JP6579777B2 - Labeled container and heat-shrinkable cylindrical label - Google Patents

Description

  The present invention relates to a labeled container in which a heat-shrinkable cylindrical label is attached to the container.

Conventionally, in order to attract consumers' attention, a container with a label in which a heat-shrinkable cylindrical label having excellent decorativeness is heat-shrink mounted on a container has been widely used. Such labeled containers are distributed in the market as products with various fillings stored in the containers. The heat-shrinkable cylindrical label is generally called a shrink label or a shrink tube.
As described above, a container with a label is a container in which a heat-shrinkable cylindrical label is attached around the container, so that the containers hit each other or hit foreign matters such as a frame of the transfer line during the transfer of the labeled containers. There is a problem that the outer surface of the heat-shrinkable cylindrical label is damaged. In particular, heat-shrinkable cylindrical labels made of polystyrene resin films or polyolefin resin films are easily damaged.
Patent Document 1 discloses forming a transparent coating layer containing a lubricant on the outer surface of a heat-shrinkable cylindrical label made of an amorphous olefin-based polymer.

However, there is a problem that whitening occurs when the heat-shrinkable cylindrical label is greatly heat-shrinked.
In particular, when the heat-shrinkable cylindrical label is heat-shrink mounted on a container having a large-diameter portion and a small-diameter portion, the region corresponding to the small-diameter portion of the heat-shrinkable cylindrical label becomes whitish, while the large-diameter portion. Since the corresponding region does not become so whitish, there is a problem that whitening is more conspicuous and a labeled container with a poor appearance can be obtained.

JP 2002-132159 A

A first object of the present invention is to provide a labeled container in which a heat-shrinkable cylindrical label is hardly damaged and has a good appearance.
The second object of the present invention is to provide a heat-shrinkable cylindrical label which is not easily damaged and hardly causes poor appearance when mounted on a container.

The labeled container of the present invention includes a cylindrical film that thermally shrinks in the circumferential direction, a first transparent printing layer provided on an outer surface of the cylindrical film, and ink adhesion per unit area than the first transparent printing layer. A heat-shrinkable cylindrical label having a second transparent print layer with a small amount and a second transparent print layer having an ink adhesion area per unit area of 10% to 30%, and the heat-shrinkable tubular label A container having a deposition region to which a label is attached, and the deposition region of the container has a large diameter portion and a small diameter portion, and the first transparent printing layer and the second transparent printing layer However, both are colorless and transparent printing layers, a region provided with the first transparent printing layer corresponds to the large diameter portion, and a region provided with the second transparent printing layer corresponds to the small diameter portion. As described above, the heat-shrinkable cylindrical label is heat-shrink mounted on the container.

In a preferred labeled container according to the present invention, the first transparent printing layer and the second transparent printing layer are each formed from a medium ink containing a lubricant.
In a preferred labeled container of the present invention, the lubricant contains a granular lubricant.
A preferred labeled container according to the present invention is represented by the following formula of the ink adhesion amount per unit area of each of the first transparent printing layer and the second transparent printing layer shrunk following the thermal shrinkage of the tubular film. The ratio is 0.20 to 0.99.
Formula: Ink adhesion amount per unit area of the second transparent printing layer / ink adhesion amount per unit area of the first transparent printing layer.

According to another aspect of the present invention, a heat-shrinkable cylindrical label is provided.
The heat-shrinkable cylindrical label of the present invention includes a tubular film that thermally shrinks in the circumferential direction, a first transparent printed layer provided in a first region on the outer surface of the tubular film, and a first of the tubular film. It has a, a second transparent printing layer ink deposition amount is small per unit area than the second provided in a region and the first transparent printing layer which is shifted in the vertical direction to the region, the first transparent printing layer The second transparent printing layer is a colorless and transparent printing layer, and the ink adhesion area per unit area of the second transparent printing layer is 10% to 30% .

The preferable heat-shrinkable cylindrical label of the present invention further comprises a third transparent printing layer provided between the first region and the second region of the outer surface of the cylindrical film, and the unit of the third transparent printing layer The ink adhesion amount per area is smaller than the first transparent printing layer and larger than the second transparent printing layer.
In a preferred heat-shrinkable cylindrical label of the present invention, the ink adhesion amount per unit area of the third transparent printing layer is gradually reduced from the first transparent printing layer side toward the second transparent printing layer side.

In the container with a label of the present invention, since the transparent printing layer is provided on the outer surface of the heat-shrinkable cylindrical label, the heat-shrinkable cylindrical label is hardly damaged, and the heat-shrinkable cylindrical label is not whitened. Since it is suppressed or whitening is not conspicuous, the appearance is good.
The heat-shrinkable cylindrical label of the present invention is less likely to be whitened or hardly noticeable when heat-shrinkable and attached to a container. Further, even when a foreign object or the like hits the outer surface, the heat-shrinkable cylindrical label is hardly damaged.

The perspective view of the heat-shrinkable cylindrical label of the state which was the heat-shrinkable cylindrical label before heat shrink processing, and was extended in the cylinder shape. The front view of the state which folded the heat-shrinkable cylindrical label flatly. The rear view. Sectional drawing cut | disconnected by the IV-IV line of FIG. The reference enlarged plan view which represented typically the field in which the 1st thru / or the 3rd transparent printing layer was formed. The front view of a container. The front view including the partial cross section which shows the state which externally fitted the heat-shrinkable cylindrical label before heat-shrink processing to the container. The front view of the container with a label. Sectional drawing cut | disconnected by the IX-IX line of FIG. However, the container is not shown in cross section. The front view of the state which folded the heat-shrinkable cylindrical label of the modification into flat shape.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Note that the circumferential direction of the heat-shrinkable cylindrical label means the direction around the axis of the heat-shrinkable cylindrical label when the heat-shrinkable cylindrical label is expanded into a cylindrical shape, and the vertical direction means the cylinder of the heat-shrinkable cylindrical label. Means the axial direction of The vertical direction of the container is a direction parallel to the vertical direction of the heat-shrinkable cylindrical label when the heat-shrinkable cylindrical label is fitted on the container. Furthermore, the description “PPP to QQQ” means “PPP or more and QQQ or less”.
Note that in each cross-sectional view, the thickness, dimensions, and the like are different from the actual ones.

[One Embodiment]
The labeled container of the present invention includes a container and a heat-shrinkable cylindrical label that is heat-shrinkably attached to a deposition region of the container.
Hereinafter, after explaining a heat-shrinkable cylindrical label previously, the detail of the labeled container of this invention is demonstrated.

