WO2009081543A1 - Layered sheet and production method for the same - Google Patents

Layered sheet and production method for the same Download PDF

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Publication number
WO2009081543A1
WO2009081543A1 PCT/JP2008/003805 JP2008003805W WO2009081543A1 WO 2009081543 A1 WO2009081543 A1 WO 2009081543A1 JP 2008003805 W JP2008003805 W JP 2008003805W WO 2009081543 A1 WO2009081543 A1 WO 2009081543A1
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WIPO (PCT)
Prior art keywords
sheet
release sheet
adhesive layer
base material
product
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PCT/JP2008/003805
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French (fr)
Japanese (ja)
Inventor
Masahiko Kawano
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Mitsubishi Plastics, Inc.
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Publication of WO2009081543A1 publication Critical patent/WO2009081543A1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • G11B7/2542—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/256—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers improving adhesion between layers

Definitions

  • the present invention relates to a laminated sheet obtained by laminating a product part composed of an adhesive layer and a substrate on a long release sheet, and a method for producing the same.
  • an optical disk may be provided with a cover sheet to protect the light receiving surface.
  • a cover sheet is provided, for example, in a state of a laminated sheet prepared in plural on the release sheet at appropriate intervals. Since this laminated sheet is wound up in a roll shape, the cover sheet may be marked by winding pressure, or the adhesive of the adhesive layer may protrude and the cover sheet may become soiled. Further, there is a problem that foreign matter or the like is caught during winding and a cover mark or a scratch is generated on the cover sheet. In recent years, in the Blu-ray disc that has been developed, if there is such a mark or scratch, there is a possibility that data reading / writing may be hindered.
  • JP 2004-35836 A JP 2004-95013 A JP 2005-216440 A JP 2006-224581 A JP 2007-12230 A
  • the required release sheet Since the laminated sheet described in Document 5 is folded back, the required release sheet has a large area, which is also not preferable from an economic viewpoint. Moreover, the release sheet used for these is wound up and discarded after the cover sheet is peeled off. At this time, from the viewpoint of resource recycling, it is not preferable to leave an edge that is a separate material from the release sheet or to add a protective material because it makes recycling difficult.
  • an object of the present invention is to provide a laminated sheet and a method for manufacturing the same, in which the length of punching and half-cutting is shortened as much as possible, and generation of marks and scratches due to winding pressure is prevented.
  • the present invention employs the following configurations (1) to (7).
  • the laminated sheet according to (1), wherein the protective part has an uneven structure in which the unevenness is continuous.
  • the protective part is the laminated sheet according to (1) or (2) provided by an ultrasonic welding apparatus.
  • a base material is laminated on a long release sheet via an adhesive layer, and a product part is formed by half-cutting the base material and the adhesive layer, and the part other than the product part of the base material and the adhesive layer.
  • a method for producing a laminated sheet in which an unnecessary part is peeled and removed, and then a protective part having a height higher than the thickness of the product part is formed on the front surface side or the back surface side by forming on both ends in the width direction of the release sheet.
  • the product part is formed in plural in the length direction of the release sheet at appropriate intervals, and unnecessary parts other than the product part of the base material and the adhesive layer are peeled and removed, and then molded on both ends of the release sheet in the width direction.
  • a method for producing a laminated sheet which is processed to form a protective part having a height higher than the thickness of the product part on the front side or the back side.
  • the “height of the protective part” refers to the height from the surface of the release sheet when the protective part is formed on the surface side of the release sheet, and the protective part is formed on the back side of the release sheet. In the case, it means the height from the back surface of the release sheet.
  • the laminated sheet of the present invention is formed with a protective part having a height exceeding the thickness of the product part by shaping on both end sides in the width direction of the release sheet, and when the protective part is wound, the protective part receives a winding pressure. It is possible to prevent the product part from being scratched or scratched, and it is possible to prevent the product part from being scratched or scratched without using other members or increasing the area of the release sheet as in the past. This is preferable from the economical viewpoint.
  • the method for producing a laminated sheet of the present invention half-cuts or punches out only the part that becomes the product part, there is little risk of debris being generated, and there is less risk of being damaged or soiled by the debris. .
  • FIG. 1 is a schematic perspective view schematically showing a laminated sheet according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the laminated sheet of FIG.
  • the laminated sheet 1 has a disk-shaped product portion 5 composed of an adhesive layer 3 and a substrate 4 on a long release sheet 2.
  • a plurality of protective portions 6 are formed in the length direction at appropriate intervals, and the protective portions 6 that are raised on the surface side are formed on both end portions in the width direction of the release sheet 2.
  • the product portion 5 is a disc-shaped cover sheet used for an optical disc such as a Blu-ray disc.
  • the present invention is not limited to this, and various shapes can be used.
  • thermoplastic resin film As the release sheet 2, a thermoplastic resin film can be used.
  • a resin film such as a polyethylene terephthalate film, a polyester film, or a polypropylene film can be used.
  • a release agent such as a silicon-based material is applied to the surface of these resin films to perform a release treatment.
  • coated the silicone type release agent on the surface of the polyethylene terephthalate film is preferable.
