JP2012008304A - Label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a label capable of reading printed information on a lower side of a label base material even when the label made of a paper-based material stuck to a bottle has been removed by hand.SOLUTION: A label that is specifically for a glass bottle among the bottles includes: printed layers on upper and lower sides of the label base material; a filling layer for preventing an adhesive having adhesiveness to the glass bottle from penetrating into the label base material and the printed layers; and the adhesive layer on the surface of the filling layer.

Description

  The present invention relates to a label for bottles such as glass, plastic and metal cans. More specifically, the present invention relates to a label provided with a printing layer on and below a label base made of a paper-based material, and after the label is manually peeled off from the bottle, the information on the lower printing layer can be read.

  Bottles such as glass, plastic, metal cans, beverages such as juice, beer, coffee, tea, alcoholic beverages such as sake, wine, health drinks such as energy drinks, seasonings, liquids such as cosmetics, and coffee, cocoa It is widely used as a container for storing powders.

  Conventionally, paper labels, synthetic papers, and films have been used as labels for bottle labels. On the upper side of the label base material, there is a concealing property, high gloss and cosmetics by the combination of a printed layer of characters and pictures and an aluminum (AL) vapor deposition layer. And an adhesive layer having adhesiveness is provided.

  The general label configuration is printed layer / paper, printed layer / AL / paper, printed layer / AL evaporated paper, printed layer / AL evaporated PET / paper, OPP / printed layer / paper, OPP / printed layer, printed layer. / Synthetic paper, printing layer / PET, printing layer / OPP, etc. Depending on the contents, the label configuration is appropriately determined from the distribution conditions and the store environment at the store.

  Adhesives such as starch-based, EVA-based, vinyl acetate-based, casein-based adhesives, acrylic pressure-sensitive adhesives, hot melt agents, delate tack agents, etc. are used on the bottom side of the label base material for bonding to the bottle. Yes.

  Among bottles such as glass, plastic and metal cans, especially glass bottles are collected after use, washed and separated into glass bottles and labels. Glass bottles are developed into those that are reused like beer bottles, those that are regenerated into glass bottles after pulverization, and those that are mixed with other materials after pulverization and used for industrial materials.

  Moreover, in order to separate into a glass bottle and a label at the time of a washing bottle, a part of label base material and a part of adhesive agent remain | survive in a glass bottle, and may prevent reuse and reuse. In order to facilitate separation into glass bottles and labels, proposals have been made to give labels easy peelability. For example, label peeling at the time of washing bottles is improved by making the adhesive to glass bottles alkali-soluble.

  Conventionally, printing on the lower side of a label substrate made of a paper-based material has hardly been performed. The printed information is difficult to see because it is read through the contents of the glass bottle. Further, since the used bottles are collected, washed and separated from the labels, the separated labels swell with the washing liquid, and there is a problem that the printing information cannot be read.

  Therefore, if the print information on the lower side of the label can be read, the information medium by printing spreads. It can be used for various purposes such as advertisements, precautions, campaign notifications, and gift application.

  However, printing on the lower side of the label base material made of a paper-based material can be performed by a general printing method. However, when the label is peeled off from the glass bottle, there is a problem that part or all of the print information is damaged and cannot be read.

  This is because the adhesive penetrates the printed layer and the label base material when applying the adhesive for sticking to the glass bottle, and part or all of the label base material remains in the glass bottle when the label is peeled off. The print information cannot be read correctly. Further, even if the label substrate is peeled off, there is a problem that the printing information cannot be accurately read because part or all of the printing layer is damaged.

  In order to facilitate separation into glass bottles and labels, proposals have been made to give labels easy peelability. The adhesive to the glass bottle is alkali-soluble. This method is difficult in practical use because alkaline chemicals are used in the home.

  Moreover, in order to peel off a label easily, there exists a proposal of the label using the hot-melt-adhesive agent which can be peeled off when immersed in water (patent document 1).

  However, since it is soaked in water, the label base material swells and the printed information on the back side cannot be read.

    In addition, there is a proposal of a label that is easily peeled by winding a label around a container, overlapping both ends of the label, and partially providing an adhesive part (Patent Document 2).

