JP2015011126A - Heat-shrinkable cylindrical label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-shrinkable cylindrical label inducing no belt-like line pattern even when a primer layer is disposed.SOLUTION: The heat-shrinkable cylindrical label includes: a cylindrical body 21 comprising a heat-shrinkable film 3 having a design print layer 5 on a back surface thereof, formed into cylindrical with the back surface of the film 3 inside; and an adhesion part 6 where a first side end 31 and a second side end 32 of the heat-shrinkable film 3 are overlapped and adhered to each other. A primer layer 4 is formed between the heat-shrinkable film 3 and the design print layer 5. In the adhesion part 6, a surface of the first side end 31 of the heat-shrinkable film 3 is adhered to a surface of the second side end 32 of the film; first side edges 41, 51 of the primer layer 4 and the design print layer 5, respectively, are disposed between an edge 311 of the first side end 31 and an outer edge 62 of the adhesive part 6; and second side edges 42, 52 of the primer layer 4 and the design print layer 5, respectively, are disposed between an edge 322 of the second side end 32 and the outer edge 62 of the adhesion part 6.

Description

  The present invention relates to a heat-shrinkable cylindrical label formed into a tubular shape by bonding both end portions of a heat-shrinkable film.

Conventionally, for example, a heat-shrinkable cylindrical label is attached to the body of a beverage container for design display. Such a cylindrical label includes a cylindrical body in which a heat-shrinkable film having a design printed layer on the back surface is provided inside and the heat-shrinkable film in a cylindrical shape, and the heat-shrinkable film in the cylindrical shape. And an adhesive portion in which the first side end and the second side end are overlapped and bonded. The adhesive part is also called a center seal part.
In the conventional cylindrical label, the adhesive portion overlaps the back surface of the first side end portion of the film with the surface of the second side end portion of the film, and the overlapped front and back surfaces are mixed with a solvent (usually a solvent). (Although it is used, an adhesive may be used in some cases).

Japanese Patent Laid-Open No. 2005-266592

By the way, when printing a design printing layer on a film, in order to improve the fixability (adhesiveness) of printing ink, a primer layer may be provided in a film. When the primer layer is provided, the design printing layer is laminated on the primer layer.
However, it may be difficult to laminate the design printing layer on the primer layer without excess or deficiency. Specifically, since the primer layer is provided in order to improve the fixability of the printing ink, the design printing layer made of the printing ink is provided so as not to protrude from the surface of the primer layer. Theoretically, the printing ink may be applied to the primer layer so that the edge of the primer layer and the edge of the design printing layer coincide with each other. However, in some printing apparatuses, the printing ink cannot be applied as such. Sometimes. Therefore, when a design printing layer is formed using such a printing apparatus, printing ink is applied slightly closer to the inner side than the edge of the primer layer. Then, the edge of the design print layer becomes inside the edge of the primer layer, and an area where the primer layer is exposed is generated between the edge of the design print layer and the edge of the film. When a heat-shrinkable cylindrical label is produced by overlaying and bonding the back surface of the first side end portion 310 of such a film 300 to the surface of the second side end portion 320 of the film 300, FIG. As shown, the region N1 where the design print layer 500 does not exist in the first side end portion 310 and the region N2 where the design print layer 500 does not exist in the second side end portion 320 overlap. The overlapping region is a design blank region where the primer layer 400 is present but the design printing layer 500 is not present. Therefore, in the design blank region in the vicinity of the adhesive portion in the heat-shrinkable cylindrical label before heat shrinking. There is a problem that the resulting band-like line pattern is generated. In such a heat-shrinkable cylindrical label, the strip-shaped line pattern remains even after heat-shrinking.

  Further, as shown in FIG. 17B, the second side end portion is arranged such that the design print layer 500 of the second side end portion 320 overlaps the region N1 where the design print layer 500 of the first side end portion 310 does not exist. When the surplus margin part 320a of 320 is shifted to the right side of FIG. 17A and adhered to the first side end part 310, the design blank area is formed in the vicinity of the adhesive part in the heat-shrinkable cylindrical label before contraction. Does not occur. However, when the heat-shrinkable cylindrical label is heat-shrinked, the margin allowance 320a that is a free end is greatly shrunk, so that the design printing of the first side end 310 is performed as shown in FIG. The region N1 where the layer 500 does not exist overlaps the region N2 where the design printing layer 500 of the second side end portion 320 does not exist, and a band-like line pattern resulting from the design blank region is generated. When heated, the region N1 of the first side end portion 310 contracts and becomes smaller, but the margin portion 320a, which is a free end portion, contracts more than this, so that the region N1 and the region N2 overlap. A portion (design blank area) is generated.

  An object of the present invention is to provide a heat-shrinkable cylindrical label that does not generate a strip-like line pattern even when a primer layer is provided.

  The heat-shrinkable cylindrical label of the present invention has a tubular body in which the heat-shrinkable film is formed in a tubular shape with the back surface of the heat-shrinkable film provided with a design printing layer on the back side, and the tubular shape. A heat-shrinkable film having a first side end and a second side end overlapped and bonded, and a primer layer is provided between the heat-shrinkable film and the design printing layer. In the bonding portion, the surface of the first side end portion of the heat-shrinkable film and the surface of the second side end portion of the film are bonded, and each first of the primer layer and the design printing layer A side edge is disposed between an edge of the first side end portion of the film and an outer edge of the adhesive portion, and each second side edge of the primer layer and the design printing layer is an edge of the second side end portion of the film. Between the outer edges of the adhesive portions.

