JP2019174660A - Manufacturing method of label substrate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a label base material in which a boundary between a resin coat layer and an exposed portion of the base material is hardly noticeable in appearance. SOLUTION: A resin coating agent is printed on a first surface of a base material 2 provided with a resin thick portion 3 by using a plate printing method, including the resin thick portion 3 and a peripheral region thereof. A step of forming an unsolidified thin film 49, a step of laminating the pressing sheet 6 on the first surface of the unsolidified thin film 49 and pressing it, and, after solidifying the thin film, peeling off the pressing sheet 6 The label substrate 1 is manufactured through the steps. [Selection] Fig. 6

Description

  The present invention relates to a method for producing a label substrate having a convex portion and a resin coat layer.

Conventionally, various labels are attached to adherends such as various containers such as beverage containers and food containers. Typical examples of the label include an adhesive label, a cylindrical label, and a wound label.
Such various labels are usually obtained by appropriately processing a long belt-like label base material.
Among such labels and label base materials, those having a thick resin thickened portion are known.
For example, Patent Document 1 discloses a base material, a base representation area provided on the base material, a thick print layer having a thickness of 40 μm to 300 μm printed on a part of the base express area, and a thick print layer. There is disclosed a printed body having a matte coating layer having a thickness of 0.1 μm to 2 μm provided in a region where is not printed.

Japanese Patent No. 6074680

By the way, in Patent Document 1, a resin coat layer (corresponding to a matte coating layer in Patent Document 1) is provided except for a resin thick portion (corresponding to the thick print layer). In some cases, a resin coat layer may be provided. For example, when a resin coat layer is provided as a protective layer, it is preferable to provide a resin coat layer also on the resin thickened portion.
In general, such a resin coat layer is often formed using a plate printing method such as a gravure printing method or a flexographic printing method.

However, when the resin coat layer is formed by the plate printing method including the resin thick portion and its peripheral region, it is difficult to form the resin coat layer in a part or all of the outer peripheral region of the resin thick portion. Yes, the base material is exposed in the outer peripheral region of the resin thickened portion.
For this reason, there is a problem that the boundary between the exposed portion of the substrate and the resin coat layer is conspicuous in appearance, and the decorativeness of the label is impaired.

  The objective of this invention is providing the manufacturing method of the label base material from which the boundary of the exposed part of a resin coat layer and a base material is not conspicuous in appearance.

The location of the above problem will be described with reference to FIG. 13 (a). When the resin coat layer is formed by the plate printing method on the base material on which the resin thick portion is provided on the surface of the base material, As shown in FIG. 5B, a part where the base material is exposed is formed in a part or all of the outer peripheral area of the resin thickened part. This is because the thickness of the resin embossed portion is large, so that a cylindrical plate of a plate printing method (for example, a gravure roll or a flexo roll) is difficult to contact the outer peripheral region of the resin embossed portion, and the resin The coating layer cannot be formed and the substrate is exposed.
If it does so, as shown to the same figure (b), the boundary of the resin coat layer and the exposed part of a base material (outer peripheral area of a resin thick part) will become conspicuous in appearance.
In this regard, the present inventors have variously studied to form a resin coat layer so that the exposed portion does not occur. However, it is difficult to realize this by the plate printing method, and other than the plate printing method. Although it was also considered to apply the coating with high accuracy by this method, the manufacturing cost becomes too high, which is not realistic.

On the other hand, as a result of diligent research on the appearance that the boundary between the resin coat layer and the exposed portion of the substrate is conspicuous, it has been found that this is caused by the difference in light reflection between the resin coat layer and the exposed portion of the substrate. It was.
That is, the plate printing method is a method of forming a resin coating layer by applying a resin coating agent in innumerable dots, so that the obtained resin coating layer is microscopically a resin coating agent. The thickly adhering part and the thinly adhering part are alternately and continuously layered in the plane direction (in other words, the surface of the resin coat layer is microscopically viewed in the plane direction. It has fine irregularities that undulate). On the other hand, the surface of the substrate theoretically has fine irregularities, but is mirror-finished compared to the surface of the resin coat layer formed by the plate printing method.
It has been found that the reflection of light is different from the difference in surface roughness, and the boundary between the resin coat layer and the exposed portion of the substrate is conspicuous. Such a problem is not limited to the case where the resin thickened portion is provided on the base material, and may be a problem that may also occur on a base material on which unevenness having a relatively high level difference is formed by embossing, for example.
From this knowledge, the present inventors have completed the present invention by paying attention to minimizing the fine irregularities of the resin coat layer formed by the plate printing method as much as possible.

  In the method for producing a label base material of the present invention, a resin coating agent is printed on a first surface of a base material provided with a convex portion by using a plate printing method including the convex portion and its peripheral region. A step of forming an unsolidified thin film, a step of laminating a pressing sheet on the first surface of the unsolidified thin film and pressing it, and a step of peeling the pressing sheet after solidifying the thin film. .

