JP4880966B2 - Label for container having matte coating layer, and container with label - Google Patents

Description

  The present invention relates to a container label having a matte coating layer, and a labeled container attached so that the label covers the entire circumference of the container main body.

  Plastic bottles for beverages such as soft drinks, tea, coffee beverages, containers such as metal cans, glass bottles, etc. have labels such as shrink labels printed with product name, design, description of contents, etc. It is mounted so as to cover the entire circumference of the container main body. In recent years, a matte coating layer (matte layer) is often provided on a part of the surface on the non-contact side with respect to a label container in order to improve design and expression (see, for example, Patent Document 1). ). In such a label, a novel design is created because a portion where the original gloss of the base film is developed and a matte mat portion coexist on the label surface. However, since a container equipped with such a label has an exposed base film portion having a low slip property and a matte coating layer portion having a high slip property on the surface, surface friction differs depending on the part. For this reason, in a production line such as a filling process of contents, when the container and the line wall surface come into contact with each other, the resistance varies depending on the contact part in the container, so that the flow of the container becomes irregular and the container falls down. The problem that the line stagnates. In addition, when a container (product) containing contents is loaded in a vending machine, the resistance varies depending on the contact portion of the container when the container contacts the floor surface or side wall of the passage from the product installation table to the product outlet. Therefore, it stops in the middle of the passage, or moves obliquely with respect to the traveling direction and stops by hitting the side wall, causing a problem that the product is not smoothly discharged to the outlet.

JP 2005-91806 A

  An object of the present invention is to provide a container label having a matte coating layer capable of suppressing and preventing clogging of a container in a production line, clogging, and clogging when loaded into a vending machine, and a label equipped with the label for the container To provide a container.

  As a result of intensive studies to achieve the above-mentioned object, the present inventors have determined that, in a container label having a matte coating layer, a portion other than the portion where the matte coating layer is provided on the surface on the non-contact side with respect to the container. If the surface is formed with a specific topcoat layer exposed, the bottle will flow smoothly without falling or clogging in the content filling line, etc., or when it is loaded into a vending machine In addition, the present inventors have found that the product smoothly falls to the outlet and completed the present invention.

That is, the present invention is a container label for covering the entire circumference of the container main body, in which a matte coating layer is provided on a part of the surface on the non-contact side with respect to the container, and contains a lubricant. The top coat layer is provided in a state of being exposed at a portion other than the portion where the matte coating layer is provided on the surface on the non-contact side with respect to the container , and the matte coating layer is averaged with the base resin. The top coat layer is composed of a base resin and a particulate solid substance which is a lubricant having an average particle diameter of 1 to 12 μm. Both the static friction coefficient for the stainless steel plate on the outer surface of the layer and the static friction coefficient for the stainless steel plate on the outer surface of the matte coating layer are 0.45 or less, and the topcoat layer The container label is characterized in that the difference between the static friction coefficient of the outer surface of the stainless steel plate and the static friction coefficient of the matte coating layer with respect to the stainless steel plate is within 0.10 .

  The present invention also provides a labeled container in which the container label is mounted so as to cover the entire circumference of the container main body.

  According to the present invention, since the topcoat layer containing a lubricant is exposed on the surface other than the portion where the matte print layer is provided on the surface on the non-contact side with respect to the container, the matte print layer The difference in slipperiness between the part and the other part is reduced (the surface friction of the container is equalized), and the friction between the container and the other container or the conveyance path wall surface is made uniform. For this reason, in a production line such as a content filling line, it is possible to suppress and prevent container overturning and clogging of the line, and even when a container with contents is loaded into a vending machine, it can be moved from the product installation stand to the product removal port. There is no clogging in the path to reach, and it is smoothly discharged to the outlet.

  Hereinafter, the present invention will be described in detail with reference to the drawings as necessary. FIG. 1 is a perspective view showing an example of a labeled container of the present invention. This labeled container 1 is composed of a container (square tube bottle) composed of a container body 2 and a lid (cap) 3 and a container label 4. The container label 4 has a matte coating layer portion 4a occupying the upper half provided with a matte coating layer (matte layer) on the surface on the non-contact side with respect to the container, and a surface on the non-contact side with respect to the container. The top coat layer portion 4b occupies the lower half provided with a top coat layer containing a lubricant, and is mounted so as to cover the entire circumference of the body portion and a part of the shoulder portion of the container body 2. ing.

