JP2007171642A - Peelable label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a label which does easily peel off a bottle when the bottle is circulated or used, is free of interlayer peeling of paper after being used and never partially left on the bottle, and can easily be peeled by a hand. <P>SOLUTION: Disclosed is the label which has at least a paper layer 10 and is rectangular. A sealing layer 13 is formed on the reverse surface of the paper layer, and a label front end part 14 and a rear end part 15 on the sealing layer are coated with adhesives; and the label is wound around an outer periphery of a bottle body and joined to a bottle surface, and after the rear end part is superposed on and joined to the surface of the front end part, the sealing layer and adhesives can be peeled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a label used for a bottle such as a glass bottle or plastic, and more particularly to a peelable label that can be easily peeled off after use.

  Conventionally, a printed label is attached to the surface of a bottle such as a glass bottle, a can, or a plastic as one of methods for appealing the contents of a product to consumers. As the material of the label, paper, various plastic films, and a structure in which they are laminated are used. In addition, there are various label mounting methods, but typical ones using plastic films include cylindrical heat-shrinkable polyester, polystyrene, and other plastic labels mounted on plastic bottles and glass bottles such as PET bottles, There are known a shrink label method in which heat shrinks and a stretch label method in which a plastic label such as a tubular elastic polyethylene is stretched and attached. On the other hand, paper labels have also been used in the past, and the paper label mounting method includes (1) a method in which an adhesive is pre-applied to the back side of the label at the time of label manufacture and is applied with pressure (hereinafter referred to as an adhesive method). (2) A method in which a heat-sensitive adhesive is applied to the back side of the label in advance, and the label is heated to develop adhesiveness (hereinafter referred to as a delayed tack method). (3) Immediately before being applied to the bottle There is a method in which an adhesive is applied to the back surface of the label and then applied with pressure (hereinafter referred to as an adhesive method). Depending on the application and purpose, the adhesive method is widely used because of its economical efficiency and low running cost.

  On the other hand, with the recent increase in environmental problems, the volume reduction of garbage and the recycling by separation and collection are promoted, and the need for a label that can be easily peeled off from the bottle is increasing. For plastic bottles such as the above, after the contents are consumed, it is necessary for the consumer to peel off the label by hand and separate it from the plastic bottle, or at the bottle recycling center, the label must be easily peeled off when the bottle is crushed. It is. In collecting glass bottles, the number of local governments instructing consumers to remove labels after they have peeled off labels is increasing. For example, shrink labels used for plastic bottles such as plastic bottles are perforated for easy separation by consumers, or made of a material that has a specific gravity difference from plastic bottles so that they can be easily separated at a bottle recycling center. For example, the label has been devised.

On the other hand, for paper labels, beer bottle labels have been known for a long time as adhesive labels. Further, a delayed tack type beer bottle label is disclosed (see Patent Document 1). However, the adhesive method and the delayed tack method disclosed in Patent Document 1 are methods suitable for large-scale processing of peeling with an alkaline cleaning liquid, and there is a problem that it is troublesome for consumers and difficult to apply. Therefore, adhesive type adhesives have been researched, and adhesives that are easy to peel off have been developed, and by using this adhesive, it has become easy to peel off from the bottle. In the label where the adhesive is applied to the front end portion and the rear end portion of the label, wound around the outer periphery of the bottle body, and the rear end portion is superimposed on the surface of the front end portion and joined, the rear end portion There is a problem in that delamination of the paper occurs when the front end portion is peeled off from the overlapping portion, and a part of the label remains in the packaging bottle.
JP-A-8-76689

  Therefore, the present invention has been made in view of the above problems, and cannot be easily peeled off from the bottle when the bottle is distributed or used, and there is no delamination of the paper after use, and the label on the packaging bottle is not. An object is to provide a label that can be easily peeled off by hand or the like without leaving any part.

  In order to achieve the above object, the label of the invention according to claim 1 is a rectangular label having at least a paper layer, and a sealing layer is formed on the back surface of the paper layer. Adhesive is applied to the front and rear end portions of the label on the sealing layer, wound around the outer periphery of the bottle body, joined to the bottle surface, and the rear end portion is superimposed on the front end portion surface. After the joining, the sealing layer and the adhesive can be peeled off.

  According to a second aspect of the present invention, in the label of the first aspect, the sealing layer is formed on the front end portion and the rear end portion.

  The invention according to claim 3 is the label according to claim 1 or 2, wherein the peel strength between the sealing layer and the adhesive is 0.5 to 1.5 N / 15 mm width. Is.

