JP2010241472A - Shrink label and shrink label-attached plastic vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrink label enabling a water droplet to be easily discharged after shrink pressing by steam in a steam tunnel. <P>SOLUTION: The shrink label attached to the outer circumferential surface of a plastic vessel body is composed of at least a base material film layer 10 and a flow passage-forming layer 20 where the flow passage-forming layer forms the inner most layer of the shrink label, and has a recess of a depth not smaller than 4 &mu;m. The surface area of the recess is 5 to 90% of the base material film layer. It is possible to easily discharge liquid such as the water droplet between the plastic vessel and the shrink label. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shrink label and a shrink label-attached plastic container that are used by being attached to an outer peripheral surface of a plastic container, and more particularly, confined between a label and a plastic container during steam processing by a steam tunnel. The present invention relates to a shrink label and a plastic container on which the shrink label is attached.

  Shrink labels are often used as the exterior of plastic containers for soft drinks, milk drinks, energy drinks, seasonings, cosmetics, etc., but when shrink labels are attached to plastic containers and processed by steam in a steam tunnel In some cases, water may enter between the bottle and the label and the liquid droplets may accumulate, causing darkening of the product, or if the liquid droplets remain, mold may occur. Further, when cooling the contents stored in the container, the labeled container may be immersed in water, and in such a case, liquid such as water enters between the container and the label.

  Conventionally, various shrink labels have been developed, and there is a shrink label with a buffering property (Patent Document 1). The label disclosed in Patent Document 1 is a label that is used by being attached to the outer peripheral surface of the body of the container, and the label is composed of at least a base film layer and a tactile sensation imparting layer, The layer coats the resin in a pattern so as to form convex portions. Since the tactile sensation providing layer is coated with a resin pattern so as to form convex portions, the tactile sensation is imparted to the surface of the label, and the heat insulating property can be given sensibly, and is easy to carry. It is said that excellent buffering properties and design properties can also be imparted.

Further, as another function added to the shrink label, there is a function added with heat insulation (Patent Document 2). The label disclosed in Patent Document 2 is a label that is used by being attached to the outer peripheral surface of the body of the container, and the label is composed of at least a base film layer and a heat insulating layer, and the heat insulating layer is A coating material selected from suede-like ink or raised ink containing resin beads is applied to the inner surface of the base film, that is, the surface on the container side in a pattern to form a convex portion. It is a label. A coating material selected from suede-like ink or raised ink containing resin beads is applied in a pattern on the inner surface of the base film, that is, the container-side surface to form a convex portion, and is attached to the outer peripheral surface of the container body As a result, it was said that heat insulation was able to be imparted.
JP 2004-205768 A JP 2004-226468 A

  However, according to the label described in Patent Document 1, although it is excellent in impact resistance by imparting buffering properties, it is not intended for the harmful effects of water droplets after passing through the steam tunnel, and in order to solve the retention of water droplets not enough. The same applies to Patent Document 2. In other words, the labels described in Patent Document 1 and Patent Document 2 have a special printing layer in any one of the labels, such as a raised ink, a foamed ink, or a suede-like ink containing resin beads. This is because the container layer and the label are in close contact with each other, and leakage of contents to the outside of the container is prevented.

  Under such circumstances, when water droplets are trapped between the container and the label, such as when shrinking with a steam tunnel or water immersion for cooling, etc., a label that can easily drain the water droplets Development is desired.

  As a result of examining the plastic container mounting shrink label in detail, the present inventor found that if the flow path forming layer is formed in the innermost layer of the shrink label, even when the shrinkage label is mounted on a conventional plastic container, Easily drain liquids such as trapped water droplets, and such channels can be easily printed on the inside of the base film layer using raised ink, foamed ink, or suede-like ink containing resin beads. The present invention was completed.

  That is, the present invention is a shrink label used by being attached to the outer peripheral surface of a body portion of a plastic container, and is composed of at least a base film layer and a flow path forming layer, and the flow path forming layer is formed of the shrink label. The present invention provides a shrink label comprising an innermost layer, having a recess having a depth of 4 μm or more, and having an area of the recess of 5 to 90% of the base film layer.

  The present invention also provides a shrink label-attached plastic container in which the shrink label is attached to a plastic container.

  Since the shrink label of this invention can be prepared by forming the recessed part of predetermined depth inside a base film layer with a printing technique, it can be manufactured using the conventional printing apparatus.

The shrink label of the present invention is a base film layer provided with a flow path forming layer, and the presence of a staying liquid can be easily detected with the naked eye from the outside.
In the shrink label of the present invention, when the flow path of the contents is formed to communicate with the entire length of the label in the vertical direction, the liquid leaks from the end of the label, thereby preventing darkening and mold. be able to.

  A first aspect of the present invention is a shrink label that is used by being attached to the outer peripheral surface of a body portion of a plastic container, and is composed of at least a base film layer and a flow path forming layer, and the flow path forming layer is formed from the shrink It is a shrink label which comprises the innermost layer of a label, has a recessed part with a depth of 4 micrometers or more, and the said recessed part area is 5-90% of the said base film layer.

