JP2012013943A - Roll shrink label and method of manufacturing container with roll shrink label - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll shrink label which can be released without being torn in a wraparound direction when being released from a perforated line, and a method of manufacturing a container with the roll shrink label.SOLUTION: The present invention relates to a roll shrink label which is mounted while being wound around an outer circumferential surface of a body of a container. The roll shrink label is comprised of a biaxially stretched film and a perforated line is provided in a direction orthogonal to a wraparound direction. It is preferable that a thermal shrinkage at 100°C in the wraparound direction of the biaxially stretched film is 10% or more, furthermore, it is preferable that a hot melt or an ultraviolet curing type hot melt is applied to an adhesion part of the shrink label and the container and that an ultraviolet curing type hot melt is applied to an adhesion part of a starting terminal portion and an ending terminal portion of the shrink label, and moreover, it is also preferable that the shrink label starting terminal and ending terminal portions are welded by a carbon dioxide laser.

Description

  The present invention relates to a roll shrink label and a method for producing a container with a roll shrink label, and more specifically, with a roll shrink label and a roll shrink label that can be peeled without tearing in the body winding direction when peeling the label from the perforation. The present invention relates to a container manufacturing method.

  2. Description of the Related Art Conventionally, a cylindrical shrink label that covers the entire circumference of a container such as a beverage has been used. As a container equipped with such a cylindrical shrink label, a method is known in which a cylindrical shrink label is manufactured in advance, and is externally fitted on the outer periphery of the container, and then heat-treated to form a shrink (for example, Patent Document 1). ). In patent document 1, when manufacturing a cylindrical shrink label, a solvent or an adhesive agent is apply | coated to the both ends of a shrink label, and both ends of a label are bonded together cylindrically.

  On the other hand, there is also known a method in which when a shrink label is bonded in a cylindrical shape, it is welded by laser light, and the obtained roll shrink label is externally attached to a container (for example, Patent Document 2). The label used in Patent Document 2 is a cylindrical shrink label formed in a cylindrical shape by overlapping both ends of a printed synthetic resin film and welding by irradiation with laser light, and a base material, The surface layer is made of a material having a melting point lower than that of the base material, and the welded surfaces at both ends have no printed layer. Is formed.

JP 2006-117269 A JP 2000-141469 A

  However, as in Patent Document 1 and Patent Document 2, when an ultraviolet curable hot melt or laser is used for bonding the shrink label, a perforation is required for peeling the cylindrical shrink label. Here, since the shrink label contracts in the stretching direction, the cylindrical shrink label needs to match the stretching direction and the body winding direction (circumferential direction). When a laterally uniaxially stretched film is used as the substrate, a process of forming a cylindrical shape after rotating the shrink label by 90 ° is required in order to match the stretching direction and the body winding direction.

  In order to omit such a process, a longitudinal uniaxially stretched film is used as a base material, the stretching direction of the roll shrink label is the same as the transport direction, the film is cut into a predetermined shrink label length, and then the cut surface is cut. A method of manufacturing a roll shrink label as the joint is conceivable. However, when a roll shrink label manufactured from a longitudinally uniaxially stretched film is to be peeled from the perforation, the perforation and the stretching direction do not coincide with each other, so that the roll shrink label is torn in the body winding direction.

  Then, the objective of this invention is providing the manufacturing method of the roll shrink label and container with a roll shrink label which can be peeled without tearing in a body winding direction, when peeling a label from a perforation.

  In order to solve the above-mentioned problems, the present inventor has intensively studied the material and manufacturing process of the roll shrink label, and as a result, finds that the above-mentioned problems can be solved by the following configuration, and completes the present invention. It came to.

That is, the roll shrink label of the present invention is a roll shrink label that is wound around the outer peripheral surface of the body of the container.
It consists of a biaxially stretched film, and is provided with the perforation in the direction orthogonal to the body winding direction.

  In the present invention, the heat shrinkage rate at 100 ° C. in the body winding direction of the biaxially stretched film is preferably 10% or more. Further, in the present invention, hot melt or ultraviolet curable hot melt is applied to the bonded portion between the shrink label and the container, and the ultraviolet curable type is applied to the bonded portion between the start and end portions of the shrink label. It is preferable to apply a hot melt. Furthermore, in the present invention, it is preferable that the shrink label start and end portions are welded by a carbon dioxide gas laser. Furthermore, in the present invention, the biaxially stretched film is selected from the group consisting of a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, and a laminate film of two or more of these films. Preferably it is a seed. Furthermore, it is preferable that the heat shrinkage rate at 100 ° C. in the direction orthogonal to the body winding direction of the biaxially stretched film is 0 to 15%.

