JP2010235147A - Shrink label and manufacturing method for labeled container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink label applied to a container having a constricted part in which a label restricts occurrence of air accumulation or wrinkles, and the label is applied under a superior outer appearance. <P>SOLUTION: A shrink film 10 becomes a shrink label 10 in which a thermoshrinking film is applied as a base material film and applied to a container 11 having a constricted part 14, wherein a plurality of aeration holes 16 are provided which are arranged along a direction where the base material film is shrunk under irradiation with laser against at least a part to be installed at the constricted part 14. the peripheral edges of the aeration holes 16 are provided with a thick-walled part 17 the thickness of which turns thicker than that of the circumference. It is preferable that a shape of each of the aeration holes 16 is set to an elliptic shape having a long diameter extending along a direction crossing at a right angle the direction where the base material film is shrunk. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shrink label, and more particularly to a shrink label attached to a container having a constricted portion and a method for manufacturing a labeled container.

  Shrink labels are widely used for plastic bottles filled with beverages and toiletry products. A shrink label is a label that uses a heat-shrinkable film as a base film, heat-treats the base film and causes the label shape to follow the shape of the container, and can be attached in close contact with the container shape. is there. Therefore, even if the container has a complicated shape, the label can be attached in close contact with the shape.

  For example, a label can be attached to a container having a constricted portion following the shape of the constricted portion. However, in the vicinity of both ends of the constricted portion, air (bubbles) tends to remain between the label and the container, so that a so-called air reservoir is generated, and the appearance may deteriorate. In order to suppress the occurrence of such an air reservoir, Patent Document 1 discloses a shrink label in which a small hole is provided in a portion attached to the constricted portion of the label.

  In Patent Document 1, it is described that the small hole is a small hole that has a size that allows air accumulated in the constricted portion to escape during thermal contraction and is hardly noticed. Moreover, it is illustrated that the small holes are formed by protruding with the needle tip, and a configuration in which a large number of circular small holes are provided along the circumferential direction of the constricted portion is disclosed. And in patent document 2, it is described by providing a small hole that it can suppress that a wrinkle and an air pool generate | occur | produce in a constriction part or its periphery.

JP 61-11364 A

  However, in reality, when the size of the hole (small hole) for extracting air is small as in the label of Patent Document 1, air is not easily removed and it is difficult to eliminate the air pool. On the other hand, if the hole is made too large, the hole expands in the direction of heat shrinkage during the heat shrinkage treatment, resulting in a problem of poor appearance. Further, if a large number of small holes are provided along the circumferential direction of the constricted portion, the mechanical strength of the portion is reduced due to the expansion of the holes during the overheat shrinkage treatment, and the label is easily broken. Furthermore, it is assumed that the air existing between the label and the container escapes at a stretch and wrinkles are generated. Such air pockets and wrinkles are difficult to suppress particularly in a thin film label having a thin film thickness, and it is not easy to attach the thin film label to a container having a constricted portion with a good appearance.

  As described above, since the size of the hole for extracting air is expanded by the heat shrinkage treatment of the label, it is conceivable to adjust the size of the hole in advance to an appropriate size in consideration of the expansion. Adjustment is extremely difficult. Therefore, in the conventional techniques including Patent Document 1, it is difficult to adjust an appropriate degree of air escape, and there is still room for improvement from the viewpoint of suppressing the occurrence of air accumulation and wrinkles.

  The objective of this invention is providing the shrink label which can mount | wear with a good-looking label by suppressing generation | occurrence | production of an air pool and a wrinkle with respect to the container which has a constriction part. In particular, an object is to realize suitable mounting properties even in a thin film label.

  The shrink label according to the present invention uses a heat-shrinkable film as a base film, and in a shrink label attached to a container having a constricted portion in a body portion, at least a portion attached to the constricted portion is irradiated with a laser. By providing a plurality of air holes provided along a direction orthogonal to the direction in which the base film shrinks, a thick portion where the thickness of the base film is thicker than the surroundings is provided at the periphery of the air holes. It is formed.