  The flow path forming layer can be formed by forming the concave portion in a striped shape in the vertical direction of the label, or by forming the concave portion in an indefinite shape, and the concave portion has a total length in the vertical direction of the label. The through-hole which penetrates a shrink label may be formed in the said recessed part.

  In addition, the flow path forming layer can form a recess by printing a suede-like ink containing raised ink, foamed ink, or resin beads in a pattern on the inside of the base film layer.

In the shrink label of the present invention, a design printing layer may be formed inside the label of the base film layer, and an outer layer may be laminated on the label surface side of the base film layer.
Hereinafter, the shrink label and the shrink label-attached plastic container of the present invention will be described.

(1) Configuration of Shrink Label The shrink label of the present invention has at least a base film layer (10) and a flow path forming layer (20) as shown in FIG. As shown in Fig. 1, the design print layer (30) may be provided inside the label of the base film layer (10), and as shown in Fig. 1 (c), the label of the base film layer (10) You may have an outer layer (40) on the outer side. The “flow path forming layer” in the present invention is the innermost layer of the shrink label having a recess that allows liquid such as water droplets existing between the plastic container and the shrink label to be discharged from the end of the label. In addition, the size described in this specification is the size of the shrink label after heat shrinking.

  In the present invention, as shown in FIG. 2, the flow path forming layer (20) has a recess having a depth (d) of 4 μm or more, preferably 6 to 150 μm, particularly preferably 6 to 60 μm. When the depth is less than 4 μm, it may be difficult to smoothly discharge liquid such as water droplets between the plastic container and the shrink label to the end of the label. Moreover, the area of the said recessed part is 5-90% of the said base film layer, Most preferably, it is 40-70%. Below 5%, after the plastic container is passed through the steam tunnel for shrink processing, the adhesion between the plastic container and the shrink label is strong, and liquid such as water droplets should be discharged sufficiently from the end of the label. May not be possible. On the other hand, even if it exceeds 90%, the recess may be in contact with the plastic container and the flow path may not be formed substantially.

  The shape of the flow path forming layer is not particularly limited, but the concave portion is configured in stripes in the vertical direction of the label, the concave portion is configured indefinitely, the vertical direction of the label, and the left and right Any of those configured symmetrically in the direction may be used.

  FIG. 3A shows a plan view of the flow path forming layer of the shrink label, and FIG. 3B is a cross-sectional view thereof. In the shrink label shown in FIG. 3, since the concave portion is configured in a stripe shape in the vertical direction of the label, the liquid is held in the concave portion of the flow path forming layer (20), and then passes through the flow path (R) to reach the lower end of the label. The contents can be leaked from the department. FIG. 3 shows a shrink label comprising a base film layer (10) and a flow path forming layer (20), but as shown in FIG. 1, between the base film layer and the flow path forming layer. A design printing layer and other layers may be laminated, and an outer layer and other layers may be provided outside the label of the base film layer.

  Note that the vertical stripe-shaped flow path (R) is not limited to the case where it is formed in a straight line in the vertical direction, for example, as shown in FIG. In addition, the liquid may flow out from the lower end of the label through a plurality of flow paths (R).

  Further, even if the recess is formed indefinitely as shown in FIG. 5 (a), as long as the flow path (R) communicates in the vertical direction of the label, it is the same as the shrink label shown in FIGS. Since the liquid leaks from the end of the label, the liquid between the container and the label can be discharged, thereby preventing darkening and mold. FIG. 5B is a cross-sectional view taken along line A-A ′ of FIG.

  On the other hand, as shown in FIG. 6, the case where the recessed part of a flow-path formation layer (20) does not communicate in a label up-down direction may be sufficient. For example, even when liquid is present at the points P and P ′ in FIG. 6A, the liquid can be discharged from the end of the label through the flow path (R). FIG. 6B is a cross-sectional view taken along line A-A ′ of FIG.

  Furthermore, as for the shrink label of this invention, as shown in FIG. 7, the recessed part may have the through-hole which penetrates a shrink label. As shown in FIGS. 7 (a) and 7 (b), if the recess has a through hole, liquid can be discharged from other than the upper and lower ends of the label even when the plastic container equipped with the shrink label of the present invention stands upright. It is possible to prevent mold and darkening regardless of the storage state of the plastic container such as vertically or horizontally. FIG. 7B is a cross-sectional view taken along the line A-A ′ of FIG.

  If such a through-hole exists in a recessed part, as shown, for example in FIG. 8, you may form in a linear form along the cross section of a plastic container, respectively at a label upper end part and a lower end part. FIG. 8B is a cross-sectional view taken along the line A-A ′ of FIG.

  In addition, although the shrink label of this invention is not shown in figure, you may have through-holes, such as a perforation which goes to a lower end from the upper end of a label other than the above-mentioned through-hole. The perforation can easily remove the label.

  If the shrink label of this invention has the above-mentioned flow path formation layer, others can be comprised similarly to the conventional shrink label. Therefore, when the shrink label is bonded in a cylindrical shape and then used by being externally fitted to a plastic container, both ends of the shrink label may form an adhesive layer. In addition, a label-opening tab or notch (cutting start portion) formed by cutting can be provided at the upper end portion of the label. And when the above-mentioned perforation is carved from the said pick piece as a starting point, it can be fractured from the upper part toward the lower part. Moreover, you may provide a knob or a notch also in a lower end part similarly to an upper end part.

