JP2008145498A - 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 that can be directly attached to a container. <P>SOLUTION: The roll shrink label to be wound on the circumference surface of a container body section comprises a base film layer 10 and an adhesive layer 20 provided at least on both ends of the label. The adhesive layer is composed of a UV hot-melt adhesive and/or a UV adhesive. With the roll shrink label, a container with roll shrink label can be manufactured with high productivity. The roll shrink label is excellent in appearance after heat shrink processing, and can be suitably used even when the content of the container is a hot product. <P>COPYRIGHT: (C)2008,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 of a container, a container with a roll shrink label around which the roll shrink label is wound, and more specifically, UV in advance on the outer peripheral surface of the body of the container. The present invention relates to a roll shrink label coated with a curable adhesive, and a container with the roll shrink label in which the roll shrink label is wound and fixed, and then the adhesive layer is cured by UV irradiation, and a method for producing the same.

  Plastic bottle containers such as polyethylene terephthalate are widely used in applications that contain soft drinks, liquid seasonings, cosmetics, etc. because they have excellent properties such as transparency, mechanical strength, and calorific value during combustion. A printed label is attached to the container for display purposes, or a shrink film or the like is used for light shielding purposes.

  As a method for attaching a label over the entire circumference to such a container, there is a method in which a label that has been bonded in a cylindrical shape is externally attached to the container (Patent Document 1). The label used in Patent Document 1 is attached to the outer peripheral surface of the bottle body using the self-stretching or self-recovering property of the film, and the outer peripheral surface of the bottle body constituting the bottle for filling soft drinks such as tea This is a stretch label that prevents the bottle body from falling off from the outer peripheral surface of the bottle, forms an adhesive layer on the inner edge of the label, and applies corona discharge treatment to the label surface edge to provide a corona discharge treatment surface. It is a cylindrical stretch label that is formed and bonded with the adhesive layer and the corona discharge treatment surface facing each other to form a bonded portion and tightly bonded to the outer peripheral surface of the bottle body.

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

  On the other hand, instead of the method of externally fitting a cylindrical label to a container, the label is adhered to the container end via an adhesive, and the other end is attached to the container via an adhesive after the remaining label is wound around the container. There is also a technique of fixing (Patent Document 3). Simply attach the adhesive to the back side of the label, attach it to the peripheral surface of the container in order from the start end side of the label, and stack the end of the label on the start end, making it difficult to peel off the label after use, Also, if an adhesive with weak adhesive strength is used to enhance the peelability of the label, the overlapping part of the label may be inadvertently peeled off during the product distribution process, etc. The method using a label is made in view of problems such as an expensive cylindrical label. The label described in Patent Document 3 forms a hard-to-adhesive layer having adhesiveness to the adhesive before curing and peelability to the cured adhesive on the back surface of the label. It is a label for sticking both ends of the label in a state where the container adhesive layer is further laminated, the container adhesive layer is adhered to the peripheral surface of the container and the label back surface is temporarily adhered, and the label can be easily removed after use And so on.

Furthermore, an apparatus for sticking such a wound label to a container is also disclosed (Patent Document 4). The device described in Patent Document 4 is for attaching a label to a container through a heat-sensitive adhesive, and producing a label by drawing out a raw roll having a heat-sensitive adhesive layer on the back and cutting it into a predetermined size. And it is an apparatus which heats a label before sticking, gives adhesiveness to the back of a label, and sticks this label on a container peripheral surface. The apparatus described in Patent Document 4 includes a sticking drum for sticking a label to a container, and a heating unit that heats the adhesive surface of the label conveyed by the sticking drum to activate the adhesive. In order to suppress the delivery roller from being heated by the means, the label sticking apparatus is provided with a cooling means for cooling the delivery roller, and a partition plate is provided between the delivery roller and the heating means.
JP 2003-205946 A JP 2006-117269 A JP 2000-242179 A JP-A-11-91751

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

  On the other hand, it is convenient if the 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. In the method of bonding a container and a shrink label with a hot-melt adhesive, when the container is in a high temperature condition after bonding, the hot-melt adhesive may melt and impair the appearance. In particular, when the contents of the container are heated products, the hot melt adhesive may melt during transfer or within the sales period depending on the storage temperature of the contents. In some cases, the hot-melt adhesive may melt out.

  Further, when a reactive hot melt adhesive is used, it has heat resistance after curing, but the productivity is lowered due to the long reaction time.

  Furthermore, in the label sticking device described in Patent Document 4, in addition to the label sticking mechanism, a cooling means for suppressing heating of the delivery roller, and a delivery roller and a heating means for suppressing heat transfer. A partition plate or the like is required, and the apparatus becomes large.

  In view of such a current situation, it is desired to develop a roll shrink label that can be easily attached to a container, can store contents under a wide range of conditions, and can be stored.

  In addition, it is desired to develop a label sticking device that can efficiently roll and fix a roll shrink label on a container.

  As a result of a detailed examination of the roll shrink label that is wound around the outer peripheral surface of the body portion of the container, the present inventor has found that a UV hot melt adhesive, other UV adhesives, UV, Using an adhesive and curing the adhesive layer by UV irradiation after bonding to the container, the adhesive does not melt due to heat even when performing a heat shrinking process, and with a stable label adhesive strength, The present inventors have found that a container with a roll shrink label can be manufactured at high speed and with high production efficiency.

  Also, when manufacturing containers with roll shrink labels, use a label without an adhesive layer, cut it to a predetermined size, and then form an adhesive layer, which activates without providing a hot air heating device It is possible to prepare a roll shrink label having an adhesive layer, and if this is immediately applied to a container, a container with a roll shrink label can be efficiently produced and the apparatus can be made compact. The headline and the present invention were completed.

  Further, in this apparatus, after applying the adhesive to the roll shrink label, the excess adhesive can be scraped off to reduce the amount of adhesive to be used, and the appearance of the container can be improved by the excess adhesive protruding. The present invention was completed by finding out that it was not damaged.