  Moreover, it is preferable that a ventilation hole is an elliptical shape which has a long diameter along the direction orthogonal to the direction where a base film shrinks.

  Moreover, it is preferable that one vent hole is provided at least in a portion corresponding to both ends of the constricted portion.

  Further, it is preferable that the portion attached to the portion excluding the reduced diameter portion does not have a through hole including a vent hole or the number of through holes is smaller than the portion attached to the reduced diameter portion.

  In addition, the method for manufacturing a labeled container according to the present invention includes a step of fitting a cylindrical body of a shrink label to the container, and heat-shrinking at least one end of the cylindrical body in one of the vertical directions, and mounting the container on the container; Thereafter, the step of heat shrinking the other end in the vertical direction of the cylindrical body and mounting it on the container, and then the portion corresponding to the portion excluding the reduced diameter portion by heat shrinking the central portion of the cylindrical body It is a process to heat and shrink and attach it, and from the state where air is accumulated between the cylindrical body and the container, it is attached by heat shrinking while removing the air through the vent hole, and corresponds to the constriction A step of heating and shrinking a portion to be attached, and a step of heating and shrinking while removing air through a vent from a state where air is accumulated between the label and the container. It is characterized by.

  According to the shrink label according to the present invention, a plurality of vent holes provided along a direction orthogonal to the direction in which the base film contracts by irradiating at least a portion attached to the constricted portion with a laser. A thick-walled part where the thickness of the base film is thicker than the surroundings is formed at the periphery of the vent hole. It becomes possible to suppress and attach a label with good appearance.

  In other words, air can easily collect in the constricted portion of the container, but air accumulated between the label and the container can be removed through the vent hole, so that the occurrence of air accumulation can be suppressed. Become. Even when the size of the vent hole is set to be moderately large in order to facilitate air removal, the effect of the thick wall part can suppress the spread of the vent hole during heat shrinkage, so the appearance of the label is deteriorated and mechanical It is possible to prevent the strength from being lowered and to easily adjust the vent hole size.

  Moreover, if the shape of the vent hole is an elliptical shape having a major axis along the direction perpendicular to the direction in which the base film shrinks, even in the vent hole that is difficult to spread due to the thick part, an air pool is formed. A sufficient vent hole size can be ensured.

  Further, if one vent hole is provided in each of the portions corresponding to both ends of the constricted portion, air accumulation can be suppressed particularly at both ends of the constricted portion where air easily remains.

  In addition, the portion attached to the portion excluding the reduced diameter portion does not have a through hole including a vent hole, or the number of the through holes is smaller than the portion attached to the reduced diameter portion. Since the label can be contracted from the state where air is accumulated between the container and the container through the vent hole provided in the reduced diameter portion while gradually removing the air, the wrinkle of the portion excluding the reduced diameter portion can be reduced. The suppressive effect is enhanced, and the label mounting property is further improved. In particular, since a printed layer for displaying a product name, a logo, or the like is often provided at a portion excluding the reduced diameter portion, this configuration is extremely important from the viewpoint of improving the appearance of the labeled container.

  Further, according to the method for manufacturing a labeled container according to the present invention, the shrink film is mounted by shrinking by heating while removing air from the state where air is accumulated between the cylindrical body of the shrink film and the container. Therefore, it is possible to attach the label with good appearance while suppressing the generation of wrinkles and air accumulation.

  The configuration of the shrink label according to the present invention is particularly suitable for a thin shrink label using a heat-shrinkable film having a thickness of 20 to 45 μm.

It is a figure which shows the container with a label with which the shrink label in embodiment which concerns on this invention was mounted | worn. In the labeled container of FIG. 1, it is a figure which shows the cross section cut | disconnected along the up-down direction of the labeled container through the center of each ventilation hole. In the shrink label of FIG. 1, it is a top view which shows the cylindrical body before mounting | wearing with a container. It is a figure which shows the procedure which mounts | wears the container with the shrink label of FIG.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Although the thickness of the shrink label 10 is usually as thin as about 20 to 100 μm, the thickness of the shrink label 10 in each figure is more than actual in order to clarify each component (such as the vent hole 16). It is thick.

