Re-peeling adhesive label and package

Abstract

To provide a re-peeling adhesive label which has re-peelability, and can be stuck even to a surface of a condensed adherend at low temperature.SOLUTION: A re-peeling adhesive label for re-sealing a package of a refrigeration article or a frozen article includes a base material, and an adhesive layer on at least one surface of the base material, wherein the adhesive layer is composed of a rubbery adhesive, as for adhesive force, when adhesive force after 30 minutes after bonding to a polyethylene plate under 5°C environment is represented by A, and adhesive force after 30 minutes after bonding to a condensed polyethylene plate is represented by B, both A and B are 3 N / 25 mm or more and 10 N / 25 mm or less, and B / A is 0.7 or more and 1.1 or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a removable adhesive label and a package. [Background technology]

[0002] Recently, some food packages have been fitted with resealable adhesive tape, which uses a re-peelable solvent-based acrylic adhesive, emulsion-based acrylic adhesive, or hot-melt-based adhesive. For example, Patent Document 1 discloses a pressure-sensitive adhesive and a pressure-sensitive adhesive sheet that have both excellent adhesion and removability even in low-temperature environments, the pressure-sensitive adhesive being an emulsion-type pressure-sensitive adhesive whose main constituent is an acrylic copolymer having a (meth)acrylic acid alkyl ester as a monomer component, and which is characterized by containing a rubber-based pressure-sensitive adhesive component that is incompatible with the acrylic copolymer, and a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer made of the pressure-sensitive adhesive. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-163095 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when used for packaging bags for refrigerated or frozen goods, there are problems in that the adhesive strength of the adhesive tape decreases at low temperatures, and in that, after opening, condensation forms on the surface of the package, making it difficult for the adhesive tape to adhere to the package. On the other hand, strong adhesive labels have the problem of poor resealability because their adhesive strength is too strong, making them difficult to peel off and leaving adhesive residue. The present invention has been made in view of the above circumstances, and aims to provide a removable adhesive label that is removable and can be attached to the surface of an adherend even at low temperatures or when condensation is present, and a package to which the removable adhesive label is attached. [Means for solving the problem]

[0005] The present invention is a removable adhesive label for resealing packages of refrigerated or frozen goods, the removable adhesive label comprising a substrate and an adhesive layer on at least one surface of the substrate, the adhesive layer comprising a rubber-based adhesive, and the adhesive strength of the adhesive layer, where A is the adhesive strength 30 minutes after attachment to a polyethylene plate in a 5°C environment and B is the adhesive strength 30 minutes after attachment to a polyethylene plate that has condensation on it, both A and B are 3 N / 25 mm or more and 10 N / 25 mm or less, and the adhesive strength ratio B / A is 0.7 or more and 1.1 or less.

[0006] The rubber-based adhesive preferably contains an elastomer, a tackifier, a plasticizer, and an antioxidant.

[0007] The elastomer is a block copolymer having a polymer block made of a styrene-based monomer and a polymer block made of a conjugated diene-based monomer, or a styrene-based thermoplastic elastomer obtained by hydrogenating a block copolymer; the content of the elastomer in the rubber-based pressure-sensitive adhesive is preferably 20% by mass or more and 50% by mass or less; the tackifier is at least one selected from rosin-based resins, terpene-based resins, styrene-based resins, C5 petroleum resins, C5 / C9 petroleum resins, and hydrogenated petroleum resins; the content of the tackifier in the rubber-based pressure-sensitive adhesive is preferably 30% by mass or more and 60% by mass or less; the plasticizer is at least one selected from paraffin-based oils, naphthenic oils, natural oils, liquid isoprene, liquid butene, and waxes; and the content of the plasticizer in the rubber-based pressure-sensitive adhesive is preferably 20% by mass or more and 50% by mass or less.

[0008] The elastomer is preferably at least one selected from a styrene-isoprene-styrene triblock copolymer, a styrene-butadiene-styrene copolymer, a styrene-butadiene rubber, a styrene-isoprene diblock copolymer, and a styrene-butadiene diblock copolymer.

