JP5157145B2 - Wound label, container with roll label, and manufacturing method thereof - Google Patents

Description

  The present invention relates to a wound label that is directly attached to the outer peripheral surface of a container body, and more specifically, a wound label that can be directly attached to the outer peripheral surface of a container body by laser irradiation, the container with the wound label, and a method for manufacturing the same. About.

  2. Description of the Related Art Conventionally, as a method of attaching a wound label over a whole circumference to a container such as a beverage, there is a method of externally attaching and attaching a label adhered in a cylindrical shape to the container (Patent Document 1). The label used in Patent Document 1 is a label formed in a cylindrical shape by superimposing both ends of a printed synthetic resin film and bonding them by laser light irradiation. A surface layer laminated on both sides of the material, the surface layer is made of a material having a melting point lower than that of the base material, and the adhesive surfaces of the both end portions are formed in a non-printed portion where printing is not performed. It is what has been.

  In addition, after the cylindrical label is externally fitted around the outer periphery of the container, heat treatment is performed to form a shrink, and a cylindrical shrink label that covers the surface continuously from the bottom of the mouth of the container to the bottom is externally fitted, and then heat shrink treatment There is a technique for performing (Patent Document 2). In Patent Document 2, a hot-melt adhesive is applied in advance to both ends of the shrink label, and the label is attached in a cylindrical shape via the hot-melt adhesive.

  On the other hand, instead of the method of fitting the cylindrical label to the container, the wound label is bonded to the container end via an adhesive, and the other end of the wound label is wound to the container via an adhesive. There is also a technique for fixing to a container (Patent Document 3). Simply attach the adhesive to the back side of the label, attach it to the peripheral surface of the container in order from the start end side of the label, and stack the end of the label on the start end, making it difficult to peel off the label after use, Also, if an adhesive with weak adhesive strength is used to enhance the peelability of the label, the overlapping part of the label may be inadvertently peeled off during the product distribution process, etc. In the method of using a label, the cylindrical label is made in view of problems such as high cost, and the label described in Patent Document 3 forms a hardly adhesive layer on the back surface of the label and adheres to the hardly adhesive layer. This is a label that attaches both ends of the label in a state where the container adhesive layer is laminated and formed, and the container adhesive layer is adhered to the peripheral surface of the container and the label back surface is temporarily adhered. Can be removed, It is intended to refer.

Moreover, the apparatus which sticks such a winding label to a container is also disclosed (patent document 4). The device described in Patent Document 4 is for attaching a wound label to a container through a heat-sensitive adhesive, pulling out a raw roll label having a hot-melt adhesive layer on the back surface, and cutting it into a predetermined size. It is an apparatus that manufactures a label, heats the label before sticking, imparts adhesiveness to the back of the label, and sticks the label continuously to the peripheral surface of the container. In the device described in Patent Document 4, a negative pressure suction type transfer drum is rotatably disposed in the vicinity of the label cutting device, the back side of the label cut by this transfer drum is sucked and transferred to the sticking drum, The back surface of the label is heated by a heating device while adsorbing the front surface side of the label with the sticking drum, and then the back surface of the label is stuck to the container transported in the tangential direction of the sticking drum by the transport device.
JP 2000-141469 A JP 2006-117269 A JP 2000-242179 A JP-A-9-301333

  However, a container formed by fitting a cylindrical label on the container intermittently performs the process of covering the label material, so that the operation rate decreases, or when the label material is covered, a shift occurs and the container is placed in a suitable location. The label may not be displayed correctly.

  On the other hand, it is convenient if the wound label can be directly attached to the container without forming a cylindrical label in advance. However, the adhesive method using cold glue adhesive such as casein glue or sticky label is a method of sticking to glass bottles such as beer bottles, and the adhesive sticks out and floats easily. To do. In addition, there is a method using an adhesive label, but the cost increases due to the use of release paper. In the method of bonding a container and a wound label with a hot-melt adhesive, when the container is in a high temperature condition after bonding, the hot-melt adhesive may melt and impair the appearance. In particular, when the contents of the container are heated products, the hot melt adhesive may melt during transfer or within the sales period depending on the storage temperature of the contents. In some cases, the hot-melt adhesive may melt out. In addition, when a reactive hot melt adhesive is used, it has heat resistance after curing, but the productivity is lowered due to the long reaction time.

  In view of such a current situation, an object of the present invention is to provide a wound label capable of directly attaching a wound label to a container without an adhesive.

  Furthermore, an object of the present invention is to provide a method for producing a wound label or a container with a wound label quickly and easily with a simple process.

  The present inventor has studied in detail the wound label that is directly attached to the outer peripheral surface of the body of the container. As a result, if the adhesive can be adhered to the container by laser welding, the wound label can be attached to the container without any adhesive. If it has a welded layer, it can be attached to the container by laser irradiation. According to laser welding, it can be attached to the container without using a heating device, unlike hot melt adhesives. In addition, it is possible to further improve the laser absorption efficiency by containing a laser absorber or laminating a laser absorber layer, and at the same time, to stabilize the surface layer of the wound label at the time of adhesion, and the laser absorber In addition to the layer, if a laser reflective layer is provided on the innermost layer of the wound label, the laser can be efficiently used even if the irradiation dose is reduced Adhesive that is possible that, when using such a winding label, found that a stable label bonding strength can be produced production efficiency winding labeled containers at high speed, and completed the present invention.

  That is, the present invention provides a wound label that is directly affixed to the outer peripheral surface of a body portion of a container, and is affixed to the container by laser welding.

  In addition, the present invention provides a wound label that is affixed directly to the outer peripheral surface of the body portion of the container and includes a base film layer and a laser welding layer.

  Moreover, the said winding label provides the container with a winding label affixed on the container by laser welding.

  Furthermore, the present invention is a method for producing a wound label that is directly affixed to the outer peripheral surface of the body part of a container, including a base film layer and a laser weld layer, on the base film layer or the laser weld layer The present invention provides a method for producing a wound label, characterized in that a laser absorbent layer is formed by printing with a carbon-containing ink.

  Further, in the present invention, the wound label and the container are overlapped, the laser is irradiated from the surface side of the wound label to fix the label and the container, and the remaining part of the wound label is wound around the outer periphery of the container A method of manufacturing a container with a wound label is provided in which the label is fixed to the container by irradiating a laser from the surface side of the label terminal portion later.

Winding label of the present invention can be directly attached to the container, since no adhesive is used, it is possible to simplify the production process, cost can be reduced.

  In addition, it is superior in printability compared to wound labels that use hot-melt adhesives, and does not use hot-melt adhesives in the storage and distribution of wound label products. It can be stored and distributed.

Winding label of the present invention, it is possible to improve adhesion by providing a laser welding layer, and a winding label surface after bonding can be stabilized, to produce a winding labeled container excellent in appearance Can do.

  Since the wound label of the present invention can form a laser absorbent layer and a laser reflective layer by a gravure printing method or the like, for example, when forming a design print layer on a wound label, the laser absorbent layer or the laser reflective layer is simultaneously formed. A layer can be formed, and a wound label can be easily produced.

  The apparatus for manufacturing a container with a wound label according to the present invention does not require a thermal drum or the like that is necessary when using a hot-melt adhesive, so that the apparatus can be miniaturized. In addition, when using a hot melt type adhesive, it is necessary to control the temperature at the time of bonding. However, in the present invention, since a hot melt type adhesive is not used, high production stability and adhesion without temperature control. Stability can be ensured.

  Furthermore, since the wound label of the present invention has high adhesion stability, the wound label can be attached to the container at high speed, and the production efficiency can be improved.

