JP2005352005A - Embossing label and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an embossing label having the appearance of an embossing tone and highly luxurious feeling without the impairment of the three-dimensional feel of embossing seams in spite of using a water-base glue when sticking the embossing label to a bottle of a beer drink and the like. <P>SOLUTION: The embossing label comprising extruding a molten resin by an extrusion lamination method to at least one surface of a base material layer (1) mainly composed of a paper layer, providing the base material layer with an embossing resin layer (2) by a cleaning roll having an embossing partition, providing the surface of the resin layer (2) with an aluminum evaporation thin-film layer (3), and further sequentially providing the base material layer with an anchor layer (4) and a printing ink layer (5) and its manufacturing method are provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an embossed label and a method for producing the same, and more specifically, when pasting an embossed label on a bottle such as a beer beverage, even if it is pasted using an aqueous paste, the embossed three-dimensional effect is not impaired, The present invention relates to a high-quality embossed label having an embossed appearance and a manufacturing method thereof.

  Conventionally, printed labels for beer beverages, etc., have used aluminum vapor-deposited paper in which aluminum is vapor-deposited on the paper. However, embossed and embossed appearance is rich in luxury. Labels are common, especially overseas.

  Also in Japan, an embossed label has been proposed in which a printing surface is formed on a label sheet laminated with an aluminum thin film and embossed (see, for example, Patent Document 1).

Prior art documents are shown below.
Japanese Utility Model Publication No. 2-24869

  As for the embossed label mentioned above, it is common to stick this label to a beer bottle etc. using the water-based glue with a washing ability.

  However, when the embossed label is to be attached to the bottle with aqueous glue, the paper layer constituting the label absorbs the moisture of the glue, and the fibers of the paper are stretched, so that the fine embossed eyes disappear. A problem occurs.

  The present invention is intended to solve such problems of the prior art, and when embossing labels are attached to bottles such as beer beverages, even if an aqueous paste is used, the three-dimensional effect of embossing eyes is not impaired, An object of the present invention is to provide a high-quality embossed label having an embossed appearance and a manufacturing method thereof.

  The present invention has been made to solve the above problems, and the invention according to claim 1 of the present invention provides an embossed resin layer on at least one surface of a base material layer (1) mainly composed of a paper layer. (2) An embossed label in which an aluminum vapor-deposited thin film layer (3), an anchor layer (4), and a printing ink layer (5) are sequentially laminated.

  In the invention according to claim 2 of the present invention, the resin layer (2) is formed by extruding a molten resin and extruding a pattern provided on a cooling roll by an extrusion lamination method onto a base material layer (1) mainly composed of a paper layer. The resin layer (2) provided with the embossed pattern is provided with an aluminum vapor-deposited thin film layer (3), and an anchor layer (4) and a printing ink layer (5) are sequentially provided. It is a manufacturing method of the embossed label to do.

The embossed label of the present invention is formed by sequentially laminating an embossed resin layer, an aluminum vapor-deposited thin film layer, an anchor layer, and a printing ink layer on at least one side of a base material layer mainly composed of a paper layer.
Even if it uses and pastes water paste on bottles, such as a beer drink, since the embossed three-dimensional impression is not spoiled, the appearance which is rich in embossed quality can be maintained.

  An embodiment of the present invention will be described in detail with reference to FIG.

  FIG. 1 is a side sectional view showing an embodiment of a layer structure of an embossed label according to the present invention.

  As shown in FIG. 1, an embossed label according to the present invention has an embossed resin layer (2), an aluminum vapor-deposited thin film layer (3), an anchor layer (1) on at least one surface of a base material layer (1) mainly composed of a paper layer. 4) The printing ink layer (5) is sequentially laminated.

The material used for the base material layer (1) is not particularly limited, but it is preferable to use non-coated paper such as pure white roll paper having a basis weight of 30 to 100 g / m ² in consideration of processability and cost. Although it is preferable, a coating layer may be provided on the surface.

  As the other substrate layer (1), a single film such as a polyethylene terephthalate film (PET) or a polypropylene film (PP) can also be used.

  Next, the embossed resin layer (2) provided on the base material layer (1) will be described in detail below.

  The embossed resin layer (2) uses a thermoplastic resin, such as a polyolefin resin such as polyethylene (PE) or polypropylene (PP), or an acrylic resin having alkali swellability in order to impart bottle washing properties. be able to.