In a preferable method for producing a label base material of the present invention, the first surface of the base material is a synthetic resin film surface, and the pressing surface of the pressing sheet is a synthetic resin film surface.
In a preferable method for producing a label base material of the present invention, the gloss ratio between the pressing surface of the pressing sheet and the first surface of the base material is 1-2.
In a preferable method for producing a label substrate of the present invention, the resin coating agent contains an ultraviolet curable resin, and the unsolidified thin film is solidified by ultraviolet rays. Preferably, at least one of the base material and the pressing sheet has a property of transmitting ultraviolet rays.

  According to the method for producing a label base material of the present invention, a label base material in which the boundary between the resin coat layer and the exposed portion of the base material is not noticeable can be obtained.

The partial omission plan view of the label base material of the present invention. The expanded sectional view cut | disconnected by the II-II line | wire of FIG. The schematic side view which shows the manufacturing process of the label base material of this invention. The top view of the base material seen from the arrow IV direction of FIG. The top view of the base material seen from the arrow V direction of FIG. FIG. 4 is an enlarged plan view of the VI-VI ′ portion of FIG. 3 cut along the longitudinal direction of the substrate. However, the nip roller is not shown in cross section. The top view of the label base material seen from the arrow VII direction of FIG. The enlarged plan view which cut | disconnected the VIII-VIII 'part of FIG. 3 along the longitudinal direction of a base material. The top view of the label base material seen from the arrow IX direction of FIG. The partial omission plan view of the label continuum which has a plurality of adhesion labels. The expanded sectional view cut | disconnected by the XI-XI line of FIG. The expanded sectional view of the label base material which concerns on a modification. The reference figure explaining the reason for obtaining the label base material with a conspicuous boundary.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the present specification, “first surface” refers to one surface in the thickness direction of the substrate, and “second surface” refers to the opposite surface. “Plan view” refers to viewing from the vertical direction with respect to the first surface of the substrate.
The numerical range represented by “lower limit value X to upper limit value Y” means a lower limit value X or more and an upper limit value Y or less. When a plurality of the numerical ranges are separately described, an arbitrary lower limit value and an arbitrary upper limit value can be selected, and “arbitrary lower limit value to arbitrary upper limit value” can be set.
In each figure, it should be noted that the thickness, its ratio, dimensions, and the like are different from the actual ones.

[Label substrate]
1 and 2 show a label substrate.
The label base material 1 includes a long strip-shaped base material 2, a resin thickening portion 3 (corresponding to a convex portion) provided on the first surface of the base material 2, and a first surface of the resin thickening portion 3. And a resin coat layer 4 provided on the first surface of the substrate 2.
The resin coat layer 4 forms the outermost layer of the label substrate 1.
The first surface of the base material 2 is exposed in part or all of the outer peripheral edge region of the resin thickened portion 3. Hereinafter, the portion where the first surface of the substrate 2 is exposed is referred to as an “exposed portion”.
The gloss ratio between the exposed portion 2a of the substrate 2 and the first surface of the resin coat layer 4 is 1-2. The ratio of the glossiness is the glossiness of the exposed portion of the substrate / the glossiness of the first surface of the resin coat layer, or the glossiness of the first surface of the resin coat layer / the glossiness of the exposed portion of the substrate. means.
That is, the exposed portion 2a of the substrate 2 and the first surface of the resin coat layer 4 are 1 ≦ glossiness of the exposed portion of the substrate / glossiness of the first surface of the resin coat layer ≦ 2 or 1 ≦ resin coat The relationship of the glossiness of the first surface of the layer / the glossiness of the exposed portion of the substrate ≦ 2 is satisfied.
Hereinafter, a case where such a relationship is satisfied may be referred to as “substantially the same glossiness”.
The glossiness refers to a value measured using a gloss meter. Specifically, in a standard state (23 ° C., 1 atm, relative humidity 50%), any three portions of the exposed portion of the base material were subjected to gloss meter (trade name “micro-TRI-” manufactured by BYK-Gardner). gloss ”), in accordance with JIS Z 8741 (angle 20 °), and the average value is taken as the glossiness of the exposed portion of the substrate. The glossiness of the first surface of the resin coat layer is also an average value measured in the same manner.

If necessary, a design printing layer 5 representing a label design may be provided on the first surface of the substrate 2. When the design print layer 5 is provided, the resin coat layer 4 is provided on the first surface of the design print layer 5 in the range where the design print layer 5 is provided.
In FIG. 1, in order to represent the region where the resin coat layer 4 is provided in an easy-to-understand manner, countless dots are added to the region (the same applies to FIG. 7).
When the label substrate 1 is processed into a label, the first surface side of the label substrate 1 is usually the surface side of the label, but the second surface side of the label substrate 1 is the surface side. It may be processed into a label.

