WO2022113706A1 - Label and method for producing labels - Google Patents

Label and method for producing labels Download PDF

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Publication number
WO2022113706A1
WO2022113706A1 PCT/JP2021/040908 JP2021040908W WO2022113706A1 WO 2022113706 A1 WO2022113706 A1 WO 2022113706A1 JP 2021040908 W JP2021040908 W JP 2021040908W WO 2022113706 A1 WO2022113706 A1 WO 2022113706A1
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WO
WIPO (PCT)
Prior art keywords
layer
label
intermediate layer
color
developing
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PCT/JP2021/040908
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French (fr)
Japanese (ja)
Inventor
大貴 田中
彰 宮崎
直樹 大西
英訓 土橋
Original Assignee
株式会社フジシールインターナショナル
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Priority to JP2022565190A priority Critical patent/JPWO2022113706A1/ja
Publication of WO2022113706A1 publication Critical patent/WO2022113706A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions

Definitions

  • This disclosure relates to labels and labels manufacturing methods.
  • the method of printing the ink on the surface of the label base material by a method such as an inkjet printer or a thermal printer is the mainstream.
  • the print may disappear due to the rubbing of the ink on the label during transportation of the product with the label attached.
  • laser printing can be provided on the outer surface of the label by irradiating the laser beam from the outside of the label.
  • laser printing on the inner surface of the label by irradiating the laser beam from the inside of the label to shield the laser printing on the inside of the label from the outside of the label.
  • Patent Document 1 discloses a laminated film for laser printing in which a white ink layer, a printing agent layer, a printing pattern layer, and a plastic film are laminated in this order from the side irradiated with the laser beam.
  • the laser printing provided on the inner printing agent layer may be seen through from the plastic film on the outer side of the laminated film.
  • the base material is provided with a base material, a first intermediate layer on the base material, a second intermediate layer on the first intermediate layer, and a coloring layer on the second intermediate layer.
  • the color-developing layer can exhibit a color-developing display by irradiation with a laser beam
  • the first intermediate layer can shield the color-developing display in the color-developing layer from the substrate side
  • the second intermediate layer is in the color-developing layer from the color-developing layer side. It is possible to provide a label capable of enhancing the visibility of the color display.
  • a step of forming a first intermediate layer on a base material, a step of forming a second intermediate layer on the first intermediate layer, and a color-developing layer on the second intermediate layer are provided.
  • the first intermediate layer can shield the color development display in the color development layer from the substrate side, and includes a step of forming and a step of expressing the color development display by irradiating the color development layer with a laser beam.
  • the intermediate layer can provide a method for manufacturing a label capable of enhancing the visibility of the color development display in the color development layer from the color development layer side.
  • the laser printing on the inside of the label can be shielded from the outside of the label, and the laser printing can be clearly confirmed from the inside of the label.
  • a manufacturing method can be provided.
  • FIG. 3 is a schematic cross-sectional view of an example of a label of an embodiment.
  • 6 is a histogram showing the absorbance of the labels of Examples 1 to 10.
  • FIG. 1 shows a schematic cross-sectional view of an example of a label of an embodiment.
  • Label 1 of the embodiment shown in FIG. 1 includes a base material 11, a design layer 12 on the base material 11, a first intermediate layer 13 on the design layer 12, and a second intermediate layer on the first intermediate layer 13. 14 and a color-developing layer 15 on the second intermediate layer 14.
  • the base material 11 side is the outside and the coloring layer 15 is the inside.
  • the base material 11 is a plastic film containing at least a resin capable of supporting the first intermediate layer 13, the second intermediate layer 14, and the coloring layer 15.
  • the plastic film constituting the base material 11 can be transparent.
  • the total light transmittance of the base material 11 is preferably 70% or more, more preferably 80% or more, still more preferably 90% or more. Total light transmittance is measured by JIS K 7105 (optical property test method for plastics).
  • polyester resin polyethylene terephthalate, polyethylene naphthalate, polylactic acid, etc.
  • polystyrene resin polystyrene, styrene-butadiene copolymer, etc.
  • polyolefin resin polyolefin resin.
  • Resins polyethylene, polypropylene, etc.
  • polyvinyl chloride resins polyamide resins, aramid resins, polyimide resins, polyphenylene sulfide resins, acrylic resins and the like can be used.
  • the plastic film constituting the base material 11 may contain one kind of these resins, or may contain two or more kinds of these resins.
  • the base material 11 may be, for example, a heat-shrinkable plastic film (shrink film).
  • shrink film heat-shrinkable plastic film
  • the label 1 can be attached to the container by heat-shrinking the base material 11 after covering the container with the label 1.
  • the base material 11 may be, for example, a non-heat shrinkable plastic film.
  • a non-heat shrinkable plastic film for example, a wrapping label that can be wrapped around the outer surface of the container, a tack label that can be attached to the outer surface of the container, or a flat bag, a gusset bag, or a bag.
  • Label 1 can be used as a flexible packaging bag such as a bag or a pouch.
  • the base material 11 may be a single-layer film composed of one layer or a multilayer film composed of two or more layers. Further, the thickness of the base material 11 can be, for example, 5 ⁇ m or more and 100 ⁇ m or less.
  • the first intermediate layer 13 is a layer capable of shielding the color development display in the color development layer 15 from the base material 11 side.
  • the color display in the color layer from the base material side can be shielded means that the color display is actually formed even if the color display (laser printing) is not actually formed in the color layer. Assuming, it means that the color display of the color-developing layer cannot be recognized visually from the substrate side.
  • an ink coating film containing a coloring pigment can be used as the first intermediate layer 13, for example.
  • a coloring pigment of the ink coating film constituting the first intermediate layer 13 for example, indigo, crimson, yellow, black, dark grass, silver, gold or gray may be used as a single color or a combination of a plurality of colors. Can be done.
  • the components other than the coloring pigment contained in the ink coating film constituting the first intermediate layer 13 include a binder resin and the like.
  • the first intermediate layer 13 is an ink coating film containing a coloring pigment having a relatively low transmittance of visible light incident from the base material 11 side and a relatively small absorbance of laser light incident from the color developing layer 15 side. It is preferable to use. As such a coloring pigment, it is preferable to use a silver, gold, or gray coloring pigment, and it is more preferable to use a silver or gray coloring pigment. In this case, the first intermediate layer 13 can shield the color development display on the color development layer 15 from the base material 11 side, and absorbs the laser light emitted from the color development layer 15 side to some extent to generate heat and develop color. It is possible to assist in forming a color display (laser printing) on the layer 15 side.
  • a coloring pigment it is preferable to use a silver, gold, or gray coloring pigment, and it is more preferable to use a silver or gray coloring pigment.
  • the first intermediate layer 13 can shield the color development display on the color development layer 15 from the base material 11 side, and absorbs the laser light emitted from
  • the transmittance of visible light emitted from the base material 11 side of the first intermediate layer 13 is too high, it may not be possible to sufficiently shield the color development display in the color development layer 15 from the base material 11 side. If the absorptivity of the laser light emitted from the color-developing layer 15 side of the first intermediate layer 13 is too high, the amount of the laser light absorbed by the first intermediate layer 13 becomes too large, and the label 1 is deteriorated by heat. Alternatively, the label 1 may be melted to form holes in the label 1.
  • the absorbance of the laser light of Label 1 (light having a wavelength of 950 nm or more and a wavelength of 1400 nm or less) is preferably larger than 0.22, more preferably 0.24 or more, and more preferably 0.40 or more. Especially preferable.
  • the absorbance of the laser beam of the label 1 is larger than 0.22, more preferably 0.24 or more, and particularly preferably 0.40 or more, the color-developing layer 15 from the base material 11 side.
  • the color development display can be shielded, and the color development layer 15 can be heated to a temperature suitable for expressing the color development display in the color development layer 15 by heating by irradiation with a laser beam.
