JP6097925B2 - Heat-shrinkable cylindrical label and package - Google Patents

Description

The present invention relates to a heat-shrinkable cylindrical label having a so-called wrinkle-like appearance in which multiple rows of wrinkles are formed by heat shrinkage , and a packaging body on which the heat-shrinkable cylindrical label is mounted .

Conventionally, a heat-shrinkable cylindrical label that produces a wrinkle-like appearance by heat shrinkage is attached to a beverage container or the like.
Here, a heat-shrinkable cylindrical label that produces a so-called wrinkle-like appearance by heat shrinkage shrinks in the circumferential direction when heat is applied, and a plurality of rows of wrinkles are generated on the outer surface or the inner surface along with the shrinkage. It is a heat-shrinkable cylindrical label that exhibits a unique appearance and texture due to the wrinkles.
Such a heat-shrinkable cylindrical label is used, for example, as a cap seal for a container containing sake.

In Patent Document 1, a uniaxially stretched heat-shrinkable film and a biaxially stretched non-heat-shrinkable film having a metal thin film are integrated by a plurality of lines of line-shaped adhesive, and line-shaped bonded portions and non-bonded portions are integrated. Are alternately arranged, the width of the bonded portion is 0.6 to 4 mm, the ratio of the bonded portion to the non-bonded portion is 1: 3 to 3: 2, and the repeating unit of the bonded portion and the non-bonded portion is 2 to 16 mm. Certain heat shrinkable packaging films are disclosed.
When a heat-shrinkable cylindrical label made of such a heat-shrinkable packaging film is externally fitted to the cap portion of the container and is heat-shrinked, the upper region of the heat-shrinkable cylindrical label is bent to the upper surface side of the cap portion. At the same time, the region other than the upper region of the heat-shrinkable cylindrical label is in close contact with the outer peripheral surface of the cap portion and the body portion of the container. At this time, while the heat-shrinkable film corresponding to the non-adhesive part is thermally shrunk, the non-heat-shrinkable film corresponding to the non-adhesive part is not shrunk. A large number of ridges extending in the direction are generated.

However, the heat-shrinkable cylindrical label of Patent Document 1 is a heat-shrinkable packaging film in which a uniaxially stretched heat-shrinkable film and a biaxially stretched non-heat-shrinkable film are partially bonded at a plurality of rows of bonded portions. Since it is used, wrinkles often occur in the circumferential direction or oblique direction. In addition, although both said ridge and said ridge mean the state which protruded in convex shape, in this specification, a ridge | base is a long extended in the up-down direction scheduled by heat contraction which becomes the basis of a wrinkle-like appearance. It means a convex shape, and 皺 means a convex shape that occurs in an unplanned disordered direction.
In particular, when a polyethylene terephthalate film is used as the uniaxially stretched heat-shrinkable film of Patent Document 1, the biaxially stretched non-heat-shrinkable film partially adhered thereto is randomly pulled because it shrinks rapidly at a certain temperature. As a result, the wrinkles are likely to occur.
In addition, when the heat-shrinkable cylindrical label of Patent Document 1 is used as a cap seal, the shrinkage of the uniaxially stretched heat-shrinkable film part adhered to the biaxially stretched non-heat-shrinkable film during heating is regulated. Therefore, it is difficult to bend the upper region of the heat-shrinkable cylindrical label so as to be in close contact with the upper surface of the cap portion, and a large gap is generated between the upper edge of the heat-shrinkable cylindrical label and the upper surface of the cap portion. When such a gap is generated, there is a problem that dust accumulates between the heat-shrinkable cylindrical label and the cap portion, or foreign matter is caught on the upper edge of the heat-shrinkable cylindrical label during conveyance.
Furthermore, since the heat-shrinkable cylindrical label of Patent Document 1 uses a heat-shrinkable packaging film in which a uniaxially stretched heat-shrinkable film and a biaxially stretched non-heat-shrinkable film are partially bonded, There is also a problem that it is difficult to divide when opened.

JP 2003-246003 A

An object of the present invention is to produce a beautiful wrinkle-like appearance by heat shrinkage, and when used as a cap seal, a heat-shrinkable tubular label that can be attached in close contact with the upper surface of the cap portion , and a heat-shrinkable tubular shape It is to provide a package with a label attached .

The heat-shrinkable cylindrical label of the present invention includes a tubular film that is heat-shrinkable in the circumferential direction, and a shrinkage restriction that causes a convex bulge in the tubular film by restricting the heat shrinkage of the tubular film. includes a part, the said contraction regulating portion is provided so as to extend in the vertical direction of the plurality of columns provided and the tubular film in a circumferential direction of the tubular film, shrink regulating portion of said plurality of rows, said tube Provided in at least an intermediate region excluding an upper region of the film-like film , wherein the plurality of rows of shrinkage restricting portions include at least one resin selected from a reactive curable resin, an electron beam curable resin, and an ultraviolet curable resin. Contains

Since the heat-shrinkable cylindrical label of the present invention is provided with a plurality of lines of linear shrinkage restricting portions extending in the vertical direction, the film portion corresponding to the shrinkage restricting portion does not substantially heat shrink during heating or While the film shrinks small, the film portion between the adjacent shrinkage restricting parts heat-shrinks so that it rises in a convex shape. Accordingly, heat shrinkage causes multiple rows of wrinkles in the circumferential direction, resulting in a beautiful wrinkle-like appearance.
Furthermore, the heat-shrinkable cylindrical label of the present invention is not provided with a shrinkage restricting portion in the upper region of the tubular film, so that the entire upper region can be heat-shrinked substantially uniformly in the circumferential direction. For this reason, when the heat-shrinkable cylindrical label of the present invention is used as a cap seal, the upper region of the heat-shrinkable cylindrical label can be brought into close contact with the upper surface of the cap portion.
Moreover, since the heat-shrinkable cylindrical label of the present invention does not use a film in which two films are partially bonded as in the prior art, it is not difficult to open.
In a preferred heat-shrinkable cylindrical label of the present invention, perforations are formed in the circumferential direction in the plane of the tubular film, and the perforation through-hole crosses a part or all of the shrinkage restricting portion. It is formed to do.
Such a preferable heat-shrinkable cylindrical label is formed so that the perforation hole extending in the circumferential direction crosses part or all of the shrinkage restricting portion, so that the film is divided using the perforation. At this time, the dividing line is difficult to deviate in the vertical direction, and is easily divided in the circumferential direction along the perforation.

