label

Abstract

To provide a label that can ensure non-adhesive properties in areas that are to be non-adhesive. [Solution] A label having a surface substrate and a re-moistened adhesive layer containing a re-moistened adhesive, wherein a partially tackiness-suppressing layer is disposed on the re-moistened adhesive layer on the side opposite to the surface substrate.

Description

Technical Field

[0001] The present invention relates to labels.

Background Art

[0002] Conventionally, as an effective means for promoting the sale of products, labels called POP labels or eye-catching labels that display catchphrases and the like related to the products (hereinafter, such labels are simply referred to as POP labels) have been used. Such labels usually have an adhesive part that can be attached to an article and a non-adhesive part that protrudes from the article. By attaching the adhesive part to the article, the non-adhesive part protrudes from the product, and when the product is displayed, it can attract the attention of consumers (see, for example, Patent Document 1).

[0003] As a process for making a part of the adhesive part a non-adhesive part like a POP label, a process of applying varnish or silicone release agent to the adhesive part to make it a non-adhesive part is performed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When non-adhesive treatment is performed by applying varnish or silicone release agent to the adhesive part, for example, when pressure is applied to a laminate such as a long roll, particularly at a location where pressure is particularly applied such as the roll core part, the adhesive may bleed out from the non-adhesive part, and adhesiveness may be exhibited at the non-adhesive part.

[0006] Therefore, an object of the present invention is to provide a label that can ensure the non-adhesiveness of a portion desired to be a non-adhesive part.

Means for Solving the Problems

[0007] The present invention provides the following:

[0008] (1) A label having a surface substrate and a re-moistened adhesive layer containing a re-moistened adhesive, A label comprising a partially adhesive-suppressing layer disposed on the re-moistened adhesive layer on the side opposite to the surface substrate.

[0009] (2) The label according to (1), wherein the adhesive strength of the adhesiveness-suppressing layer surface is 0.2 N / 25 mm or less.

[0010] (3) The label according to (1) or (2), wherein the tackiness-suppressing layer is a coating layer.

[0011] (4) A label according to any of (1) to (3) on which the re-wet adhesive layer is exposed.

[0012] (5) A label described in any of (1) to (4) that is affixed to the article in a state that is exposed to the outside of the article.

[0013] (6) The label according to any one of (1) to (5), wherein the adhesiveness-suppressing layer is arranged at the end. [Effects of the Invention]

[0014] According to the label of the present invention, the non-adhesiveness of the portion to be treated as non-adhesive can be ensured. [Brief explanation of the drawing]

[0015] [Figure 1] Figure 1(A) is a cross-sectional view of a label according to one embodiment of the present invention. Figure 1(B) is a plan view of the label of Figure 1(A) as seen from the side of the tackiness-suppressing layer. [Figure 2] Figure 2 shows an example of a use case for the label in the form shown in Figure 1. [Modes for carrying out the invention]

[0016] Embodiments of the present invention will be described below with reference to the attached drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant explanations are omitted. Also, the dimensional ratios in the drawings are exaggerated for illustrative purposes and may differ from the actual ratios.

[0017] Figure 1(A) is a cross-sectional view of a label according to one embodiment of the present invention, and Figure 1(B) is a plan view of the label in Figure 1(A) from the non-adhesive layer side. In Figure 1, the label 10 consists of a surface substrate 11, a re-wet adhesive layer 12, and an adhesiveness suppression layer 13. The adhesiveness suppression layer 13 is partially formed on the re-wet adhesive layer 12, and the area 14 of the re-wet adhesive layer 12 that is not covered by the adhesiveness suppression layer 13 becomes the area to be actually attached to the substrate.

[0018] The adhesive constituting the re-moistened adhesive layer 12 is a re-moistened adhesive. Since the re-moistened adhesive exhibits tackiness when water is applied, it does not exhibit tackiness when water is not applied. Therefore, even when pressure is applied to the label, such as by the winding pressure of a long roll, there is little leakage of adhesive from the re-moistened adhesive layer into the tackiness-suppressing layer, thus ensuring non-tackiness in areas that are to be non-stick. Furthermore, while adhesive layers that are always tacky require a release liner before use, the re-moistened adhesive layer does not require a release liner, thus reducing the environmental impact. Therefore, a label according to one embodiment of the present invention does not include a release liner. Moreover, compared to partial application of the re-moistened adhesive layer to the surface substrate, providing the tackiness-suppressing layer on top of the re-moistened adhesive layer to form non-stick areas has the advantage of enabling the production of labels in small batches.