<Base material>
The substrate 2 is not particularly limited as long as it has flexibility and strength as the label substrate 1.
As the base material 2, a synthetic resin film (including a laminated resin film in which a plurality of different or similar resin layers are laminated), a laminated film in which a layer other than the synthetic resin film and a synthetic resin film are laminated are used. Can do.
Examples of the other layers include a light barrier layer and / or a gas barrier layer (such as a metal vapor deposition layer); paper such as plain paper and fine paper; synthetic paper; non-woven fabric; These may be used alone or in combination of two or more and may be laminated on the synthetic resin film.
The base material 2 is preferably one in which the synthetic resin film surface constitutes the first surface of the base material 2 or the surface of the light barrier layer or gas barrier layer constitutes the first surface of the base material 2, and further, the synthetic resin film It is more preferable that the surface constitutes the first surface of the substrate 2.
Specific examples of the preferable substrate 2 include a synthetic resin film; from the first surface side to the second surface side, a synthetic resin film / other layer (for example, a metal deposition layer), or a synthetic resin film / other layer / Examples include laminated films such as synthetic resin films.
In the example of illustration, the base material 2 which consists of a synthetic resin film is represented.

Examples of the material of the synthetic resin film include polyester resins such as polyethylene terephthalate and polylactic acid, olefin resins such as polypropylene and cyclic olefin resin, styrene resins such as polystyrene and styrene-butadiene copolymer, and vinyl chloride. Examples thereof include thermoplastic resins such as resins.
The thickness of the base material 2 is not specifically limited, For example, they are 8 micrometers-500 micrometers, Preferably, they are 10 micrometers-200 micrometers. For example, the thickness of the base material 2 made of a synthetic resin film, synthetic paper, and a laminated sheet containing these is 8 μm to 200 μm, preferably 10 μm to 120 μm.

The base material 2 may be transparent (transparent means colored transparent or colorless transparent) or opaque from the viewpoint of translucency. Moreover, the base material 2 may transmit ultraviolet rays, or may not transmit ultraviolet rays. A synthetic resin film is usually transparent, and a laminated film having an opaque layer such as a metal vapor deposition layer and a synthetic resin film is opaque.
Here, in this specification, “transparent” means an arbitrary number (size 12 points) with black ink on white paper on the back side of the target substrate or target portion, at a location 1 cm away from the back side. A state where the printed material is arranged and the number can be identified from the front side through the target base material or the target portion. In this specification, “opaque” refers to a state in which numbers placed on the back side under the same conditions as described above cannot be seen from the front side through the target base material or target portion (a number cannot be recognized).
As an indicator of transparency (colorless transparency or colored transparency), for example, the total light transmittance can be used. As an indicator of transparency (colorless transparency or colored transparency), for example, the total light transmittance is 70% or more, preferably 80% or more, and more preferably 90% or more. However, the total light transmittance is the measurement target (in the case of a base material, when the base material itself is a part having a measurement target, a printed layer, etc., the transparent base material is provided with that part. Is a value measured by a measuring method based on JIS K 7361 (Testing method for total light transmittance of plastic-transparent material).

  In addition, the base material 2 may have heat shrinkability and / or self-stretchability from the viewpoint of shrinkage behavior, or may have substantially no heat shrinkability and self-stretchability. The heat shrinkability refers to a property of shrinking when heated to a desired temperature (for example, 70 ° C. to 100 ° C.). Self-stretching refers to the property of stretching by applying a tensile force and then restoring the original state by releasing the tensile force. In addition, as the base material 2 having substantially no heat shrinkability, for example, a base material having a heat shrinkage rate of 5% or less in each of the first direction and the second direction, preferably a heat shrinkage rate of 3%. The following base materials are mentioned.

As the base material 2 having heat shrinkability, a base material that mainly heat-shrinks at least in the first direction may be used, and a base material that slightly heat-shrinks or heat-extends in the second direction may be used. The first direction means one direction in the plane of the substrate, and the second direction is a direction orthogonal to the first direction in the plane. The heat shrinkage rate in the first direction (main heat shrinkage direction) of the base material 2 having heat shrinkability is not particularly limited, but is preferably 20% or more, more preferably 30% or more, and still more preferably. 40% or more. In addition, although the heat shrinkage rate in the said 1st direction is so preferable that it is large, since there exists a limit naturally, the heat shrinkage rate in the said 1st direction is theoretically less than 100%. When the base material 2 is a base material that changes heat in the second direction, the thermal contraction rate in the second direction is, for example, −3 to 15%, preferably 0 to 10%. The minus of the thermal contraction rate means thermal elongation.
However, the heat shrinkage rate is the length of the base material 2 (original length) before heating (stored at 23 ° C. standard pressure for 24 hours) and the base material 2 after being immersed in warm water of 85 ° C. for 10 seconds. The length (the length after immersion) is obtained from the following formula.
Thermal contraction rate (%) = [{(original length in the first direction (or second direction)) − (length after immersion in the first direction (or second direction))} / (first direction (Or the original length in the second direction)]] × 100.