  • the thickness of the release sheet 2 is preferably 38 ⁇ m to 200 ⁇ m, particularly 50 ⁇ m to 100 ⁇ m.
  • the pressure-sensitive adhesive layer 3 can be formed from a pressure-sensitive adhesive or an adhesive.
  • a pressure-sensitive adhesive or adhesive for example, acrylic, rubber-based, silicon-based, urethane-based, polyester-based, or the like can be used. Among these, it is preferable to use an acrylic pressure-sensitive adhesive.
  • the thickness of the pressure-sensitive adhesive layer 3 is 5 ⁇ m to 50 ⁇ m, particularly preferably 10 ⁇ m to 30 ⁇ m, although it depends on the laminate on which the product part 5 is laminated.
  • Substrate 4 As the base material 4, for example, a polyethylene terephthalate, polycarbonate, polystyrene, polyethylene, polypropylene, vinyl chloride, polyimide, a resin film made of a UV curable resin mainly composed of urethane acrylate and epoxy acrylate, or a laminate thereof is used. It can. Among these, a UV curable resin mainly composed of urethane acrylate and epoxy acrylate is preferable.
  • the thickness of the substrate 4 is preferably 25 ⁇ m to 250 ⁇ m, more preferably 50 ⁇ m to 100 ⁇ m, although it depends on the application.
  • the protection part 6 is formed as a concavo-convex structure in which the concavo-convex is continuous in the length direction of the release sheet 2 on both ends in the width direction of the release sheet 2.
  • the height of the protective part 6 is formed so as to exceed the thickness of the product part 5, and is preferably formed 20 ⁇ m to 50 ⁇ m higher than the thickness of the product part 5.
  • the width of the protective part 6 is preferably 10 mm to 4 mm, particularly 8 mm to 6 mm.
  • the protection part 6 can be formed by shaping with a press device or an ultrasonic welding device. Especially, it is preferable to use an ultrasonic welding apparatus, and thereby, it is possible to easily form the release sheet 2 with an appropriate height.
  • the ultrasonic welding apparatus melts the release sheet 2 by ultrasonic vibration of a vibration part called a tool horn, and processes it into an arbitrary shape depending on the shape of the tool horn itself and the shape of the pressurizing part facing the tool horn.
  • a vibration part called a tool horn
  • the type using a roller-shaped processed part for the pressurizing part (generally called an ultrasonic sewing machine) is more suitable because it can be molded while continuously feeding the release sheet 2. is there.
  • Specific examples of the ultrasonic sewing machine include PUS-2150 manufactured by Proco.
  • the protective part 6 is raised on the front side of the release sheet 2, but as shown in FIG. 3, it can be a protective part 6a raised on the back side. .
  • the height of the protective part 6 a is 20 ⁇ m to 50 ⁇ m higher than the thickness of the product part 5.
  • the protective portion 6 is formed by raising substantially rectangular convex portions at appropriate intervals.
  • the present invention is not limited to this, and a substantially circular convex portion is formed. It can be formed by raising at an appropriate interval, or can be raised so that the convex portions are connected.
  • the protection part 6 is formed in a line at the one side edge part of the peeling sheet 2, as shown in FIG. 4, it arrange
  • An adhesive or adhesive is applied to one side of the long release sheet 2 to form the adhesive layer 3.
  • This application is preferably performed by a lip coater.
  • a substrate 4 is laminated on the formed adhesive layer 3. At this time, it is preferable to laminate while pressing. From the base material 4 side of this laminate, as shown in FIG. 5 (a), the vicinity of the middle in the width direction of the release sheet 2 is punched into a circular shape at a predetermined interval, and the base material 4 and the adhesive layer 3 are half-cut. A punched portion and a concentric cut are formed to form a disc-shaped product portion 5.
  • the laminated sheet 1 can be manufactured by forming and forming the protection part 6 on the both ends in the width direction of the release sheet 2.
  • the protective part 6 can be formed by forming with a press device or an ultrasonic welding device, and among these, it is preferable to use an ultrasonic welding device.
  • the ultrasonic welding apparatus for example, it is preferable to perform a shaping process at a speed of 2 to 20 m / min, preferably 5 to 15 m / min by transmitting an ultrasonic wave of 20 kHz.
  • this laminated sheet 1 is formed with the protective part 6 having a height exceeding the thickness of the product part 5 on the release sheet 2, the product part 5 is not compressed even if it is rolled up. Therefore, the product part 5 is not scratched or scratched, and the adhesive does not protrude. Further, in the above manufacturing method, since only the part of the product part 5 is half-cut or punched out, it is difficult for debris to be produced, and the product part 5 is less likely to be stained.
  • Example 1 On the release-treated surface of a release sheet (thickness: 75 ⁇ m) coated with a silicon release agent on one side of a polyethylene terephthalate film, an acrylic adhesive was applied with a lip coater to form an adhesive layer having a DRY thickness of 20 ⁇ m.
  • a base material having a thickness of 80 ⁇ m made of a UV curable resin mainly composed of urethane acrylate and epoxy acrylate was pressure-bonded to the adhesive layer to prepare a laminate having a width of 150 mm and a length of 150 m.