  Hereinafter, the wound label of the present invention, the container with the wound label, the method for producing the wound label, the method for producing the container with the wound label, and the apparatus will be described.

(1) Structure of wound label The wound label of the present invention is a wound label that is directly affixed to the outer peripheral surface of the body of the container, and any material can be used as long as it can be affixed to the container by laser welding. Preferably, the wound label includes a base film layer and a laser welding layer. The laser welding layer is included in the winding part of the wound label because the laser welding layer is softened and melted by laser irradiation to quickly fix the container and the winding label sticking part without using an adhesive. Because it can.

  In the wound label of the present invention, the “laser welded layer” means a resin layer that can be welded by absorbing the energy of the laser beam upon irradiation with the laser beam. Due to the presence of the laser welding layer, the container and the wound label can be bonded by laser irradiation. The wound label of the present invention may further have a laser absorber layer and a laser reflection layer, and may further have a design printing layer and an outer layer. In addition, the wound label of this invention can be laser-welded to a container by laser irradiation from the label surface. FIG. 1 shows a preferred embodiment of the wound label of the present invention.

  FIG. 1 shows a wound label comprising a base film layer (10) and a laser weld layer (20). In this embodiment, the laser welding layer is formed over the entire width of the wound label. When the laser is irradiated from the label surface, the laser welding layer (20) absorbs the energy of the laser beam and is welded to be thermally welded to the container.

  In this invention, as shown in FIG. 2, the laser absorber layer (30) may be further included. When the laser absorbent layer (30) is formed in the innermost layer of the wound label, the laser absorbent layer (30) absorbs the laser light, so that the laser weld layer (20) can be efficiently softened. . Moreover, since the laser absorbent layer (30) is vaporized by laser irradiation, the laser welding layer (20) can be easily thermally welded to the container. In addition, you may form a laser absorber layer (30) between a base film layer (10) and a laser welding layer (20), as shown in FIG. Also in this case, the laser absorbent layer (30) can be vaporized by laser irradiation, and the laser welding layer (20) can be thermally welded to the container.

  Furthermore, in the present invention, the laser weld layer (20) may contain a laser absorber. In FIG. 4, the aspect of the winding label which consists of a base film layer (10) and a laser absorber containing laser welding layer (25) is shown. When a laser absorber is contained in the laser welding layer (20), the laser beam absorption is improved as compared with the laser welding layer (20) described above, and the laser welding is efficiently performed in the same manner as in the embodiments shown in FIGS. It can be performed.

  The wound label of the present invention may have a laser reflecting layer (40) in the innermost layer of the label. This embodiment is shown in FIG. When laser irradiation is performed from the surface of the wound label, the laser light is reflected by the laser reflecting layer (40) formed on the innermost layer of the wound label, and the laser light in the laser absorbent layer (30) and the laser absorbent-containing laser weld layer (25). Energy absorption can be improved, and laser welding can be performed efficiently even with a small amount of laser irradiation.

  The wound label of the present invention may have a design print layer (50) inside or outside the base film layer (10). Thereby, a design can be given to the wound label. In FIG. 6, the aspect which formed the design printing layer (50) between the base film layer (10) and the laser welding layer (20) is shown.

  The wound label of the present invention may further form an outer layer (60) on the outer side of the base film layer (10). This embodiment is shown in FIG. By forming such an outer layer (60), the wound label can be protected from physical damage. The outer layer (60) is not limited to a single layer, and may be a laminate of two or more layers. In the present invention, since the laser welding layer (20) is softened by laser irradiation, the outer layer (60) and the base film layer (10) can serve as a support, and therefore, the laminate can ensure such strength. preferable. Note that any one of the outer layers (60) may be the design print layer (50) described above.

  1 to 7 are embodiments in which each layer is formed over the entire width of the wound label. However, the wound label of the present invention is not limited to these, and at least a sticking portion to be laser-welded by laser irradiation is provided. What is necessary is just the said structure. Such a sticking portion may be any of a wound label, but is generally a label start end portion and a label end portion. In FIG. 8, the base film layer (10), the laser absorbent layer (30), and the laser welding layer (20) are laminated on the pasting part (w), except for the base part film layer (10), The aspect by which a design printing layer (50) and a laser welding layer (20) are laminated | stacked is shown.

  The size of the wound label of the present invention can be appropriately selected according to the size of the container to be attached. Similarly, the size of the sticking part can be appropriately selected according to, for example, the use mode of the label sticking device.

(2) Base film layer As the resin constituting the base film layer constituting the wound label, it is preferable to use a resin having mechanical, physical, chemical strength, and printability.

  For example, polylactic acid film, polystyrene film, polyester film, low density polyethylene film, medium density polyethylene film, high density polyethylene film, low density linear polyethylene film, cyclic polyolefin film, polypropylene film, ethylene-propylene copolymer Stretched polyolefin film formed from resin such as polymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, laminate of nonwoven fabric and shrink film Film, polyester-polystyrene co-extruded film, polyamide film such as 6 nylon film, 6, 6 nylon film, etc., modified poly formed from resin such as chlorinated polyethylene, chlorinated polypropylene Les fins film, vinyl chloride - is film formation of a resin-vinyl acetate copolymer film, one or more films selected from the group consisting of acrylic resin film can be used.

  One or more of the above resins are used, and the resin is formed into a single layer using a film forming method such as an extrusion method, a cast molding method, a T-die method, a cutting method, an inflation method, or the like. Or a film formed by coextrusion using two or more kinds of resins, or a film formed by mixing two or more kinds of resins, and is an unstretched film. Alternatively, various stretched films formed by stretching in a uniaxial or biaxial direction by a tenter method, a tubular method, or the like may be used.

  More preferably, stretched polyester film such as stretched polyethylene terephthalate film, stretched polystyrene film, stretched polyolefin film such as stretched polypropylene, polylactic acid film, unstretched polyolefin film, unstretched polyester such as unstretched polyethylene terephthalate film. One or more types of films selected from the group consisting of non-stretched polyolefin films, such as non-stretched polystyrene films, unstretched polypropylene films, foamed polyolefin films, foamed polystyrene films, nonwoven fabrics and shrink film laminate films Yes, it can be selected appropriately according to the application.

  In particular, when the wound label of the present invention is used as a shrink film, the film constituting the base film layer can be widely used that can be shrunk by heat treatment, for example, stretched polyethylene terephthalate film or the like. Polyester film, stretched polystyrene film, low density polyethylene film, medium density polyethylene film, high density polyethylene film, low density linear polyethylene film, stretched polyolefin film such as polypropylene film, polylactic acid film, foamed polyolefin film, It is preferably one or more kinds of films selected from the group consisting of expanded polystyrene film, laminated film of nonwoven fabric and shrink film, and stretched polyester-polystyrene coextruded film. Arbitrariness.

  Among these, a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a foamed polystyrene film, a laminate film of a nonwoven fabric and a shrink film, and a stretched polyester-polystyrene coextruded film One or more films selected from the group consisting of: The stretched film may be uniaxially stretched or biaxially stretched, and in the case of a uniaxially stretched film, it may be longitudinally uniaxially stretched or laterally uniaxially stretched. However, in the case of a shrink label in which a shrink label is previously attached to a container and then subjected to heat shrink treatment, a laterally uniaxially stretched film is suitable, whereas the wound label of the present invention is used as a shrink label. However, it is not limited to a laterally uniaxially stretched film, and any of laterally uniaxially stretched, longitudinally uniaxially stretched, and biaxially stretched films can be suitably used.