  • the absorbance of the laser beam of Label 1 (wavelength 950 nm or more and wavelength 1400 nm or less) is preferably less than 0.92, more preferably 0.6 or less, and particularly preferably 0.55 or less. In these cases, it is possible to shield the color development display on the color development layer 15 from the base material 11 side, and the temperature of the first intermediate layer 13 becomes too high due to heating by irradiation with a laser beam, so that the label 1 can be melted. The sex can be reduced.
  • the first intermediate layer 13 may have a function of reflecting laser light emitted from the color developing layer 15 side.
  • the laser light emitted from the color-developing layer 15 side and transmitted through the color-developing layer 15 and the second intermediate layer 14 can be reflected by the first intermediate layer 13 and returned to the color-developing layer 15.
  • the color-developing layer 15 can absorb the reflected light of the laser beam to generate heat again, so that the color-developing display can be expressed more clearly.
  • the second intermediate layer 14 is a layer capable of enhancing the visibility of the color development display in the color development layer 15.
  • "it is possible to improve the visibility of the color development display in the color development layer from the color development layer side” means that the label is provided with the second intermediate layer and the label is provided with the second intermediate layer.
  • the label is provided with the second intermediate layer, the color display formed on the color-developing layer can be more clearly recognized visually from the color-developing layer side of the label, as compared with the case where the label is not provided. Means to have.
  • an ink coating film containing a coloring pigment can be used as the second intermediate layer 14.
  • a coloring pigment of the ink coating film constituting the second intermediate layer 14 for example, a light color such as light yellow or light red or white or the like can be used.
  • the components other than the coloring pigment contained in the ink coating film constituting the second intermediate layer 14 include a binder resin and the like.
  • the second intermediate layer 14 it is preferable to use an ink coating film containing a coloring pigment capable of enhancing the visibility of the color development display on the color development layer 15 from the color development layer 15 side.
  • a white solid ink layer can be used.
  • the second intermediate layer 14 is a white solid ink layer.
  • the color-developing layer 15 is a layer capable of exhibiting a color-developing display by irradiation with a laser beam.
  • the color display can be expressed by irradiating the laser light is assumed that the color-developing layer 15 is actually irradiated with the laser light even if the color-developing layer 15 is not actually irradiated with the laser light. In some cases, it means that the portion irradiated with the laser beam has a property of being able to generate a color (discoloration).
  • a color-developing coating film capable of exhibiting color development by irradiation with laser light can be used without particular limitation.
  • a color-developing coating film constituting the color-developing layer 15 a color-developing coating film containing a leuco dye that enables color change by irradiation with a laser beam can be used.
  • a layer that is transparent before irradiation with a laser beam, the portion irradiated with the laser beam is heated to become black, and the blackened portion becomes a color-developing display can be used.
  • the design layer 12 is a layer having a design that can be visually recognized from the base material 11 side.
  • the design layer 12 can be located between the base material 11 of the label 1 and the first intermediate layer 13, as shown in FIG. 1, for example, but is not limited thereto. Further, the label 1 does not have to include the design layer 12.
  • the design layer 12 can be a layer capable of suppressing heat generation due to irradiation with laser light.
  • the design layer 12 is a layer capable of suppressing heat generation due to irradiation with laser light, the possibility of melting of the label 1 due to the design layer 12 absorbing the laser light and generating heat can be reduced.
  • the design layer 12 contains a pigment capable of suppressing absorption of laser light.
  • a pigment capable of suppressing absorption of laser light.
  • the design layer 12 may generate too much heat due to irradiation with laser light, so that the design layer 12 may be replaced with carbon black. It is preferable to mix black with a pigment (for example, yellow, indigo, red, etc.) that absorbs less in the wavelength range of the laser light.
  • Label 1 may further include other layers.
  • the positions and materials of the other layers are not particularly limited, but for example, the color ink layer, the outside of the base material 11 (the side opposite to the side where the first intermediate layer 13 is located), or the inside of the coloring layer 15 (the first). 2
  • a protective layer such as medium for protecting the label 1 from external factors can be mentioned.
  • Label 1 of the embodiment can be manufactured, for example, as follows. First, a step of preparing the base material 11 is performed. The step of preparing the base material 11 is, for example, by molding a plastic film by a method such as an extrusion method or a calender method, and if necessary, further applying a stretching treatment to the plastic film. It can be carried out.
  • the ink resin composition for the first intermediate layer which is a precursor of the ink coating film constituting the first intermediate layer 13 is applied onto the surface of the base material 11 and then dried. It can be done by letting it.
  • a step of forming the design layer 12 on the surface of the base material 11 is performed.
  • the step of forming the design layer 12 can be performed, for example, by gravure printing, flexographic printing, inkjet printing, screen printing, or offset printing of the ink resin composition that is the precursor of the design layer 12.
  • the ink resin composition for the second intermediate layer which is a precursor of the ink coating film constituting the second intermediate layer 14 is applied onto the surface of the base material 11 and then dried. It can be done by letting it.
  • a step of forming the color-developing layer 15 on the surface of the second intermediate layer 14 is performed.
  • the step of forming the color-developing layer 15 is performed, for example, by applying a resin composition for a color-developing coating film, which is a precursor of the color-developing coating film constituting the color-developing layer 15, onto the surface of the second intermediate layer 14 and then drying the resin composition. be able to.
  • the label 1 of the embodiment can be manufactured.
  • the label 1 of the embodiment includes a first intermediate layer 13 capable of shielding the color development display in the color development layer 15 from the base material 11 side between the base material 11 and the color development layer 15. Therefore, in the label 1 of the embodiment, the color development display on the color development layer 15 from the base material 11 side cannot be shielded, that is, visually confirmed.
  • the label 1 of the embodiment has a second intermediate layer 14 between the first intermediate layer 13 and the color-developing layer 15 which can enhance the visibility of the color-developing display in the color-developing layer 15 from the color-developing layer 15 side. I have. Therefore, in the label 1 of the embodiment, the color development display on the color development layer 15 from the color development layer 15 side can be clearly confirmed visually.
  • the label 1 of the embodiment it is possible to shield the laser printing inside the label 1 from the outside of the label 1, and the laser printing can be clearly confirmed from the inside of the label 1.
  • a substrate made of a transparent polystyrene film having a thickness of 45 ⁇ m was prepared.
  • an ink resin composition for a first intermediate layer containing a silver coloring pigment on one surface of the substrate is applied onto one surface of the substrate and then dried to obtain a silver color having a thickness of 3 to 5 ⁇ m.
  • the first intermediate layer of the above was formed.
  • an ink resin composition for a second intermediate layer containing a white coloring pigment is applied onto one surface of the substrate and then dried on the surface of the side on which the substrate of the first intermediate layer is not formed.
  • a white second intermediate layer having a thickness of 3 to 5 ⁇ m composed of a white solid ink layer was formed.
  • a resin composition for a color-developing coating film which is a precursor of the color-developing coating film constituting the color-developing layer, is applied onto the surface of the second intermediate layer on the side where the first intermediate layer is not formed, and then dried.
  • a transparent coloring layer was formed.
  • Example 1 was prepared by applying a transparent medium on the surface on the side where the second intermediate layer of the coloring layer was not formed.
  • Example 2 ⁇ Preparation of Label of Example 2> Under the same method and conditions as in Example 1 except that an indigo color ink layer having a thickness of 3 to 5 ⁇ m was formed between the base material and the first intermediate layer and the first intermediate layer was made silver. The label of Example 2 was prepared.
  • Example 3 ⁇ Preparation of Label of Example 3> The label of Example 3 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was colored gold.
  • Example 4 ⁇ Preparation of Label of Example 4> The label of Example 4 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was grayed out.
  • the label of Comparative Example 1 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was indigo.