  Examples of acrylic resins include acrylic acid resins, ethylene-acrylic acid copolymer resins, acrylic acid ester resins, acrylic acid ester-acrylic acid copolymer resins, etc., which are alkali-soluble, suitable for extrusion processing, and cooling. It must be possible to emboss between the roll and the nip roll.

  The acrylic resin preferably has a high MFR from the viewpoint of embossability, and is particularly preferably in the range of 10 to 25 dg / min.

  Furthermore, in terms of alkali solubility, when the acid value is less than 100 to 400 mgKOH / g, the solubility in alkali is slow, and there is a possibility that sufficient alkali washing bottle suitability may not be obtained, and it exceeds 400 mgKOH / g. Extrusion suitability deteriorates due to decomposition during melt extrusion.

  The method of providing the embossed resin layer (2) on the base material layer (1) can be laminated by an extrusion lamination method because the resin to be used is a thermoplastic resin.

  That is, polyethylene, polypropylene, or acrylic thermoplastic resin is heated, melted in a cylinder called a cylinder, extruded with a screw, and extruded from a thin slit called a T die at the tip of the cylinder. By extruding the resin dissolved in the form of a film, laminating it on the base material layer (1), and cooling and solidifying it with a cooling roll, by using a fine embossed one on the cooling roll An embossed resin layer (2) having an embossed pattern can be provided on the surface of the resin layer.

  The shape of the fine emboss to be processed into the cooling roll is not particularly limited, but a mesh mat-like shape, a silk-like shape such as a square or a rectangle, or a long and slender winding-like textured shape should be used. Can do.

  The emboss diameter and depth are preferably in the range of several tens of μm to several hundreds of μm. The material of the cooling roll is not particularly limited as long as the emboss in this range can be formed, but a metal is preferable in consideration of the cooling effect.

  Next, an aluminum vapor-deposited thin film layer (3) is provided on the embossed resin layer (2). In consideration of adhesiveness with the aluminum vapor-deposited thin film layer (3), the surface of the embossed resin layer (2) is moved forward. It is preferable to process.

  For example, as a pretreatment method, the pretreatment can be performed by a known method such as corona discharge treatment, glow discharge treatment, low temperature plasma treatment, flame treatment, chemical treatment, solvent treatment and the like.

  Next, as a method for forming the aluminum vapor-deposited thin film layer (3), a vacuum vapor deposition method, a sputtering method, or the like can be used. However, in consideration of productivity, the vacuum vapor deposition method is preferable.

  There are three types of vacuum deposition methods, depending on the form of the body to be vapor-deposited. 1) Batch method: vapor deposition method of molded products, 2) take-up semi-continuous method: vacuum for roll-shaped film (web) After unwinding / deposition / winding in the system, return to the atmospheric system again and take out the evaporated product. 3) Unwinder (unwinding device) for roll-type film (web) ) And a rewinder (winding device) are arranged in the atmospheric system, and a vapor deposition drum and an evaporation source are arranged in a vacuum system to vaporize the evaporated substance on a roll film (web). There is a complete continuous method, also called a to-air method, which is characterized by high productivity.

  When evaporating a vaporized material on a roll-shaped film (web), a take-up semi-continuous method is particularly widespread. Describes the internal structure.

  First, the constituent elements are a roll film (web), an evaporation source, an evaporation substance, a vapor deposition drum, a vacuum system, an unwinder (unwinding device), a rewinder (winding device), a guide roll, and the like.

  Next, the outline of the work process will be described. First, as a preparatory step, the door of the vacuum evaporation apparatus is opened, a roll-shaped film (web) is set in the unwinder (unwinding apparatus), and it is arranged between the unwinder and the evaporation drum. The web is caused to travel to the vapor deposition drum through a guide roll that is wound around the rewinder (winding device) via a guide roll disposed between the web and the rewinder (winding device). Preparation of vapor deposition of the evaporating substance on is completed.

  Next, the door of the vacuum deposition apparatus is closed, and the vacuum suction chamber in the vacuum deposition apparatus and the vacuum deposition chamber divided by the partition walls are set to a predetermined vacuum environment by a vacuum pump, and the web is unwound from the unwinder. The evaporating substance is evaporated on the web by evaporating the evaporating substance from the evaporation source disposed at the lower part of the evaporating drum on the web that has been run through the guide roll.