  The above-mentioned film is produced by using one or more kinds of resins constituting the film and using a film forming method such as an extrusion method, a cast molding method, a T-die method, a cutting method, an inflation method, or the like. Films are formed in layers, or multilayered by coextrusion using two or more types of resins, or formed by mixing two or more types of resins, and uniaxial by the tenter method or tubular method, etc. Or it can be prepared by stretching in the biaxial direction.

  In the present invention, a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a foamed polystyrene film, a stretched polyester-polystyrene coextruded film, and the like can be suitably used. Or a laminated film of a nonwoven fabric and the film may be used.

  On the other hand, in order for the label of the present invention to exhibit the effect as a shrink label, it is preferable that the heat shrinkage rate in the stretching direction is 5 to 85%. In addition, the heat shrinkage rate in this invention is a heat shrinkage rate by 100 degreeC hot water, Comprising: The heat shrinkage rate of an extending | stretching direction shall follow a following formula. Therefore, in the case of a longitudinally uniaxially stretched film, since the shrinking direction is the film flow direction, the thermal shrinkage rate in the flow direction is 5 to 85%, and in the case of a laterally uniaxially stretched film, the film shrinks in the film width direction. The heat shrinkage ratio in the film width direction is 5 to 85%. In the case of a biaxially stretched film, the thermal shrinkage rate is preferably within the above range with respect to any stretching method.

本発明において、基材フィルム層の厚みは特に限定されないが、耐熱性、剛性、機械適性、外観等を損なわない範囲で適宜選択され、２７〜２００μｍ、より好ましくは３０〜１６０μｍが好ましい。なお、シュリンクラベルにおいては、熱収縮前の層厚とする。

In the present invention, the thickness of the base film layer is not particularly limited, but is appropriately selected within a range not impairing heat resistance, rigidity, mechanical suitability, appearance, etc., and preferably 27 to 200 μm, more preferably 30 to 160 μm. In the shrink label, the layer thickness before heat shrinkage is used.

  Furthermore, various additives such as a lubricant, a filler, a heat stabilizer, an antioxidant, an ultraviolet absorber, an antistatic agent, a flame retardant, and a colorant are added to the base film layer as necessary. May be. Further, the surface of the base film layer may be subjected to conventional surface treatment such as corona discharge treatment, plasma treatment, flame treatment, acid treatment, etc. in order to improve printability.

  The base film layer is not limited to a single layer of the film, and may be a laminated film of two or more films. Further, a vapor deposition film of silicon oxide, aluminum oxide, aluminum, or the like is formed on these films. It may be provided. As thickness of a laminated film, what is formed in about 30-300 micrometers is preferable. In the shrink label, the layer thickness before heat shrinkage is used.

  In the present invention, a commercially available film may be used as the base film layer. As such a film, the product name “Polyphane FIT ST” of Polysack Plastic Industries Ltd., etc., has a maximum vertical shrinkage of 19% at 100 ° C. and 70 at 130 ° C. % Uniaxially stretched polystyrene film, manufactured by Eclone Mobil, Inc., trade name “Label-Lyte-Roll-On-Sink-on LR210”, longitudinal uniaxially stretched polypropylene film such as 18% maximum shrinkage in the longitudinal direction, manufactured by Nissei Kogyo Co., Ltd. Longitudinal uniaxially stretched white polypropylene film, vertically uniaxially stretched white expanded polypropylene film such as “Sanipearl” manufactured by Mitsui Chemicals Platec Co., Ltd., and longitudinally uniaxially stretched PLA film manufactured by Mitsubishi Plastics, Inc. can be suitably used. .

  In the present invention, the “shrink label” is a label that shrinks by heat treatment, but it does not matter whether heat shrinkage occurs. Therefore, it is a shrink label both before and after heat shrinkage.

(3) Laser Welding Layer The laser welding layer is a resin layer that can be welded by absorbing the energy of the laser beam by irradiation with the laser beam. It has been found that when a laser welding layer is provided, adhesion is possible with a small amount of irradiation, and the wound label surface layer at the time of adhesion can be stabilized.

  As resin which comprises a laser welding layer, there exists resin with melting | fusing point 75-360 degreeC. The melting point is measured with a differential calorimeter based on JIS K7122, and is defined as the peak temperature at the time of temperature increase.

  For example, glycol-modified polyethylene terephthalate (PETG), ethylene-vinyl acetate copolymer containing 3 to 10% by weight of vinyl acetate, ethylene-α-olefin copolymer polymerized using a metallocene catalyst, low-density polyethylene, medium Density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene- A methacrylic acid copolymer, polypropylene, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, polyolefin resin such as polyethylene or polypropylene is used for acrylic acid, methacrylic acid, male 1 comprising a resin such as acid-modified polyolefin resin modified with an unsaturated carboxylic acid such as acid, maleic anhydride, fumaric acid or itaconic acid, polyvinyl acetate resin, poly (meth) acrylic resin, polyvinyl chloride resin, etc. More than one kind of film or sheet or coating film can be used.

  As the ethylene-α / olefin copolymer polymerized using a metallocene catalyst, a commercially available product may be used. The product name “Kernel” manufactured by Mitsubishi Chemical Corporation, the product name manufactured by Mitsui Petrochemical Co., Ltd. “Evolue”, trade name “EXACT” manufactured by EXXONCHEMICAL, USA, trade name “AFFINITY”, trade name “ENGAGE”, manufactured by Dow Chemical, USA ) ", A product name" 04P51A "manufactured by Tosoh Corporation.

The metallocene catalyst used above is called a single-site catalyst because the current catalyst is called a multi-site catalyst with non-uniform active sites, while the active sites are uniform. Is. Examples of the metallocene transition metal compound include, for example, transition metals selected from group IVB [titanium (Ti), zirconium (Zr), hafnium (Hf)], cyclopentadienyl group, substituted cyclopentadienyl group, and indenyl group. , A substituted indenyl group, a tetrahydroindenyl group, a substituted tetrahydroindenyl group, a fluoronyl group or a substituted fluoronyl group having 1 to 2 bonds, or two of these groups covalently crosslinked. In addition, hydrogen atom, oxygen atom, halogen atom, alkyl group, alkoxy group, aryl group, acetylacetonate group, carbonyl group, nitrogen molecule, oxygen molecule, Lewis base, substituent containing silicon atom, unsaturated carbonization Those having a ligand such as hydrogen can be used. In addition, examples of the inorganic substance that supports the single-site catalyst include silica gel, zeolite, diatomaceous earth, and the like. Examples of the polymerization method include bulk polymerization, solution polymerization, suspension polymerization, gas phase polymerization and the like, and these polymerizations may be a batch method or a continuous method. The polymerization conditions are usually a polymerization temperature: −100 to 250 ° C., a polymerization time: 5 minutes to 10 hours, and a reaction pressure: normal pressure 300 kg / m ² .

  In addition, antioxidants, ultraviolet absorbers, antistatic agents, antiblocking agents, lubricants (fatty acid amides), flame retardants, inorganic and organic fillers, dyes, pigments, and the like are appropriately added to the laser welding layer. May be.

  In the present invention, the thickness of the laser welding layer is preferably 0.5 to 10 μm. If it is thinner than 0.5 μm, the peel strength after laser welding may not be sufficient. On the other hand, if it exceeds 10 μm, the laser welding force is hardly improved and is useless.

  In addition, although a laser welding layer may be provided in the full length of a winding label, you may provide only in the sticking part inside a base film layer.

