JP2011128249A - Roll shrink label, container with roll shrink label, and manufacturing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roll shrink label which is finely attached to a container without wrinkles, peeling, or displacement of the label even when a hot-melt type adhesive is used and when the label is shrunk by heating and which has good fit between the label and the container; and also to provide a container with the roll shrink label, and a method for manufacturing a container with the roll shrink label, with a high efficiency and at a low cost. <P>SOLUTION: The roll shrink label is composed of: a film layer 10 having a 5% to 25% shrinkage, after being immersed into hot water of 100°C for 10 seconds, in the body circumference direction, and a -5% to 5% shrinkage in the direction orthogonal to the body circumference direction; and an adhesive layer 20 of a hot-melt type adhesive provided at both ends of the roll shrink label 1 in the body circumference direction. The film layer 10 is a stretched polyolefin film having a 10% to 15% shrinkage in the body circumference direction, and 20 μm to 100 μm thickness, and the adhesive layer 20 has a 5 μm to 100 μm thickness. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a roll shrink label that is wound around and mounted on the outer peripheral surface of a body portion of a container. More specifically, a hot melt adhesive is used to generate wrinkles, remove a label, and apply a label even after a heat shrink process. The present invention relates to a roll shrink label, a container with a roll shrink label, and a method for manufacturing the same.

  In the present specification, “ratio”, “part”, “%” and the like indicating the composition are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated. “PET” is an abbreviation, functional expression, common name, or industry term for “polyethylene terephthalate” and “UV” for “ultraviolet rays”.

(Background Art) Conventionally, plastic bottle containers such as PET have excellent properties such as transparency, mechanical strength, calorific value at the time of combustion, etc., so that they contain soft drinks, liquid seasonings, cosmetics, etc. There is a method in which a heat-shrink process is performed by externally attaching and attaching a label, which is frequently used for the purpose of displaying contents, to the container. However, a container formed by fitting a cylindrical label on the container intermittently performs the process of covering the label material, so that the operation rate decreases, or when the label material is covered, a shift occurs and the container is placed in a suitable location. There were drawbacks such as not being able to display the label accurately. On the other hand, it is convenient if the shrink label can be directly attached to the container without forming a cylindrical label in advance. However, the adhesive method using cold glue adhesive such as casein glue or sticky label is a method of sticking to glass bottles such as beer bottles, and the adhesive sticks out and floats easily. To do. In addition, there is a method using an adhesive label, but the cost increases due to the use of release paper. Instead of fitting the cylindrical label to the container, the label is adhered to the container end with an adhesive, and the other end of the label is wound on the container after the remaining label is wound on the container. There is also a fixing technique. However, it is difficult to peel off the label after use, and the use of an adhesive with weak adhesive strength to enhance the peelability of the label may cause the polymerized part of the label to be carelessly peeled off during the distribution process of the product. There was a point.
Therefore, the roll shrink label and the container with the roll shrink label are bonded with a hot melt agent, or even when shrinking due to heating (shrink), the label is wrinkled, the label is detached, and the label is bonded. There is a demand for a good fit with no deviation.
Further, when the roll label is applied to a bottle with a panel, there is no fit between the label and the bottle, but it is also required that a fit between the bottle and the label can be imparted. In addition, the cylinder-attached shrink label requires a certain amount of stiffness in order to stably insert it into the bottle and prevent misalignment, making it impossible to reduce the thickness of the film and reducing the thickness of the shrink label film layer. Yes. On the other hand, the manufacturing method of a container with a roll shrink label requires a special welding apparatus for welding when a UV hot melt adhesive is used, and is required to be used as a line for a wound label. In addition, a cylinder-attached shrink label requires a process for forming a cylinder in advance, and there is also a need for a highly efficient manufacturing method that does not require a cylinder application process and has few processes.
Furthermore, the cylinder-attached shrink label can be operated only at a low speed for stable insertion into the bottle and prevention of positional displacement, and a low-cost manufacturing method is also required by increasing the manufacturing method (also referred to as labeling).

JP 2003-205946 A JP 2006-117269-A JP 2000-242179 A JP 2008-145498 A

(Prior Art) Conventionally, as a method of attaching a label that has been bonded in a cylindrical shape in advance to the container and attaching the label over the entire circumference to the container, the bottle body using the self-stretching or self-recovering property of the film This is a stretch label that is attached to the outer peripheral surface of the bottle body and attached to the outer peripheral surface of the bottle body part that constitutes a bottle for filling soft drinks such as tea, and prevents the bottle body part from falling off from the outer peripheral surface. An adhesive layer is formed, and a corona discharge treatment surface is formed on the end of the label surface to form a corona discharge treatment surface, and the adhesive layer and the corona discharge treatment surface are opposed to form a joint portion, A cylindrical stretch label that is attached in close contact with the outer peripheral surface of the bottle body is known (for example, see Patent Document 1). However, a container formed by fitting a cylindrical label on the container intermittently performs the process of covering the label material, so that the operation rate decreases, or when the label material is covered, a shift occurs and the container is placed in a suitable location. There is a drawback that the label is not displayed correctly.
In addition, after the cylindrical label is externally fitted around the outer periphery of the container, heat treatment is performed to form a shrink, and a cylindrical shrink label that covers the surface continuously from the bottom of the mouth of the container to the bottom is externally fitted, and then heat shrink treatment A technique for performing is known (see, for example, Patent Document 2). However, there is a problem in that there is an extra step of pasting a hot melt adhesive on both ends of the shrink label in advance and pasting the label into a cylindrical shape via the hot melt adhesive.
Furthermore, instead of the method of fitting the cylindrical label to the container, the label is adhered to the container end portion with an adhesive, and the other end portion is attached to the container via the adhesive after the remaining label portion is wound around the container. A fixing technique is known (see, for example, Patent Document 3). However, a difficult-to-adhere layer having adhesiveness to the adhesive on the back side of the label and having peelability to the cured adhesive is formed, and a container adhesive layer having adhesiveness is further formed on the hardly-adhesive layer. It is a label that is attached to both ends of a label in a state where the container adhesive layer is laminated and adhered to the peripheral surface of the container and the label back surface is temporarily adhered, and the label is easily removed after use. .
Furthermore, the applicant consists of a base film layer 10 and an adhesive layer 20 provided at least at both ends of the label, and the adhesive layer is a UV hot melt adhesive and / or a UV adhesive, A roll shrink label that can be manufactured with high productivity and can be manufactured by winding around the outer peripheral surface of the body portion of the container is disclosed (for example, see Patent Document 4). However, since a base film including a high stretch that has a thermal shrinkage rate of 5 to 85% with hot water at 100 ° C. in the stretching direction is used and a UV hot melt adhesive or a UV adhesive is used, an expensive UV adhesive is used. There is a problem that a layer and a special apparatus such as a UV tunnel or a laser welding apparatus for curing the layer are required.