  • a tool horn rotary ultrasonic welding device also known as an ultrasonic sewing machine, manufactured by Proco, Inc .: PUS-2150
  • the speed is increased by a roller while continuously feeding to both ends of the release sheet in the width direction.
  • Continuous unevenness molding was performed under the conditions of 9 m / min, pressure of 0.15 MPa, and output of 500 W, and a protective sheet was formed to form a laminated sheet.
  • the laminated sheet was wound around a plastic core having a diameter of 6 inches to obtain a roll wound body.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention provides a layered sheet that prevents an impression, a scratch, and the like from being caused by winding pressure while minimizing the punching and half cutting length. A layered sheet 1 of the invention has a structure in which a plurality of product portions 5, each having a predetermined shape and including an adhesive layer 3 and a base material 4, are arranged at appropriate intervals on a long releasing sheet 2 in a length direction of the releasing sheet 2. Protective portions 6 having a height larger than a thickness of the product portions 5 are formed on a front side or a back side of the releasing sheet 2 by shaping both widthwise ends of the releasing sheet 2.

Description

積層シート及びその製造方法Laminated sheet and manufacturing method thereof
　本発明は、長尺の剥離シート上に粘着層及び基材からなる製品部を積層した積層シート及びその製造方法に関する。 The present invention relates to a laminated sheet obtained by laminating a product part composed of an adhesive layer and a substrate on a long release sheet, and a method for producing the same.
　従来、光ディスクには、受光面を保護するためカバーシートを設けてあることがある。
　このようなカバーシートは、例えば、剥離シート上に適宜間隔で複数作成した積層シートの状態で提供される。この積層シートは、ロール状に巻き取られていくため、巻圧によりカバーシートに痕がついたり、粘着層の粘着剤がはみ出してカバーシートに汚れが付着したりすることがあった。また、巻取り時に異物等が挟み込まれ、カバーシートに押し痕や傷などが発生したりするなどの問題があった。
　近年、開発されてきたブルーレイディスクでは、このような痕や傷などがあると、データの読み書きに支障が生じるおそれがある。 Conventionally, an optical disk may be provided with a cover sheet to protect the light receiving surface.
Such a cover sheet is provided, for example, in a state of a laminated sheet prepared in plural on the release sheet at appropriate intervals. Since this laminated sheet is wound up in a roll shape, the cover sheet may be marked by winding pressure, or the adhesive of the adhesive layer may protrude and the cover sheet may become soiled. Further, there is a problem that foreign matter or the like is caught during winding and a cover mark or a scratch is generated on the cover sheet.
In recent years, in the Blu-ray disc that has been developed, if there is such a mark or scratch, there is a possibility that data reading / writing may be hindered.
　そこで、巻き取りした際、粘着剤をはみ出させず、カバーシートに痕や傷などが付かなくするため、下記特許文献１～３に示すように、ハーフカットにより縁部を残したり、縁部にテープ状の保護材を貼り付けたりした積層シートや、特許文献４に示すように、ハーフカットにより縁部を隆起させた積層シートや、特許文献５に示すように、剥離シートの縁部を折り返した積層シートなどが開発されている。 Therefore, when winding, in order to prevent the adhesive from sticking out and to prevent the cover sheet from being scratched or scratched, as shown in the following Patent Documents 1 to 3, the edge is left by half-cutting, Laminated sheet with tape-like protective material attached, laminated sheet with edge raised by half-cut as shown in Patent Document 4, and edge of release sheet folded back as shown in Patent Document 5 Laminated sheets have been developed.
特開２００４－３５８３６号公報JP 2004-35836 A 特開２００４－９５０１３号公報JP 2004-95013 A 特開２００５－２１６４４０号公報JP 2005-216440 A 特開２００６－２２４５８１号公報JP 2006-224581 A 特開２００７－１２２３０号公報JP 2007-12230 A
　積層シートに、打ち抜き又はハーフカットを施すことは、打ち抜きカスが発生するおそれがある。特に、基材にＵＶ硬化樹脂を設けた積層シートに打ち抜き又はハーフカットを施す場合はカスが発生しやすく、このカスがカバーシートに付着して汚したり、傷つけたりするおそれがある。
　上記特許文献１～４に記載の積層シートは、カバーシートを切り抜く以外にも縁部を残すため、或いは縁部に隆起部を設けるためにハーフカットを施すので、カスが発生しやすいものである。
　また、上記特許文献１に記載の積層シートは、縁部にテープ状の保護材を設けものも開示されているが、別部材を付加する必要があるため、経済的観点から好ましくなく、上記特許文献５に記載の積層シートは、縁部を折り返すため、必要とする剥離シートの面積が広くなり、これも経済的観点から好ましくない。
　また、これらに使用する剥離シートは、カバーシート剥離後、巻き取られて廃棄処分とされる。この際、資源の再利用化の観点より、剥離シートと別材料となる縁部を残したり、保護材を付加することは、再利用を困難にさせる為、好ましくない。 If punching or half-cutting is performed on the laminated sheet, there is a risk that punching residue will be generated. In particular, when punching or half-cutting a laminated sheet provided with a UV curable resin on a base material, scum is likely to be generated, and this scum may adhere to the cover sheet and become dirty or damaged.