In a preferable cylindrical label of the present invention, the edge of the first side end portion and the edge of the second side end portion of the film are uneven.
A preferable cylindrical label of the present invention is arranged such that the first side edge of the design printing layer is closer to the adhesive part side than the edge of the first side end of the film, and the first side edge of the design printing layer Between the edges of the first side end of the film, the back surface of the primer layer is exposed.

When the heat-shrinkable cylindrical label of the present invention is viewed from the outside, a strip-like line pattern unrelated to the design of the design print layer does not appear, and is displayed on the design print layer without interruption in the vicinity of the adhesive portion. You can see the design. Furthermore, since the design printing layer is provided on the primer layer, the design also looks beautiful.
Moreover, when the preferable heat-shrinkable cylindrical label of the present invention is mounted on an adherend, it is possible to effectively suppress the generation of scratches on the design print layer.

The perspective view of the heat-shrinkable cylindrical label which concerns on 1st Embodiment of this invention. The top view which looked at the heat-shrinkable cylindrical label from the upper side. The cross-sectional view cut | disconnected by the III-III line of FIG. 1 (cross-sectional view which cut | disconnected the adhesive part vicinity in the circumferential direction of the heat-shrinkable cylindrical label). The top view of the state which folded the heat-shrinkable cylindrical label into flat shape. The perspective view which looked at the label base material from the back side. The top view which looked at the substrate raw material from the back side. Sectional drawing cut | disconnected by the VII-VII line of FIG. The reference drawing which shows the procedure which forms a elongate cylindrical label continuous body from a base material raw material. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 1st example of 2nd Embodiment. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 2nd example of 2nd Embodiment. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 3rd example of 2nd Embodiment. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 4th example of 2nd Embodiment. (A) is a reference sectional view of the vicinity of the adhesion part when the heat-shrinkable cylindrical label of the first embodiment is attached to an adherend, and (b) and (c) are the heat-shrinkability of the second embodiment. FIG. 3 is a reference cross-sectional view of the vicinity of an adhesive portion when a cylindrical label is attached to an adherend. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 1st example of 3rd Embodiment. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 2nd example of 3rd Embodiment. Sectional drawing of the adhesion part vicinity of the heat-shrinkable cylindrical label which concerns on the 3rd example of 3rd Embodiment. (A) thru | or (c) is reference sectional drawing of the adhesion part vicinity of a heat-shrinkable cylindrical label in order to demonstrate the cause which a strip | belt-shaped striped pattern produces.

Hereinafter, the present invention will be specifically described with reference to the drawings.
However, as a term indicating a direction, “inside” refers to a radially inner side when a heat-shrinkable cylindrical label is used (in other words, refers to a side that is not visible from the outside based on the heat-shrinkable cylindrical label). ). The “outer side” is the opposite side to the “inner side” and indicates the outer side of the diameter when a heat-shrinkable cylindrical label is formed. The “back surface” of each component (such as a heat-shrinkable film) refers to the inner surface of the heat-shrinkable cylindrical label, and the “front surface” refers to the opposite surface. The first and second terms are prefixed with the terms. The first and second terms are for convenience of distinguishing terms, and do not have special meanings such as superiority or inferiority of terms. It should be noted that the thickness and size of the cylindrical label and each component in each drawing are different from the actual ones.

[First Embodiment]
(Outline of heat-shrinkable cylindrical label)
1 to 4, the heat-shrinkable cylindrical label 1 includes a tubular body 21 formed in a tubular shape with the back surface of the label substrate 2 including the heat-shrinkable film 3 inside, and heat-shrinkable. And a bonding portion 6 in which the first side end portion 31 and the second side end portion 32 of the film 3 are overlapped and bonded. In each figure, the adhesion part 6 is represented by black painting.
In the bonding portion 6, the surface of the first side end portion 31 of the heat-shrinkable film 3 and the surface of the second side end portion 32 of the film 3 are bonded.
The label substrate 2 includes a heat-shrinkable film 3, a primer layer 4 provided on the back surface of the film 3, and a design printing layer 5 provided on the back surface of the primer layer 4.

In addition, the heat-shrinkable cylindrical label 1 is generally provided in the aspect of the continuous cylindrical label continuous body which formed the elongate label base material in the cylinder shape. Then, by pulling out the long cylindrical label continuous body wound around a roll, and cutting the label continuous body into a predetermined length immediately before being attached to an adherend (for example, a beverage container such as a PET bottle). One heat-shrinkable cylindrical label 1 is obtained. The heat-shrinkable cylindrical label referred to in the present invention is meant to include either the above-described long cylindrical label continuous body or one aspect. In addition, in FIG. 1 thru | or FIG. 4, the one heat-shrinkable cylindrical label 1 is illustrated. The heat-shrinkable cylindrical label 1 has a cylindrical shape such as a pipe as shown in FIGS. 1 and 2, but is folded in a flat shape as shown in FIG. 4 when not in use.
The heat-shrinkable cylindrical label 1 is a cylindrical label that has a property of reducing the diameter when heated to a predetermined temperature or higher (has heat-shrinkability) and can be attached to an adherend by the reduced diameter. The heat-shrinkable film 3 is also called a shrink tube or a shrink label. The heat-shrinkable cylindrical label 1 of the present invention may have both self-stretchability on the condition that it has heat-shrinkability. Self-stretchability means a property that the diameter can be expanded by applying an expansion force, and when the expansion force is released, it is generally restored to its original state.