  FIG. 2 is a perspective view showing another example of the labeled container of the present invention. The labeled container 11 is composed of a container (square tube bottle) composed of a container body 2 and a lid (cap) 3 and a container label 4. The container label 4 contains a matte coating layer portion 4a in which a matte coating layer (matte layer) is provided on the non-contact side surface of the container, and a lubricant on the non-contact side surface of the container. The top coat layer portion 4b is exposed from the top coat layer, and is mounted so as to cover the entire circumference of the entire trunk portion and the shoulder portion of the container body 2. The top coat layer portion 4b has a circular shape at the front center of the container body, and the other portion of the label is the matte coating layer portion 4a.

  In the container with a label as described above, since the lubricant is contained in the top coat layer portion 4b occupying a part of the label surface, the line wall surface (for example, a metal wall surface such as stainless steel) of the top coat layer portion 4b, etc. The slipperiness with respect to the line wall surface of the matte coating layer portion 4a occupying the other part of the label surface is approximated. Therefore, when the container and the line wall are in contact with each other in a production line such as a content filling line, or in the vending machine (especially a hot bender where temperature is high and slipperiness is likely to decrease), When contacting the floor or side wall of the passage to the outlet, irregular movements caused by differences in slipperiness of each part of the container surface, traffic jams, clogging, etc. can be suppressed and prevented, and the container can be smoothly Can be transported and unloaded.

  The material of the container body 2 is not particularly limited, and may be any of plastic, metal (aluminum, stainless steel, etc.), glass, paper, and the like. Examples of materials for plastic containers include polyester resins [polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.], polystyrene resins (polystyrene, etc.), polyolefin resins [low density polyethylene (LDPE), Polyethylene such as high-density polyethylene (HDPE), polypropylene, etc.], thermoplastic resins that can be blow-molded, such as polyvinyl chloride, polycarbonate, and arylate resins.

  There is no restriction | limiting in particular as a shape of the trunk | drum of the container main body 2, For example, the cylindrical shape whose cross section is a circle or an ellipse, the polygonal column shape whose cross section is a square or a hexagon, a cone shape, a polygonal pyramid shape etc. are mentioned. The body surface may have irregularities, flat surfaces, and the like. A preferable container body 2 includes a square plastic bottle having a substantially square cross section or a polygon. The container main body 2 has a mouth part, a shoulder part, a trunk | drum, and a bottom part, for example.

  The container label 4 covers at least the entire circumference (all or a part) of the container body 2, and the surface on the container non-contact side at the position corresponding to the trunk part is matte. What is necessary is just to be comprised by the site | part which is a coating layer (mat layer), and the site | part which is a topcoat layer containing a lubricant. In addition, when the container label 4 also covers a part other than the body part (for example, the shoulder part) of the container body 2, the slipperiness of the label surface at a position corresponding to the part other than the body part particularly affects the transportability. Therefore, it is not always necessary to provide a top coat layer containing the lubricant on the label surface.

  The container label 4 was a shrink label using a heat-shrinkable film as a base material, a stretch label using a self-stretchable film as a base material, and a heat-shrinkable and self-stretchable film as a base material. Any label such as a stretch shrink label, a pressure-sensitive adhesive label provided with a pressure-sensitive adhesive layer on one side of the substrate, and a heat-sensitive label provided with a heat-sensitive adhesive layer on one side of the substrate may be used. The base material constituting the container label 4 may be any material that has self-supporting properties, and may be appropriately selected from, for example, a plastic film, paper, metal foil, or a laminate thereof according to the type of label. Can be used. In order to obtain a glossy appearance, the substrate is preferably composed of a plastic film in the case of a single layer, and the outermost layer is composed of a transparent plastic film in the case of a laminate. The printing layer (display printing layer) that displays product names, illustrations, handling precautions, etc., is the opposite side of the transparent base material to the matte coating layer and the topcoat layer containing the lubricant. Can be formed. Moreover, a printing layer (display printing layer) can also be formed between a base material and the topcoat layer containing a matte coating layer and / or a lubricant.