  That is, the present invention is a roll shrink label that is wound around and mounted on the outer peripheral surface of a body portion of a container, and includes a base film layer and an adhesive layer provided at least at both ends of the label. A roll shrink label is provided that is a hot melt adhesive and / or a UV adhesive.

  Moreover, this invention provides the container with a roll shrink label by which the said roll shrink label was stuck to the container.

  Furthermore, the present invention includes a step of forming a UV hot-melt adhesive layer and / or a UV adhesive layer on a start end portion and a termination portion inside the label of a roll shrink label including at least a base film layer, the roll shrink A step of adhering a starting adhesive layer of the label and the container, a step of winding the remaining portion of the roll shrink label around the outer periphery of the container, a step of adhering the terminal adhesive layer and the label starting end, and the roll shrink label A container with a roll shrink label, comprising: a step of irradiating UV to a wound and fixed container to cure an adhesive layer contained in the affixing portion; and a step of applying heat to the container to shrink the label A manufacturing method is provided.

  In addition, the present invention provides an adhesive drum that conveys the inside of the roll shrink label toward the outside and adheres the roll shrink label to a container, and an inside of the roll shrink label that is conveyed by the adhesive drum. A labeling device comprising a UV hot melt adhesive and / or an applicator for applying a UV adhesive, the applicator comprising an adhesive roll for applying the UV hot melt adhesive and / or the UV adhesive; It is an object of the present invention to provide a label applicator characterized by having an excessively applied UV hot melt adhesive and / or a scraper that scrapes off the UV adhesive.

  Since the roll shrink label of the present invention can be wound around a container and attached, the process of forming the label into a cylindrical shape is unnecessary, the production process can be simplified, and the cost can be reduced. Moreover, since the roll shrink label of this invention has high adhesive stability, a roll shrink label can be affixed to a container at high speed, and production efficiency can be improved. In addition, since the adhesive layer can be cured by UV irradiation, the adhesive layer can be cured in a short time unlike a reactive hot-melt adhesive, for example, and productivity can be further improved. it can.

  In addition, the container with the roll shrink label of the present invention is less likely to melt the adhesive even in a high-temperature atmosphere, is easy to handle during storage, transportation, etc. Excellent. In particular, since the adhesive does not melt even under high temperature conditions and is stable, it can be suitably used for a container for a warmed product.

  Moreover, according to the manufacturing method of the container with a roll shrink label of this invention, since an adhesive bond layer is formed inside a roll shrink label by a manufacturing process, it is not necessary to use a release paper, and a roll shrink label is attached efficiently. Containers can be manufactured.

  Furthermore, in the apparatus for manufacturing a container with a roll shrink label according to the present invention, since an adhesive roll is used in the applicator, a heat sensitive drum or the like is not required to heat the roll, and the apparatus can be miniaturized.

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

(1) Configuration of Roll Shrink Label The roll shrink label of the present invention is a roll shrink label that is wound around and mounted on the outer peripheral surface of the body of the container, and includes a base film layer and an adhesive layer provided at least at both ends of the label. The adhesive layer is a roll shrink label, which is a UV hot melt adhesive and / or a UV adhesive. The use of UV hot melt adhesive and / or UV adhesive enables the container and the roll shrink label affixing part to be fixed by their adhesiveness, and can be rapidly applied by irradiating UV after application. The adhesive layer is cured, and it is possible to prevent melting of the adhesive layer formed between the container and the label and between the label and the label during the subsequent heat shrink treatment by heat, and the content is added. This is because melting of the adhesive layer in the case of a warm substance can be prevented. In the roll shrink label of the present invention, a printing layer may be further laminated inside the base film layer, and an outer layer may be laminated on the surface side of the base film layer. In the present invention, the “roll shrink label” is a label that shrinks by heat treatment, but it does not matter whether heat shrinkage occurs. Therefore, it is a roll shrink label both before and after heat shrinkage.

  FIG. 1 shows a preferred embodiment of the roll shrink label of the present invention. The roll shrink label of this invention has the sticking part (W) for attaching to a container. Fig.1 (a) consists of a base film layer (10) and an adhesive layer (20), and an adhesive layer (20) is only in the sticking part (W) inside the label of the base film layer (10). It is the formed aspect.

  Moreover, the aspect which has a design printing layer (30) is shown in FIG.1 (b). In FIG.1 (b), it has become the aspect by which the adhesive layer (20) is formed in the label inner side of the base film layer (10), without providing the printing layer in the sticking part (W).

  FIG.1 (c) shows the aspect which has an outer layer (40) further on the label surface of the base film layer (10) of the roll shrink label of FIG.1 (b). In addition, a base film layer (10) is not limited to a single layer, A laminated film of two or more layers may be sufficient.

  In the present invention, the size of the roll shrink label can be appropriately selected according to the size of the container to be attached. 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.

  In the present invention, an adhesive layer is provided at least at the start and end of the inside of the roll shrink label, and a UV hot melt type adhesive layer and / or a UV adhesive layer is formed on the adhesive layer. The present invention is not limited to the start and end portions of the label. Therefore, the adhesive layer may be formed on the entire inner surface of the roll shrink label, or the adhesive layer may be formed in a frame shape over the entire inner periphery of the roll shrink label. Furthermore, in the case of a container having a difference between the maximum circumference and the minimum circumference as shown in FIG. When two labels W1 and W2 shown in FIG. 5 are used and the label is wound around the container and the label end portion is bonded to the start end portion, the label and the label are bonded at W3. For this reason, in the roll shrink label of the present invention, it is not necessary that the start adhesive layer and the end adhesive layer of the roll shrink label have the same shape. In FIG. 5, ← indicates the UV irradiation direction, whereby the adhesive layer is cured.