The adhesive layer is formed inside the label of the base film layer, and it is not necessary to form the design print layer or the flow path forming layer between the adhesive layer and the base film layer.
The shrink label of this invention does not ask | require an adherend. However, since the shrink label is shrink-processed by steam in the steam tunnel, the effect is excellent when mounted on a plastic container in which shrink processing is generally performed. Such plastic containers include soft drinks, seasonings, liquor (Japanese sake, barley liquor, sparkling liquor, wine, shochu, distilled liquor, etc.), cooking oil, cosmetic containers, toiletries, dehumidifier containers, detergent containers, ampoules Examples thereof include plastic containers such as bottles, energy drinks, eye drop containers, and medicine containers.

(2) Base film layer As the film constituting the base film layer constituting the shrink label, a film that can be shrunk by heat treatment can be widely used. Furthermore, mechanical, physical, chemical strength, printing It is preferable to use a film having suitability. Such a film can be appropriately selected depending on the application of the shrink label. 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, polyester-polystyrene multilayer film, non-woven fabric, etc. formed from resin such as polymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer Laminated film of polyester and shrink film, polyester-polystyrene co-extruded film, 6 nylon film, polyamide film such as 6,6 nylon film, chlorinated polyethylene, chlorinated poly Modified polyolefin film formed as a film of a resin such as pyrene, vinyl chloride - is film formation of a resin-vinyl acetate copolymer film, acrylic resin film or the like can be used.

  The above film is a single layer using one or more kinds of resins constituting it, and using a film forming method such as extrusion method, cast molding method, T-die method, cutting method, inflation method, etc. Film-formed, multi-layered by co-extrusion using two or more types of resin, or formed by mixing two or more types of resin, and the tenter method or tubular method 1 Various resin films formed by stretching in the axial or biaxial direction can be used. A suitable shrink film is a stretched film, which is a uniaxially stretched film in the flow direction. These films may be foamed films.

  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 stretched polyester-polystyrene coextruded film or a foamed polystyrene film, a polyester-polystyrene multilayer film, etc. are suitable. Or a laminated film of a nonwoven fabric and the film may be used. 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 polyester-polystyrene multilayer film, a laminate film of a nonwoven fabric and a shrink film, stretched One or more films selected from the group consisting of polyester-polystyrene coextruded films are preferred. 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 a heat shrink process, a lateral uniaxially stretched film is suitable, whereas the shrink 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.

  On the other hand, in order for the label of the present invention to exert an effect as a shrink label, it is preferable that the thermal shrinkage rate in the stretching direction is 5 to 60%. In addition, the heat shrinkage rate in the present invention is the heat shrinkage rate by boiling water at 100 ° C. when the film is uniaxially stretched with respect to the flow of the base film in the tenter method. The calculation is based on the following formula.

なお、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、１０〜２５０μｍ程度が好ましい。

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 is preferably about 10 to 250 μm.

  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.

(3) Channel Forming Layer In the shrink label of the present invention, there are no restrictions on the material for the channel forming layer and the method for forming the recesses. However, in order to exhibit the characteristics as a shrink label, it is preferable that the flow path forming layer is formed of a coating material such as raised ink, foamed ink, or suede-like ink containing resin beads. This is because, when the concave portion is formed by such a coating material, the flow path can be formed by a printing technique and an existing printing apparatus can be used.

As the flow path forming layer according to the present invention, the coating material can be applied in a pattern on the inner surface of the base film layer, that is, the surface on the container side to form a convex portion.
As a pattern which coats a flow path formation layer on the inner side of a label, it is not limited to the mode illustrated in the above-mentioned FIGS. If it is 90%, there is no particular limitation. Therefore, in addition to the above, it may be a net-like or lattice-like pattern formed evenly in the entire range of the flow path forming layer, a random dot pattern, or the like. Further, a pattern such as a character or a picture over the entire label may be formed by the concave portion. This symbol may be formed by a set of dots, for example. The pitch or the like of the lattice forming this pattern can be changed as appropriate. For example, the size of the dots can be converted to an equivalent circle and the pattern can be composed of 150 to 250 μm. In addition, a recessed part is 4 micrometers or more in depth, More preferably, it is 4-150 micrometers, Most preferably, it is 5-60 micrometers.

  As the raised ink that can be suitably used in the present invention, an ink made of polyvinyl chloride sol, amino alkyd resin, etc., an ultraviolet ray by urethane acrylate, or an electron beam curable ink, polyurethane resin, unsaturated polyester resin, epoxy resin Thus, a material to which a curing agent, a polymerization accelerator or the like is added can be used as necessary. Such a coating method is preferably a printing method having a large ink transfer amount such as gravure printing or silk screen printing, and is preferably printed with a gravure plate having a plate depth of 35 to 80 μm or more.