  In the present invention, the wound label surface layer at the time of adhesion can be stabilized by providing the laser welding layer. The reason for the stabilization of the surface of the wound label is not clear, but it is considered that the laser welding layer absorbs the energy of the laser beam and prevents the excess energy from being transferred to the surface of the wound label. That is, since the wound label of the present invention is irradiated with laser light from the label surface, the label surface is most susceptible to the energy of the laser light. When a laser welding layer is provided inside the label from the base film layer, the laser welding layer absorbs the energy of the laser beam, so that the influence of the laser beam energy on the label surface can be suppressed, thereby melting the label surface. Etc. can be suppressed. In particular, the laser welding layer can be softened and melted more easily than the base film layer, thereby suppressing the softening and melting of the base film layer and the outer layer and stabilizing the surface layer.

  The laser welding layer may be a commercially available product as long as it is laser-welded. For example, a single-sided heat-sealable stretched polypropylene film such as “P3162” manufactured by Toyobo Co., Ltd. It can be used as a film having a layer and a laser welding layer.

(4) Laser absorbent layer The laser absorbent layer in the present invention is composed of an ultraviolet absorbent, an infrared absorbent, a near infrared absorbent, black carbon, a printing ink pigment, a printing ink dye, an aluminosilicate, a silica fine powder, and kaolin. It is a layer containing a laser absorber such as diatomaceous earth, epoxy resin, and fine particles of polymethyl methacrylate. Accordingly, examples include an ultraviolet absorber-containing layer, an infrared absorber-containing layer, a near-infrared absorber-containing layer, a black ink layer, a printing layer, and the like. In addition, a laser absorber can be suitably selected according to the kind of laser irradiated to a wound label.

  Therefore, the laser absorbent layer of the present invention comprises the above-mentioned ultraviolet absorbent, infrared absorbent, near infrared absorbent, black carbon, aluminosilicate, fine silica powder, kaolin diatomaceous earth, epoxy resin, polymethyl methacrylate, and the like. It can be formed by dissolving and kneading in a resin to form a resin layer and laminating it on the base film layer or laser welding layer. The resin to be used can be appropriately selected depending on the type of the laser absorbent to be dissolved or kneaded. As such a resin, the resin constituting the base film layer, the resin constituting the laser weld layer, other LDPE, Examples thereof include polyethylene resins such as L-LDPE.

  In addition, when using resin which comprises a laser welding layer as resin, it is not necessary to have a laser welding layer further. FIG. 4 corresponds to such a mode.

  Furthermore, the wound label of the present invention can use a printing layer such as black ink printing as a laser absorbent layer. Since the black ink used for black printing contains black carbon which absorbs infrared rays as a pigment, the black printing layer can be a laser absorbent layer. In addition, the composition of the printing ink includes coloring materials such as pigments and dyes; fats and oils such as drying oils, semi-drying oils, non-drying oils, processing oils, resins such as natural resins, natural product derivatives, synthetic resins, hydrocarbons, Vehicles such as esters, ketones, alcohols, polyhydric alcohols, water and other solvents; compounds, dryers, other dispersants, antifoaming agents, plasticizers, and other auxiliary components that are included after printing In order to form a printing layer, a laser absorber layer can be formed without using a resin or the like.

  As the ultraviolet absorber that can be suitably used in the present invention, a benzophenone-based ultraviolet absorber, a benzotriazole-based ultraviolet absorber, a triazine-based ultraviolet absorber, or the like can be used. These may be commercial products. For example, as benzophenone ultraviolet absorbers, trade names “ULS-935LH”, “ULS-700”, “ULS-635L”, and benzotriazole ultraviolet absorbers manufactured by IPPOSHA For example, trade names “USL-1935LH”, “USL-1700”, “USL-1635” manufactured by IPPOSHA, and trade names “TINUVIN P”, “TINUVIN PFL”, “TINUVIN 234” manufactured by Nagase Sangyo Co., Ltd. , “TINUVIN 326” and “TINUVIN 329”, and examples of the triazine-based ultraviolet absorber include a product name “TINUVIN 1577 FF” manufactured by Nagase Sangyo Co., Ltd.

  Examples of the infrared absorber include fine particles such as aluminosilicate, silica fine powder, kaolin diatomaceous earth, epoxy resin, polymethyl methacrylate, and phthalocyanine-based infrared absorber. The aluminosilicate can be obtained from naturally produced zeolite, artificial zeolite or the like, and the aluminosilicate may be added by adding the zeolite as it is. In this case, the zeolite to be added preferably has a particle size of 0.5 to 6 μm. Zeolite with this particle size absorbs the carbon dioxide laser more efficiently. In the present invention, when aluminosilicate is used, the addition amount is 1 to 10% by mass, preferably 3 to 6% by mass with respect to the polyethylene resin. The polyethylene resin includes low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), metallocene polyethylene, ethylene vinyl acetate copolymer, ethylene acrylic acid copolymer, ethylene propylene copolymer. Etc. and mixtures thereof.

  Further, as the phthalocyanine-based infrared absorber, for example, Nippon Kayaku Co., Ltd., trade name "KP Deeper NR Paste", Nippon Shokubai Co., Ltd., phthalocyanine-based compound, trade name "EX Color", etc. are used. be able to.

  Furthermore, as a near-infrared absorber, there are a cyanine-based near-infrared absorber and a phthalocyanine-based near-infrared absorber, and as a cyanine-based near-infrared absorber, a product name “KAYASORB CY-10” manufactured by Nippon Kayaku Co., Ltd., There are “KAYASORB CY-17”, “KAYASORB CY-20B”, “KAYASORB CY-30B”, and “KAYASORB CY-30T”. Moreover, as a phthalocyanine type compound near-infrared absorber, trade names “Excolor MX-EX-851S”, “Excolor MX-EX-851SS”, “Excolor MX-EX-852S”, “Excolor MX” manufactured by Nippon Shokubai Co., Ltd. -EX-852SS ", manufactured by Nippon Carlit Co., Ltd., and trade name" CIR ".

  In this invention, it is preferable to contain the said laser absorber in resin which comprises a laser absorber layer so that the laser absorptivity in a laser irradiation part may be 10 to 60%. If it is 10% or more, the film absorbs the laser more efficiently and obtains sufficient heat for adhesion, thereby obtaining a tube body with more excellent center seal strength and production efficiency. Moreover, since it is 60% or less, it becomes a tube body with little intensity | strength fall of film itself. That is, if the absorption rate is larger than 60%, depending on the intensity of the laser, the film may be heated more than necessary in a short time, and the film itself may be damaged to cause a decrease in strength, but the absorption rate is 60% or less. By doing so, such a situation can be prevented, and since the laser absorber is not added more than necessary, the tube body in which the transparency of the film itself is prevented from being lowered with little reduction in strength.

  In addition, the above-mentioned ultraviolet absorber, infrared absorber, near infrared absorber, black carbon, pigment for printing ink, dye for printing ink, aluminosilicate, silica fine powder, kaolin diatomaceous earth, epoxy resin, polymethyl methacrylate, and other fine particles A laser absorbent such as a laser absorbent such as can be used when forming the laser absorbent layer, and can also be used as a laser absorbent contained in the laser weld layer. Moreover, it is preferable to contain a laser absorber so that the laser absorptivity in a laser irradiation part may also become 10 to 60% in this case.

  It has been found that even when the laser absorbent layer is formed in the innermost layer of the wound label, it can be decomposed by laser irradiation and laser welding can be suitably performed.