  Since this method winds around a container by winding once and overlaps both ends of a label, it is a method of sticking a label partially, and is different from the present invention.

  In addition, there is a proposal that an alkali-soluble resin coating film is provided on the back surface of the label base material to facilitate peeling (Patent Document 3).

  This method is a proposal to dissolve the coating film of the alkali-soluble resin and peel off the label, but it is difficult in practical use because an alkaline chemical is used in the home.

JP-A-11-224052 JP 2007-86595 A Japanese Patent Laid-Open No. 11-85033

  The present invention provides a label that allows the printed information on the lower side of the label substrate to be read even if the label made of a paper-based material attached to a bottle such as glass, plastic, or metal can is manually peeled off.

  In the invention according to claim 1 of the present invention, in a label that is detachably attached to the bottle surface, a printing layer on the upper and lower sides of the label base material, a sealing layer that covers the printing layer on the lower surface, and an adhesive layer are sequentially laminated. It is a label characterized by this.

  The invention according to claim 2 of the present invention is characterized in that an anti-curl layer for preventing label curling is laminated between the label substrate and the printed layer, or between the printed layer and the sealing layer. The label according to Item 1.

In the invention according to claim 3 of the present invention, the sealing layer is at least a cellulose resin, a urethane resin, a vinyl chloride-vinyl acetate copolymer resin, an amide resin alone, or a combination of two or more of these resins. The label according to claim 1, wherein the label is made of a resin.

  The invention according to claim 4 of the present invention is the label according to any one of claims 1 to 3, wherein the label base material is made of a paper-based material.

  The label of the present invention is such that the printed information on the lower side of the label substrate can be read even if it is peeled off by hand. In particular, it is a label that can be peeled between the sealing layer and the adhesive layer by providing a sealing layer so that the adhesive used for bonding to the bottle does not penetrate into the printed layer and the label substrate. It is a label that can read the printing information without breaking the material of the label substrate and removing the printed layer. The material breakage of the label base material means a state in which a part or all of the label base material remains on the surface of the bottle.

It is sectional drawing which shows an example of the laminated constitution of the label of this invention. It is sectional drawing which shows an example of the laminated constitution of the label of this invention. It is sectional drawing which shows an example of the laminated constitution of the label of this invention. It is sectional drawing which shows an example of the laminated constitution of the label of this invention. It is explanatory drawing which shows an example of the usage condition of the label of this invention. It is explanatory drawing which shows an example of the usage condition of the label of this invention.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. A glass bottle was used as the bottle.

  1 and 2 are cross-sectional views showing an example of the layer structure of the label 1 of the present invention. This is a label in which an anti-curl layer 11 is provided on the lower side of the label substrate 10, and a printing layer 13, a sealing layer 14, and an adhesive layer 15 are sequentially provided on the surface of the prevention layer.

  On the upper side of the label substrate 10, a printing layer 12 and a metal vapor deposition layer (not shown in the figure) are provided for the sake of beauty. Further, a protective layer 16 is provided as shown in FIG. 2 in order to increase the wear resistance.

  Further, an anti-curl agent is applied to the lower side of the label substrate 10 to provide an anti-curl layer 11. This is problematic in that, when the label is automatically attached to the glass bottle 17 with the adhesive 15, if the label is curled, it is difficult to attach automatically. As a countermeasure, an anti-curl agent is applied.

  Next, the printing layer 13 is provided on the surface of the coating film of the anti-curl layer 11. This printed layer 13 cannot be read from the upper side of the label. It is difficult to see the concealability of the label substrate 10 and the printed layer 12 on the upper side of the label substrate. When the label is peeled off from the glass bottle 17, the printing layer 13 can read the printing information from the peeled surface.

  Next, a sealing layer 14 is provided on the surface of the printing layer 13 in order to make it possible to read the printing information of the printing layer 13. This sealing layer 14 has a role of preventing the penetration of the adhesive 15 used for attaching the label 1 to the glass bottle 17 into the label base material 10 and the printing layer 13. Next, an adhesive layer 15 is provided on the surface of the sealing layer 14 to form a label, which is attached to a glass bottle.