  The roll shrink label of the present invention is not limited to an adherend. As long as it can be bonded by a UV hot melt adhesive and / or a UV adhesive, it can be applied to containers made of various materials such as metals and synthetic resins, and its use is not limited. Therefore, soft drinks, seasonings, liquor (Japanese sake, barley liquor, sparkling liquor, wine, shochu, distilled liquor, etc.), cooking oil, cosmetic containers, toiletries, dehumidifier containers, detergent containers, ampoule bottles, energy drinks, eye drops It can be suitably used as a roll shrink label used for containers such as medicine containers, medicine containers, and desserts.

(2) Base film layer As the film constituting the base film layer constituting the roll shrink label, one that can be shrunk by heat treatment can be widely used, and further, mechanical, physical, chemical strength, It is preferable to use a film having printability. Such a film can be appropriately selected depending on the use of the roll 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 formed from resin such as polymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer, laminate of nonwoven fabric and shrink film Film, polyester-polystyrene co-extruded film, polyamide film such as 6 nylon film, 6, 6 nylon film, etc., modified poly formed from resin such as chlorinated polyethylene, chlorinated polypropylene Les fins film, vinyl chloride - is film formation of a resin-vinyl acetate copolymer film, 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 can be suitably used. 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 laminate film of a nonwoven fabric and a shrink film, and a stretched polyester-polystyrene coextruded film One or more films selected from the group consisting of: The stretched film may be uniaxially stretched or biaxially stretched, and in the case of a uniaxially stretched film, it may be longitudinally uniaxially stretched or laterally uniaxially stretched. However, in the case of a shrink label in which a shrink label is previously attached to a container and then subjected to heat shrink treatment, a laterally uniaxially stretched film is suitable, whereas the wound label of the present invention is used as a shrink label. However, it is not limited to a laterally uniaxially stretched film, and any of laterally uniaxially stretched, longitudinally uniaxially stretched, and biaxially stretched films can be suitably used.

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

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.

  The base film layer is not limited to a single layer of the film, and may be a laminated film of two or more films. Further, a vapor deposition film of silicon oxide, aluminum oxide, aluminum, or the like is formed on these films. It may be provided. As thickness of a laminated film, what is formed in about 10-300 micrometers is preferable.

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

(3) Adhesive layer In the roll shrink label of the present invention, a UV hot-melt adhesive or UV adhesive is used as the adhesive layer. UV hot melt adhesives and UV adhesives are cured by UV irradiation, so using them as an adhesive layer prevents the adhesive layer from melting even in a high temperature atmosphere such as a heat shrinking process after curing. It can be suitably used for a roll shrink label that requires a heat shrink process. In addition, UV hot-melt adhesives and UV adhesives can be cured in a short time and improved productivity, unlike reactive hot-melt adhesives.

(I) UV hot melt adhesive The UV hot melt adhesive has a melting point of 55 to 170 ° C. before UV irradiation and is cured by UV irradiation. It doesn't matter if it is.

  In the present invention, an acrylic UV hot melt adhesive, an epoxy UV hot melt adhesive, and a urethane UV hot melt adhesive can be preferably used as the UV hot melt adhesive.

(I-1) Acrylic UV hot melt adhesive As an acrylic UV hot melt adhesive, an example of a UV curable adhesive composition having the above properties is an acrylic polymer, an acryloyl group-containing monomer, and The thing containing a photoinitiator can be illustrated.

  Acrylic polymers include methyl (meth) acrylic acid, ethyl (meth) acrylic acid, n-butyl (meth) acrylic acid, i-butyl (meth) acrylic acid, t-butyl (meth) acrylic acid, bexyl (meth) ) Acrylic acid, 2-ethylhexyl (meth) acrylic acid, n-octyl (meth) acrylic acid, isooctyl (meth) acrylic acid, n-nonyl (meth) acrylic acid, isononyl (meth) acrylic acid, decyl (meth) acrylic A homopolymer or copolymer of acid, lauryl (meth) acrylic acid, stearyl (meth) acrylic acid. Furthermore, (meth) acrylic acid, vinyl acetate, styrene, acrylonitrile, acrylamide, and diethylaminoethyl (meth) acrylic acid may be copolymerized with the above monomers within the range not impairing the characteristics. The polymer can be produced by a radical polymerization method, a solution polymerization method, a bulk polymerization method, a suspension polymerization method, or the like. Preferred acrylic polymers in the present invention include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate, and bexyl (meth). Acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, lauryl (meth) acrylate, Stearyl (meth) acrylate, among which n-butyl acrylate and 2-ethylhexyl acrylate are preferably used. The weight average molecular weight of the acrylic polymer used in the present invention is from 50,000 to 180,000, more preferably from 80,000 to 150,000. Further, the glass transition temperature (Tg) of the resin is preferably −20 ° C. or less in view of problems such as coating properties and adhesiveness.

  Examples of the monomer having three or more acryloyl groups in the molecule include trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, and pentaerythritol hexaacrylate. These can be used alone or in combination of two or more.

  Benzophenones can be preferably used as the photoinitiator. Examples include benzophenone and derivatives thereof, p-chlorobenzophenone, p-dimethylaminobenzophenone, and the like, and it is particularly preferable to use benzophenone.

  The compounding amount of each of the above components is 0.1 to 2 parts by mass, more preferably 0.5 to 1.5 parts by mass of a monomer having 3 or more acryloyl groups in the molecule with respect to 100 parts by mass of the acrylic polymer. Parts and photoinitiator in a proportion of 0.5 to 5 parts by mass, more preferably 0.5 to 3 parts by mass. When the amount of the monomer exceeds 2 parts by mass, the gel fraction after ultraviolet irradiation exceeds 75%, the adhesive force at the adherend interface may be lowered, and the shear strength may be lowered.