<Heat-shrinkable cylindrical label>
1 to 3 show a heat-shrinkable cylindrical label 1 before being attached to a container (before heat-shrinking).
FIG. 1 shows a heat-shrinkable cylindrical label in a state of being expanded into a cylindrical shape immediately before being attached to a container, and FIG. 2 shows a heat-shrinkable cylindrical label in a state of being folded into a flat shape. Usually, the heat-shrinkable cylindrical label 1 formed in a cylindrical shape before being attached to a container is conceptually a long cylindrical label long body in which a plurality of the heat-shrinkable cylindrical labels 1 are continuously connected in the longitudinal direction. The cylindrical label elongated body is provided in a form (the cylindrical label elongated body is not shown), and the cylindrical label elongated body is stored and transported in a state of being flattened and wound on a roll. A flat heat-shrinkable cylindrical label 1 as shown in FIG. 2 is obtained by cutting the scale at a predetermined location. As shown in FIG. 1, the flat heat-shrinkable cylindrical label 1 is attached to a container by being expanded into a cylindrical shape, fitted onto the container, and heated.

  The heat-shrinkable cylindrical label 1 of the present invention may be formed into a cylindrical shape at the same time as being wound around a container. Specifically, the heat-shrinkable cylindrical label 1 shown in FIGS. 1 to 3 is obtained by forming a heat-shrinkable base material into a cylindrical shape in advance before being attached to a container. On the other hand, as a heat-shrinkable cylindrical label that is also heat-shrinkable and mounted on a container, there is a type that is wound around a container and formed into a cylindrical shape (this type is also called a wound cylindrical label or a wound shrink label). . In this wound cylindrical label, the back surface of the second side end portion of the heat-shrinkable film is partially bonded to the container, the base material is wound around the container, and the first side of the film is wound on the surface of the second side end portion. It is a heat-shrinkable cylindrical label (heat-shrinkable cylindrical label that is formed into a cylindrical shape simultaneously with winding) by bonding the back surface of the side end portion.

(Tubular film)
The heat-shrinkable tubular label 1 has a tubular film 2 in which a heat-shrinkable film having heat-shrinkability is formed into a tubular shape. The tubular film 2 can be thermally contracted in the circumferential direction.
Specifically, the heat-shrinkable film is rolled so that the main heat-shrink direction is the circumferential direction, the first side end and the second side end of the heat-shrinkable film are overlapped, and The cylindrical film 2 is comprised by adhere | attaching a part or all in a direction using a solvent or an adhesive agent. Such a tubular film 2 has a property of being thermally contracted mainly in the circumferential direction. The portion 2a to which the overlapping surface is bonded extends in the vertical direction from the upper edge to the lower edge of the tubular film 2, and this portion is generally called a seal portion.

The heat-shrinkable film has a property of being heat-shrinkable in at least one direction (main heat-shrinking direction) when heated to a desired temperature such as 70 ° C to 100 ° C. This property is referred to as heat shrinkability in this specification. The heat-shrinkable film may be slightly heat-shrinkable or thermally stretched in the other direction (the other direction is a direction perpendicular to the one direction in the film plane). The heat shrinkage rate of the heat-shrinkable film (equal to the heat shrinkage rate of the heat-shrinkable cylindrical label 1) is not particularly limited as long as it can be attached to the container, and is, for example, one direction when heated to 90 ° C. The thermal contraction rate in is 30% or more, preferably 40% or more, more preferably 50% or more, and further preferably 60% or more. When the heat-shrinkable film slightly heat shrinks or stretches in the other direction, the heat shrinkage rate in the other direction when heated to 90 ° C. is, for example, −3% to 15%. The minus of the heat shrinkage rate in the other direction means thermal expansion. The heat shrinkage rate when heated to 90 ° C. is the length of the film before heating (original length) and the length of the film after being immersed in warm water of 90 ° C. for 10 seconds (after immersion). Length) and is obtained by substituting into the following equation.
Heat shrinkage rate (%) = [{(original length in one direction (or other direction)) − (length after immersion in one direction (or other direction))} / (one direction (or other direction) Original length)] × 100.

The heat-shrinkable film is not particularly limited, and is not particularly limited. For example, polystyrene resins such as polystyrene, polyester resins such as polyethylene terephthalate and polylactic acid, polyolefin resins such as polypropylene and cyclic olefin, polycarbonate, chloride A film containing one kind selected from thermoplastic resins such as vinyl resins, or a mixture of two or more kinds can be used. As a heat-shrinkable film, a laminated film in which two or more kinds of heat-shrinkable films are laminated and integrated, or a non-heat-shrinkable layer such as a metal vapor deposition layer is laminated and integrated in a film having heat-shrinkability. The laminated film made can also be used. The film can be provided with heat shrinkability by forming the film by a known production method, stretching, and heat aging treatment.
The thickness of the heat-shrinkable film is not particularly limited, and is, for example, 20 μm to 100 μm, preferably 25 μm to 80 μm, and more preferably 30 μm to 60 μm.
The heat-shrinkable film may be either transparent or opaque, but when the design print layer is provided on the inner surface side, a transparent film is used. In the present specification, the transparent includes colored transparent or colorless transparent, but is preferably colorless transparent.

As will be described later, in the present invention in which a transparent printing layer is provided in order to prevent the tubular film 2 from being damaged, the significance of the transparent printing layer is manifested when a heat-shrinkable film that is relatively easily damaged is used. Easy to convert.
Examples of heat-shrinkable films that are relatively easily damaged include polystyrene films and polyolefin films. However, when the heat-shrinkable film is a laminated film in which two or more kinds of films are laminated and integrated, at least one surface (this one surface of the tubular film 2 when formed on the tubular film 2) The outer surface) is composed of the polystyrene film or the polyolefin film.

The polystyrene film is a film containing a polystyrene resin as a main component. The polyolefin film is a film containing a polyolefin resin as a main component. In addition, in this specification, a main component means the most resin component on the mass reference | standard among the resin components which comprise the film.
The polystyrene resin is a polymer composed of a styrene monomer as an essential monomer component. That is, it is a polymer containing at least a structural unit derived from a styrene monomer in the molecule (in one molecule). The polystyrene resin may be a homopolymer or a copolymer.
Although it does not specifically limit as said styrene-type monomer, For example, styrene, alpha-methyl styrene, m-methyl styrene, p-methyl styrene, p-ethyl styrene, p-isobutyl styrene, pt-butyl styrene, Examples include chloromethylstyrene. Among these, styrene is preferable from the viewpoint of availability, material price, and the like. In addition, the said styrene-type monomer may use only 1 type, and may use 2 or more types.

  The polystyrene resin is not particularly limited. For example, a homopolymer of a styrene monomer such as general-purpose polystyrene (GPPS) which is a homopolymer of styrene; only two or more styrene monomers are used. Copolymer constituted as a monomer component; styrene-diene copolymer; copolymer such as styrene-polymerizable unsaturated carboxylic acid ester copolymer; polystyrene and synthetic rubber (for example, polybutadiene, polyisoprene, etc.) ), High-impact polystyrene (HIPS) such as polystyrene obtained by graft-polymerizing styrene to synthetic rubber; polymers containing styrene monomers (for example, styrene monomers and (meth) acrylic acid ester monomers) A rubber-like elastic body is dispersed in a continuous phase of a copolymer with a polymer, and the copolymer is graft-polymerized on the rubber-like elastic body. Styrene (referred graft type high impact polystyrene "graft HIPS"), such as styrene elastomer. As the polystyrene resin, a styrene-diene copolymer is preferable. In addition, the said polystyrene-type resin may use only 1 type, and may use 2 or more types.