  FIG. 1 shows a container 11 (a container with a label) to which a shrink label 10 is attached. The container 11 includes a container main body 12 filled with contents and a cap portion 13 attached to the container main body 12, and has a cylindrical shape. A constricted portion 14 is formed in a part of the container body 12. The part excluding the constricted portion 14 of the container body 12 has a shape with a uniform circumferential length and a flat circumferential surface. Hereinafter, this portion is referred to as a trunk portion 15. The constricted portion 14 is a portion where the constriction is formed, that is, the circumferential length once becomes the circumferential length of the neighboring portion as it goes upward (however, when there is a circumferential recess such that the shrink label 10 is attached to bridge) Means a portion which is smaller than (calculates the perimeter assuming that there is no dent) and is recessed (depressed) in the vertical direction where the perimeter increases again.

  The cap portion 13 is, for example, a screw cap, and a screw cap attachment portion having a content take-out port (not shown) is formed on the upper portion of the container body 12. In addition, the cap portion 13 has a curved shape so that the circumferential length gradually decreases toward the upper side of the container 11. In the following, a part where the circumference is smaller than the circumference of the neighboring part is referred to as a reduced diameter part, and in particular, the reduced diameter part on the upper side (cap part 13) of the body 11 of the container 11 is referred to as a shoulder part. The constricted portion 14 is included in the reduced diameter portion, but the shoulder portion is not recessed, but is distinguished from the constricted portion 14 in that the circumference gradually decreases toward the upper side but does not increase again.

  Hereinafter, as the container 11 to which the shrink label 10 is attached, as described above, a cylindrical container (FIG. 1) having one constricted portion 14 in the center of the container body 12 will be described as an example. Is not limited to this container 11, and for example, it has good mounting properties for various types of containers such as a form in which a plurality of constricted portions 14 are formed.

  As described above, the shrink label 10 has a heat-shrinkable film as a base film, and is heat-treated so that the base film is shrunk so that the shape of the label follows the shape of the container. This is a possible label. Therefore, as shown in FIGS. 1 and 2, the shrink label 10 can be attached to the container 11 having the constricted portion 14 in close contact with the shape of the constricted portion 14. Here, FIG. 2 is a view showing a cross section of the labeled container shown in FIG. 1 cut along the vertical direction through the centers of a plurality of vent holes 16 to be described later. In FIG. 2 (the same applies to FIG. 4), the cross-sectional display of the container 11 is omitted for clarity of the drawing.

  The resin composition that can be used for the base film (heat-shrinkable film) of the shrink label 10 is not particularly limited, and a known resin can be used. Examples of the heat-shrinkable film include heat of polyester resin (polyethylene terephthalate, polylactic acid, etc.), polyolefin resin (polyethylene, polypropylene, etc.), polystyrene resin (styrene-butadiene copolymer, etc.), polyvinyl chloride, etc. Examples thereof include a film containing one kind selected from plastic resins or a mixture of two or more kinds. Moreover, it can also be set as the laminated film with the laminated film which laminated | stacked 2 or more types of films, a nonwoven fabric, a metal vapor deposition layer, a foamed layer, etc. Of these, polyethylene terephthalate (PET), polystyrene (PS), polypropylene (PP), and laminates thereof are preferably used from the viewpoints of flexibility, stretchability, etc., and PET and PS are used. It is particularly preferred. Here, PET, PS, and PP may contain a copolymerization component and a modification component.

