JP2019038562A - Method for manufacturing labeled container and labeled container - Google Patents

Abstract

To provide a method for manufacturing a labeled container which can suppress the contact of a cylindrical label before contraction fitted onto a barrel of a container body with a bonding part installed on the outer periphery of the barrel, in which the barrel and the cylindrical label are joined via the bonding part provided in advance on the outer periphery of the barrel, when loading the cylindrical label on the barrel of the container body.SOLUTION: A method for manufacturing a labeled container has: a label fitting step which fits a cylindrical label onto a barrel 22 of a cup-shaped container body 20 having the barrel 22 in which an opening part is larger than a bottom part 24; and a heating step which fits the cylindrical label onto the barrel 22, by heating and thermally shrinking the cylindrical label. A recess portion 26 is formed on the outer periphery of the barrel 22. A bonding part 40 having thickness smaller than the depth of the recess portion 26 is formed in the recess portion 26. The cylindrical label which has been inserted into the recess portion 26 and the bonding part 40 are joined in the heating step.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for manufacturing a labeled container in which a cylindrical label is mounted on the outer periphery of a container body, and the labeled container.

  2. Description of the Related Art Conventionally, as a container for storing beverages or foods, there is a cup-shaped container whose upper end opening is larger than the bottom. The outer periphery of such a container is covered with a cylindrical shrink label, and then the container covered with the label is passed through a heating device such as a heat tunnel so that the label is thermally contracted and brought into close contact with the container. There is known a method for manufacturing a labeled container, in which a label is attached to the container.

  At this time, since the barrel of the container body is tapered, an adhesive layer is provided between the outer peripheral surface of the barrel of the container body and the cylindrical label to prevent the mounted cylindrical label from falling. Techniques for joining are known. Also, with this technology, when a shrink label before shrinkage is attached to the body of the container body, it is possible to prevent the label from slipping down before being completely heat-shrinked and shifting the attachment position. Become. As a method of joining the body portion of the container body and the label, for example, a method in which an adhesive layer is previously provided on the cylindrical label by delayed coating or the like, and the activated adhesive layer and the body portion of the container body are adhered, There is known a method in which an adhesive layer is provided in advance on the outer peripheral surface of the body portion of the container body, and the activated adhesive layer is adhered to the label.

  For example, Patent Document 1 discloses a label-attached container in which a cylindrical shrink label is attached to a body portion of a container body, and the shrink label is formed on the outer peripheral surface of the body portion of the container body. There is described a labeled container attached to a container body through an adhesive layer having a thickness of 10 to 40 μm.

JP 2001-88839 A

  By the way, after forming an adhesive layer made of a hot melt adhesive or the like on the outer peripheral surface of the body of the container body, when the cylindrical shrink label is put on the body of the container body, the inner diameter of the shrink label before shrinkage is usually It is set slightly larger than the outer diameter of the body of the container body. Therefore, depending on the adhesiveness of the formed adhesive layer, the cylindrical label before shrinkage may adhere to the adhesive layer, and the situation where the cylindrical label cannot be smoothly fitted to the body portion, A situation may occur in which the position deviates from the desired position. Therefore, it is conceivable to secure a cooling time until the adhesiveness of the adhesive layer is reduced to some extent, but the longer cooling time has a significant effect on the case where the cylindrical label is attached to the container body at a high speed. It becomes. Moreover, the problem that the choice of the adhesive agent to be used is restrict | limited from a sticky viewpoint may also arise.

  Therefore, the present invention provides a label that joins the barrel and the cylindrical label via an adhesive portion provided in advance on the outer peripheral surface of the barrel of the container body when the cylindrical label is attached to the barrel of the container body. In the manufacturing method of a container, the manufacturing method of the labeled container which can suppress the contact to the adhesion part provided in the outer peripheral surface of the trunk | drum of the cylindrical label before shrink | fitting fitted to a trunk | drum is provided. With the goal.

  The method for manufacturing a labeled container according to the present invention includes a label fitting process for fitting a cylindrical label on a barrel portion of a cup-shaped container body having a trunk portion whose opening is larger than the bottom portion, and a cylindrical label. A heating step of heating and heat shrinking and mounting a cylindrical label on the barrel, and a recess is provided on the outer peripheral surface of the barrel, and the recess has a thickness smaller than the depth of the recess. In the heating step, the cylindrical label that has entered the concave portion and the adhesive portion are bonded to each other.