When an ultraviolet ray is irradiated to the compound containing the above components, the acrylic polymer and the monomer are polymerized and polymerized by the photoinitiator. At this time, since the monomer is a polyfunctional compound, it becomes a high-density cross-linked polymer, which is further entangled with an acrylic polymer to form a cross-linked structure, and is considered to have high shear and high cohesive force. The acrylic UV hot melt adhesive has a gel fraction of 30 to 75%, preferably 40 to 65%. This is because within this range, the shear strength is 5 kg / cm ² or more. In addition, the said acrylic UV hot-melt-type adhesive agent can be used by heating in the temperature range of 100-120 degreeC. Further, the integrated light amount (illuminance × time) required for curing is 100 to 2000 mJ / cm ² , preferably 100 to 1000 mJ / cm ² .

(I-2) Epoxy UV Hot Melt Type Adhesive Epoxy UV hot melt type adhesives include epoxidized block copolymers, photoinitiators, tackifiers and the like.

  Epoxidized block copolymers include alicyclic epoxies such as “CYRACURE UVI6110” available from Dow Chemical; olefinic polymers, oligomers or monomers having a C—C double bond chain at the main chain or terminal ( The polarity of the main chain may be any of aliphatic, urethane, polyester, polyether, etc.), and base resins described in US Pat. No. 5,516,824 and US Pat. No. 5,776,998 It may be.

  Photoinitiators are those corresponding to the base resin, from epoxidized block copolymers, cycloaliphatic epoxides, and Sarcat CD1010 (available from Sartomer), Sarkat CD1011 and Sarkat CD1012, and Dow Chemical There are vinyl ether olefins containing sulfonium or iodonium salts such as Syracure UVI 6974 available. Further, for free radical curing systems such as olefin or thiol-ene curing systems, the following photoinitiators may be suitable: IRGACURE 651, 184 and 1700 available from CIBA-GEIGY. And DAROCURE 1173, and GENOCURE LBP available from Rahn; and ESACURE KIP150 available from Sartomer. Photoinitiators that can be used include benzophenone, benzyldimethyl ketal, isopropyl-thioxanthone, bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide, 2-hydroxy-2-methyl -1-phenyl-1-propanone, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxides, 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2- (dimethyl-amino) -1--4- (4- Morpholinyl) phenyl-1-butanone, α, α-dimethoxy-α-phenylacetophenone, 2,2-diethoxyacetophenone, 2-methyl-1--4- (methylthio) phenyl-2- (4-morpholinyl) -1- Propanone, 2-hydroxy-1--4- (hydroxy Butoxy), or the like phenyl-2-methyl-1-propanone.

  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. Resins or mixtures thereof; natural and modified, including pale, wood rosin glycerol ester, hydrogenated rosin glycerol ester, polymerized rosin glycerol ester, hydrogenated rosin pentaerythritol ester, and rosin phenol modified pentaerythritol ester Glycerol and pentaerythritol esters of modified rosins; copolymers and terpolymers of natural terpenes such as styrene / terpene and α-methylstyrene / terpene; generally at low temperatures, Friedel (Crafts) in the presence of a catalyst, polyterpene resins produced from the polymerization of terpene hydrocarbons such as bicyclic monoterpenes known as pinenes; further hydrogenated polyterpene resins; phenol-modified terpene resins and, for example, two Also included are hydrogenated derivatives thereof, such as resin products resulting from condensation of cyclic terpenes with phenol in acidic media; aliphatic petroleum hydrocarbon resins resulting from polymerization of monomers consisting primarily of olefins and diolefins; hydrogenation There are aliphatic petroleum hydrocarbon resins; and cyclic or acyclic C5 resins and aromatic modified acyclic or cyclic resins. The above may use 2 or more types together. A commercially available product is the trade name “ESCOREZ 5400” from Exxon. Examples of useful liquid adhesive resins include C5 liquid adhesive REGALITE R-10 with a softening point of 10.degree. C. available from Hercules, and softening available from Goodyear Chemical Co. There is a liquid hydrocarbon resin wing tack 10 with a point of 10 ° C.

  Furthermore, as an epoxy UV hot melt adhesive that can be used in the present invention, plasticity or a diluent may be blended in addition to the above components. For example, diluents such as olefin oligomers and low molecular weight polymers as well as plastic or bulk oils including plant and animal oils and their derivatives can be suitably used. Petroleum-derived oils are relatively high-boiling materials that contain only small amounts of aromatic hydrocarbons (preferably less than 30%, particularly preferably less than 15% of the oil weight). The oil may be completely non-aromatic. Suitable oligomers include polypropylene, polybutene, hydrogenated polyisoprene, hydrogenated polybutadiene and the like having an average molecular weight of about 350 to about 10,000. Examples of useful mineral oils include refined hydrocarbons such as paraffin, aromatic and naphthalene oils available under the trade names of KAYDOL from Witco, TUFFLO from Arco, etc. Contains oil.

  Moreover, you may contain petroleum induction paraffin. There are waxes such as petroleum derived paraffin or microcrystalline wax (including PACEMAKER 53 available from Citgo) to adjust the viscosity and raw strength of the final composition and reduce tack Therefore, it mix | blends suitably.

  Furthermore, polystyrene-polybutadiene-polystyrene, polystyrene-polyisoprene-polystyrene, poly (α-methyl-styrene) -polybutadiene-poly (α-methyl-styrene), poly (α-methyl-styrene) -polyisoprene-poly (α Suitable polymers such as block copolymers comprising -methyl-styrene), as well as their hydrogenated modifications such as, for example, polystyrene-poly (ethylene-butylene) -polystyrene, may be included. These copolymers are described, for example, in U.S. Pat. Nos. 3,239,478; 3,247,269; 3,700,633; 3,753,936 and 3,932,327. Can be prepared by For highly polar systems, polyesters that are also reactive to free radical systems (eg, DYNAPOL material available from Huls), and sulfonated polyesters (Eastman as AQ series) And non-reactive with acrylic polymers (ACRONAL AC205 and Acronal AC258 available from BASF) and free radical systems (such as available from Schenectady Chemical) Acrylic material. In addition, low vinyl content (<20%) or high vinyl content (> 20%), available under the trade name DURADENE from Firestone (these high vinyl copolymers are reactive) SBR random copolymers, which contribute to the crosslinking of the system; EPDM copolymers that can react through unsaturated sites into the polymer network, and saturated analogs that can modify the peelability and tackiness of the adhesive ( For example EP rubber); these are available from Exxon under the name VISTALON; butyl rubber, a copolymer of isoprene and isobutylene, available from Exxon Chemical under the name VISTANEX; Yo Liquid polyisopropylene such as that available from Kuraray, Inc. under the LIR trade name may be used.