Conventionally, if it is necessary to provide a printing layer under the label substrate, an adhesive layer is provided on the printing surface. In this method, when the adhesive is applied, the adhesive penetrates to the inside of the label base material or penetrates to the surface or inside of the printing layer. When the label is peeled off from the glass bottle, the adhesive that has penetrated the label base material and the print layer causes material breakage of the base material and peeling from the print layer, so that the printing information cannot be read.

  Therefore, by providing the sealing layer 14 between the printing layer 13 and the adhesive layer 15 as shown in FIG. 1 or FIG. 2, when the adhesive is applied, the printing layer 13 on the back side of the adhesive and the label substrate 10 are applied. Can be prevented. Therefore, when the label 1 is peeled off from the glass bottle 17, it is peeled off between the sealing layer 14 and the adhesive layer 15, and the printing information of the printing layer 13 can be read. FIG. 1 shows an example in which the printing layer 12 is provided on the upper side of the label base material, and FIG. 2 shows an example in which the printing layer 12 and the protective layer 16 are provided on the upper side of the label base material.

  3 and 4 are cross-sectional views showing an example of the layer structure of the label of the present invention. In this label, a printing layer 13 is provided on the lower side of the label base material, and an anti-curl agent layer 11, a sealing layer 14, and an adhesive layer 15 are sequentially provided on the surface of the printing layer 13. 3 shows the printing layer 12 on the upper side of the label base material, and FIG. 4 shows the printing layer 12 and the protective layer 16 on the upper side of the label base material.

  The label 1 of the present invention can also be provided with an anti-curl layer 11 on the surface of the print layer 13 as shown in FIGS. The thickness can be determined as appropriate in consideration of the thickness of the label base to be used, the basis weight, the type of resin of the printing layer, the coating amount, and the like.

  FIG. 5 is an explanatory diagram showing an example of a usage pattern of the label 1 of the present invention. It is explanatory drawing which shows an example of the state which stuck the label 1 of this invention to the glass bottle. It is the state stuck on the glass bottle generally used.

  FIG. 6 is an explanatory diagram showing an example of a usage pattern of the label 1 of the present invention. It is explanatory drawing which shows an example of the state which has peeled the label of this invention from the glass bottle 17 by hand. The label 18 after peeling shows a state where the print information 19 on the lower side of the label base material can be read. The residual adhesive layer 20 remains in the glass bottle.

As the label base material used in the present invention, a paper base material having excellent properties in mechanical, physical, chemical and others can be used. Paper, synthetic paper, clay coated paper, kraft paper, imitation paper, various types of paperboard and processed paper can be used. Coated paper, art paper, AL vapor-deposited paper and the like can be used because of the cosmetic properties of the label surface. Those ^50g / ^{m 2 ~250g} / m 2 basis weight of the paper substrate can be used.

  The upper printing layer of the label substrate can be provided with, for example, characters, figures, patterns, symbols, and other desired printing patterns by a gravure printing method, an offset printing method, a relief printing method, a screen printing method, an ink jet method, or the like. In addition, cosmetics can be further enhanced in combination with AL deposition. Further, a protective layer can be provided as a protection of the printed layer on the surface such as abrasion resistance and water resistance. It can be formed using printing ink suitable for the printing method.

  The lower printed layer of the label base material can be the same as the upper printed layer of the label base material, but the printing method takes into account the paper type of the label base material, anti-curling agent, sealant, etc. It can be formed using a printing ink suitable for the above.

As the protective layer on the upper side of the label substrate, vinyl chloride / vinyl acetate copolymer resin, chlorinated rubber, chlorinated polypropylene resin, acrylic resin, polyamide resin, glass cotton resin (nitrocellulose), urethane resin, etc. are used. be able to. Using these resins as the main components of the vehicle, a coating solution is prepared, and a protective layer is formed by gravure coating, roll coating, knife coating or the like. The coating amount is 0.5 g / m ^{2 to} 1.5 g / m ² (dry).