  Hereinafter, the case where the container label is a shrink label will be mainly described. FIG. 3 is a schematic sectional view showing an example of a container label 4 (container label of the present invention). The container label 4 includes a base material 5, a matte coating layer (matte layer) 8 formed on a part of the one surface (left half in the figure), and one surface of the base material 5. The top coat layer (overcoat layer) 9 containing the lubricant formed in the remaining portion (the right half in the figure), the printed layer 6 formed on the other surface of the substrate 5, and further formed thereon A shrink label composed of the white solid printed layer 7 formed. The surface of the white solid printed layer 7 is a surface on the contact side with respect to the container, and the surfaces of the matte coating layer 8 and the top coat layer 9 are surfaces on the non-contact side with respect to the container. Further, in the container label 4, the portion where the matte coating layer 8 is provided on the surface on the non-contact side with respect to the container is the matte coating layer portion 4 a, and on the surface on the non-contact side with respect to the container The portion where the top coat layer 9 is provided is the top coat layer portion 4b.

  FIG. 4 is a schematic sectional view showing another example of the container label 4 (container label of the present invention). The container label 4 includes a base material 5, a top coat layer (overcoat layer) 9 provided on one surface of the base material 5, and a matte coating layer formed on a part of the top coat layer. This is a shrink label composed of (matte layer) 8, a printed layer 6 formed on the other surface of the substrate 5, and a white solid printed layer 7 formed thereon. The surface of the white solid printed layer 7 is a surface on the contact side with respect to the container, and the surfaces of the matte coating layer 8 and the top coat layer 9 are surfaces on the non-contact side with respect to the container. Further, in the container label 4, the portion where the matte coating layer 8 is provided on the surface on the non-contact side with respect to the container is the matte coating layer portion 4 a, and on the surface on the non-contact side with respect to the container The portion where the top coat layer 9 is exposed is the top coat layer portion 4b. In the present invention, as in this example, the top coat layer 9 may be present on the inner side (base material side) of the matte coating layer 8 in the matte coating layer portion 4a.

  FIG. 5 is a schematic sectional view showing still another example of the container label 4 (container label of the present invention). The container label 4 includes a base material 5, a printed layer 6 formed on one surface of the base material 5, and a matte coating formed on a part of the entire surface (the left half in the figure). A shrink label composed of a layer 8 and a topcoat layer 9 containing a lubricant formed on the remaining part of the entire surface (the right half in the figure). In this example, the surface of the substrate 5 opposite to the printed layer 6 is the surface in contact with the container, and the matte printed layer 8 and the top coat layer 9 are on the non-contact side with respect to the container. In terms. In the container label 4 as in FIG. 3, the portion where the matte coating layer 8 is provided on the non-contact surface of the container is the matte coating layer portion 4a. The portion where the top coat layer 9 is provided on the non-contact side surface is the top coat layer portion 4b.

  As the substrate 5, a plastic film having heat shrinkability is used. As the material for the plastic film, for example, thermoplastic resins such as polyester, styrene resin (styrene-butadiene copolymer, etc.), polyolefin resin (polyethylene, polypropylene, etc.), polyvinyl chloride, polyvinylidene chloride, and the like are suitable. used. The polyester includes various polyesters composed of a dicarboxylic acid component and a diol component. As the polyester, terephthalic acid and ethylene glycol are used as the main components of the dicarboxylic acid component and the diol component, respectively, and the copolymerization component is a dicarboxylic acid such as isophthalic acid, phthalic acid, adipic acid, sebacic acid, naphthalenedicarboxylic acid, Copolyesters using diol components such as diethylene glycol, neopentyl glycol, polyalkylene glycol, 1,4-cyclohexanedimethanol are preferably used.

  The substrate 5 may be composed of either a single layer film or a multilayer film. The thickness of the substrate 5 can be appropriately selected in consideration of the appearance, the handleability of the label, the cost, etc., but is generally about 20 to 80 μm, preferably about 30 to 60 μm.

  The print layer 6 is a layer displaying a product name, an illustration, handling precautions, and the like, and can be formed by a conventional printing method such as gravure printing or flexographic printing. The printing ink used for forming the printing layer 6 is not particularly limited and can be appropriately selected according to the printing method. The thickness of the printing layer 6 is not particularly limited and is, for example, about 0.1 to 5 μm.