  Moreover, in order to adjust a crosslinking density, Tg, a viscosity, and specific adhesive strength, you may use together the alcohol containing co-reactant for cationic hardening systems. Examples include polyester polyols available from Stepan Chemical Company and Dow Chemical; polyalkylene oxide polyols such as PEG and PPG available from Dow Chemical; and L-2203 available from Shell. Aliphatic diols (which are ethylene butylene diols); and ethylene butylene monool L-1203 available from Shell; polybutadiene polyols available from Atochem are also useful; epoxidized polybutadiene polyols are also useful It can be used as alcohol.

  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.

  As an example of the compounding quantity of the said component, 5-60 mass% epoxidized block copolymer, 20-85 mass% solid hydrogenation tackifier, 0.02-5 mass% cationic photoinitiator, 0-40 There is a mass% mineral oil, 0 to 40 mass% liquid tackifier and 0 to 3 mass% antioxidant.

  Also, 10-50% by weight epoxidized alicyclic base resin, 0.1-2.0% by weight cationic photoinitiator, 0-80% by weight solid or liquid polyester diol and 0-60% by weight There are polar tackifiers. A particularly useful radiation curable adhesive is a Contour ™ adhesive available from National Starch.

(I-3) Urethane-based UV hot-melt adhesive The urethane-based UV hot-melt adhesive in the present invention includes a urethane polymer, a photoinitiator, a tackifier, and the like. For example, an isocyanate group-containing acrylic polymer is used as the acrylic polymer in the acrylic UV hot-melt adhesive, and the acryloyl group-containing monomer is an isocyanate group-containing acrylate, preferably a urethane acrylate having two isocyanate groups. More preferably, urethane-based UV hot-melt adhesion can be achieved by using urethane acrylate and polyol having four isocyanate groups. In addition, for example, urethane-containing UV curable hot-melt adhesives described in JP 2006-188687 A, JP 2006-522178 A, JP 2003-507219 A, and the like can be used.

  The UV hot melt adhesive and / or the UV adhesive can shrink together with the shrink film without adversely affecting the appearance of the film and peeling off the article.

(Ii) UV adhesive The name of the UV adhesive is an adhesive or a pressure-sensitive adhesive if the peel strength before UV irradiation is 0.15 to 25 N / 15 mm or the shear strength is 2 to 85 N / 15 mm. It doesn't matter. Examples of UV adhesives that can be preferably used in the present invention include products manufactured by Nippon Synthetic Chemical Co., Ltd., trade names “Shikou” series, No-Tape Kogyo Co., Ltd., trade names “Acrytac” T series (UV curable adhesive), manufactured by ThreeBond Co. There are names “acrylic 3000” series, “epoxy” 3100 series, manufactured by Chemtech Chubu Co., Ltd., trade names “Chemical U-1395”, “Chemical U-1449E”, “Chemical U-1455B”, and the like.

  As the UV adhesive used in the present invention, an acrylic UV adhesive is preferably used. In addition, it is preferable that the thickness of an adhesive bond layer is 0.5-45 micrometers.

  The roll shrink label of the present invention uses the above-mentioned UV hot melt adhesive and / or UV adhesive, so that the peel strength between the labels, that is, between the ends of the labels on which the both ends of the label are overlapped with each other. Peel strength is 0.1 to 25 N / 15 mm, more preferably 2.0 to 10 N / 15 mm, and peel strength after UV irradiation is 0.5 to 30 N / 15 mm, more preferably 2.5 to 20 N / 15 mm. be able to. The shear strength between the labels is 0.8 to 60 N / 15 mm, more preferably 3.0 to 50 N / 15 mm, and the shear strength after UV irradiation is 2 to 65 N / 15 mm, more preferably 3.5 to 60 N / 15 mm.

  The peel strength between the container and the label, that is, the peel strength between the container and the label is 0.1 to 12 N / 15 mm, more preferably 1.0 to 8 N / 15 mm, and the peel strength after UV irradiation is 0.5 to It is 15N / 15mm, More preferably, it is 1.5-12N / 15mm. The shear strength between the container and the label is 0.8 to 35 N / 15 mm, more preferably 2.0 to 30 N / 15 mm, and the shear strength after UV irradiation is 2 to 40 N / 15 mm, more preferably 2. It is preferable that it is 5-35N / 15mm.

(4) Design printing layer The roll shrink label of this invention may have the printing layer laminated | stacked inside the label of a base film layer. In this case, the label inner side of the base film layer is not limited to the case of being formed in contact with the base film layer, and may be the innermost layer as long as it is inside the label from the base film layer. Moreover, in this invention, a printing layer may be formed over the full length of a roll shrink label, and it is not necessary to provide a design printing layer in an adhesive bond layer.

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

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

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

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

(5) Outer layer The roll shrink label of the present invention may further include an outer layer on the surface side of the base film layer. As such an outer layer, it can be appropriately selected depending on the use and design properties of the roll shrink label, and in the case of imparting the slipperiness of the label surface, the OP varnish is imparted when touching the label. It is preferable to use a printing layer made of suede ink and a mat OP for giving a mat 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.