Furthermore, the manufacturing method of the container with a roll shrink label of the present invention includes a transporting process for transporting the roll shrink label original fabric, and a cutting process for manufacturing the shrink label by cutting the roll shrink label original fabric into a predetermined length. In the method of manufacturing a container with a roll shrink label, including a mounting step of mounting a roll shrink label on the container,
The roll shrink label original fabric is a biaxially stretched film, and a die cut roll or laser irradiation having a perforated cutting edge simultaneously with, immediately before, or offline with the cutting of the biaxially stretched film in the cutting step. A perforation is provided in the width direction.

  In the roll shrink label manufacturing method of the present invention, the mounting step applies hot melt or UV curable hot melt to the start end of the shrink label, and UV curable hot melt to the end of the shrink label. An adhesive application step of applying the adhesive, and bonding the starting end portion and the container, winding the shrink label around the container, and bonding the starting end portion and the terminal end portion to form a roll shrink label; An ultraviolet irradiation process for irradiating the container to which the roll shrink label is bonded with ultraviolet light to cure the adhesive; and a heat shrinking process for performing a heat shrink process on the container to which the roll shrink label is bonded. It is preferable, or the mounting step forms an overlapping cylinder shape at both ends where the shrink label is cut. A welding step in which the overlap portion is welded with a carbon dioxide laser beam to form a roll shrink label; and an insertion step in which the container is inserted from the upper side or the lower side of the roll shrink label and the roll shrink label is attached to the container; And a heat shrinking step of heat shrinking the container equipped with the roll shrink label. Moreover, it is preferable that the thermal contraction rate in 100 degreeC of the trunk winding direction of the said biaxially stretched film is 10% or more. Furthermore, in this invention, the said biaxially stretched film is 1 type chosen from the group which consists of a polyolefin-type film, a polyester-type film, a polystyrene-type film, a polylactic acid-type film, and the laminated film of 2 or more types of these films. It is preferable that Furthermore, it is preferable that the heat shrinkage rate at 100 ° C. in the direction orthogonal to the body winding direction of the biaxially stretched film is 0 to 15%.

  ADVANTAGE OF THE INVENTION According to this invention, when peeling a label from a perforation, the manufacturing method of the roll shrink label and container with a roll shrink label which can be peeled without tearing to a body winding direction can be provided.

(A)-(d) is the one part schematic of the manufacturing process in one suitable embodiment of the manufacturing method of the container with a roll shrink label of this invention, (a) is a conveyance process, (b) is cutting | disconnection. (C) shows an adhesive application process, (d) shows an adhesion process. (A)-(d) is the one part schematic of the manufacturing process in other suitable embodiment of the manufacturing method of the container with a roll shrink label of this invention, (a) is a conveyance process, (b) is In the cutting process, (c) and (d) show a shrink label welding process.

Hereinafter, preferred embodiments of the present invention will be described in detail.
The roll shrink label of the present invention is a roll shrink label that is wound around and mounted on the outer peripheral surface of the body of the container. The roll shrink label is made of a biaxially stretched film and has a perforation in a direction perpendicular to the body winding direction. It is important that By using a biaxially stretched film as the base material, heat shrinkage in the drum winding direction is possible, and also in the direction perpendicular to the drum winding direction, the roll shrink label can be easily peeled off. it can. Thereby, when peeling a roll shrink label from the perforation which was a subject, the problem that a shrink label tears in a body winding direction can be solved.