  As the anti-curl agent used in the present invention, a polyvinyl alcohol-based resin can be used. When the label is curled, it is difficult to apply the adhesive and the number of defective products increases. Moreover, an adhesive agent adheres to a coating machine, and it becomes a big problem, such as stopping a machine and cleaning. Therefore, an anti-curl agent is required.

As a method for applying the anti-curl agent, gravure printing, roll coating, knife coating, offset, or the like can be used. The coating amount is 0.5 g / m ^{2 to} 2.0 g / m ² (dry).

  As the sealing agent used in the present invention, cellulose resin, nitrified cotton (nitrocellulose), cellulose acetate, urethane resin, polyester polyol urethane resin, polyether polyol urethane resin, vinyl chloride resin, vinyl chloride A vinyl acetate copolymer resin, a vinyl chloride resin and its copolymer resin, a polyvinylidene chloride resin, and an amide resin can be used alone or in combination, such as a polymerized fatty acid polyamide resin. Polyhexamethylene adipate resin, polyacrylate resin, polymethacrylate resin and the like can also be used. A label base material and printing ink can be taken into consideration and can be selected as appropriate. A coating solution is prepared using these resins as the main components of the vehicle. Further, it is preferable to add 0.1% to 1% by weight of a slip agent (silicon-based or wax-based) to the coating solution made of the selected resin.

As a method for applying the sealant, gravure coating, roll coating, knife coating, die coating, screen coating and the like can be used. The coating amount is 2 g / m ^{2 to} 5 / m ² (dry). Since the sealing layer prevents penetration of the adhesive into the label base material and the printing layer, the uniformity of the coating film is required. The coating method may be determined in consideration of the physical properties of the coating solution for the sealant.

  Adhesives to be attached to glass bottles include α-starch as starch adhesive, ethylene vinyl acetate copolymer, EVA / acrylic acid graft resin as EVA adhesive, vinyl acetate resin, chloride as vinyl acetate adhesive Vinyl / vinyl acetate copolymer resin, polyacrylamide and its copolymer as acrylic adhesive, polycyanoacrylate resin, hot melt resin as ethylene / vinyl acetate copolymer resin, ethylene / acrylic ester copolymer resin, Etc. can be used. What is necessary is just to determine suitably from the quality requested | required of a label.

As a method of applying the adhesive, in order to apply a label-shaped one, it can be applied using gravure coating, roll coating, knife coating, die coating, screen coating, or the like. The coating amount is 2 g / m ^{2 to} 20 g / m ² (dry). What is necessary is just to determine suitably with the adhesive strength of an adhesive agent and a glass bottle.

  The label of the present invention can be peeled off from the glass bottle by hand at the interface between the sealing layer and the adhesive layer. The sealing layer and the adhesive layer are further improved in peelability by using a combination of resins having no affinity or low affinity for each other.

  The label of the present invention is one in which a printing layer is provided on the lower side of a label substrate made of a paper-based material. The printed information can be read by manually removing the label using the label. Information media by printing will spread, and it can be used in various ways for advertisements, precautions, campaign notifications, and gift application.

  Specific examples of the present invention will be described below.

Coated paper having a basis weight of 60 g / m ² was used as a label substrate. On the coated surface, which is the upper side of this coated paper, a pattern is printed by gravure printing using a printing ink whose main component is a polyamide resin, and vinyl chloride / vinyl acetate copolymer resin is printed on the printed surface of the vehicle. As a main component, a protective layer was provided by gravure coating the coating solution. The coating amount was 1 g / m ² .

Next, under the coated paper, gravure coating was performed using a coating solution containing polyvinyl alcohol resin as a main component of the vehicle, and an anti-curling agent having a coating amount of 0.9 g / m ² (dry) was provided.

  Next, on the surface of the anti-curl layer, characters were printed by gravure printing using a printing ink containing a polyamide resin as a main component of the vehicle to provide a printing layer.