  In a preferred aspect, the adhesive portion is formed at a position facing the upper end portion of the cylindrical label on the outer peripheral surface of the trunk portion.

  In another preferred aspect, the adhesive portion is formed at the upper end portion of the outer peripheral surface of the trunk portion.

  In another preferable aspect, the depth of the concave portion is 0.5 mm or less.

  In another preferred embodiment, a plurality of dotted adhesive portions are arranged side by side in the circumferential direction of the outer peripheral surface of the body portion.

  In another preferred aspect, the plurality of adhesive portions are arranged uniformly along the circumferential direction of the outer peripheral surface of the body portion.

  In another preferred embodiment, the adhesive portion is formed of a hot melt adhesive.

  In another preferred aspect, the method further includes an adhesive portion forming step of forming the adhesive portion by injecting a hot melt adhesive toward the concave portion using a hot melt gun.

  The container with a label of the present invention has a cup-shaped container body having a body portion whose opening is larger than the bottom portion, a cylindrical label attached to the body portion of the container body, and an outer peripheral surface of the body portion of the container body. And an adhesive part for joining the cylindrical label, and a recess is provided on the outer peripheral surface of the body part of the container body. The adhesive part is formed in the recess and has a thickness smaller than the depth of the recess. It is characterized by that.

  In a preferred aspect, the adhesive portion is formed at a position facing the upper end portion of the cylindrical label on the outer peripheral surface of the trunk portion.

  In another preferred aspect, the adhesive portion is formed at the upper end portion of the outer peripheral surface of the trunk portion.

  In another preferable aspect, the depth of the concave portion is 0.5 mm or less.

  In another preferred embodiment, a plurality of dotted adhesive portions are arranged side by side in the circumferential direction of the outer peripheral surface of the body portion.

  In another preferred aspect, the plurality of adhesive portions are arranged uniformly along the circumferential direction of the outer peripheral surface of the body portion.

  In another preferred embodiment, the adhesive portion is formed of a hot melt adhesive.

  According to the present invention, when a cylindrical label is attached to a body part, the production of a labeled container in which the body part and the cylindrical label are joined via an adhesive part provided in advance on the outer peripheral surface of the body part of the container body. In the method, it is possible to suppress contact between the adhesive portion provided in advance on the outer peripheral surface of the body portion and the cylindrical label before contraction.

It is the front view which notched a part which shows the structure of the container with a label. It is a front view which shows the container main body of the container with a label. It is an expanded sectional view which shows the structure of A part of FIG. It is the schematic which shows the other example of the adhesion part formed in the trunk | drum of a container main body. It is explanatory drawing which shows 1 process of the manufacturing method of a labeled container. It is a front view which shows the other example of a container main body.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a labeled container 10 according to this embodiment. The labeled container 10 includes a cup-shaped container body 20 and a cylindrical label 30 attached to the body portion 22 of the container body 20. FIG. 2 shows a container body 20 according to the present embodiment. As shown in FIG. 2, a concave portion 26 is formed on the outer peripheral surface of the barrel portion 22 of the container body 20, and an adhesive portion 40 that joins the barrel portion 22 and the cylindrical label 30 is provided in the concave portion 26. . The contents accommodated in the labeled container 10 of the present embodiment are not particularly limited, and examples thereof include various foods and drinks, sanitary goods, pharmaceuticals, toys, and machine parts.

  A container main body 20 shown in FIG. 2 includes a tapered barrel portion 22 having an upper end opening larger than the bottom portion 24 and a bottom portion 24 connected to the lower end portion of the barrel portion 22. The upper end opening of the body portion 22 is larger than the bottom portion 24, that is, has a wide opening area as compared with the area of the bottom portion 24. The body portion 22 is provided with a flange portion 23 that protrudes radially outward from the upper end edge of the body portion 22.

  In the present specification, the direction along the central axis of the body portion 22 is described as “vertical direction”, the side of the container body 20 on which the opening is provided is described as “upper”, and the bottom portion 24 of the container body 20 is described. The side provided with is described as “lower” or the like. The “radial direction” means a direction orthogonal to the central axis of the body part 22, and the “circumferential direction” means a direction along the outer peripheral surface of the body part 22, that is, the central axis of the body part 22. It means the direction orthogonal to the radial direction in the orthogonal plane. In addition, description of the direction in this specification aims at the convenience of explanation, Comprising: The relationship between each component of this embodiment and a direction is not limited.