Referring to FIG. 1, the base material 2 has a long band shape in plan view. The long band shape means a substantially rectangular shape in a plan view in which the length in the longitudinal direction is sufficiently longer than the width direction. As the long strip shape, for example, the length in the width direction is 20 mm to 4000 mm, the length in the longitudinal direction is 5 m or more, and preferably the length in the longitudinal direction is 10 m or more. The width direction is a direction orthogonal to the longitudinal direction.
Therefore, the label base material 1 is also in the shape of a long strip, and the label base material 1 is usually wound and stored in a roll.

<Design printing layer>
The design print layer 5 is a print layer representing a desired display such as a character or a pattern in a plan view. The design print layer 5 is provided as needed mainly for the purpose of decorating the label.
The design print layer 5 is a group of arbitrary designs composed of characters, pictures, and the like as one design pattern, and the design pattern (design print layer 5) is repeatedly printed in the longitudinal direction of the substrate 2. Yes. When the arrangement in the longitudinal direction is referred to as a “row”, the design print layer 5 may be provided in only one row in the width direction of the base material 2, but usually two or more rows (a plurality of rows) in the width direction. Provided, preferably 3 to 20 rows.
In FIG. 1, the range in which the design print layer 5 is provided is indicated by a short broken line, but the display of characters and the like is not shown.

The design print layer 5 is formed on the first surface of the substrate 2.
The design print layer 5 is formed by printing a conventionally known color ink on the first surface of the substrate 2 by a known printing method.
In addition, when the transparent base material 2 is used, the design print layer 5 may be provided on the second surface of the base material 2, or the design print layer is provided on the first surface and the second surface of the base material 2, respectively. 5 may be provided.
Although the thickness of the design printing layer 5 is not specifically limited, For example, they are 0.5 micrometer-20 micrometers, Preferably they are 1 micrometer-10 micrometers.

<Resin thick section>
The resin embossed portion 3 is formed mainly for the purpose of improving the decorativeness of the label, but may be formed for the purpose of adding a function such as a tactile discrimination symbol such as Braille.
The former target resin thickened portion 3 represents a desired display such as a character or a pattern in a plan view, and the latter target resin thickened portion 3 is formed to represent a tactile discrimination symbol or the like in a plan view. ing. In FIG. 1, for the sake of convenience, the resin thickened portion 3 is shown in an elongated rectangular shape.

Although the thickness of the resin buildup part 3 is not specifically limited, For example, they are 30 micrometers-300 micrometers, Preferably, they are 40 micrometers-250 micrometers.
The resin thickened portion 3 is formed on the first surface of the substrate 2. The resin build-up part 3 is formed in one place or a plurality of places. The resin build-up portion 3 may be formed across the first surface of the substrate 2 and the first surface of the design print layer 5. Further, when a plurality of resin thickening portions 3 are formed, all the resin thickening portions 3 may be formed on the first surface of the substrate 2 or a part of the resin thickening portions 3. Is formed on the first surface of the substrate 2 or on the first surface of the design printing layer 5, and the remaining resin thickened portion 3 is formed on the first surface of the design printing layer 5 or on the first surface of the substrate 2 and the design printing layer 5. It may be formed across one surface.
However, a part or all of the outer peripheral edge region of the resin thickened portion 3 does not have the design print layer 5, and is an exposed portion 2 a where the first surface of the substrate 2 is exposed.

The resin build-up part 3 contains a resin and may contain a colorant and / or an additive as necessary.
The resin thickened portion 3 may be either transparent or opaque.

<Resin coat layer>
The resin coat layer 4 is formed mainly for the purpose of protecting the first surface of the label substrate 1.
The resin coat layer 4 is provided in a solid shape on the first surface side of the substrate 2 including the first surface of the design printing layer 5 and the first surface of the resin thickened portion 3. The solid form means a state in which the resin coating agent that forms the resin coat layer 4 continuously extends in the surface direction to form one layer.
However, the resin coat layer 4 is not provided on the exposed portion 2 a of the base material 2 in a part or all of the outer peripheral region of the resin thickened portion 3, and one of the outer peripheral regions of the resin thickened portion 3 is not provided. The 1st surface of the base material 2 is exposed in the part or all.
In the illustrated example, the resin coat layer 4 is not provided at both ends in the width direction of the first surface of the substrate 2. Since both end portions in the width direction of the label substrate 1 are usually discarded as so-called ear portions when the label is processed, the resin coat layer 4 is not provided on the portions. But the resin coat layer 4 may be provided in the width direction both ends of the 1st surface of the base material 2. FIG.