(6) Surface Treatment In the present invention, prior to the formation of any layer of the roll 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) Roll Shrink Label Manufacturing Method As shown in FIG. 1 (b), the roll shrink label of the present invention has a design printing layer on the inside of the label of the base film layer, and as shown in FIG. 1 (c), When an outer layer is provided on the outer side of the label of the base film layer, it is convenient to previously form a design printing layer or an outer layer on the base film layer and then form an adhesive layer on the pasting portion. The outer layer can be formed by forming a design print layer on the base film layer and then inverting it and performing printing with, for example, OP varnish.

  In the roll shrink label of the present invention, the adhesive layer can be formed by a roll coater method using an direct roll or a gravure roll, an extrusion coater method, a slit orifice coater method, etc. There is no problem even if it is a construction method, and the solvent may be removed after dissolving and coating in a solvent. For example, in order to form an adhesive layer on the roll shrink label, the adhesive film coater or adhesive applicator is used on a laminated film in which a design printing layer or an outer layer has been previously formed on the base film layer, and UV hot melt bonding is performed. A method of applying the agent can be employed. In this case, in the present invention, the adhesive layer may be formed by cutting the roll shrink label raw roll into a predetermined size and then forming the adhesive layer, or forming the adhesive layer and then cutting into the predetermined size. Good.

(8) Container There is no restriction | limiting in particular as a container which can attach the roll shrink label of this invention, What is necessary is just a resin which can be adhere | attached with the said adhesive agent. Therefore, as an adherend to which the roll shrink label of the present invention is applied, glass containers; synthetic resin containers such as PET; inorganic containers such as ceramic bottles; metal containers such as aluminum, iron, and SUS; There are containers made of composite materials including resin, ceramic, metal, paper and the like.

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

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

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

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

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

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

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

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

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

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

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

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

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

  As a shape of the container, the container cross section of the 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. Rather, in the present invention, since the roll shrink label is applied to the container via the UV hot melt adhesive and / or the UV adhesive, at least one roll shrink label, preferably two or more roll shrink labels are provided on the body of the container. There is no limitation on the shape of the convex portion as long as it has a convex portion for adhesion, and in any case, the container with a roll shrink label can be efficiently produced. Therefore, as shown in FIG. 4, the container has a minimum peripheral diameter (minimum peripheral diameter × 100 / maximum peripheral diameter (%)) with respect to the maximum peripheral diameter in the roll shrink label bonding portion of the trunk portion, 50 to 100%. Preferably 70 to 90%, particularly preferably 75 to 85%, can be suitably used. In the present invention, the “roll shrink label adhering portion” means a container portion covered with the roll shrink label in the container 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 the label sticking apparatus, if the label can be bonded, wound, and fixed to the container by means of, for example, forming a slope corresponding to the difference in outer circumference or radius in the sticking drum, the present invention is limited to this. It is not a thing. However, if the minimum peripheral diameter / maximum peripheral diameter (%) is less than 50%, it is necessary to provide an inclination corresponding to the sticking drum, which is disadvantageous in that the apparatus is increased in size.

(9) Apparatus for manufacturing container with roll shrink label As an apparatus for manufacturing a container with roll shrink label in the present invention, a roll shrink label original roll which does not form an adhesive layer inside the roll shrink label is used, and the label is cut. It is preferable that the adhesive is applied later and then the label is attached to the container. When a UV adhesive layer is preliminarily formed inside the roll shrink label, a release paper is required, whereas when a UV hot melt adhesive layer is preliminarily formed, the UV hot melt adhesive is activated. This is because a heat-sensitive drum is required to make it easier, but if it is the above method, neither a release paper nor a heat-sensitive drum is required. Furthermore, if the applicator for applying the adhesive has a mechanism for scraping off the excessive applied adhesive, the amount of the adhesive can be reduced and the production efficiency can be further improved.

  That is, the label sticking apparatus of the present invention includes a sticking drum that transports at least the inside of the roll shrink label to the outside and sticks the roll shrink label to a container, and the roll shrink that is transported by the sticking drum. A label sticking device comprising a UV hot melt adhesive and / or an applicator for applying a UV adhesive inside the label, wherein the applicator applies a UV hot melt adhesive and / or a UV adhesive. A labeling device comprising a hot roll and an excessively applied UV hot-melt adhesive and / or a scraper that scrapes off the UV adhesive. Furthermore, it may be a label sticking device provided with a UV irradiation device for irradiating UV onto a container around which the roll shrink label is wound and fixed to cure the UV hot melt adhesive and / or the UV adhesive.

  An example which shows the suitable aspect of the label sticking apparatus of this invention is shown in FIG.

  The label sticking device of the present invention has, in addition to the sticking drum and the applicator, an original roll (110) supply unit, a label cutting device (150), a transfer drum (160), and a container supply unit (220). Further, a UV irradiation device (240) and a heat shrink device (250) may be provided.

  The raw roll (110) supply section includes a roll shrink label original roll (110), a plurality of tension rollers (130) for winding the tape (120) drawn from the original roll (110), and a drawer. An apparatus (140) is provided and the tape (120) drawn from the original roll (110) is maintained at a constant tension by the tension roller (130), and further comprises a pair of rollers. (140) and is continuously fed toward a cutting device (150) for cutting the tape (120) with a predetermined dimension.

  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 apparatus of the present invention, a negative pressure suction type transfer drum (160) and a sticking drum (180) are disposed adjacent to the cutting device (150) in a freely rotatable manner. 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 UV hot melt adhesive and / or a UV adhesive to the inside of the label (170) is provided. The applicator (200) is an adhesive roll (201) capable of supplying an adhesive to the roll surface. The adhesive roll (201) may be a direct roll or a gravure roll.

  When the 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), an adhesive layer can be formed on the label (170). 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).

  When the adhesive is a hot melt adhesive, a heating mechanism is built in the adhesive roll (201), and the hot melt adhesive heated to a predetermined temperature is applied to the label (170). It may be. 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.