  Since the vapor deposition drum is cooled, the vaporized substance is recrystallized and fixed on the web, and the vapor deposited on the rewinder side guide roll is wound around the rewinder.

  The internal structure of the vacuum deposition apparatus is divided into a vacuum suction constant pressure chamber and a vacuum deposition chamber by partition walls. The vacuum suction constant pressure chamber is composed of an unwinder, guide roll, tension control device, speed control device, position control device, and vapor deposition drum. Some rewinders are arranged.

In the vacuum deposition chamber, a part of the deposition drum, the evaporation source, its heating device, and the like are arranged, and the vacuum suction constant pressure chamber has a degree of vacuum of 1 by a vacuum pump attached to the periphery of the vacuum deposition apparatus main body. × 10 ⁰ MPa about, the vacuum deposition chamber provided via the partition wall is set to a degree 1 × 10 ^-2 MPa (SI units).

  Since the two chambers are divided by the partition walls, impurities (dust) such as gas generated from the web in the vacuum suction constant pressure chamber are unlikely to adversely affect the deposition in the vacuum deposition chamber.

  On the contrary, the radiant heat from the evaporation source arranged in the vacuum deposition chamber has little influence on the vacuum suction constant pressure chamber, so that the influence of the heat on the web is small.

  The vacuum deposition method is also a heating method: 1) Indirect resistance method, 2) Direct resistance heating method (wire feed method), 3) High frequency induction heating method, 4) Electron beam method (Electoron Beam, EB method for short) 4 There are two methods, but among them, the electron beam method with high energy conversion efficiency is often used.

  The wound-up electron beam vacuum deposition method is a method in which the evaporative material is directly irradiated with an electron beam and scanned on the surface of the evaporative material, and the surface of the evaporative material is heated. In this method, the evaporated substance is evaporated.

  Next, the thickness of the vapor-deposited thin film layer (3) is preferably within the range of 10 to 100 nm in consideration of the thin film strength, workability, and synchrony with the embossed eyes of the embossed resin layer (2). More preferably within the range of 70 nm.

  As described above, the aluminum vapor-deposited thin film layer (3) is provided on the embossed resin layer (2). Since the aluminum vapor-deposited thin film layer (3) is very thin, the embossed shape of the embossed resin layer (2) is provided. In synchronism with this, it becomes possible to form the same embossed shape as that of the resin layer (2) in the deposited thin film layer (3).

  Next, the printing ink layer (5) is provided on the aluminum vapor-deposited thin film layer (3) having the embossed shape as described above via the anchor layer (4).

  The anchor layer (4) is coated to enhance the adhesion between the aluminum vapor-deposited thin film layer (3) and the printing ink layer (5).

  Examples of the anchor coating agent used in the anchor layer (4) include an anchor coating agent such as isocyanate (urethane), polyethyleneimine, polybutadiene, and organic titanium, or polyurethane, polyacryl, and polyester. Epoxy-based, polyvinyl acetate-based, cellulose-based, and other lamination adhesives can be used.

  As a method of coating the anchor coating agent, a known gravure roll coating method, reverse roll coating method, bar coating method, dropping method, or the like can be used.

The application amount of the anchor coating agent is preferably about 0.1 to 5 g / m ² (dry state), and the anchor layer (4) fills the emboss of the aluminum vapor deposition layer (3), but is transparent. The bottom emboss can be seen through.

  Moreover, since the printing ink layer (5) is provided on the smooth surface of the anchor layer (4), no particular problem occurs.

  Next, as the printing ink for forming the printing ink layer (5), a color material composed of a pigment or a dye that gives color to the ink, and the printed material while dispersing and holding the color material in fine particles A vehicle composed of a resin to be fixed to a resin and a solvent capable of stably dissolving the resin, maintaining dispersibility of the pigment and dye, fluidity of the ink, and transferring an appropriate amount of ink from a printing plate Further, the colorant is formed from an auxiliary agent such as a surfactant for the purpose of improving dispersibility, coloring property, preventing precipitation, and improving fluidity of the colorant. In particular, the colorant is preferably a pigment having good weather resistance.