  Therefore, the present invention has a shrinkage rate of 5% to 25% in the outer periphery direction of the trunk after being immersed in hot water at 100 ° C. for 10 seconds as a film layer, and a shrinkage rate in the direction perpendicular to the outer periphery of the trunk is − Even if it adheres using a 5% to 5% film layer and a conventional hot-melt adhesive for wound labels, wrinkles are generated on the label even when it is shrunk (shrinking), and the label is detached. In order to complete a roll shrink label and a container with a roll shrink label, the present inventors have advanced earnestly research and have arrived at the present invention. Is. In addition, the manufacturing method of a container with a roll shrink label uses a hot melt adhesive and can also be used as a line for a wound label. Thus, the present invention is a highly efficient and low-cost manufacturing method.

In order to solve the above-mentioned problems, a roll shrink label according to the invention of claim 1 of the present invention is a roll shrink label that is wound around and mounted on the outer peripheral surface of a body of a container, and includes a film layer and at least the roll shrink label. It consists of an adhesive layer provided at both ends in the outer peripheral direction of the body of the label, and the shrinkage in the outer periphery of the body after the film layer is immersed in hot water at 100 ° C. for 10 seconds is 5% to 25%. Thus, the shrinkage rate in the direction perpendicular to the outer peripheral direction of the body portion is -5% to 5%, and the adhesive layer is a hot-melt adhesive layer.
The roll shrink label according to the invention of claim 2 has a thickness of 20 μm to 100 μm with a shrinkage rate of 10% to 15% in the outer peripheral direction of the body after the film layer is immersed in hot water at 100 ° C. for 10 seconds. It is a stretched polyolefin film, and the adhesive layer is a hot melt adhesive layer having a thickness of 5 μm to 100 μm.
The roll shrink label according to the invention of claim 3 is such that the film layer is composed of a plurality of layers, and at least one layer has easy cutability in the outer peripheral direction of the body portion.
The roll shrink label according to the invention of claim 4 is such that the adhesive layer is formed such that the film layer is supplied to a labeler in a roll state and applied on the labeler machine.
The roll shrink label according to the invention of claim 5 is formed by providing one or a plurality of perforations in a direction perpendicular to the outer peripheral direction of the body portion of the roll shrink label.
A container with a roll shrink label according to the invention of claim 6 is such that the roll shrink label according to any one of claims 1 to 5 is mounted on the container and subjected to heat shrink treatment.
The manufacturing method of the container with a roll shrink label concerning invention of Claim 7 is a manufacturing method of the container with a roll shrink label of Claim 6, Comprising: (1) Roll in any one of Claims 1-4 It is a label preparation step for preparing a film layer 10 of a shrink label, and (2) a cutting step for cutting the film layer 10 of the roll shrink label 1 into a desired dimension. (3) Adhesive layer forming step of forming a hot melt adhesive layer on the start and end portions of the roll shrink label on the label container side, (4) A winding step of winding and adhering the roll shrink label around the outer periphery of the container, 5) The container to which the roll shrink label is fixed is heated so that the shrink process is performed to shrink the roll shrink label.
The method for producing a container with a roll shrink label according to the invention of claim 8 is the method for producing a container with a roll shrink label according to claim 7, further comprising at least a direction perpendicular to the outer circumferential direction of the roll shrink label. And a perforation process for providing a perforation.

According to the first aspect of the present invention, the thin film layer is used, and the label is wrinkled on the label even when it is adhered using a hot-melt adhesive for a conventional wound label, or even when shrinking (shrinking) by heating. There is no generation, no detachment of the label, and no misalignment of the bonded portion of the label.
According to the second aspect of the present invention, in addition to the effect of the first aspect, there is an effect that the label can be stably mounted without generation of wrinkles on the label, detachment of the label, and displacement of the bonded portion of the label. Play.
According to the present invention of claim 3, there is an effect that it can be easily cut and removed even at the time of disposal after use.
According to this invention of Claim 4, since an adhesive bond layer can be apply | coated on a labeler machine using only a film layer, there exists an effect which is more efficient.
According to the present invention of claim 5, there is an effect that it can be easily peeled off and removed even when discarded after use.
According to the present invention of claim 6, even when the thin film layer is bonded to the hot melt adhesive, even when shrinking due to heating (shrinking), the label is wrinkled, the label is detached, the label There is no gap between the bonded parts and it can be installed well, and it has the effect of excellent fit between the bottle and the label.
According to the present invention of claim 7, even if a hot melt adhesive is used, it can also be used as a label line for a wound label. Since it can be operated at high speed, it has the effect of high efficiency and low cost.
According to the present invention of claim 8, there is an effect that it can be easily peeled off and removed even when discarded after use.