[0019] As shown in FIG. 1, a form in which an adhesiveness manifestation suppression layer is disposed at an end is a preferred embodiment. Since the rewet adhesive exhibits tackiness when water is applied, when attaching the adherend, it is necessary to wet the label with water. Even if the label is wetted with water, the adhesiveness manifestation suppression layer has no tackiness. Therefore, by disposing the adhesiveness manifestation suppression layer at the end of the label, when attaching the label to the adherend, even after wetting the label with water, the adhesiveness manifestation suppression layer can be grasped without sticking to the hand or gripping member, etc., making it easy to attach the label to the adherend. In FIG. 1, an adhesiveness manifestation suppression layer is formed at one end in the length direction of the rectangular label. However, for example, the adhesiveness manifestation suppression layer may be formed substantially parallel to the opposing edges, that is, along the four circumferences.

[0020] Hereinafter, each member constituting each label will be described. In this specification, "X~Y" indicating a range means "X or more and Y or less". Also, unless otherwise specified, operations and measurements of physical properties are performed under the conditions of room temperature (20~25°C) / relative humidity 45~55%RH. Further, in this specification, "(meth)acrylic acid" refers to "acrylic acid or methacrylic acid". In the following description, the label of the present invention may be simply referred to as "label". Note that the concept of "label" includes those referred to as film, sheet, tape, etc.

[0021] (Base material) The base material is not particularly limited, and examples include resin base materials; so-called synthetic paper composed of resin; metal foils such as copper, aluminum, and stainless steel, composite sheet base materials obtained by laminating a metal foil and a plastic film, vapor-deposited foil base materials vapor-deposited with aluminum, silica, etc., non-woven fabric base materials, or paper base materials. Examples of resin base materials include polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyvinyl chloride, polystyrene, polyurethane, polycarbonate, polyamide, polyimide, polyetherimide, poly(meth)acrylate, polybutene, polybutadiene, polymethylpentene, acrylic urethane, ethylene vinyl acetate copolymer, ethylene (meth)acrylic acid copolymer, ethylene (meth)acrylate copolymer, ABS resin, ionomer resin, and various thermoplastic elastomers. A film made of at least one resin selected therefrom, or a single-layer or multi-layer laminated film selected therefrom can be used. The paper base material is not particularly limited, and examples include high-quality paper, kraft paper, glassine paper, coated paper, art paper, cast-coated paper, impregnated paper, foamed paper, synthetic paper, thermal paper, dust-free paper, parchment paper, rayon paper, recycled paper, etc. Also, the paper base material may be a laminate obtained by laminating two or more of these.

[0022] As the base material, paper, polyethylene terephthalate and its metal-vapor-deposited base material, polypropylene and its metal-vapor-deposited base material, or polyethylene is preferred. Especially when recycling the object to be pasted after use, since it is easy to peel off in the washing process, a paper base material is more preferred. Also, from the viewpoint of ease of use as a label, it is more preferably high-quality paper, glassine paper, coated paper, art paper, cast-coated paper, thermal paper, recycled paper, etc.

[0023] On the surface of the surface base material (on the side opposite to the rewet adhesive layer), various information such as characters, numbers, symbols, and figures may be recorded (printed).

[0024] Furthermore, the surface substrate may have a printable coating layer on its surface.

[0025] The thickness of the surface substrate is not particularly limited, but is preferably 10 μm to 200 μm, more preferably 20 μm to 150 μm, and even more preferably 30 μm to 100 μm. Such a thickness provides good handling during application.