  In addition, the material of the foamed ink constituting the flow path forming layer in the shrink label of the present invention can be selected from any of natural resins and synthetic resins used for general gravure ink and silk screen ink. For example, binders such as polyurethane resin, acrylic resin, polyamide resin, polyester resin, chlorinated rubber, vinyl chloride / vinyl acetate copolymer, polyvinyl butyral resin, and nitrocellulose can be used.

  The solvent for dissolving the binder is selected depending on the type of the binder and the printing method. For example, a fast-drying solvent is used for gravure printing, and a slow-drying solvent is used for sheet-fed printing such as silk screen printing. Is mainly blended.

  For example, fast-drying solvents include toluene, methyl ethyl ketone, ethyl acetate, ethanol, isopropyl alcohol, and slow-drying solvents include xylol, butyl acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol acetate. From monomethyl ether, ethylene glycol monoethyl ether, methyl isobutyl ketone, butyl alcohol and the like, it can be appropriately selected and used depending on the solubility depending on the type of the binder and the printing means.

Moreover, as a binder of foaming ink, in the case of water solubility, such as a synthetic resin dispersion, methylcellulose, hydroxycellulose, and starch, a solvent can be used as water.
The foaming agent contained in the foamed ink is thermally expandable microspheres in which low-boiling hydrocarbons are microencapsulated with a shell wall of a copolymer such as vinylidene chloride or acrylonitrile by an in situ polymerization method.

  The expansion ratio is 20 to 70 times. The ink containing this has a high expansion ratio of 20 to 70 times (in terms of thickness, 2.7 to 4.1 times) of the expansion agent of the foaming agent. In addition, for example, a pyrolytic foaming agent can be dispersed in a binder solution of foamed ink.

  In the present invention, the base film layer is subjected to a heat shrinking process after being mounted on a plastic container. For this reason, it is preferable that the foamed ink can be foamed under heating conditions when the shrink label is thermally shrunk, and the heat shrink temperature differs depending on the material of the base film used for the shrink label. The range of 50 to 120 ° C is preferable, and the range of 70 to 100 ° C is more preferable.

  When shrink-shrinking a shrink label, in order to achieve foamability under heat-shrinking heating conditions, the foaming agent has a low-boiling hydrocarbon as the core material, and a polyvinylidene chloride copolymer or polyacrylonitrile copolymer. It is preferable to use spherical particles obtained by microencapsulating a coalescence as a wall substance, and the particle size thereof is preferably 5 to 40 μm, more preferably 10 to 30 μm.

  As the low-boiling hydrocarbon of the core material, for example, n-butane, isobutane, cyclopentane, n-pentane, propane and the like can be used. The foaming agent by such a microcapsule can have a maximum expansion ratio of 20 to 70 times with a particle size of 10 to 30 μm, for example.

  Using such a microcapsule foaming agent, for example, when producing ink that is foamed by low-temperature heating for gravure printing, if a large amount of ethyl acetate or methyl ethyl ketone is used as the solvent, the microcapsule may be broken, It is preferable not to use such ester solvents and ketone solvents as much as possible. For this purpose, the binder of the foamable ink can be made into a solution with a solvent such as a mixed system of toluene and isopropyl alcohol (hereinafter referred to as “IPA”), and has an adhesive property to a relatively wide range of resin films. A low-temperature heat-foamable ink for gravure printing can be produced by dispersing the microcapsules in the solution using a good acrylic resin or the like. The thickness of the foamable ink is preferably about 4 to 40 μm.

As the suede-like ink that can be used in the present invention, resin beads are kneaded into a binder to form a concavo-convex shape on the inner side of the label of the base film layer.
As the binder, a resin generally used in a packaging material can be used. For example, a nitrocellulose resin, a polyamide resin, a polyvinyl chloride resin, an acrylic resin, a ketone resin, or the like can be used.

  As the resin beads (matting agent) to be contained in the suede ink, fine particles such as silica, calcium carbonate and barium sulfate, resin fine particles not dissolved in a binder solvent, and the like can be used.

  The average particle diameter of such resin beads is preferably 5 to 50 μm, more preferably about 30 μm. When the average particle diameter of the resin beads is within the above range, the concave portion having the above depth can be easily formed, and a flow path can be formed. When the average particle diameter of the resin beads is less than 5 μm, the depth of the recess may be 5 μm, and it may be difficult to form the recess.

  Further, the addition amount of the matting agent in which the resin beads are dispersed in the binder is preferably about 10 to 20% by mass, and more preferably about 17% by mass. When the amount of the matting agent is within the above range, coating can be easily performed.

  Moreover, as a method for coating such suede-like ink, a printing method having a large amount of ink transfer such as gravure printing and silk screen printing is preferable. By printing using a gravure plate having a plate depth of about 5 to 60 μm, a flow path forming layer can be prepared by coating with an ink film thickness of about 10 to 30 μm.

  In addition, although the said flow-path formation layer can be performed by the normal printing method using the said ink, it can also form the pattern by a color by using a multi-color (9-11 colors) gravure printing machine etc. .