[0009] Another aspect of the present invention is a package for refrigerated or frozen goods to which the above-mentioned removable adhesive label of the present invention is removably attached. [Effects of the Invention]

[0010] According to the present invention, it is possible to obtain a removable adhesive label that is removable and can be attached to the surface of an adherend even at low temperatures or when condensation is present, and a package having the removable adhesive label attached thereto. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view of a removable adhesive label according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] [Removable adhesive label] The removable adhesive label 10 of this embodiment is used to reseal packaging for refrigerated or frozen goods, and the removable adhesive label 10 comprises a base material 11 and an adhesive layer 12 on at least one surface of the base material 11. Each component will be described below.

[0013] <Base material> The substrate 11 may or may not have flexibility, but it is preferable that the substrate 11 has flexibility, which improves the workability of attaching the removable adhesive label 10 to an adherend.

[0014] The constituent material of the substrate 11 is not particularly limited, and examples thereof include resin materials, metal materials, and plant fibers such as pulp. Among these, resin materials are preferred, and films made of resin materials are particularly preferred. This allows for the production of a substrate 11 that is easy to work with and has excellent water resistance.

[0015] Examples of resin materials constituting the substrate 11 include polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymers; polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate; acetate resin, acrylonitrile-butadiene-styrene copolymer (ABS) resin, polystyrene, polyvinyl chloride, polyamide, polyesteramide, polyetherimide, polyetheretherketone, polyarylate, polyimide, polyamideimide, poly-p-phenylene sulfide, and polyetherester. These may be used alone or in combination of two or more as the resin material constituting the substrate 11. Among these, polyolefins such as polyethylene and polypropylene are preferred as the resin material constituting the substrate 11. By using such a resin, the strength of the removable adhesive label 10 can be improved, and the workability for attaching the removable adhesive label 10 to the adherend can be further improved. In addition, the removable adhesive label 10 can be easily wound into a roll.

[0016] The substrate 11 may also contain components other than the above-mentioned constituent materials. Examples of such components include colorants such as dyes and pigments, antioxidants such as anilides and phenols, ultraviolet absorbers such as benzophenones and benzotriazoles, light stabilizers, modifiers, rust inhibitors, fillers, surface lubricants, corrosion inhibitors, heat stabilizers, lubricants, antistatic agents, polymerization inhibitors, crosslinking agents, catalysts, plasticizers, leveling agents, thickeners, softeners, dispersants, and the like.

[0017] The substrate 11 may be a single layer or a laminate including multiple layers. The substrate 11 may be made of a gradient material whose composition changes gradually in the thickness direction, for example.

[0018] The thickness of the substrate 11 is not particularly limited, but is preferably 15 μm or more and 300 μm or less, and more preferably 30 μm or more and 100 μm or less. A substrate 11 having a thickness within the above range is easy to handle and easy to visually inspect. Therefore, the removable adhesive label 10 can be easily attached to an adherend, and the state of attachment of the removable adhesive label 10 can be easily visually inspected.

[0019] The substrate 11 may be substantially transparent or opaque.

[0020] <Adhesive layer> The adhesive layer 12 is made of a rubber-based adhesive, and the adhesive strength of the adhesive layer 12 is such that, when the adhesive strength after 30 minutes of application to a polyethylene plate in a 5°C environment is defined as A and the adhesive strength after 30 minutes of application to a polyethylene plate on which condensation has occurred is defined as B, both A and B are between 3 N / 25 mm and 10 N / 25 mm, and the adhesive strength ratio B / A is between 0.7 and 1.1. Hereinafter, when adhesive strength A and B are 3 N / 25 mm or more, the label can be used without peeling, and when they are 10 N / 25 mm or less, the label can be easily peeled off by hand. An adhesive strength ratio B / A of 0.7 or more and 1.1 or less suggests that condensation has little effect on adhesion. The adhesive strength ratio B / A is preferably 0.8 or more and 1.0 or less. The adhesive strength is a value measured in accordance with JIS Z 0237:2022. Furthermore, the term "condensed polyethylene plate" refers to a polyethylene plate with a thickness of 2 mm that has been left standing in an environment at 5°C and has had water sprayed onto its surface using a spray bottle.

[0021] (rubber adhesive) The rubber-based adhesive that imparts the above-mentioned adhesive strength contains an elastomer, a tackifier, a plasticizer, and an antioxidant. Each component will be described below.