[0026] (Rewetting adhesive layer) Examples of materials for re-wettable adhesives include protein-based materials such as gelatin, casein, albumin, and soy protein; hydrated carbon-based materials such as starch and dextrin; cellulose-based materials such as methylcellulose, hydroxyethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, and bissose; and water-soluble compounds such as gum arabic, tragacanth gum, sodium alginate, polyvinyl alcohol, and polyvinyl acetate. These materials may be used individually or in combination of two or more. In particular, from the viewpoint of tack performance, the adhesive constituting the re-wettable adhesive layer is preferably a re-wettable adhesive containing at least one selected from the group consisting of polyvinyl alcohol-based adhesives, starch-based adhesives, cellulose-based adhesives, and polyvinyl acetate-based adhesives, and more preferably a re-wettable adhesive containing a polyvinyl alcohol-based adhesive.

[0027] Examples of polyvinyl alcohol used in polyvinyl alcohol-based adhesives include unmodified polyvinyl alcohol and modified polyvinyl alcohol.

[0028] Examples of modified polyvinyl alcohols include α-olefin-modified polyvinyl alcohol, cation-modified polyvinyl alcohol, anionic-modified polyvinyl alcohol, silanol-modified polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, and mercapto-modified polyvinyl alcohol.

[0029] The adhesive strength of the re-wetted adhesive layer depends, for example, on the degree of polymerization of the polyvinyl alcohol constituting the adhesive layer, preferably being 300 to 5000, more preferably 350 to 4900, and even more preferably 400 to 4800.

[0030] This makes it possible to improve the solubility of polyvinyl alcohol in water, allowing for the more favorable formation of a re-wettable adhesive layer, and also improves the adhesive strength when water is applied.

[0031] In this specification, "degree of polymerization of polyvinyl alcohol" refers to the value measured by a method conforming to the "average degree of polymerization" described in JIS K 6726:1994.

[0032] Even if the degree of polymerization of polyvinyl alcohol is within the aforementioned range, the adhesion of the re-wetted adhesive layer can be adjusted by varying the degree of polymerization.

[0033] For example, if the degree of polymerization of polyvinyl alcohol is in a relatively low range, the polyvinyl alcohol becomes more soluble in water, which can improve the initial adhesive strength of the re-moistened adhesive layer, or in other words, the adhesive strength after water is added to the re-moistened adhesive layer to induce tackiness and then it is applied to the substrate before it dries.

[0034] Furthermore, if the degree of polymerization of polyvinyl alcohol is in a relatively high range within the aforementioned range, the adhesive strength of the re-moistened adhesive layer after drying, in other words, the adhesive strength when the re-moistened adhesive layer is given water to develop tackiness, attached to the adherend, and then dried to form a film, will be high.

[0035] This allows for better final adhesive strength.

[0036] Furthermore, the degree of polymerization of polyvinyl alcohol can be determined according to the adhesive properties that are important in the re-wetted adhesive layer, such as the initial adhesive strength after application to the substrate or the adhesive strength after drying.

[0037] Furthermore, considering the balance between the two above, it is also preferable to combine polyvinyl alcohols with high and low degrees of polymerization. Specifically, polyvinyl alcohol A, which has a degree of polymerization of 300 to 800, may be combined with polyvinyl alcohol B, which has a degree of polymerization of 2000 to 5000. The degree of polymerization of polyvinyl alcohol A is more preferably 350 to 700, and even more preferably 400 to 600. The degree of polymerization of polyvinyl alcohol B is more preferably 2300 to 4900, and even more preferably 4200 to 4800. The mixing ratio of polyvinyl alcohol A to polyvinyl alcohol B is preferably 30:70 to 70:30 by mass, more preferably 35:65 to 65:35, and even more preferably 40:60 to 60:40.

[0038] The degree of saponification of the polyvinyl alcohol is preferably 70 mol% to 90 mol%, more preferably 75 mol% to 90 mol%, and even more preferably 80 mol% to 90 mol%. This makes it possible to improve the tackiness that develops when water is applied to the adhesive layer.

[0039] In this specification, "degree of saponification of polyvinyl alcohol" refers to the value measured by a method conforming to the "degree of saponification" described in JIS K 6726:1994.

[0040] Examples of starches used in starch-based adhesives include cornstarch, wheat flour, sweet potato starch, potato starch, and tapioca. Note that this includes modified starch.