(5) Laser Reflecting Layer In the present invention, it is preferable to have a laser reflecting layer together with a laser welding layer at least on the sticking part of the wound label. When the laser reflection layer is provided, the temperature of the laser welding layer can be raised more intensively and efficiently, and can be bonded by being softened or melted, so that the amount of laser irradiation can be reduced for bonding.

  Such a laser reflecting layer is preferably provided in the innermost layer of the wound label as shown in FIGS. 5, 6, and 7, for example. This is because the laser light is irradiated from the base film layer side of the surface of the wound label, and therefore it is most excellent in laser reflectivity when provided in the innermost layer of the sticking part.

  In the present invention, the laser reflecting layer is preferably made of a metal such as iron, nickel, copper, aluminum, silver, or gold, and aluminum is particularly preferable because it is inexpensive.

  When the laser reflective layer is provided in the innermost layer of the wound label, if the metal is used as a foil, the adhesiveness between the wound label and the container in the sticking portion may be reduced. Therefore, in the present invention, the laser reflecting layer is formed by, for example, aluminum vapor deposition or printing with an aluminum-containing ink. In addition, when using the printing layer by aluminum vapor deposition or an aluminum containing ink, it became clear that it decomposed | disassembled by laser irradiation and laser welding could be performed suitably.

For example, an aluminum vapor deposition layer is formed on a laser welding layer by a reactive vapor deposition method under a vacuum of 10 ⁻¹ to 10 ⁻² Pa, typically by supplying oxygen into a vapor deposition tank using metal aluminum as a vapor deposition source. Can do. In addition, a laser reflective layer may be formed over the full length of the said laser welding layer of a winding label, and may be formed only in a sticking part.

  On the other hand, a leaf-like aluminum paste-added silver ink or the like can be used as the aluminum-containing ink, and the laser reflective layer can be formed by printing.

(6) Design Print Layer The wound label of the present invention may have a print layer laminated on the inside or outside of the base film layer. In this case, the label inner side of the base film layer is not limited to the case where it is formed in contact with the base film layer. In the present invention, the printed layer may be formed over the entire length of the wound label. However, as shown in FIG. The absorbent layer and the laser welding layer may be laminated, and the laser reflective layer may be formed as the innermost layer, or the design printing layer may be formed at a place other than the pasting part. .

  There is no limitation in the printing method, for example, a printing layer can be formed by gravure printing. As the printing layer, one or more ordinary ink vehicles are prepared from a resin and a solvent, and if necessary, a plasticizer, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, and a curing agent. 1 to 2 or more kinds of auxiliaries such as additives, crosslinking agents, lubricants, antistatic agents, fillers, etc. are optionally added, and further colorants such as dyes and pigments are added, and solvents, diluents, etc. The ink composition obtained by sufficiently kneading and adjusting the ink composition can be used.

  As such an ink vehicle, known ones such as sesame oil, drill oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenolic resin, maleic resin, Natural resin, hydrocarbon resin, polyvinyl chloride resin, polyacetic acid resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin , Melamine resin, amino alkyd resin, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, etc. can be used alone or in combination. The ink vehicle serves to carry the colorant from the plate to the substrate and fix it as a coating.

  Further, the drying property of the ink varies depending on the solvent. The main solvents used in printing inks are toluene, MEK, ethyl acetate, and IPA. Solvents with a low boiling point are used for quick drying. However, if the drying is too fast, the printed matter may be faded or printing may not be successful. Yes, a solvent having a high boiling point can be appropriately mixed. This makes it possible to print fine characters neatly. Colorants include dyes that are soluble in solvents and pigments that are insoluble in solvents, and gravure inks use pigments. Pigments are classified into inorganic pigments and organic pigments. Examples of inorganic pigments include titanium oxide (white), carbon black (black), and aluminum powder (gold and silver), and organic pigments are preferably azo. be able to.

  Although the above was demonstrated by gravure printing, printing systems, such as letterpress printing, screen printing, transfer printing, flexographic printing, etc., may be sufficient. The printing may be back printing or front printing.

(7) Outer layer The wound label of the present invention may be further provided with an outer layer on the surface side of the base film layer. As such an outer layer, it can be appropriately selected depending on the use and design properties of the wound label, OP varnish is used to give the label surface slipperiness, and the touch feeling when the label is touched. In the case of using a suede ink, it is preferable to use a matte OP or the like when giving a matte feeling. The outer layer can be a laminate of two or more layers, and a design print layer may be formed on the outer layer. In the wound label of the present invention, the base film layer and the outer layer serve as a support layer, and even when the laser welding layer is softened, it is possible to maintain the form as a label.

(8) Surface treatment In the present invention, prior to the formation of any layer of the above-described wound label, another layer may be formed or laminated after performing a surface treatment in advance. Such surface treatments include corona discharge treatment, ozone treatment, low temperature plasma treatment using oxygen gas or nitrogen gas, glow discharge treatment, oxidation treatment using chemicals, etc., and other pretreatments, etc. is there. In addition, as such a surface treatment, a primer coating agent, an undercoat agent, an anchor coating agent, an adhesive, an evaporation anchor coating agent, or the like may be arbitrarily applied to perform the surface treatment.

(9) Laser The wound label of the present invention is a wound label that can be irradiated with a laser and adhered to a container. The laser that can be used in the present invention may be any of ultraviolet rays, infrared rays, near infrared rays, and the like. In general, lasers include solid lasers, liquid lasers, gas lasers, semiconductor lasers, free electron lasers, etc., depending on the type of medium causing the inducer. In the present invention, the laser wavelength to be irradiated and the laser welding of the wound label It can select suitably according to the absorption wavelength of a layer or a laser absorber.

  Solid-state lasers include a ruby laser in which chromium ions are mixed into a sapphire crystal and a YAG laser in which neodymium ions are introduced into YAG (yttrium, aluminum, garnet crystal). The YAG laser emits infrared light having a wavelength of 1064 nm. By generating a harmonic using a nonlinear optical crystal, green light having a wavelength of 532 nm, ultraviolet light having a wavelength of 355 nm, and the like can be emitted.

  As the liquid laser, there is a dye laser in which dye molecules are dissolved in an organic solvent such as alcohol. The oscillation wavelength can be freely and continuously selected by adjusting the dye used and the resonator.

  Gas lasers include carbon dioxide lasers that emit infrared rays, helium-neon lasers (red), and excimer lasers that use rare gases.

  A semiconductor laser is a laser that utilizes recombination emission of a semiconductor, and can change the wavelength of laser light that oscillates depending on the constituent elements of the semiconductor.

  There is a laser beam that is generated when a magnetic field is applied to a free electron near the speed of light in a vacuum to change the course, and it is called a free electron laser. Depending on the generated laser light, it can be divided into infrared laser, visible laser, ultraviolet laser and so on.

  Lasers can also be classified according to how light is emitted, and there are pulse lasers that emit laser light intermittently and CW lasers (Continuous wave laser) that emit laser light continuously. In the present invention, any can be suitably used.

  In the present invention, any laser can be used as appropriate in accordance with the laser welding layer and the laser absorbent layer constituting the wound label, but those that emit ultraviolet rays, infrared rays, and near infrared rays are preferable. Most simply, it emits infrared rays or near infrared rays as laser light, and a carbon dioxide laser or the like is particularly suitable.

  According to laser welding, a container and a wound label can be welded in a non-contact manner, and since the thermal influence on the peripheral portion is negligible, a container with a wound label having an excellent appearance can be manufactured. In addition, since fine parts and structures can be welded, and there is high reproducibility, there are advantages such as being suitable for mass production.