The resin coat layer 4 is formed by printing a resin coating agent by a known plate printing method.
The resin coat layer 4 contains a resin and may contain silicone, a colorant, and / or an additive as necessary.
The resin coat layer 4 is transparent and preferably colorless and transparent so that the design of the design print layer 5 can be visually recognized.
Although the thickness of the resin coat layer 4 is not specifically limited, For example, they are 0.5 micrometer-5 micrometers, Preferably, they are 1 micrometer-3 micrometers.

[Label substrate manufacturing method]
The label substrate 1 can be manufactured, for example, as follows.
That is, in the method for producing a label base material of the present invention, the step of preparing a base material provided with a resin thickening portion, the resin thickness on the first surface of the base material provided with the resin thickening portion. A process of forming a non-solidified thin film by printing a resin coating agent using a plate printing method including the embankment and its peripheral region, and laminating and pressing a pressing sheet on the first surface of the non-solidified thin film And a step of peeling the pressing sheet after solidifying the thin film. In addition, you may have processes other than each said process.
Each of these steps may be performed in series on one production line, or one or more steps selected from the above steps may be performed on one line and the remaining steps may be performed on another one or Two or more lines may be used. Further, all of the steps may be performed by one practitioner, or one or more steps selected from the steps may be performed by one practitioner, and the remaining steps may be performed by another practitioner. The person may go.

FIG. 3 is a schematic side view showing each step of the manufacturing method of the label base material.
Here, after manufacturing the label base material 1, the case where a label (for example, adhesive label) is manufactured in series using the label base material 1 is illustrated.
Hereinafter, description will be made with reference to FIG. 3 while inserting diagrams necessary for each step.

<Formation of base material with resin thick section>
In the process of manufacturing a series of pressure-sensitive adhesive labels, for example, a raw material in which a pressure-sensitive adhesive layer and a release paper are laminated on the second surface of the substrate 2 is prepared. Usually, this raw fabric is wound into a roll.
In FIG. 3, the raw fabric 7 having the long belt-like base material 2 is pulled out from the roll product 29 wound in a roll shape, and conveyed onto the production line.
As the base material 2, the first surface is composed of the synthetic resin film surface or the surface of the light barrier layer or the gas barrier layer as described above, and more preferably a synthetic resin film is used.
On the production line, a printing machine 91 for forming the design printing layer 5 and a printing machine 92 for forming the resin thickened portion 3 are arranged.
A color ink is printed on the first surface of the base material 2 by the printing machine 91 and the color ink is solidified to form the design print layer 5 in the longitudinal direction of the base material 2.
The method for solidifying the color ink is appropriately set according to the type of ink, and examples thereof include drying and irradiation with light rays such as ultraviolet rays and electron beams. (Means for solidifying ink are not shown).

Here, in this specification, ink refers to a liquid material applied by a printing method. From the viewpoint of translucency, the ink is divided into a colorless transparent ink, a colored transparent ink, and an opaque ink, and the color ink is a colored transparent ink or an opaque ink.
A colorless transparent ink is an ink substantially free of a colorant (also called a medium ink). The colorless and transparent ink contains a binder resin, and may contain a solvent and / or an additive as necessary. The color ink (colored transparent ink, opaque ink) contains a binder resin and a colorant, and may contain a solvent and / or an additive as necessary.

When the binder resin is classified according to solidification performance, examples thereof include a photopolymerization type such as a dry type, an ultraviolet curable type, and an electron beam curable type. Examples of the dry binder resin include acrylic resins, urethane resins, cellulose resins such as nitrocellulose and cellulose / acetate / butyrate, vinyl chloride resins, vinyl acetate resins, and polyester resins. Examples of the photopolymerizable binder resin include acrylate-based photopolymerizable resins and polymerization initiators. Examples of the solvent include esters such as ethyl acetate, propyl acetate, and butyl acetate; alcohols such as methanol, ethanol, isopropyl alcohol, and butanol; ketones such as acetone and methyl ethyl ketone; hydrocarbons such as toluene; water; Or a mixed solvent thereof.
Examples of the colorant include known pigments or dyes.

After the design print layer 5 is formed, the resin thick portion 3 is formed by printing the ink on the first surface of the substrate 2 by the printer 92 and solidifying it. The printing machine 92 is preferably a silk screen printing machine (a printing machine to which a silk screen printing method is applied) since it can be easily thickened.
The resin build-up part 3 may be formed at one place or a plurality of places, and may be formed so as to overlap with the design print layer 5, but on a part or all of the outer peripheral area of the resin build-up part 3. It forms so that the exposed part 2a of the base material 2 may arise.
The ink forming the resin thickened portion 3 may be a colorless transparent ink or a color ink (colored transparent ink or opaque ink).
The ink solidification method for forming the resin thickened portion 3 is appropriately set according to the type of ink, and includes, for example, drying, irradiation with light rays such as ultraviolet rays and electron beams (the means for solidifying the ink is not illustrated). )
The resin build-up portion 3 is not limited to the case where it is formed by a printing method, for example, by attaching a molten resin containing no colorant or a molten resin containing a colorant to the first surface of the substrate 2. The resin thickened portion 3 can also be formed.