  The molding method of the container body 20 is not limited, and a known method such as a sheet molding method in which a thermoplastic plastic sheet is formed by vacuum molding or pressure molding, or an injection molding method in which a thermoplastic plastic is injection molded may be applied. When the container body 20 is manufactured by a sheet molding method, for example, a single layer sheet such as polypropylene or polystyrene, a multilayer sheet obtained by laminating a gas barrier resin layer such as an ethylene vinyl alcohol copolymer on the single layer sheet, and heat insulation What is necessary is just to manufacture the container main body 20 using the sheet | seat made from a foaming resin etc. which have property. Further, when the container body 20 is manufactured by an injection molding method, a thermoplastic plastic such as polypropylene may be used. Moreover, the material which comprises the container main body 20 is not limited to a thermoplastic, For example, the container comprised with paper, a metal, etc. may be sufficient.

  FIG. 3 is an enlarged cross-sectional view showing the structure of the portion A in the container body 20 shown in FIG. In the labeled container 10 of the present embodiment, as shown in FIG. 3, a concave portion 26 is formed on the outer peripheral surface of the trunk portion 22 of the container body 20, and the trunk portion 22, the cylindrical label 30, and the inner space of the concave portion 26 are formed. An adhesive portion 40 is provided to join the two. The bonding portion 40 provided in the recess 26 has a thickness T that is smaller than the depth D of the recess 26. As shown in FIG. 3, the depth D of the recess 26 and the thickness T of the bonding portion 40 are lengths along the radial direction of the body portion 22.

  In the present embodiment, the bonding portion 40 provided in the internal space of the recess 26 has a thickness T smaller than the depth D of the recess 26, and the bonding portion 40 does not exceed the opening end surface of the recess 26. It is formed as follows. As a result, when the cylindrical label 30 is fitted on the barrel portion 22, the cylindrical label 30 that moves along the outer peripheral surface of the barrel portion 22 does not contact the adhesive portion 40 at all or almost. Therefore, when the cylindrical label 30 is fitted, the adhesive layer formed on the outer peripheral surface and the cylindrical label 30 before shrinkage adhere to each other, and the possibility of hindering smooth fitting or the The possibility of occurrence of misalignment can be significantly reduced.

  Hereinafter, the concave portion 26 and the bonding portion 40 provided in the body portion 22 will be described in more detail.

  In the present embodiment, the concave portion 26 has a groove shape in which the opening end extends in a band shape along the circumferential direction of the outer peripheral surface of the body portion 22. The radial cross-sectional shape of the concave portion 26 (hereinafter also referred to as “the cross-sectional shape of the concave portion 26”) has a depth larger than the thickness T of the bonding portion 40 as shown in FIG. The concave portion 26 has the same rectangular cross-sectional shape formed over the entire circumference in the circumferential direction. The cross-sectional shape of the recess 26 is not particularly limited as long as the adhesive part 40 having a thickness T smaller than the depth D can be formed, and the heat-shrinkable cylindrical label 30 has an open end that can enter the internal space. What is necessary is just to set suitably according to the shaping | molding method of the container main body 20, the shrinkage | contraction ratio of the cylindrical label 30, the formation method of the adhesion part 40, etc. FIG.

  The depth D of the recess 26 is, for example, not less than 0.1 mm and not more than 0.5 mm, and preferably not less than 0.3 mm and not more than 0.4 mm. If the depth D of the concave portion 26 is too shallow, it is difficult to form the bonding portion 40 having a thickness T smaller than the depth D. Moreover, when the depth D of the recessed part 26 is too deep, there exists a possibility that formation of the recessed part 26 by vacuum forming may become difficult, for example. In the labeled container 10 of the present embodiment, the concave portion 26 having a rectangular cross-sectional shape is provided. The cross-sectional shape of the concave portion 26 is, for example, a V shape, a U shape, an arc shape, or the like. Also good.