  The shrink label of this invention may have a through-hole in the recessed part of a flow-path formation layer. As shown in FIG. 7, if the concave portion has a through hole, liquid such as water droplets held between the plastic container and the shrink label can be leaked to the outside from the through hole. Therefore, the size of the through-hole can be appropriately selected for the purpose of allowing liquid such as water droplets to flow out of the label.

  Moreover, the through-hole should just be provided in the said at least 1 recessed part of a shrink label, and it is not necessary for the through-hole to be provided in all the recessed parts. The number of recesses is not particularly limited, and through holes may be provided in places other than the recesses. Therefore, as shown in FIG. 8, through holes may be formed in the vicinity of the upper end or the lower end of the label, or in the form of perforations, and when the through holes are provided in a line shape such as perforations. It is not limited, You may form a through-hole in arbitrary places. From the viewpoint of operability, it is convenient to form the through hole by a perforation.

(4) Design Print Layer In the shrink label of the present invention, a design print layer may be laminated between the base film layer and the flow path forming layer. Moreover, in this invention, although a printing layer may be formed over the full length of a shrink label, you may form only an adhesive bond layer without providing a design printing layer in an adhesion part at both ends of a label.

  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 differs depending on the solvent. The main solvents used for 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.

(5) Outer layer The shrink label of this invention may provide an outer layer further on the surface side of the said base film layer. As such an outer layer, it can be appropriately selected depending on the use and design properties of the shrink label. When the label surface is given slipperiness, the OP varnish is used, and when the touch feeling is given 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.

(6) Surface Treatment In the present invention, prior to the formation of any layer of the shrink 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.

(7) Adhesive layer In the present invention, an adhesive layer can be formed on both ends of the label. As the adhesive layer, a solvent, an adhesive, or the like conventionally used for shrink labels can be used.

  The solvent is not particularly limited, and examples thereof include hydrocarbons such as cyclohexane, pentane, hexane, benzene and toluene, ethers such as tetrahydrofuran (THF), dioxolane, diethyl ether and diisopropyl ether, acetone, methyl ethyl ketone, cyclohexanone and the like. Organic solvents such as ketones, esters such as methyl acetate, ethyl acetate, and butyl acetate can be used. In the case of films laminated with polyester resins, polystyrene resins, and amorphous polyolefin resins, ether solvents such as tetrahydrofuran, dioxane, dioxolane, halogenated hydrocarbon solvents such as methylene chloride, cyclohexane, methylcyclohexane Aliphatic hydrocarbon solvents such as acetone, ketone solvents such as acetone, methyl ethyl ketone, and methyl isobutyl ketone, ester solvents such as ethyl acetate and methyl acetate, aliphatic hydrocarbon solvents such as hexane, and aromatic carbonization such as toluene Examples thereof include organic solvents such as one type of hydrogen-based solvent or a mixed solvent of two or more types. Bonding with a solvent is preferable because the thickness of the bonded portion can be reduced and heat shrinkage is not hindered.

  On the other hand, it can also be bonded using a hot melt adhesive. In the present invention, the thermoplastic resin of the hot melt adhesive is the base of the pressure-sensitive adhesive, and is compatible with the plasticizer, thereby obtaining cohesive force during use. For example, acrylic acid esters such as methyl acrylate, ethyl acrylate, acrylic acid-isopropylene, isobutyl acrylate, n-butyl acrylate, amyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, and methacrylic acid esters , Acrylic acid ester copolymers such as copolymer resins made of unsaturated carboxylic acids such as acrylic acid and maleic acid, styrene-acrylic acid esters, styrene-butadiene and the like. Among these, the self-crosslinking acrylic ester copolymer is suitable for the shrink label of the present invention because it has a property of improving water resistance upon heating.

  In the present invention, the solid plasticizer of the hot melt adhesive does not give plasticity to the resin below the melting point, is in a crystalline state, melts by heating and is compatible with the resin, and swells or softens the resin. It becomes a non-adhesive anti-blocking agent at room temperature and has a function of becoming adhesive when heated. For example, diphenyl phthalate, dihexyl phthalate, dicyclohexyl phthalate, dihydroabiethyl phthalate, dimethyl isophthalate, sucrose benzoate, ethylene glycol dibenzoate, trimethylol ethane tribenzoate, glyceride tribenzoate, And tetrabenzoic acid pentaerythritol, octaacetic acid sucrose, tricyclohexyl citrate, and N-cyclohexyl-p-toluenesulfonamide. Those having a melting point of about 50 to 100 ° C. can be preferably used. If the melting point is 50 ° C. or lower, the adhesive may be activated during storage of the label, and storage and transportation before use become severe, which is not preferable. On the other hand, when the melting point is 100 ° C. or higher, the efficiency for activating the adhesive layer of the label deteriorates, which is not preferable.

  In the present invention, the tackifier of the hot melt adhesive improves the adhesive performance of the adhesive. For example, terpene resin, aliphatic petroleum resin, aromatic petroleum resin, coumarone-indene resin, styrene resin, phenol resin, terpene-phenol resin, rosin derivative (rosin, polymerized rosin, hydrogenated rosin and their glycerin, penta And esters with erythritol, resin acid dimers, etc.).