  In this way, as shown in FIG. 4, the design print layer 5 and the resin thickened portion 3 are formed as one design pattern on the first surface of the long belt-like substrate 2, and the design pattern is repeated in the longitudinal direction. Will be established. In the illustrated example, two rows are illustrated, but usually three or more rows (a plurality of rows) are provided in the width direction.

  In the above description, the resin thick portion 3 is formed on the substrate 2 after the design print layer 5 is formed. However, the design print layer 5 may be formed after the resin thick portion 3 is formed.

<Formation of unsolidified thin film>
By printing the resin coating agent on the first surface of the substrate 2 on which the design printing layer 5 and the resin thickened portion 3 are formed by the plate printing machine 93 (printing machine applying the plate printing method), An unsolidified thin film is formed.
Here, in the present specification, the plate printing method refers to a printing format using a printing plate, and includes an intaglio printing method, a relief printing method, a stencil printing method, a lithographic printing method, and the like. The intaglio printing method typically includes gravure printing, the relief printing method typically includes flexographic printing and relief printing, and the stencil printing method typically includes silk. Screen printing is exemplified, and a typical example of the lithographic printing method is an offset printing method.
The formation of the unsolidified thin film is preferably performed using an intaglio printing method or a relief printing method in terms of general purpose and good production efficiency.

As the resin coating agent, a colorless transparent ink or a colored transparent ink can be used, and preferably a colorless transparent ink can be used. Examples of the colorless and transparent ink include an abrasion-resistant varnish containing silicone.
The resin coating agent may be a dry type, but as will be described later, since the unsolidified thin film can be easily solidified in a state of being sandwiched between the base material 2 and the pressing sheet, A photopolymerization type such as an electron curable type is preferred.
As shown in FIG. 5, an unsolidified thin film 49 is formed by printing the resin coating agent on the first surface side of the substrate 2 including the resin thickened portion 3 and its peripheral region. In FIG. 5, the range of the resin coating agent (unsolidified thin film 49 to be formed) is shaded.
The thickness of the unsolidified thin film 49 is appropriately set in consideration of the thickness of the resin coat layer 4 to be formed, and is, for example, larger than the thickness of the resin coat layer 4 and not more than twice the thickness of the resin coat layer 4. .
As described above, since the thick resin portion 3 is thick, it is difficult for the cylindrical plate of the plate printing method to come into contact with the outer peripheral region of the thick resin portion 3. Does not adhere (the unsolidified thin film 49 cannot be formed), and the exposed portion 2a of the substrate 2 is generated.

<Pressing by pressing sheet>
A pressing sheet is laminated on the first surface of the unsolidified thin film 49 and pressed.
Specifically, the pressing sheet 6 is pulled out from the roll product 69 and is superimposed on the first surface side of the substrate 2 on which the unsolidified thin film 49 is formed.
The pressing sheet 6 is not particularly limited as long as it has flexibility and strength.
As the pressing sheet 6, for example, a synthetic resin film (including a laminated resin film in which a plurality of different or similar resin layers are laminated), a laminated film in which a layer other than the synthetic resin film and a synthetic resin film are laminated are used. Can be used.
The pressing sheet 6 is preferably configured such that the synthetic resin film surface constitutes the pressing surface of the pressing sheet 6 (the pressing surface refers to a surface in contact with the unsolidified thin film 49). In particular, the synthetic resin film itself is the pressing sheet 6. More preferably.
The material of the synthetic resin film is not particularly limited, and examples thereof include those exemplified for the substrate 2.

Moreover, as the pressing sheet 6, a sheet having a gloss ratio of 1-2 between the pressing surface and the first surface of the substrate 2 is preferable.
The glossiness ratio means the glossiness of the pressing surface of the pressing sheet / the glossiness of the first surface of the substrate, or the glossiness of the first surface of the substrate / the glossiness of the pressing surface of the pressing sheet.
That is, the pressing surface of the pressing sheet and the first surface of the substrate are 1 ≦ glossiness of the pressing surface of the pressing sheet / glossiness of the first surface of the substrate ≦ 2, or 1 ≦ first surface of the substrate. It is preferable to use the pressing sheet 6 that satisfies the relationship of glossiness / glossiness of the pressing surface of the pressing sheet ≦ 2.
The glossiness refers to a value measured using a gloss meter. Specifically, in a standard state (23 ° C., 1 atm, relative humidity 50%), an arbitrary three locations on the pressing surface of the pressing sheet are provided with a gloss meter (trade name “micro-TRI-” manufactured by BYK-Gardner). gloss ”), in accordance with JIS Z 8741 (angle 20 °), and the average value is taken as the glossiness of the pressing surface of the pressing sheet. The same applies to the base material. Hereinafter, a case where such a relationship is satisfied is sometimes referred to as “substantially the same glossiness”.
The preferable pressing sheet 6 can be appropriately selected in relation to the base material 2.
For example, the synthetic resin film of the pressing sheet 6 and the synthetic resin film of the substrate 2 may be different in material and have substantially the same gloss, or may be the same material and have substantially the same gloss. .
Preferably, the presser sheet 6 is preferably made of a synthetic resin film made of the same material as the substrate 2.

