JP5279132B2 - Cylindrical label with thermal insulation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating cylindrical label capable of sufficiently ensuring the heat insulation by a fibrous sheet layer, and reliably reading a read symbol by a machine. <P>SOLUTION: A fibrous sheet layer 15 capable of seeing a read symbol 2 therethrough is layered on a film layer 11 on a surface side of the film layer 11 of a part having the read symbol 2 with respect to the resin film layer 11 having the read symbol 2 provided to be read by a machine, and a smooth surface layer 16 of seeing therethrough the read symbol 2 having a surface of the arithmetic average roughness (Ra) to be defined by JIS B-0601 which is smaller than 7 &mu;m is layered on the fibrous sheet layer 15. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cylindrical label attached to the body of a container such as a beverage can or a PET bottle, and in particular, a fibrous sheet such as a nonwoven fabric is laminated on a resin film such as a heat-shrinkable film. The present invention relates to a cylindrical label having a heat insulating property, which is made of a laminated sheet and provided with a reading symbol such as a barcode read by a machine.

  For beverage products containing containers filled with beverages such as coffee and tea in containers such as metal cans and PET bottles, they are attached to the body of the container in order to sell them in a heated or cold state. It has been proposed to provide heat insulation to a cylindrical label, for example, from a laminated sheet (laminated film) in which a nonwoven fabric or Japanese paper is laminated on the surface side of a heat-shrinkable film on which a design printing layer is formed. Such a cylindrical label is conventionally known from Patent Document 1 below.

JP 2007-44982 A

  By the way, in beverage products in containers containing coffee / tea, etc., a reading symbol such as a barcode read by a machine is generally widely used to manage the product, but it has a heat insulating property. In the case of a cylindrical label made of a laminated sheet in which a fibrous sheet such as a nonwoven fabric is laminated on the surface side, the surface of the fibrous sheet layer has many irregularities and is difficult to perform high-precision printing. Even if a reading symbol is printed on the surface of the sheet layer, there is a possibility that reading by a machine cannot be surely performed.

  On the other hand, even when a reading symbol is printed on a resin film (heat-shrinkable film) that becomes the substrate of the laminated sheet, if the surface side of the film layer is covered with the fibrous sheet layer at the portion of the reading symbol, even if the reading symbol is printed Even if the fibrous sheet layer at the portion of the symbol has transparency and the reading symbol below it can be seen through the fibrous sheet layer, the laser beam from the reading machine is irradiated on the reading symbol. When the scanning symbol is read by the reflected light, the laser light is irregularly reflected by the irregularities on the surface of the fibrous sheet layer, so that there is a possibility that the reading by the machine cannot be surely performed.

  On the other hand, in the above-mentioned Patent Document 1, in a laminated sheet (laminated film) for forming a cylindrical label, a fibrous sheet (second film) laminated on a resin film (first film). ) Is a portion where the ends of both sides of the laminated sheet (laminated film) are overlapped and bonded, and the fibrous sheet (second film) of the portion corresponding to the overlap margin on one side is excluded. On the other hand, the width of the non-laminated range of the fibrous sheet (second film) can be printed such as a mechanical reading symbol such as a bar code, a content display with fine characters, and an explanatory note. It is described that it may be formed to the extent. However, when the non-laminated range of the fibrous sheets is set so wide, there is a problem that the heat insulating effect by the fibrous sheets is impaired.

  The present invention is intended to solve the above problems, specifically, for a cylindrical label with heat insulation, it is possible to sufficiently ensure the heat insulation by the fibrous sheet layer, And it makes it the subject to make it possible to read a reading symbol reliably with a machine.

  In order to solve the above problems, the present invention rolls a laminated sheet in which a fibrous sheet is laminated on a resin film so that the fibrous sheet layer is on the surface side, The surface of the film layer where the reading symbol is provided, compared to the resin film layer provided with the reading symbol that can be read by a machine, in the cylindrical label formed by adhering the overlapped ends. On the side, a fibrous sheet layer through which the reading symbol can be seen is laminated on the film layer, and the reading symbol can be seen through on the fibrous sheet layer, and is defined in JIS B-0601. A smooth surface layer having a surface with an arithmetic average roughness (Ra) smaller than 7 μm is laminated.