(10) Method for producing wound label As shown in FIG. 1, the wound label of the present invention comprises a base film layer such as a case where it is composed of polyethylene terephthalate (base film layer) and glycol-modified polyethylene terephthalate (laser weld layer). And the laser welding layer can be coextruded, the base film and the laser welding layer can be formed by coextrusion. As shown in FIG. 4, when the laser welding layer further contains a laser absorbent such as diatomaceous earth, a mixing step of the laser absorbent and the resin capable of laser welding may be included in the pre-coextrusion step. .

  In addition, as shown in FIG. 2, when the laser absorbent layer is provided in addition to the laser weld layer, and the laser absorbent layer is a black ink layer, the above-described base film layer and laser weld layer are provided. For example, black printing may be performed on the laser welding layer of the film having

  In addition, as shown in FIG. 8, for example, when the wound label of the present invention has a design print layer in addition to the affixed part (W) on the base film layer, If the laser absorbent layer is formed by ink printing or the like and one or more design prints are performed on other portions, the laser absorbent layer can be formed simultaneously with the formation of the design print layer. FIG. 8 corresponds to an embodiment in which a laser welding layer is further formed thereon.

  Although not shown in the figure, if the printing part (W) is printed with black ink and aluminum-containing ink, and the design printing is performed on other parts, the laser absorbent layer and the laser reflection layer are formed simultaneously with the formation of the design printing layer. Can be formed.

  Further, the outer layer can be formed by inverting the printing substrate after the laminated film is formed and performing printing with, for example, OP varnish.

(11) Container The container to which the wound label of the present invention can be attached is not particularly limited, and may be any resin that can be adhered by the adhesive. Therefore, the adherend winding label of the present invention is applied, the glass container; inorganic container such as a ceramic bottle; synthetic resin container such as a PET aluminum, iron, metal container, such as SUS; glass, synthetic resin There are containers made of composite materials including ceramic, metal, paper and the like.

On the other hand, when the container is a synthetic resin container, it is lightweight to use a polyester resin as the thermoplastic resin layer constituting the container, and the mechanical strength, heat resistance, gas barrier property, It is preferable because it is excellent in chemical properties, aroma retention, hygiene and the like. The container can be manufactured by injection molding, vacuum forming, pressure forming or the like of polyester resin.

  Specifically, as the polyester resin, a thermoplastic resin composed of a saturated dicarboxylic acid and a saturated dihydric alcohol can be used. Saturated dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, naphthalene-1,4- or 2,6-dicarboxylic acid, diphenyl ether-4,4'-dicarboxylic acid, diphenyldicarboxylic acids, diphenoxyethanediethanedicarboxylic acids Aromatic dicarboxylic acids such as adipic acid, sebacic acid, azelaic acid, decane-1.10-dicarboxylic acid and other alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid, and the like can be used. As the saturated dihydric alcohol, aliphatics such as ethylene glycol, propylene glycol, trimethylene glycol, tetramethylene glycol, diethylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, hexamethylene glycol, dodecamethylene glycol, neopentyl glycol, etc. Glycols, alicyclic glycols such as cyclohexanedimethanol, 2,2-bis (4′-β-hydroxyethoxyphenyl) propane, other aromatic diols, and the like can be used. A preferred polyester is polyethylene terephthalate composed of terephthalic acid and ethylene glycol.

  As the polyester resin, those having an intrinsic viscosity in the range of 0.5 to 1.5 can be used, and those in the range of 0.55 to 0.85 are preferably used. In addition, such polyester is produced by melt polymerization and is subjected to a reduced pressure treatment or an inert gas atmosphere at a temperature of 180 to 250 ° C., or an oligomer or acetaldehyde which is a low molecular weight polymer by solid phase polymerization. What reduced content of is preferable.

  The container according to the present invention may be a single layer of the above thermoplastic resin layer, but may have a multilayer structure in order to ensure gas barrier properties and light shielding properties.

  As the gas barrier resin layer, those having excellent gas barrier properties such as oxygen and carbon dioxide, such as copolymer polyester resin, polyamide resin, ethylene vinyl alcohol copolymer resin (hereinafter also referred to as “EVOH”), polyglycolic acid (hereinafter “ PGA "), high nitrile resin, polyacrylonitrile, copolymer of acrylonitrile, methyl acrylate and butadiene (trade name: Barex), polyvinyl chloride, nylon MXD6 consisting of metaxylylenediamine and adipic acid, polyethylene isophthalate Copolymers and various liquid crystal polyesters can be used. More specifically, B010 (copolyester resin manufactured by Mitsui Pet Resin Co., Ltd.), MX nylon (polyamide resin manufactured by Mitsubishi Gas Chemical Co., Ltd.), XYDAR (manufactured by Dartco), VECTRA (manufactured by Celanese Polyplastics), Econol (manufactured by Sumitomo Chemical), rod run (manufactured by Unitika), EPE (manufactured by Mitsubishi Kasei), X7G (manufactured by Eastman), ULTRAX (manufactured by BASF) and the like.

In addition, as a material excellent in both gas barrier properties and moisture barrier properties, a blend polymer of a polyethylene copolymer (PETG) composed of terephthalic acid, ethylene glycol and cyclohexanedimethanol and an ethylene vinyl alcohol copolymer, or the above PETG and polyvinyl A blend polymer with alcohol can be used.
Among them, nylon MXD-6 can block oxygen and capture oxygen by adding a catalytic amount of a transition metal compound, so that oxygen in the bottle container can be substantially zero. The content is preferable in that it has excellent antioxidant properties.

The transition metal catalyst added to the nylon MXD-6 is necessary to increase the reactivity with oxygen. Specifically, for example, cobalt, manganese, nickel, copper, rhodium, ruthenium, etc. can be used. It is preferred to use cobalt.
The above transition metals are usually used in combination with carbonates, sulfites, thiosulfates, tertiary phosphates, secondary phosphates, organic acid salts, halides, etc., among which 2-ethylhexane It is preferred to use transition metal salts such as cobalt acid, cobalt neodecanoate, cobalt stearate and the like.

  The added amount of the metal salt is preferably about 0.001% to 1% with respect to the resin composition.

  In order to obtain a container having a function of capturing oxygen, for example, in addition to the above MXD-6 nylon, a polybutadiene, a polyisoprene polyolefin resin, a diol resin such as glycol or polybutadiene diol, and a transition metal are used. Added resin composition and reducing and insoluble in water, for example, alkaline earth metal hydroxides, sulfites, carbonates, ascorbic acid and other organic acid salts can be used. Depending on the above, the above-described sensitizer can be used. Specific examples of the sensitizer include, for example, benzophenone, o-methoxybenzophenone, acetophenone, o-methoxyacetophenone, acenaphthenequinone, methyl ethyl ketone, valerophenone, hexanophenone, α-phenylbutyrophenone, p-morpholinopropiophenone, Dibenzosuberone, 4-morpholinobenzophenone, benzoin, benzoin methyl ether and the like can be used.

  Moreover, said gas barrier resin layer can contain resin which comprises said thermoplastic resin layer. This has the advantage that the interlayer adhesion between the thermoplastic resin layer and the gas barrier resin layer can be improved.

  Furthermore, in this invention, you may contain the light absorber which absorbs ultraviolet light in the resin of the thermoplastic resin layer and gas barrier resin layer which comprise the said container. Furthermore, additives such as lubricants, stabilizers, antioxidants, anti-thermal degradation agents, antistatic agents, antibacterial agents and other resins and other resins are added to the resin forming the container as long as the object of the present invention is not impaired. be able to. In addition, it is preferable that the said gas barrier layer is 5 mass% or less with respect to the weight of a thermoplastic resin. When it exceeds 5 mass%, the use of the recycled PET resin in the container is limited, which is not preferable.