In the present invention, the thermal shrinkage rate at 100 ° C. in the body winding direction of the biaxially stretched film is preferably 10% or more. When the thermal shrinkage rate in the body winding direction at 100 ° C. is less than 10%, sufficient thermal shrinkage may not be obtained as a shrink label. It is preferably 10 to 65%. Here, the heat shrinkage rate is defined by the following equation.
Thermal contraction rate (%) = (dimension before heating−dimension after heating) / (dimension before heating) × 100

  Moreover, in this invention, it is preferable that the thermal contraction rate in 100 degreeC of the direction orthogonal to the body winding direction of a biaxially stretched film is 0 to 15%. If the heat shrinkage rate at 100 ° C. in the direction orthogonal to the body winding direction is less than 0%, it may be difficult to peel the roll shrink label along the perforation. On the other hand, if it exceeds 15%, the appearance after heat shrinkage may be deteriorated. In the present invention, the shrinkage rate in the body winding direction and the heat shrinkage rate in the direction perpendicular to the body winding direction satisfy the above range, and the shrinkage rate in the body winding direction and the heat shrinkage in the direction perpendicular to the body winding direction. Any of the rates may be large.

  In the roll shrink label of the present invention, hot melt or ultraviolet curable hot melt is applied to the bonded portion between the shrink label and the container, and the ultraviolet curable hot melt is applied to the bonded portion between the start end and the end of the shrink label. It is preferable that a melt is applied. Since UV curable hot melts are cured by UV irradiation, if they are used as adhesives, the adhesive does not melt even in high temperature atmospheres such as heat shrinking processes after curing, and a heat shrinking process is required. It can be suitably used for a roll shrink label. In addition, the ultraviolet curable hot melt can be cured in a short time unlike the reactive hot melt, and the productivity can be improved. In the heat treatment step or the like, if there is no fear of melting of the adhesive, hot melt that is not an ultraviolet curable type may be used for the bonded portion between the shrink label and the container.

  In order to apply a hot melt or an ultraviolet curable hot melt, there are a roll coater method using an direct roll or a gravure roll, an extrusion coater method, a slit orifice coater method, etc. Good. Alternatively, a method of removing the solvent after dissolving and applying the hot melt or ultraviolet curable hot melt in a solvent may be used. For example, in order to apply hot melt or the like to the adhesive part of a roll shrink label, hot melt or the like is applied to a laminated film in which a design printing layer or an outer layer is previously formed on a base film using a hot melt coater or a hot melt applicator. The method can be adopted.

  In the roll shrink label of the present invention, it is also preferable that the start end and the end end of the shrink label are welded by a carbon dioxide laser. If the shrink label overlapping portion is welded with carbon dioxide laser light, the transparent resin film can be efficiently welded in a short time without using an adhesive. In particular, when the carbon dioxide laser is defocused and irradiated, the label overlap portion can be stably and widely welded, and a roll shrink label having excellent adhesive strength can be manufactured.

  In the present invention, as the biaxially stretched film, generally one or more of a polyolefin resin, a polyester resin, a polystyrene resin, and a polylactic acid resin are used, and an extrusion method, a cast molding method, T A film formed as a single layer using a film forming method such as a die method, a cutting method, an inflation method, or the like, or a multilayer film formed by coextrusion using two or more resins, or two types In the present invention, a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, and two or more of these films can be used. It is preferable that it is 1 type chosen from the group which consists of these laminated films. More preferably, the polyolefin film may be a polypropylene film, and the polyester film may be a polyethylene terephthalate film.

  In the present invention, the thickness of the biaxially stretched film is not particularly limited, but may be appropriately selected within a range not impairing heat resistance, rigidity, mechanical suitability, appearance, etc., and may be, for example, 15 to 50 μm. If it is within the above range, sufficient mechanical strength can be secured when used in a container, and the welding strength is excellent with a carbon dioxide laser beam or the like. In addition, the thickness of a biaxially stretched film is a film thickness before heat shrink.

  Note that various additives such as lubricants, fillers, heat stabilizers, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, and colorants may be added to the biaxially stretched film as necessary. Good. The surface of the biaxially stretched film may be subjected to conventional surface treatment such as corona discharge treatment, plasma treatment, flame treatment, acid treatment, etc., in order to improve the printability.

Next, the manufacturing method of the container with a roll shrink label of this invention is demonstrated.
The method for producing a container with a roll shrink label according to the present invention includes a transporting process for transporting a roll shrink label original, a cutting process for manufacturing a shrink label by cutting the roll shrink label original into a predetermined length, and a roll shrink. A mounting step of mounting the label on the container. In the present invention, the roll shrink label original fabric is a biaxially stretched film, and a die cut roll having a perforated cutting edge at the same time or immediately before cutting the biaxially stretched film in the cutting step or offline. It is important to provide perforations in the width direction by laser irradiation. Thereby, the above-mentioned roll shrink label of the present invention can be manufactured.