(Heat shrinkable film)
As the heat-shrinkable film 3, for example, a film that can be largely heat-shrinked in one direction (when the cylindrical label 1 is used, its circumferential direction; the same applies hereinafter) is used. The heat-shrinkable film 3 may slightly heat shrink or slightly heat expand in the other direction (a direction perpendicular to the one direction in the plane of the film). Examples of the heat-shrinkable film 3 include polyester resins such as polyethylene terephthalate and polylactic acid; polyolefin resins such as polypropylene and cyclic olefin resins; polystyrene resins such as polystyrene and styrene-butadiene copolymers; A synthetic resin film made of one kind or a mixture of two or more kinds selected from thermoplastic resins such as a series resin can be used. Since it is comparatively strong, it is preferable to use a polyester film as the heat-shrinkable film 3, and it is more preferable to use a polyethylene terephthalate film among the polyester films. The heat-shrinkable film 3 may have a heat-shrink property and a self-stretch property.

The heat-shrinkable film 3 may be composed of a single layer film (single layer film), or may be composed of a film in which two or more layers are laminated (laminated film). When the heat-shrinkable film 3 is a laminated film, each layer of the laminated film can be arbitrarily selected. As the laminated film, a laminated film in which two or more kinds of film layers having heat shrinkability are laminated, a laminated film in which a transparent gas barrier layer is laminated on a film layer having heat shrinkability, and the like can be used. When the heat-shrinkable film 3 is a laminated film, the material of each film layer may be substantially the same or different. Since the heat-shrinkable cylindrical label 1 of the present invention bonds the surface of the first side end portion 31 and the surface of the second side end portion 32 of the heat-shrinkable film 3, the outermost layer and the outermost layer are separated from each other. Even when a laminated film made of different materials is used as the heat-shrinkable film 3, the strongly bonded adhesion portion 6 can be formed.
The heat-shrinkable film 3 in the illustrated example is a laminated film having a first layer 3a and a second layer 3b, but the laminated film is not limited to two layers, and may be three or more layers.

In order to allow the design printed layer 5 on the back side to be seen through from the outside of the heat-shrinkable cylindrical label 1, the heat-shrinkable film 3 is a colorless transparent or colored transparent film, preferably a colorless transparent film. Is used. In the present specification, the degree of transparency may be such that the design represented on the design print layer 5 can be visually recognized from the outside of the heat-shrinkable cylindrical label 1.
The heat shrinkage rate of the heat-shrinkable film 3 is not particularly limited as long as it can be adhered to the adherend by heat shrinkage, but usually the heat shrinkage rate in one direction (90 ° C. in warm water for 10 seconds) Immersion) is about 30% or more. The heat-shrinkable film 3 may be thermally contracted or expanded in the other direction. The heat shrinkage rate (immersion for 10 seconds in 90 ° C. warm water) in the other direction of the heat-shrinkable film 3 is, for example, −3% to 15%, preferably −1% to 10%.
However, heat shrinkage rate (%) = [{(original length in one direction or other direction) − (length after immersion in one direction or other direction)} / (original length in one direction or other direction) )] × 100.
Although the thickness of the heat-shrinkable film 3 is not specifically limited, Usually, they are 20 micrometers-100 micrometers.

(Primer layer)
The primer layer 4 is provided in a solid shape on the back surface of the heat-shrinkable film 3. That the primer layer 4 is provided in a solid form means that the primer layer forming material is provided without gaps to such an extent that the primer layer forming material appears to be continuously present when viewed macroscopically by human eyes. That is. Therefore, when the primer layer 4 is viewed microscopically using a magnifying glass or the like, it may be in the shape of a sea island with the film surface as the sea and the primer layer forming material as the countless islands. In this case, the solid shape is included. For example, when the primer layer 4 is formed by applying a primer layer forming material by a known printing method, the primer layer forming material appears macroscopically continuously, but microscopically, countless islands (Dots) are densely scattered.
The primer layer 4 may be provided not only on the entire back surface of the heat-shrinkable film 3 but also partially. The primer layer 4 should just be provided in the range in which the design printing layer 5 is provided at least.

The primer layer forming material is not particularly limited as long as it can improve the fixability of the printing ink of the design printing layer 5. Primer layer forming materials include polyester resins, polyolefin resins, polyamide resins, acrylic resins, urethane resins, polystyrene resins, cellulose resins, polyvinyl acetate resins, polyvinyl chloride resins, polycarbonate resins, etc. These thermoplastic resins can be mentioned. As the heat-shrinkable film 3, the primer layer 4 is colorless and transparent or colored and transparent, and preferably is colorless and transparent. The primer layer 4 can be formed by applying a primer layer forming material using a conventionally known coating method or printing method.
The thickness of the primer layer 4 is not specifically limited, For example, it is 0.1 micrometer-10 micrometers, More preferably, it is 0.2 micrometer-3 micrometers.

(Design printing layer)
The design printing layer 5 is a layer for imparting a desired design to the heat-shrinkable cylindrical label 1. The design printing layer 5 is provided in a solid shape on the back surface of the primer layer 4. The design printing layer 5 is provided in a solid form, as with the primer layer 4 described above, so that the printing ink can be seen without any gap to the extent that the printing ink can be seen continuously when viewed macroscopically by human eyes. Is provided. In addition, when the design printing layer 5 is a multilayer, it is not necessary that all the layers of the multilayer are solid, and the design printing layer 5 composed of the multilayer is considered as one layer, and the design printing layer 5 Is provided in a solid shape. In addition, the design printing layer 5 may be provided not only on the entire back surface of the primer layer 4 but also partially. As a case where the design print layer 5 is partially provided, for example, the design print layer 5 is not provided in the upper region of the back surface of the primer layer 4 and the design print layer 5 is provided in other regions. In the case where the design print layer 5 is not provided in the central region of the back surface of the primer layer 4 and the design print layer 5 is provided in the peripheral region of the back surface of the primer layer 4, any of the back surfaces of the primer layer 4 Examples include a case where the design printing layer 5 is not provided in the region and the design printing layer 5 is provided in the other region.