  The white solid print layer 7 is a layer serving as a background of the print layer 6, and is formed on the entire surface of the substrate 5 so as to cover the print layer 6. The white solid printing layer 7 is usually formed by printing a printing ink containing a concealing pigment such as titanium oxide using a conventional printing method such as gravure printing. The thickness of the white solid print layer 7 is, for example, about 1.0 to 10 μm. The white solid print layer 7 is not necessarily provided.

  The matte coating layer 8 is composed of a base resin and particles having a matte action. The base resin is not particularly limited, and for example, a thermoplastic resin such as polyester, polyvinyl chloride, polyvinyl acetate, cellulose resin, acrylic resin, or urethane resin can be used. The base resins can be used alone or in combination of two or more.

  The particles having a matting effect are not particularly limited, and publicly known or commonly used mat layer forming particles can be used. Examples of the particles include organic particles such as acrylic beads, hollow acrylic beads, and melamine resin; inorganic particles such as silica, alumina, calcium carbonate, and barium sulfate. These particles can be used alone or in combination of two or more. The average particle size of the particles having a matting effect is usually 0.5 to 30 μm, preferably 1 to 20 μm, although it varies depending on the type of particles.

  The amount of the particles having a matting effect in the matte coating layer 8 can be appropriately selected within a range not impairing the design, but generally 5 to 50% by weight, preferably 7 to 40% by weight in terms of solid content, Preferably it is 10-25 weight%.

  The matte coating layer 8 may contain an additive as necessary. Examples of such additives include anti-settling agents, lubricants, dispersion stabilizers, extender pigments and various colorants, fillers, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, and the like.

  The matte coating layer 8 is used to print or apply a matte coating agent (matt varnish) containing the base resin, particles having a matting effect, a solvent, and various additives as necessary, to a predetermined portion of the substrate. And can be formed by drying. The solvent is not particularly limited. For example, acetates such as ethyl acetate, propyl acetate, and butyl acetate; alcohols such as methanol, ethanol, isopropyl alcohol, and butanol; ketones such as acetone and methyl ethyl ketone; Hydrocarbons; and mixed solvents thereof. The thickness of the matte coating layer 8 is, for example, about 0.5 to 5 μm.

  The glossiness (gloss) of the matte coating layer 8 can be appropriately selected in consideration of design properties and the like, but is usually 5 to 50, preferably 7 to 30. The glossiness is a value measured according to JIS K 5600-4-7 (angle 60 °).

  The topcoat layer 9 containing the lubricant is composed of a base resin and a lubricant. The base resin is not particularly limited, and for example, a thermoplastic resin such as polyester, polyvinyl chloride, polyvinyl acetate, cellulose resin, acrylic resin, or urethane resin can be used. The base resins can be used alone or in combination of two or more.

  Any lubricant may be used as long as it has an effect of improving slipperiness, and any of organic lubricants and inorganic lubricants can be used. Examples of the lubricant include particulate solid substances (particularly particulate solid substances), waxes, silicone oils, and the like. A lubricant can be used individually or in mixture of 2 or more types. When two or more types are used in combination as a lubricant, inorganic particles (particularly inorganic fine particles) or a combination of silicone oil and wax is preferable.

  The particulate solid material includes inorganic particles (powdered inorganic material and the like) and organic particles (powdered organic material and the like). Examples of inorganic particles include silica, talc, mica, kaolin, bentonite, clay, graphite, graphite fluoride, carbon black, titanium oxide, zinc oxide, magnesium oxide, boron nitride, molybdenum disulfide, tungsten disulfide, and calcium carbonate. , Calcium sulfate, calcium titanate, calcium phosphate, calcium hydroxide, aluminum hydroxide, magnesium hydroxide, glass powder, alumina, metal powder and the like. Examples of the organic particles include higher alcohols such as stearyl alcohol, higher fatty acids such as stearic acid, higher fatty acid esters such as butyl stearate, fatty acid and polyhydric alcohol partial esters such as glycerin fatty acid ester, stearic acid amide, ethylene bis Higher fatty acid amides such as stearylamide, salts of higher fatty acids such as barium stearate, calcium stearate, zinc stearate, aluminum stearate and magnesium stearate (metal soap), polyacetal, poly (meth) acrylic acid metal salt, polyacrylonitrile , Powders of polyacrylic acid amide, melamine resin, phenol resin, starch, cellulose resin, fluororesin and the like. Of the organic particles, a fluororesin is preferable.