  Hereafter, the procedure of the manufacturing method of the container with a roll shrink label of this invention is demonstrated. Drawing 1 (a)-(d) is a schematic diagram of a part of manufacturing process of one suitable embodiment of a manufacturing method of a container with a roll shrink label of the present invention. Fig.1 (a) has shown the conveyance process which conveys a biaxially stretched film, the biaxially stretched film 2 pulled out from the original fabric roll 1 is maintained constant, and biaxially stretched film 2 is predetermined. Are continuously supplied to a cutting device (not shown) that cuts at a size of.

  Next, in the cutting step (see FIG. 1B), the continuously supplied biaxially stretched film 2 is cut into a predetermined length, and the shrink label 3 is manufactured. In the present invention, the perforations 4 are provided in the width direction by die cutting rolls having a perforated cutting blade or by laser irradiation at the same time or immediately before the cutting of the shrink label 3 or offline. Conventionally, since a laterally uniaxially stretched film is used as a base material for a shrink label, when a wide shrinkable laterally uniaxially stretched film is slit to a predetermined width size to produce a shrink label original fabric, it is continuously sewn in the flow direction. It was possible to have eyes. However, when a longitudinally uniaxially stretched film is used, it is difficult to provide a perforation at the roll shrink label original fabric production stage because the angle of the perforation rotates 90 °. Therefore, as shown in FIG. 1 (b), a die-cut having a perforated cutting edge using a biaxially stretched film as a base film and simultaneously or immediately before cutting the biaxially stretched film or offline. A perforation 4 is provided in the width direction by roll or laser irradiation.

  When providing a perforation simultaneously with the cutting of the biaxially stretched film, a cutting rotary having a perforated cutting blade may be used. When a perforation is provided immediately before cutting a biaxially stretched film (not shown), a die cut rotary for perforating is separately installed immediately before the rotary for cutting a biaxially stretched film to perform perforation. Then, a method of cutting the biaxially stretched film or a method of perforating with a carbonic acid laser immediately before the rotary for cutting the biaxially stretched film can be employed.

  When using a die cut roll, it processes to the shrink label original fabric after label printing or after slitting a wide and long biaxially stretched film. In the case of using a carbonic acid laser, similarly to the case of using a die cut roll, the label printing may be followed by processing after the slit, or may be performed after the welding step.

Here, a perforation processing method using a die cut rotary will be described.
On the outer peripheral surface of the die cut roll used in the present invention, perforated cutting blades are provided at a predetermined pitch. Moreover, this die cut roll is provided with the anvil roll which pinches | interposes a biaxially stretched film, and a biaxially stretched film is sent between a die cut roll and an anvil roll. Therefore, when the biaxially stretched film passes between the die cut roll and the anvil roll, the perforations are formed at a predetermined pitch by the perforated cutting blades of the rotating die cut roll.

Next, a perforation processing method for forming perforations by laser irradiation will be described.
In the present invention, the laser may be an argon laser, a YAG laser, or the like, but a carbon dioxide laser can easily obtain a high output (energy) and can be suitably used for perforation formation in the present invention. When a laser is applied to a minute region of the biaxially stretched film, the minute region is instantaneously dissolved or evaporated to generate a fine hole or a concave thin wall portion. Thereby, a perforation can be formed in a biaxially stretched film.

  By controlling irradiation conditions such as laser output, beam focus depth, scanning speed (film transfer speed), beam ON / OFF cycle, the perforation hole diameter, pitch, etc. can be adjusted. Moreover, even if printing (a brand name, a design, etc.) is given to the film, it does not interfere with laser irradiation, and either the printed surface or the non-printed surface may be used as the irradiated surface.

  When a perforation is provided using a laser, the perforation is formed by the thermal energy of the laser, so unlike a mechanical method (punching with a perforated cutting blade), a roll shrink label is attached to a bottle or the like. Defects such as microcracks, which are the starting points of film breakage in the heat shrinking process, can be suppressed, and the roll shrink label can be mounted well. Also, if a perforation is formed using a laser, sharp edges such as a cut line by a blade will not be generated, film damage will not occur due to stress concentration, and stress concentration at the time of roll shrink label mounting will be avoided, A roll shrink label having excellent breakage resistance can be produced. For this reason, since the pitch of a perforation can be made small, peelability can be improved more effectively. In addition, when providing a perforation using a laser, you may carry out with respect to the cylindrical roll shrink label obtained by the welding process mentioned later.