According to another aspect of the present invention, a package is provided.
The package of the present invention has a container having a cap part and a body part, and a heat-shrinkable cylindrical label attached to the container, and the heat-shrinkable cylindrical label can be heat-shrinkable in the circumferential direction. A cylindrical shrinkage restricting portion provided in a plurality of rows in the circumferential direction of the tubular film and extending in the vertical direction of the tubular film. Is formed in at least an intermediate region excluding the upper region of the tubular film, and a ridge that is a convex bulge extending in the vertical direction of the tubular film is formed in the region of the tubular film where the shrinkage restricting portion is provided. In addition, the upper region of the tubular film is bent toward the upper surface of the cap portion.
In a preferred package of the present invention, the cylindrical film has a transparent base film having heat shrinkability and a design printing layer provided on the inner surface of the base film, and the design printing layer has a metallic luster. The plurality of rows of shrinkage restricting portions are transparent and provided on the outer surface of the tubular film.

The heat-shrinkable cylindrical label of the present invention is less likely to wrinkle when heat-shrinked and produces a beautiful wrinkle-like appearance. Furthermore, when the heat-shrinkable cylindrical label of the present invention is used as a cap seal, the upper region thereof can be attached to the upper surface of the cap portion. For this reason, it is possible to prevent dust from accumulating between the heat-shrinkable cylindrical label and the cap portion, or to prevent foreign matter from being caught on the upper edge of the heat-shrinkable cylindrical label during conveyance.
Moreover, the heat-shrinkable cylindrical label of the present invention can be easily opened along the perforation.
The package of the present invention is provided with a heat-shrinkable cylindrical label that is less likely to cause wrinkles and bends toward the surface of the cap part when heat-shrinked, and exhibits a beautiful wrinkle-like appearance, It is possible to prevent dust from accumulating between the cylindrical label and the cap portion, or to prevent foreign matter from being caught on the upper edge of the heat-shrinkable cylindrical label during conveyance.
Further, in the package of the present invention, the design printing layer provided on the inner surface of the base film is formed from an ink having a metallic luster, and several rows of shrinkage restricting portions are transparent and provided on the outer surface of the tubular film. Therefore, the glittering feeling changes depending on the viewing angle.

The front view of the heat-shrinkable cylindrical label which concerns on one embodiment of this invention. However, the heat-shrinkable cylindrical label is expressed in a flat state. The rear view. FIG. The principal part expanded sectional view cut | disconnected by the IV-IV line (circumferential direction) of FIG. The principal part expanded sectional view cut | disconnected by the VV line | wire (circumferential direction) of FIG. The front view which expanded a part of intermediate region of the heat-shrinkable cylindrical label of FIG. The lower part omission front view about the package which mounted | wore the adherend with the heat-shrinkable cylindrical label. Sectional drawing cut | disconnected by the VIII-VIII line (up-down direction) of FIG. The principal part expanded sectional view cut | disconnected by the IX-IX line (circumferential direction) of FIG. The front view of the heat-shrinkable cylindrical label which concerns on the modification of this invention. The principal part expanded sectional view which cut | disconnected the heat-shrinkable cylindrical label which concerns on the further modification of this invention in the circumferential direction (location similar to the VV line of FIG. 1). The principal part expanded sectional view which cut | disconnected the heat-shrinkable cylindrical label which concerns on the further modification of this invention in the circumferential direction (location similar to the VV line of FIG. 1). The principal part expanded sectional view which cut | disconnected the heat-shrinkable cylindrical label which concerns on the further modification of this invention in the circumferential direction (location similar to the VV line of FIG. 1). The front view of the package which concerns on the to-be-adhered body with the heat-shrinkable cylindrical label of this invention mounted | worn.

The present invention will be described below with reference to the drawings as appropriate.
In the following description, “inner surface” refers to a surface closer to the adherend when it is assumed that the heat-shrinkable cylindrical label is attached to the adherend, and “outer surface” refers to the opposite side. Point to the surface. The “circumferential direction” is a direction around the axis of the heat-shrinkable cylindrical label, and the “vertical direction” is a direction parallel to the axis of the heat-shrinkable cylindrical label and is orthogonal to the circumferential direction. Direction.
Further, in this specification, the description “PPP to QQQ” means “PPP or more and QQQ or less”.
It should be noted that the specific dimensions and scale ratios of each figure are different from the actual ones.

1 to 6, the heat-shrinkable cylindrical label 1 of the present invention includes a tubular film 2 that can be thermally shrunk in the circumferential direction, and a linear shrinkage restricting portion 3 provided in the plane of the tubular film 2. And having.
The shrinkage restricting portion 3 is formed by attaching a shrinkage restricting portion forming material to the tubular film 2.
The shrinkage restricting portion 3 is a portion that does not substantially heat shrink at the heat shrinking temperature, or a portion that has a smaller heat shrinkage rate than the heat shrinkage of the tubular film 2 even when heat shrinking.
The heat shrink temperature means the temperature of the outer surface of the heat shrinkable cylindrical label 1 or the temperature of the heating medium when the heat shrinkable tubular label 1 is heat shrunk. The temperature of the outer surface of the heat-shrinkable cylindrical label 1 is usually an arbitrary temperature within the range of 70 ° C. to 100 ° C., and the temperature of the heating medium (for example, when hot air is used) is usually 100 ° C. Any temperature within the range of ~ 250 ° C.

The linear shrinkage restricting portions 3 are provided on the outer surface of the tubular film 2 and are provided in a plurality of rows in the circumferential direction of the tubular film 2.
Therefore, in the surface of the tubular film 2, the line-shaped shrinkage restricting portions 3 extending in the vertical direction and the line-shaped film exposed portions 2a extending in the vertical direction are alternately arranged in the circumferential direction.
Since the shrinkage restricting portion 3 is not provided in the film exposed portion 2a, the film exposed portion 2a shrinks in the circumferential direction due to the heat shrinkability of the heat shrinkable film 4 when heated to a heat shrink temperature by a heating medium.
On the other hand, the film portion corresponding to the shrinkage restricting portion 3 (the portion of the tubular film 2 on which the shrinkage restricting portion 3 overlaps) is contracted by the shrinkage restricting portion 3 at the heat shrinkage temperature. By restricting, heat shrinkage does not substantially occur or even when heat shrinks, the film exposure portion 2a does not shrink more than the heat shrinkage.