  The heat-shrinkable film is preferably stretched in at least one direction in order to exhibit good heat-shrinkability. The stretching ratio is preferably about 2 to 6 times in the direction corresponding to the circumferential direction of the cylindrical container 11 (the circumferential direction of the cylindrical body shown in FIG. 3), and in some cases corresponds to the longitudinal direction of the container 11. In the direction (longitudinal direction of the cylindrical body shown in FIG. 3), it is preferably about 1.01 to 2 times. In addition, as a drawing method, a roll method, a tenter method, a tube method, or the like can be used. The heat shrinkage rate of the heat-shrinkable film is preferably 20 to 80%, particularly preferably 30 to 80% with respect to the main stretching direction (heat treatment condition: 10 seconds in hot water at 90 ° C. Immersion). Moreover, it is preferably -3 to 15%, more preferably -1 to 10%, particularly preferably -1 to 5% with respect to the direction orthogonal to the main stretching direction (heat treatment condition: hot water at 90 ° C. For 10 seconds).

  On the surface of the heat-shrinkable film, a print layer 19 adjusted to a desired hue such as a character or pattern representing a product name or product image can be formed. For the formation of the print layer 19, gravure printing or flexographic printing Well-known methods such as letterpress printing, lithographic printing and stencil printing can be applied. Desired pigments and dyes, a binder resin called a vehicle (acrylic resin, urethane resin, vinyl acetate resin, cellulose resin, polyolefin resin, polyamide resin, etc.), an organic solvent (ester solvent, alcohol solvent, and A mixture of a ketone solvent or the like and an additive (wax, plasticizer, leveling agent, surfactant, dispersant, antifoaming agent, etc.) is used as the ink. In addition, it is preferable that the thickness of the printing layer 19 is 0.5-25 micrometers, More preferably, it is 1-10 micrometers. As shown in FIG. 2, the printed layer 19 is usually preferably provided on the film surface on the side in contact with the container 11.

  In FIG. 1 and FIG. 3, the print layer 19 is indicated by a mesh. Here, FIG. 3 is a plan view showing a cylindrical body of the shrink label 10. In FIG. 3, a portion attached to the constricted portion 14 of the container 11 is shown as 14L, a portion attached to the trunk portion 15 is indicated as 15L, and a portion attached to the shoulder portion (cap portion 13) is indicated as 13L. The print layer 19 is mainly provided in the portion 15L attached to the trunk portion 15, but can also be provided in the portion 13L attached to the shoulder portion and the portion 14L attached to the constricted portion 14 of the container 11. Note that the cylindrical body of the shrink label 10 is coated with an organic solvent such as tetrahydrofuran on one side edge of a rectangular label, and the other side edge is overlapped on the application part (bonding the center seal). And the formed bonded portion is referred to as a center seal portion 18). At this time, the heat-shrinkable film is cylindrically formed so that the main stretching direction, that is, the direction in which the heat-shrinkable film shrinks is the circumferential direction.

  As shown in FIG. 3 and the like, the shrink label 10 is irradiated along the direction orthogonal to the direction in which the base film (label) contracts by irradiating at least the portion 14L attached to the constricted portion 14 with a laser. A plurality of vent holes 16 provided. Here, the direction orthogonal to the direction in which the base film contracts is the direction along the vertical direction of the container 11 (the vertical direction of the cylindrical body). The ventilation hole 16 is a through hole (FIG. 2) for removing air remaining in a reduced diameter portion such as the constricted portion 14 during the heat shrinking process.

  A plurality of ventilation holes 16 can be provided in the constricted portion 14, but as shown in FIG. 1 and the like, portions corresponding to the upper and lower ends of the constricted portion 14, that is, 14L along the vertical direction of the cylindrical body (FIG. 3). A form in which at least one each is provided at both ends of each is more preferable. In the constricted portion 14, the portion where air accumulation is particularly likely to occur is both ends approaching from the constricted portion 14 to the body portion 15. When the vent holes 16 are provided in portions corresponding to both ends of the constricted portion 14, the constricted portion 14 is generated at this portion. It is possible to suppress air accumulation. Further, as will be described in detail later, also in the constricted portion 14, by reducing the number of the vent holes 16, the label can be contracted while accumulating air, and the effect of suppressing wrinkles can be enhanced. For this reason, although it depends on the size of the constricted portion 14, the number of the vent holes 16 provided in 14L is preferably 2 to 10, and more preferably 2 to 5.