  Thus, the shrink label cut | disconnected by the predetermined length is sent to a mounting process. In the present invention, the mounting step includes applying an adhesive or a UV curable hot melt to the start end portion of the shrink label, and applying an UV curable hot melt to the end portion of the shrink label; Bonding part and container, winding the shrink label around the container, bonding the start and end parts to form a roll shrink label, and irradiating the container to which the roll shrink label is bonded with ultraviolet rays An ultraviolet irradiation process for curing the agent, and a heat shrinking process for performing a heat shrinking process on the container to which the roll shrink label is bonded.

  That is, as shown in FIG. 1 (c), the shrink label 3 cut to a predetermined length is hot melt or ultraviolet curable hot melt as an adhesive 7 at the start end portion 5 of the shrink label in the adhesive application step. And an ultraviolet curable hot melt is applied to the end portion 6 of the shrink label 3. In addition, as for the application | coating of these adhesive agents, you may use any application | coating method as above-mentioned. For example, a roll coater method using a direct roll or a gravure roll, an extrusion coater method, a slit orifice coater method, or the like can be used. Alternatively, a method of removing the solvent after dissolving the hot melt or the ultraviolet curable hot melt in a solvent and coating may be used.

  In the shrink label adhering step, as shown in FIG. 1 (d), the start end 5 of the shrink label 3 coated with the adhesive 7 and the container 8 are adhered, the shrink label 3 is wound around the container, and the shrink label 3 The start end portion 5 and the end end portion 6 are bonded together. Thus, the shrink label 3 is bonded to the container 8 to form a container with a roll shrink label.

In the ultraviolet irradiation process, ultraviolet rays are irradiated by an ultraviolet irradiation device, and the adhesive is fixed. In the present invention, for example, the adhesive is cured by irradiating 30 to 500 mJ / cm ² with ultraviolet rays as an integrated light quantity.

  Thereafter, the container to which the roll shrink label is bonded is sent to a heat shrinking process where heat is applied to shrink the roll shrink label in the body winding direction. For example, hot air of 60 to 220 ° C., steam heated by steam and steam from which water vapor is condensed, or radiant heat such as infrared rays is applied. Thereby, the container with a roll shrink label by which the trunk | drum of the container was coat | covered with the roll shrink label can be manufactured.

  In the present invention, the biaxially stretched film that is the base film can be easily cut and the adhesive applied to the shrink label by simply moving the base film in the horizontal direction, and can be applied to a vertically arranged container. For example, the shrink label can be formed into a cylindrical shape smoothly and easily, and a container with a roll shrink label can be easily manufactured.

  As another preferred embodiment of the method for producing a container with a roll shrink label of the present invention, the mounting step forms both ends of the shrink label cut into a cylindrical shape, and the overlapped portion is welded with a carbon dioxide laser beam. Welding process to make a roll shrink label, insertion process to insert a container from the upper side or lower side of the roll shrink label and attaching the roll shrink label to the container, and heat shrinking to heat shrink the container with the roll shrink label And a process. The procedure of another preferred embodiment of the present invention will be described below. 2A to 2D are schematic views of a part of the manufacturing process in another preferred embodiment of the method for manufacturing a container with a roll shrink label of the present invention. 2 (a) and 2 (b) are a conveying process and a cutting process, and since they are the same as described above, description thereof is omitted.

  The shrink label manufactured through the conveyance process and the cutting process is sent to the shrink label welding process. 2 (c) and 2 (d) show a shrink label welding process. As a method of forming the shrink label 3 into a cylindrical shape, the shrink label 3 is wound around a cylinder 9 as shown in FIG. The method of forming the overlapping part 10 (refer FIG.2 (d)) of the cut end of the label 3 is mentioned. Thereafter, a carbon dioxide laser welding portion is formed on the overlapping portion 10 at the cut end of the shrink label 3 from the outside toward the cylinder 9 to be welded in a cylindrical shape. Thereby, the roll shrink label 11 can be manufactured.