  • the label of Comparative Example 4 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was made black. As the material of the black first intermediate layer, black ink using carbon black was used.
  • Laser printing is formed by irradiating the coloring layer of each label with near infrared rays having a wavelength of 950 nm from the coloring layer side of the labels of Examples 1 to 4 and Comparative Examples 1 to 5, and then laser printing from the coloring layer side of the label.
  • the visibility of the above was visually evaluated according to the following criteria A to C.
  • the results are shown in Tables 1 and 2.
  • "A” in the "Laser printing visibility” column of Tables 1 and 2 indicates that the laser printing (black) could be clearly seen sufficiently by the contrast (white) with the second intermediate layer, and "B".
  • "" Indicates that the laser printing could be visually recognized by the contrast with the second intermediate layer
  • "C” indicates that the laser printing could not be sufficiently visually recognized even with the contrast with the second intermediate layer.
  • the labels of Examples 1 to 4 having an absorbance greater than 0.22 and 0.55 or less, particularly 0.24 or more and 0.55 or less, are labels of Comparative Examples 1 to 5 having an absorbance of 0.22 or less. It was also confirmed that both the shielding property of the laser printing by the first intermediate layer and the visibility of the laser printing by the second intermediate layer can be improved as compared with the above.
  • the labels of Examples 1, 2 and 4 having an absorbance of 0.40 or more and 0.55 or less have a shielding of laser printing by the first intermediate layer as compared with the label of Example 3 having an absorbance of 0.24. It was also confirmed that both the sex and the visibility of the laser printing by the second intermediate layer can be improved.

Abstract

Provided are a label with which it is possible to shield laser printing on the inside of the label from the outside of the label and to clearly confirm laser printing from the inside of the label, and a method for producing the label.　This label (1) comprises a base material (11), an first intermediate layer (13) on the base material (11), a second intermediate layer (14) on the first intermediate layer (13), and a color-developing layer (15) on the second intermediate layer (14). The color-developing layer (15) is capable of exhibiting chromogenic display due to irradiation with a laser beam. The first intermediate layer (13) is capable of shielding chromogenic display in the color-developing layer (15) from the base-material (11) side. The second intermediate layer (14) is capable of heightening the visibility of chromogenic display in the color-developing layer (15) from the color-developing-layer (15) side.

Description

ラベルおよびラベルの製造方法Labels and how to manufacture labels
　本開示は、ラベルおよびラベルの製造方法に関する。 This disclosure relates to labels and labels manufacturing methods.
　ラベルに対して賞味期限等の印字を施す際には、たとえばインクジェットプリンタまたはサーマルプリンタ等の手法でラベル基材の表面にインキを印刷する方法が主流となっている。 When printing the expiration date etc. on the label, the method of printing the ink on the surface of the label base material by a method such as an inkjet printer or a thermal printer is the mainstream.
　しかしながら、ラベルが装着された製品の輸送時におけるラベルのインキの擦れ等によって印字が消失することがあった。 However, the print may disappear due to the rubbing of the ink on the label during transportation of the product with the label attached.
　そこで、ラベルの印字については、一旦印字が施された後に消失しにくい印字の需要が存在している。その需要を満たすための１つの方法として、レーザ光の照射により印字するレーザ印字法が検討されている。 Therefore, with regard to label printing, there is a demand for printing that does not easily disappear after being printed once. As one method for satisfying the demand, a laser printing method for printing by irradiation with a laser beam is being studied.
　レーザ印字法においては、ラベルの外側からレーザ光を照射することによってラベルの外表面にレーザ印字を設けることができる。また、ラベルの内側からレーザ光を照射することによってラベルの内表面にレーザ印字を設け、ラベルの外側からラベルの内側のレーザ印字を遮蔽することの需要も存在している。 In the laser printing method, laser printing can be provided on the outer surface of the label by irradiating the laser beam from the outside of the label. There is also a demand for laser printing on the inner surface of the label by irradiating the laser beam from the inside of the label to shield the laser printing on the inside of the label from the outside of the label.
　たとえば特許文献１には、レーザ光を照射する側から、白インキ層、印字剤層、印刷絵柄層、およびプラスチックフィルムの順に積層されているレーザー印字用積層フィルムが開示されている。 For example, Patent Document 1 discloses a laminated film for laser printing in which a white ink layer, a printing agent layer, a printing pattern layer, and a plastic film are laminated in this order from the side irradiated with the laser beam.
特開２０１７－１２４４９９号公報JP-A-2017-124499
　しかしながら、特許文献１に記載の積層フィルムにおいては、積層フィルムの外側のプラスチックフィルムから内側の印字剤層に設けられたレーザ印字が透けて見えることがあった。 However, in the laminated film described in Patent Document 1, the laser printing provided on the inner printing agent layer may be seen through from the plastic film on the outer side of the laminated film.
　ここで開示された実施形態によれば、基材と、基材上の第１中間層と、第１中間層上の第２中間層と、第２中間層上の発色層と、を備え、発色層はレーザ光の照射により発色表示を発現可能であり、第１中間層は基材側からの発色層における発色表示を遮蔽可能であり、第２中間層は発色層側からの発色層における発色表示の視認性を高めることが可能であるラベルを提供することができる。 According to the embodiment disclosed herein, the base material is provided with a base material, a first intermediate layer on the base material, a second intermediate layer on the first intermediate layer, and a coloring layer on the second intermediate layer. The color-developing layer can exhibit a color-developing display by irradiation with a laser beam, the first intermediate layer can shield the color-developing display in the color-developing layer from the substrate side, and the second intermediate layer is in the color-developing layer from the color-developing layer side. It is possible to provide a label capable of enhancing the visibility of the color display.
　ここで開示された実施形態によれば、基材上に第１中間層を形成する工程と、第１中間層上に第２中間層を形成する工程と、第２中間層上に発色層を形成する工程と、発色層にレーザ光を照射することによって発色表示を発現させる工程と、を含み、第１中間層は、基材側からの発色層における発色表示を遮蔽可能であり、第２中間層は、発色層側からの発色層における発色表示の視認性を高めることが可能であるラベルの製造方法を提供することができる。 According to the embodiment disclosed here, a step of forming a first intermediate layer on a base material, a step of forming a second intermediate layer on the first intermediate layer, and a color-developing layer on the second intermediate layer are provided. The first intermediate layer can shield the color development display in the color development layer from the substrate side, and includes a step of forming and a step of expressing the color development display by irradiating the color development layer with a laser beam. The intermediate layer can provide a method for manufacturing a label capable of enhancing the visibility of the color development display in the color development layer from the color development layer side.
　ここで開示された実施形態によれば、ラベルの外側からラベルの内側のレーザ印字を遮蔽することが可能であるとともに、ラベルの内側からレーザ印字を明確に確認することが可能なラベルおよびラベルの製造方法を提供することができる。 According to the embodiments disclosed herein, the laser printing on the inside of the label can be shielded from the outside of the label, and the laser printing can be clearly confirmed from the inside of the label. A manufacturing method can be provided.
実施形態のラベルの一例の模式的な断面図である。FIG. 3 is a schematic cross-sectional view of an example of a label of an embodiment. 実施例１～１０のラベルの吸光度を示すヒストグラムである。6 is a histogram showing the absorbance of the labels of Examples 1 to 10.
　以下、実施形態について説明する。なお、実施形態の説明に用いられる図面において、同一の参照符号は、同一部分または相当部分を表わすものとする。 Hereinafter, embodiments will be described. In the drawings used in the description of the embodiment, the same reference numerals represent the same parts or corresponding parts.