It is a cross-sectional view which shows one Example of the roll shrink label of this invention. It is explanatory drawing of the principal part explaining the labeler which uses the roll shrink label of this invention. It is explanatory drawing explaining the adhesive agent application mechanism of FIG. It is sectional drawing explaining the container which can be used with the roll shrink label of this invention. It is sectional drawing which shows the state which affixed and rolled and fixed the roll shrink label of this invention to the container shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (Roll Shrink Label) The present invention is a roll shrink label 1 that is wound around and attached to the outer peripheral surface of the body of the container 190, and is provided at both ends of the film layer 10 and at least the outer periphery of the roll shrink label. And an adhesive layer 20. After the film layer 10 is immersed in hot water at 100 ° C. for 10 seconds, the shrinkage rate in the outer peripheral direction of the body portion is 5% to 25%, and the shrinkage rate in the direction perpendicular to the outer periphery direction of the body portion is −5% to 5%. Let's say. The adhesive layer 20 is a hot-melt adhesive layer. FIG. 1 shows a preferred embodiment of the roll shrink label 1 of the present invention. The roll shrink label 1 has a sticking part (W) for attaching to the container 190. FIG. 1 (a) includes a film layer 10 and an adhesive layer 20, and the adhesive layer 20 is formed only inside the label of the film layer 10 to form a sticking portion (W), and one of the sticking portions (W). Is the starting end and the other is the end. Moreover, the aspect which has the design printing layer 30 is shown in FIG.1 (b). In FIG.1 (b), the printing layer is not provided in the sticking part (W), but it has become the aspect by which the adhesive bond layer 20 is formed in the container side of the roll shrink label 1 of the film layer 10. FIG. FIG.1 (c) shows the aspect which has the outer layer 40 further on the label surface of the film layer (10) of the roll shrink label of FIG.1 (b). The film layer 10 is not limited to a single layer, and may be a laminated film having two or more layers. The size of the roll shrink label 1 can be appropriately selected according to the size of the container 190 to be mounted. Similarly, the size of the affixing part to which the adhesive is applied can be appropriately selected according to the usage mode of the label applicator, for example.

  The roll shrink label 1 is provided with an adhesive layer 20 at least at the start end and the end of the roll shrink label 1 on the container 190 side to form a hot-melt adhesive layer. The adhesive layer 20 is a roll The shrink label 1 is not limited to the start end and the end end. Therefore, the adhesive layer 20 may be formed on the entire inner surface of the roll shrink label 1, or the adhesive layer 20 may be formed in a frame shape over the entire inner periphery of the roll shrink label 1. Furthermore, the circumference of the trunk is not the same across the top and bottom of the container, and there is a case where there is a difference between the maximum circumference and the minimum circumference. The adhesive layer at the start end and the adhesive layer at the end are the same shape. Need not be, and may be different.

  (Effect) When a shrink film of longitudinal uniaxial stretching or biaxial stretching is used, the shrinkage stress in the stretching direction is strong at the time of shrinkage, and the hot melt adhesive layer used in the conventional wound label is subjected to heat shrink treatment. At this time, the hot-melt adhesive is melted and the appearance is deteriorated to reduce the commercial value, or the label itself is peeled off and detached. In order to prevent this, if a UV hot-melt adhesive, a reactive hot-melt adhesive, or a method of welding labels is used, strong adhesion and peeling do not occur. However, when a UV hot melt adhesive is used, a special and expensive UV hot melt adhesive and a curing UV tunnel are required. In addition, when a reactive hot melt adhesive is used, it takes time until the adhesive force is developed, and the mounting operation is remarkably reduced in efficiency and high in cost. Furthermore, the method for welding the labels together requires a special and expensive laser welding apparatus, resulting in high costs.

  Then, even if it uses the hot-melt-type adhesive bond layer used with the conventional winding label, it came to this invention by using the film layer of the limited low shrinkage rate. That is, the shrinkage rate in the outer peripheral direction of the barrel portion after being immersed in hot water at 100 ° C. for 10 seconds as a film layer is 5% to 25%, and the shrinkage rate in the direction perpendicular to the outer peripheral direction of the barrel portion is −5% to 5%. % Film layer and a hot-melt adhesive layer as the adhesive layer, preferably, the shrinkage rate in the outer peripheral direction of the trunk after being immersed in hot water at 100 ° C. for 10 seconds as the film layer is 10% to A 15% thick stretched polyolefin film having a thickness of 20 μm to 100 μm and a hot melt adhesive layer having a thickness of 5 μm to 100 μm as an adhesive layer, that is, using an inexpensive thinned film layer, Even if it is adhered using a hot melt adhesive for labels, it can be mounted well without causing wrinkles on the label, detachment of the label, or misalignment of the label even when shrinking due to heating (shrink). Roll shrink label. In addition, the cylinder-attached shrink label requires a certain amount of stiffness for stable insertion into the bottle and prevention of displacement, and the film cannot be thinned. However, the film layer of the roll shrink label 1 of the present invention is inexpensive. A thin film layer can also be used. Since the roll-shrink-labeled container 230 using the roll-shrink label 1 of the present invention has a good fit between the bottle and the label, the appearance is good and the commercial value is increased.

  (Film Layer) As the film layer 10 used for the roll shrink label 1, a film that can be shrunk by heat treatment can be widely used, and further, a film having mechanical, physical, chemical strength, and printability is used. It is preferable. Such a film layer 10 can be appropriately selected depending on the application of the roll shrink label 1. For example, 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 can be suitably used, or The laminated film of a nonwoven fabric and the said film may be sufficient. Among these, a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a foamed polystyrene film, a laminate film of a nonwoven fabric and a shrink film, and a stretched polyester-polystyrene coextruded film One or more films selected from the group consisting of: The stretched film may be uniaxially stretched or biaxially stretched, and in the case of a uniaxially stretched film, it may be longitudinally uniaxially stretched or laterally uniaxially stretched. However, in a shrink label that is preliminarily attached to a container with a shrink label in a cylindrical shape and then subjected to heat shrink treatment, a lateral uniaxially stretched film is suitable, even when used as a roll shrink label 1, The lateral uniaxially stretched film is not limited, and any of lateral uniaxially stretched, longitudinal uniaxially stretched, and biaxially stretched films can be suitably used.