  One of the features of the present invention is that the tubular film 2 is substantially composed of one heat-shrinkable film 4. The substantially single heat-shrinkable film 4 includes not only a single layer film but also a laminated film having two or more layers. However, the laminated film having two or more layers is a laminated film having a plurality of non-adhesive portions such that one layer and the other layer are bonded via an adhesive portion and a non-adhesive portion as in Patent Document 1. It is not a structure. The laminated film of two or more layers in the present invention is a laminated film obtained by laminating a plurality of same or different kinds of films using various laminating means (for example, coextrusion method, laminating method), or one or more same or different films It is a laminated film in which different types of films and functional layers are laminated using various lamination means (for example, coextrusion method, lamination method).

Another feature of the present invention is that the shrinkage restricting portion 3 is not provided in the upper region A of the tubular film 2.
The upper region A of the tubular film 2 is a region having a predetermined length downward from the upper edge 2b of the tubular film 2, as shown in FIGS. 1 and 2, and the upper region A is a heat-shrinkable tubular shape. When the label 1 is attached to the adherend, it is a region including a bent portion that bends inward.
This will be specifically described below.

The heat-shrinkable cylindrical label 1 is a tubular body in which a plurality of linear shrinkage restricting portions 3 are provided in the circumferential direction on the outer surface of a tubular film 2 that can be thermally shrunk in the circumferential direction.
1 to 6, the heat-shrinkable cylindrical label 1 is shown in a flat state.

The tubular film 2 is formed by rolling the heat-shrinkable film 4 into a tubular shape so that the heat-shrinkable direction of the heat-shrinkable film 4 is the circumferential direction, and overlapping and adhering both side ends 4a and 4b. Has been. The portion 5 in which the side end portions 4a and 4b are overlapped and bonded is usually called a center seal portion.
1 and 2, reference numeral 21 denotes a knob that extends upward from a part of the upper edge 2 b of the tubular film 2.
Such a cylindrical film 2 can be greatly contracted at least in the circumferential direction by heating.
The heat-shrinkable film 4 has a heat-shrinkable base film 41 and a design print layer 42 provided on the base film 41. However, the design print layer 42 is provided as necessary.

The base film 41 is not particularly limited as long as it has heat shrinkability in at least one direction.
The base film 41 is preferably a film having a heat shrinkage rate of 30% or more in one direction when heated to 80 ° C. (main heat shrinkage direction; circumferential direction when it becomes a tubular film), and further 40% of the same. The above film is more preferable, and the film of 50% or more is particularly preferable. The base film 41 may be a film that can be thermally shrunk in other directions. The other direction refers to a direction orthogonal to the one direction in the plane of the base film 41. In this case, the base film 41 is preferably a film having a heat shrinkage rate of 1 to 15% in the other direction when heated to 80 ° C., and more preferably a film having the same 1 to 10%.

Here, the heat shrinkage ratio when heated to 80 ° C. means the length of the film before heating (original length) and the length of the film after dipping the film in warm water at 80 ° C. for 10 seconds. It is the ratio of (length after immersion), and is obtained by substituting into the following formula (1).
Formula (1): thermal 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 base film 41 is not particularly limited. For example, polyester resins such as polyethylene terephthalate and polylactic acid, olefin resins such as polypropylene, styrene resins such as polystyrene and styrene-butadiene copolymers, cyclic olefin resins, Examples thereof include synthetic resin films made of one kind selected from thermoplastic resins such as vinyl chloride resins, or a mixture of two or more kinds. In addition, as the base film 41, a laminated film in which two or more kinds of films having heat shrinkability are laminated using various lamination means, or a functional layer is laminated on the film having heat shrinkability using various lamination means. A laminated film or the like can also be used.
Examples of the functional layer include metal foils (including metal vapor deposition films) such as aluminum foil, Japanese paper, non-woven fabric, and foamed resin layers. The functional layer is preferably one that relatively easily follows the heat shrinkage of a film having heat shrinkability.

As the base film 41, it is preferable to use a styrene film such as polystyrene or a styrene-butadiene copolymer and a laminated film having this film. Since such a film has a relatively gentle shrinkage curve, the heat-shrinkable cylindrical label 1 can be easily heat-shrinked uniformly, and a good wrinkle-like appearance can be produced.
Although the thickness of the base film 41 is not specifically limited, Generally, it is 20 micrometers-150 micrometers, Preferably it is 30 micrometers-100 micrometers.

  The design print layer 42 is provided on at least one of the inner surface and the outer surface of the base film 41. In the illustrated example, the design print layer 42 is provided on the inner surface of the transparent base film 41. However, although not particularly illustrated, the design print layer 42 may be provided on the outer surface of the opaque or transparent base film 41, or may be provided on both the outer surface and the inner surface of the base film 41.

  The design print layer 42 is, for example, an ink layer representing a design such as a product name, a company name, an explanatory note, a design, or the like, or a background ink layer having a single color or a multicolor pattern without a specific design. The design print layer 42 may be one ink layer selected from the ink layers, or may be an ink layer in which a plurality of layers are overcoated. The design printing layer 42 can be provided by a known printing method, and a typical printing method includes a gravure printing method.

The design print layer 42 may be provided in a solid form on the entire surface of the base film 41 or may be partially provided in a desired region within the surface. However, in order to increase the adhesive strength of the center seal portion 5, the design print layer 42 may not be interposed between the side end portions 4 a and 4 b of the center seal portion 5 as shown in FIGS. 4 and 5. preferable.
The ink for forming the design print layer 42 is not particularly limited, and examples thereof include solvent-drying inks such as a solvent type. Since the heat-shrinkable cylindrical label 1 has a more brilliant appearance, the ink for the design print layer 42 is a colorant that is relatively easy to reflect light such as silver, gold, or yellow, and fine metal particles or silica. It is preferable to use an ink having a metallic luster such as an ink containing fine particles that can reflect or diffuse light such as fine particles.