  The solid plasticizer, thermoplastic resin and tackifier are an emulsion in which thermoplastic resin particles (solid particles or droplets) are emulsified and dispersed in water, or the thermoplastic resin is dissolved or dispersed in an organic solvent. These can be used alone or in a mixture of two or more. Moreover, a dispersing agent, an antifoamer, a thickener etc. can also be used as needed.

(8) Shrink Label Manufacturing Method When the shrink label of the present invention has a design print layer inside the label of the base film layer, as shown in FIG. The forming layer may be printed inline. As a result, production can be performed efficiently. In addition, as shown in FIG.1 (c), when it has an outer layer on the label outer side of a base film layer, after forming a design printing layer and a channel formation layer in the base film layer beforehand, it is reversed, for example, It can be formed by printing with a transparent varnish such as nitrified cotton, polyurethane resin, polyamide resin, acrylic resin, or a mixture of two or more of these. For such an outer layer, 0.5 to 5 μm is sufficient.

  In addition, in order to provide a through-hole in the recess or to perforate the label for opening the label, for example, a method of forming by cutting to a predetermined depth in the thickness direction of the shrink label using a laser beam Further, it can be performed by a method of pressing and forming a disc-shaped blade having a cut portion and a non-cut portion repeatedly formed around it. The through holes and perforations can be formed at an appropriate stage in the process of manufacturing the label. In the case of engraving for opening the label, two vertical perforations may be provided starting from the separation start portion, and the label can be easily broken by the perforations. In addition, the perforation is not limited to two, but it is also possible to provide one or three or more.

  In order to form an adhesive layer on both ends of the label, there are a roll coater method using an direct roll or a gravure roll, an extrusion coater method, a slit orifice coater method, etc., and any coating method can be used in the present invention. The solvent may be removed after dissolving and coating in the solvent. For example, in order to form an adhesive layer on both ends of a shrink label, the adhesive film coater or adhesive applicator is used to adhere to a laminated film in which a design printing layer, a flow path forming layer and an outer layer are previously formed on a base film layer. A method of applying the agent can be employed.

  In the present invention, the adhesive layer may be formed by cutting the shrink label raw roll into a predetermined size and then forming the adhesive layer, or after forming the adhesive layer and cutting into a predetermined size.

(9) Plastic container There is no restriction | limiting in particular as a container which can attach the shrink label of this invention, What is necessary is just a resin which can be adhere | attached with the said adhesive agent. For example, a polyester resin is used as the thermoplastic resin layer constituting the container because it is lightweight and has excellent mechanical strength, heat resistance, gas barrier properties, chemical resistance, aroma retention, hygiene, etc. preferable. 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.

  The shape of the plastic container may be a polygon such as a square or an octagon. Moreover, it is not limited to when it is the same diameter over the full length of a trunk | drum, For example, a gourd type | mold etc. may be sufficient besides the trunk | drum vertical cross section of a container being a square. More preferably, it is a plastic container having a depression at the center of the container as shown in FIGS. Such a depression in the center is a container including a heat sterilization process typified by Japanese tea, Chinese tea, etc., and a depression is formed in the center so as to absorb temperature changes during heating. When such a dent exists, since there are few contact | adherence parts between a label and a plastic container, it becomes easy to discharge | emit the water drop etc. which exist in the meantime from a label edge part. On the other hand, for example, a carbonated beverage does not form a depression in the central portion of the plastic container because no heat treatment is performed. For this reason, there is much adhesion area of a shrink label and a plastic container. However, since the shrink label of the present invention has the flow path forming layer described above, even a container having a small gap between the label and the container, such as a carbonated beverage, adheres after passing through the steam tunnel. Water droplets can be discharged efficiently.

(10) Shrink label-attached plastic container In the present invention, for example, the shrink label is attached to a plastic container through adhesive layers on both ends of the shrink label, and attached to a plastic container, and then the label is thermally contracted. A mounting plastic container can be manufactured. The shrink label of the present invention is characterized in that it has a flow path forming layer, and the others are in common with the conventional shrink label. Therefore, the shrink label-attached plastic container is manufactured using the conventional label sticking apparatus. Can do.

  The shrink label-attached plastic container of the present invention has a thickness constituted by the uneven portions of the flow path forming layer as compared with the conventional shrink label, so that liquid such as water droplets can be discharged out of the label and the plastic container is protected. There is. Adhesion of water droplets and the like can be confirmed visually.

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
A uniaxially stretched polyethylene terephthalate resin film (product name “S7542” manufactured by Toyobo Co., Ltd.) having a thickness of 45 μm was prepared as a base film. On the back of the uniaxially stretched polyethylene terephthalate resin film, the gravure printing ink is used in places other than the adhesive layers at both ends, and a predetermined printing consisting of letters, symbols, figures, patterns, etc. is printed on the back using the gravure printing method. A design print layer was formed by printing.

  Next, suede-like ink in which acrylic resin beads having an average particle size of about 20 μm are dispersed in a binder made of acrylic resin (manufactured by Dainichi Seika Co., Ltd., product name “OS-M suede OP varnish”, additive: VYS, suede DP additive) is applied onto the design print layer by gravure coating with a plate depth of 60 μm so that the recess depth is 12 μm and the recess area is 30% of the design print layer. Formed.