The laminated sheets described in the above-mentioned Patent Documents 1 to 4 are liable to generate debris because half cutting is performed in order to leave an edge in addition to cutting out the cover sheet or to provide a raised portion at the edge. .
Moreover, although the laminated sheet described in Patent Document 1 is also disclosed in which a tape-shaped protective material is provided at the edge, it is not preferable from an economic viewpoint because it is necessary to add another member. Since the laminated sheet described in Document 5 is folded back, the required release sheet has a large area, which is also not preferable from an economic viewpoint.
Moreover, the release sheet used for these is wound up and discarded after the cover sheet is peeled off. At this time, from the viewpoint of resource recycling, it is not preferable to leave an edge that is a separate material from the release sheet or to add a protective material because it makes recycling difficult.
　そこで、本発明の目的は、打ち抜き及びハーフカットをする長さを極力短くしつつ、巻圧による痕や傷などの発生を防止した積層シート及びその製造方法を提供することにある。 Therefore, an object of the present invention is to provide a laminated sheet and a method for manufacturing the same, in which the length of punching and half-cutting is shortened as much as possible, and generation of marks and scratches due to winding pressure is prevented.
　本発明は、下記（１）～（７）の構成を採用するものである。
（１）長尺の剥離シート上に粘着層と基材とからなる所定形状の製品部を剥離シートの長さ方向に適宜間隔で複数形成した構成を備えた積層シートであって、剥離シートの幅方向両端部側に賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成した積層シート。
（２）保護部は、凹凸が連続する凹凸構造とした（１）に記載の積層シート。
（３）保護部は、超音波溶着装置により設けた（１）又は（２）に記載の積層シート。
（４）長尺の剥離シート上に粘着層を介して基材を積層し、基材及び粘着層にハーフカットして製品部を形成し、基材及び粘着層の製品部以外の部分である不要部を剥離除去した後、剥離シートの幅方向両端部側に賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成する積層シートの製造方法。
（５）長尺の剥離シート上に粘着層を介して基材を積層し、剥離シートの幅方向中間付近を円形状に打ち抜くとともに、基材及び粘着層に打ち抜き部分と同心円状にハーフカットして製品部を剥離シートの長さ方向に適宜間隔で複数形成し、基材及び粘着層の製品部以外の部分である不要部を剥離除去した後、剥離シートの幅方向両端部側に賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成する積層シートの製造方法。
（６）保護部は、凹凸が連続する凹凸構造とした（４）又は（５）に記載の積層シートの製造方法。
（７）保護部は、超音波溶着装置により設けた（４）～（６）のいずれかに記載の積層シートの製造方法。 The present invention employs the following configurations (1) to (7).
(1) A laminated sheet having a structure in which a plurality of product parts having a predetermined shape composed of an adhesive layer and a base material are formed on a long release sheet at appropriate intervals in the length direction of the release sheet. A laminated sheet in which a protective part having a height higher than the thickness of the product part is formed on the front surface side or the back surface side by forming on both ends in the width direction.
(2) The laminated sheet according to (1), wherein the protective part has an uneven structure in which the unevenness is continuous.
(3) The protective part is the laminated sheet according to (1) or (2) provided by an ultrasonic welding apparatus.
(4) A base material is laminated on a long release sheet via an adhesive layer, and a product part is formed by half-cutting the base material and the adhesive layer, and the part other than the product part of the base material and the adhesive layer. A method for producing a laminated sheet in which an unnecessary part is peeled and removed, and then a protective part having a height higher than the thickness of the product part is formed on the front surface side or the back surface side by forming on both ends in the width direction of the release sheet.
(5) Laminate the base material via the adhesive layer on the long release sheet, punch out the middle part in the width direction of the release sheet in a circular shape, and half cut concentrically with the punched portion in the base material and the adhesive layer The product part is formed in plural in the length direction of the release sheet at appropriate intervals, and unnecessary parts other than the product part of the base material and the adhesive layer are peeled and removed, and then molded on both ends of the release sheet in the width direction. A method for producing a laminated sheet, which is processed to form a protective part having a height higher than the thickness of the product part on the front side or the back side.
(6) The method for producing a laminated sheet according to (4) or (5), wherein the protective part has an uneven structure in which unevenness is continuous.
(7) The method for producing a laminated sheet according to any one of (4) to (6), wherein the protective part is provided by an ultrasonic welding apparatus.
　なお、本発明でいう「保護部の高さ」は、保護部を剥離シートの表面側に形成した場合は剥離シートの表面からの高さをいい、保護部を剥離シートの裏面側に形成した場合は剥離シートの裏面からの高さをいう。 In the present invention, the “height of the protective part” refers to the height from the surface of the release sheet when the protective part is formed on the surface side of the release sheet, and the protective part is formed on the back side of the release sheet. In the case, it means the height from the back surface of the release sheet.