  For example, the heat-shrinkable cylindrical label 1 having a metallic luster can be formed by providing the design printing layer 42 for silver solid printing.

  The thickness of the design print layer 42 is not particularly limited. Since the design printing layer 42 itself is relatively soft, the design printing layer 42 does not regulate the heat shrinkage of the heat shrinkable film 4. However, if the design print layer 42 is too thick, the overall heat shrinkage rate of the heat shrinkable film 4 may be reduced. Therefore, the thickness of the design printing layer 42 is preferably about 0.2 μm to 10 μm, and more preferably 1 μm to 5 μm.

A plurality of shrinkage restricting portions 3 extending linearly are provided on the outer surface of the tubular film 2. Preferably, the contraction restricting portion 3 is linear.
The linear shrinkage restricting portion 3 extends in a direction substantially parallel to the vertical direction of the tubular film 2. The linear shrinkage restricting portions 3 are arranged in the circumferential direction with a predetermined interval (a plurality of rows are provided in the circumferential direction).
The shrinkage restricting portion 3 is provided on the outer surface of the tubular film 2 except for the upper region A and the lower region C of the tubular film 2. That is, the shrinkage restricting portion 3 is provided in the vertical intermediate region B on the outer surface of the tubular film 2. But the shrinkage | contraction regulation part 3 may be provided until it reaches the lower edge 2c of the cylindrical film 2 on the condition that it is not provided in the upper area | region A of the cylindrical film 2. FIG.
The upper region A and the lower region C of the tubular film 2 where the shrinkage restricting portion 3 is not provided are thermally contracted in the circumferential direction due to the heat shrinkability of the heat shrinkable film 4 at the heat shrink temperature.

The upper region A of the tubular film 2 that does not have the shrinkage restricting portion 3 is a region including a bent portion that bends inward when the heat-shrinkable tubular label 1 is attached to the adherend.
The range of the upper region A that does not have the shrinkage restricting portion 3 is appropriately set according to the adherend. For example, the vertical length of the upper region A is about 3 mm to 10 mm downward from the upper edge 2 b of the tubular film 2.
Further, the lower region C of the tubular film 2 that does not have the shrinkage restricting portion 3 inevitably occurs when one heat-shrinkable tubular label 1 is obtained from the tubular label continuous body, as will be described later. It is. For this reason, the range of the lower region C that does not have the shrinkage restricting portion 3 is not particularly limited, but is usually a range from the lower edge 2c of the tubular film 2 to 1 mm to 3 mm above.
However, by not providing the shrinkage restricting portion 3 in the lower region C, a bent portion that bends to the lower surface of the adherend may be formed. In this case, the vertical length of the lower region C is, for example, about 3 to 10 mm upward from the lower edge 2c of the tubular film 2. Thus, when the heat-shrinkable cylindrical label 1 having the lower region C where the shrinkage restricting portion 3 is not provided is heat-shrinked, the lower region C is bent at the peripheral portion of the lower surface of the adherend. Therefore, it is possible to attach the heat-shrinkable cylindrical label 1 with the bent portion, which is the bent lower region C, being in close contact with the lower surface of the adherend.

The vertical length of the shrinkage restricting portion 3 (the straight length from the upper edge to the lower edge of the shrinkage restricting portion 3) can be set as appropriate according to the vertical length of the tubular film 2.
The widths W1 of the plurality of rows of shrinkage restricting portions 3 may be substantially the same width or may be different. The width W1 of the shrinkage restricting portion 3 is a length in the circumferential direction as shown in FIG.
In order to generate wrinkles that are aligned in the circumferential direction, it is preferable that the plurality of rows of shrinkage restricting portions 3 have substantially the same width. In particular, it is particularly preferable that a plurality of rows of shrinkage restricting portions 3 having substantially the same width are regularly provided at regular intervals in the circumferential direction.
As a specific example of the width W1 of the shrinkage restricting portion 3, about 0.6 mm to 4.0 mm can be exemplified.

Between the row | line | columns of the some shrinkage | contraction regulation part 3, the linear film exposure part 2a extended in the up-down direction which is the part which the cylindrical film 2 exposed is present. There are a plurality of rows of film exposure portions 2 a corresponding to the number of shrinkage restricting portions 3.
The widths W2 of the plurality of rows of film exposed portions 2a may be substantially the same width or different. In order to generate wrinkles that are aligned in the circumferential direction, it is preferable that the plurality of rows of exposed film portions 2a have substantially the same width. In addition, the width W2 of the film exposure part 2a is the length in the circumferential direction, as shown in FIG.
As a specific example of the width W2 of the film exposure part 2a, about 0.4 mm-12.0 mm can be illustrated.
The ratio of the width W1 of the shrinkage restricting portion 3 to the width W2 of the film exposed portion 2a (the width W1 of the shrinkage restricting portion 3: the width W2 of the film exposed portion 2a) is not particularly limited. : About 2 is preferable.

The shrinkage restricting portion 3 is substantially not thermally shrunk at a heat shrinkage temperature (for example, a temperature at which the shrinkage restricting portion 3 is 80 ° C.) or is not shrunk more than the heat shrinkage of the film exposed portion 2a even if heat shrinks. Consists of.
The base film 41 to which the shrinkage restricting portion 3 is attached includes a film having a heat shrinkage rate of 10% or less in all directions in the plane, preferably the heat shrinkage rate is 5% or less, more preferably 3 % Or less is included. The heat shrinkage rate of the base film 41 to which the shrinkage restricting portion 3 is attached is measured with respect to the heat shrinkage rate of the base film 41 in a state where the shrinkage restricting portion 3 is attached to the entire one surface of the base film 41 in a solid shape. It is obtained in the same manner as the method. The thermal shrinkage rate of the base film 41 to which the shrinkage restricting portion 3 is attached indicates the degree of shrinkage restriction of the shrinkage restricting portion 3.