The design print layer 5 may be a single layer, but is usually composed of multiple layers. Preferably, the design printing layer 5 includes a design layer that represents characters and pictures, and a background layer that makes the design of the characters and pictures beautiful. But the design printing layer 5 may be comprised only from the design layer. In addition, the design layer and the background layer may be independently formed by a single application of printing ink, or may be formed by a plurality of applications of printing ink. In the present invention, since the cylindrical body 21 is formed with the front side of the heat-shrinkable film 3 facing outside, the design layer is provided on the back surface of the primer layer 4, and the background layer is on the back surface of the design layer. Provided. However, in the drawing, the design print layer 5 is represented by one layer without dividing the design layer and the background layer.
The design layer and the background layer can be formed by applying printing ink using a known printing method. The background layer preferably has a single color such as white or silver to make the design stand out.
In addition, you may provide the coating layer for protecting a printing layer in the back surface of the design printing layer 5 as needed.
Although the thickness of the design printing layer 5 is not specifically limited, Usually, it is 0.1 micrometer-10 micrometers, Preferably, it is 0.5 micrometer-5 micrometers.

(Label substrate)
As shown also in FIG. 5, the label base material 2 consists of the sheet body by which the said heat-shrinkable film 3, the primer layer 4, and the design printing layer 5 were laminated | stacked in order. The label base material 2 has a rectangular shape in plan view. In this embodiment, the edge 311 of the first side end portion 31 of the heat-shrinkable film 3, the first side edge 41 of the primer layer 4, and the first side edge 51 of the design printing layer 5 are all coincident. Yes. Further, the edge 322 of the second side end portion 32 of the heat-shrinkable film 3, the second side edge 42 of the primer layer 4, and the second side edge 52 of the design printing layer 5 are all coincident. That is, one edge 311, 41, 51 and the other edge 322, 42, 52 of the heat-shrinkable film 3, the primer layer 4, and the design print layer 5 are aligned. Accordingly, the first side edge 41 of the primer layer 4 and the first side edge 51 of the design printing layer 5 are disposed between the edge 311 of the first side end portion 31 of the heat-shrinkable film 3 and the outer edge 62 of the adhesive portion 6. The second side edge 42 of the primer layer 4 and the second side edge 52 of the design printing layer 5 are also between the edge 322 of the second side end portion 32 of the heat-shrinkable film 3 and the outer edge 62 of the adhesive portion 6. Is arranged.
Here, the 1st side edge part 31 of the heat-shrinkable film 3 is a strip | belt-shaped area | region extended in an up-down direction in one side (equivalent to the main heat-shrink direction) of the heat-shrinkable film 3, 1st side An edge 311 of the end portion 31 is one end surface in one direction of the heat-shrinkable film 3. The second side end portion 32 of the heat-shrinkable film 3 is a band-like region extending in the vertical direction on the other side (one side opposite to the one side) in one direction of the heat-shrinkable film 3, and the second side end portion 32. The edge 322 of the heat shrinkable film 3 is the other side end face in one direction. Hereinafter, the edge 311 of the first side end portion 31 is referred to as a first side end edge 311, and the edge 322 of the second side end portion 32 is referred to as a second side end edge 322. The first side edges 41 and 51 of the primer layer 4 and the design print layer 5 are end surfaces on the side of the primer layer 4 and the design print layer 5 that extend in the vertical direction on the first direction in one direction of the heat-shrinkable film 3. . The second side edges 42 and 52 of the primer layer 4 and the design print layer 5 are side end surfaces of the primer layer 4 and the design print layer 5 that extend in the vertical direction on the other side in one direction of the heat-shrinkable film 3.

(Cylindrical body and bonded part)
The cylindrical body 21 is a cylindrical portion obtained by rolling the rectangular label substrate 2 into a cylindrical shape, and the adhesive portion 6 is a first side end of the heat-shrinkable film 3 in order to maintain the cylindrical shape. This is a portion where the surface of the portion 31 and the surface of the second side end portion 32 are bonded. The heat-shrinkable cylindrical label 1 includes a cylindrical body 21 having the adhesive portion 6.
The heat-shrinkable cylindrical label 1 has a heat-shrinkable film 3 formed in a cylindrical shape with the back surface of the heat-shrinkable film 3 provided with the design printing layer 5 on the back surface, and the first side end of the label base 2 31 and the second side end portion 32 are formed inside, and the surface of the first side end portion 31 of the heat-shrinkable film 3 and the surface of the second side end portion 32 of the heat-shrinkable film 3 are bonded by a predetermined width. Has been. A portion bonded by a predetermined width is an adhesive portion 6.
The width | variety of the adhesion part 6 is not specifically limited, Usually, 2 mm-10 mm, Preferably they are 3 mm-7 mm.

  Specifically, the first side end portion 31 is overlapped with the surface of the second side end portion 32 at a fold line 71 extending in the vertical direction at a position closer to the inside from the first side end edge 311. The first side end 31 is folded 180 degrees at the fold 71. As for the 1st side edge part 31 turned back in this way, the surface (surface of the heat-shrinkable film 3) faces the surface (surface of the heat-shrinkable film 3) of the 2nd side edge part 32. A solvent (or adhesive) is vertically applied to at least one of the surface of the first side end portion 31 and the surface of the second side end portion 32, and heat shrinks through the solvent (or adhesive). The surface of the first side end portion 31 and the surface of the second side end portion 32 of the conductive film 3 are bonded in a band shape. The portion bonded to the belt having a predetermined width is the bonding portion 6. The bonding portion 6 exists inside the cylindrical body 21. As shown in FIG. 4, when the heat-shrinkable cylindrical label 1 is flattened, the adhesive portion 6 is usually along the back surface of the cylindrical body 21. Therefore, when the heat-shrinkable cylindrical label 1 is flattened, the back surface of the first side end portion 31 overlaps the back surface of the design printing layer 5 inside the cylindrical body 21. After that, even after the flat heat-shrinkable cylindrical label 1 is opened and covered with the container and thermally contracted, the back surface of the first side end portion 31 remains on the design printing layer 5 inside the cylindrical body 21. It overlaps the back side. In addition, when the flat heat-shrinkable cylindrical label 1 is opened, the first side end portion 31 and the second side end portion 32 may stand up and separate from the back surface of the design printing layer 5. However, after the heat shrinkage, the first side end portion 31 and the second side end portion 32 that have stood up fall down to the left or right, and the back surface of the first side end portion 31 is again inside the cylindrical body 21. It overlaps with the back surface of the layer 5.