  In order for the roll shrink label 1 to have an effect as a shrink label, the shrinkage rate of the film layer 10 in the outer peripheral direction of the body portion is 5% to 25%, and the shrinkage rate in the direction perpendicular to the outer periphery direction of the body portion is −5% It is preferably 5%. The heat shrinkage rate in the present invention means that the film layer 10 is the outer peripheral direction of the body after being immersed in hot water at 100 ° C. for 10 seconds (the direction is the stretching direction of the film layer 10, so the stretching direction) (Also referred to as “the shrinkage rate”) is 5% to 25%, and the shrinkage rate in the direction perpendicular to the outer peripheral direction of the body portion is −5% to 5%. Therefore, in the case of a longitudinally uniaxially stretched film, the shrinkage direction is the film flow direction, so that the thermal shrinkage rate with respect to the flow direction is 5% to 25%. In the case of a laterally uniaxially stretched film, the shrinkage is in the film width direction. Therefore, the thermal shrinkage rate in the film width direction is 5% to 25%. In the case of a biaxially stretched film, the heat shrinkage rate may be set within the above range by annealing treatment or the like. If the shrinkage rate in the outer circumference direction of the body is less than this range, the heat shrinkage is insufficient to fit the bottle, and if it exceeds this range, the hot melt adhesive layer softens during heat shrinkage and the label is detached. In addition, the cost is high.

  The material of the film layer 10 is preferably a stretched polyolefin-based film having moderate and stable heat shrinkability and low cost. Specifically, a product name “Label-Lyte-Roll-” manufactured by Eclone Mobil Co., Ltd. On-Sink-on LR210 ", longitudinal uniaxially stretched polypropylene film with a maximum shrinkage of 18% in the longitudinal direction, longitudinally uniaxially stretched white polypropylene film manufactured by Nissei Kogyo Co., Ltd., Mitsui Chemicals Platec Co., Ltd., trade name" Sanipearl " An example is a stretched white foamed polypropylene film.

In addition, although the thickness of the film layer 10 is not specifically limited, It selects suitably in the range which does not impair heat resistance, rigidity, mechanical suitability, an external appearance, etc., and about 10-250 micrometers is applicable. Preferably, the film layer 10 is a stretched polyolefin film having a thickness of 20 μm to 100 μm.
If the thickness of the film layer 10 is less than this range, the mechanical strength is insufficient, and the film layer 10 is damaged at the time of heat shrinkage or deforms due to unstable shrinkage.

  More preferably, as the film layer 10, the shrinkage rate in the outer peripheral direction of the body portion is 10% to 15%, the shrinkage rate in the direction perpendicular to the outer periphery direction of the body portion is -5% to 5%, and the thickness is 20 μm to 100 μm. This is a combination of a stretched polyolefin film and a hot-melt adhesive having a thickness of 5 to 100 μm as an adhesive layer to be described later, and the above-mentioned effects can be obtained most stably.

  Prior to the formation of any layer of the roll shrink label 1, 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. Moreover, you may add various additives, such as a lubricant, a filler, a heat stabilizer, antioxidant, a ultraviolet absorber, an antistatic agent, a flame retardant, a coloring agent, to the film layer 10 as needed. .

  The film layer 10 is a single layer using one or more kinds of resins constituting the film layer 10 and using a film forming method such as an extrusion method, a cast molding method, a T-die method, a cutting method, an inflation method, or the like. Formed into a film by using two or more types of resin, multilayered by co-extrusion, etc., or formed by mixing two or more types of resin, using a tenter method or a tubular method. Various resin films formed by stretching in a uniaxial or biaxial direction can be used, but a suitable shrink film is a stretched film and a uniaxially stretched film in the flow direction. These films may be foamed films.

  (Easy-cut property) The film layer 10 is not limited to a single layer, and may be a laminated film of two or more films. Further, a vapor deposition film such as silicon oxide, aluminum oxide, or aluminum may be provided on these films. Good. The thickness of the laminated film is preferably about 20 to 300 μm. In the case where a plurality of film layers are used, it is preferable to use a film in which at least one layer has the ability to be easily cut in the outer circumferential direction of the body portion, and can be easily peeled off when the label is removed after the container is used. For the same reason, one or a plurality of perforations may be provided in a direction perpendicular to the outer peripheral direction of the body of the container of the roll shrink label 1.

  (Adhesive layer) As the adhesive layer 20, a hot-melt adhesive layer is used. The hot-melt adhesive layer is a heat-active adhesive layer having a melting point of about 55 to 170 ° C., regardless of whether the name is an adhesive or a pressure-sensitive adhesive. Acrylic hot melt adhesives, epoxy hot melt adhesives, urethane hot melt adhesives and the like can be preferably used. Generally, a (meth) acrylic acid ester polymer or a copolymer of (meth) acrylic acid ester and a monomer having a carboxyl group or a hydroxyl group such as (meth) acrylic acid or 2-hydroxyethyl methacrylate is used as a main component. An acrylic resin prepared by mixing a resin having a high softening point such as xylene resin or phenol resin and a tackifier is used. Further, in addition to this, an epoxy-based crosslinking agent is used, but it is not limited thereto. In addition, pigments, fillers, fluorescent additives, flow and leveling additives, wetting agents, surfactants, antifoaming agents, rheology modifiers, stabilizers, and antioxidizing agents are included within the range that does not impair their properties. But you can.

  (Tackifier) Examples of the tackifier include C5-C9 hydrocarbon resin, synthetic polyterpene, rosin, rosin ester, and natural terpene. In particular, useful tackifying resins are any suitable such as natural and modified rosins including gum rosin, wood rosin, tall oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin, and polymerized rosin. There is a resin or a mixture thereof. The above may use 2 or more types together.

  As thickness of the adhesive bond layer 20 which consists of a hot-melt-type adhesive agent, 5 micrometers-100 micrometers are preferable. If it is less than this range, the adhesive strength to the container is not sufficient, and it deforms at the time of heat shrinkage or peels and detaches, and if it exceeds this range, it is excessive and expensive.

  Since the adhesive layer 20 is often supplied to a label attaching device (also referred to as a labeler) with the film layer 10 in a roll state, the adhesive layer 20 also includes a roll shrink label 1 applied on a labeler machine.