The shrinkage restricting portion 3 includes a solidified layer containing a resin component as a main component. The main component means a component having the largest mass among the components constituting the shrinkage restricting portion 3.
The said resin component is not specifically limited, Well-known resin, such as a thermoplastic resin, a photocurable resin, and a thermosetting resin, is mentioned.
In addition, the shrinkage restricting portion 3 may contain any additive as necessary, or may contain a colorant. However, the shrinkage restricting portion 3 is preferably a transparent one containing no colorant.

The shrinkage restricting portion 3 can be formed by coating the resin composition in a linear shape on the outer surface of the tubular film 2 and solidifying it. Arbitrary additives etc. may be mix | blended with the said resin composition as needed.
For example, the properties of the resin composition include a solvent type and an emulsion type. When the resin composition is classified according to the curing principle of the resin component, an ultraviolet curable type, an electron beam (EB) curable type, a reactive type, a thermosetting type, a two-component mixed type, and the like can be given. The resin composition is selected from a reactive curable resin, an electron beam curable resin, and an ultraviolet curable resin because it is used for general purposes and can form a relatively hard coating film (shrinkage restricting portion 3). It is preferable to use at least one, and it is more preferable to use an ultraviolet curable resin that does not contain a colorant.

Examples of the reactive curable resin composition include a reactive hot melt adhesive mainly composed of a urethane resin.
Examples of the composition of the electron beam curable resin include those containing at least one of a monomer, an oligomer, and a prepolymer that can be radically polymerized or cationically polymerized by electron beam irradiation. The composition of the electron beam curable resin may contain additives such as a sensitizer and a lubricant, and a colorant such as a pigment, if necessary.
Examples of the composition of the ultraviolet curable resin include a resin component such as a photopolymerizable oligomer (prepolymer) or a photopolymerizable monomer, and a photopolymerization initiator. The composition of this ultraviolet curable resin may contain additives such as sensitizers and lubricants, and colorants such as pigments, if necessary.
Examples of the ultraviolet curable resin include a cationic polymerizable compound having an epoxy group or a vinyl ether group, and a radical polymerizable compound having an acryloyl group or a vinyl group. For example, examples of the cationic polymerizable compound include an epoxy compound, a vinyl ether compound, and an oxetane compound. Examples of the radical polymerizable compound include a urethane acrylate-based, epoxy acrylate-based, ester acrylate-based, and acrylate-based compound. It is done.
Examples of the photopolymerization initiator corresponding to the ultraviolet curable resin include photocationic polymerization initiators such as diazonium salts, triarylsulfonium salts, silanol / aluminum complexes, sulfonic acid esters, and imide sulfonates.
In addition, as a composition of the said various curable resin, a general purpose printing ink can be used, for example.

The resin composition can be applied by a conventionally known printing method such as a silk screen printing method, a flexographic printing method, a letterpress printing method, or a gravure printing method. By applying and solidifying the resin composition by these printing methods, it is possible to easily form a plurality of well-defined shrinkage restricting portions 3.
In particular, when a relatively thick coating film is formed by one printing or a small number of times of overprinting, it is preferable to form the shrinkage restricting portion 3 by a silk screen printing method, and a relatively hard and thin coating film is formed. When forming, it is preferable to form the shrinkage restricting portion 3 by a flexographic printing method.
The thickness of the shrinkage restricting portion 3 is not particularly limited. However, if the shrinkage restricting portion 3 is too thin, the shrinkage of the tubular film 2 may not be sufficiently restricted. Considering such points, the thickness of the shrinkage restricting portion 3 is preferably 1 μm or more, more preferably 3 μm or more, and particularly preferably 5 μm or more. Moreover, when the thickness of the shrinkage | contraction regulation part 3 is too thick, when winding a cylindrical label continuous body on a roll, there exists a possibility that blocking of films may arise or a film may become uneven | corrugated. Considering such points, the upper limit of the thickness of the shrinkage restricting portion 3 is normally 100 μm when it is formed by a printing method.
For example, when an ultraviolet curable resin is used as the material for forming the shrinkage restricting portion 3, the thickness is preferably 1 μm to 10 μm.
In the above description, the shrinkage restricting portion 3 is exemplified by forming and solidifying a resin composition by a conventionally known printing method. However, the method of forming the shrinkage restricting portion 3 is not limited to this, and for example, a metal It can also be formed by providing a layer in which the fine particles are dispersed on the outer surface of the heat-shrinkable film 4 by a transfer method such as a hot stamp method or a cold stamp method.
As shown in FIG. 5, the surface of the shrinkage restricting portion 3 has a planar shape substantially parallel to the outer surface of the heat shrinkable film 4.

An auxiliary perforation 6 extending in the vertical direction and an opening perforation 7 extending in the circumferential direction are provided in the plane of the tubular film 2.
As used herein, the term “perforation” refers to a set of through-holes in which through-holes penetrating through the inner and outer surfaces of the tubular film 2 are intermittently formed in one direction, such as a sewing needle stitch. means. Such a perforation has a non-penetrating portion (a film portion not subjected to a penetrating treatment) between adjacent through holes. Examples of the front view shape of one through hole include an elongated linear shape, a needle hole shape (circular hole or elliptical hole), and the like. Since the film is easily cut along the perforation, the shape of each through hole is preferably an elongated straight line.

The auxiliary perforations 6 are formed substantially in parallel with the vertical direction from the lower ends on both sides of the knob portion 21 of the tubular film 2 to the in-plane middle portion of the tubular film 2. In the illustrated example, the auxiliary perforations 6 are A pair of left and right is formed.
The auxiliary perforation 6 may be formed so as to overlap the shrinkage restricting portion 3 or may be formed on the film exposed portion 2a.
Since it becomes easy to cut a film along the auxiliary perforation 6, it is preferable that the auxiliary perforation 6 is formed in the film exposure part 2a, as shown in FIG.1 and FIG.2. However, the auxiliary perforation 6 can also be formed by being slightly inclined with respect to the vertical direction of the tubular film 2. In this case, the auxiliary perforation 6 formed on the film exposed portion 2 a has the shrinkage restricting portion 3. It may be formed to run vertically from above (not shown).