　本発明の積層シートは、剥離シートの幅方向両端部側に賦型により製品部の厚みを超える高さの保護部を形成してあり、巻取りした際、保護部が巻圧を受けるので、製品部に痕や傷などが付くことを防止することができ、また、従来のように、他部材を用いることや剥離シートの面積を広くせずとも製品部に痕や傷などが付くことを防止でき、経済的観点から好ましいものである。
　また、本発明の積層シートの製造方法は、製品部となる部分のみをハーフカット或いは打ち抜きするので、カスが発生するおそれが少なく、カスにより傷がついたり、汚れたりするおそれが少ないものである。 The laminated sheet of the present invention is formed with a protective part having a height exceeding the thickness of the product part by shaping on both end sides in the width direction of the release sheet, and when the protective part is wound, the protective part receives a winding pressure. It is possible to prevent the product part from being scratched or scratched, and it is possible to prevent the product part from being scratched or scratched without using other members or increasing the area of the release sheet as in the past. This is preferable from the economical viewpoint.
In addition, since the method for producing a laminated sheet of the present invention half-cuts or punches out only the part that becomes the product part, there is little risk of debris being generated, and there is less risk of being damaged or soiled by the debris. .
本発明の積層シートの一実施形態を示した概略斜視図である。It is the schematic perspective view which showed one Embodiment of the lamination sheet of this invention. 図１の積層シートの横断面図である。It is a cross-sectional view of the laminated sheet of FIG. 本発明の積層シートの他の実施形態を示した横断面図である。It is the cross-sectional view which showed other embodiment of the lamination sheet of this invention. 本発明の積層シートの他の実施形態を示した概略斜視図である。It is the schematic perspective view which showed other embodiment of the lamination sheet of this invention. 本発明の積層シートの製造方法の一例を示した図である。It is the figure which showed an example of the manufacturing method of the lamination sheet of this invention.
　以下、本発明を実施形態に基づいて説明するが、本発明の範囲が下記実施形態に限定されるものではない。
　図１は本発明の一実施形態の積層シートを模式的に示した概略斜視図であり、図２は図１の積層シートの横断面図である。 Hereinafter, although this invention is demonstrated based on embodiment, the scope of the present invention is not limited to the following embodiment.
FIG. 1 is a schematic perspective view schematically showing a laminated sheet according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the laminated sheet of FIG.
　本発明の一実施形態の積層シート１は、図１又は２に示すように、長尺の剥離シート２上に、粘着層３及び基材４からなる円盤状の製品部５を剥離シート２の長さ方向に適宜間隔で複数形成してあり、剥離シート２の幅方向両端部側に、表面側に隆起する保護部６を賦型加工して形成してあるものである。
　なお、本実施形態では、製品部５をブルーレイディスクなどの光学ディスクに用いる円盤状のカバーシートとしてあるが、これに限定するものではなく、種々の形状とすることができる As shown in FIG. 1 or 2, the laminated sheet 1 according to an embodiment of the present invention has a disk-shaped product portion 5 composed of an adhesive layer 3 and a substrate 4 on a long release sheet 2. A plurality of protective portions 6 are formed in the length direction at appropriate intervals, and the protective portions 6 that are raised on the surface side are formed on both end portions in the width direction of the release sheet 2.
In this embodiment, the product portion 5 is a disc-shaped cover sheet used for an optical disc such as a Blu-ray disc. However, the present invention is not limited to this, and various shapes can be used.
（剥離シート２）
　剥離シート２としては、熱可塑性樹脂フィルムを使用することができ、例えば、ポリエチレンテレフタレートフィルム、ポリエステルフィルム、ポリプロピレンフィルムなどの樹脂フィルムを用いることができる。
　これら樹脂フィルム表面には、シリコン系などの剥離剤を塗布し、剥離処理してあるのが好ましい。なかでも、ポリエチレンテレフタレートフィルムの表面にシリコン系剥離剤を塗布したものが好ましい。
　剥離シート２の厚みは、３８μｍ～２００μｍ、特に５０μｍ～１００μｍとするのが好ましい。 (Peeling sheet 2)
As the release sheet 2, a thermoplastic resin film can be used. For example, a resin film such as a polyethylene terephthalate film, a polyester film, or a polypropylene film can be used.
It is preferable that a release agent such as a silicon-based material is applied to the surface of these resin films to perform a release treatment. Especially, what apply | coated the silicone type release agent on the surface of the polyethylene terephthalate film is preferable.
The thickness of the release sheet 2 is preferably 38 μm to 200 μm, particularly 50 μm to 100 μm.
（粘着層３）
　粘着層３は、粘着剤又は接着剤から形成することができ、この粘着剤又は接着剤としては、例えば、アクリル系、ゴム系、シリコン系、ウレタン系、ポリエステル系などを用いることができる。なかでも、アクリル系粘着剤を用いるのが好ましい。
　粘着層３の厚みは、製品部５を積層する被積層体によるが、５μｍ～５０μｍ、特に１０μｍ～３０μｍとするのが好ましい。 (Adhesive layer 3)
The pressure-sensitive adhesive layer 3 can be formed from a pressure-sensitive adhesive or an adhesive. As this pressure-sensitive adhesive or adhesive, for example, acrylic, rubber-based, silicon-based, urethane-based, polyester-based, or the like can be used. Among these, it is preferable to use an acrylic pressure-sensitive adhesive.