Subsequently, the film was inverted, and an OP varnish layer having a thickness of 3 μm was formed on the outside of the label of the base film layer.
The obtained wide printing film was slit into four rows, and at the same time, two perforations were placed at 12 mm intervals with a sewing blade between the 1 mm hole and the 1 mm connecting pitch. Thereafter, dioxolane was applied and both ends of the label were bonded together in a cylindrical shape to prepare a label having a diameter of 114 mm.

  The obtained roll-shaped label was mounted on a label applicator, cut with a rotary cutter at a pitch of 160 mm, and at the same time, holes were made at a pitch of 1 mm holes and 1 mm connecting at positions 20 mm from the top and 20 mm from the bottom. Next, the label is externally fitted into a cylindrical plastic container having a capacity of 500 ml and six oblong depressions formed in the center of the container, as shown in FIG. Prepared.

A concave portion having a depth of 12 μm and an area 30% of the design printing layer was formed in the flow path forming layer of the label attached to the plastic container.

Example 2
A plastic container with a shrink label was prepared in the same manner as in Example 1 except that the flow path forming layer was coated so that the recessed area was 60% of the design print layer.

A concave portion having a depth of 9 μm and an area 60% of the design print layer was formed in the flow path forming layer of the label attached to the plastic container.

Example 3
A plastic container with a shrink label was prepared in the same manner as in Example 1 except that the flow path forming layer was coated so that the recessed area was 90% of the design print layer.

A concave portion having a depth of 4 μm and an area of 90% of the design printing layer was formed in the flow path forming layer of the label attached to the plastic container.

Example 4
As the base film, a heat-shrinkable film having a thickness of 40 μm (manufactured by Mitsubishi Plastics Co., Ltd., product name “DL301s”, polyethylene terephthalate resin / polystyrene resin coextruded multilayer film) was prepared.

  On the back side of the laminated film, gravure printing ink is used in places other than the adhesive layers at both ends, and a predetermined print consisting of letters, symbols, figures, designs, etc. is printed on the back surface by a gravure printing method, and design printing is performed. A layer was formed.

  Next, a urethane resin-based uplifting ink (product name “KKB Cure U Matte Medium”, manufactured by Dainichi Seika Co., Ltd.) is formed on the design printing layer by a gravure coating with a recess depth of 12 μm and a recess area. The flow path forming layer was formed by coating so as to be 30% of the design print layer.

  The obtained wide printing film was slit into four rows, and at the same time, two perforations were placed at 12 mm intervals with a sewing blade between the 1 mm hole and the 1 mm connecting pitch. Then, tetrahydrofuran (THF) was applied and the both ends of the label were bonded together in a cylindrical shape to prepare a label having a diameter of 114 mm.

  The obtained roll-shaped label was mounted on a label applicator, cut with a rotary cutter at a pitch of 160 mm, and at the same time, holes were made at a pitch of 1 mm holes and 1 mm connecting at positions 20 mm from the top and 20 mm from the bottom. Next, the label is externally fitted into a cylindrical plastic container having a capacity of 500 ml and six oblong depressions formed in the center of the container, as shown in FIG. Prepared.

A concave portion having a depth of 12 μm and an area 30% of the design printing layer was formed in the flow path forming layer of the label attached to the plastic container.

Example 5
A plastic container with a shrink label was prepared in the same manner as in Example 4 except that the flow path forming layer was coated so that the recessed area was 60% of the design print layer.

A concave portion having a depth of 9 μm and an area 60% of the design print layer was formed in the flow path forming layer of the label attached to the plastic container.

Example 6
A plastic container with a shrink label was prepared in the same manner as in Example 4 except that the flow path forming layer was coated so that the recessed area was 90% of the design print layer.

A concave portion having a depth of 4 μm and an area 60% of the design print layer was formed in the flow path forming layer of the label attached to the plastic container.

Comparative Example 1
A uniaxially stretched polyethylene terephthalate resin film (product name “S7542” manufactured by Toyobo Co., Ltd.) having a thickness of 45 μm was prepared as a base film. On the back of the uniaxially stretched polyethylene terephthalate resin film, the gravure printing ink is used in places other than the adhesive layers at both ends, and a predetermined printing consisting of letters, symbols, figures, patterns, etc. is printed on the back using the gravure printing method. A design print layer was formed by printing.

Subsequently, the film was inverted, and an OP varnish layer having a thickness of 3 μm was formed on the outside of the label of the base film layer.
The obtained wide printing film was slit into four rows, and at the same time, two perforations were placed at 12 mm intervals with a sewing blade between the 1 mm hole and the 1 mm connecting pitch. Thereafter, siloxane was applied and both ends of the label were bonded together in a cylindrical shape to produce a label having a diameter of 114 mm.

The obtained roll-shaped label was mounted on a label applicator, cut with a rotary cutter at a pitch of 160 mm, and at the same time, holes were made at a pitch of 1 mm holes and 1 mm connecting at positions 20 mm from the top and 20 mm from the bottom. Next, the label is externally fitted into a cylindrical plastic container having a capacity of 500 ml and six oblong depressions formed in the center of the container, as shown in FIG. Prepared.