  In the label of the present invention, the sealing layer is formed on the back surface of the paper layer, and even when the rear end portion of the label is overlapped and joined to the surface of the front end portion, when separating the bottle and the label, It can be easily peeled by hand, and the peel strength between the sealing layer and the adhesive is 0.5 to 1.5 N / 15 mm width as described in claim 3, and the delamination of the paper is In addition, a part of the label does not remain on the bottle, and it can be peeled cleanly and separated from the bottle.

  Since the sealing layer is formed on the front end portion and the rear end portion of the label, the label according to the present invention has a structure in which when the label is peeled off from the bottle, the overlapping portion with the front end portion surface of the rear end portion is overlapped. At the time of peeling, the sealing layer and the adhesive are peeled off, and there is no delamination of the paper, and the label can be peeled off.

  Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of a label according to the present invention. FIG. 2 is a front view of a labeled bottle in which a label showing an embodiment of the present invention is wound around and attached to a bottle. 3 is an enlarged sectional view taken along line XX in FIG. FIG. 4 is a front view showing a method of peeling the label of FIG. FIG. 5 is a sectional view showing another embodiment of the label according to the present invention.

As shown in FIG. 1, in the label 1 of the present invention, a printing ink layer 11 and an overprint varnish layer 12 are sequentially formed on the surface of a paper substrate 10, and a sealing layer 13 is formed on the back surface of the paper substrate 10. Is formed. As the paper base material 10, fine paper, kraft paper, imitation paper, coated paper or the like can be used, and the basis weight is 40 to 100 g / m ^2. The degree is preferred. In order to incentivize consumer purchases and differentiate products, the paper substrate 10 is made of aluminum vapor-deposited paper, aluminum foil-laminated paper, plastic films such as polyester and polypropylene, or aluminum vapor-deposited on these plastic films. You may use the paper which bonded the made film, or the paper which bonded the pearl film or the iris color film.

  The printing ink layer 11 is formed by printing design and display items by a known gravure ink, offset ink, silk screen ink, or the like by a printing method such as gravure printing, offset printing, or silk screen printing. The overprint varnish layer 12 is formed to protect the surface of the printing ink layer 11 and the paper base material, and is a general overcoat mixed with additives for imparting friction resistance, scratch resistance, slipperiness, and the like. It is provided by the above printing method using a print varnish.

  The sealing layer 13 includes, as a resin, acrylic resin, vinyl chloride / vinyl acetate copolymer resin, nitrified cotton, cellulose resin, polyamide resin, urethane resin, polyester resin, EVA resin, chlorinated PP resin, chlorinated EVA resin, Cyclized rubber resins, rosin-modified maleic resins, petroleum resins, chlorinated rubber resins, butyral resins, vinyl chloride / acrylic copolymer resins, shellac, alkyd resins, and the like can be used. Moreover, you may mix and mix the said resin. It is preferable to mix 5 to 20 parts by weight of silicon with respect to 100 parts by weight of these resins, and more preferably 5 to 15 parts by weight. Particularly preferred is 8 to 12 parts by weight. Even if the label of the present invention is wound around a bottle by mixing silicon and the rear end portion is overlapped with the surface of the front end portion of the label and bonded with an adhesive, the label is peeled off from the bonded portion. Paper can be peeled cleanly without delamination. Moreover, if the amount of silicon mixed is determined so that the peel strength of the label between the adhesive and the sealing layer 13 is 0.5 to 3.0 N / 15 mm width depending on the type of adhesive used for label bonding. Good. The peel strength of the label is preferably 0.5 to 3.0 N / 15 mm width, more preferably 0.5 to 1.5 N / 15 mm width. When the width is less than 0.5 N / 15 mm, the label may be peeled off due to an impact caused by vibration during transportation of goods or an external force during handling. If the width exceeds 3.0 N / 15 mm, delamination of the paper may occur.

  Next, a method for winding the label of the present invention around the outer periphery of the body of the bottle 2 will be described with reference to FIGS. For the label 1, the adhesive 3 is applied on the sealing layer 13 at the front end portion 14 and the rear end portion 15 of the label 1 immediately before being attached to the bottle. First, the adhesive 3 at the front end portion 14 is applied to the body of the bottle 2. While the label 1 is wound around the outer periphery of the body portion, the rear end portion 15 is superposed on the overprint varnish layer 12 on the surface of the front end portion 14 and pressed to join, thereby completing the bottle 4 with label. Note that the overprint varnish layer 12 at the front end portion 14 on which the adhesive 3 applied to the rear end portion 15 is overlaid may be omitted.