In the heat-shrinkable cylindrical label 1 of this embodiment, as shown in FIG. 3, the first side edge 311 and the second side edge 322 coincide with each other.
Further, the bonding portion 6 may be formed up to the first side edge 311 and the second side edge 322 (in other words, the entire first side edge 31 and the entire second side edge 32). And may be bonded). In the present embodiment, the bonding portion 6 is not formed up to the first side edge 311 and the second side edge 322. In other words, the entire first side end portion 31 and the entire second side end portion 32 are not bonded, and the inner edge 61 of the bonding portion 6 is slightly separated from the first side end edge 311 and the second side end edge 322. Are located apart. Accordingly, the first side end portion 31 extends to the inner side than the inner edge 61 of the bonding region 31 a bonded to the second side end portion 32 at the bonding portion 6 and the inner edge 61 of the bonding portion 6, and the second side end portion. And an extended region 31b that is not bonded to 32. Similarly, the second side end portion 32 extends to the inside of the bonding region 32a bonded to the first side end portion 31 by the bonding portion 6 and the inner edge 61 of the bonding portion 6 and is the first side end. And an extended region 32b that is not bonded to the portion 31. Hereinafter, the adhesion region 31a and the extension region 31b of the first side end portion 31 are referred to as a first adhesion region 31a and a first extension region 31b, respectively, and the adhesion region 32a and the extension region 32b of the second side end portion 32, respectively. Are referred to as a second adhesion region 32a and a second extension region 32b, respectively. The primer layer 4 and the design printing layer 5 are provided on the entire back surface of the first adhesion region 31a and the first extension region 31b. Similarly, the primer layer 4 and the design printing layer 5 are provided on the entire back surface of the second adhesion region 32a and the second extension region 32b. When the primer layer 4 and the design printing layer 5 are laminated on the film, heat shrinkage is less likely than in the case of only the film, and thus damage due to displacement due to shrinkage can be effectively prevented.
The widths of the first bonding region 31 a and the second bonding region 32 a are equal to the width of the bonding portion 6. The widths of the first extension region 31b and the second extension region 32b are each independently, for example, 1 mm to 10 mm, and preferably 2 mm to 5 mm.

(Method for producing heat-shrinkable cylindrical label)
The heat-shrinkable cylindrical label 1 can be manufactured, for example, by the following method. In addition, as described above, usually, a single continuous heat-shrinkable material is produced by producing a continuous long continuous label body in which a long label base material is formed into a cylindrical shape and cutting it into a predetermined length. A cylindrical label 1 is obtained. The following production method shows a procedure for producing a continuous long continuous cylindrical label.
First, a base material is prepared. As shown in FIG.6 and FIG.7, the primer layer 4 is provided in the back surface of the elongate film original fabric A which has heat shrinkability in one direction (short side direction). The primer layer 4 may be provided on the entire back surface of the long film original fabric A. However, in the illustrated example, the primer layer 4 is provided in a range on the inner side of the unidirectional side edges A1 and A2 of the long film original fabric A. It has been. A design printing layer 5 is provided on the back surface of the primer layer 4. In this case, the design printing layer 5 is provided by applying printing ink in a range slightly closer to the inner side than the side edges 48 and 49 in one direction of the primer layer 4. The width of the side edges 58 and 59 of the design printing layer 5 and the side edges 48 and 49 of the primer layer 4 (how much the design printing layer 5 can be moved closer to the inside than the side edges 48 and 49 of the primer layer 4) is, for example, It is 2 mm or more, preferably 3 mm or more. Providing the design print layer 5 in this way can be carried out using most printing apparatuses.
Thus, the base material original B by which the design printing layer 5 was provided in the back surface of the elongate film original fabric A via the primer layer 4 can be obtained.

Next, an elongated cylindrical label continuous body is manufactured using the base material fabric B. In the heat-shrinkable cylindrical label 1 of this embodiment, the edges of the heat-shrinkable film 3, the primer layer 4 and the design print layer 5 are aligned. In order to form such a heat-shrinkable cylindrical label 1, the base material B is placed at both side edges 58 and 59 of the design printing layer 5 or slightly inward positions X 1 and X 2 from both side edges 58 and 59. 1 are cut in the longitudinal direction (refer to FIG. 7 for the side edges 58 and 59 and the inward positions X1 and X2). By the said cutting | disconnection, the base-material original fabric B in which each side edge of the heat-shrinkable film 3, the primer layer 4, and the design printing layer 5 was equal can be obtained. The base material fabric B is bent in order, and the first side end portion 31 and the second side end portion 32 are bonded.
In FIG. 8, the folding procedure of the base material fabric B is shown. However, in FIG. 8, the base material fabric B is represented by a single solid line for convenience. In the base material B shown in FIG. 8A, the design print layer 5 shown in FIG. The first side end portion 31 of the base material fabric B is folded inward by 180 degrees at the crease 71 so that the design printing layer 5 faces (see FIG. 5B). Further, the left quarter region B1 including the second side end portion 32 of the base material B is folded inward by 180 degrees at the crease 72 so that the design printing layer 5 faces (see FIG. 4C). ). The first side end 31 and the left approximately quarter region B1 may be bent first or at the same time. Further, the approximately right quarter region B <b> 2 of the first side end portion 31 is bent 180 degrees at the crease 73, and the surface of the first side end portion 31 is overlapped with the surface of the second side end portion 32. By bonding the overlapped portions to form the bonded portion 6, the continuous cylindrical label continuous body 10 can be obtained (see FIG. 4D). The long cylindrical label continuous body 10 has the same configuration as the flat heat-shrinkable cylindrical label 1 shown in FIG. 4 except that it is long.