  According to the cylindrical label provided with the heat insulating property of the present invention as described above, it is possible to sufficiently ensure the heat insulating property by the fibrous sheet layer by providing the fibrous sheet layer on the entire surface (outer surface) of the cylindrical label. In such a case, the portion provided with the reading symbol is also completely covered with the fibrous sheet layer, but even if the reading symbol is covered with the fibrous sheet layer, the reading symbol is read by the machine. When reading, the reading symbol can be seen through the fibrous sheet layer and the surface smooth layer, and the laser beam from the reading machine is not irregularly reflected on the surface of the surface smooth layer, so that the reading symbol is surely confirmed. Can be read.

It is a perspective view which shows one Example of the cylindrical label provided with the heat insulation of this invention. FIG. 2 is a perspective explanatory view schematically showing the vicinity of both ends of a laminated sheet as a material for the cylindrical label shown in FIG. 1. FIG. 3 is an explanatory cross-sectional view schematically showing a cross-sectional structure of a portion provided with a reading symbol of the laminated sheet shown in FIG. 2.

  With regard to the cylindrical label with heat insulation, the following embodiment is implemented as the best mode with the object of ensuring sufficient heat insulation by the fiber sheet layer and ensuring that the reading symbols can be read by a machine. As specifically shown in the example, a laminated sheet in which a fibrous sheet is laminated on a resin film is rounded into a cylindrical shape so that the fibrous sheet layer is on the surface side, and the overlapped both ends In the cylindrical label formed by adhering to the surface of the film layer where the reading symbol is provided, on the surface side of the film layer where the reading symbol is provided, In addition, a fibrous sheet layer through which a reading symbol can be seen is laminated, and an arithmetic average roughness (see FIG. 6) that can be seen through the reading symbol and defined by JIS B-0601. a) is laminated surface smooth layer having a smaller surface than 7 [mu] m, it was realized by that.

  The cylindrical label having heat insulation according to the present invention is obtained by rolling a laminated sheet obtained by laminating a fibrous sheet on a resin film into a cylindrical shape so that the fibrous sheet layer is on the surface side, and overlapping the laminated sheet. It is formed by adhering the two end portions together (bag-making seal), and is attached to the trunk portion of a container in which a beverage or the like is stored in order to give decoration or heat insulation. Is.

  As the resin film used as the substrate of the laminated sheet, not only heat-shrinkable films but also stretch films and stretch shrink labels can be used. For example, polyester resins such as polyethylene terephthalate, olefins such as polyethylene and polypropylene, etc. A heat-shrinkable film made of a thermoplastic resin such as a styrene resin such as a styrene resin, a styrene-butadiene copolymer, a cyclic olefin resin, or a vinyl chloride resin can be suitably used.

  As the fibrous sheet laminated on the resin film, a nonwoven fabric, Japanese paper or the like can be suitably used. As the nonwoven fabric, for example, an appropriate fiber such as polyester, polypropylene, polyethylene, rayon, nylon, and cupra is used as a raw material, and is manufactured into a sheet shape by an appropriate method such as an adhesion method, a needle punch method, a spun bond method, or a melt blow method. There are non-woven fabrics and Japanese paper-like non-woven fabrics made from pulp fibers by a paper-making method. Moreover, as Japanese paper, there are Unryu paper, Tatsumi paper, Mizuna paper, etc., and Unryu paper can be particularly preferably used.

  As a fiber used as the material of the nonwoven fabric, there are solid fibers, hollow fibers, or mixed fibers thereof. From the viewpoint of heat insulation, it is preferable to use hollow fibers or mixed fibers containing hollow fibers. . The fiber length is preferably a long fiber from the viewpoint of the strength formed by the entanglement of the fibers and the handleability of the sheet, and is preferably a short fiber from the viewpoint of sheet cutting suitability.

  In addition, in the case of non-woven fabric made of fibers of difficult-to-adhere materials such as polypropylene, polyethylene, polyethylene terephthalate, etc., corona discharge treatment, primer treatment, etc. It is preferable to carry out an activation treatment for improving the adhesion with the agent in advance.

  The fiber sheet made of non-woven fabric or Japanese paper may be printed on the surface (outer surface) as necessary, for example, after laminating the fiber sheet on a resin film. You may make it form an outer surface printing layer by carrying out relief printing of the predetermined designs, such as a brand name and a pattern, on the surface of the fibrous sheet layer of a sheet | seat. Furthermore, in order to prevent fiber fraying due to flaking or rubbing of the fibrous sheet, the surface (outer surface) of the fibrous sheet layer that has been subjected to external printing is not damaged to the extent that the tactile sensation and aesthetics of the fibrous sheet are impaired. A protective layer may be formed by applying a transparent medium ink.