  Adhesive 3 is a water-based type using a resin such as poval, an aqueous emulsion type using a resin such as acrylic or ethylene / vinyl acetate copolymer, or a hot melt type using an olefin-based or rubber-based resin. it can. The adhesive 3 may be partially applied in addition to the leading end portion 14 and the trailing end portion 15 of the label 1, but it is preferable that the coating portion is small in order to easily peel off the used label 1. Further, an unapplied portion of the adhesive 3 may be provided at the peripheral portion of the rear end portion 15, or an unapplied portion of the adhesive 3 may be provided in a notch shape at one corner of the rear end portion 15. By doing so, the label 1 becomes easier to peel off.

  Next, a method for peeling the label 1 of the labeled bottle 4 will be described with reference to FIG. After use, the consumer peels off one corner of the rear end portion 15 with a nail in the overlapped portion of the label 1, peels off the overlapped portion toward the other corner using the peeled portion as a gripping piece, The tip portion 14 is unwound and the bottle 2 and the label 1 are separated. Thus, the peel strength between the sealing layer 13 and the adhesive 3 is 0.5 to 1.5 N / 15 mm width, there is no delamination of paper, and there is no part of the label remaining on the bottle. The label 1 can be peeled off from the mating portion.

  Next, another embodiment will be described with reference to FIG. As shown in FIG. 5, in the label 1 ′ of the present invention, a printing ink layer 21 and an overprint varnish layer 22 are sequentially formed on the surface of the paper substrate 20, and a sealing layer is formed on the back surface of the paper substrate 20. 23 is formed. The sealing layer 23 is formed in a band shape having a width wider than that of the overlapping portion, partially along the edge at the leading end portion 24 and the trailing end portion 25 of the label 1 ′. Further, the paper base surface other than the sealing layer 23 of the paper base 20 may be provided with an anti-curl coat with a mixed liquid mainly composed of water / alcohol. By adopting such a configuration, curling of the label 1 'can be prevented, the suitability of the labeling machine can be improved, and the material used for the sealing layer can be reduced. Others are the same as those of the embodiment of the present invention, and a description thereof will be omitted.

  The present invention will be described in more detail with reference to the following examples.

A laminate in which an aluminum vapor-deposited surface of an aluminum vapor-deposited polyethylene terephthalate film 12 μm and a high quality 52.3 g / m ² were bonded together by a known dry lamination method using a two-component reactive polyurethane adhesive was prepared. After that, using an 8 color gravure printing machine on the polyethylene terephthalate surface of the 12 μm aluminum vapor-deposited polyethylene terephthalate film, using the laminated body cured for 2 days in an atmosphere of 30 ° C. and cured with an adhesive. 6 units of a predetermined design are printed in 1 to 6 units, overprint varnish is printed on the 7th unit, and 100 parts by weight of nitrified cotton / polyamide resin on the quality surface in the final 8th unit As shown in Table 1, 6 to 18 parts by weight of silicon is mixed in each level, and a sealing solution diluted with a mixed solvent of toluene / ethyl acetate / isopropyl alcohol is coated on the entire surface to form a sealing layer. Thus, three types of windings of the label 1 having different silicon mixing ratios were produced.

  In the same manner as in Example 1, the label 1 ′ was mixed with a sealing solution prepared by mixing 10 parts by weight of silicon with 100 parts by weight of a nitrified cotton / polyamide resin and diluting with a mixed solvent of toluene / ethyl acetate / isopropyl alcohol. A winding was made. However, the sealing layer 23 was formed by pattern coating the leading end portion 24 and the trailing end portion 25 of the label in registration with the printing ink layer 21.

[Comparative Example 1]
As in Example 1, an 8-color gravure printing machine is used to print a predetermined design in 6 colors from 1 unit to 6 units, an overprint varnish is printed on the 7th unit, and a label without a sealing layer A winding was prepared.

[Comparative Example 2]
As shown in Table 1, 0 parts by weight and 22 parts by weight of silicon are mixed with 100 parts by weight of nitrified cotton / polyamide resin and diluted with a mixed solvent of toluene / ethyl acetate / isopropyl alcohol. In the same manner as in Example 1, two types of windings of label 1 were produced.