  The adhesive layer 20 can be formed by a known roll coat or slit orifice coater method, and is not particularly limited. However, the hot melt adhesive is held in a heated and melted state using an applicator. Is preferred. At that time, the adhesive layer may be formed by cutting the raw roll (film layer 10) of the roll shrink label 1 into a predetermined size and then forming the adhesive layer. It may be cut.

  (Design Print Layer) In the roll shrink label 1, the design print layer 30 may be laminated on the container side and / or the opposite side of the label of the film layer 10. When the film layer 10 is composed of a plurality of layers, it may be formed between the layers or any surface. Moreover, the printing layer 30 may be formed over the full length of the roll shrink label 1, and it is not necessary to provide a design printing layer in the adhesive layer.

  The printing method is not limited, and a known printing method such as gravure printing, letterpress printing, screen printing, transfer printing, flexographic printing, or the like may be used. The printing may be back printing or front printing.

  (Outer layer) The roll shrink label 1 may be further provided with an outer layer on the side opposite to the adhesive layer 20 of the film layer 10. The outer layer can be appropriately selected depending on the application or design of the roll shrink label 1, and in the case of imparting the slipperiness of the label surface, the OP varnish is used to impart tactile sensation when the label is touched. In the case of using a suede ink, it is preferable to use a matte OP or the like when giving a matte feeling. The outer layer may be a printed layer, or the outer layer may be a laminate composed of two or more layers such as a printed layer and another layer.

  (Container) The container 190 to which the roll shrink label 1 can be attached is not particularly limited as long as it can be adhered by the adhesive layer 20. For example, the material of the container 190 is glass container; synthetic resin container such as PET; inorganic container such as ceramic bottle; metal container such as aluminum, iron, SUS; glass, synthetic resin, ceramic, metal, paper, etc. There are composite materials to include.

  It is preferable to use one or a plurality of resins as the container 190 because it is lightweight and excellent in mechanical strength, heat resistance, gas barrier properties, chemical resistance, aroma retention, hygiene, and the like. The container may be a single layer of the thermoplastic resin layer, but may have a multilayer structure in order to ensure gas barrier properties and light shielding properties. As a preferable resin, a polyester resin can be produced by injection molding, vacuum forming, pressure forming, or the like, but a so-called PET bottle formed by stretch blow molding is preferable.

  As a shape of the container 190, the container cross section of the roll shrink label adhesion part of the trunk is not limited to a round shape, and may be a polygonal shape such as a square or an octagon. In addition, the container body of the roll shrink label bonding part is not limited to the same diameter over the entire length of the body, but other than the container body having a rectangular longitudinal section, for example, a gourd type Also good. Since the roll shrink label 1 is affixed to the container 190 via the hot melt adhesive, it is sufficient that the container body has at least one, preferably two or more convex portions for bonding the roll shrink label. The shape of the part is not limited.

  As shown in FIG. 4, the minimum circumference (minimum circumference × 100 / maximum circumference (%)) with respect to the maximum circumference of the body portion of the container 190 is 75 to 100%, more preferably 75 to 95%, and particularly preferably. Is 85 to 90%. In the present invention, the “roll shrink label adhering portion” means a container portion covered with the roll shrink label in the container 230 with the roll shrink label after the heat shrink treatment. Furthermore, it is preferable that the peripheral diameters of W1 and W2 are equal with respect to a portion where the outer periphery of the container and the adhesive layer of the roll shrink label are in contact, for example, W1 and W2 in the case shown in FIG. This is because, if the container outer periphery and the container radius of the part to which the label is bonded are equal, the bonding is easy. On the other hand, in a labeler (label sticking device), if the label can be bonded, wound and fixed to the container by means such as forming an inclination corresponding to the difference in outer circumference or radius in the sticking drum, It is not limited.

  (Production method of roll shrink label) The production method of the container 230 with a roll shrink label of the present invention is (1) a label preparation step for preparing the film layer 10 of the roll shrink label according to any one of claims 1 to 4; (2) A cutting step of cutting the film layer 10 of the roll shrink label 1 into a desired dimension, and (3) forming a hot melt adhesive layer on the start end and the end of the roll shrink label 1 on the label container side. An adhesive layer forming step, (4) a winding step in which the roll shrink label is wound around the outer periphery of the container, and (5) a shrinking step in which the roll shrink label is contracted by heating the container to which the roll shrink label is fixed. It is a manufacturing method including.

  (Labeler) FIG. 2 shows an example of a preferred embodiment of a labeler (labeling device) for mounting the roll shrink label 1 on a container. The labeler has an original roll (110) supply unit, a label cutting device (150), a transfer drum (160), and a container supply unit (220) in addition to the sticking drum (180) and the applicator (200). Furthermore, a heat shrink device (250) is provided.

  A plurality of rolls for winding a roll (110) of the roll shrink label 1 and a tape (120) drawn from the roll (110) are wound around the roll roll (110) supply section. The tension roller (130) and the pulling device (140) are provided, and the tension of the tape (120) drawn from the original roll (110) is kept constant by the tension roller (130). The tape is inserted into a drawing device (140) composed of a pair of rollers, and continuously supplied to a cutting device (150) for cutting the tape (120) with a predetermined size.

  Next, the tape (120) is cut into a predetermined size by the cutting device (150), and the label (170) shown in FIG. 1 is manufactured. Since the inside of the tape (120) does not have adhesiveness, the cutting device (150) does not become uncut.

  In the vicinity of the cutting device (150), a negative pressure suction type transfer drum (160) and a sticking drum (180) are rotatably adjacently disposed. The label (170) produced by cutting the tape (120) is adsorbed on the peripheral surface of the transfer drum (160), and is designed so that the negative pressure on the peripheral surface is cut off when closest to the sticking drum (180). The label (170) is transferred to the sticking drum (180). The adhering drum (180) is also of a negative pressure suction type, and the surface side of the label (170) is covered over the section from the label receiving point by the transfer drum (160) to the label adhering point to the container (190). Adsorbed, that is, transported with the label (170) facing outward.