The thickness of the pressure-sensitive adhesive layer 3 is 5 μm to 50 μm, particularly preferably 10 μm to 30 μm, although it depends on the laminate on which the product part 5 is laminated.
（基材４）
　基材４は、例えば、ポリエチレンテレフタレート、ポリカーボネート、ポリスチレン、ポリエチレン、ポリプロピレン、塩化ビニル、ポリイミド、ウレタンアクリレートとエポキシアクリレートを主成分とするＵＶ硬化樹脂などからなる樹脂フィルム又はこれらの積層体を用いることができる。なかでも、ウレタンアクリレートとエポキシアクリレートを主成分とするＵＶ硬化樹脂が好ましい。
　基材４の厚みは、用途にもよるが、２５μｍ～２５０μｍ、特に５０μｍ～１００μｍとするのが好ましい。 (Substrate 4)
As the base material 4, for example, a polyethylene terephthalate, polycarbonate, polystyrene, polyethylene, polypropylene, vinyl chloride, polyimide, a resin film made of a UV curable resin mainly composed of urethane acrylate and epoxy acrylate, or a laminate thereof is used. it can. Among these, a UV curable resin mainly composed of urethane acrylate and epoxy acrylate is preferable.
The thickness of the substrate 4 is preferably 25 μm to 250 μm, more preferably 50 μm to 100 μm, although it depends on the application.
（保護部６）
　保護部６は、剥離シート２の幅方向両端部側に、剥離シート２の長さ方向に凹凸の連続する凹凸構造として形成してある。保護部６の高さは、製品部５の厚みを超えるように形成してあり、製品部５の厚みよりも２０μｍ～５０μｍ高く形成するのが好ましい。保護部６の幅は、１０ｍｍ～４ｍｍ、特に８ｍｍ～６ｍｍとするのが好ましい。
　保護部６は、プレス装置や超音波溶着装置などで賦型加工して形成することができる。なかでも、超音波溶着装置を用いるのが好ましく、これにより、剥離シート２に適宜高さの賦型を施すことが容易にできる。
　なお、超音波溶着装置とは、剥離シート２を工具ホーンと呼ばれる振動部の超音波振動により溶融させ、工具ホーン自体の形状や工具ホーンと相対する加圧部の形状により任意の形状に加工するものである。
　中でも加圧部にローラー状の加工部を用いるタイプ（一般に超音波ミシンと呼ばれている）のものは、剥離シート２を連続的に送りながら、賦型加工することができるため、より好適である。
　超音波ミシンは具体的には、株式会社プロコ製ＰＵＳ－２１５０などがある。 (Protection part 6)
The protection part 6 is formed as a concavo-convex structure in which the concavo-convex is continuous in the length direction of the release sheet 2 on both ends in the width direction of the release sheet 2. The height of the protective part 6 is formed so as to exceed the thickness of the product part 5, and is preferably formed 20 μm to 50 μm higher than the thickness of the product part 5. The width of the protective part 6 is preferably 10 mm to 4 mm, particularly 8 mm to 6 mm.
The protection part 6 can be formed by shaping with a press device or an ultrasonic welding device. Especially, it is preferable to use an ultrasonic welding apparatus, and thereby, it is possible to easily form the release sheet 2 with an appropriate height.
The ultrasonic welding apparatus melts the release sheet 2 by ultrasonic vibration of a vibration part called a tool horn, and processes it into an arbitrary shape depending on the shape of the tool horn itself and the shape of the pressurizing part facing the tool horn. Is.
Among them, the type using a roller-shaped processed part for the pressurizing part (generally called an ultrasonic sewing machine) is more suitable because it can be molded while continuously feeding the release sheet 2. is there.
Specific examples of the ultrasonic sewing machine include PUS-2150 manufactured by Proco.
　図１又は２に示した実施形態では、保護部６は、剥離シート２の表面側に隆起させているが、図３に示すように、裏面側に隆起させた保護部６ａとすることができる。この際、保護部６ａの高さは、製品部５の厚みよりも２０μｍ～５０μｍ高く形成するのが好ましい。 In the embodiment shown in FIG. 1 or 2, the protective part 6 is raised on the front side of the release sheet 2, but as shown in FIG. 3, it can be a protective part 6a raised on the back side. . At this time, it is preferable that the height of the protective part 6 a is 20 μm to 50 μm higher than the thickness of the product part 5.
　図１又は２に示した実施形態では、保護部６を、略矩形状の凸部を適宜間隔で隆起させて形成してあるが、これに限定するものではなく、略円状の凸部を適宜間隔で隆起させて形成することや凸部が連なるように隆起させて形成することもできる。また、保護部６を、剥離シート２の片側端部に一列形成してあるが、図４に示すように、直線状に配して形成し、その内側にも、製品部５の外周に沿うように円弧状に配して形成した二列の保護部６ｂとすることもできる。 In the embodiment shown in FIG. 1 or 2, the protective portion 6 is formed by raising substantially rectangular convex portions at appropriate intervals. However, the present invention is not limited to this, and a substantially circular convex portion is formed. It can be formed by raising at an appropriate interval, or can be raised so that the convex portions are connected. Moreover, although the protection part 6 is formed in a line at the one side edge part of the peeling sheet 2, as shown in FIG. 4, it arrange | positions and forms linearly, and it follows the outer periphery of the product part 5 also inside. Thus, it is possible to form two rows of protection portions 6b formed in an arc shape.