Label winding produced in Example 1, Example 2, Comparative Example 1 and Comparative Example 2 was slit to a predetermined dimension to produce a continuous winding of labels in one row, and the following experiment was performed.
(Experiment 1)
Each winding produced in Example 1, Example 2, Comparative Example 1 and Comparative Example 2 was starched at a rate of 200 bottles / minute using a label machine (SBHE300-310SB type labeler, manufactured by Sugaya Kogyo Co., Ltd.). A system-based aqueous adhesive (Tokiwanol, manufactured by Tokiwa Chemical Co., Ltd.) was applied to the sealing layer surface of the label and attached to a glass bottle to produce a bottle 4 with a label. Then, after leaving for 24 hours in an atmosphere of 20 ° C., a peelable sensory evaluation was performed on the label performance. The results are shown in Table 1. In addition, there was no delamination of the paper, and the peelable one was marked with ◯, and the delamination of paper or a part of the paper remaining in the glass bottle was marked with x.

(Experiment 2)
Next, the peel strength of the label was measured and the peeled state was observed by the following method using each winding produced in Example 1, Example 2, Comparative Example 1 and Comparative Example 2.
<Preparation of Sample> Two labels cut to a predetermined size (30 mm × 200 mm) from each winding were used, and 5 of the adhesive used in Experiment 1 was applied to the sealing layer surface at the rear end portion of one label. -10 g / m ² · dry applied, overlapped with the adhesive-coated surface so that the overprint varnish surface of the other label's leading edge coincides, and pressure-bonded at 500 g / cm ² at room temperature (20 ° C.) Left for 24 hours.
<Measurement of Peel Strength> For the above samples, a test method according to JIS-Z0238 (Peel rate: 300 mm ± 20 mm / min) using a tensile tester (manufactured by Shimadzu Corporation, model: Autograph S-300). , Peeling angle: 90 degrees).
<Peeling state> When measuring the peel strength, the peel state of the sample was observed, and there was no delamination of the paper, and it could be peeled cleanly, with a peel strength of 0.5 to 1.5 N / 15 mm width, ○, delamination of the paper Or, some of the paper breaks were ×, and the paper was peeled cleanly without delamination, but the peel strength was less than 0.5 N / 15 mm width Δ, and the paper was peeled without delamination However, the case where the peel strength exceeds 1.5 N / mm width is marked with ▽.

  From the results shown in Table 1, even if the label is manually peeled off from the bottle with the label by forming a sealing layer on the paper layer of the label as in Example 1, Example 2, and Comparative Example 2, the paper There was no peeling between layers, and peeling was possible. In Comparative Example 1 in which the sealing layer was not formed, delamination of the paper occurred, and a part of the paper remained in the glass bottle. The peel strength of Examples 1 and 2 was as high as 0.6 to 1.4 N / 15 mm width. On the other hand, in Comparative Example 2, when silicon was not mixed with the filling liquid, peeling was possible, but there was a tendency that the strength was strong and the peeling was difficult. Furthermore, the label using the sealing liquid in which 22 parts by weight of the silicon of Comparative Example 2 was mixed had a weak peeling strength and could be easily peeled off. However, when the impact due to vibration during transportation or an external force in handling was applied, the label peeling was predicted. It was to be done.

It is sectional drawing which shows one Embodiment of the label concerning this invention. It is a front view of a bottle with a label in which a label showing one embodiment of the present invention is wound around and attached to a bottle. FIG. 3 is an enlarged sectional view taken along line XX in FIG. 2. It is a front view which shows the peeling method of the label of FIG. It is sectional drawing which shows other embodiment of the label concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 'label 2 Bottle 3 Adhesive 4 Labeled bottle 10, 20 Paper base material 11, 21 Printing ink layer 12, 22 Overprint varnish layer 13, 23 Sealing layer 14, 24 Front end part 15, 25 Rear end part

Claims (3)

A rectangular label having at least a paper layer, wherein a sealing layer is formed on the back surface of the paper layer, and an adhesive is applied to a leading end portion and a rear end portion of the label on the sealing layer. The sealing layer and the adhesive can be peeled off after being wound around the outer periphery of the body and bonded to the bottle surface, and the rear end portion is overlapped and bonded to the surface of the tip portion. Peelable label. The peelable label according to claim 1, wherein the sealing layer is formed on the front end portion and the rear end portion. The peelable label according to claim 1 or 2, wherein the peel strength between the sealing layer and the adhesive is 0.5 to 1.5 N / 15 mm width.

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