  As an adhesive layer provided on the surface (outer surface side) of a resin film for laminating a fibrous sheet, an adhesive used in a normal dry laminating method or a wet laminating method can be used, for example, Acrylic, polyurethane, vinyl acetate, vinyl chloride, rubber, or other solvent-based adhesives or water-soluble adhesives can be suitably used.

  An embodiment of the cylindrical label having the heat insulating property of the present invention comprising a laminated sheet in which a film layer and a fibrous sheet layer are laminated via such an adhesive layer will be described below.

  In the present embodiment, as shown in FIG. 2, the laminated structure of the laminated sheet that is the material of the cylindrical label is on the back surface (the surface that is the inner surface of the cylindrical label) of the film layer 11 that is the substrate of the laminated sheet 10. The base print layer 12 is formed in a state where only the adhesive layer 13 is provided on one end side. In addition, a fibrous sheet layer 15 is formed on the surface of the film layer 11 (the surface that is the outer surface of the cylindrical label) via an adhesive layer 14.

  The film layer 11 serving as the substrate of the laminated sheet 10 is not particularly limited, but in this example, it is made of a thermoplastic longitudinal uniaxial shrink type colorless transparent or colored transparent heat shrinkable film at 90 ° C. The heat shrinkage rate due to heating is set in the range of 5 to 80% (preferably 10 to 75%) in the mechanical flow direction (MD direction), and 10 in the direction orthogonal to the mechanical flow direction (TD direction). % Or less (preferably 3% or less). When the laminated sheet 10 having the film layer 11 made of such a heat-shrinkable film is formed into a cylindrical label, the MD direction of the heat-shrinkable film that is the shrinking direction of the film layer 11 is the circumferential direction of the tubular label ( Horizontal direction), and the TD direction is the height direction (vertical direction) of the cylindrical label.

  The base print layer 12 formed on the back surface of the film layer 11 is formed by printing a pattern as a lining, a reading symbol such as a barcode read by a machine, by gravure printing or the like, As the printing ink, polyether / polyurethane ink, alcohol-soluble acrylic ink, or the like can be used.

  In the present embodiment, on the back side of the film layer 11, on the one end side of the laminated sheet, an adhesive layer 13 that can be welded and sealed is provided without providing the base print layer 12. By laminating and sealing the side end portions of the laminated sheet rolled into a cylindrical shape, the laminated sheet is formed on the cylindrical label. As a welding seal method, an appropriate method such as heat sealing, impulse sealing, laser sealing, ultrasonic sealing, or the like is possible.

  For the adhesive layer 13 on the back side of the film layer 11, both ends of the laminated sheet 10 are overlapped using an adhesive having adhesiveness to both the material of the film layer 11 and the fibrous sheet layer 15. When the base print layer 12 is printed, it is formed by applying an adhesive to the back surface on one end side of the laminated sheet 10 positioned above the overlapped portion. The adhesive layer may be formed by applying an adhesive to the back surface of the film layer 11 at the same time as the base print layer 12. In such a case, the adhesive application process can be simplified.

In this embodiment, the fibrous sheet layer 15 laminated on the surface side of the film layer 11 via the adhesive layer 14 is substantially the same size as the film layer 11 serving as a substrate, and approaches the shrinkage performance of the film layer 11. Accordingly, it is possible to contract, and it is possible to see through the symbols printed on the base print layer 12 and barcodes. That is, the fibrous sheet layer 15 allows the printed content of the base print layer 12 to be seen through while ensuring the fibrous texture and heat insulation, and specifically, the basis weight of the fibrous sheet layer 15. Is set in the range of 3 to ²⁰ g / m ² (preferably 5 to 15 g / m ² ).

  By the way, the laminated sheet 10 in which the respective layers as described above are laminated, the film layer 11 is the inside and the fibrous sheet layer 15 is the outside, and the shrinking direction of the laminated sheet 10 (the shrinkage of the heat-shrinkable film of the film layer 11). Direction) is bent into a cylindrical shape so as to be the circumferential direction of the cylindrical label, and the adhesive layer 13 formed on the opposite ends of each side, that is, on the back surface on one end side of the laminated sheet 10, The base print layer 12, from the inner side to the outer side of the tube, by overlapping the surface of the fibrous sheet layer 15 on the other end side with a required width dimension and adhering with a welding seal (bag-making seal), The cylindrical label of the present Example laminated | stacked in order of the film layer 11, the adhesive bond layer 14, and the fibrous sheet layer 15 is formed.