In the present invention, it is preferable that the applicator (200) is further provided with a UV hot-melt adhesive and / or a scraper (210) that scrapes off the UV adhesive on the inside of the label (170). . For example, the scraper (210) can control the adhesive to ² to 20 g / m ² or the coating thickness of 1 to 40 μm on a label having a height of 100 mm, thereby reducing the consumption of the adhesive.

  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).

  In the present invention, 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 can be formed only on the start end sticking portion and the end end sticking portion.

  The label (170) on which the adhesive layer is formed is transferred toward the sticking point of the container (190) by the rotation of the sticking drum (180).

  In the present invention, 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 said conveying apparatus (220) becomes a structure which can rotate a container (190) forcibly 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 sticking part is bonded via the adhesive layer of the terminal sticking part.

  When winding and fixing of the label (170) by the sticking drum (180) are completed, the labeled container (230) is transferred to the UV irradiation device (240) by the transport device (220). The UV hot-melt adhesive and the UV adhesive are cured while the labeled container (230) is transferred to the next process while receiving UV irradiation in the UV irradiation device (240).

  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.

  In this invention, you may have a heat contraction apparatus (250) following a UV irradiation apparatus (240). When the label (170) is a roll shrink label, it is transferred to a heating / shrinking device (250) and heated by a predetermined temperature, for example, hot air of 60 to 220 ° C, steam heated by steam and steam, or infrared rays. Apply radiant heat. Thereby, the roll shrink label can be highly shrunk in the circumferential direction, and a container in which the body of the container is covered with the roll shrink label can be manufactured.

  As described above, the present invention is characterized by including the specific applicator (200). The applicator (200) may have at least one adhesive roll (201), but there may be a plurality. May be. 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.

(10) Manufacturing method of container with roll shrink label In the present invention, a roll shrink label is attached to the container via a UV hot melt adhesive and / or UV adhesive, and then the UV is irradiated to cure the adhesive. The method is not particularly limited as long as the roll shrink label can be wound and fixed around the entire circumference of the container, and may be manually attached to the container. On the other hand, when using a label sticking apparatus, it is preferable to use the label sticking apparatus.

  When using the label sticking device of the present invention, a roll shrink label original roll (110) before forming the adhesive layer is mounted on the original roll supply section. The tape (120) pulled out from the original roll (110) is transferred to the cutting device (150) through the drawing device (140) while maintaining the tension constant by the tension roller (130).

  In the cutting device (150), the tape (120) is cut into a predetermined size, transferred to the sticking drum (180) via the transfer drum (160) in the vicinity of the cutting device (150), and the sticking drum (180). UV hot melt adhesive or UV adhesive is applied by an applicator (200) disposed relative to), and excess adhesive is recovered by a scraper (210).

  The label (170) on which the adhesive layer is formed is transferred toward the sticking point of the container (190) by the rotation of the sticking drum (180), and comes into contact with the container (190) supplied by the transport device (220). The label (170) is then glued, wound and secured to the container (190). 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 winding and fixing of the label (170) by the sticking drum (180) are completed, the labeled container (230) is transferred to the UV irradiation device (240) by the transport device (220).

In the present invention, the labeled container (230) is irradiated with 30 to 500 mJ / cm ² of UV as an integrated light amount to cure the adhesive layer included in the pasting 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.

  Subsequently, it transfers to a heat shrink 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 highly shrunk in the circumferential direction, and a container in which the body of the container is covered with the roll shrink label can be manufactured.

  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
Design printed layer on the surface of MD direction uniaxially stretched polyethylene terephthalate (trade name “PTRN” manufactured by CI Kasei Co., Ltd .; MD direction maximum heat shrinkage rate 48%, TD direction maximum heat shrinkage rate 8%) at 50 ° C. Was applied in multiple rows, and this was used as a raw roll.

  Using the label attaching device shown in FIG. 2, the above-mentioned raw roll is mounted, and a UV hot melt adhesive (trade name “UV Acrimet”, manufactured by Notape Co., Ltd.) is supplied as an adhesive to be used for the attachment portions at both ends of the label. As a container, a PET bottle having irregularities in the height direction on the outer periphery of the container shown in FIG. 4 and having a smooth bottle surface was conveyed, and a label was adhered, wound, and fixed to the container. Specifically, the UV hot-melt adhesive is heated and melted at 120 ° C. in the applicator of the label attaching device, and applied to the label attaching portion, and this label is roll-shrinked to the label attaching portion of the container. Both were adhered by pressing from the outer surface of the label. Subsequently, the label remainder was wound around the PET bottle body, and the label end pasting part was brought into contact with and adhered to the surface of the starting end pasting part. The peel strength between the label and the label is 1.3 N / 15 mm, the peel strength between the container and the label is 1.2 N / 15 mm, and the shear strength between the label and the label is 4.1 N / 15 mm. The shear strength between the labels was 3.8 N / 15 mm.

  Next, as shown in FIG. 5, the container around which the label was wound was irradiated with ultraviolet rays at 1000 bpm in an ultraviolet tunnel (UV irradiation device) to cure the adhesive. The peel strength between the label and the label is 2.5 N / 15 mm, the peel strength between the container and the label is 2.2 N / 15 mm, and the shear strength between the label and the label is 4.6 N / 15 mm. The shear strength between the labels was 4.3 N / 15 mm.

  Subsequently, the steam shrink tunnel (heat shrinkage device) was passed at 85 to 95 ° C. to fit the label into the container shape, and a container with a roll shrink label was produced.

  The obtained container with a roll shrink label was subjected to a heat shrinking process, but the softening and melting of the UV hot melt adhesive layer was not observed, and the label was not detached.

  For the peel strength, the test piece was cut out to 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 (Orientec), and evaluated by peel 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.