  In the present embodiment, the recess 26 has a band-shaped opening end extending in the circumferential direction. Thereby, when fitting the cylindrical label 30 to the trunk | drum 22, it can prevent generation | occurrence | production of the situation where the upper end edge of the cylindrical label 30 enters the inside of the recessed part 26, and adheres to the adhesion part 40. FIG. When the recess 26 has a band-shaped opening end, the width (length in the vertical direction) of the opening end may be, for example, 1.5 mm or more and 5 mm or less, and preferably 2.5 mm or more and 4 mm or less. If the width of the opening end of the recess 26 is too narrow, depending on the material of the cylindrical label 30, the heating method, etc., the heat-shrinkable cylindrical label 30 cannot sufficiently enter the internal space of the recess 26 and adhere to the adhesive portion 40. In addition, there is a risk of insufficient bonding. If the width of the opening end of the recess 26 is too wide, the tubular label 30 and the adhesive portion 40 may adhere when the tubular label 30 is fitted to the body portion 22 as described above.

  The bonding portion 40 is formed in the internal space of the recess 26 and has a thickness T that is smaller than the depth D of the recess 26. In the present embodiment, in order to join the adhesive portion 40 to the upper end portion of the cylindrical label 30, the concave portion 26 is provided at a position facing the upper end portion of the cylindrical label 30 on the outer peripheral surface of the body portion 22 to form the adhesive portion 40. doing. In this way, by forming the adhesive portion 40 at a position facing the upper end portion of the cylindrical label 30 on the outer peripheral surface of the body portion 22, the upper end portion of the cylindrical label 30 is downward with respect to the intended mounting position. The phenomenon of shifting can be prevented.

  In addition, even at a location where the outer diameter of the container body 20 is maximized, a phenomenon in which the thermally contracted cylindrical label 30 is shifted downward with respect to the intended mounting position of the body portion 22 is likely to occur. Therefore, in the container main body 20 of the present embodiment, that is, in the container main body 20 of the present embodiment, the adhesive portion 40 is disposed at the upper end portion of the outer peripheral surface of the container main body 20, so that the tubular shape at the time of heat shrinkage is provided. The phenomenon that the label 30 is shifted downward with respect to the intended mounting position can be suppressed. The position of the adhesive portion 40 from the upper end edge of the trunk portion 22 may be appropriately selected depending on the shape of the container body 20, the material of the cylindrical label 30, the heating method for thermally shrinking the cylindrical label 30, and the like. The upper end edge of 22 to the upper end edge of the recess 26 may be within 8 mm, preferably within 6 mm. Arrangement | positioning of the adhesion part 40 is not limited to the upper end part of the trunk | drum 22, For example, you may form in the center part of the trunk | drum 22 of the container main body 20, or the lower part.

  In the container main body 20 shown in FIG. 2, a plurality of adhesive portions 40 formed in a dot shape are arranged at equal intervals along the circumferential direction in the recess 26 provided in a belt shape over the entire circumference in the circumferential direction of the body portion 22. Is arranged. In addition, the shape and arrangement | positioning of the adhesion part 40 are not limited to what has a dot pattern in which the several dotted | punctate adhesion part 40 is arrange | positioned along with. FIG. 4 shows an example of the container body 20 in which the adhesive portion 40 having a shape other than the dot pattern is formed in the concave portion 26. In the labeled container 10 of the present embodiment, for example, a plurality of linear adhesive portions 41 may be intermittently formed as shown in FIG. 4A, and a strip-like shape as shown in FIG. You may form the adhesion part 42 in the perimeter of the circumferential direction. In the case of forming a dot pattern in which a plurality of dot-like adhesive portions 40 are arranged, it is preferable because the amount of adhesive used can be reduced while generally maintaining the bonding force between the body portion 22 and the cylindrical label 30.

  When a plurality of adhesive portions 40 are formed along the circumferential direction of the body portion 22 and there is a section where the interval between the adhesive portions 40 is wider than the others, when the cylindrical label 30 is thermally contracted, the cylindrical label 30 There is a possibility that the upper end edge of the rim is relatively large in the section. Therefore, when forming the some adhesion part 40, as shown to FIG.2 and FIG.4 (a), it is preferable to arrange | position the some adhesion part 40 along the circumferential direction of the trunk | drum 22 at equal intervals.