  In the vicinity of the sticking drum (180), an applicator (200) for applying a hot-melt adhesive serving as the adhesive layer 20 is provided inside the label (170). The applicator (200) is an adhesive roll (201) that can supply adhesive to the roll surface. The adhesive roll (201) may be a direct roll or a gravure roll. When the hot melt adhesive on the surface of the adhesive roll (201) is brought into contact with the inside of the label (170) transferred by the sticking drum (180), the adhesive layer 20 is formed on the label (170). Can do. The adhesive layer may be formed on the entire inner surface of the label (170), or may be formed only on the start sticking part (173) and the terminal sticking part (175). Further, it is preferable that a heating mechanism is built in the adhesive roll (201), and a hot melt adhesive heated to a predetermined temperature is applied to the label (170). Conventionally, a hot-melt adhesive layer is previously formed on the inside of a roll shrink label, and the hot-melt adhesive is activated by a heating device such as a thermal drum or a warm air generator provided in the vicinity of the sticking drum (180). In this method, a thermal drum is required, and in the method of supplying warm air, the sticking drum (180) is heated in a wide range, and the sticking drum (180) itself needs to be cooled. Occurs. However, according to the apparatus of the present invention, it is not necessary to provide a thermal drum or a cooling device, and the apparatus can be downsized.

  Preferably, the applicator (200) is further provided with a scraper (210) that scrapes off an excessively applied hot melt adhesive on the inside of the label (170). An example of the mechanism of such a scrapper (210) is shown in FIG.

  As shown in FIG. 3, an auxiliary roll (205) is adjacent to the adhesive roll (201) with a predetermined gap, and the auxiliary roll (205) is adjacent to the adhesive roll (203) with a predetermined gap. is doing. These rolls are synchronized to rotate in conjunction with the rotational speed of the surface of the adhesive roll (201). The scraper (210) is a spatula that scrapes off the adhesive layer formed by the adhesive roll (201) to a predetermined thickness. The front end is fixed within the applicator (200) to form a predetermined distance from the adhesive layer of the label (170), and the rear end of the scraper (210) is connected to the adhesive roll (203). It is fixed independently of the rotation of the adhesive roll (203) so as to form a predetermined interval. Thereby, the adhesive scraped off from the front end portion of the scraper (210) is transferred to the rear end portion of the scrapper (210) in response to the rotation of the sticking drum (180). The auxiliary roll (205) is adjacent to the adhesive roll (203), and the adhesive recovered by the adhesive roll (203) moves to the auxiliary roll (205). The auxiliary roll (205) is provided with a scraper (213) that scrapes off the adhesive on the surface of the adhesive roll (203) to facilitate the transfer of the adhesive to the auxiliary roll (205). . Similarly, the adhesive roll (201) is provided with a scraper (215) that scrapes off the adhesive on the surface of the auxiliary roll (205) and transfers it to the adhesive roll (201). In the present invention, the UV hot-melt adhesive or UV adhesive recovered by the adhesive roll (203) can be used by the adhesive roll (201) by these mechanisms, and the amount of adhesive can be reduced. In addition, as shown in FIG. 3, when the adhesive roll (201) is provided with irregularities so that the adhesive is supplied only at predetermined locations and synchronized with the rotation of the sticking drum (180), the label (170) The adhesive layer 20 can be formed only at the start end portion and the end end portion. The applicator (200) only needs to have at least one adhesive roll (201), but may be plural. Similarly, a plurality of auxiliary rolls (205) may be provided. Further, the shape of the scraper (210) is not limited to the wedge shape shown in FIG. 3, and may be an arc shape capable of forming a tangent to the adhesive layer.

  The label (170) on which the hot-melt adhesive is formed is transferred toward the sticking point of the container (190) by the rotation of the sticking drum (180). The transfer device (220) of the container (190) indicated by the arrow is adjacent to the sticking drum (180), and the container can be transported in the tangential direction of the sticking drum (180). The transport device (220) is configured to forcibly rotate the container (190) at the time of label sticking. When the container (190) reaches the sticking point, the starting end sticking part of the label (170) and the container (190) are brought into contact with and bonded to each other. By this adhesion, the container (190) is forcibly rotated, and the remaining part of the label (170) is wound around the outer periphery of the container (190) by the rotation of the container, and then the label surface of the start end sticking part and the end sticking part The innermost layer of the label (170) is adhered.

  More specifically, the container (190) is transferred by the transport device (220) so that the start end sticking part of the label (170) transferred by the sticking drum (180) and the container (190) can be bonded. . Due to the contact pressure between the two, the start end sticking portion of the label (170) and the container (190) are bonded. The transport device (220) has a rotation mechanism (not shown) so that the container (190) rotates in synchronization with the sticking drum (180), and the start end sticking part of the label (170), the container (190), , The container (190) is rotated in synchronization with the sticking drum (180) by the rotating mechanism, and the remaining part of the label (170) can be wound around the outer periphery of the container (190). In addition, since the remainder of the label (170) is sucked by the sticking drum (180), the label remainder can be wound around a predetermined position. Next, the label surface of the start end sticking part is bonded via the adhesive layer 20 of the end sticking part.

  When the label (170) is brought into contact with and adhered to the container (190), pressure is applied from the surface side of the label (170) toward the sticking drum (180), so the label (170) is applied to the container (190). If a sticking part exists, a roll shrink label can be adhere | attached, wound and fixed via an adhesive agent irrespective of the shape. When the winding and fixing of the label (170) by the sticking drum (180) are completed, the hot melt adhesive is solidified by natural cooling or forced cooling.

  The label (170) is transferred to the heat-shrink device (250) and acts on hot air of a predetermined temperature, for example, 60 to 220 ° C., steam heated by steam and steam from which water vapor has condensed, and radiant heat such as infrared rays. Thereby, the roll shrink label can be highly shrunk in the circumferential direction, and the container 230 with the roll shrink label in which the body portion of the container is covered with the roll shrink label 1 can be manufactured.

  (Manufacturing method of a container with a roll shrink label) The roll shrink label 1 is attached to the container 190 via a hot melt adhesive, and the adhesive is solidified at the same time. The roll shrink label is wound around the entire circumference of the container. The method is not particularly limited as long as it can be rotated and fixed, and may be manually attached to the container. On the other hand, when using a labeler, it is preferable to use the labeler.