  As a printing method for providing the printing layer, for example, a known printing method such as a gravure printing method, a silk screen printing method, a flexographic printing method, and an offset printing method can be used, but copper plating is performed on the surface of an iron cylinder (cylinder). Forming a base, providing a release layer on the copper-plated surface, further copper-plating, and creating a recess (cell) by engraving or corrosion method on the polished copper surface of the surface, A gravure printing method in which the printing ink in the cell is transferred to the base material layer (1), can be printed in a colorful manner, and has a high appealing effect is preferable.

  In the following, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples and is applied to a wider range.

<Example 1>
In the embossed label according to the present invention, as shown in FIG. 1, a roll-shaped pure white roll paper having a basis weight of 40 g / m ² was used for the base material layer (1).

  An embossed resin layer (2) having an embossed pattern on the surface of the resin layer is obtained by extruding low density polyethylene (LDPE) onto the base material layer (1), laminating by a lamination method, cooling and solidifying with a mesh mat cooling roll. Provided.

  Next, after corona discharge treatment is performed on the embossed resin layer (2) to activate the surface of the resin layer (2), an aluminum deposited thin film layer having a thickness of 30 nm is formed by an electron beam heating type vacuum deposition apparatus. (3) was provided.

Next, the anchor layer (4) was provided by applying ² g / m ² (dry state) of an isocyanate-based anchor coating agent on the aluminum vapor-deposited thin film layer (3) by a gravure roll coating method.

  Next, the printing ink layer (5) which consists of a character, a beautiful picture, etc. was provided by the gravure printing system using the gravure cylinder plate made in advance with the plate depth of 35 micrometers on this anchor layer (4).

  Thus, the roll-shaped embossing label raw fabric produced was peeked into a known beer label size to obtain embossed labels finished one by one.

When the base layer (1) of this embossed label is not coated with the printing ink layer (5), the non-printing ink layer is coated with aqueous glue and pasted on a beer bottle. The paper layer absorbs moisture from the glue. Even when the paper fibers are stretched, the embossed resin layer (2) is hydrophobic and does not absorb moisture.

  Therefore, since there is no change in the embossed shape formed in the embossed resin layer (2), no change occurs in the aluminum vapor deposited thin film layer (3) synchronized with the embossed resin layer (2). There was no problem that the fine embossed eyes disappeared.

  The present invention provides a high-quality embossed label with an embossed appearance without damaging the embossed three-dimensional appearance even when using an aqueous paste when pasting an embossed label on a bottle such as a beer beverage. Could be manufactured.

<Example 2>
In Example 1, the embossed resin layer (2) was changed to an acrylic resin-based functional resin [trade name: Dicktherm (registered trademark) RP-100, manufactured by Dainippon Ink Industries, Ltd.]. Got.

  When the base layer (1) of this embossed label is not coated with the printing ink layer (5), a non-printing ink layer is coated with aqueous glue and pasted on a beer bottle. The paper layer absorbs moisture from the glue. Even when the paper fibers are stretched, the embossed resin layer (2) is hydrophobic and does not absorb moisture.

  Therefore, since there is no change in the embossed shape formed in the embossed resin layer (2), no change occurs in the aluminum vapor deposited thin film layer (3) synchronized with the embossed resin layer (2). There was no problem that the fine embossed eyes disappeared.

  The present invention provides a high-quality embossed label with an embossed appearance without damaging the embossed three-dimensional appearance even when using an aqueous paste when pasting an embossed label on a bottle such as a beer beverage. Could be manufactured.

It is a sectional side view which shows one Example of the laminated constitution of the embossing label which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material layer 2 ... Embossed resin layer 3 ... Aluminum vapor deposition thin film layer 4 ... Anchor layer 5 ... Printing ink layer

Claims (2)

  An embossed label, wherein an embossed resin layer, an aluminum vapor-deposited thin film layer, an anchor layer, and a printing ink layer are sequentially laminated on at least one surface of a base material layer mainly composed of a paper layer.   Extruded molten resin is extruded onto a base material layer mainly composed of a paper layer, and an embossed pattern provided on a cooling roll is formed on the resin layer, and aluminum is deposited on the surface of the resin layer provided with the embossed pattern. A method for producing an embossed label, wherein a thin film layer is provided, and an anchor layer and a printing ink layer are sequentially provided.

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