The polystyrene film may contain a resin other than the polystyrene resin (a resin other than the main resin), but preferably a polystyrene film that does not substantially contain a resin other than the polystyrene resin is used.
Examples of the resin other than the polystyrene resin include a polyester resin, a polyolefin resin, a vinyl chloride resin, a polycarbonate resin, a polyamide resin, and a thermoplastic elastomer.
The content of the polystyrene resin is not particularly limited, but is preferably 50% by mass or more, more preferably 60% by mass or more, and still more preferably 80% by mass with respect to the entire polystyrene film (100% by mass). As described above, it is particularly preferably 90% by mass or more. The upper limit of the content is not particularly limited, and may be 100% by mass.

  The polyolefin-based resin is a polymer (including an olefin-based elastomer) composed of olefin as an essential monomer component, that is, a polymer including at least an olefin in a molecule (in one molecule). Although it does not specifically limit as said olefin, For example, alpha-olefins, such as ethylene, propylene, 1-butene, and 4-methyl-1- pentene, are mentioned.

Examples of the polyolefin resin include a polymer composed of ethylene as an essential monomer component (polyethylene resin), a polymer composed of propylene as an essential monomer component (polypropylene resin), and an ionomer. And amorphous cyclic olefin-based polymers. The polyolefin resin is not particularly limited, but among them, a polyethylene resin, a polypropylene resin, and an amorphous cyclic olefin polymer are preferable, and a polyethylene resin and a polypropylene resin are more preferable. More specifically, the polyolefin resin is preferably an ethylene-α-olefin copolymer or a propylene-α-olefin copolymer, more preferably a propylene-α-olefin copolymer, and a propylene-α-olefin graft copolymer. More preferred are copolymers or propylene-α-olefin random copolymers. The polyolefin resin may be used alone or in combination of two or more.
The polyethylene resin is a polymer composed of ethylene as an essential monomer component, that is, a polymer containing at least a structural unit derived from ethylene in the molecule (in one molecule). Examples of the polyethylene-based resin include ethylene homopolymers; copolymers composed of ethylene and one or more monomer components (monomer components other than ethylene) as essential monomer components (ethylene copolymer). Polymer) and the like.

  The polypropylene resin is not particularly limited. For example, a propylene homopolymer (homopolypropylene); a copolymer composed of propylene and one or more olefins (olefins other than propylene) as essential monomer components. Examples thereof include a blend (propylene copolymer). As the propylene copolymer, a copolymer composed of propylene and one or more α-olefins as essential monomer components (propylene-α-olefin copolymer) is particularly preferable.

The polyolefin-based film may contain a resin other than the polyolefin-based resin (resin other than the main component resin), but preferably a polyolefin-based film that does not substantially contain a resin other than the polyolefin-based resin is used.
Examples of the resin other than the polyolefin-based resin include polyester-based resins, polystyrene-based resins, vinyl chloride-based resins, polycarbonate-based resins, polyamide-based resins, and thermoplastic elastomers.
The content of the polyolefin resin is not particularly limited, but is preferably 50% by mass or more, more preferably 60% by mass or more, and further preferably 80% by mass with respect to the entire polyolefin film (100% by mass). As described above, it is particularly preferably 90% by mass or more. The upper limit of the content is not particularly limited, and may be 100% by mass.

(Design printing layer)
A design print layer (not shown) is provided on the inner surface or outer surface of the tubular film 2 or on a part or the whole of the inner surface and outer surface as necessary. The design printing layer is preferably provided on at least a part or the whole of the inner surface of the tubular film 2, and more preferably only on the inner surface of the tubular film 2. The design print layer is, for example, a single-layer or multi-layer print portion in which a design display such as a product name, a company name, an explanatory note, and a design is expressed in a desired color.
The design printing layer can be formed by various printing methods such as a gravure printing method using a conventionally known printing ink.
The thickness of the design printing layer is not particularly limited, but is preferably about 1 μm to 5 μm, for example.

(Transparent printing layer)
The heat-shrinkable cylindrical label 1 includes the cylindrical film 2, a first transparent printing layer 31 provided in a first area on the outer surface of the cylindrical film 2, and a first area of the cylindrical film 2. And a second transparent printing layer 32 provided in a second region shifted in the vertical direction. Preferably, it further has a third transparent printing layer 33 provided in a third region on the outer surface of the tubular film 2. The third region is one region of the tubular film 2 between the first region and the second region in the longitudinal direction of the tubular film 2. The first region, the third region, and the second region may be continuous in the longitudinal direction of the tubular film 2, and at least two regions selected from them may be discontinuous in the longitudinal direction.
The first transparent printing layer 31, the second transparent printing layer 32, and the third transparent printing layer 33 are preferably provided around the tubular film 2 (so as to extend in the circumferential direction of the tubular film 2). Provided).

The first transparent printed layer 31, the second transparent printed layer 32, and the third transparent printed layer 33 are formed from a transparent ink. The first transparent printing layer 31, the second transparent printing layer 32, and the third transparent printing layer 33 are all layers in which transparent ink is solidified.
As the transparent ink, for example, an ink obtained by removing a colorant (pigment or the like) from a commonly used printing ink (hereinafter, such ink is referred to as “medium ink”) can be used. The medium ink is usually composed of a binder resin, a solvent, and, if necessary, a plasticizer. Examples of the binder resin include acrylic resins and urethane resins.
Preferably, the first transparent printed layer 31, the second transparent printed layer 32, and the third transparent printed layer 33 are all formed from a medium ink containing a lubricant. Hereinafter, a medium ink containing a lubricant may be referred to as a “lubricant ink”. By using the lubricant-containing ink, the first to third transparent printing layers 31, 32, 33 (the first transparent printing layer 31, the second transparent printing layer 32, and the third transparent printing layer 33) excellent in slipperiness are formed. it can.
The lubricant ink will be described in detail later.

The first to third transparent printing layers 31, 32, 33 may be formed from the same lubricant ink, and two transparent printing layers selected from them may be formed from different lubricant inks, Three transparent printing layers may be formed from different lubricant-containing inks. Preferably, the first to third transparent printing layers 31, 32, and 33 are all formed from the same lubricant-containing ink. In the same lubricant ink, the lubricant component and the medium ink component are the same, and in the different lubricant ink, at least one of the lubricant component and the medium ink component is different.
The ink adhesion amount per unit area of the second transparent printing layer 32 is smaller than the ink adhesion amount per unit area of the first transparent printing layer 31.
Further, the ink adhesion amount per unit area of the third transparent printing layer 33 is smaller than the first transparent printing layer 31 and larger than the second transparent printing layer 32, and preferably the first transparent printing layer 31. The size gradually decreases from the side toward the second transparent printed layer 32 side.