　＜ラベル＞
　図１に、実施形態のラベルの一例の模式的な断面図を示す。図１に示される実施形態のラベル１は、基材１１と、基材１１上のデザイン層１２と、デザイン層１２上の第１中間層１３と、第１中間層１３上の第２中間層１４と、第２中間層１４上の発色層１５とを備えている。実施形態のラベル１において、基材１１側が外側であり、発色層１５が内側である。 <Label>
FIG. 1 shows a schematic cross-sectional view of an example of a label of an embodiment. Label 1 of the embodiment shown in FIG. 1 includes a base material 11, a design layer 12 on the base material 11, a first intermediate layer 13 on the design layer 12, and a second intermediate layer on the first intermediate layer 13. 14 and a color-developing layer 15 on the second intermediate layer 14. In the label 1 of the embodiment, the base material 11 side is the outside and the coloring layer 15 is the inside.
　＜基材＞
　基材１１は、少なくとも、第１中間層１３と、第２中間層１４と、発色層１５と、を支持可能な樹脂を含むプラスチックフィルムである。基材１１を構成するプラスチックフィルムは透明であり得る。基材１１が透明である場合の基材１１の全光線透過率は７０％以上であることが好ましく、８０％以上であることがより好ましく、９０％以上であることがさらに好ましい。全光線透過率は、ＪＩＳ　Ｋ　７１０５（プラスチックの光学的特性試験方法）により測定される。 <Base material>
The base material 11 is a plastic film containing at least a resin capable of supporting the first intermediate layer 13, the second intermediate layer 14, and the coloring layer 15. The plastic film constituting the base material 11 can be transparent. When the base material 11 is transparent, the total light transmittance of the base material 11 is preferably 70% or more, more preferably 80% or more, still more preferably 90% or more. Total light transmittance is measured by JIS K 7105 (optical property test method for plastics).
　基材１１を構成するプラスチックフィルムに含まれる樹脂としては、たとえば、ポリエステル系樹脂（ポリエチレンテレフタレート、ポリエチレンナフタレート、ポリ乳酸等）、ポリスチレン系樹脂（ポリスチレン、スチレン－ブタジエン共重合体等）、ポリオレフィン系樹脂（ポリエチレン、ポリプロピレン等）、ポリ塩化ビニル系樹脂、ポリアミド系樹脂、アラミド系樹脂、ポリイミド系樹脂、ポリフェニレンスルフィド系樹脂、またはアクリル系樹脂等を用いることができる。基材１１を構成するプラスチックフィルムは、これらの樹脂の１種類を含んでいてもよく、２種類以上を含んでいてもよい。 Examples of the resin contained in the plastic film constituting the base material 11 include polyester resin (polyethylene terephthalate, polyethylene naphthalate, polylactic acid, etc.), polystyrene resin (polystyrene, styrene-butadiene copolymer, etc.), and polyolefin resin. Resins (polyethylene, polypropylene, etc.), polyvinyl chloride resins, polyamide resins, aramid resins, polyimide resins, polyphenylene sulfide resins, acrylic resins and the like can be used. The plastic film constituting the base material 11 may contain one kind of these resins, or may contain two or more kinds of these resins.
　基材１１は、たとえば、熱収縮性のプラスチックフィルム（シュリンクフィルム）であってもよい。基材１１がシュリンクフィルムである場合には、たとえば、ラベル１を容器に被せた後に基材１１を熱収縮させることによって、ラベル１を容器に装着可能とすることができる。 The base material 11 may be, for example, a heat-shrinkable plastic film (shrink film). When the base material 11 is a shrink film, for example, the label 1 can be attached to the container by heat-shrinking the base material 11 after covering the container with the label 1.
　基材１１は、たとえば、非熱収縮性のプラスチックフィルムであってもよい。基材１１が非熱収縮性のプラスチックフィルムである場合には、たとえば、容器の外表面に巻き付け可能な巻き付けラベル、容器の外表面に貼り付け可能なタックラベル、または平袋、ガゼット袋、ピロー袋若しくはパウチ等の軟包装袋としてラベル１を用いることができる。 The base material 11 may be, for example, a non-heat shrinkable plastic film. When the base material 11 is a non-heat shrinkable plastic film, for example, a wrapping label that can be wrapped around the outer surface of the container, a tack label that can be attached to the outer surface of the container, or a flat bag, a gusset bag, or a bag. Label 1 can be used as a flexible packaging bag such as a bag or a pouch.
　基材１１は、１層からなる単層フィルムであってもよく、２層以上からなる多層フィルムであってもよい。また、基材１１の厚さは、たとえば、５μｍ以上１００μｍ以下とすることができる。 The base material 11 may be a single-layer film composed of one layer or a multilayer film composed of two or more layers. Further, the thickness of the base material 11 can be, for example, 5 μm or more and 100 μm or less.
　＜第１中間層＞
　第１中間層１３は、基材１１側からの発色層１５における発色表示を遮蔽可能な層である。本実施形態において、「基材側からの発色層における発色表示を遮蔽可能」とは、実際に発色層に発色表示（レーザ印字）が形成されていなくても、実際に発色表示が形成されたと仮定した場合に、基材側からの目視により発色層の発色表示を認識できない性質を有していることを意味する。 <First middle layer>
The first intermediate layer 13 is a layer capable of shielding the color development display in the color development layer 15 from the base material 11 side. In the present embodiment, "the color display in the color layer from the base material side can be shielded" means that the color display is actually formed even if the color display (laser printing) is not actually formed in the color layer. Assuming, it means that the color display of the color-developing layer cannot be recognized visually from the substrate side.
　第１中間層１３としては、たとえば、着色顔料を含むインキ塗膜を用いることができる。第１中間層１３を構成するインキ塗膜の着色顔料としては、たとえば、藍色、紅色、黄色、墨色、濃草色、銀色、金色若しくは灰色を単色で若しくは複数色を組み合わせたもの等を用いることができる。第１中間層１３を構成するインキ塗膜に含まれる着色顔料以外の成分としては、たとえば、バインダ樹脂等を挙げることができる。 As the first intermediate layer 13, for example, an ink coating film containing a coloring pigment can be used. As the coloring pigment of the ink coating film constituting the first intermediate layer 13, for example, indigo, crimson, yellow, black, dark grass, silver, gold or gray may be used as a single color or a combination of a plurality of colors. Can be done. Examples of the components other than the coloring pigment contained in the ink coating film constituting the first intermediate layer 13 include a binder resin and the like.
　なかでも、第１中間層１３としては、基材１１側から入射する可視光の透過率が比較的低く、発色層１５側から入射するレーザ光の吸光度が比較的小さい着色顔料を含むインキ塗膜を用いることが好ましい。このような着色顔料としては、銀色、金色、または灰色の着色顔料を用いることが好ましく、銀色または灰色の着色顔料を用いることがより好ましい。この場合には、第１中間層１３は、基材１１側からの発色層１５における発色表示を遮蔽可能であるとともに、発色層１５側から照射されたレーザ光をある程度吸収して発熱して発色層１５側に発色表示（レーザ印字）が形成されるのを補助することができる。第１中間層１３の基材１１側から照射された可視光の透過率が高すぎる場合には、基材１１側からの発色層１５における発色表示を十分に遮蔽することができないことがある。第１中間層１３の発色層１５側から照射されたレーザ光の吸光度が高すぎる場合には、第１中間層１３によるレーザ光の吸収量が大きくなりすぎて、ラベル１が熱で劣化する、若しくはラベル１が溶融してラベル１に孔が形成されることがある。 Among them, the first intermediate layer 13 is an ink coating film containing a coloring pigment having a relatively low transmittance of visible light incident from the base material 11 side and a relatively small absorbance of laser light incident from the color developing layer 15 side. It is preferable to use. As such a coloring pigment, it is preferable to use a silver, gold, or gray coloring pigment, and it is more preferable to use a silver or gray coloring pigment. In this case, the first intermediate layer 13 can shield the color development display on the color development layer 15 from the base material 11 side, and absorbs the laser light emitted from the color development layer 15 side to some extent to generate heat and develop color. It is possible to assist in forming a color display (laser printing) on the layer 15 side. If the transmittance of visible light emitted from the base material 11 side of the first intermediate layer 13 is too high, it may not be possible to sufficiently shield the color development display in the color development layer 15 from the base material 11 side. If the absorptivity of the laser light emitted from the color-developing layer 15 side of the first intermediate layer 13 is too high, the amount of the laser light absorbed by the first intermediate layer 13 becomes too large, and the label 1 is deteriorated by heat. Alternatively, the label 1 may be melted to form holes in the label 1.