  An inorganic oxide vapor deposition layer may be laminated on the inner side of the container used in the present invention in order to further secure light shielding properties and gas barrier properties. It is preferable because it has excellent oxygen gas barrier properties and water vapor barrier properties, can suppress the eluate from the resin constituting the container, has excellent fragrance retention, and can maintain the quality of the filling for a long period of time. The thin film can be formed by chemical vapor deposition.

  In the present invention, the cap body attached to the mouth portion needs to have heat resistance, pressure resistance, water resistance, and light shielding properties. Specifically, the cap body is, for example, polyethylene resin, polypropylene resin, polystyrene resin, polycarbonate resin, polyester resin, polyamide resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile- It can be manufactured using an injection molding method or the like using a resin having high heat resistance such as a styrene-butadiene copolymer (ABS resin), a polyacetal resin, and the like. In the above, a cap or the like provided with an annular body having a pilfer loop function may be used. Also in this case, it can be manufactured by using an injection molding method or the like using a resin as described above, using a molding die or the like matching the shape. In addition, the cap is made of a metal such as aluminum or a plastic having a structure in which an oxygen gas barrier resin layer is provided on the inner surface side of the resin layer rich in heat resistance in order to impart oxygen gas barrier properties. A cap can be used. The specification of the plastic cap may be a one-piece specification in which an oxygen gas-absorbing resin layer is formed on the inner surface of the cap by in-shell molding, or a sheet having the same function, a so-called liner, is bonded to the inner surface. A two-piece specification may be used.

As a shape of the container, the container cross section of the sticking part of the wound label on the body part is not limited to a round shape, and may be a polygonal shape such as a square or an octagon. In addition, the container body of the wound label affixing part is not limited to the same diameter over the entire length of the body part, and other than the container body vertical section being a square, for example, a gourd type Good . As shown in FIG. 9, the container has a minimum peripheral diameter (minimum peripheral diameter × 100 / maximum peripheral diameter (%)) with respect to the maximum peripheral diameter in the wound label attaching part of the trunk part of 50 to 100%, more preferably 70. It is preferable to use ˜90%, particularly preferably 75 to 85%. In addition, in this invention, when it is a shrink label, in the container with a shrink label, when it is a shrink label, the container part by which a shrink label is coat | covered means. Furthermore, it is preferable that the peripheral diameters of W1 and W2 are equal with respect to a portion to which the wound label of the container is fixed, for example, W1 and W2 in the case shown in FIG. This is because fixing is easy if the outer periphery and the container radius of the portion where the label is fixed are equal.

(12) Manufacturing method of container with winding label In this invention, a wound label is stuck to the said container by irradiating a laser beam to a winding label, It is characterized by the above-mentioned. As the laser to be used, the various lasers described above can be used. In particular, a carbon dioxide laser having a wavelength of 10.6 μm can be preferably used.

  In the present invention, the wound label and the container are overlapped, and the label and the container are fixed by irradiating laser from the surface side of the wound label. In the case of adhesion by laser irradiation, unlike the adhesion by hot melt adhesive, for example, there is no need to bond the container and the wound label by pressing and pressing, and both are fixed without contact by laser irradiation. Can do. By laser irradiation, the laser welding layer of the wound label absorbs the light energy of the laser. As a result, the laser welding layer is softened and melted, and the wound label and the container are bonded. The irradiation amount at this time is 5 to 200 W.

  Next, the remaining part of the wound label is wound around the outer periphery of the container, and laser is irradiated from the surface side of the label terminal part to fix the label to the container. When the laser is irradiated from the surface side of the end portion of the wound label, the laser welding layer of the end pasting portion absorbs the light energy of the laser, and as a result, the laser welding layer is softened and melted, and the wound label is fixed to the container. be able to.

  In addition, when the wound label is a shrink label, the container with the wound label manufactured in this way is heated with hot air at a predetermined temperature, for example, 60 to 230 ° C., or steam with condensation of water vapor and water vapor. Alternatively, when the shrink label is highly shrunk in the circumferential direction by applying radiant heat such as infrared rays, the body of the container can be covered with the shrink label.

  EXAMPLES Next, although an Example is given and this invention is demonstrated concretely, these Examples do not restrict | limit this invention at all.

Example 1
Polyethylene terephthalate and glycol-modified polyethylene terephthalate are co-extruded and longitudinally uniaxially stretched, and a laminated film of a polyethylene terephthalate film (outer surface: polyethylene terephthalate 40 μm, inner surface; glycol-modified polyethylene terephthalate 10 μm) having a thickness of 50 μm is used. Design printing and an OP varnish layer having a thickness of 3 μm were formed on the surface of terephthalate, and a wound label was produced so that the longitudinal uniaxial stretching direction was the winding direction. In addition, the thermal shrinkage rate of this wound label was 47% at 95 ° C. in the vertical direction.

Example 2
Polyethylene terephthalate and glycol-modified polyethylene terephthalate are co-extruded and longitudinally uniaxially stretched, and a laminated film of a polyethylene terephthalate film (outer surface: polyethylene terephthalate 40 μm, inner surface; glycol-modified polyethylene terephthalate 10 μm) having a thickness of 50 μm is used. On this layer, a design printing layer having a thickness of 8 μm was formed using an acid value titanium (white), black, white and green pigments as inks. At the same time, a black printing layer (laser absorber layer) having a thickness of 4 μm was formed using black ink on the label attaching portion. Subsequently, an OP varnish layer having a thickness of 3 μm was formed on the surface of polyethylene terephthalate having a thickness of 40 μm, and a wound label was manufactured so that the longitudinal uniaxial stretching direction was the winding direction. In addition, the thermal shrinkage rate of this wound label was 47% at 95 ° C. in the vertical direction.

Example 3
A 30 μm thick single-sided heat-seal type stretched polypropylene film (trade name “P3162”, manufactured by Toyobo Co., Ltd.) is used, and black ink is used on the heat-sealed surface. ) Was formed. Next, an OP varnish layer having a thickness of 3 μm was formed on the surface of the stretched polypropylene film to produce a wound label. The thermal shrinkage rate of this wound label was 4% at 120 ° C. in the longitudinal direction (winding direction).

Example 4
A wound label was produced in the same manner as in Example 3 except that a silver ink printing layer (laser reflection layer) was further formed on the black ink printing layer (laser absorber layer).

Example 5
The starting end affixing part of the wound label produced in Example 2 is brought into contact with the PET bottle body having irregularities on the winding label affixing torso shown in FIG. Manufactured by “DIAMOND K250” ) , a laser beam was irradiated at a pulse interval of 500, a pulse width of 22, 12 m / min, and 22 W, and the label start end was fixed to the container. Next, the remaining part of the wound label is wound around the PET bottle body, and a carbon dioxide laser ("DIAMOND K250" manufactured by Coherent Co., Ltd. is used from the upper end to the lower end of the surface of the wound label terminal pasting part, A laser beam was irradiated at a width of 22, 12 m / min and 22 W to produce a container with a wound label.

  Next, the container with a wound label was steam-treated at a temperature of 75 to 96 ° C. to heat-shrink the wound label.