Specifically, as shown in FIGS. 2 and 3, the first to third transparent printing layers 31, 32, and 33 are all provided in a band shape in the circumferential direction of the tubular film 2. 2 and 3, in order to illustrate the first to third transparent print layers in an easy-to-understand manner, the first transparent print layer 31 is shaded, the second transparent print layer 32 is shaded, and the third transparent print layer Innumerable dots are attached to the print layer 33.
The first to third transparent printing layers 31, 32, and 33 are all provided over the entire circumferential direction of the tubular film 2. That is, the first to third transparent print layers 31, 32, and 33 are formed in a continuous band shape in the circumferential direction of the tubular film 2. But the 1st thru | or 3rd transparent printing layers 31, 32, and 33 may not be provided in the one part area | region of the circumferential direction of the cylindrical film 2. FIG. That is, the first to third transparent printing layers 31, 32, and 33 may be independently formed discontinuously in the circumferential direction of the tubular film 2.

  However, when the tubular film 2 is formed by overlapping and adhering the first side end and the second side end of the heat-shrinkable film as described above, it is arranged on the outside in terms of production. A region Y where the transparent printing layer is not formed is generated in the vicinity of the edge of the side end portion to be formed. The region Y where the transparent printing layer is not formed is formed in a streak shape in the longitudinal direction of the tubular film 2 with a slight width along the seal portion 2a. FIG. 2 shows the region Y in white. However, when viewed as a whole, in the example shown in FIGS. 2 and 3, the first to third transparent printing layers 31, 32, 33 are formed in a substantially continuous band shape in the circumferential direction of the tubular film 2. It can be said that.

In the illustrated example, a second transparent printing layer 32, a third transparent printing layer 33, and a first transparent printing layer 31 are provided in order from the upper side of the tubular film 2. The second transparent printing layer 32 is provided in a region on the lower side in the vertical direction from the upper edge of the tubular film 2, but may be provided from a position lower than the upper edge of the tubular film 2. The first transparent printing layer 31 is provided in a region on the upper side in the vertical direction from the lower edge of the tubular film 2, but may be provided from a position higher than the lower edge of the tubular film 2.
The lengths in the vertical direction of the first to third transparent printing layers 31, 32, 33 are not particularly limited, and are appropriately set according to the container.
As will be described later, for a container having a large diameter portion and a small diameter portion, the first transparent printing layer 31 is in the large diameter portion, the second transparent printing layer 32 is in the small diameter portion, and the third transparent printing layer 33 is. It is preferable that the heat-shrinkable cylindrical label 1 is heat-shrinked into the container so as to correspond between the large-diameter portion and the small-diameter portion.
Therefore, the lengths in the vertical direction of the first to third transparent printing layers 31, 32, 33 are set according to the shape and dimensions of the container.

As described above, the first to third transparent printing layers 31, 32, and 33 have the ink adhesion amount per unit area of the first transparent printing layer 31> the ink adhesion amount per unit area of the third transparent printing layer 33> The relationship of the ink adhesion amount per unit area of the second transparent printing layer 32 is satisfied. Hereinafter, this relationship may be referred to as relationship 1.
As for the ink adhesion amount per unit area of each of the first to third transparent printing layers 31, 32, 33, a specific range is arbitrarily extracted from each of the transparent printing layers 31, 32, 33, and within the specific range. It is obtained by measuring the total weight of the ink adhered to the ink. For example, in FIG. 3, the specific range is indicated by a dotted broken line. The specific range is, for example, 10 mm × 10 mm.

FIG. 5 is an enlarged view schematically showing a region where the first transparent printed layer 31, the third transparent printed layer 33, and the second transparent printed layer 32 are provided.
In FIG. 5, it should be noted that the longitudinal lengths of the first transparent printed layer 31, the third transparent printed layer 33, and the second transparent printed layer 32 are different from those in FIGS. 2 to 4.
The black coating part shown in FIG. 5 is a part (ink adhesion part) where ink adhered. When viewed microscopically, each of the transparent printing layers 31, 32, 33 is configured such that a plurality of ink adhering portions are arranged in the longitudinal direction and the circumferential direction of the tubular film 2, and when viewed macroscopically, FIG. As shown, each of the transparent printing layers 31, 32, and 33 forms one layer.

  As a method of forming the first to third transparent printing layers 31, 32, 33 satisfying the relationship 1, (1) ink per unit area of each of the first to third transparent printing layers 31, 32, 33 Adjust the adhesion area, (2) Adjust the thickness to which each of the first to third transparent printing layers 31, 32, 33 adheres, (3) Adjust in both (1) and (2) To do.

The ink adhesion area per unit area of each of the first to third transparent printing layers 31, 32, 33 of (1) is the ratio of the ink adhesion area to the unit area of each transparent printing layer 31, 32, 33. Yes, according to the following formula. The ink adhesion area is also measured by arbitrarily extracting a specific range from each of the transparent printing layers 31, 32, and 33.
Formula: Ink adhesion area (%) per unit area = (sum of ink adhesion areas within a specific range / area of the specific range) × 100.

  For example, the individual ink adhering portions 311 constituting the first transparent printing layer 31 have a large area, and the individual ink adhering portions 321 constituting the second transparent printing layer 32 have a small area. Each ink adhering portion 331 constituting the layer 33 has an intermediate area between the two ink adhering portions 311 and 321. The third transparent printing layer 33 whose ink adhesion amount per unit area becomes smaller stepwise as it goes from the first transparent printing layer side to the second transparent printing layer side is the ink per unit area of the third transparent printing layer 33. It can be formed by decreasing the adhesion area stepwise from the first transparent printing layer 31 side toward the second transparent printing layer 32 side (see FIG. 5).

In the example shown in FIG. 5, the first transparent printing layer 31 is constituted by a plurality of ink adhering portions 311 having the same area, but is constituted by ink adhering portions (not shown) having different areas. It may be. Similarly, the second transparent printing layer 32 may be composed of ink adhering portions having different areas (not shown). Moreover, although the ink adhesion part which comprises the 3rd transparent printing layer 33 is a thing of the same area in the circumferential direction, the ink adhesion part of a different area may be scattered in the circumferential direction (not shown).
Further, in FIG. 5 schematically represented, each ink adhering portion 311, 321, 331 has a circular shape in plan view, but each ink adhering portion is not limited to this shape in plan view, but is substantially rectangular, It may be a shape. Further, the ink adhering portions 311, 321, 331 constituting the first to third transparent printing layers 31, 32, 33 may be similar to each other or may not be similar to each other.

  Thus, by adjusting the areas of the individual ink adhering portions 311, 321, and 331 constituting the first to third transparent printing layers 31, 32, and 33, the first to third transparent conditions that satisfy the relationship of the above formula 1 are satisfied. Printing layers 31, 32, and 33 can be formed.