  In addition to the constricted portion 14, the vent hole 16 is, for example, as shown in FIG. 3, a portion 13 </ b> L corresponding to the shoulder portion, specifically, a portion that starts to reduce in diameter from the trunk portion 15 (the lower end of the shoulder portion). Part). This is because, in the reduced diameter portion such as the shoulder portion, an air pool is likely to occur as in the case of the constricted portion 14. Accordingly, the shrink label 10 shown in FIG. 1 and the like is provided with a row of three vent holes 16 along the vertical direction of the container 11. Although a plurality of rows of vent holes 16 provided along the vertical direction of the container 11 can be provided, a single row is preferable from the viewpoints of suppressing wrinkles and reducing mechanical strength.

  On the other hand, in a portion excluding the reduced diameter portion such as the constricted portion 14 and the shoulder portion, for example, a portion 15L attached to the body portion 15 where the printing layer 19 is provided, a through hole such as a vent hole 16 or a perforation line is provided. It is preferable to reduce the number of through-holes as compared with a portion that is not provided or is attached to the reduced diameter portion. As will be described in detail later, if there is no through-hole, the air gradually accumulates from the state where air is accumulated between the cylindrical body of the label and the container 11 through the vent hole 16 provided in the reduced diameter portion. This is because the tubular body can be contracted while removing the wrinkles, so that the effect of suppressing wrinkles is enhanced particularly in the body portion 15.

  Moreover, it is preferable that the ventilation hole 16 is elliptical shape which has a long diameter along the direction orthogonal to the direction where a base film shrinks. As will be described later, the elliptical air holes 16 can be formed by controlling the length of the long diameter and the like by adjusting the irradiation time of the laser beam while transferring the long base film. For example, when the film transfer speed is the same, the longer diameter of the vent hole 16 can be increased by increasing the laser beam irradiation time. Here, the ellipse does not have a strict meaning of a locus of points where the sum of distances from two fixed points is constant, and one of them may be a long, substantially circular shape, and includes an oval shape having a partially straight line. It is.

  Specifically, the major axis of the elliptical shape is 0.3 to 2.0 mm, preferably 0.5 to 1.0 mm. The minor axis is 0.1 to 1.0 mm, preferably 0.2 to 0.5 mm. By making the shape of the vent hole 16 into such an elliptical shape, it is possible to ensure a sufficient size of the vent hole 16 to suppress air accumulation even in the vent hole 16 that is difficult to spread due to the thick portion 17. Can do.

  As described above, the vent hole 16 is formed by irradiating a portion where the vent hole 16 is to be provided with a laser beam. When a laser beam with a predetermined output is focused on a minute region of the base film constituting the shrink label 10, the portion is instantaneously dissolved or evaporated to form a through hole. Since the air holes 16 are provided along a direction orthogonal to the direction in which the base film shrinks, the air holes are continuously formed by scanning the base film in that direction and irradiating a laser beam at an appropriate position. 16 can be formed.

  Examples of the laser suitable for forming the air holes 16 include a carbon dioxide laser, an argon laser, and a YAG laser. Among these, it is particularly preferable to use a carbon dioxide laser from the viewpoints of easily obtaining high energy and being easily absorbed by a polyester resin film such as PET.

  A thick portion 17 in which the thickness of the base film is thicker than the surroundings is formed at the periphery (portion indicated by a dotted line in FIG. 1 and the like) of the vent hole 16. The thick portion 17 is formed, for example, when the base film dissolved at the irradiation position flows to the periphery of the irradiation position (periphery of the ventilation hole 16) when the ventilation hole 16 is formed by irradiation with a laser beam. It has been done. Such a thick-walled portion 17 is not easily deformed even when subjected to tension due to the heat shrinkage process. Therefore, the vent hole 16 whose periphery is guarded by the thick portion 17 is not easily deformed during the heat shrinking process, and the expansion of the vent hole 16 in the direction in which the base film contracts is suppressed.