(Use and effects of heat-shrinkable cylindrical labels)
The heat-shrinkable cylindrical label 1 of the present invention is attached to an adherend by a method similar to the conventional method.
For example, after the heat-shrinkable cylindrical label 1 is fitted on the adherend, the heat-shrinkable tubular label 1 is attached to the adherend by heating to a predetermined heat-shrink temperature (for example, 80 ° C. to 100 ° C.). Can be installed.
The adherend is not particularly limited, and representative examples include containers filled with foods such as beverages, containers filled with cosmetics and shampoos, and the like.

The adhesive portion 6 of the heat-shrinkable cylindrical label 1 of the present invention has the surface of the first side end portion 31 of the heat-shrinkable film 3 bent inward and the surface of the second side end portion 32 of the heat-shrinkable film 3. And are bonded together. The design printing layer 5 is provided up to the first side edge 311 and the second side edge 322 on the back surface of the heat-shrinkable cylindrical label 1 through the primer layer 4. For this reason, since the design printing layer 5 continues in the circumferential direction of the cylindrical body 21, when the heat-shrinkable cylindrical label 1 of the present invention is viewed from the outside, the design printing layer is present at any location in the circumferential direction. The design shown in 5 can be seen. In the conventional cylindrical label, the portion without the design printing layer 5 appears in the vicinity of the adhesive portion 6 as a strip-shaped line pattern, but the heat-shrinkable cylindrical label 1 of the present invention does not exhibit such a strip-shaped line pattern. The adhesive part 6 is hardly noticeable.
Moreover, since the primer layer 4 is provided in the heat-shrinkable film 3, and the design printing layer 5 is provided in the primer layer 4, the design of the design printing layer 5 appears neatly.
Furthermore, since the adhesion part 6 of the heat-shrinkable cylindrical label 1 of this invention is formed by adhere | attaching the surfaces of the heat-shrinkable film 3, it has strong adhesive strength.

  Next, another embodiment of the present invention will be described. Hereinafter, configurations and effects different from those of the first embodiment will be mainly described, and the same configurations and effects will be omitted (assumed to be described), and terms and figure numbers may be used. In other embodiments, the heat-shrinkable film is illustrated as a single-layer film. However, in other embodiments, a laminated film may be used as the heat-shrinkable film.

[Second Embodiment]
In the heat-shrinkable cylindrical label 1 according to the first embodiment, the first side edge 311 and the second side edge 322 are aligned (although they are aligned). The first side edge 311 and the second side edge 322 of the conductive film 3 may be uneven.
For example, in the first example shown in FIG. 9, the first side edge 311 is arranged at a position closer to the inner edge 61 of the bonding portion 6 than the second side edge 322. Therefore, in the first example, the width of the first extension region 31 b of the first side end portion 31 is smaller than the width of the second extension region 32 b of the second side end portion 32.
In the second example shown in FIG. 10, the second side end edge 322 is arranged at a position closer to the inner edge 61 of the bonding portion 6 than the first side end edge 312. Therefore, in the second example, the width of the second extension region 32 b of the second side end portion 32 is smaller than the width of the first extension region 31 b of the first side end portion 31.
The third example shown in FIG. 11 is the same as FIG. 9 in that the first side edge 311 is arranged at a position closer to the inner edge 61 of the adhesive portion 6 than the second side edge 322. The difference is that the one-side end edge 311 coincides with the inner edge 61 of the bonding portion 6. Therefore, in the third example, the first side end portion 31 does not have the first extension region, and consists only of the first adhesion region 31a.
The fourth example shown in FIG. 12 is the same as FIG. 10 in that the second side edge 322 is disposed closer to the inner edge 61 of the bonding portion 6 than the first side edge 311. The difference is that the two-side end edge 322 matches the inner edge 61 of the bonding portion 6. Therefore, in the fourth example, the second side end portion 32 does not have the second extension region, and consists only of the second adhesion region 32a.

  When the first side edge 311 and the second side edge 322 of the heat-shrinkable film 3 are uneven as in the second embodiment, the design printed layer 5 is damaged when the heat-shrinkable cylindrical label is attached. Can prevent sticking. Specifically, as shown in the first embodiment, when the first side edge 311 and the second side edge 322 are aligned, as shown in FIG. A large level difference corresponding to the sum of the thicknesses of the first side end portion 31 and the second side end portion 32 occurs between the inner surfaces of the cylindrical body 21. When the heat-shrinkable tubular label 1 is heat-shrinked, the inner surface of the tubular body 21 (the inner surface of the tubular body 21 is the back surface of the design printing layer) due to the shrinkage stress of the heat-shrinkable film 3. Among them, the cylindrical body 21 contracts while the inner surface portion M1 facing the outer corner portion of the first side edge 311 of the heat-shrinkable film 3 strongly hits the outer corner portion. That is, since the cylindrical body 21 moves while the inner surface portion M1 facing the outer corner portion is in strong contact with the outer corner portion, the outer corner portion rubs the inner surface portion M1, and the design printing layer on the inner surface portion M1 is damaged. There is a fear. In particular, the extension regions 31b and 32b are free end portions and contract toward the bonding portion 6 during heating, so that the damage is likely to occur.