When the method (2) is adopted, the thicknesses of the individual ink adhering portions 311, 321, 331 constituting the first to third transparent printing layers 31, 32, 33 are adjusted.
For example, the individual ink adhering portions 311 constituting the first transparent printing layer 31 are large in thickness, and the individual ink adhering portions 321 constituting the second transparent printing layer 32 are small in thickness, so that the third transparent printing is performed. Each ink adhering portion 331 constituting the layer 33 has an intermediate thickness between the two ink adhering portions 311 and 321. The third transparent printing layer 33, which has a stepwise smaller amount of ink adhering per unit area from the first transparent printing layer side to the second transparent printing layer side, is formed on the ink attaching portion 331 of the third transparent printing layer 33. It can be formed by reducing the thickness stepwise from the first transparent printed layer 31 side toward the second transparent printed layer 32 side.
In addition, although each thickness of the 1st thru | or 3rd transparent printing layers 31, 32, and 33 is not specifically limited, For example, they are 0.5 micrometers-5 micrometers independently, for example.
In this way, by adjusting the thickness of the individual ink adhering portions 311, 321, and 331 constituting the first to third transparent printing layers 31, 32, and 33, the first to third transparent that satisfy the relationship of Expression 1 above. Printing layers 31, 32, and 33 can be formed.
Moreover, even if the area and thickness of each ink adhesion part 311,321,331 are adjusted suitably, the 1st thru | or 3rd transparent printing layers 31,32,33 which satisfy | fill the relationship of the said Formula 1 can be formed.

  The 1st thru | or 3rd transparent printing layers 31, 32, and 33 are each formed by apply | coating transparent inks, such as lubricant-containing ink, to a heat-shrinkable film with a well-known printing method, and making it solidify. The printing method is not particularly limited, and examples thereof include a gravure printing method, a flexographic printing method, a letterpress printing method, and an offset printing method.

The ink adhesion amount per unit area of each of the first to third transparent printing layers 31, 32, and 33 is not particularly limited as long as the relationship 1 is satisfied. Preferably, the heat-shrinkable cylindrical label is used. 1 is set in accordance with the actual heat shrinkage rate when the container 1 is heat shrink mounted.
Here, the thermal contraction rate at the time of mounting of the heat-shrinkable cylindrical label 1 differs in the longitudinal direction of the label 1 according to the shape of the deposition region of the container. At the time of mounting, for example, the heat shrinkage rate of the region corresponding to the large diameter portion of the container in the heat shrinkable cylindrical label 1 is small, and the heat shrinkage rate of the region corresponding to the small diameter portion of the container is relatively large.
For example, a case where the method (1) is employed will be described.
For example, when the heat shrinkage rate of the first region (region where the first transparent printing layer 31 is provided) when the heat-shrinkable cylindrical label 1 is attached to the container is set to be more than zero and less than 20%, The ink adhesion area per unit area of the first transparent printing layer 31 is 80% to 100%.
The heat shrinkage rate of the second region (region where the second transparent printing layer 32 is provided) when the heat-shrinkable cylindrical label 1 is attached to the container exceeds 30% and is below the shrinkage limit of the heat-shrinkable film. When setting, the ink adhesion area per unit area of the 2nd transparent printing layer 32 shall be 10%-30%.
The ink adhesion area per unit area of the third transparent printing layer 33 is set between the two ink adhesion areas. In addition, the third transparent printing layer 33, which is small in a stepwise manner as the ink adhesion amount per unit area goes from the first transparent printing layer side to the second transparent printing layer side, is the per unit area of the third transparent printing layer 33. The ink adhesion area gradually decreases as a whole. In this case, the ink adhering area per unit area of the third transparent printing layer 33 may be uniformly reduced toward the second transparent printing layer 32 side (including a case where the third transparent printing layer 33 becomes smaller in a stepped manner), and is uneven. It may be smaller. Examples of the case where the ink adhesion area becomes unevenly small include a case where the degree of reduction (decrease gradient) is large on the first transparent printing layer 31 side or the second transparent printing layer 32 side.

The lubricant-containing ink comprises a lubricant component and a medium ink component.
The lubricant component is blended mainly for imparting slipperiness to the transparent printing layer. The medium ink component is a material mainly constituting the ink, and the binder resin among them is mainly a layer forming material for the transparent printing layer.
The lubricant is not particularly limited as long as it has an effect of improving slipperiness, and for example, either an organic lubricant or an inorganic lubricant may be used. Examples of the lubricant include inorganic particles (powdered inorganic substance and the like), organic particles (powdered organic substance and the like), granular lubricants such as waxes, and liquid lubricants such as silicone oil. A lubricant can be used individually or in mixture of 2 or more types. When two or more types are used in combination as a lubricant, a combination of inorganic particles (particularly inorganic fine particles) or silicone oil and waxes is preferable.

Examples of the inorganic particles include silica, talc, mica, kaolin, bentonite, clay, graphite, fluorinated graphite, carbon black, titanium oxide, zinc oxide, magnesium oxide, boron nitride, molybdenum disulfide, tungsten disulfide, and carbonic acid. Examples include calcium, calcium sulfate, calcium titanate, calcium phosphate, calcium hydroxide, aluminum hydroxide, magnesium hydroxide, glass powder, alumina, and metal powder. Examples of the organic particles include polyacetal, poly (meth) acrylic acid metal salt, polyacrylonitrile, polyacrylic amide, melamine resin, phenol resin, starch, cellulose resin, and fluororesin powder. .
Examples of the wax include polyolefin wax such as polyethylene wax, fatty acid amide, fatty acid ester, paraffin wax, polytetrafluoroethylene wax, carnauba wax and the like.

The medium ink component is a printing ink that is substantially free of colorant. Note that “substantially free of colorant” means that a trace amount of colorant contained inevitably is allowed, and a significant amount of colorant is excluded.
The medium ink component contains a binder resin and, if necessary, various additives.
When the binder resin is classified according to its solidification performance, examples thereof include photopolymerization types such as a dry type and an ultraviolet curable type.
Examples of the dry binder resin include acrylic resins, urethane resins, cellulose resins such as nitrocellulose and cellulose / acetate / butyrate, vinyl chloride resins, vinyl acetate resins, and polyester resins. Examples of the photopolymerizable binder resin include acrylate-based photopolymerizable resins and polymerization initiators. Examples of the solvent include esters such as ethyl acetate, propyl acetate, and butyl acetate; alcohols such as methanol, ethanol, isopropyl alcohol, and butanol; ketones such as acetone and methyl ethyl ketone; hydrocarbons such as toluene; A solvent etc. are mentioned. Examples of the additive include a plasticizer, an anti-settling agent, a dispersion stabilizer, a filler, an antioxidant, an ultraviolet absorber, an antistatic agent, and a flame retardant.