[0022] -Elastomer- The elastomer is preferably a block copolymer having a polymer block made of a styrene-based monomer and a polymer block made of a conjugated diene-based monomer. The content of the elastomer in the rubber-based pressure-sensitive adhesive is preferably 20% by mass or more and 50% by mass or less, which allows the pressure-sensitive adhesive to achieve a sufficient balance between cohesive strength and adhesiveness.

[0023] Specific examples of conjugated diene monomers include 1,3-butadiene, isoprene, chloroprene, 2,3-dimethylbutadiene, 1,3-pentadiene, and 1,3-hexadiene. The conjugated diene monomers may be used alone or in combination of two or more. Among these, butadiene and isoprene are preferred.

[0024] The styrene content in the elastomer is not particularly limited as long as it is 35% by mass or less, but from the viewpoint of the low-temperature properties of the resulting adhesive layer 12, it is preferably 12% by mass or more and 25% by mass or less, more preferably 12% by mass or more and 20% by mass or less, and even more preferably 13% by mass or more and 18% by mass or less.

[0025] When the styrene content in the elastomer is 35% by mass or less, it is possible to form an adhesive layer 12 with sufficiently improved low-temperature properties. Furthermore, when the styrene content in the elastomer is 12% by mass or more, sufficient cohesive strength is obtained.

[0026] The conjugated diene content in the elastomer is not particularly limited, but from the viewpoint of the low-temperature properties of the resulting adhesive layer 12, it is preferably 65% ​​by mass or more and 88% by mass or less, more preferably 75% by mass or more and 88% by mass or less, and even more preferably 80% by mass or more and 87% by mass or less.

[0027] When the conjugated diene content in the elastomer is 65% by mass or more, it is possible to form an adhesive layer 12 with more sufficiently improved low-temperature properties. Furthermore, when the conjugated diene content in the elastomer is 88% by mass or less, sufficient cohesive strength is obtained.

[0028] The block copolymer preferably contains at least a styrene-isoprene diblock copolymer or a styrene-butadiene diblock copolymer, and further contains, as necessary, a triblock copolymer, a radial copolymer, or the like. In the triblock copolymer or the radial copolymer, it is more preferable that the styrene block is disposed at the end of the polymer chain. The styrene blocks disposed at the end of the polymer chain tend to gather together to form domains, which forms a physical crosslinked structure and improves the cohesion of the PSA.

[0029] From the viewpoint of the low-temperature properties of the resulting adhesive layer 12, the content of styrene-isoprene diblock copolymer or styrene-butadiene diblock copolymer in the elastomer is preferably 30% by mass or more, more preferably 30% by mass or more and 80% by mass or less, even more preferably 50% by mass or more and 80% by mass or less, and particularly preferably 60% by mass or more and 80% by mass or less.

[0030] When the content of the styrene-isoprene diblock copolymer or the styrene-butadiene diblock copolymer in the elastomer is 30% by mass or more, it is possible to form an adhesive layer 12 with sufficiently improved low-temperature properties. Furthermore, when the content of the styrene-isoprene diblock copolymer or the styrene-butadiene diblock copolymer in the elastomer is 80% by mass or less, sufficient cohesive strength is obtained.

[0031] More specifically, examples of block copolymers include styrene-isoprene block (SI) copolymers such as styrene-isoprene-styrene copolymer (SIS); styrene-butadiene block copolymers such as styrene-butadiene copolymer (SB) such as styrene-butadiene rubber (SBR), styrene-butadiene-styrene copolymer (SBS), and styrene-butadiene-styrene-butadiene copolymer (SBSB); styrene-isobutylene-styrene block copolymer (SIBS); styrene-ethylene / butylene-styrene (SEBS); styrene-ethylene / propylene-styrene (SEPS); and styrene-ethylene-ethylene / propylene-styrene (SEEPS). Among these, at least one selected from styrene-isoprene-styrene triblock copolymer, styrene-butadiene-styrene (SBS) copolymer, styrene-butadiene rubber, styrene-isoprene diblock copolymer, and styrene-butadiene diblock copolymer is preferred. The block copolymers can be used alone or in combination of two or more.

[0032] -Tackifier- The tackifier is preferably at least one selected from rosin-based resins, terpene-based resins, styrene-based resins, C5 petroleum resins, C5 / C9 petroleum resins, and hydrogenated petroleum resins.