  (First Step) First, a label preparation step for preparing the film layer 10 of the roll shrink label according to any one of claims 1 to 4. The film layer 10 of the roll shrink label 1 is manufactured and prepared as described above.

  (2nd process) It is the cutting process which cuts the film layer 10 of the said roll shrink label 1 to a desired dimension. A roll (110 corresponding to the film layer 10) (110) of the roll shrink label 1 before the adhesive layer 20 is formed on the labeler is attached to the roll supply section, and the tape (120 ) Is transferred to the cutting device (150) through the pulling device (140) while maintaining the tension constant by the tension roller (130), and the cutting device (150) cuts the tape (120) into a predetermined size. .

  (Third step) This is an adhesive layer forming step of forming a hot melt adhesive layer on the start and end portions of the roll shrink label on the label container side. Hot melt type adhesion by an applicator (200) which is transferred to a sticking drum (180) via a transfer drum (160) in the vicinity of the cutting device (150) and arranged relative to the sticking drum (180). The agent is applied and excess adhesive is collected by the scraper (210).

(4th process) It is a winding process which winds a roll shrink label around the outer periphery of the container 190. FIG. The label (170) on which the adhesive layer 20 is formed is transferred toward the sticking point of the container (190) by the rotation of the sticking drum (180), and the container (190) supplied by the transport device (220). When contact is made and the label (170) adheres to the container (190) and is wound and fixed, the hot melt adhesive is solidified and adhered by natural cooling or forced cooling.
As described above, the container (190) and the label (170) are adhered to each other by adhering the start end sticking part of the label (170) and the container (190), and then the remaining part of the label (170) is attached to the container (190). It can be performed by wrapping around the outer periphery, and then adhering the label surface of the start end sticking portion, the innermost label layer of the end sticking portion, and the adhesive of the end sticking portion. When the label (170) is bonded to the container (190), the label (170) is pressed from the surface side by the sticking drum (180), and therefore has an adhesive surface regardless of the shape of the container (190). If it is a thing, a start end sticking part and a terminal sticking part can be simply adhere | attached via an adhesive agent.

  (Fifth step) This is a shrinking step of shrinking the roll shrink label by overheating the container on which the roll shrink label is wound and fixed. Subsequently, it transfers to a heat contraction apparatus (250). In the heat-shrinking device (250), hot air of a predetermined temperature, for example, 60 to 220 ° C., steam heated by steam and steam from which water vapor has condensed, and radiant heat such as infrared rays are applied. Thereby, the roll shrink label can be contracted in the circumferential direction, and the container 230 with the roll shrink label in which the body portion of the container is covered with the roll shrink label can be manufactured.

  (Additional step) Further, a perforation step of providing a perforation in a direction perpendicular to the outer peripheral direction of the body portion of the roll shrink label may be included. The perforation can be easily detached at the time of disposal after use.

  (Effect) According to the manufacturing method of the roll-shrink-labeled container 230 of the present invention, the UV curing device, which is necessary when using the UV hot melt adhesive, is specially necessary when welding the film layer. An expensive welding device is unnecessary, and it can also be used as a label line for wound labels. In addition, the cylinder pasting shrink label requires a process of making the cylinder pasted in advance, but the cylinder pasting process is unnecessary, and it can be manufactured at a low cost by a highly efficient manufacturing method with few processes. Furthermore, the cylinder-attached shrink label can be operated only at a low speed for stable insertion into the bottle and prevention of displacement, but it can be manufactured at a low cost because it can be speeded up.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this. In addition, except a solvent, each composition of each layer is a mass part of solid content conversion.

Example 1 As a film layer, a 30 μm thick MD direction uniaxially stretched polypropylene film (MD direction thermal shrinkage at 100 ° C. 20%, TD direction thermal shrinkage 0.2%) is used on the container surface side. The desired design was subjected to gravure printing with multiple rows of repeating multiple rows, and this was used as a raw roll.
The raw roll is mounted on a labeler (label attachment device), cut into a desired size, and a hot melt adhesive (Toyo Adre Co., Ltd. BL) is used as an adhesive at the attachment portions (start and end portions) at both ends of the label. -8603C) was supplied and applied, and a roll shrink label label was adhered, wound and fixed to a PET bottle container which was separately supplied and conveyed.
In the above description, the roll shrink label 1 of Example 1 is the time when the raw roll is mounted on the labeler and the hot melt adhesive is supplied and applied. Specifically, the hot melt adhesive is heated and melted at 135 ° C. with an applicator on the labeler machine, applied to the label attachment part (starting end part and terminal end part), and the roll shrink label is attached to the container. The body to be affixed to the label was pressed from the outer surface of the roll shrink label and brought into contact therewith to adhere both. Next, the remaining part of the label was wound around the PET bottle body, and the label end pasting part was adhered to the surface of the starting end pasting part.
Next, the container wrapped with the label was passed through a steam type shrink tunnel (heat shrinking device) at 85 to 95 ° C. to fit the label into the container shape, and a container 230 with a roll shrink label was manufactured.
The obtained roll-shrink-labeled container 230 has been subjected to a heat shrinking process, but none of the occurrence of label wrinkles, label detachment, and label sticking misalignment was observed and was satisfactory. It was.

  The peel strength between the label and the label is 1.5 N / 15 mm width, the peel strength between the container and the label is 1.4 / 15 mm width, and the shear strength between the label and the label is 4.2 / 15 mm width. The shear strength between the container and the label was 3.9 N / 15 mm width, and both the peel strength and the shear strength were good. For the peel strength, a test piece was cut into a length of 50 mm and a width of 15 mm, and the edge was peeled off to create a pinch. This was measured at a tensile speed of 300 mm / min by 180 degree peeling according to JIS K6854 using a tensile tester (manufactured by Orientec Co., Ltd.), and measured at a peeling strength per 15 mm (unit: N / 15 mm). . For the shear strength, a test piece was cut into a length of 70 mm and a width of 15 mm, and measured with a tensile tester at 300 mm / min according to JIS K6850.