A medium ink component containing an acrylic resin is preferred because a transparent printing layer having an excellent effect of preventing scratches can be formed.
Examples of the monomer component constituting the acrylic resin include (meth) acrylic acid alkyl esters such as methyl (meth) acrylate (preferably (meth) acrylic acid C1-C12 alkyl ester); ) Carboxyl group-containing polymerizable unsaturated compounds such as acrylic acid or anhydrides thereof; hydroxyl group-containing (meth) acrylic acid esters such as 2-hydroxymethyl (meth) acrylate (preferably hydroxy (meth) acrylic acid C1-C8 alkyl) Ester) and the like. The acrylic resin can be used alone or in combination of two or more resins having different monomer compositions. For example, the acrylic resin includes (i) a carboxyl group- and hydroxyl group-containing acrylic polymer, (ii) a mixture of a carboxyl group-containing acrylic polymer and a hydroxyl group-containing acrylic polymer, (iii) a carboxyl group and a hydroxyl group. A mixture of a non-group-containing acrylic polymer, a carboxyl group-containing acrylic polymer, a hydroxyl group-containing acrylic polymer, and the like can be used. The weight average molecular weight of the acrylic resin is preferably 8,000 to 50,000, and more preferably 20,000 to 40,000. The glass transition temperature (Tg) of the acrylic resin is preferably 35 ° C to 80 ° C, and more preferably 40 ° C to 60 ° C.
In this embodiment, the 1st thru | or 3rd transparent printing layers 31, 32, and 33 are formed using the same lubricant ink.

The content of the lubricant component for each of the first to third transparent printing layers 31, 32, 33 is not particularly limited, but the content (mass%) of the lubricant component of the second transparent printing layer 32 is the smallest, It is preferable that the content (mass%) of the lubricant component of 1 transparent printing layer 31 is the largest.
The content of the lubricant component in the first to third transparent printing layers 31, 32, 33 is, for example, 0. 1% by mass to 25% by mass, preferably 0.1% by mass to 20% by mass. It should be noted that the content of the lubricant component is not the content in the lubricant-containing ink.

<Container>
The heat-shrinkable cylindrical label 1 of the present invention is preferably attached to a container having an adhesion region having a large diameter portion and a small diameter portion. However, the heat-shrinkable cylindrical label 1 of the present invention is not limited to a case where the deposition region is attached to a container having a large-diameter portion and a small-diameter portion. It is also possible to attach to a container having a shape in which the outer peripheral length does not change in the vertical direction. The said adhesion | attachment area | region says the part to which a heat-shrinkable cylindrical label is mounted | worn among the outer surfaces of a container. Usually, the deposition region is often a part of the container, but may be the entire container.
For example, as illustrated in FIG. 6, the container 9 includes a large-diameter portion 91 and a small-diameter portion 92 formed at a position shifted in the vertical direction with respect to the large-diameter portion 91. Further, in the vertical direction, there is a reduced diameter portion 93 whose outer peripheral length gradually changes between the large diameter portion 91 and the small diameter portion 92. Here, the vertical direction of the container 9 refers to the axial direction of the container, and the position shifted in the vertical direction means that the position in the axial direction is different, and a part of the large-diameter portion 91. It is not included that part of the small diameter portion 92 overlaps.

The large-diameter portion 91 refers to a portion having the largest outer peripheral length in the deposition region of the container 9, and the small-diameter portion 92 refers to a portion having the smallest outer peripheral length in the deposition region of the container 9. . The reduced diameter portion 93 is a portion having an intermediate outer peripheral length between the outer peripheral length of the large diameter portion 91 and the outer peripheral length of the small diameter portion 92 in the deposition region of the container 9. Accordingly, the portion of the container 9 having the longest outer peripheral length may or may not correspond to the large-diameter portion 91 of the deposition region. Similarly, the portion of the container 9 having the smallest outer peripheral length may or may not correspond to the small diameter portion 92 of the deposition region.
The reduced diameter portion 93 may have a linear shape (or a curved shape) whose outer shape changes continuously as viewed from the front of the container 9 or may have a step shape whose outer shape changes stepwise. In the illustrated example, the reduced diameter portion 93 has a linear shape whose outer shape continuously changes when viewed from the front of the container 9.

The horizontal cross-sectional outer shape of the deposition region (the deposition region including the large-diameter portion 91, the small-diameter portion 92, and the reduced-diameter portion 93) of the container 9 in the illustrated example is substantially circular. However, the horizontal cross-sectional outline may be a substantially elliptical shape, a substantially rectangular shape, a substantially triangular shape, a substantially polygonal shape such as a substantially hexagonal shape, or the like. Moreover, the horizontal cross-sectional external shape may differ in the vertical direction of the deposition area | region of the container 9. FIG. For example, a case where the horizontal cross-sectional outer shape of the small-diameter portion 92 is substantially circular and the horizontal cross-sectional outer shape of the large-diameter portion 91 is substantially rectangular can be exemplified. In addition, the said horizontal cross-sectional external shape means the external shape when a deposition area | region is cut | disconnected by the surface (perpendicular | vertical surface with respect to a vertical direction) including the circumferential direction of the container 9. FIG.
The ratio of the outer peripheral length of the small-diameter portion 92 to the outer peripheral length of the large-diameter portion 91 (the outer peripheral length of the small-diameter portion 92 / the outer peripheral length of the large-diameter portion 91) in the deposition region of the container 9 is, for example, 1 / 5-9 / 10, preferably 1/4 to 4/5, and more preferably 1/3 to 7/10.

The filling material stored in the container 9 is not particularly limited, but typically, foods such as beverages, seasonings, jelly, and instant noodles, toiletries such as shampoos, rinses, conditioners, detergents, cosmetics, chemicals, Sanitary goods, toys, machine parts.
The material of the container 9 is not particularly limited, and examples thereof include thermoplastic resins such as polyethylene terephthalate and polypropylene, thermosetting resins, glass, metal, and porcelain.

<Container with label>
The labeled container 10 of the present invention includes the heat-shrinkable cylindrical label 1 and a container 9 having a large diameter portion 91 and a small diameter portion 92 in a deposition region. The heat-shrinkable cylindrical label 1 is heat-shrinkably attached to a deposition area including the large diameter portion 91 and the small diameter portion 92.
Specifically, the heat-shrinkable cylindrical label 1 folded in a flat shape as shown in FIGS. 2 and 3 is opened in a cylindrical shape as shown in FIG. The first region of the heat-shrinkable cylindrical label 1 (one region of the tubular film 2 provided with the first transparent printing layer 31) is in the large diameter portion 91, and the third region (the third transparent printing layer 33 is One region of the provided tubular film 2) corresponds to the reduced diameter portion 93, and the second region (one region of the tubular film 2 provided with the second transparent printing layer 32) corresponds to the small diameter portion 92. Then, the heat-shrinkable cylindrical label 1 is externally fitted to the deposition region of the container 9 (see FIG. 7). By heating the heat-shrinkable tubular label 1 to a predetermined temperature, the tubular film 2 is heat-shrinked in the circumferential direction, and the heat-shrinkable tubular label 1 is attached to the container 9.