  As the fluororesin, a resin containing at least a fluorine atom-containing monomer as a monomer component can be used. That is, the fluororesin may be a polymer containing only a fluorine atom-containing monomer, a fluorine atom-containing monomer, and a copolymerizable monomer copolymerizable with the fluorine atom-containing monomer. It may be a copolymer.

  As the fluorine atom-containing monomer, a fluorine atom-containing vinyl monomer can be suitably used. Examples of the fluorine atom-containing vinyl monomer include tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene, 1,1-difluoroethylene (vinylidene fluoride), 1,2-difluoroethylene, monofluoroethylene ( Fluorinated ethylene such as vinyl fluoride); fluorinated propylene such as hexafluoropropylene; fluorinated isobutylene such as hexafluoroisobutylene; perfluoro (methyl vinyl ether), perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether), etc. Examples include perfluoro (alkyl vinyl ether). A fluorine atom containing monomer can be used individually or in combination of 2 or more types.

  Examples of the copolymerizable monomer include, in addition to olefinic monomers such as ethylene and propylene, acrylic monomers such as methyl (meth) acrylate and ethyl (meth) acrylate; vinyl chloride, Chlorine atom-containing vinyl monomers such as vinylidene chloride; vinyl esters such as vinyl acetate; vinyl ethers such as methyl vinyl ether and ethyl vinyl ether; styrene monomers such as styrene, vinyl toluene, and α-methyl styrene. . A copolymerizable monomer can be used individually or in combination of 2 or more types. As the copolymerizable monomer, a copolymerizable monomer containing a functional group such as a carboxyl group-containing vinyl monomer may be used.

  Typical examples of the fluororesin include, for example, polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), polyvinyl fluoride (PVF), tetrafluoroethylene-hexafluoropropylene. Copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer (EPE), tetrafluoroethylene-ethylene copolymer ( ETFE), chlorotrifluoroethylene-ethylene copolymer (ECTFE), and the like. In the present invention, as the fluororesin, polytetrafluoroethylene or tetrafluoroethylene and other fluorine atom-containing monomers (such as hexafluoropropylene and perfluoroalkyl vinyl ether) and / or copolymerizable monomers (ethylene And the like (tetrafluoroethylene copolymer) can be suitably used. A fluororesin can be used individually or in combination of 2 or more types.

  In the organic particles (resin powder, etc.) such as fluororesin, the form is not particularly limited, and may be, for example, a fixed shape (substantially spherical shape, substantially square shape, substantially flat shape, substantially needle shape, etc.) May be an indefinite shape. Further, it may be isotropic or anisotropic. Furthermore, the cross-section of the organic particles may be rounded (substantially circular), angular (substantially square), serrated or jagged, and further pointed (pointed) ) And the like. For example, as a powder of fluororesin, the cross-section is not constant, and powder having an indefinite shape having a pointed part, a concave part, a convex part, a thread part, a fibrous part, a spherical part, a flat part, a hole part, etc. Can be used. In addition, the fluororesin powder which has a fibrous form (fiber form) can exhibit an anchor effect.

  In the particulate solid substance (for example, fluororesin powder), the average particle diameter is not particularly limited, but the average particle diameter is preferably 15 μm or less. Specifically, the average particle diameter of the particulate solid substance is, for example, about 0.01 to 20 μm, preferably about 0.1 to 15 μm, and more preferably about 1 to 12 μm. If the average particle size of the particulate solid material is too small, it may not contribute to the improvement of slipperiness. If the average particle size of the particulate solid material is too large, the gloss of the top coat layer 9 forming portion is lowered, the difference from the matting coating layer 8 forming portion is reduced, and the design properties are lowered.

  Mineral wax such as microcrystalline wax, oxidized microcrystalline wax, paraffin, oxidized paraffin, montan wax; polyethylene wax, polypropylene wax, oxidized polyethylene wax, oxidized polypropylene wax, chlorinated polyethylene wax, chlorinated Synthetic waxes such as polypropylene wax, ethylene-acrylic acid copolymer wax, ethylene-vinyl acetate copolymer wax, polycarbonate wax; lacquer wax, beeswax, white wax, wood wax, whale wax, petrolatum, lanolin, carnauba wax, cane Natural waxes such as wax, candelilla wax, shellac wax, rice wax and sugar wax are included. The silicone oil is not particularly limited, and a silicone oil usually used for improving slipperiness can be used.