（製造方法）
　以下、積層シート１の製造方法の一例を説明する。
　長尺の剥離シート２の片面に粘着剤又は接着剤を塗布して粘着層３を形成する。この塗布は、リップコーターで行うのが好ましい。形成した粘着層３上に基材４を積層する。この際、圧着しながら積層するのが好ましい。
　この積層体の基材４側から、図５（ａ）に示すように、剥離シート２の幅方向中間付近を所定の間隔で円形状に打ち抜くとともに基材４及び粘着層３をハーフカットして打ち抜き部分と同心円状の切れ込みを形成し、円盤状の製品部５を形成する。
　次に、図５（ｂ）に示すように、基材４及び粘着層３の製品部５部分以外の不要部８を剥離除去する。
　そして、図５（ｃ）に示すように、剥離シート２の幅方向両端部側に、賦型加工して保護部６を形成し、積層シート１を製造することができる。
　保護部６は、前述したとおり、プレス装置や超音波溶着装置などで賦型加工して形成することができ、なかでも、超音波溶着装置を用いるのが好ましい。
　超音波溶着装置を用いた際は、例えば、２０ｋＨｚの超音波を発信させ、２～２０ｍ／ｍｉｎ、好ましくは５～１５ｍ／ｍｉｎの速さで賦型加工をするのが好ましい。 (Production method)
Hereinafter, an example of the manufacturing method of the lamination sheet 1 is demonstrated.
An adhesive or adhesive is applied to one side of the long release sheet 2 to form the adhesive layer 3. This application is preferably performed by a lip coater. A substrate 4 is laminated on the formed adhesive layer 3. At this time, it is preferable to laminate while pressing.
From the base material 4 side of this laminate, as shown in FIG. 5 (a), the vicinity of the middle in the width direction of the release sheet 2 is punched into a circular shape at a predetermined interval, and the base material 4 and the adhesive layer 3 are half-cut. A punched portion and a concentric cut are formed to form a disc-shaped product portion 5.
Next, as shown in FIG.5 (b), the unnecessary parts 8 other than the product part 5 part of the base material 4 and the adhesion layer 3 are peeled and removed.
And as shown in FIG.5 (c), the laminated sheet 1 can be manufactured by forming and forming the protection part 6 on the both ends in the width direction of the release sheet 2.
As described above, the protective part 6 can be formed by forming with a press device or an ultrasonic welding device, and among these, it is preferable to use an ultrasonic welding device.
When the ultrasonic welding apparatus is used, for example, it is preferable to perform a shaping process at a speed of 2 to 20 m / min, preferably 5 to 15 m / min by transmitting an ultrasonic wave of 20 kHz.
　この積層シート１は、剥離シート２に製品部５の厚みを越える高さの保護部６を賦型してあるため、ロール状に巻取りしても、製品部５が圧迫されることがないので、製品部５に痕や傷が付いたり、粘着剤がはみ出したりすることがない。
　また、上記製造方法は、ハーフカット或いは打ち抜くのは製品部５の箇所のみなので、カスが出にくく、製品部５を汚すおそれが少ない。 Since this laminated sheet 1 is formed with the protective part 6 having a height exceeding the thickness of the product part 5 on the release sheet 2, the product part 5 is not compressed even if it is rolled up. Therefore, the product part 5 is not scratched or scratched, and the adhesive does not protrude.
Further, in the above manufacturing method, since only the part of the product part 5 is half-cut or punched out, it is difficult for debris to be produced, and the product part 5 is less likely to be stained.
　以下、実施例を示すが、本発明の範囲が下記実施例に限定されるものではない。 Examples are shown below, but the scope of the present invention is not limited to the following examples.
（実施例１）
　ポリエチレンテレフタレートフィルムの片面にシリコン系剥離剤を塗布した剥離シート（厚さ：７５μｍ）の剥離処理面上に、アクリル系粘着剤をリップコーターにより塗布してＤＲＹ厚２０μｍの粘着層を形成した。
　粘着層に、ウレタンアクリレートとエポキシアクリレートを主成分とするＵＶ硬化樹脂からなる厚さ８０μｍの基材を圧着し、幅１５０ｍｍ、長さ１５０ｍの積層体を作製した。 Example 1
On the release-treated surface of a release sheet (thickness: 75 μm) coated with a silicon release agent on one side of a polyethylene terephthalate film, an acrylic adhesive was applied with a lip coater to form an adhesive layer having a DRY thickness of 20 μm.
A base material having a thickness of 80 μm made of a UV curable resin mainly composed of urethane acrylate and epoxy acrylate was pressure-bonded to the adhesive layer to prepare a laminate having a width of 150 mm and a length of 150 m.