　なお、ラベル１のレーザ光（波長９５０ｎｍ以上波長１４００ｎｍ以下の光）の吸光度は、０．２２よりも大きいことが好ましく、０．２４以上であることがより好ましく、０．４０以上であることが特に好ましい。ラベル１のレーザ光の吸光度が０．２２よりも大きい場合、より好ましくは０．２４以上である場合、特に好ましくは０．４０以上である場合には、基材１１側からの発色層１５における発色表示を遮蔽可能であるとともに、レーザ光の照射による加熱によって発色層１５における発色表示を発現するのに適した温度に発色層１５を加熱することが可能となる。 The absorbance of the laser light of Label 1 (light having a wavelength of 950 nm or more and a wavelength of 1400 nm or less) is preferably larger than 0.22, more preferably 0.24 or more, and more preferably 0.40 or more. Especially preferable. When the absorbance of the laser beam of the label 1 is larger than 0.22, more preferably 0.24 or more, and particularly preferably 0.40 or more, the color-developing layer 15 from the base material 11 side. The color development display can be shielded, and the color development layer 15 can be heated to a temperature suitable for expressing the color development display in the color development layer 15 by heating by irradiation with a laser beam.
　ラベル１のレーザ光（波長９５０ｎｍ以上波長１４００ｎｍ以下）の吸光度は、０．９２未満であることが好ましく、０．６以下であることがより好ましく、０．５５以下であることが特に好ましい。これらの場合には、基材１１側からの発色層１５における発色表示を遮蔽可能であるとともに、レーザ光の照射による加熱によって第１中間層１３の温度が高くなりすぎてラベル１が溶融する可能性を低減することができる。 The absorbance of the laser beam of Label 1 (wavelength 950 nm or more and wavelength 1400 nm or less) is preferably less than 0.92, more preferably 0.6 or less, and particularly preferably 0.55 or less. In these cases, it is possible to shield the color development display on the color development layer 15 from the base material 11 side, and the temperature of the first intermediate layer 13 becomes too high due to heating by irradiation with a laser beam, so that the label 1 can be melted. The sex can be reduced.
　第１中間層１３は、発色層１５側から照射されたレーザ光の反射機能を備えていてもよい。この場合には、発色層１５側から照射され、発色層１５および第２中間層１４を透過したレーザ光を第１中間層１３で反射させて発色層１５に戻すことができる。これにより発色層１５がレーザ光の反射光を吸収して発色層１５を再度発熱させることができるため発色表示をさらに明確に発現させることが可能になる。 The first intermediate layer 13 may have a function of reflecting laser light emitted from the color developing layer 15 side. In this case, the laser light emitted from the color-developing layer 15 side and transmitted through the color-developing layer 15 and the second intermediate layer 14 can be reflected by the first intermediate layer 13 and returned to the color-developing layer 15. As a result, the color-developing layer 15 can absorb the reflected light of the laser beam to generate heat again, so that the color-developing display can be expressed more clearly.
　＜第２中間層＞
　第２中間層１４は、発色層１５における発色表示の視認性を高めることが可能な層である。本実施形態において、「発色層側からの発色層における発色表示の視認性を高めることが可能」とは、ラベルに第２中間層が設けられている場合とラベルに第２中間層が設けられていない場合とを比較して、ラベルに第２中間層が設けられている場合の方が、ラベルの発色層側からの目視により、発色層に形成された発色表示をより明確に認識できる性質を有していることを意味する。 <Second middle layer>
The second intermediate layer 14 is a layer capable of enhancing the visibility of the color development display in the color development layer 15. In the present embodiment, "it is possible to improve the visibility of the color development display in the color development layer from the color development layer side" means that the label is provided with the second intermediate layer and the label is provided with the second intermediate layer. When the label is provided with the second intermediate layer, the color display formed on the color-developing layer can be more clearly recognized visually from the color-developing layer side of the label, as compared with the case where the label is not provided. Means to have.
　第２中間層１４としては、たとえば、着色顔料を含むインキ塗膜を用いることができる。第２中間層１４を構成するインキ塗膜の着色顔料としては、たとえば、薄黄色、薄紅色等の淡色または白色等を用いることができる。第２中間層１４を構成するインキ塗膜に含まれる着色顔料以外の成分としては、たとえば、バインダ樹脂等が挙げることができる。 As the second intermediate layer 14, for example, an ink coating film containing a coloring pigment can be used. As the coloring pigment of the ink coating film constituting the second intermediate layer 14, for example, a light color such as light yellow or light red or white or the like can be used. Examples of the components other than the coloring pigment contained in the ink coating film constituting the second intermediate layer 14 include a binder resin and the like.
　なかでも、第２中間層１４としては、発色層１５側からの発色層１５における発色表示の視認性を高めることが可能な着色顔料を含むインキ塗膜を用いることが好ましい。このような第２中間層１４としては、たとえば白ベタインキ層を用いることができる。特に、発色層１５にＱＲコード（登録商標）やバーコードを表示させる場合には、第２中間層１４は白ベタインキ層であることが好ましい。 Among them, as the second intermediate layer 14, it is preferable to use an ink coating film containing a coloring pigment capable of enhancing the visibility of the color development display on the color development layer 15 from the color development layer 15 side. As such a second intermediate layer 14, for example, a white solid ink layer can be used. In particular, when displaying a QR code (registered trademark) or a barcode on the color-developing layer 15, it is preferable that the second intermediate layer 14 is a white solid ink layer.
　＜発色層＞
　発色層１５は、レーザ光の照射により発色表示を発現可能な層である。本実施形態において、「レーザ光の照射により発色表示を発現可能」とは、実際に発色層１５にレーザ光が照射されていなくても、実際に発色層１５にレーザ光が照射されたと仮定した場合に、レーザ光が照射された箇所が発色（変色）する箇所を生じさせることが可能な性質を有することを意味する。 <Color layer>
The color-developing layer 15 is a layer capable of exhibiting a color-developing display by irradiation with a laser beam. In the present embodiment, "the color display can be expressed by irradiating the laser light" is assumed that the color-developing layer 15 is actually irradiated with the laser light even if the color-developing layer 15 is not actually irradiated with the laser light. In some cases, it means that the portion irradiated with the laser beam has a property of being able to generate a color (discoloration).
　発色層１５としては、レーザ光の照射により発色表示を発現可能な発色塗膜を特に限定なく用いることができる。発色層１５を構成する発色塗膜としては、レーザ光の照射により変色を可能とするロイコ染料を含む発色塗膜を用いることができる。発色層１５は、たとえば、レーザ光の照射前は透明であって、レーザ光の照射箇所が加熱されて黒色化し、当該黒色化した箇所が発色表示となる層を用いることができる。 As the color-developing layer 15, a color-developing coating film capable of exhibiting color development by irradiation with laser light can be used without particular limitation. As the color-developing coating film constituting the color-developing layer 15, a color-developing coating film containing a leuco dye that enables color change by irradiation with a laser beam can be used. As the color-developing layer 15, for example, a layer that is transparent before irradiation with a laser beam, the portion irradiated with the laser beam is heated to become black, and the blackened portion becomes a color-developing display can be used.
