Similar to Example 1 using a blade type having a plurality of blade portions (curvature radius of curvature: 41 mm, length of straight portion: 22 mm, distance between blade portions: 2 mm, blade depth: 3 mm) The polarizing plate was punched out.
When the polarizing plate punched out with the blade type was subjected to the same test as in Example 1, a polarizing plate having a crack of 0.5 mm or more in length from the outer periphery of the polarizing plate was confirmed.
１０　　刃部
２０　　ベース部
１００　腐食刃型 10 Blade part 20 Base part 100 Corrosion blade type

Claims (5)

  1. 　腐食刃型または彫刻刃型により偏光板を打ち抜き、所定形状の偏光板片を得ることを含み、
    　該偏光板片の外郭が、曲線を含む線から構成される、
    　偏光板の打ち抜き方法。     Punching the polarizing plate with a corroding blade or engraving blade, and obtaining a polarizing plate of a predetermined shape,
    The outer periphery of the polarizing plate piece is composed of a line including a curve.
    How to punch a polarizing plate.
  2. 　前記曲線の割合が、前記偏光板の外郭を構成する線の全長に対して、１０％以上である、請求項１に記載の偏光板の打ち抜き方法。 2. The method for punching a polarizing plate according to claim 1, wherein a ratio of the curve is 10% or more with respect to a total length of a line constituting an outline of the polarizing plate.
  3. 　前記偏光板片の外郭が、曲線のみから構成される、請求項１に記載の偏光板の打ち抜き方法。 The method for punching a polarizing plate according to claim 1, wherein the outer periphery of the polarizing plate piece is composed only of a curve.
  4. 　前記偏光板片が、円形状または楕円形状である、請求項１に記載の偏光板の打ち抜き方法。 The method for punching a polarizing plate according to claim 1, wherein the polarizing plate piece has a circular shape or an elliptical shape.
  5. 　請求項１から４のいずれかに記載の偏光板の打ち抜き方法に用いる打ち抜き装置であって、
    　腐食刃型または彫刻刃型を備える、
    　打ち抜き装置。     A punching apparatus used for the polarizing plate punching method according to any one of claims 1 to 4,
    With a corroding blade or engraving blade,
    Punching device.
PCT/JP2017/025735 2016-08-02 2017-07-14 Method for punching out polarizing plate, and punching device used in method WO2018025620A1 (en)

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