  The opening perforation 7 is formed in the entire circumferential direction of the tubular film 2, and a part of the opening perforation 7 is connected to the lower end of the auxiliary perforation 6. The opening perforation 7 is connected to the lower end of the auxiliary perforation 6 when the auxiliary perforation 6 is formed by a line in which the through holes and the non-through portions are gathered together, and the through holes and the non-through portions are provided. It means that the opening perforations 7 composed of a series of gathered lines substantially intersect.

  The opening perforation 7 may be formed so that the through hole 71 overlaps the shrinkage restricting portion 3 (the through hole 71 is formed so as to cross part or all of the width of the shrinkage restricting portion 3. Or the through-hole 71 may be formed in the film exposed portion 2a without overlapping the shrinkage restricting portion 3, or a part of the plurality of through-holes 71 constituting the opening perforation 7 The through-hole 71 may overlap the shrinkage restricting portion 3 and a part of the through-hole 71 may be formed in the film exposed portion 2a.

Preferably, as shown in FIG. 6, the opening perforation 7 is formed so that its through hole 71 crosses all or part of or most of the shrinkage restricting portion 3. In this case, as shown in FIG. 6, the film exposed portion 2a also has a through-hole in the opening perforation 7 (this through-hole does not overlap the shrinkage restricting portion 3 and is indicated by reference numeral 71a in FIG. ) May be formed, or there may be no through-hole formed only in the film exposed portion 2a (not shown).
FIG. 6 is an enlarged view of the intermediate region where the shrinkage restricting portion is provided as viewed from the front. In order to make the shrinkage restricting portion easy to understand, the shrinkage restricting portion 3 is shaded.

Most of the shrinkage restricting portions 3 traversed by the through holes 71 mean 80% or more and less than 100% of the shrinkage restricting portions 3 with respect to the number of all the shrinkage restricting portions 3 formed on the tubular film 2. This ratio (80% or more and less than 100%) is obtained by (number of shrinkage restricting portions 3 crossing through hole 71 / number of all shrinkage restricting portions 3 formed on tubular film 2) × 100. .
It may be difficult to accurately form the plurality of through holes 71 so as to overlap all the shrinkage restricting portions 3, and as described above, a part or all of most of the shrinkage restricting portions 3 are traversed. If it is the perforation 7 for opening which has the through-hole 71, a film can be cut off in the circumferential direction along the perforation.

If a perforation device that can form perforations with high accuracy is used, it is also possible to form the opening perforations 7 having through holes 71 that cross all or part of all the shrinkage restricting portions 3. .
In addition, in FIG. 6, the through-hole which crosses a part of shrinkage | contraction regulation part 3 is shown with the code | symbol 71b, and the through-hole which crosses the whole shrinkage | contraction regulation part 3 is shown with the code | symbol 71c.
In this case, although not particularly illustrated, it is more preferable to form the opening perforation 7 having a through hole that traverses all of the shrinkage restricting portions 3.

  The heat-shrinkable cylindrical label 1 is usually provided in the form of a continuous tubular label continuous in a long shape, and individual heat-shrinkable tubular labels 1 are cut out from the continuous body in use. That is, when the heat-shrinkable cylindrical label 1 of the present invention is mechanically manufactured, after providing a plurality of rows of shrinkage restricting portions 3 extending in the longitudinal direction of the long heat-shrinkable film 4, The cylindrical label continuous body is obtained by adhering both end portions 4a and 4b while making it cylindrical, and making it flat. The cylindrical label continuous body is once wound around a roll, and the cylindrical label continuous body wound around the roll is loaded into a labeler (label mounting apparatus) or a label cutting apparatus. In a labeler or label cutting device, one perforated cylindrical label is formed by forming the auxiliary perforation 6 and the opening perforation 7 in the cylindrical label continuous body and cutting the cylindrical label continuous body into a predetermined length. 1 is formed, and this is heat shrink-fitted to the adherend.

When cutting the cylindrical label continuous body with a labeler or a label cutting device, if the cylindrical label continuous body is cut along the planned cutting line that coincides with the lower edge of the shrinkage restricting portion 3, the upper region A of the cylindrical film 2 is obtained. The heat-shrinkable tubular label 1 in which the shrinkage restricting portion 3 is provided up to the lower edge 2c of the tubular film 2 is obtained. However, since it is usually difficult to accurately cut the continuous cylindrical label continuous body so as to coincide with the lower edge of the shrinkage restricting portion 3, the lower edge of the shrinkage restricting portion 3. Cut along the planned cutting line slightly away from
In consideration of such a mechanical manufacturing process, the heat-shrinkable cylindrical label 1 does not have the shrinkage restricting portion 3 reaching the lower edge 2c of the tubular film 2.

The heat-shrinkable cylindrical label 1 of the present invention is heat-shrinkable and attached to the adherend by heating after being externally fitted to the desired adherend, as in the prior art.
The adherend is not particularly limited, and examples thereof include containers in which arbitrary products such as beverages, seasonings, foods, cosmetics, and sanitary products are stored, packaging boxes in which these products are stored, and arbitrary molded articles. .
In particular, the heat-shrinkable cylindrical label 1 of the present invention is suitable for use as a cap seal that is mounted including the cap portion of the adherend so as to protect the cap portion.

  The heat-shrinkable cylindrical label 1 of the present invention is mounted around the cap portion 91 and the trunk portion 92 of an adherend 9 such as a container and heated to a heat-shrink temperature using a heating medium such as steam or hot air. Then, as shown in FIGS. 7 and 8, the tubular film 2 is thermally contracted, so that the tubular film 2 is in close contact with the body portion 92, the upper region A of the tubular film 2 is bent, and the bent portion is the cap portion 91. Adheres to the upper surface 91a.