　次に、連続打抜き装置（富士商工マシナリー株式会社製：UDP-3000）を用いて、積層体の幅方向中間付近を円形状に打ち抜くとともに、基材及び粘着層をハーフカットして円形状に切れ込みを入れ、外径１２０ｍｍ、内径２３ｍｍの円盤状の製品部を一定間隔で複数形成した後、製品部以外の部分の不要部を剥離除去した。 Next, using a continuous punching device (made by Fuji Shoko Machinery Co., Ltd .: UDP-3000), the middle of the laminate in the width direction is punched in a circular shape, and the base material and adhesive layer are cut into a circular shape by half-cutting. After forming a plurality of disk-shaped product parts having an outer diameter of 120 mm and an inner diameter of 23 mm at regular intervals, unnecessary parts other than the product parts were peeled off.
　続いて、工具ホーン回転式超音波溶着装置（別名：超音波ミシン、株式会社プロコ製：PUS-2150）を用いて、剥離シートの幅方向両端部側に、連続して送りながらローラーにより、速度９ｍ／ｍｉｎ、加圧０．１５ＭＰａ、出力５００Ｗの条件で連続凹凸賦型を行い、保護部を形成して積層シートを形成した。
　この積層シートを、直径６インチのプラスチック製巻芯に巻取り、ロール巻取体とした。 Subsequently, using a tool horn rotary ultrasonic welding device (also known as an ultrasonic sewing machine, manufactured by Proco, Inc .: PUS-2150), the speed is increased by a roller while continuously feeding to both ends of the release sheet in the width direction. Continuous unevenness molding was performed under the conditions of 9 m / min, pressure of 0.15 MPa, and output of 500 W, and a protective sheet was formed to form a laminated sheet.
The laminated sheet was wound around a plastic core having a diameter of 6 inches to obtain a roll wound body.
　このロール巻取体を１週間放置し、製品部に痕、傷、汚れなどが付いていないかを目視で確認したところ、そのようなものは見られなかった。 When this roll wound body was left for one week, and it was visually confirmed that there were no marks, scratches, dirt, etc. on the product part, such a thing was not seen.

Claims (7)

  1. 　長尺の剥離シート上に粘着層と基材とからなる所定形状の製品部を剥離シートの長さ方向に適宜間隔で複数形成した構成を備えた積層シートであって、剥離シートの幅方向両端部側に、賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成した積層シート。 A laminated sheet having a configuration in which a plurality of product parts having a predetermined shape composed of an adhesive layer and a base material are formed on a long release sheet at appropriate intervals in the length direction of the release sheet, both ends of the release sheet in the width direction A laminated sheet in which a protective part having a height higher than the thickness of the product part is formed on the front side or the back side by molding on the part side.
  2. 　保護部は、凹凸が連続する凹凸構造とした請求項１に記載の積層シート。 The laminated sheet according to claim 1, wherein the protective part has an uneven structure in which unevenness is continuous.
  3. 　保護部は、超音波溶着装置により設けた請求項１又は２に記載の積層シート。 The laminated sheet according to claim 1 or 2, wherein the protective part is provided by an ultrasonic welding apparatus.
  4. 　長尺の剥離シート上に粘着層を介して基材を積層し、基材及び粘着層をハーフカットして製品部を形成し、基材及び粘着層の製品部以外の部分である不要部を剥離除去した後、剥離シートの幅方向両端部側に、賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成する積層シートの製造方法。 A base material is laminated on a long release sheet via an adhesive layer, the base material and the adhesive layer are half-cut to form a product part, and unnecessary parts other than the product part of the base material and the adhesive layer are formed. A method for producing a laminated sheet in which a protective part having a height higher than the thickness of a product part is formed on the front surface side or the back surface side after forming by peeling and removing on both ends in the width direction of the release sheet.
  5. 　長尺の剥離シート上に粘着層を介して基材を積層し、剥離シートの幅方向中間付近を円形状に打ち抜くとともに基材及び粘着層を打ち抜き部分と同心円状にハーフカットして製品部を剥離シートの長さ方向に適宜間隔で複数形成し、基材及び粘着層の製品部以外の部分である不要部を剥離除去した後、剥離シートの幅方向両端部側に賦型加工して製品部の厚みよりも高さのある保護部を表面側又は裏面側に形成する積層シートの製造方法。 Laminate the base material via the adhesive layer on the long release sheet, punch out the middle part in the width direction of the release sheet in a circular shape, and half-cut the base material and the adhesive layer concentrically with the punched part. A plurality of products are formed at appropriate intervals in the length direction of the release sheet, and after removing unnecessary parts other than the product parts of the base material and the adhesive layer, molding is performed on both ends of the release sheet in the width direction. The manufacturing method of the lamination sheet which forms the protection part which is higher than the thickness of a part in the surface side or a back surface side.
  6. 　保護部は、凹凸が連続する凹凸構造とした請求項４又は５に記載の積層シートの製造方法。 The method for producing a laminated sheet according to claim 4 or 5, wherein the protective part has an uneven structure in which the unevenness is continuous.
  7. 　保護部は、超音波溶着装置により設けた請求項４～６のいずれかに記載の積層シートの製造方法。

          The method for producing a laminated sheet according to any one of claims 4 to 6, wherein the protective part is provided by an ultrasonic welding apparatus.

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