As shown in FIGS. 8 and 9, the heat-shrinkable cylindrical label 1 attached with heat-shrink is obtained from the large-diameter portion 91, the reduced-diameter portion 93, and the small-diameter portion 92 of the container 9. It is in close contact with the outer shape. In the labeled container 10, the first region (region where the first transparent printing layer 31 is provided) of the heat-shrinkable cylindrical label 1 corresponds to the large diameter portion 91, and the third region (third transparent printing layer 33). Is provided in the container 9 corresponding to the reduced diameter portion 93, and the second region (region provided with the second transparent printing layer 32) is attached to the small diameter portion 92.
However, the fact that the first to third regions of the heat-shrinkable cylindrical label 1 are attached corresponding to the large-diameter portion 91, the reduced-diameter portion 93, and the small-diameter portion 92, respectively, is attached strictly correspondingly. In addition to the case where it is attached, the case where it is generally attached is included.
As a case where the first to third regions of the heat-shrinkable cylindrical label 1 are attached to the large-diameter portion 91, the reduced-diameter portion 93, and the small-diameter portion 92, respectively, for example, (A) First When the region is mounted across the large diameter portion 91 and the reduced diameter portion 93 (even in this case, the first region is mounted corresponding to the large diameter portion 91), (B) the third region Is mounted across the large diameter portion 91 and the reduced diameter portion 93 or / and the reduced diameter portion 93 and the small diameter portion 92 (even in this case, the third region is mounted corresponding to the reduced diameter portion 93. (C) When the second region is mounted across the reduced diameter portion 93 and the small diameter portion 92 (even in this case, the second region is mounted corresponding to the small diameter portion 92). , Etc.

The first to third transparent printing layers 31, 32, 33 of the heat-shrinkable cylindrical label 1 before the heat-shrinking process satisfy the above relationship 1.
When the heat-shrinkable tubular label 1 is heated, the entire tubular film 2 including the first to third regions is thermally shrunk in the circumferential direction. At this time, the tubular film 2 follows the tubular film 2 and has its tubular shape. The 1st thru | or 3rd transparent printing layers 31, 32, and 33 provided in the outer surface of the film 2 also shrink | contract. As the cylindrical film 2 contracts, the circumferential interval between the ink adhering portions constituting the first to third transparent printing layers 31, 32, 33 is reduced (the film area is reduced and the ink adhering portions are arranged in the circumferential direction). Therefore, the amount of ink attached per unit area of the first to third transparent printing layers 31, 32, 33 is increased.

Since the first region is mounted corresponding to the large diameter portion 91, the heat shrinkage rate of the first region is relatively small, and the second region is mounted corresponding to the small diameter portion 92. The heat shrinkage rate of the third region is relatively large, and the third region is mounted corresponding to the reduced diameter portion 93, so the heat shrinkage rate of the third region increases from the first region side toward the second region side. Yes.
The first transparent printing layer 31 provided in the first region having a small heat shrinkage rate has a relatively small increase rate of the ink adhesion amount, and the second transparent printing layer 32 provided in the second region having a large heat shrinkage rate is The third transparent printing layer 33 provided in the third region where the increase rate of the ink adhesion amount is relatively large and the thermal shrinkage rate changes is the second increase rate of the ink adhesion amount from the first transparent printing layer 31 side. It becomes larger toward the transparent printing layer 32 side.
For this reason, the heat-shrinkable cylindrical label 1 after heat shrinkage mounted on the deposition area of the container 9 has the first transparent print layer 31, the second transparent print layer 32, and the third transparent print layer 33, respectively. The ink adhesion amount per unit area becomes approximate.
The ratio represented by the following formula of the ink adhesion amount per unit area of each of the first transparent printed layer and the second transparent printed layer 32 that has been contracted following the thermal contraction of the tubular film 2 is preferably 0. .20 to 0.99, more preferably 0.30 to 0.95, and still more preferably 0.40 to 0.90.
Formula: Ink adhesion amount per unit area of the second transparent printing layer / ink adhesion amount per unit area of the first transparent printing layer.

In general, a transparent printing layer made of a lubricant-containing ink is likely to be whitened by shrinkage. This whitening is caused by the lubricant contained therein (especially when a wax component is included as a lubricant), and fine cracks occur in the printed layer due to shrinkage, and light is diffusely reflected at the cracked portions. It is presumed to be caused by such things.
In the present invention, when the heat-shrinkable cylindrical label 1 is attached to the container 9, the second transparent printing layer 32 is greatly shrunk, but the second transparent printing layer 32 has a small ink adhesion amount per unit area. In addition, the amount of lubricant per unit area is small, and cracking of the printed layer hardly occurs. For this reason, the second transparent printed layer 32 after shrinkage is less likely to be whitened. On the other hand, since the first transparent printing layer 31 has a large ink adhesion amount per unit area, in general, the first transparent printing layer 31 is likely to be whitened. However, in the present invention, the first region is attached in correspondence with the large-diameter portion 91. As a result, the shrinkage amount of the first transparent printing layer 31 is reduced, and the first transparent printing layer 31 is also hardly whitened. For the same reason, the third transparent printing layer 33 is also difficult to be whitened.
Therefore, according to the present invention, the heat-shrinkable cylindrical label 1 does not look partially whitish and can provide a labeled container 10 with a good appearance.
In the heat-shrinkable cylindrical label 1 of the present invention, after the heat shrinkage, all of the first to third transparent printing layers 31, 32, 33 may not be whitened or may be slightly whitened. There is also. According to the present invention, even when the first to third transparent printing layers 31, 32, 33 are slightly whitened, the degree of whitening is almost the same between the first to third transparent printing layers 31, 32, 33. As a result, it is possible to provide a labeled container 10 that is not noticeably whitened as a whole and has a good appearance.

In addition, the heat-shrinkable cylindrical label 1 after heat shrink is such that the ink adhesion amount per unit area of the first transparent print layer 31, the second transparent print layer 32, and the third transparent print layer 33 is approximated. Become. For example, as shown in FIG. 9, it is also possible to obtain a labeled container 10 having a second transparent printed layer 32 and a third transparent printed layer 33 having a thickness substantially the same as the thickness of the first transparent printed layer 31 after shrinkage. it can.
In the labeled container 10 of the present invention, the outer surface of the heat-shrinkable cylindrical label 1 after heat shrinkage is composed of first to third transparent printing layers 31, 32, and 33 that have a large ink adhesion amount per unit area. Therefore, it becomes difficult to get scratched.