  Example 2 Example 1 except that an MD direction uniaxially stretched polypropylene film having a thickness of 30 μm (maximum heat shrinkage rate in the MD direction at 100 ° C. of 15% and maximum heat shrinkage rate in the TD direction of 0.1%) is used. In the same manner, a roll shrink label 1 of Example 2 was obtained. When a container 230 with a roll shrink label was produced in the same manner as in Example 1, it was subjected to a heat shrinking process. However, the occurrence of wrinkles on the label, the detachment of the label, Was also not observed.

  (Example 3) Except for using a MD direction uniaxially stretched polypropylene film having a thickness of 30 μm (maximum heat shrinkage rate in MD direction at 100 ° C., 10% in MD direction and −0.1% in TD direction). In the same manner as in Example 1, a roll shrink label 1 of Example 3 was obtained. When a container 230 with a roll shrink label was produced in the same manner as in Example 1, it was subjected to a heat shrinking process. However, the occurrence of wrinkles on the label, the detachment of the label, Was also not observed.

  (Comparative Example 1) Example 1 except that an MD direction uniaxially stretched polypropylene film having a thickness of 30 μm (maximum heat shrinkage rate in MD direction at 100 ° C., 50% in TD direction and 0.2% in TD direction) is used. In the same manner, a roll shrink label 1 of Comparative Example 1 was obtained. When a container 230 with a roll shrink label was produced in the same manner as in Example 1, slight shrinkage of the film was observed due to the heat of the hot melt agent when the hot melt agent was applied, and the appearance deteriorated. Further, the hot melt agent could not withstand the shrinkage stress of the film when passing through the shrink tunnel, and the label was dropped.

  (Comparative Example 2) Same as Example 1 except that a MD direction uniaxially stretched polypropylene film having a thickness of 30 μm (MD direction maximum heat shrinkage 20%, TD direction maximum heat shrinkage 10% at 100 ° C.) is used. Thus, a roll shrink label 1 of Comparative Example 2 was obtained. When a container 230 with a roll shrink label was produced in the same manner as in Example 1, the film contracted in the TD direction simultaneously with the shrinkage of the label in the MD direction when passing through the shrink tunnel, so that it fits the bottle after passing through the shrink tunnel. Wrinkles were observed on the label.

  (Industrial applicability) The main uses of the roll shrink label 1 of the present invention include soft drinks, seasonings, liquors (Japanese sake, barley, sparkling wine, wine, shochu, distilled liquor, etc.), cooking oil It can be suitably used as a roll shrink label used for cosmetic containers, toiletries, dehumidifier containers, detergent containers, ampoule bottles, energy drinks, eye drop containers, medicine containers, dessert containers and the like. However, it can be applied to containers made of various materials such as metals and synthetic resins as long as it can be bonded by a hot melt adhesive, that is, using an inexpensive thin film layer, Even when bonded using a melt adhesive, even when shrinking due to heating (shrinking), the label is not wrinkled, the label is detached, and the label is not misaligned. If it is a use which requires the feeling of fitting, it will not be specifically limited.

1: Roll shrink label 10: Film layer 20: Adhesive layer 30: Design printing layer 40: Outer layer W, W1, W2, W3: Affixing part 110: Original fabric roll 120: Tape 130: Tension roller 140: Drawer 150: Label cutting device 160: Transfer drum 170: Label 180: Adhesive drum 190: Container 200: Applicator 201, 203: Adhesive roll 205: Auxiliary roll 210: Scraper 220: Conveying device 230: Container with roll shrink label 250: Heating Contraction device

Claims (8)

  A roll shrink label that is wound around and mounted on the outer peripheral surface of the body of the container, comprising a film layer and at least an adhesive layer provided on both ends of the outer periphery of the roll shrink label, the film layer being The shrinkage rate in the outer periphery direction of the trunk portion after being immersed in hot water of 100 ° C. for 10 seconds is 5% to 25%, and the shrinkage rate in the direction perpendicular to the outer periphery direction of the trunk portion is −5% to 5%, A roll shrink label, wherein the adhesive layer is a hot-melt adhesive layer.   The film layer is a stretched polyolefin film having a thickness of 20 μm to 100 μm and a shrinkage rate of 10% to 15% in the outer peripheral direction of the body after the film layer is immersed in hot water at 100 ° C. for 10 seconds, and the adhesive layer is The roll shrink label according to claim 1, which is a hot melt adhesive layer having a thickness of 5 to 100 µm.   The roll shrink label according to any one of claims 1 to 2, wherein the film layer is composed of a plurality of layers, and at least one layer has easy cut suitability in the outer peripheral direction of the body portion.   The roll shrink label according to any one of claims 1 to 3, wherein the adhesive layer is supplied to a labeler in a state where the film layer is in a roll state, and is applied on the labeler.   The roll shrink label according to any one of claims 1 to 4, wherein one or a plurality of perforations are provided in a direction perpendicular to the outer peripheral direction of the body portion of the roll shrink label.   A container with a roll shrink label, wherein the roll shrink label according to any one of claims 1 to 5 is mounted on a container and subjected to a heat shrink process.   It is a manufacturing method of the container with a roll shrink label of Claim 6, Comprising: (1) The label preparation process which prepares the film layer 10 of the roll shrink label in any one of Claims 1-4, (2) The said This is a cutting step of cutting the film layer 10 of the roll shrink label 1 into a desired dimension. (3) Adhesive layer forming step of forming a hot melt adhesive layer on the start and end portions of the roll shrink label on the label container side, (4) A winding step of winding and adhering the roll shrink label around the outer periphery of the container, 5) A method for producing a container with a roll shrink label, which is a shrinking step in which the container to which the roll shrink label is fixed is heated to shrink the roll shrink label.   The roll characterized by the above-mentioned in the manufacturing method of the container with a roll shrink label of Claim 7, Furthermore, the perforation process which provides the perforation of a perpendicular | vertical direction at least with respect to the trunk | drum outer peripheral direction of the said roll shrink label is included. Manufacturing method of container with shrink label.