[0041] Polyvinyl acetate adhesives consist of polymers containing vinyl acetate as monomer units, and examples of constituent materials include polyvinyl acetate and ethylene-vinyl acetate copolymers.

[0042] Examples of materials that make up cellulose-based adhesives include methylcellulose, hydroxyethylcellulose, ethylhydroxyethylcellulose, carboxymethylcellulose, and biscellulose.

[0043] The re-wet adhesive layer may contain other components. Examples of other components include fillers, softeners, heat and light stabilizers, antioxidants, and crosslinking agents.

[0044] The thickness of the re-wetted adhesive layer is, for example, 3 to 30 μm.

[0045] The re-wettable adhesive layer can be formed, for example, by mixing the above components with a solvent (e.g., water) to prepare an adhesive layer-forming composition, and then coating the composition onto a substrate. The solid content of the adhesive layer-forming composition is, for example, 5 to 60% by mass.

[0046] Methods for applying the adhesive layer-forming composition include, for example, the roll coating method, bar coating method, knife coating method, roll-knife coating method, blade coating method, die coating method, and gravure coating method.

[0047] After coating, the adhesive layer-forming composition is dried to form a re-moistened adhesive layer. This removes the moisture contained in the coated adhesive layer-forming composition, and the adhesive layer is formed. Drying can be done, for example, by natural drying or air drying, but it is preferable to dry it by heating. The drying temperature is preferably 60°C to 100°C, and more preferably 70°C to 90°C.

[0048] [Adhesion-suppressing layer] The tackiness-suppressing layer remains non-adhesive even after water is applied. "Adhesive" refers to an adhesive strength similar to that of a normal tack label, while "non-adhesive" refers to an adhesive strength lower than that. Specifically, the tackiness-suppressing layer preferably has an adhesive strength of 0.2 N / 25 mm or less (lower limit 0 N / 25 mm), and may be 0.01 to 0.1 N / 25 mm. Here, the adhesive strength is measured by cutting a label containing the tackiness-suppressing layer to a size of 25 mm in width and 250 mm in length, leaving it to stand for one day in a standard environment (23°C, 50% RH), and then attaching the tackiness-suppressing layer side to a polyethylene terephthalate board. After standing for 24 hours in a standard environment, the adhesive strength is measured according to JIS Z0237:2009. Specifically, the label is peeled off in a 180° direction at a test speed of 0.3 m / min using a tensile testing machine, and the adhesive strength is measured. The values ​​are converted to peeling force per 25mm of film width (N / 25mm).

[0049] The tackiness-suppressing layer is partially provided on the re-moistened adhesive layer in order to leave an exposed re-moistened adhesive layer for adhesion to the substrate (the re-moistened adhesive layer is partially exposed). The area of ​​the tackiness-suppressing layer is, for example, 60% or less of the area of ​​the re-moistened adhesive layer before the formation of the tackiness-suppressing layer, may be 30% or less, 1 to 60%, or 3 to 30%.

[0050] The tackiness-suppressing layer may be a film such as a polyolefin film or polyester film, or a coating layer, but it is preferable to be a coating layer because it allows for thinning and easier acquisition of the effects of the present invention. The coating layer may be a varnish layer obtained by applying varnish, a medium layer obtained by applying a medium, or a release agent layer obtained by applying a release agent. Specifically, preferred materials constituting the tackiness-suppressing layer include oil-based varnishes, organic solvent-based or solvent-free UV-curing varnishes, etc.; water-based varnishes; and organic solvent-based or solvent-free release agents containing silicone, long-chain alkyl polymers, polyolefins, alkyd resins, fluorine compounds, etc. Examples of organic solvents include acetone, acetonitrile, ethanol, methanol, isopropanol, glycerin, ethylene glycol, and propylene glycol. Organic solvents may be used individually or in combination of two or more.