The pressing sheet 6 may be either transparent or opaque.
As described above, when the resin coating agent is mainly composed of a photopolymerizable resin such as an ultraviolet curable resin, the pressing sheet 6 has a property of transmitting light having a wavelength for curing the resin (for example, ultraviolet rays). It is preferable to have it. In view of cost, the pressing sheet 6 is preferably a polypropylene film having a property of transmitting ultraviolet rays or the like.
In addition, when the base material 2 which has the property which permeate | transmits the light (for example, ultraviolet-ray) of the wavelength which hardens the resin of a resin coating agent is used, the press sheet | seat 6 is the wavelength which hardens the resin. It may have the property of transmitting the light, or may not have it.

The thickness of the pressing sheet 6 is not particularly limited, but if it is too small, it may break, and if it is too large, the flexibility may decrease and it may be difficult to follow the first surface of the substrate 2. From this viewpoint, the thickness of the pressing sheet 6 is preferably 10 μm to 200 μm, and more preferably 10 μm to 150 μm.
The pressing surface of the pressing sheet 6 may be subjected to a peeling process (for example, applying a release agent such as silicone uniformly and thinly), but the resin coat layer having substantially the same gloss as the exposed portion 2a. 4 can be easily formed, it is preferable that the pressing surface of the pressing sheet 6 is not subjected to peeling treatment (that is, the pressing surface is preferably the film surface itself).

After the pressing sheet 6 is introduced onto the first surface of the base material 2, the nip roll 94 applies pressure in the direction in which the base material 2 and the pressing sheet 6 are in strong contact with each other to press the first surface of the unsolidified thin film 49. Press with sheet 6.
With reference to FIG. 6, the pressing surface of the pressing sheet 6 is brought into close contact with the first surface of the unsolidified thin film 49 by pressing of the nip roll 94, and the unsolidified thin film 49 is interposed between the substrate 2 and the pressing sheet 6. Clamped in close contact.
In addition, the code | symbol 72 of FIG. 6 shows a pressure-sensitive adhesive layer, and the code | symbol 73 shows a release paper. As described above, the raw fabric 7 is a laminate including the base material 2 / the pressure-sensitive adhesive layer 72 / the release paper 73.

<Formation of resin coating layer>
In a state where the unsolidified thin film 49 is sandwiched between the base material 2 and the pressing sheet 6, after the thin film 49 is solidified, the pressing sheet 6 is peeled off.
A light beam such as ultraviolet rays is applied to the unsolidified thin film 49 from the outside of the pressing sheet 6 and / or the substrate 2 using a light irradiation device 95. Then, the unsolidified thin film 49 is solidified while being sandwiched between the base material 2 and the pressing sheet 6, and becomes the resin coat layer 4.
In addition, when a dry-type resin coating agent is used, it is made to dry with a drying apparatus instead of a light irradiation apparatus.

<Peeling of presser sheet>
After the unsolidified thin film 49 is solidified to form the resin coat layer 4, the pressing sheet 6 is peeled off.
The peeled pressing sheet 6 is collected by the roll 96.
Thus, as shown in FIG. 7 and FIG. 8, the elongated base material 2, the resin thickening portion 3 provided on the first surface of the base material 2, and the resin thickening portion 3 A label substrate 1 having a first surface and a resin coat layer 4 provided on the first surface of the substrate 2 is obtained.

According to the production method of the present invention, it is possible to produce the label substrate 1 in which the boundary between the resin coat layer 4 and the exposed portion 2a of the substrate 2 is not noticeable.
As described above, when the resin coat layer is formed using the plate printing method, microscopic irregularities appearing in the surface direction when microscopically viewed. Therefore, although the unsolidified thin film 49 formed by printing the resin coating agent by the plate printing method also has fine irregularities, the thin film 49 is solidified on the first surface of the unsolidified thin film 49. By pressing and pressing the pressing sheet 6, the unevenness of the first surface of the unsolidified thin film 49 is substantially eliminated. In this state, the non-solidified thin film 49 is solidified to form the resin coat layer 4 and the pressing sheet 6 is peeled off, whereby the resin coat layer 4 having a first surface substantially free of irregularities is obtained.
The first surface of the resin coat layer 4 and the exposed portion 2a of the substrate 2 are similar in light reflection, and therefore the boundary between the first surface of the resin coat layer 4 and the exposed portion 2a of the substrate 2 is an appearance. It becomes difficult to stand out.
In particular, when the pressing sheet 6 has a pressing surface having substantially the same glossiness as that of the first surface of the substrate 2, the first surface has a gloss comparable to that of the pressing surface. The coat layer 4 can be formed. For this reason, the first surface of the resin coat layer 4 having substantially the same gloss as the exposed portion 2a of the substrate 2 (the first surface of the substrate 2) can be formed. The boundary of the exposed portion 2a of the material 2 is particularly inconspicuous. Even when forming a label with a high area ratio of the exposed portion of the substrate (commonly referred to as a clear-tone label), the boundary is conspicuous if the label substrate obtained by the production method of the present invention is used. A difficult label is obtained.