Next, gravure coating was performed on the surface of the printed layer using a coating solution containing the following resin as a main component of the vehicle to provide a sealing layer having a coating amount of 2 g / m ² (dry).
(1) Blend of nitrified cotton-based resin and urethane-based resin {P1264 sealing varnish Toyo Ink Manufacturing Co., Ltd.}
・ Vinyl chloride / vinyl acetate copolymer resin {MF UNINT Toyo Ink Manufacturing Co., Ltd.}
・ Urethane resin {N527LPGT Medium Toyo Ink Manufacturing Co., Ltd.}
・ Blend of nitrified cotton-based resin and polyamide-based resin {PANNECO MEDIUM Toyo Ink Mfg. Co., Ltd.}
(5) A slip agent (silicon-based) is added to a blend of nitrified cotton-based resin and polyamide-based resin {PANNECO MEDIUM manufactured by Toyo Ink Co., Ltd.} by 0.3% by weight.

Next, roll coating was performed on the surface of the sealing layer using a coating solution containing vinyl chloride / vinyl acetate copolymer resin as a main component of the vehicle, and an adhesive layer having a coating amount of 10 g / m ² (dry) was provided. Labels (1) to (5) were prepared as evaluation samples. Tokiwanol Z-22H {manufactured by Tokiwa Chemical Co., Ltd.} was used as the adhesive.

  The label coated with the adhesive was directly attached to a glass bottle manufactured by Yamamura Glass Co., Ltd. to obtain a glass bottle with the label attached. Samples for evaluation (1) to (5) were obtained.

<Comparative example>
As a comparative example, a sample prepared in the same manner as in the example and without a sealing layer was prepared and used as a comparative sample.

An evaluation sample was prepared in the same manner as in Example 1. Among them, the resin of (1) to (5) was used in the same manner as in Example 1 to form a sealing layer having a coating amount of 4 g / m ² (dry).

  As a condition for removing the label attached to the glass bottle, after labeling, the label was removed by hand after storing it in a refrigerator at 5 ° C. for 48 hours. The N number of evaluation is 4.

Five-stage evaluation was performed as evaluation of a peeling state.
5: No paper breakage 4: Paper breakage (area less than 10% of the total)
3: There is material breakage of the paper (area of 10% or more and less than 30)
2: There is material breakage of paper (area of 30% or more and less than 50% of the total)
1: There is material breakage of paper (more than 50% of the total area)

実施例１の評価結果である。 <Comparison result 1>

It is an evaluation result of Example 1.

実施例２の評価結果である。 <Comparison result 2>

It is an evaluation result of Example 2.

As shown in Table 1, when the coating layer was applied at a coating amount of 2 g / m ² , the material using the vinyl chloride / vinyl acetate copolymer resin and the urethane-based resin was confirmed to have a slight breakage of the label base material. Was not seen. As for other resins, no material breakage of the base material was observed. Moreover, when the sealing layer shown in Table 2 was applied at a coating amount of 4 g / m ² , none of the resins was damaged in the label base material, and the printed layer was not taken out so that characters could be read. Further, in the configuration without the sealing layer, the material of the label base material was severely broken and the printed characters could not be read.

  The label of the present invention can be used for plastic bottles such as glass bottles and PET bottles, metal cans and the like.

1: Label 10: Label base material 11: Anti-curl layer 12: Print layer on the upper side of the label base material 13: Print layer on the lower side of the label base material 14: Sealing layer 15: Adhesive layer 16: Protective layer 17: Glass bottle 18: Label after peeling 19: Printing information 20: Residual adhesive layer

Claims (4)

  A label that is attached to a bottle surface in a peelable manner, wherein a printed layer, a sealing layer that covers a printed layer on the lower surface, and an adhesive layer are sequentially laminated on the upper and lower sides of the label base material.   The label according to claim 1, wherein an anti-curl layer that prevents curling of the label is laminated between the label substrate and the printing layer, or between the printing layer and the sealing layer.   The said sealing layer is made of at least a cellulose resin, a urethane resin, a vinyl chloride-vinyl acetate copolymer resin, a single amide resin, or a combination of two or more of these resins. 3. The label according to item 1 or 2.   The label according to any one of claims 1 to 3, wherein the label substrate is made of a paper-based material.

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