  Next, in the container insertion step, the container 8 is inserted from the upper side or the lower side of the roll shrink label 11 and the roll shrink label 11 is attached to the container 8. For example, the cylinder 9 is pulled out from below. Specifically, if a large number of air holes are provided in the cylinder 9 and the air is discharged from the air holes of the cylinder 9 after welding with a carbon dioxide laser beam, the air is discharged between the cylinder 9 and the roll shrink label 11. Can be sent. When the cylinder 9 is moved downward from the lower end of the roll shrink label 11 in this state, the cylinder 9 can be easily pulled out from the roll shrink label 11. The container is lowered from the upper part of the roll shrink label 11, and the roll shrink label 11 is attached to the container. Alternatively, the cylinder 9 may be pulled out from the upper side of the roll shrink label 11 and the container may be inserted from the lower side.

  Subsequently, a heat shrink process is performed with respect to the container with a roll shrink label. Since the heat shrink process is the same as the heat shrink process described above, the description thereof is omitted.

  In the present invention, the biaxially stretched film that is the base film can be cut and the shrink label can be cylindrically welded by simply moving the base film in the horizontal direction. The label can be formed into a cylindrical shape smoothly and easily, and a container with a roll shrink label can be easily manufactured by irradiating carbon dioxide laser light from the outside of the cylinder.

  As described above, in the method for producing a container with a roll shrink label of the present invention, it is preferable that the thermal shrinkage rate at 100 ° C. in the body winding direction of the biaxially stretched film is 10% or more. It is because sufficient heat shrinkage may not be obtained when the heat shrinkage rate in the body winding direction at 100 ° C. is less than 10%. It is preferably 10 to 65%. Moreover, it is preferable that the thermal contraction rate in 100 degreeC of the direction orthogonal to the body winding direction of a biaxially stretched film is 0 to 15%. If the heat shrinkage rate at 100 ° C. in the direction orthogonal to the body winding direction is less than 0%, it may be difficult to peel the roll shrink label along the perforation. On the other hand, if it exceeds 15%, the appearance after heat shrinkage may be deteriorated.

  In addition, as the biaxially stretched film, generally, one or more of a polyolefin resin, a polyester resin, a polystyrene resin, and a polylactic acid resin are used, and an extrusion method, a cast molding method, a T-die method, A film formed as a single layer using a film-forming method such as a cutting method, an inflation method, or the like, a film formed into a multilayer film by coextrusion using two or more resins, or two or more resins In the present invention, a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, and a laminate film of two or more of these films can be used. It is preferable that it is 1 type chosen from the group which consists of. More preferably, the polyolefin film may be a polypropylene film, and the polyester film may be a polyethylene terephthalate film.

  In the present invention, the thickness of the biaxially stretched film is not particularly limited, but may be appropriately selected within a range not impairing heat resistance, rigidity, mechanical suitability, appearance, etc., and may be, for example, 15 to 50 μm. If it is within the above range, sufficient mechanical strength can be secured when used in a container, and the welding strength is excellent with a carbon dioxide laser beam or the like. In addition, the thickness of a biaxially stretched film is a film thickness before heat shrink.

  Note that various additives such as lubricants, fillers, heat stabilizers, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, and colorants may be added to the biaxially stretched film as necessary. Good. The surface of the biaxially stretched film may be subjected to conventional surface treatment such as corona discharge treatment, plasma treatment, flame treatment, acid treatment, etc., in order to improve the printability.

Hereinafter, the present invention will be described in more detail with reference to examples.
<Perforation evaluation method>
A perforation evaluation test was performed on the base film used in Examples 1 to 4 and Comparative Examples 1 and 2 according to the following procedure. That is, after the base films of Examples 1 to 4 and Comparative Examples 1 and 2 were shrink-mounted on a bottle, they were stored at room temperature for 1 day or longer and evaluated from the perforation part (n = 5). The evaluation criteria are as follows. The obtained evaluation results are shown in Table 1.
(Evaluation) Good: When the lower end of the label is reached by one guide without losing the guide.
Possible: When the guide is less than half the circumference of the bottle and reaches the bottom of the label with a single guide.
Impossible: When the bottom of the label is not reached in one time. Or when the guide is out of half a round of the bottle.
Hereinafter, methods for producing bottles with roll shrink labels of Examples 1 to 4 and Comparative Examples 1 and 2 will be described.