  As shown in FIG. 1, the cylindrical label of this embodiment has a reading symbol such as a barcode read by a machine in the vicinity of the joint between the sheet end portions at the bottom of the cylindrical label 1. 2 is provided. This reading symbol 2 is printed as one of the printed contents of the base print layer 12 on the back side of the film layer 11 and is therefore covered by the fibrous sheet layer 15 laminated on the front side of the film layer 11. However, since the fibrous sheet layer 15 can see through the printed content of the base printed layer 12, when the cylindrical label is viewed from the surface side, the fibrous sheet layer 15 is Throughout, the reading symbol 2 is visible.

  However, since the fibrous sheet layer 15 has irregular irregularities due to fibers on the surface thereof, even if the reading symbol 2 can be seen through the fibrous sheet layer 15, the reading symbol 2 is read by a machine. When trying to do so, the laser beam from the machine is irradiated on the reading symbol 2 and scanned, and when the reading symbol 2 is read by the reflected light, the laser beam is irregularly reflected by the irregularities on the surface of the fibrous sheet layer 15. Therefore, there is a possibility that reading cannot be performed.

  On the other hand, in this embodiment, as shown in FIG. 3, a part of the surface of the fibrous sheet layer 15 corresponding to the part of the reading symbol 2 provided on the back side of the film layer 11 (in other words, the film layer The surface smoothing layer 16 is provided so as to cover the surface of the fibrous sheet layer 15 at the portion of the fibrous sheet layer 15 bonded to the adhesive 11 via the reading symbol 2 and the film layer 11. Yes.

  The surface smooth layer 16 is colorless and transparent or colored and transparent so that the reading symbol 2 can be seen through, and has a smooth surface from which the reading symbol 2 can be read. That is, in the portion of the reading symbol 2, the surface smoothing layer 16 is provided so as to cover the surface of the fibrous sheet layer 15 (irregular irregularities caused by the fibers) covering the surface, and the surface of the surface smoothing layer 16 is The surface is smooth so that the laser beam is difficult to diffusely reflect.

  Specifically, in this example, the total light transmittance at the location where the surface smoothing layer 16 was formed was 80% or more (turbidimeter based on JIS K-7137 [manufactured by Nippon Denshoku Industries Co., Ltd. NDH-2000] is used. Further, the smoothness of the surface of the surface smooth layer 16 is set so that the arithmetic average roughness (Ra) defined by JIS B-0601 on the surface of the surface smooth layer 16 is in the range of 1 to 7 μm. Yes.

  In addition, about the reason which has set arithmetic mean roughness (Ra) prescribed | regulated by JIS B-0601 in the surface of the surface smooth layer 16 in the range of 1-7 micrometers, arithmetic mean roughness (Ra) is from 7 micrometers. If it is large, there is a possibility that the reading symbol cannot be reliably read due to irregular reflection of the laser beam. On the other hand, if the arithmetic average roughness (Ra) is to be made smaller than 1 μm, it is produced to form an excessively smooth layer. This is because the cost may increase.

  The surface smooth layer 16 is coated with a thermoplastic resin mainly composed of a polyester resin such as polyethylene terephthalate, an olefin resin such as polyethylene or polypropylene, a styrene resin, a polyurethane resin, an acrylic resin, and a polyamide resin. A coating liquid formed by mixing and dissolving the above resin material with an organic solvent is directly applied onto the fibrous sheet layer, and the solvent is removed from the coating liquid layer. The surface smoothing layer 16 is formed by evaporating and removing, so that the resin is made into a liquid state and then applied onto the fiber sheet layer 15 to allow the resin to enter the fiber gaps. The irregularities on the surface of the fibrous sheet layer 15 are filled with the coating layer without any gaps.

  The type of solvent that dissolves the resin material is not particularly limited. For example, alcohol solvents, ester solvents such as methyl ethyl ketone, aromatic hydrocarbons such as toluene and xylene, fats such as hexane and octane, etc. A group hydrocarbon or the like can be preferably used alone or in combination.