[0033] Examples of the rosin-based resin include the following (i) to (iii). (i) Unmodified rosin (raw rosin) such as gum rosin, wood rosin, tall oil rosin, etc. (ii) Modified rosin obtained by modifying unmodified rosin through hydrogenation, disproportionation, polymerization, etc. (hydrogenated rosin, disproportionated rosin, polymerized rosin, other chemically modified rosin, etc.) (iii) Rosin esters such as those obtained by esterifying unmodified rosin with alcohols (rosin esters) and those obtained by esterifying modified rosin (hydrogenated rosin, disproportionated rosin, polymerized rosin, etc.) with alcohols (modified rosin esters); unsaturated fatty acid modified rosins obtained by modifying unmodified rosin or modified rosin (hydrogenated rosin, disproportionated rosin, polymerized rosin, etc.) with unsaturated fatty acids; unsaturated fatty acid modified rosin esters obtained by modifying rosin esters with unsaturated fatty acids; rosin alcohols obtained by reducing the carboxyl groups of unmodified rosin, modified rosin (hydrogenated rosin, disproportionated rosin, polymerized rosin, etc.), unsaturated fatty acid modified rosins, or unsaturated fatty acid modified rosin esters; metal salts of rosins (especially rosin esters) such as unmodified rosin, modified rosin, and various rosin derivatives; rosin phenolic resins obtained by adding phenol to rosins (unmodified rosin, modified rosin, various rosin derivatives, etc.) using an acid catalyst and then thermally polymerizing the resulting mixture. Among these, rosin esters are preferred. Specific examples of rosin esters include glycerin esters, pentaerythritol esters, methyl esters, ethyl esters, butyl esters, and ethylene glycol esters.

[0034] Examples of the terpene resin include terpene resins such as α-pinene polymers, β-pinene polymers, and dipentene polymers; modified terpene resins obtained by modifying (phenol-modified, styrene-modified, hydrogenated-modified, hydrocarbon-modified, etc.) the above-mentioned terpene resins, such as terpene phenol resins, styrene-modified terpene resins, and hydrogenated terpene resins; etc. The terpene resins may be used alone or in combination of two or more.

[0035] Examples of styrene-based resins include those containing a styrene homopolymer as the main component, those containing an α-methylstyrene homopolymer as the main component, those containing a vinyltoluene homopolymer as the main component, and those containing a copolymer containing two or more of styrene, α-methylstyrene, and vinyltoluene as the main component in the monomer composition, such as an α-methylstyrene / styrene copolymer resin containing an α-methylstyrene / styrene copolymer as the main component. The styrene-based resins can be used alone or in combination of two or more.

[0036] "C5 petroleum resin" refers to an aliphatic hydrocarbon resin. Examples of C5 petroleum resins include Quintone (registered trademark) B170 manufactured by Zeon Corporation.

[0037] "C5 / C9 petroleum resin" refers to a copolymer resin of an aliphatic hydrocarbon (C5) and an aromatic hydrocarbon (C9). Examples of C5 / C9 petroleum resins include Petrotac (registered trademark) 90 manufactured by Tosoh Corporation.

[0038] The content of the tackifier in the rubber-based pressure-sensitive adhesive is preferably 30% by mass or more and 60% by mass or less. A tackifier content of 30% by mass or more makes it possible to exhibit sufficient adhesiveness, and a tackifier content of 60% by mass or less makes it possible to exhibit low-temperature adhesive performance.

[0039] -Plasticizer- The plasticizer is not particularly limited, and conventionally known plasticizers can be used. For example, it is preferably at least one selected from paraffinic oil, naphthenic oil, natural oil, liquid isoprene, liquid butene, and wax. The content of the plasticizer in the rubber-based pressure-sensitive adhesive is preferably 20% by mass or less and 50% by mass or less. Examples of suitable plasticizers include petroleum-based process oils such as paraffinic process oil, naphthenic process oil, and aromatic process oil; natural oils such as castor oil and tall oil; dialkyl dibasics such as dibutyl phthalate, dioctyl phthalate, and dibutyl adipate; and low-molecular-weight liquid polymers such as liquid polybutene and liquid polyisoprene. Plasticizers may be used singly or in combination of two or more. Among these, naphthenic process oils are preferred from the viewpoint of improving the low-temperature properties of the resulting adhesive layer 12.

[0040] The rubber-based adhesive can be applied to the substrate 11 by various application methods such as a die coater, a roll coater, or a knife coater.