　＜デザイン層＞
　デザイン層１２は、基材１１側から視認可能なデザインを備える層である。デザイン層１２は、たとえば図１に示すように、ラベル１の基材１１と第１中間層１３との間に位置させることが可能であるが、これに限定されるものではない。また、ラベル１は、デザイン層１２を備えていなくてもよい。 <Design layer>
The design layer 12 is a layer having a design that can be visually recognized from the base material 11 side. The design layer 12 can be located between the base material 11 of the label 1 and the first intermediate layer 13, as shown in FIG. 1, for example, but is not limited thereto. Further, the label 1 does not have to include the design layer 12.
　デザイン層１２は、レーザ光の照射による発熱を抑制可能な層とすることができる。デザイン層１２がレーザ光の照射による発熱を抑制可能な層である場合には、デザイン層１２がレーザ光を吸収して発熱することによるラベル１の溶融の可能性を低減することができる。 The design layer 12 can be a layer capable of suppressing heat generation due to irradiation with laser light. When the design layer 12 is a layer capable of suppressing heat generation due to irradiation with laser light, the possibility of melting of the label 1 due to the design layer 12 absorbing the laser light and generating heat can be reduced.
　デザイン層１２をレーザ光の照射による発熱を抑制可能な層とするためには、デザイン層１２がレーザ光の吸収を抑制可能な顔料を含むことが好ましい。たとえば、デザイン層１２において黒を表現するためにデザイン層１２を構成する顔料にカーボンブラックを用いた場合には、レーザ光の照射によりデザイン層１２が発熱しすぎることがあるため、カーボンブラックの代わりにレーザ光の波長領域の吸収が少ない顔料（たとえば、黄色、藍色、および紅色等）を混合して黒を調色することが好ましい。 In order to make the design layer 12 a layer capable of suppressing heat generation due to irradiation of laser light, it is preferable that the design layer 12 contains a pigment capable of suppressing absorption of laser light. For example, when carbon black is used as the pigment constituting the design layer 12 in order to express black in the design layer 12, the design layer 12 may generate too much heat due to irradiation with laser light, so that the design layer 12 may be replaced with carbon black. It is preferable to mix black with a pigment (for example, yellow, indigo, red, etc.) that absorbs less in the wavelength range of the laser light.
　＜その他の層＞
　ラベル１は、その他の層をさらに備えていてもよい。その他の層の位置および材質等は特に限定されないが、たとえば、カラーインキ層、または、基材１１の外側（第１中間層１３が位置する側とは反対側）または発色層１５の内側（第２中間層１４が位置する側とは反対側）に外的要因からラベル１を保護するためのメジウム等の保護層を挙げることができる。 <Other layers>
Label 1 may further include other layers. The positions and materials of the other layers are not particularly limited, but for example, the color ink layer, the outside of the base material 11 (the side opposite to the side where the first intermediate layer 13 is located), or the inside of the coloring layer 15 (the first). 2 On the side opposite to the side on which the intermediate layer 14 is located), a protective layer such as medium for protecting the label 1 from external factors can be mentioned.
　＜ラベルの製造方法＞
　実施形態のラベル１は、たとえば以下のようにして製造することができる。まず、基材１１を準備する工程を行う。基材１１を準備する工程は、たとえば、押出法またはカレンダー法等の方法によってプラスチックフィルムを成形することにより、必要に応じて、当該プラスチックフィルムに対してさらに延伸処理を施すことにより準備することにより行うことができる。 <Label manufacturing method>
Label 1 of the embodiment can be manufactured, for example, as follows. First, a step of preparing the base material 11 is performed. The step of preparing the base material 11 is, for example, by molding a plastic film by a method such as an extrusion method or a calender method, and if necessary, further applying a stretching treatment to the plastic film. It can be carried out.
　次に、基材１１の表面上に第１中間層１３を形成する工程を行う。第１中間層１３を形成する工程は、たとえば、第１中間層１３を構成するインキ塗膜の前駆体となる第１中間層用インキ樹脂組成物を基材１１の表面上に塗布した後に乾燥させることにより行うことができる。 Next, a step of forming the first intermediate layer 13 on the surface of the base material 11 is performed. In the step of forming the first intermediate layer 13, for example, the ink resin composition for the first intermediate layer, which is a precursor of the ink coating film constituting the first intermediate layer 13, is applied onto the surface of the base material 11 and then dried. It can be done by letting it.
　なお、ラベル１が、基材１１と第１中間層１３との間にデザイン層１２を備える場合には、基材１１の表面上にデザイン層１２を形成する工程を行う。デザイン層１２を形成する工程は、たとえば、デザイン層１２の前駆体となるインキ樹脂組成物をグラビア印刷、フレキソ印刷、インクジェット印刷、スクリーン印刷、またはオフセット印刷することにより行うことができる。 When the label 1 includes the design layer 12 between the base material 11 and the first intermediate layer 13, a step of forming the design layer 12 on the surface of the base material 11 is performed. The step of forming the design layer 12 can be performed, for example, by gravure printing, flexographic printing, inkjet printing, screen printing, or offset printing of the ink resin composition that is the precursor of the design layer 12.
　次に、第１中間層１３の表面上に第２中間層１４を形成する工程を行う。第２中間層１４を形成する工程は、たとえば、第２中間層１４を構成するインキ塗膜の前駆体となる第２中間層用インキ樹脂組成物を基材１１の表面上に塗布した後に乾燥させることにより行うことができる。 Next, a step of forming the second intermediate layer 14 on the surface of the first intermediate layer 13 is performed. In the step of forming the second intermediate layer 14, for example, the ink resin composition for the second intermediate layer, which is a precursor of the ink coating film constituting the second intermediate layer 14, is applied onto the surface of the base material 11 and then dried. It can be done by letting it.
　次に、第２中間層１４の表面上に発色層１５を形成する工程を行う。発色層１５を形成する工程は、たとえば、発色層１５を構成する発色塗膜の前駆体となる発色塗膜用樹脂組成物を第２中間層１４の表面上に塗布した後に乾燥させることにより行うことができる。 Next, a step of forming the color-developing layer 15 on the surface of the second intermediate layer 14 is performed. The step of forming the color-developing layer 15 is performed, for example, by applying a resin composition for a color-developing coating film, which is a precursor of the color-developing coating film constituting the color-developing layer 15, onto the surface of the second intermediate layer 14 and then drying the resin composition. be able to.
　以上により、実施形態のラベル１を製造することができる。実施形態のラベル１は、基材１１と発色層１５との間に、基材１１側から発色層１５における発色表示を遮蔽可能な第１中間層１３を備えている。したがって、実施形態のラベル１においては、基材１１側からの発色層１５における発色表示を遮蔽、すなわち視認により確認することができない。 From the above, the label 1 of the embodiment can be manufactured. The label 1 of the embodiment includes a first intermediate layer 13 capable of shielding the color development display in the color development layer 15 from the base material 11 side between the base material 11 and the color development layer 15. Therefore, in the label 1 of the embodiment, the color development display on the color development layer 15 from the base material 11 side cannot be shielded, that is, visually confirmed.
　また、実施形態のラベル１は、第１中間層１３と発色層１５との間に、発色層１５側からの発色層１５における発色表示の視認性を高めることが可能な第２中間層１４を備えている。したがって、実施形態のラベル１においては、発色層１５側からの発色層１５における発色表示を視認により明確に確認することができる。 Further, the label 1 of the embodiment has a second intermediate layer 14 between the first intermediate layer 13 and the color-developing layer 15 which can enhance the visibility of the color-developing display in the color-developing layer 15 from the color-developing layer 15 side. I have. Therefore, in the label 1 of the embodiment, the color development display on the color development layer 15 from the color development layer 15 side can be clearly confirmed visually.