<Example 1>
After perforating the biaxially stretched polypropylene film (heat shrinkage rate in the flow direction at 100 ° C is 10%, heat shrinkage rate in the width direction is 15%), cutting, and then bonding the shrink label starting edge to the bottle with hot melt Then, the shrink label was wound around the bottle body, and the end of the shrink label was bonded to the start end of the shrink label with an ultraviolet curable hot melt. The perforation size was 0.4 mm (separation interval 1.6 mm).

  The obtained bottle with a roll shrink label was irradiated with ultraviolet rays using an ultraviolet tunnel (ultraviolet irradiation device) and cured. Subsequently, it passed through a steam type shrink tunnel (heat shrinkage device) at 85 to 95 ° C., and the roll shrink label was brought into close contact with the bottle to produce a bottle with a roll shrink label. The obtained bottle with a roll shrink label had no label detachment even at the time of heat shrinkage, and softening or melting of the hot melt or ultraviolet curable hot melt was not observed, and the appearance was good. When the roll shrink label of this bottle was peeled off from the perforation, all reached the lower end of the label with one guide.

<Example 2>
Roll shrink in the same procedure as in Example 1 except that a biaxially stretched polystyrene film was used instead of the biaxially stretched polypropylene film, and the perforation size was 0.7 mm (perforation interval 1.4 mm). A labeled bottle was produced. The obtained bottle with a roll shrink label had no label detachment even at the time of heat shrinkage, and softening or melting of the hot melt or ultraviolet curable hot melt was not observed, and the appearance was good. When the shrink label of this bottle was peeled from the perforation, all reached the lower end of the label with one hand.

<Example 3>
Roll in the same procedure as in Example 1 except that a biaxially stretched polyethylene terephthalate film was used instead of the biaxially stretched polypropylene film and that the perforation size was 1.0 mm (perforation interval 1.0 mm). A bottle with a shrink label was produced. The obtained bottle with a roll shrink label had no label detachment even at the time of heat shrinkage, and softening or melting of the hot melt or ultraviolet curable hot melt was not observed, and the appearance was good. As for the adhesive strength, the shear strength between the label and the label is 4.6 N / 15 mm, the shear strength between the bottle and the label is 4.3 N / 15 mm, the peel strength between the label and the label is 2.5 N / 15 mm, The peel strength between the labels was 2.2 N / 15 mm. When the shrink label of this bottle was peeled from the perforation, all reached the lower end of the label with one hand.

  The shear strength was cut into a test piece having a length of 70 mm and a width of 15 mm, and measured at 300 mm / min according to JIS K6850 using a tensile tester (Orientec Co., Ltd.). N / 15 mm). For the peel strength, a test piece was cut into a length of 50 mm and a width of 15 mm, and the end was peeled off to prepare a pinch. This was measured at 300 mm / min by 180 degree peeling according to JIS K6854 using a tensile tester.

<Example 4>
The biaxially stretched polyethylene terephthalate film was perforated, cut, and then welded by irradiating carbon dioxide laser light on the overlapping portion of the shrink label instead of bonding with hot melt or ultraviolet curable hot melt. The irradiation conditions were an output of 250 W, 100 Hz, a wavelength of 10.6 μm, a pulse interval of 500 μs, a pulse width of 70 μs, and a processing speed of 12 m / min. This formed into the roll shrink label. The perforation size was 1.0 mm (perforation interval 1.0 mm).

  The obtained roll shrink label was attached from the upper part of the bottle, passed through a steam type shrink tunnel at 85 to 95 ° C., and the roll shrink label was brought into close contact with the bottle to produce a bottle with a roll shrink label. The obtained bottle with a roll shrink label did not peel off the label even during heat shrinkage, and the appearance was good. The adhesive strength was a shear strength of 21 N / 15 mm and a peel strength of 5.1 N / 15 mm. When the roll shrink label of this bottle was peeled off from the perforation, all reached the lower end of the label with one guide.

<Comparative Example 1>
In place of the biaxially stretched polypropylene film, a bottle with a roll shrink label was prepared in the same procedure as in Example 1 except that a uniaxially stretched polypropylene film in the flow direction (heat shrinkage in the flow direction at 100 ° C. was 50%) was used. Manufactured. When the roll-shrink label of the obtained bottle was peeled off from the perforation, it did not reach the lower end of the label in one hand, and the shrink label was torn in the body winding direction and was difficult to peel off.