[0051] The material constituting the tackiness suppression layer may be a commercially available product, such as No.2 UV L Carton OP Varnish NW, No.6 UV L Carton OP Varnish GW, No.6 UV L Carton OP Varnish SP-2, UV L Carton OP Varnish KS, UV161 OP Varnish S, UV L Gloss OP Varnish M, UV Peel-Off OP Varnish Series, UV HJK Undercoat Varnish, UV Dry Pack OP Varnish NK, UV Pack OP Varnish NS, UV Pack OP Varnish SK-T, No.3 UV Wet Pack Matte OP Varnish L, UV Gloss OP Varnish CP-3, UV LTP FL OP Varnish, UV Coat Varnish AT-B, UV Coat Varnish BL-W, UV Coat Varnish HTA-W, UV Coat Varnish TG-2, UV Coat Varnish TH-3, UV Coat Varnish PC-3KW2, No.2 UV Flexonis FT-P, UV Flexonis FV-2, etc. (all from T&K Toka Co., Ltd.); K OP Varnish-2, TOYO KING (registered trademark) Matte OP Varnish, LOK Examples include 603 OP varnish, etc. (all manufactured by Toyo Ink Co., Ltd.).

[0052] The thickness of the tackiness-suppressing layer is, for example, 0.5 to 10 μm, and may be 1 to 50 μm, 1 to 30 μm, or 1 to 20 μm.

[0053] [How to use the label] The label according to the present invention is attached to the substrate by applying water to the re-moistened adhesive layer to give it tackiness, and then using the re-moistened adhesive layer. The water applied to the re-moistened adhesive layer is not particularly limited, but for example, tap water, deionized water, etc., can be used, and liquids containing water can also be used.

[0054] The method for applying water to the re-wetted adhesive layer is not particularly limited, but examples include using a spray bottle, brush, sponge, sponge roller, etc.

[0055] [Label uses] The label is used, for example, as a POP label. Figure 2 shows one way in which the label of the present invention is used. As shown in Figure 2, the label 10 of the embodiment is used by being affixed to an article 16. In the case of a POP label, the label 10 is affixed to the article 16 with the area 15 containing the tackiness-suppressing layer exposed to the outside. The label 10 is referred to as a POP label or eye-catching label, and plays a role in attracting the attention of consumers when the labeled article 16, with the label 10 affixed to it, is displayed in a store.

[0056] Article 16 is a product displayed in a store, such as cosmetics, pharmaceuticals, or daily necessities, but is not particularly limited to any specific type of product. Therefore, the shape of Article 16 shown in the illustration is merely an example and will vary depending on the type of product; for example, it may be in the shape of a box or a bottle.

[0057] Label 10 is attached to article 16 by applying water to the area 14 of the re-moistened adhesive layer 12 that is not covered by the tackiness-suppressing layer 13 (exposed re-moistened adhesive layer area). The tackiness-suppressing layer 13 becomes the portion (area 15) that protrudes from article 16.

[0058] Label 10 has a display section (not shown) on the substrate for displaying information. The display section may, for example, display a catchy slogan about sales performance or efficacy as information related to the item 16, but the type of information displayed by the display section is not particularly limited, and may display, for example, information about a contest or an announcement of a new product. Furthermore, the information displayed by the display section is not limited to letters and numbers, but may also be illustrations, photographs, graphs, or a combination thereof. The display section is formed, for example, by printing.

[0059] Although labels according to embodiments of the present invention have been described above, the present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the invention. [Explanation of Symbols]

[0060] 10 labels, 11 surface base material, 12 rewetting adhesive layer, 13. Adhesion inhibition layer, 14. Exposed re-wetted adhesive layer region, 16 Goods.

Claims

1. A label comprising a surface substrate and a re-moistened adhesive layer containing a re-moistened adhesive, A label comprising a partially adhesive-suppressing layer disposed on the re-moistened adhesive layer on the side opposite to the surface substrate.

2. The label according to claim 1, wherein the adhesive strength of the adhesive-suppressing layer surface is 0.2 N / 25 mm or less.

3. The label according to claim 1 or 2, wherein the tackiness-suppressing layer is a coating layer.

4. The label according to claim 1 or 2, wherein the re-wet adhesive layer is exposed.

5. A label according to claim 1 or 2, which is affixed to the article in a state where it is exposed to the outside from the article.

6. The label according to claim 1 or 2, wherein the tackiness-suppressing layer is arranged at the end.

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