About the cylindrical label 1 of the present Example as described above, as a specific example of the laminated sheet 10 as the material, it is made of a heat-shrinkable polyethylene terephthalate resin having a thickness of 18 μm and a barcode 2 provided on the back surface by gravure printing. On the surface of the film layer 11, Yuryu Paper # 1 manufactured by Marubayashi Paper Co., Ltd. having a basis weight of 9 g / m ² as a fibrous sheet layer 15 through an adhesive layer 14 made of urethane adhesive having a coating amount of 2 g / m ^2. -1 and a part of the surface of the fibrous sheet layer 15 corresponding to the barcode 2 printed on the back side of the film layer 11, 30 g of a polyester resin solution (Daitron 0B05) manufactured by Daito Paint Co., Ltd. and a solvent ( die Tron thinner # 903 [25% toluene, MEK75%]) of 40g and a coating liquid blended with 1.3 g / ^{m 2} applied to be evaporated off the solvent It is the arithmetic mean roughness defined by JIS B-0601 (Ra) of the surface to produce a laminated sheet 10 surface smoothness layer 16 is formed is 6.8 [mu] m. And, as a result of reading the barcode 2 through the fibrous sheet layer 15 from above the surface smooth layer 16 with a barcode reader, it could be read without any problem.

  According to the cylindrical label 1 of the present embodiment formed of the laminated sheet 10 as described above, a reading machine (barcode reader or the like) reads a reading symbol (barcode or the like) 2 to irradiate a laser beam from the reading machine. When the reading symbol 2 is read by scanning the reading symbol 2 through the surface smoothing layer 16 and the fibrous sheet layer 15 and reading the reflected light with a photoelectric element or the like, the reading symbol 2 is provided. Since the surface smoothing layer 16 having a smooth surface is formed on a part of the surface of the fibrous sheet layer 15 corresponding to the above-mentioned part, the laser beam irradiated from the reading machine is irradiated with the surface of the cylindrical label 1 (surface Since the light is not irregularly reflected on the surface of the smooth layer 16, the reading symbol 2 can be reliably read.

  Moreover, since the fibrous sheet layer 15 is laminated on the entire surface side of the film layer 11, heat insulation and texture by the fibrous sheet layer 15 can be secured even in the portion where the reading symbol 2 is provided, The heat insulation and texture of the fiber sheet layer 15 can be ensured for the entire label, and it is not necessary to carry out molding to partially remove the fiber sheet layer 15 in order to read the reading symbol 2, so that a laminated sheet Productivity can be improved.

  As mentioned above, although one Example of the cylindrical label provided with the heat insulation of this invention was described, this invention is not limited only to the specific structure shown in said Example, For example, it is made from resin In the above embodiment, the reading symbol provided on the film layer is printed on the base printed layer on the back side of the film layer, but it is printed on the front side of the film layer or is not a direct print but a separate body. It is also possible to affix a printed symbol on the sheet. Further, in the above embodiment, nothing is provided on the surface of the fibrous sheet layer other than the portion provided with the surface smoothing layer, but the outer surface printing is performed on the surface of the fibrous sheet layer other than the portion provided with the surface smoothing layer. A layer or a protective layer may be formed. In this case, the outer printed layer or protective layer is formed on the surface of the fibrous sheet layer corresponding to the part of the fibrous sheet layer corresponding to the part of the reading symbol. Needless to say, it is possible to change the design as appropriate, such as not to form a layer.

DESCRIPTION OF SYMBOLS 1 Cylindrical label 2 Reading symbol 10 Laminated sheet 11 Film layer 12 Base printing layer 13 Adhesive layer 14 Adhesive layer 15 Fibrous sheet layer 16 Surface smooth layer

Claims (3)

  A cylinder formed by rolling a laminated sheet in which a fibrous sheet is laminated on a resin film into a cylindrical shape so that the fibrous sheet layer is on the surface side, and bonding the overlapped ends. On the surface side of the film layer where the reading symbol is provided, the reading symbol can be seen through the film layer with respect to the resin film layer provided with the reading symbol read by the machine. A surface on which a fibrous sheet layer is laminated, a reading symbol can be seen through on the fibrous sheet layer, and an arithmetic average roughness (Ra) defined by JIS B-0601 is smaller than 7 μm. A cylindrical label, characterized in that a smooth surface layer is laminated.   The cylindrical label according to claim 1, wherein the arithmetic average roughness (Ra) on the surface of the surface smooth layer is in the range of 1 to 7 µm.   The cylindrical label according to claim 1 or 2, wherein a fibrous sheet layer is laminated on the entire surface side of the resin film layer.

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