[0041] The thickness of the adhesive layer 12 is usually preferably 1 μm or more and 50 μm or less, and more preferably 5 μm or more and 30 μm or less.

[0042] (Other ingredients) If necessary, fillers, light stabilizers, antioxidants, colorants, antistatic agents, wetting agents, leveling agents, thickeners, antifoaming agents, preservatives, etc. may be appropriately added to the rubber-based pressure-sensitive adhesive.

[0043] <Other configurations> (Release liner) The removable adhesive label 10 of the present invention may be provided with a release liner on the adhesive layer 12 side. Examples of release liners include paper such as glassine paper, clay-coated paper, kraft paper, and fine paper; laminated paper obtained by laminating these papers with polyethylene resin or the like; and plastic films such as polyethylene terephthalate, polyethylene naphthalate, and polyolefin, to which a release agent such as silicone is applied in an amount of about 0.1 to 3 g / m2 in dry mass, and then cured by heat, ultraviolet light, or the like to form a release layer. The thickness of the release liner is not particularly limited as long as it is within a range that does not impair the effects of the present invention, but is preferably 25 μm or more and 200 μm or less.

[0044] (Primer layer) A primer layer may be provided between the substrate 11 and the adhesive layer 12. For example, a primer layer can be formed by applying a liquid composition containing a primer (a primer layer-forming composition) onto the substrate 11 by a gravure method, a Mayer bar method, or the like. After applying the primer layer-forming composition, treatments such as heating and drying may be carried out as necessary.

[0045] (adherent) The material of the adherend is preferably one that is excellent in heat resistance, moisture permeability, etc., and is preferably a polyolefin resin film such as polyethylene or polypropylene.

[0046] [Packaging] The packaging of the present invention is for refrigerated or frozen goods to which the above-mentioned removable adhesive label of the present invention is removably attached. Because the removable adhesive label of the present invention is removably attached, the removable label can be successfully attached even if condensation forms on the surface of the packaging when it is resealed. [Example]

[0047] The present invention will be described below with reference to examples, but the present invention is not limited to these examples.

[0048] [Example 1] A stainless steel container equipped with heating and stirring functions was charged with 2 parts by mass of a hindered phenol-based antioxidant (Irganox 565, manufactured by BASF, 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazin-2-ylamino)phenol), an elastomer (SIS, styrene content 14%, styrene-isoprene diblock content 78%), polymerized rosin, a terpene-based petroleum resin, and a naphthenic process oil (Nyflex 223, manufactured by NYNAS) as a plasticizer, and the mixture was stirred and melted while maintaining the temperature at 170°C to prepare a molten, homogeneous mixture, which was a hot-melt pressure-sensitive adhesive composition. Next, the prepared hot-melt adhesive composition was melt-coated onto a glassine paper release liner using a die coater to form an adhesive layer with a thickness of 16 μm. Next, an 80 μm thick synthetic paper substrate (Yupotack (registered trademark) base paper SGS80, manufactured by Yupo Corporation) was laminated onto the adhesive layer to prepare a removable adhesive label.

[0049] [Comparative Example 1] A water-dispersible pressure-sensitive adhesive composition was obtained by emulsion polymerization of 98.5 parts by mass of 2-ethylhexyl acrylate, 1.0 part by mass of methyl methacrylate, 0.5 parts by mass of acrylic acid, 0.5 parts by mass of polyoxyethylene-1-(allyloxymethyl) alkyl ether ammonium sulfate (a surfactant manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., product name: AQUALON KH-05), 0.5 parts by mass of polyoxyalkylene polycyclic phenyl ether sulfate ammonium salt (a surfactant manufactured by Nippon Nyukazai Co., Ltd., product name: NEWCOL 707-SF), and 100 parts by mass of purified water. To 100 parts by mass of the obtained water-dispersed PSA composition, 3.0 parts by mass of an emulsion-type tackifier (a rosin resin manufactured by Arakawa Chemical Industries, Ltd., product name: Superester E-730-55) and 0.4 parts by mass of a crosslinker (glycerol polyglycidyl ether manufactured by Nagase ChemteX Corporation, product name: Denacol EX-313 (active ingredient 99% or more)) were added to prepare a PSA composition. The obtained PSA composition was applied to a glassine paper release liner using a roll knife coater to a coating thickness of 16 μm after drying, and then dried at 90°C for 2 minutes to form a PSA layer. Next, an 80 μm thick synthetic paper substrate (Yupotack (registered trademark) base paper SGS80, manufactured by Yupo Corporation) was laminated onto the adhesive layer to prepare a removable adhesive label.