　したがって、実施形態のラベル１においては、ラベル１の外側からラベル１の内側のレーザ印字を遮蔽することが可能であるとともに、ラベル１の内側からはレーザ印字を明確に確認することができる。 Therefore, in the label 1 of the embodiment, it is possible to shield the laser printing inside the label 1 from the outside of the label 1, and the laser printing can be clearly confirmed from the inside of the label 1.
　＜実施例１のラベルの作製＞
　まず、厚さ４５μｍの透明なポリスチレンフィルムからなる基材を準備した。次に、基材上の一方の表面上に銀色の着色顔料を含む第１中間層用インキ樹脂組成物を基材の一方の表面上に塗布した後に乾燥させることにより厚さ３～５μｍの銀色の第１中間層を形成した。 <Preparation of Label of Example 1>
First, a substrate made of a transparent polystyrene film having a thickness of 45 μm was prepared. Next, an ink resin composition for a first intermediate layer containing a silver coloring pigment on one surface of the substrate is applied onto one surface of the substrate and then dried to obtain a silver color having a thickness of 3 to 5 μm. The first intermediate layer of the above was formed.
　次に、第１中間層の基材が形成されていない側の表面上に白色の着色顔料を含む第２中間層用インキ樹脂組成物を基材の一方の表面上に塗布した後に乾燥させることにより白ベタインキ層からなる厚さ３～５μｍの白色の第２中間層を形成した。 Next, an ink resin composition for a second intermediate layer containing a white coloring pigment is applied onto one surface of the substrate and then dried on the surface of the side on which the substrate of the first intermediate layer is not formed. A white second intermediate layer having a thickness of 3 to 5 μm composed of a white solid ink layer was formed.
　次に、第２中間層の第１中間層が形成されていない側の表面上に発色層を構成する発色塗膜の前駆体となる発色塗膜用樹脂組成物を塗布した後に乾燥させることにより透明な発色層を形成した。 Next, a resin composition for a color-developing coating film, which is a precursor of the color-developing coating film constituting the color-developing layer, is applied onto the surface of the second intermediate layer on the side where the first intermediate layer is not formed, and then dried. A transparent coloring layer was formed.
　その後、発色層の第２中間層が形成されていない側の表面上に透明なメジウムを塗布することによって、実施例１のラベルを作製した。 After that, the label of Example 1 was prepared by applying a transparent medium on the surface on the side where the second intermediate layer of the coloring layer was not formed.
　＜実施例２のラベルの作製＞
　基材と第１中間層との間に厚さ３～５μｍの藍色のカラーインキ層を形成するとともに第１中間層を銀色にしたこと以外は実施例１と同一の方法および同一の条件で実施例２のラベルを作製した。 <Preparation of Label of Example 2>
Under the same method and conditions as in Example 1 except that an indigo color ink layer having a thickness of 3 to 5 μm was formed between the base material and the first intermediate layer and the first intermediate layer was made silver. The label of Example 2 was prepared.
　＜実施例３のラベルの作製＞
　第１中間層を金色にしたこと以外は実施例１と同一の方法および同一の条件で実施例３のラベルを作製した。 <Preparation of Label of Example 3>
The label of Example 3 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was colored gold.
　＜実施例４のラベルの作製＞
　第１中間層を灰色にしたこと以外は実施例１と同一の方法および同一の条件で実施例４のラベルを作製した。 <Preparation of Label of Example 4>
The label of Example 4 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was grayed out.
　＜比較例１のラベルの作製＞
　第１中間層を藍色にしたこと以外は実施例１と同一の方法および同一の条件で比較例１のラベルを作製した。 <Making the label of Comparative Example 1>
The label of Comparative Example 1 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was indigo.
　＜比較例２のラベルの作製＞
　第１中間層を紅色にしたこと以外は実施例１と同一の方法および同一の条件で比較例２のラベルを作製した。 <Preparation of label of Comparative Example 2>
The label of Comparative Example 2 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was colored red.
　＜比較例３のラベルの作製＞
　第１中間層を黄色にしたこと以外は実施例１と同一の方法および同一の条件で比較例３のラベルを作製した。 <Preparation of label of Comparative Example 3>
The label of Comparative Example 3 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was yellow.
　＜比較例４のラベルの作製＞
　第１中間層を黒色にしたこと以外は実施例１と同一の方法および同一の条件で比較例４のラベルを作製した。なお、黒色の第１中間層の材料としては、カーボンブラックを用いた黒色インキを用いた。 <Preparation of label of Comparative Example 4>
The label of Comparative Example 4 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was made black. As the material of the black first intermediate layer, black ink using carbon black was used.
　＜比較例５のラベルの作製＞
　第１中間層を形成しなかったこと以外は実施例１と同一の方法および同一の条件で比較例５のラベルを作製した。 <Preparation of label of Comparative Example 5>
The label of Comparative Example 5 was prepared by the same method and under the same conditions as in Example 1 except that the first intermediate layer was not formed.
　＜吸光度の測定＞
　白色の台上に基材が上側（露出される側）になるように実施例１～４および比較例１～５のラベルを設置した。そして、基材側から波長９５０ｎｍの近赤外線をラベルに対して角度を設けて照射し、実施例１～４および比較例１～５の各ラベルの反射光の強度から、実施例１～４および比較例１～５の各ラベルの吸光度を算出した。その結果を表１、表２および図２に示す。表１および表２の「吸光度」の欄の数値が、実施例１～４および比較例１～５のラベルの吸光度を示している。 <Measurement of absorbance>
Labels of Examples 1 to 4 and Comparative Examples 1 to 5 were placed on a white table so that the base material was on the upper side (exposed side). Then, near infrared rays having a wavelength of 950 nm are irradiated from the base material side at an angle to the labels, and from the intensity of the reflected light of each label of Examples 1 to 4 and Comparative Examples 1 to 5, Examples 1 to 4 and The absorbance of each label of Comparative Examples 1 to 5 was calculated. The results are shown in Table 1, Table 2 and FIG. The numerical values in the column of "absorbance" in Tables 1 and 2 indicate the absorbances of the labels of Examples 1 to 4 and Comparative Examples 1 to 5.
　＜インキの再溶解＞
　上記の近赤外線の照射後の実施例１～４および比較例１～５のラベルの外観を目視により評価した。その結果を表１および表２に示す。表１および表２の「インキの再溶解」の欄の「有」がラベルを構成する層のインキ抜けが確認されたことを示し、「無」がラベルを構成する層のインキ抜けが確認されなかったことを示している。 <Redissolution of ink>
The appearance of the labels of Examples 1 to 4 and Comparative Examples 1 to 5 after irradiation with the above near infrared rays was visually evaluated. The results are shown in Tables 1 and 2. "Yes" in the "Ink redissolution" column of Tables 1 and 2 indicates that ink loss was confirmed in the layers constituting the label, and "No" indicates ink leakage in the layers constituting the label. It shows that it was not.
　＜印字の視認性＞
　実施例１～４および比較例１～５のラベルの発色層側から波長９５０ｎｍの近赤外線をそれぞれのラベルの発色層に照射してレーザ印字を形成した後、ラベルの発色層側からのレーザ印字の視認性を目視により以下のＡ～Ｃの基準で評価した。その結果を表１および表２に示す。表１および表２の「レーザ印字の視認性」の欄の「Ａ」がレーザ印字（黒色）を第２中間層とのコントラスト（白色）によって十分に明確に視認できたことを示し、「Ｂ」がレーザ印字を第２中間層とのコントラストによって視認できたことを示し、「Ｃ」がレーザ印字を第２中間層とのコントラストでも十分に視認できなかったことを示している。 <Print visibility>
Laser printing is formed by irradiating the coloring layer of each label with near infrared rays having a wavelength of 950 nm from the coloring layer side of the labels of Examples 1 to 4 and Comparative Examples 1 to 5, and then laser printing from the coloring layer side of the label. The visibility of the above was visually evaluated according to the following criteria A to C. The results are shown in Tables 1 and 2. "A" in the "Laser printing visibility" column of Tables 1 and 2 indicates that the laser printing (black) could be clearly seen sufficiently by the contrast (white) with the second intermediate layer, and "B". "" Indicates that the laser printing could be visually recognized by the contrast with the second intermediate layer, and "C" indicates that the laser printing could not be sufficiently visually recognized even with the contrast with the second intermediate layer.