  A procedure for manufacturing the labeled container by mounting the shrink label 10 having the above configuration on the container 11 will be described with reference to FIG. 4 (print layer 19 is omitted for clarity of the drawing). In FIG. 4, a cylindrical body cut to a size to be attached to one container 11 is shown. In the pre-process of the process shown in FIG. 4 (a), the step of forming the printing layer 19 on the surface of the long base film mainly stretched in the width direction, the long base material on which the printing layer 19 is formed. The step of slitting the film into the width of one label, the slit-like long base film is formed into a cylinder, and the center seal portion 18 is formed by overlapping and adhering both ends in the width direction. The process of forming a cylindrical body and the process of cut | disconnecting an elongate cylindrical body to the size shown to Fig.4 (a), and obtaining one cylindrical body are included.

  In addition, the air holes 16 may be formed in any process, for example, after the long cylindrical body is formed and before being cut into one cylindrical body. For example, laser beam irradiation can be performed under continuous transfer of a long cylindrical body to be sent out. Specifically, the position where the air holes 16 are to be formed on the surface of the long base film transferred at a constant speed is detected, and the laser beam is turned ON / OFF at a predetermined timing, or the output is high / low, etc. This is done by controlling.

  As shown in FIG. 4 (a), the shrinkable label 10 (cylindrical body) formed with the air holes 16 and cut to the size to be attached to one container 11 is attached to the container 11. It starts from the place that fits into the container 11. The cylindrical body is cut to such a length that the lower end slightly wraps around the bottom edge of the container 11 and the upper end is attached to about half of the cap part 13 (shoulder part of the container 11). The center seal is performed so as to be slightly larger than the diameter of the body portion 15 of the container 11.

  4B to 4E sequentially show processes for performing the heat shrinkage process for each part of the container 11. As shown in FIG. 4B, first, one end in the vertical direction of the cylindrical body fitted on the container is mounted on the container 11. Preferably, the lower end side of the cylindrical body is heated and shrunk and attached to the lower portion of the container 11 (below the lower portion 15 or the lower end). The heat shrinking process is performed by blowing hot air of about 200 ° C. or steam of about 90 ° C. on the shrink label 10 so that the hot air is uniformly blown in the circumferential direction of the cylindrical body. . In this way, by attaching the lower part of the cylindrical body to the container 11, it is possible to prevent the cylindrical body from jumping up during the subsequent heat shrinkage treatment.

  Next, the other end in the vertical direction of the cylindrical body is attached to the container 11. Preferably, as shown in FIG.4 (c), after mounting | wearing with the lower end side of a cylindrical body, the upper end of a cylindrical body is above the trunk | drum 15 of the container main body 12, or an upper end (shoulder part of the container main body 12). It is made to heat-shrink and is attached to the container 11. The portion 15L corresponding to the lower body portion 15 may be contracted first, but as shown in the figure, the portion 13L corresponding to the shoulder portion is attached to the container 11 and the upper and lower ends of the cylindrical body are closed. By setting it as a state, it becomes easy to accumulate air between the container 11 and a cylindrical body, and can suppress the wrinkle suppression effect. Here, the state in which the upper and lower ends are closed is not a state in which the upper and lower ends are completely sealed, and follows the outer shape of the container 11 at the upper and lower ends so that the amount of air that escapes from the upper and lower ends is limited. It means that the cylindrical body is mounted. When the portion 13L corresponding to the shoulder is heated and shrunk, air escapes from the 13L vent hole 16 and the occurrence of air accumulation is suppressed.