<Formation of label>
Next, the cutting line Y which cut | disconnects only the label base material 1 in the thickness direction is formed from the 1st surface side of the label base material 1 using cutting devices 98, such as a die roll. This cut line Y matches the outer shape of the label to be formed, and is formed so as to surround one design pattern (see FIG. 9).
A portion 19 (a so-called punched portion 19) outside the range surrounded by the cut line Y is collected on the roll 99. In FIG. 9, a thin slash is given to the punching bar portion 19.
When the punched-out portion 19 is removed, the label continuum 8 is obtained, and the label continuum 8 is wound up into a roll shape for storage and transportation.
As shown in FIGS. 10 and 11, the obtained label continuous body 8 is obtained by temporarily sticking the adhesive label 10 in order in the longitudinal direction of the release paper 73. The pressure-sensitive adhesive label 10 has a base material portion 28 cut out from the label base material 1 and a pressure-sensitive adhesive layer 72 provided on the second surface of the base material portion 28. The label continuum 8 is affixed to a strip-shaped release paper 73 so that a plurality of the adhesive labels 10 can be peeled off.

  In the above, when forming the resin thickened portion 3, the raw material of the base material 2 / the pressure-sensitive adhesive layer 72 / the release paper 73 is used, but the base having no pressure-sensitive adhesive layer or the like is used. By using the material 2, the label base material 1 as shown in FIG.1 and FIG.2 is obtained.

  Moreover, although the case where the label base material 1 was processed into an adhesive label was illustrated above, for example, the label base material 1 includes other labels such as a cylindrical label, a wound label, a glue label, an in-mold label, and the like. May be processed. The cylindrical label is obtained by forming a label base material into a cylindrical shape. The winding label is a label that is attached while being wound around the adherend. The glue label is a label attached to the adherend using an adhesive such as glue. An in-mold label is a label that is incorporated into a molded product during resin molding.

[Modification]
In the said embodiment, although the resin thickening part 3 is provided as a convex part in the 1st surface of the base material 2, a convex part is not restricted to a resin thickening part, For example, as shown in FIG. The protrusion 31 by deform | transforming the base material 2 itself may be sufficient.
Such a protrusion 31 is formed, for example, by embossing the base material 2. The protrusion 31 formed by embossing has a recess 32 on the opposite side.
The protrusion height (thickness) of the protrusion 31 is not particularly limited, and is, for example, 30 μm to 300 μm, and preferably 40 μm to 250 μm.
The label of the present invention is obtained by replacing the step of preparing the base material provided with the resin thick portion in [Label base material manufacturing method] described above with the step of preparing the base material 2 provided with the protrusions 31. The base material 1 can be manufactured. In addition, preparation of the base material 2 provided with the protrusion 31 includes performing embossing on the base material 2, for example.

1 Label base material 2 Base material 3 Resin thick part (convex part)
31 Projection (convex part)
4 Resin coating layer 49 Unsolidified thin film 5 Design printing layer 6 Presser sheet

Claims (5)

Forming a non-solidified thin film by printing a resin coating agent on the first surface of the substrate on which the convex portions are provided, using the plate printing method, including the convex portions and the peripheral regions thereof;
A step of laminating a pressing sheet on the first surface of the unsolidified thin film and pressing it;
A step of peeling the pressing sheet after the thin film is solidified;
The manufacturing method of the label base material which has this.   The manufacturing method of the label base material of Claim 1 whose 1st surface of the said base material is a synthetic resin film surface, and the pressing surface of the said pressing sheet is a synthetic resin film surface.   The manufacturing method of the label base material of Claim 1 or 2 whose ratio of the glossiness of the pressing surface of the said pressing sheet and the 1st surface of the said base material is 1-2.   The method for producing a label substrate according to any one of claims 1 to 3, wherein the resin coating agent includes an ultraviolet curable resin, and the unsolidified thin film is solidified by ultraviolet rays.   The manufacturing method of the label base material according to claim 4, wherein at least one of the base material and the pressing sheet has a property of transmitting ultraviolet rays.

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