  As a lubricant, when a wax such as polyethylene wax and silicone oil are used in combination, the ratio of both can be selected from a wide range. For example, wax / silicone oil = 1/99 to 99/1. , Preferably, it can select from the range of 10/90-90/10.

  The amount of the lubricant in the topcoat layer 9 containing the lubricant can be appropriately selected within a range that does not impair the design property, label mounting property, etc., but is generally 0.3 to 30% by weight, preferably 1 in terms of solid content. ~ 25% by weight.

  The top coat layer 9 may contain an additive as necessary. Examples of such additives include anti-settling agents, lubricants, dispersion stabilizers, extender pigments and various colorants, fillers, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, and the like.

  The top coat layer 9 is obtained by printing or applying a top coat agent (transparent varnish) containing the base resin, a lubricant, a solvent, and various additives as necessary on a predetermined portion of the substrate, and then drying. Can be formed. The solvent is not particularly limited. For example, acetates such as ethyl acetate, propyl acetate, and butyl acetate; alcohols such as methanol, ethanol, isopropyl alcohol, and butanol; ketones such as acetone and methyl ethyl ketone; Hydrocarbons; and mixed solvents thereof. The thickness of the topcoat layer 9 is, for example, about 0.5 to 5 μm.

  The glossiness (gross) of the topcoat layer 9 can be appropriately selected in consideration of design properties and the like, but is usually 60 to 150, preferably 80 to 130. The glossiness is a value measured according to JIS K 5600-4-7 (angle 60 °). The glossiness (gloss) of the topcoat layer 9 can be controlled by adjusting the type of lubricant to be used, the average particle diameter, and the amount added.

  In the present invention, the friction coefficient of the outer surface of the top coat layer 9 in the label (static friction coefficient or dynamic friction coefficient, particularly the static friction coefficient) and the matte coating layer 8 from the viewpoint of transportability and slipperiness in the passage in the vending machine. Both the outer surface friction coefficient (static friction coefficient or dynamic friction coefficient, especially the static friction coefficient) is 0.45 or less (for example, 0.15 to 0.45, particularly 0.15 to 0.35, especially with respect to the stainless steel plate). 0.18 to 0.25) is preferred. In particular, a value closer to the coefficient of friction of the outer surface of the top coat layer 9 with respect to the stainless steel plate and the coefficient of friction of the outer surface of the matte coating layer 8 with respect to the stainless steel plate is preferable. For example, the difference between the static friction coefficient of the outer surface of the top coat layer 9 with respect to the stainless steel plate and the static friction coefficient of the matte coating layer 8 with respect to the stainless steel plate is preferably within 0.10, more preferably within 0.07, and particularly preferably. Is within 0.04. In a container (especially a square bottle) with such a label, for example, when it is loaded into a vending machine and sold, the product progresses in the passage to the outlet after it easily slides out of the vending machine installation base. Even if the container outer surface comes into contact with the wall of the passage by moving obliquely with respect to the direction, the container does not stop in the passage due to the friction between the two, and surely comes out to the product outlet. In addition, a static friction coefficient and a dynamic friction coefficient can be measured based on JISK7125.

  The coefficient of friction of the outer surface of the topcoat layer 9 can be controlled by adjusting the type and amount of lubricant, the type of base resin, and the like.

  The container label 4 (shrink label) is formed from a resin as a base material by a known method such as an extrusion method or a calendering method, and then stretched, and a predetermined portion on one or both sides of the obtained base material. In addition, the printing layer 6, the white solid printing layer 7, the matte coating layer 8, and the topcoat layer 9 containing a lubricant can be produced by laminating by a coating method such as printing (for example, gravure printing).

  Stretching can be performed by either a tenter method or a tube method. For example, the stretching treatment is performed at an appropriate temperature in consideration of the glass transition temperature of the resin constituting the base film and the like in the direction [usually the width direction (TD direction)] corresponding to the circumferential direction of the container. It is carried out by stretching about twice, preferably about 4 to 5 times. In addition, if necessary, the stretching process can be performed at a low stretching ratio (for example, about 1.5 times or less) also in a direction [normally the length direction (MD direction)] orthogonal to the above direction. Moreover, after extending | stretching, the heat setting which normally passes a heating zone at about 60-90 degreeC for about 1-10 seconds is performed. The label thus obtained has an orientation in the main stretching direction of the film and exhibits a large heat shrinkability in this direction.