Example 6
The starting end sticking part of the wound label produced in Example 3 is brought into contact with the cylindrical part of the cylindrical PET bottle having no irregularities and taper on the winding label sticking scheduled sticking part, and a carbon dioxide laser ( Using a “DIAMOND K250” manufactured by Coherent Co., Ltd. ) , laser light was irradiated at a pulse interval of 500, a pulse width of 70, 12 m / min, and 70 W, and the label start end was fixed to the container. Then, the remaining part of the wound label is wound around the PET bottle body, and a carbon dioxide laser (“DIAMOND K250”, manufactured by Coherent Co., Ltd. is used from the upper end to the lower end of the surface of the wound label terminal pasting part, the pulse interval 500, the pulse width Laser light was irradiated at 70, 12 m / min, 70 W, the label was fixed to the container, and a container with a wound label was manufactured.

Example 7
The starting end sticking part of the wound label produced in Example 4 is brought into contact with the cylindrical PET bottle body without irregularities and taper on the body to be attached to the winding label, and a carbon dioxide laser ( Using a “DIAMOND K250” manufactured by Coherent Co., Ltd. ) , a laser beam was irradiated at a pulse interval of 500, a pulse width of 50, 12 m / min, and 50 W, and the label start end was fixed to the container. Next, the remaining part of the wound label is wound around the PET bottle body, and a carbon dioxide laser ("DIAMOND K250" manufactured by Coherent Co., Ltd. is used from the upper end to the lower end of the surface of the wound label terminal pasting part, Laser light was irradiated at a width of 70, 12 m / min, 70 W, the label was fixed to the container, and a container with a wound label was manufactured.

Comparative Example 1
A hot melt adhesive was applied to a thickness of 7 μm on a 50 μm-thick polyethylene terephthalate sticking part. Next, an OP varnish layer having a thickness of 3 μm was formed on the surface of the stretched polyethylene terephthalate to produce a wound label.

  The wound label was attached to the body of a PET bottle having a shape shown in FIG.

  Next, the container with a wound label was steam-treated at a temperature of 75 to 96 ° C. by a shrink tunnel, and the wound label was thermally contracted.

  As a result, peeling of the label from the container was observed with the label in the shrink tunnel.

  The wound label according to the present invention can be directly adhered to the container by irradiating laser light, and the stability of the adhesive surface is ensured, so that the outer appearance is excellent and the container with the wound label can be manufactured at high speed. Can and is useful.

FIG. 1 is a cross-sectional view illustrating a wound label of the present invention comprising a base film layer (10) and a laser weld layer (20). 1 is a cross-sectional view illustrating the wound label of the present invention, showing a mode in which the wound label of FIG. 1 further includes a laser absorbent layer (30), and the laser absorbent layer (30) is laminated on the innermost layer. is there. 1 further includes a laser absorbent layer (30), and the laser absorbent layer (30) is formed between the base film layer (10) and the laser weld layer (20). It is a cross-sectional view explaining the winding label of this invention which shows. The laser welding layer (20) of the wound label in FIG. 1 contains a laser absorber, and the laser absorber-containing laser welding layer (25) is laminated on the base film layer (10). It is a cross-sectional view explaining a wound label. It is a cross-sectional view explaining the wound label of this invention which has a laser reflective layer (40) in a label innermost layer. It is a cross-sectional view explaining the winding label of this invention which shows the aspect which has a design printing layer (50) inside a base film layer (10). In the wound label of FIG. 6, it is a cross-sectional view explaining the wound label of this invention which shows the aspect which forms an outer layer (60) on the outer side of a base film layer (10) further. A base film layer (10), a laser absorber layer (30), and a laser welding layer (20) are laminated on the sticking part (w), and the base film layer (10) and the design printing layer other than the sticking part are laminated. (50) and the aspect by which a laser welding layer (20) is laminated | stacked is shown. In addition, the sticking part was formed in the label start end part and label end part. A container that can be used in the present invention and has a recess having a minimum peripheral diameter (minimum peripheral diameter × 100 / maximum peripheral diameter (%)) of 50-100% with respect to the maximum peripheral diameter in the label adhesion portion of the trunk portion FIG.

Explanation of symbols

10 ... base film layer,
20: Laser welding layer,
25 ... Laser welding layer containing laser absorber,
30 ... Laser absorber layer,
40 ... Laser reflection layer,
50 ... design printing layer,
60 ... outer layer,
W: Affixing part.

Claims (16)

A winding label that is directly attached to the outer peripheral surface of the body of the container,
Affixed to the container by laser welding ,
Including a base film layer, a laser weld layer and a laser absorber layer,
The laser absorber layer is one or more selected from the group consisting of an ultraviolet absorber-containing layer, an infrared absorber-containing layer, a near-infrared absorber-containing layer, and a black ink layer, label. The wound label according to claim 1, wherein the laser welding layer is a resin layer having a melting point of 75 to 360 ° C. The said laser welding layer contains 1 or more substances selected from the group which consists of a ultraviolet absorber, an infrared absorber, a near-infrared absorber, and a pigment for printing inks, The Claim 1 or 2 characterized by the above-mentioned. Wrap label as described. Furthermore, it has a laser reflective layer, The winding label in any one of Claims 1-3 characterized by the above-mentioned. The wound label according to claim 4, wherein the laser reflecting layer is an aluminum vapor-deposited layer or a printed layer of an aluminum-containing ink. The wound label according to any one of claims 1 to 5, wherein the base film layer is a polylactic acid film, a polystyrene film, a polyester film, or a polyolefin film. The base film layer includes a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a foamed polystyrene film, a laminate film of a nonwoven fabric and a shrink film, and a stretched polyester-polystyrene. The shrink wound label according to any one of claims 1 to 6, comprising at least one film selected from the group consisting of coextruded films and having a heat shrinkage rate of 5 to 85%. The wound label according to any one of claims 1 to 7, wherein a design printing layer is further laminated inside the label of the base film layer. The wound label according to any one of claims 1 to 8, wherein the base film layer is further laminated with an outer layer on the label surface side of the base film layer. A container with a wound label, wherein the wound label according to any one of claims 1 to 9 is attached to the container by laser welding. The container has a recess having a minimum peripheral diameter (minimum peripheral diameter x 100 / maximum peripheral diameter (%)) of 50 to 100% with respect to the maximum peripheral diameter in the wound label attaching portion of the trunk portion. Item 11. A container with a wound label according to Item 10. A method of manufacturing a wound label that is directly attached to the outer peripheral surface of the body of the container,
A method for producing a wound label, comprising a base film layer and a laser weld layer, wherein the laser absorber layer is formed by printing with a carbon-containing ink on the base film layer or the laser weld layer. A design printing layer is formed by partially printing with one or more printing inks on the laser film of the laminated film of the base film layer or the base film layer and the laser welding layer. 13. The laser absorber layer according to claim 12, wherein a laser absorber layer is formed by partially printing with black ink on a material film layer or on a laser welding layer of a laminated film of the base film layer and the laser welding layer. , A manufacturing method for wound labels. 14. The wound label according to claim 13, wherein after forming the laser absorber layer, a laser reflective layer is formed on at least the laser absorber layer by performing aluminum vapor deposition or printing with an aluminum-containing ink. Manufacturing method. The wound label and the container according to any one of claims 1 to 9 are overlapped, and the label and the container are fixed by irradiating a laser from the surface side of the wound label,
A method for producing a container with a wound label, wherein after the remaining part of the wound label is wound around the outer periphery of the container, the label is fixed to the container by irradiating a laser from the surface side of the label terminal part. The manufacturing method of the container with a wound label of Claim 15 including the process of heating at the temperature of 60-230 degreeC, and heat shrinking the said wound label next to the process of fixing the said label.

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