Comparative Example 1
Except for using a hot melt adhesive (trade name “Label Melt, BL-8001” manufactured by Toyo Petrolite Co., Ltd.) as the adhesive layer of the label affixing part and not performing ultraviolet irradiation in an ultraviolet tunnel. In the same manner as in Example 1, a container with a roll shrink label was produced.

  As a result, the hot melt agent softened when passing through the steam tunnel, the bonded portion peeled off, the label contracted, and the label dropped off.

  Since the roll shrink label according to the present invention uses a UV hot melt adhesive or UV adhesive, the adhesive layer is not melted under heating conditions, has an excellent appearance, and has a roll shrink label container at high speed. It can be manufactured and is useful.

Fig.1 (a)-(c) is a cross-sectional view explaining the roll shrink label used by this invention. It is a figure which shows an example of a structure of the label sticking apparatus of this invention. It is a figure which shows the adhesive agent application mechanism and adhesive agent scraping mechanism of the label sticking apparatus of this invention. It is a container that can be used in the present invention, and a concave portion having a minimum peripheral diameter (minimum peripheral diameter × 100 / maximum peripheral diameter (%)) with respect to a maximum peripheral diameter in a roll shrink label bonding portion of a trunk portion is 50 to 100% It is a figure explaining what has. It is a figure which shows the state which irradiates UV shown by <-from the right side of drawing after sticking, winding, and fixing the roll shrink label of this invention to the container shown in FIG.

Explanation of symbols

10 ... Antistatic agent layer,
20 ... adhesive layer,
30 ... Design printing layer,
40 ... outer layer,
W, W1, W2, W3 ... pasting part,
110 ... Original fabric roll,
120 ... tape,
130: Tension roller,
140 ... drawer device,
150 ... label cutting device,
160 ... transfer drum,
170 ... label,
180 ... sticking drum,
190 ... container,
200 ... applicator,
201, 203 ... adhesive roll,
205 ... Auxiliary roll,
210 ... scrapper,
220 ... Conveying device,
230 ... Container with label,
240 ... UV irradiation device,
250: Heat shrinkage device.

Claims (15)

It is a roll shrink label that is wound around the outer peripheral surface of the body of the container.
It consists of a base film layer and an adhesive layer provided at least at both ends of the label,
The roll shrink label, wherein the adhesive layer is a UV hot melt adhesive and / or a UV adhesive.   The roll shrink label according to claim 1, wherein the UV hot-melt adhesive is an acrylic UV hot-melt adhesive, a urethane UV hot-melt adhesive, or an epoxy UV hot-melt adhesive.   The roll shrink label according to claim 1, wherein the UV adhesive is an acrylic UV adhesive or an epoxy UV adhesive.   The base film layer includes a stretched polyester film, a stretched polystyrene film, a stretched polyolefin film, a polylactic acid film, a foamed polyolefin film, a foamed polystyrene film, a laminate film of a nonwoven fabric and a shrink film, and a stretched polyester-polystyrene. The roll shrink label in any one of Claims 1-3 which is 1 or more types of stretched films selected from the group which consists of a coextrusion film.   The roll shrink label according to any one of claims 1 to 4, wherein a design print layer is further laminated on the inside of the label of the base film layer.   The UV hot-melt adhesive and / or the UV adhesive has a peel strength before UV irradiation between labels of 0.1 to 25 N / 15 mm, and a peel strength after UV irradiation of 0.5 to 30 N / The roll shrink label in any one of Claims 1-5 which is 15 mm.   The roll shrink label according to any one of claims 1 to 6, wherein the base film layer is further laminated with an outer layer on the label surface side of the base film layer.   A container with a roll shrink label, wherein the roll shrink label according to claim 1 is attached to the container.   The container has a recess having a minimum peripheral diameter (minimum peripheral diameter × 100 / maximum peripheral diameter (%)) with respect to the maximum peripheral diameter in the roll shrink label adhesion portion of the trunk part, which is 50 to 100%. A container with a roll shrink label according to claim 8.   The roll shrink label according to claim 8 or 9, wherein the peel strength before UV irradiation between the label and the container is 0.1 to 12 N / 15 mm, and the peel strength after UV irradiation is 0.5 to 15 N / 15 mm. With container. Forming a UV hot-melt adhesive layer and / or a UV adhesive layer on the start and end portions of the inside of the roll shrink label including at least the base film layer,
A step of adhering the container and the starting adhesive layer of the roll shrink label;
Wrapping the remainder of the roll shrink label around the outer periphery of the container;
Adhering the terminal adhesive layer and the label start end,
A roll including a step of irradiating the container on which the roll shrink label is wound and fixed with UV to cure the adhesive layer included in the sticking part, and a step of applying heat to the container to shrink the label Manufacturing method of container with shrink label.   The manufacturing method of the container with a roll shrink label of Claim 11 including the process of heating at the temperature of 60-220 degreeC following the said hardening process, and heat shrinking the said roll shrink label. An adhesive drum that conveys the inside of the roll shrink label toward the outside and adheres the roll shrink label to a container; a UV hot melt adhesive on the inside of the roll shrink label that is conveyed by the adhesive drum; And / or an applicator for applying a UV adhesive,
The applicator has a UV hot melt adhesive and / or an adhesive roll for applying the UV adhesive, and a scraper that scrapes off the excessively applied UV hot melt adhesive and / or the UV adhesive. A labeling device that is characterized. An adhesive drum that conveys the inside of the roll shrink label toward the outside and adheres the roll shrink label to a container; a UV hot melt adhesive on the inside of the roll shrink label that is conveyed by the adhesive drum; A labeling device comprising an applicator for applying a UV adhesive and a UV irradiation device,
The label application according to claim 13, wherein the UV irradiation device is configured to irradiate UV onto a container around which the roll shrink label is wound and fixed to cure the UV hot melt adhesive and / or the UV adhesive. apparatus.   The label sticking device according to claim 14, further comprising a heat shrink device after the UV irradiation device.

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