  Finally, the central part of the cylindrical body is attached to the container 11. Here, a cylindrical body is attached to the body portion 15 and the constricted portion 14 of the container 11. First, as shown in FIGS. 4D and 4E, the portion 15 </ b> L corresponding to the body portion 15 is heated and contracted and attached to the container 11. In this step, the heat shrinkage is performed while gradually removing the air from the vent hole 16 from the state where the air is accumulated between the container 11 and the cylindrical body. In this manner, the generation of wrinkles can be suppressed by gradually extracting air, and the occurrence of air pools can also be suppressed by finally extracting air. That is, the vent hole 16 has a function of suppressing the generation of wrinkles and air pools even in the body portion 15.

  Next, the portion 14L corresponding to the constricted portion 14 is heated and shrunk from the state shown in FIG. 4E and attached to the container 11 so that the shrink label 10 shown in FIG. Can be obtained. Also in the step of attaching the portion 14L corresponding to the constricted portion 14 by heat shrinking, the air shrinkage is carried out while venting the air from the air hole 16 from the state where the air is accumulated between the container 11 and the cylindrical body. In this manner, the generation of wrinkles can be suppressed by gradually extracting air, and the occurrence of air pools can also be suppressed by finally extracting air.

  As described above, the shrink film 10 is orthogonal to the direction in which the base film contracts by irradiating the laser to the portions attached to both ends of the constricted portion 14 and the portions attached to the shoulder portion. There are vent holes 16 along the direction, and a thick portion 17 in which the thickness of the base film is increased is formed at the periphery of each vent hole 16, so that the vent holes 16 can be expanded during the heat shrinking process. It is possible to suppress the deterioration of the appearance and the label strength, and it is easy to adjust the size of the vent hole 16. Therefore, with respect to the container having the constricted portion 14, there is an effect that the label can be attached with a good appearance by suppressing the generation of wrinkles of the label and the accumulation of air. Furthermore, by making the shape of the air holes 16 into an elliptical shape having a major axis along a direction orthogonal to the direction in which the base film contracts, the above effect appears more remarkably.

  DESCRIPTION OF SYMBOLS 10 Shrink label, 11 Container, 12 Container main body, 13 Cap, 14 Constriction part, 15 Trunk part, 16 Vent hole, 17 Thick part, 18 Center seal part, 19 Print layer.

Claims (5)

In a shrink label attached to a container having a constricted portion, using a heat-shrinkable film as a base film,
By irradiating a laser to at least the portion attached to the constricted portion, the plurality of vent holes provided along the direction orthogonal to the direction in which the base film shrinks are provided,
A shrink label, characterized in that a thick portion in which the thickness of the base film is thicker than the surrounding is formed at the periphery of the vent hole. The shrink label according to claim 1,
A shrink label, wherein the vent hole has an elliptical shape having a major axis along a direction orthogonal to a direction in which the base film shrinks. The shrink label according to claim 1 or 2,
One shrink hole is provided in each part corresponding to the both ends of a constriction part, and the shrink label characterized by the above-mentioned. In the shrink label of any one of Claims 1-3,
The shrink label characterized by not having a through-hole including a ventilation hole in the part mounted | worn except a reduced diameter part, or making the number of through-holes smaller than the part mounted | worn with a reduced diameter part. In the manufacturing method of the labeled container in which the shrink label of any one of Claims 1-4 was mounted | worn to the container,
A process of fitting the cylindrical body of the shrink label onto the container, and heat-shrinking at least one end in the vertical direction of the cylindrical body to attach to the container;
Thereafter, the step of heat shrinking the other end of the cylindrical body in the vertical direction and mounting it on the container,
Thereafter, the center portion of the cylindrical body is heated and shrunk to heat and shrink the portion corresponding to the portion excluding the reduced diameter portion, and air is collected between the cylindrical body and the container. A process of heating and shrinking while removing the air from the state through the vent,
A step of heat shrinking and mounting a portion corresponding to the constricted portion, and a step of heat shrinking and mounting while removing air from the state where air is accumulated between the label and the container,
A method for producing a labeled container, comprising:

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