  The container label 4 is further cut into a long strip having a desired width, the matting coating layer 8 and the top coat layer 9 containing the lubricant are faced outward, and the main stretching direction is the circumferential direction. After being rounded into a cylindrical shape, both ends are bonded with an adhesive, heat, solvent, etc., and then cut to a desired length as necessary to be used as a cylindrical shrink label.

  The container label 4 is a full shrink label that covers the entire side surface of the container body 2, a so-called semi-full shrink label that covers all of the body portion and part of the shoulder portion of the side surface of the container body 2 as shown in FIGS. 1 and 2. Any form such as a so-called half-shrink label that covers the upper part of the side surface of the container body 2 (the upper part of the body part and a part of the shoulder part) may be used. A form of a full shrink label or a semi-full shrink label that covers substantially the entire side surface of the main body 2 is preferable.

  The heat shrinkage rate of the container label 4 is not particularly limited. For example, the heat shrinkage rate is 40 to 80%, preferably 50 to 75% in one direction X (direction corresponding to the circumferential direction of the container) when treated with hot water at 90 ° C. for 10 seconds. When the heat shrinkage rate is less than 40%, the shrinkage may be insufficient. Moreover, when the said heat shrinkage rate exceeds 80%, since a distortion arises in a label, it is unpreferable.

  In addition, when using a stretch label or a stretch shrink label as the container label 4, in the example of the above shrink label, the substrate 5 may be a self-stretch film or a film having both a self-stretch property and a heat shrink property. . When an adhesive label or a heat-sensitive label is used as the container label 4, in the example of the shrink label, the outermost surface of the substrate 5 opposite to the matte coating layer 8 and the topcoat layer 9 is used. The pressure-sensitive adhesive label can be obtained by providing a pressure-sensitive adhesive layer or a heat-sensitive adhesive layer on the outer surface. In this case, the base material 5 does not necessarily need to be a plastic film.

  The labeled container of the present invention can be manufactured by covering the container body with the entire circumference of the container body so that the matte coating layer is on the outside. For example, when the container label is a shrink label, the shrink label formed in a cylindrical shape is supplied to an automatic label mounting device, cut into a required length, and then a container (metal) that is normally filled with contents. Cans, PET bottles, etc.) can be manufactured by continuously covering substantially the entire side surface of the container main body or a predetermined part, and by heat-shrinking by heating. The shrinkage of the shrink label fitted to the container body may be performed by any known method, but it passes through a steam tunnel of, for example, about 80 to 100 ° C. because the temperature is evenly transmitted to improve the finish of the label. It is preferable to cause heat shrinkage. When the container label is other than the shrink label, a labeled container can be produced according to a known or conventional method according to the type of the label.

  In the labeled container of the present invention, even if a label having a matte coating layer is attached, the slipperiness of the surface portion other than the matte coating layer of the label is approximated to the slipperiness of the surface of the matte coating layer. Since the outermost surface of the label is made to be uniform, in production lines such as the content filling line, irregular movement and clogging due to contact between the container and the line wall surface are eliminated, and the contents are filled into the container. Products can be manufactured smoothly. In addition, when a product with contents is loaded into a vending machine, clogging due to irregular movement or the like is eliminated in the passage from the loaded site (installation stand) to the product takeout port, and the product is discharged. Performed smoothly.

  The labeled container of the present invention includes, for example, beverages such as tea, coffee, tea, water, soft drinks, carbonated beverages and juices; sakes such as sake and wine; liquid detergents; soy sauce, mirin, noodle soup, oil, etc. It can be used as a container for seasonings.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples. The coefficient of friction (the coefficient of friction with respect to the stainless steel plate on the surface of the top coat layer and the coefficient of friction with respect to the stainless steel plate on the surface of the matte coating layer) was measured by the following method. In addition, in a comparative example, it is the value measured using the base-material (polyester-type film) surface exposed instead of the topcoat layer surface.

(Friction coefficient with respect to stainless steel sheet on top coat layer surface and matte coating layer surface)
About a shrink label, the static friction coefficient and the dynamic friction coefficient were measured with respect to the stainless steel plate (SUS-304) based on JISK7125.