  In this regard, when the first side edge 311 and the second side edge 322 are uneven as in the second embodiment, as shown in FIG. 13B, the outer surface of the adherend 9 and the cylindrical body A step corresponding to the thickness of the first side end portion 31 and a step corresponding to the thickness of the second side end portion 32 are generated between the inner surfaces of 21. Therefore, the level difference per contact is reduced and the level difference is dispersed. When the heat-shrinkable cylindrical label 1 is heat-shrinked, the inner surface portion M1 facing the outer corner portion of the first side edge 311 of the heat-shrinkable film 3 hits the outer corner portion, and the second side end. Since the inner surface portion M2 facing the outer corner portion of the edge 322 hits the outer corner portion, the pressure (clamping force of the cylindrical label 1) applied to the inner surface portions M1 and M2 when the cylindrical label 1 is thermally contracted is dispersed. For this reason, it can prevent that the design printing layer in each inner surface part M1, M2 is damaged.

FIG. 13B shows the first example of the second embodiment. In this case, the first extension region 31b is shorter than the second extension region 32b. The contraction amount of the shorter region 31b is small, and the contraction amount of the longer region 32b is large. Although the second extending region 32b has a large contraction amount, the first extending region 31b exists, and therefore, the inner region M2 facing the outer corner of the second side edge 322 is equal to the thickness of the region 31b. On the other hand, it becomes difficult to apply the tightening force of the cylindrical label 1. On the other hand, the structure of FIG. 13B is a structure in which a tightening force is more likely to be applied to the inner surface portion M1 facing the outer corner of the first side edge 311 than the inner surface portion M2. In addition, since the first extension region 31b has a small contraction amount (that is, since the shift of the first side edge 311 is small), the outer corner portion hardly rubs the inner surface portion M1. Such a point is also significant in preventing the scratches.
In the third example shown in FIG. 11, since the first extension region is not provided, the displacement of the first side edge 311 is extremely small, and the inner surface portion M1 due to the outer corner portion of the first side edge 311. Can be effectively prevented.

In the second example of the second embodiment, as shown in FIG. 13C, since the first extension region 31b is longer than the second extension region 32b, the outer corner of the second side edge 322 is The first extension region 31b is covered. Therefore, the outer corners of the second side edge 322 do not hit the inner surface of the design print layer, so that the design print layer can be prevented from being damaged.
Although the first extension region 31b has a large shrinkage amount, the second extension region 32b exists, and therefore, the inner surface portion facing the outer corner of the first side edge 311 by the thickness of the region 32b. It becomes difficult to apply the tightening force of the cylindrical label 1 to M1. Such a point is also significant in preventing the scratches.
However, in FIG. 13, the primer layer and the design printing layer are not shown, but it should be noted that these layers are provided on the back surface of the heat-shrinkable film 3.

[Third Embodiment]
In the heat-shrinkable cylindrical label 1 of the first embodiment, the first side edge 311 of the heat-shrinkable film 3, the first side edge 41 of the primer layer 4, and the first side edge of the design printing layer 5. 51 is identical, but is not limited to this, and one of the three edges 311, 41, 51 may not coincide with the remaining edge, or the three edges 311, 41, 51 51 may not match each other. Similarly, even if one selected from the second side edge 322 of the heat-shrinkable film 3, the second side edge 42 of the primer layer 4, and the second side edge 52 of the design printing layer 5 does not coincide with the remaining edge. Alternatively, the three edges 322, 42, 52 may not coincide with each other.
For example, in the first example shown in FIG. 14, the first side edge 311 of the heat-shrinkable film 3 and the first side edge 41 of the primer layer 4 are matched, and the first side edge 51 of the design printing layer 5 is The primer layer 4 is disposed at a position closer to the inner edge 61 of the bonding portion 6 than the first side edge 41 of the primer layer 4. Further, the second side edge 322 of the heat-shrinkable film 3 and the second side edge 42 of the primer layer 4 coincide with each other, and the second side edge 52 of the design printing layer 5 matches the second side edge 42 of the primer layer 4. Rather than the inner edge 61 of the bonding portion 6. In this way, the heat-shrinkable cylindrical label 1 in which the side edges 51 and 52 of the design print layer 5 are close to the adhesive portion 6 is obtained by using the base material B prepared at the time of manufacture shown in FIGS. It can be obtained by cutting in the longitudinal direction at both side edges 48, 49 or at slightly inward positions X3, X4 from both side edges 48, 49, and forming this base material fabric into a cylindrical shape.
The primer layer is arranged between the first side edge 51 of the design print layer 5 and the first side edge 311 of the heat-shrinkable film 3 by arranging the first side edge 51 of the design print layer 5 closer to the adhesive portion 6. The back surface of 4 is exposed. Hereinafter, the first exposed surface 411 of the primer layer 4 is referred to. The primer layer is arranged between the second side edge 52 of the design print layer 5 and the second side edge 322 of the heat-shrinkable film 3 by arranging the second side edge 52 of the design print layer 5 closer to the adhesive portion 6. The back surface of 4 is exposed. Hereinafter, the second exposed surface 422 of the primer layer 4 is referred to.