[0050] Comparative Example 2 A water-dispersible pressure-sensitive adhesive composition was obtained by emulsion polymerization of 98.5 parts by mass of 2-ethylhexyl acrylate, 0.5 parts by mass of methyl methacrylate, 1.0 part by mass of acrylic acid, 0.6 parts by mass of polyoxyethylene-1-(allyloxymethyl) alkyl ether ammonium sulfate (surfactant manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., product name: AQUALON KH-05), 0.5 parts by mass of polyoxyalkylene polycyclic phenyl ether sulfate ammonium salt (surfactant manufactured by Nippon Nyukazai Co., Ltd., product name: NEWCOL 707-SF), and 100 parts by mass of purified water. A removable adhesive label was produced in the same manner as in Comparative Example 1, except that an emulsion-based adhesive composition was prepared by adding 1.0 part by mass of acetyl tributyl citrate (manufactured by Asahi Kasei Finechem Co., Ltd.) as a plasticizer and 0.6 part by mass of a crosslinking agent (1.0 part of glycerol polyglycidyl ether, product name: Denacol EX-313 (active ingredient 99% or more) manufactured by Nagase ChemteX Corporation) to 100 parts by mass of the obtained water-dispersible adhesive composition.

[0051] [evaluation] The removable adhesive labels of the above Examples and Comparative Examples were evaluated as follows. The removable adhesive label was cut into a size of 25 mm wide x 280 mm long. It was attached to both the non-condensed and condensed sides of a polyethylene plate (2 mm thick) in a 5°C dry environment, and the adhesive strength was measured 30 minutes later. The measurement results are shown in Table 1. The condensed polyethylene plate was prepared by lightly spraying water onto the surface of a 2 mm thick polyethylene plate that had been left standing in a 5°C environment.

[0052] [Table 1]

Claims

1. A removable adhesive label for resealing a package of refrigerated or frozen goods, comprising: A substrate and an adhesive layer on at least one surface of the substrate are provided. The adhesive layer is made of a rubber-based adhesive, A removable adhesive label in which the adhesive strength of the adhesive layer is such that, when the adhesive strength after 30 minutes of being attached to a polyethylene plate in a 5°C environment is defined as A and the adhesive strength after 30 minutes of being attached to a polyethylene plate that has condensation on it is defined as B, both A and B are 3 N / 25 mm or more and 10 N / 25 mm or less, and the adhesive strength ratio B / A is 0.7 or more and 1.1 or less.

2. 2. The removable adhesive label according to claim 1, wherein the rubber-based adhesive contains an elastomer, a tackifier, a plasticizer, and an antioxidant.

3. the elastomer is a block copolymer having a polymer block composed of a styrene-based monomer and a polymer block composed of a conjugated diene-based monomer, or a styrene-based thermoplastic elastomer obtained by subjecting the block copolymer to a hydrogenation treatment, and the content of the elastomer in the rubber-based pressure-sensitive adhesive is 20% by mass or more and 50% by mass or less, the tackifier is at least one selected from a rosin-based resin, a terpene-based resin, a styrene-based resin, a C5-based petroleum resin, a C5 / C9-based petroleum resin, and a hydrogenated petroleum resin, and the content of the tackifier in the rubber-based pressure-sensitive adhesive is 30% by mass or more and 60% by mass or less; 3. The removable adhesive label according to claim 2, wherein the plasticizer is at least one selected from paraffinic oil, naphthenic oil, natural oil, liquid isoprene, liquid butene, and wax, and the content of the plasticizer in the rubber-based adhesive is 20% by mass or less and 50% by mass or less.

4. The removable adhesive label according to claim 3, wherein the elastomer is at least one selected from a styrene-isoprene-styrene triblock copolymer, a styrene-butadiene-styrene copolymer, a styrene-butadiene rubber, a styrene-isoprene diblock copolymer, and a styrene-butadiene diblock copolymer.

5. A package for refrigerated or frozen goods to which the removable adhesive label according to any one of claims 1 to 4 is removably attached.

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