Example 1
Matte coating agent [trade name] on about 1/2 of the surface of one of the polyester films (trade name “S7561”, film thickness 50 μm, manufactured by Toyobo Co., Ltd.) “Fine Wrap PS Matte Medium R”, manufactured by Dainippon Ink & Chemicals, Inc.] so that the average thickness after drying is 2.0 μm, and the remaining half (lower half when attached to a bottle) The top coat agent [trade name “Fine Wrap PS Top Coat Varnish”, manufactured by Dainippon Ink & Chemicals, Inc.] is applied by gravure printing so that the average thickness after drying is 1.2 μm. Thus, a matte coating layer and a topcoat layer were formed. Moreover, the printing layer (ink layer) and the white solid printing layer were formed in the other surface of the said polyester-type film by gravure printing, and the shrink label which has a layer structure as shown in FIG. 3 was prepared. As a result of measuring the friction coefficient of the top coat layer surface and the matte coating layer surface of the shrink label, the friction coefficient of the top coat layer surface with respect to the stainless steel plate is 0.20 for the static friction coefficient and 0.19 for the dynamic friction coefficient, The friction coefficient of the matte coating layer surface to the stainless steel plate was 0.20 for the static friction coefficient and 0.20 for the dynamic friction coefficient.

  This shrink label is rolled into a cylindrical shape so that the width direction of the base film is in the circumferential direction with the surface on the printed layer side inward, and both ends are welded by heat to obtain a continuous tubular shrink label body. It was. This shrink label continuum is supplied to an automatic label mounting device, cut into each label, and then externally fitted into a PET bottle having an internal volume of 500 ml filled with tea and a steam tunnel (temperature 90 ° C.). It was allowed to pass through and thermally contracted to produce a labeled container as shown in FIG. A vending machine manufactured by Sanyo Electric Co., Ltd. is loaded with the tea-filled PET bottle (product) with the shrink label, and the product (100 items) comes out to the product outlet. As a result of the investigation (mounting evaluation), all 100 pieces were discharged to the product outlet.

Comparative Example 1
Except that the topcoat layer was not provided on the surface of the shrink label, the same operation as in Example 1 was performed to produce a shrink label and a labeled container (tea-filled PET bottle). As a result of measuring the friction coefficient on the exposed substrate surface of the shrink label, the friction coefficient of the exposed substrate surface with respect to the stainless steel plate was 0.31 for the static friction coefficient and 0.25 for the dynamic friction coefficient. Further, when mounting evaluation was performed in the same manner as in Example 1, one or more products out of 100 were not discharged to the product takeout port.

It is a perspective view which shows an example of the labeled container of this invention. It is a perspective view which shows the other example of the labeled container of this invention. It is a schematic sectional drawing which shows an example of the label for containers of this invention. It is a schematic sectional drawing which shows the other example of the label for containers of this invention. It is a schematic sectional drawing which shows the further another example of the label for containers of this invention.

Explanation of symbols

1 container with label 2 container body 3 lid (cap)
4 Labels for containers
4a Matte coating layer
4b Top coat layer part 5 Base material 6 Print layer 7 Solid white print layer 8 Matte coating layer 9 Top coat layer
11 Labeled container

Claims (2)

A container label for covering the entire circumference of the container body body, in which a matte coating layer is provided on a part of the surface on the non-contact side with respect to the container, and the topcoat layer containing a lubricant is a container The surface of the non-contact side is provided in a state exposed in a portion other than the portion where the matte coating layer is provided, and the matte coating layer has a base resin and an average particle diameter of 1 to 20 μm. A stainless steel plate on the outer surface of the topcoat layer, wherein the topcoat layer is composed of a base resin and a particulate solid material which is a lubricant having an average particle diameter of 1 to 12 μm. The coefficient of static friction with respect to the surface and the coefficient of static friction with respect to the stainless steel plate on the outer surface of the matte coating layer are both 0.45 or less, and the stainless steel on the outer surface of the topcoat layer A container label , wherein a difference between a coefficient of static friction with respect to a plate and a coefficient of static friction with respect to a stainless steel plate on the outer surface of the matte coating layer is within 0.10 .   A labeled container in which the container label according to claim 1 is mounted so as to cover the entire circumference of the container main body.

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