In the heat-shrinkable cylindrical label 1 of the present invention, the film portion corresponding to the shrinkage restricting portion 3 does not substantially heat shrink during heating (or the amount is small even if heat shrinks), while the adjacent shrinkage restriction. When the film part between the parts 3 (film exposure part 2a) heat-shrinks greatly, the film part provided with the shrinkage restricting part 3 is raised in a convex shape (see FIG. 9). Therefore, in the heat-shrinkable cylindrical label 1 after heat shrinkage, a plurality of long convex ridges extending in the vertical direction are formed in the circumferential direction, and a beautiful wrinkle-like appearance is produced.
In addition, when the heat-shrinkable cylindrical label 1 is heat-shrinked, a chaotic crack is generated in a part of the film portion bulged in the convex shape within the surface of the shrinkage restricting portion 3 provided in the film portion ( Not shown). When a crack as described above occurs in a part of the shrinkage restricting portion 3, the refractive index of light passing through the shrinkage restricting portion 3 is not uniform in the plane. For this reason, the direction of the light reflected from the surface of the film portion raised in a convex shape or the design printing layer 42 is changed, and the heat-shrinkable cylindrical label 1 after heat shrinkage has an appearance with excellent decorativeness. In particular, when the design print layer 42 is made of ink having a metallic gloss (colorant that is relatively easy to reflect light on the design print layer, or fine particles that can reflect or diffuse light such as metal fine particles and silica fine particles. Etc.), the heat-shrinkable cylindrical label 1 whose glittering feeling changes depending on the viewing angle can be provided.

In the heat-shrinkable cylindrical label 1 of the present invention, since the tubular film 2 is substantially composed of one heat-shrinkable film 4, wrinkles are generated in an arbitrary direction such as a circumferential direction during heat shrinkage. It is difficult to produce beautiful wrinkles according to the shrinkage restricting portion 3. In addition, since the single heat-shrinkable film 4 can be composed of a single-layer base film, it is possible to provide the heat-shrinkable tubular label 1 having a relatively inexpensive and beautiful wrinkle tone.
Further, when the heat-shrinkable cylindrical label 1 has a metal foil or has a design printing layer 42 using ink containing fine particles capable of reflecting or diffusing light, it has a wrinkle-like appearance and compatibility. It has a sparkling appearance.

In the heat-shrinkable cylindrical label 1 of the present invention, since the shrinkage restricting portion 3 is not provided in the upper area A of the tubular film 2, the upper area A can be heat-shrinked substantially equally in the circumferential direction. For this reason, the packaging body in which the bent portion of the heat-shrinkable cylindrical label 1 is in close contact with the peripheral edge portion of the upper surface 91a of the cap portion 91 of the adherend 9 (the adherend on which the heat-shrinkable cylindrical label 1 is heat-shrink mounted) 9) can be obtained.
Such a package is difficult to collect dust between the heat-shrinkable cylindrical label 1 and the cap portion 91, and can prevent foreign matter from being caught on the upper edge of the heat-shrinkable cylindrical label 1 during transportation.

The heat-shrinkable cylindrical label 1 attached to the adherend can be opened using a perforation.
For example, after the heat-shrinkable cylindrical label 1 is divided in the longitudinal direction using the auxiliary perforation 6, the heat-shrinkable cylindrical label 1 is divided in the circumferential direction using the opening perforation 7. Thus, the upper half of the heat-shrinkable cylindrical label 1 that is in close contact with the upper surface 91a of the cap portion 91 and the body portion 92 can be removed.
In the heat-shrinkable cylindrical label 1 of the present invention, since the tubular film 2 is substantially composed of a single heat-shrinkable film 4, the auxiliary perforation 6 and the opening perforation 7 are easily provided. Can be divided.
But the part in which the shrinkage | contraction regulation part 3 is provided among the cylindrical films 2 is hard to cut | disconnect only by the part in which the shrinkage | contraction regulation part 3 is provided. In particular, since the shrinkage restricting portion 3 is formed to extend in the vertical direction, when the heat-shrinkable cylindrical label 1 is to be divided in the circumferential direction, the dividing line is formed in the vertical direction by the side edge of the shrinkage restricting portion 3. Tend to be led.
In this respect, the opening perforation 7 is formed so that the through-hole 71 crosses part or all of the shrinkage restricting portion 3, so that when the film is cut using the opening perforation 7. In addition, the dividing line is not easily deviated in the vertical direction, and is easily divided in the circumferential direction along the opening perforation 7.

  Next, the modification of the heat-shrinkable cylindrical label of this invention is demonstrated. However, among the configurations and effects in the description of the following modified examples, the descriptions and the descriptions of the configurations and effects similar to those in the above embodiment may be omitted, and the terms and symbols may be used as they are.

Although the heat-shrinkable cylindrical label 1 of the said embodiment is formed in the cylinder shape before mounting | wearing to a to-be-adhered body, the heat-shrinkable cylindrical label of this invention is not limited to this, A to-be-adhered body It may be formed in a cylindrical shape when mounted on (not shown). Such a heat-shrinkable cylindrical label is a wound-type heat-shrinkable cylindrical label.
The heat-shrinkable cylindrical label that is formed in a cylindrical shape when mounted on the adherend is, for example, a part of one side end of a sheet-like heat-shrinkable film provided with a shrinkage restricting portion on the adherend. After adhering and winding this film around the adherend, the inner surface of the other side end is bonded to the outer surface of the one side end to form a cylinder. The heat-shrinkable cylindrical label wound and formed into a cylindrical shape is then heated to the heat-shrink temperature to cause heat-shrink, so that the heat-shrinkable cylindrical label adheres to the adherend as in the above embodiment. Can be made.

Further, the shrinkage restricting portion 3 of the above embodiment is formed substantially parallel to the vertical direction. However, in the present invention, the linear shrinkage restricting portion 3 may be formed so as to extend in the vertical direction. It is not limited to the case where it is substantially parallel to the vertical direction.
For example, as shown in FIG. 10, the heat-shrinkable cylindrical label 1 provided with the linear shrinkage restricting portion 3 inclined with respect to the circumferential direction may be used. In the heat-shrinkable cylindrical label 1 as well, since the linear shrinkage restricting portion 3 extends in the vertical direction, a plurality of rows of wrinkles extending in the upward direction are generated due to the heat shrinkage. In this case, the inclination angle of the linear shrinkage restricting portion 3 is not particularly limited. For example, the angle α formed between the extending direction of the shrinkage restricting portion 3 and the vertical direction is preferably 1 degree to 30 degrees.
Although not shown, for example, the heat-shrinkable cylindrical label 1 in which the linear shrinkage restricting portions 3 are provided in a spiral shape (curved shape in the vertical direction) may be used.
Although not shown, for example, the width W1 of the linear shrinkage restricting portion 3 and the width W2 of the film exposed portion 2a may not be constant in the vertical direction.