[Modification]
The labeled container and the heat-shrinkable cylindrical label of the present invention are not limited to the above-described embodiment, and can be appropriately changed, replaced, or substituted within the scope intended by the present invention.
Hereinafter, modifications of the present invention will be described. In the description, configurations and effects different from those of the above-described embodiment will be mainly described, and configurations similar to those of the above-described embodiment will be described (assuming that). Terms or symbols may be used as they are, and description of the configuration may be omitted.

In the said embodiment, although the 1st thru | or 3rd transparent printing layers 31, 32, and 33 are provided in the vertical direction from the upper edge to the lower edge of the cylindrical film 2 without gap, for example, it shows in FIG. As described above, the transparent printing layer is not provided between the first transparent printing layer 31 and the third transparent printing layer 33 and / or between the third transparent printing layer 33 and the second transparent printing layer 32. The region A may be included. In FIG. 10, the first transparent printed layer 31 is shaded, the second transparent printed layer 32 is shaded, and the third transparent printed layer 33 is numberlessly dotted.
Although not particularly shown, a transparent printing layer is formed on the upper end portion of the tubular film 2 including the upper edge of the tubular film 2 and / or the lower end portion of the tubular film 2 including the lower edge of the tubular film 2. You may have the area | region which is not provided.

  Furthermore, in the said embodiment, although the 1st thru | or 3rd transparent printing layers 31, 32, 33 are each provided in the cylindrical film 2 for every area | region, the 1st thru | or 3rd transparent printing layers 31, 32, At least one transparent printing layer selected from 33 may be provided in two or more independent regions in the longitudinal direction of the tubular film 2.

Furthermore, in the said embodiment, although the 1st thru | or 3rd transparent printing layers 31, 32, 33 are formed using the same lubricant ink, it selects from the 1st thru | or 3rd transparent printing layers 31, 32, 33. The at least two transparent printing layers may be formed using different lubricant-containing inks.
For example, the first transparent printing layer 31 and the second transparent printing layer 32 are formed with different lubricant-containing inks. In this case, a lubricant-containing ink capable of forming a relatively flexible printing layer is used as the ink for forming the second transparent printing layer 32, and a printing layer harder than that is formed as the ink for forming the first transparent printing layer 31. It is preferable to use a lubricant-containing ink that can be used. For example, as the ink for forming the second transparent printing layer 32, a lubricant-containing ink using a polyurethane-based resin as a binder resin is used, and as the ink for forming the first transparent printing layer 31, a lubricant-containing agent using an acrylic resin as a binder resin. Use ink. When the heat-shrinkable cylindrical label 1 is thermally shrunk, the frequency of occurrence of fine cracks in the printed layer is reduced by forming the first transparent printed layer 31 that shrinks relatively greatly with a relatively soft lubricant ink. it can.

  Moreover, in the said embodiment, although the 3rd transparent printing layer 33 is provided in the cylindrical film 2, the heat-shrinkable cylindrical label 1 of this invention does not need to be provided with the 3rd transparent printing layer. .

Generally, when a design printing layer is provided on the back surface of a transparent film and a transparent printing layer is provided on the surface of the transparent film, the interference color may be visually recognized from the transparent printing layer side. This is because both the transparent printing layer and the transparent film are thin layers, and light incident from the outside is reflected and interferes between the transparent printing layer and the film. In particular, when the thickness of the transparent printing layer is not uniform, various interference colors are generated, and the appearance looks like iridescent. This interference color is more emphasized in combination with the color of the design print layer provided on the back surface of the transparent film. For example, in a region where a dark design print layer (low brightness design print layer) such as black is provided, when viewed from the outside of the film through the transparent print layer, an iridescent color is likely to occur.
In this respect, the interference color can be suppressed by relatively increasing the thickness of the transparent printing layer.
In the present invention, the heat-shrinkable cylindrical label 1 after heat shrinkage mounted on the deposition region of the container 9 has the first transparent printing layer 31, the second transparent printing layer 32, and the third transparent printing layer 33, respectively. Although the ink adhesion amount per unit area is approximated, the thickness of the first transparent printing layer 31 tends to be the largest even after heat shrinkage (note that this is not necessarily the case). . Since a transparent printing layer having a relatively large thickness is less likely to generate interference colors as described above, in the present invention, when a dark design print layer is provided on the cylindrical film 2, the dark design print layer is provided. Is preferably provided corresponding to the first transparent printing layer 31.

DESCRIPTION OF SYMBOLS 1 Heat-shrinkable cylindrical label 2 Cylindrical film 31 1st transparent printed layer 32 2nd transparent printed layer 33 3rd transparent printed layer 9 Container 91 Large diameter part 92 Small diameter part 93 Reduced diameter part 10 Labeled container

Claims (7)

A cylindrical film that thermally shrinks in the circumferential direction, a first transparent printing layer provided on the outer surface of the cylindrical film, and a second transparent printing layer that has a smaller ink adhesion amount per unit area than the first transparent printing layer A heat-shrinkable cylindrical label having a second transparent printed layer having an ink adhesion area per unit area of 10% to 30% ,
A container having a deposition area to which the heat-shrinkable cylindrical label is attached,
The deposition area of the container has a large diameter portion and a small diameter portion,
The first transparent printing layer and the second transparent printing layer are both colorless and transparent printing layers,
The heat-shrinkable cylindrical label is formed so that a region provided with the first transparent printing layer corresponds to the large diameter portion and a region provided with the second transparent printing layer corresponds to the small diameter portion. A labeled container that is heat-shrinkable into the container.   The labeled container according to claim 1, wherein each of the first transparent printing layer and the second transparent printing layer is formed from a medium ink containing a lubricant.   The labeled container according to claim 2, wherein the lubricant comprises a granular lubricant. The ratio represented by the following formula of the ink adhesion amount per unit area of each of the first transparent printing layer and the second transparent printing layer shrunk following the thermal shrinkage of the tubular film is 0.20-0. 4. The labeled container according to claim 1, which is .99.
Formula: Ink adhesion amount per unit area of the second transparent printing layer / ink adhesion amount per unit area of the first transparent printing layer. A tubular film that thermally shrinks in the circumferential direction;
A first transparent printing layer provided in a first region of the outer surface of the tubular film;
Have a, a second transparent printing layer ink deposition amount is small per unit area than the second provided in a region and the first transparent printing layer which is shifted in the vertical direction with respect to the first region of the tubular film ,
The first transparent printing layer and the second transparent printing layer are both colorless and transparent printing layers,
The heat-shrinkable cylindrical label whose ink adhesion area per unit area of a said 2nd transparent printing layer is 10%-30% . A third transparent printing layer provided between the first region and the second region on the outer surface of the tubular film;
The heat-shrinkable cylindrical label according to claim 5, wherein an amount of ink attached per unit area of the third transparent printing layer is smaller than that of the first transparent printing layer and larger than that of the second transparent printing layer.   The heat-shrinkable cylindrical label according to claim 6, wherein an ink adhesion amount per unit area of the third transparent printing layer is gradually reduced from the first transparent printing layer side toward the second transparent printing layer side. .

Images