　＜遮蔽性＞
　実施例１～４および比較例１～５のラベルの発色層側から波長９５０ｎｍの近赤外線をそれぞれのラベルの発色層に照射してレーザ印字を形成した後、ラベルの基材側からのレーザ印字の遮蔽性を目視により以下のＡ～Ｃの基準で評価した。その結果を表１および表２に示す。表１および表２の「遮蔽性」の欄の「Ａ」がレーザ印字を第１中間層により完全に遮蔽できていたことを示し、「Ｂ」がレーザ印字を第１中間層によりほぼ遮蔽できていたことを示し、「Ｃ」がレーザ印字を第１中間層により十分に遮蔽できていなかったことを示している。 <Shielding>
Laser printing is formed by irradiating the color-developing layers of the labels with near-infrared rays having a wavelength of 950 nm from the color-developing layer side of the labels of Examples 1 to 4 and Comparative Examples 1 to 5, and then laser printing from the substrate side of the label. The shielding property was visually evaluated according to the following criteria A to C. The results are shown in Tables 1 and 2. "A" in the "shielding property" column of Tables 1 and 2 indicates that the laser printing could be completely shielded by the first intermediate layer, and "B" could almost shield the laser printing by the first intermediate layer. "C" indicates that the laser printing could not be sufficiently shielded by the first intermediate layer.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
　＜評価＞
　表１および表２に示すように、実施例１～４のラベルは、比較例１～５のラベルと比べて、第１中間層によるレーザ印字の遮蔽性および第２中間層によるレーザ印字の視認性がともに優れていることが確認された。 <Evaluation>
As shown in Tables 1 and 2, the labels of Examples 1 to 4 have a shielding property of laser printing by the first intermediate layer and a visual recognition of laser printing by the second intermediate layer as compared with the labels of Comparative Examples 1 to 5. It was confirmed that both sexes were excellent.
　また、吸光度が０．２２よりも大きく０．５５以下、特に０．２４以上０．５５以下である実施例１～４のラベルは、吸光度が０．２２以下である比較例１～５のラベルと比べて、第１中間層によるレーザ印字の遮蔽性および第２中間層によるレーザ印字の視認性をともに向上することができることも確認された。 Further, the labels of Examples 1 to 4 having an absorbance greater than 0.22 and 0.55 or less, particularly 0.24 or more and 0.55 or less, are labels of Comparative Examples 1 to 5 having an absorbance of 0.22 or less. It was also confirmed that both the shielding property of the laser printing by the first intermediate layer and the visibility of the laser printing by the second intermediate layer can be improved as compared with the above.
　また、吸光度が０．４０以上０．５５以下である実施例１、２および４のラベルは、吸光度が０．２４である実施例３のラベルと比べて、第１中間層によるレーザ印字の遮蔽性および第２中間層によるレーザ印字の視認性をともに向上することができることも確認された。 Further, the labels of Examples 1, 2 and 4 having an absorbance of 0.40 or more and 0.55 or less have a shielding of laser printing by the first intermediate layer as compared with the label of Example 3 having an absorbance of 0.24. It was also confirmed that both the sex and the visibility of the laser printing by the second intermediate layer can be improved.
　以上のように実施形態および実施例について説明を行なったが、上述の各実施形態および各実施例の構成を適宜組み合わせることも当初から予定している。 Although the embodiments and examples have been described as described above, it is planned from the beginning that the configurations of the above-mentioned embodiments and the embodiments are appropriately combined.
　今回開示された実施形態および実施例はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 It should be considered that the embodiments and examples disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope of the claims.
　１　ラベル、１１　基材、１２　デザイン層、１３　第１中間層、１４　第２中間層、１５　発色層。  1 label, 11 base material, 12 design layer, 13 first intermediate layer, 14 second intermediate layer, 15 coloring layer. The

Claims (4)

  1. 　基材と、
    　前記基材上の第１中間層と、
    　前記第１中間層上の第２中間層と、
    　前記第２中間層上の発色層と、を備え、
    　前記発色層は、レーザ光の照射により発色表示を発現可能であり、
    　前記第１中間層は、前記基材側からの前記発色層における前記発色表示を遮蔽可能であり、
    　前記第２中間層は、前記発色層側からの前記発色層における前記発色表示の視認性を高めることが可能である、ラベル。     With the base material
    The first intermediate layer on the substrate and
    The second intermediate layer on the first intermediate layer and
    The color-developing layer on the second intermediate layer is provided.
    The color-developing layer can exhibit a color-developing display by irradiation with a laser beam.
    The first intermediate layer can shield the color development display in the color development layer from the base material side.
    The second intermediate layer is a label capable of enhancing the visibility of the color development display in the color development layer from the color development layer side.
  2. 　前記ラベルの前記レーザ光の吸光度は、０．２２よりも大きく、０．９２未満である、請求項１に記載のラベル。 The label according to claim 1, wherein the absorbance of the laser beam of the label is greater than 0.22 and less than 0.92.
  3. 　前記基材と前記第１中間層との間に、前記基材側から視認可能なデザイン層をさらに備える、請求項１または請求項２に記載のラベル。 The label according to claim 1 or 2, further comprising a design layer visible from the substrate side between the substrate and the first intermediate layer.
  4. 　基材上に第１中間層を形成する工程と、
    　前記第１中間層上に第２中間層を形成する工程と、
    　前記第２中間層上に発色層を形成する工程と、
    　前記発色層にレーザ光を照射することによって発色表示を発現させる工程と、を含み、　前記第１中間層は、前記基材側からの前記発色層における前記発色表示を遮蔽可能であり、
    　前記第２中間層は、前記発色層側からの前記発色層における前記発色表示の視認性を高めることが可能である、ラベルの製造方法。
          The process of forming the first intermediate layer on the substrate and
    The step of forming the second intermediate layer on the first intermediate layer and
    The step of forming a color-developing layer on the second intermediate layer and
    The first intermediate layer can shield the color development display in the color development layer from the base material side, including a step of expressing the color development display by irradiating the color development layer with a laser beam.
    The second intermediate layer is a method for manufacturing a label, which can enhance the visibility of the color development display in the color development layer from the color development layer side.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001228801A (en) * 1999-12-10 2001-08-24 Fuji Seal Inc Cylindrical label, long-sized cylindrical body and method for manufacturing the same, and container with cylindrical label
JP2009507670A (en) * 2005-08-29 2009-02-26 シンクレア システムズ インターナショナル エルエルシー Multi-layer medium capable of optical printing and method and apparatus for using the same
JP2009120205A (en) * 2007-11-12 2009-06-04 Toppan Printing Co Ltd Packaging bag with opacifying layer and packaging material used for the packaging bag
US20110121557A1 (en) * 2008-05-15 2011-05-26 Pingfan Wu Multilayer articles capable of forming color images

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001228801A (en) * 1999-12-10 2001-08-24 Fuji Seal Inc Cylindrical label, long-sized cylindrical body and method for manufacturing the same, and container with cylindrical label
JP2009507670A (en) * 2005-08-29 2009-02-26 シンクレア システムズ インターナショナル エルエルシー Multi-layer medium capable of optical printing and method and apparatus for using the same
JP2009120205A (en) * 2007-11-12 2009-06-04 Toppan Printing Co Ltd Packaging bag with opacifying layer and packaging material used for the packaging bag
US20110121557A1 (en) * 2008-05-15 2011-05-26 Pingfan Wu Multilayer articles capable of forming color images

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