Furthermore, although the shrinkage restricting portion 3 of the above embodiment is provided on the outer surface of the tubular film 2, for example, as shown in FIG. 11, the shrinkage restricting portion 3 is provided on the inner surface of the tubular film 2. Alternatively, as shown in FIG. 12, the shrinkage restricting portion 3 may be provided on the outer surface and the inner surface of the tubular film 2.
Even if the shrinkage restricting portion 3 is provided on the inner surface and / or the outer surface, the heat shrinkage of the film portion provided with the shrinkage restricting portion 3 is restricted, so that the heat shrinkable cylindrical label 1 that produces a wrinkle-like appearance by heat shrinkage. Can provide.

  When the shrinkage restricting portion 3 is provided on the outer surface and the inner surface of the tubular film 2, the shrinkage restricting portion 3 is provided on the inner surface of the tubular film 2 corresponding to the shrinkage restricting portion 3 provided on the outer surface of the tubular film 2. (That is, the shrinkage restricting portions 3 provided on the outer surface and the inner surface of the tubular film 2 may be provided so as to overlap each other through the film), but as shown in FIG. It is preferable that the shrinkage restricting portions 3 are provided so as not to overlap each other, and it is more preferred that the shrinkage restricting portions 3 are alternately provided on the outer surface and the inner surface.

Furthermore, although the surface of the shrinkage restricting portion 3 of the above embodiment is formed in a planar shape substantially parallel to the outer surface of the heat-shrinkable film 4, the surface of the shrinkage restricting portion 3 is heated as shown in FIG. Although it may be formed in a flat shape that is inclined with respect to the outer surface (or inner surface) of the shrinkable film 4, or not particularly illustrated, the surface of the shrinkage restricting portion may be formed in an uneven shape. Good.
The heat-shrinkable cylindrical label 1 formed in a planar shape in which the surface of the shrinkage restricting portion 3 is inclined with respect to the outer surface (or inner surface) of the heat-shrinkable film 4 changes the light reflection direction. The appearance after heat shrinkage can be changed. The heat-shrinkable cylindrical label in which the surface of the shrinkage restricting portion is formed in a concavo-convex shape reflects the light irregularly, and thus has an appearance different from that of normal printing.

In addition, the heat-shrinkable cylindrical label 1 of the present invention can be used as a cap seal, and even when mounted on an adherend that does not have a cap portion, the effects of the present invention are exhibited.
For example, when the heat-shrinkable cylindrical label 1 of the present invention is attached so as to be in close contact with the body portion and the peripheral edge portion of the upper surface of an arbitrary resin molded product, the intermediate region of the heat-shrinkable cylindrical label 1 of the present invention is formed. The upper region of the heat-shrinkable cylindrical label 1 can be brought into close contact with the peripheral portion along its upper surface (not shown).
In the packaging body of the above embodiment, the heat-shrinkable cylindrical label 1 is attached to the upper part of the adherend 9 and the heat-shrinkable cylindrical label 1 is not attached to the lower part of the adherend 9. However, the form of the package is not limited to this. For example, as shown in FIG. 14, the heat-shrinkable cylindrical label 1 may be attached to the upper part and the lower part of the adherend 9. When the package shown in FIG. 14 is viewed from the front, only the heat-shrinkable cylindrical label 1 in which the adherend 9 is hidden and the wrinkles are generated in a plurality of rows in the circumferential direction is visible.
By using the heat-shrinkable cylindrical label 1 in which the shrinkage restricting portion 3 is not provided in the lower region C as the heat-shrinkable cylindrical label constituting the package, the lower region C is defined as the lower surface of the adherend 9. A bent portion that is bent to the (bottom surface) and is in close contact with the lower surface (bottom surface) of the adherend can be formed.

  DESCRIPTION OF SYMBOLS 1 ... Heat-shrinkable cylindrical label, 2 ... Cylindrical film, 2a ... Film exposure part of a cylindrical film, 2b ... Upper edge of a cylindrical film, 2c ... Lower edge of a cylindrical film, 3 ... Shrinkage control part, 4 ... heat-shrinkable film, 5 ... center seal portion, 6 ... auxiliary perforation, 7 ... opening perforation, 71 ... opening perforation, A ... upper region, B ... middle region, C ... lower region

Claims (4)

A cylindrical film capable of heat shrinking in the circumferential direction;
A shrinkage restricting portion that causes convex swelling in the tubular film by restricting thermal shrinkage of the tubular film;
The shrinkage restricting portions are provided in a plurality of rows in the circumferential direction of the tubular film and provided so as to extend in the vertical direction of the tubular film ,
The plurality of rows of shrinkage restricting portions are provided in at least an intermediate region excluding an upper region of the tubular film ,
The heat-shrinkable cylindrical label, wherein the plurality of rows of shrinkage restricting portions include at least one resin selected from a reactive curable resin, an electron beam curable resin, and an ultraviolet curable resin . Perforations are formed in the circumferential direction in the plane of the tubular film,
The heat-shrinkable cylindrical label according to claim 1, wherein the perforation through-hole is formed so as to cross part or all of the shrinkage restricting portion. A container having a cap part and a body part, and a heat-shrinkable cylindrical label attached to the container,
The heat-shrinkable cylindrical label is a tubular film that is heat-shrinkable in the circumferential direction, a linear shrinkage restricting portion that is provided in a plurality of rows in the circumferential direction of the tubular film and extends in the vertical direction of the tubular film, And the plurality of rows of shrinkage restricting portions are provided in at least an intermediate region excluding an upper region of the tubular film,
In the region of the tubular film where the shrinkage restricting portion is provided, a ridge that is a convex bulge extending in the vertical direction of the tubular film is formed, and the upper region of the tubular film is formed by the cap A package that is bent toward the upper surface of the part. The cylindrical film has a heat-shrinkable transparent base film, and a design printing layer provided on the inner surface of the base film,
The design printing layer is formed from an ink having a metallic luster,
The package according to claim 3, wherein the plurality of rows of shrinkage restricting portions are transparent and provided on an outer surface of the tubular film.

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