  In the second example shown in FIG. 15, the first side edge 311 of the heat-shrinkable film 3 and the first side edge 41 of the primer layer 4 coincide, and the first side edge 51 of the design printing layer 5 is the primer layer. 4 is arranged at a position closer to the inner edge 61 of the bonding portion 6 than the first side edge 41 of the fourth. Further, the second side edge 322 of the heat-shrinkable film 3, the second side edge 42 of the primer layer 4, and the second side edge 52 of the design printing layer 5 are arranged in alignment. In the case of this second example, the first exposed surface 411 of the primer layer 4 is generated.

  In the third example shown in FIG. 16, the second side edge 322 of the heat-shrinkable film 3 and the second side edge 42 of the primer layer 4 coincide with each other, and the second side edge 52 of the design printing layer 5 is the primer layer. 4 is arranged at a position closer to the inner edge 61 of the bonding portion 6 than the second side edge 42 of the fourth. Moreover, the 1st side edge 311 of the heat-shrinkable film 3, the 1st side edge 41 of the primer layer 4, and the 1st side edge 51 of the design printing layer 5 are arrange | positioned and corresponded. In the case of the third example, the second exposed surface 422 of the primer layer 4 is generated, but the primer layer 4 is interposed between the first side edge 51 of the design printing layer 5 and the first side edge 311 of the heat-shrinkable film 3. The back side of is not exposed.

  In the first example and the second example of the heat-shrinkable cylindrical label 1 of the third embodiment, as shown in FIGS. 14 and 15, the first exposed surface 411 of the primer layer 4 is the inner surface of the cylindrical body 21. Facing. For this reason, when the heat-shrinkable cylindrical label 1 is heat-shrinked, it is possible to prevent the design print layer on the inner surface portion facing the outer corner portion of the first side edge 311 from being damaged. In detail, the damage | wound which arises in the design printing layer 5 which comprises the inner surface of the cylindrical label 1 originates in the outer side corner | angular part of the 1st side edge 311 or the 2nd side edge 411 rubbing. In particular, when the heat-shrinkable film 3 is exposed (that is, when the outer corner of the first side edge 311 is a corner of the heat-shrinkable film 3), the design printing layer 5 is large due to rubbing. May cause scratches. In this respect, the heat-shrinkable film 3 is not exposed, and the primer layer 4 (or the design printing layer 5) is provided up to the first side edge 311 so that the outer corner of the first side edge 311 is provided. It can prevent that the design printing layer in the inner surface part which faces is damaged. In particular, when the primer layer 4 is softer than the design printing layer 5, as shown in FIGS. 14 and 15, the configuration in which the first exposed surface 411 of the primer layer 4 is formed is significant in preventing scratches. is there.

  In the illustrated example of the third embodiment, the positions of the first side edge 51 and the second side edge 52 of the design printing layer 5 are the same as those of the first side edge 41 and the second side edge 42 of the primer layer 4 and the adhesive portion 6. However, the positions of the first side edge 51 and the second side edge 52 of the design printing layer 5 are not particularly limited as long as they do not exceed the outer edge 62 of the bonding portion 6. That is, the first side edge 51 of the design print layer 5 is provided on the condition that the first side edge 51 of the design print layer 5 is disposed between the first side edge 41 of the primer layer 4 and the outer edge 62 of the adhesive portion 6. The position of can be changed as appropriate. Similarly, the second side edge of the design print layer 5 is provided on the condition that the second side edge 52 of the design print layer 5 is disposed between the second side edge 42 of the primer layer 4 and the outer edge 62 of the adhesive portion 6. The position 52 can be changed as appropriate.

[Other Embodiments]
You may combine suitably the structure illustrated by the said 1st Embodiment thru | or 3rd Embodiment.
For example, on the heat-shrinkable cylindrical label in which the first side edge 311 and the second side edge 322 of the heat-shrinkable film 3 shown in the second embodiment are not uniform, the primer layer 4 shown in the third embodiment. At least one of the first exposed surface 411 and the second exposed surface 422 may be formed.

  DESCRIPTION OF SYMBOLS 1 ... Heat-shrinkable cylindrical label, 2 ... Label base material, 21 ... Cylindrical body, 3 ... Heat-shrinkable film, 31 ... 1st side edge part, 311 ... Edge of 1st side edge part, 32 ... 2nd Side edge part, 322 ... Edge of second side edge part, 4 ... Primer layer, 41 ... First side edge of primer layer, 42 ... Second side edge of primer layer, 5 ... Design printing layer, 51 ... Design printing layer First side edge of 52, second side edge of design printed layer, 6 ... adhesion part, 61 ... inner edge of adhesion part, 62 ... outer edge of adhesion part

Claims (3)

A tubular body in which the heat-shrinkable film is formed in a cylindrical shape with the back surface of the heat-shrinkable film provided with a design printing layer on the back surface, and a first side end of the tubular heat-shrinkable film, An adhesive portion that is overlapped and adhered to the second side end portion;
A primer layer is provided between the heat-shrinkable film and the design printing layer,
In the bonding portion, the surface of the first side end portion of the heat-shrinkable film and the surface of the second side end portion of the film are bonded,
Each first side edge of the primer layer and the design print layer is disposed between an edge of the first side end portion of the film and an outer edge of the adhesive portion, and each second side edge of the primer layer and the design print layer Is a heat-shrinkable cylindrical label disposed between the edge of the second side end of the film and the outer edge of the adhesive portion.   The heat-shrinkable cylindrical label according to claim 1, wherein an edge of the first side end portion and an edge of the second side end portion of the film are uneven. The design printed layer inside the cylindrical body is overlapped with the back side of the first side end,
The first side edge of the design print layer is disposed closer to the adhesive portion side than the edge of the first side end portion of the film, and the first side edge of the design print layer and the first side end portion of the film are arranged. The heat-shrinkable cylindrical label according to claim 1 or 2, wherein a back surface of the primer layer is exposed between edges.

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