<Comparative example 2>
In place of the biaxially stretched polypropylene film, a roll-shrink labeled bottle was prepared in the same procedure as in Example 1 except that a flow direction uniaxially stretched polypropylene film (heat shrinkage rate in the flow direction at 100 ° C. was 15%) was used. Manufactured. When the roll-shrink label of the obtained bottle was peeled off from the perforation, it did not reach the lower end of the label in one hand, and the shrink label was torn in the body winding direction and was difficult to peel off.

  From the results of Examples 1 to 4 and Comparative Examples 1 and 2 shown in Table 1 below, the roll shrink label of the present invention can be peeled without tearing in the body winding direction when peeling the label from the perforation. Recognize.

※１：二軸延伸ポリプロピレン
※２：二軸延伸ポリスチレン
※３：ポリエチレンテレフタレート

* 1: Biaxially stretched polypropylene * 2: Biaxially stretched polystyrene * 3: Polyethylene terephthalate

DESCRIPTION OF SYMBOLS 1 Original fabric roll 2 Biaxially stretched film 3 Shrink label 4 Perforation 5 Start end part 6 End part 7 Adhesive 8 Container 9 Cylinder 10 Stack part 11 Roll shrink label

Claims (12)

In the roll shrink label that is wound around the outer peripheral surface of the container body,
A roll shrink label comprising a biaxially stretched film and provided with perforations in a direction perpendicular to the body winding direction.   The roll shrink label according to claim 1, wherein the biaxially stretched film has a thermal shrinkage rate of 10% or more at 100 ° C in the body winding direction.   Hot melt or UV curable hot melt is applied to the adhesive portion between the shrink label and the container, and UV curable hot melt is applied to the adhesive portion between the start and end portions of the shrink label. The roll shrink label according to claim 1 or 2.   The roll shrink label according to claim 1 or 2, wherein the shrink label start and end portions are welded by a carbon dioxide laser.   The biaxially stretched film is one selected from the group consisting of a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, and a laminate film of two or more of these films. The roll shrink label as described in any one of these.   The roll shrink label according to any one of claims 1 to 5, wherein a heat shrinkage rate at 100 ° C in a direction orthogonal to a body winding direction of the biaxially stretched film is 0 to 15%. A transporting process for transporting the roll shrink label original, a cutting process for manufacturing the shrink label by cutting the roll shrink label original into a predetermined length, and a mounting process for mounting the roll shrink label on the container. In the method of manufacturing a container with a roll shrink label,
The roll shrink label original fabric is a biaxially stretched film, and a die cut roll or laser irradiation having a perforated cutting edge simultaneously with, immediately before, or offline with the cutting of the biaxially stretched film in the cutting step. The manufacturing method of the container with a roll shrink label characterized by providing a perforation in the width direction.   The mounting step includes applying an hot melt or an ultraviolet curable hot melt to the start end of the shrink label, and applying an ultraviolet curable hot melt to the end of the shrink label; and the start end And bonding the container, winding the shrink label around the container, bonding the starting end and the terminal end to form a roll shrink label, and applying ultraviolet rays to the container to which the roll shrink label is bonded The manufacturing method of the container with a roll shrink label of Claim 7 which has a heat shrink process which heat-shrinks the container which mounted | worn the roll shrink label, and the ultraviolet irradiation process which irradiates, and hardens an adhesive agent.   The mounting step includes forming both ends of the shrink label cut into a cylindrical shape, and welding the overlap portion with carbon dioxide laser light to form a roll shrink label, and an upper side or a lower portion of the roll shrink label. The roll shrink label according to claim 7, further comprising: an inserting step of inserting the container from the side and mounting the roll shrink label on the container; and a heat shrinking step of heat shrinking the container on which the roll shrink label is mounted. A manufacturing method of a container with attached.   The manufacturing method of the container with a roll shrink label as described in any one of Claims 7-9 whose heat-shrink rate in 100 degreeC of the trunk winding direction of the said biaxially stretched film is 10% or more.   The biaxially stretched film is one selected from the group consisting of a polyolefin film, a polyester film, a polystyrene film, a polylactic acid film, and a laminate film of two or more of these films. The manufacturing method of the film with a roll shrink label as described in any one of these.   The method for producing a film with a roll shrink label according to any one of claims 7 to 11, wherein a heat shrinkage rate at 100 ° C in a direction orthogonal to a body winding direction of the biaxially stretched film is 0 to 15%.

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