Comparative Example 2
A heat-shrinkable film of 45 μm in thickness (product name “DL301s”, polyethylene terephthalate resin / polystyrene resin coextruded multilayer film) having a thickness of 45 μm was prepared as the base film.

  On the back side of the laminated film, gravure printing ink is used in places other than the adhesive layers at both ends, and a predetermined print consisting of letters, symbols, figures, designs, etc. is printed on the back surface by a gravure printing method, and design printing is performed. A layer was formed.

  The obtained wide printing film was slit into four rows, and at the same time, two perforations were placed at 12 mm intervals with a sewing blade between the 1 mm hole and the 1 mm connecting pitch. Thereafter, dioxolane was applied and both ends of the label were bonded together in a cylindrical shape to prepare a label having a diameter of 114 mm.

The obtained roll-shaped label was mounted on a label applicator, cut with a rotary cutter at a pitch of 160 mm, and at the same time, holes were made at a pitch of 1 mm holes and 1 mm connecting at positions 20 mm from the top and 20 mm from the bottom. Next, the label is externally fitted into a cylindrical plastic container having a capacity of 500 ml and six oblong depressions formed in the center of the container, as shown in FIG. Prepared.

Experiment After each of the 24 shrink-labeled plastic containers obtained in Examples 1 to 6 and Comparative Examples 1 and 2 was shrunk in a steam tunnel, the water droplets on the surface were wiped off, and after 5 minutes each of the Examples or Comparative Examples Twenty-four shrink-labeled plastic containers were placed in cardboards, the lids were closed, and the containers were stored in an environment of 15 ° C. and 60%. The number of days until the water drops between the labels and the containers disappeared over time and the appearance of the containers were confirmed. The results are shown in Table 1.

In the table, “◎” indicates that there is no water droplet, “◯” indicates that the water mark remains thin, and “Δ” indicates that the water mark remains.

  The shrink label according to the present invention can be manufactured using a conventional shrink label manufacturing apparatus, and the plastic container equipped with the label can easily discharge water drops after the shrink processing by steam of the steam tunnel, It can prevent darkening and is useful.

1A to 1C are cross-sectional views illustrating the layer structure of a shrink label used in the present invention. It is a figure explaining the recessed part in the flow-path shaping | molding layer of the shrink label of this invention. It is a figure explaining that a recessed part is formed in the vertical stripe form in the flow-path molding layer of the shrink label of this invention. In the flow path molding layer of the shrink label of this invention, it is a figure which shows the other aspect by which a recessed part is formed in the shape of a vertical stripe. It is a figure explaining that a recessed part is formed in an indefinite shape in the flow path molding layer of the shrink label of this invention. In the flow path molding layer of the shrink label of this invention, it is a figure explaining the state which a recessed part does not communicate over a label upper and lower sides. In the shrink label of FIG. 6, it is a figure explaining the state by which the through-hole is provided in the recessed part of the flow-path shaping | molding layer. In the shrink label of FIG. 5, it is a figure explaining the state by which the through-hole is provided in the recessed part of a flow-path shaping | molding layer, and is a figure which shows the state in which the perforation is formed in the label upper end and lower end. It is a side view of a plastic container suitable for mounting the shrink label of the present invention. It is a side view of a plastic container suitable for mounting the shrink label of the present invention.

10 ... base film layer,
20 ... flow path forming layer,
30 ... Design printing layer,
40 ... outer layer,
R: Flow path.

Claims (10)

A shrink label used by attaching to the outer peripheral surface of the body of a plastic container,
It is composed of at least a base film layer and a flow path forming layer,
The flow path forming layer constitutes the innermost layer of the shrink label, has a recess having a depth of 4 μm or more, and the area of the recess is 5 to 90% of the base film layer. label.   The shrink label according to claim 1, wherein the flow path forming layer is configured such that the concave portion is formed in a stripe shape in the vertical direction of the label.   The shrink label according to claim 1, wherein the flow path forming layer is formed by forming the concave portion in an indefinite shape.   4. The shrink label according to claim 1, wherein the recess communicates with the entire length in the vertical direction of the label.   The shrink label according to claim 1, wherein the recess has a through-hole penetrating the shrink label.   The said flow path formation layer prints the suede-like ink containing raised ink, foaming ink, or resin bead in the shape of a pattern inside a base film layer, and forms a recessed part. A shrink label according to any of the above.   The base film layer is 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 polyester-polystyrene multilayer film, a laminate of a nonwoven fabric and a shrink film. The shrink label according to any one of claims 1 to 6, which is at least one film selected from the group consisting of a film and a stretched polyester-polystyrene coextruded film.   Furthermore, the design printing layer is formed in the label inner side of a base film layer, The shrink label in any one of Claims 1-7 characterized by the above-mentioned.   The shrink label according to any one of claims 1 to 8, wherein the base film layer further has an outer layer laminated on the label surface side of the base film layer.   The shrink label mounting plastic container in which the shrink label in any one of Claims 1-9 was mounted in the plastic container.

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