  In addition, after forming the adhesive layer on the cylindrical label side, the label having the adhesive layer is fitted on the body of the container, the cylindrical label is heated and thermally contracted, and at the same time the adhesive is activated, A method is known in which the body portion of a container and a label are joined via an adhesive. Here, when the adhesive layer is formed on the cylindrical label side, usually, after the adhesive is applied to the sheet-like label base material, both end portions of the label base material are overlapped or the both end portions are predetermined. A cylindrical label is formed by covering with a width tape. Therefore, an adhesive layer is not formed on the center seal portion where both ends of the label base material are connected to the inner peripheral surface of the cylindrical label, and when the cylindrical label is thermally contracted, the upper end of the center seal portion There may be a relatively large shrinkage at the edges. On the other hand, in the present embodiment, as described above, a plurality of adhesive portions 40 arranged at equal intervals along the circumferential direction of the body portion 22 of the container body 20, or an adhesive portion that is continuous over the entire circumference in the circumferential direction. 40 can be formed, and partial shrinkage at the upper edge of the cylindrical label 30 can be prevented.

  The adhesive constituting the adhesive portion 40 (including what is generally referred to as a pressure-sensitive adhesive) is a composition that can be joined to the cylindrical label 30 in the thermal contraction process in which the cylindrical label 30 is thermally contracted. There is no particular limitation. For example, a heat-sensitive adhesive that is solid at room temperature and melts by heating to improve (activate) viscosity may be used. Examples of the heat-sensitive adhesive that can be used for the bonding portion 40 include a hot melt adhesive, a part coat adhesive, and a delayed tack adhesive. Examples of the adhesive other than the heat-sensitive adhesive that can be used for the adhesive portion 40 include a steam-reactive adhesive containing polyurethane.

  Examples of hot melt adhesives include additives such as tackifiers to base resins such as ethylene resins such as ethylene-vinyl acetate copolymers and ethylene acrylic acid copolymers, and styrene-butadiene block copolymers. What was blended is mentioned. Examples of the tackifier include rosin resin, terpene resin, petroleum resin, phenol resin and the like. The hot melt adhesive preferably uses a base resin that has a relatively small yellow coloration in order to prevent the cylindrical label 30 from being shown on the display print layer. The hot melt adhesive can be applied to the concave portion 26 using a known means such as a hot melt gun, roller coating, melt extrusion coating, or the like. The shape of the bonding part 40 can be easily controlled, and in particular, since the spot-like bonding part 40 can be easily formed, it is preferable to form the bonding part 40 by injecting a hot melt adhesive using a hot melt gun. .

  For example, the adhesive constituting the bonding portion 40 preferably has a viscosity at 160 ° C. of 700 mPa · s to 2000 mPa · s, and more preferably 700 mPa · s to 1500 mPa · s. This is because an adhesive having a viscosity at 160 ° C. in the above range is more excellent in the function of adhering to the cylindrical label 30 in the heating process.

  In the labeled container 10, after the adhesive that joins the body portion 22 and the cylindrical label 30 is formed in the recess 26, the adhesive portion 40 of the present embodiment joined to the cylindrical label 30 during heat shrinkage is configured. Whether or not it may be determined by the following method, for example. The cylindrical label is peeled from the labeled container, and it is observed whether the adhesive layer remains on the container main body or the cylindrical label. When the adhesive layer remains in the internal space of the recessed portion 26 of the labeled container, it can be determined that the adhesive layer is likely to constitute the adhesive portion 40 according to the present embodiment. Moreover, it can discriminate | determine by peeling the cylindrical label 30 from the container 10 with a label, and confirming arrangement | positioning of an adhesive bond layer. As described above, when the adhesive layer is formed at regular intervals along the circumferential direction of the body portion 22 or continuously over the entire circumference in the circumferential direction, the adhesive layer is the adhesive portion of the present embodiment. 40 can be determined. On the other hand, when the adhesive layer is not formed in the section corresponding to the center seal portion of the cylindrical label, the adhesive layer may not be the adhesive portion 40 of the present embodiment.

  The cylindrical label 30 is formed in a cylindrical shape and is attached to at least a part of the trunk portion 22 of the container body 20. The cylindrical label 30 may be formed by, for example, stacking both ends of a heat-shrinkable sheet-shaped label body on each other and bonding them with an adhesive or the like, or butting both end edges of the label body together. It is produced by sticking a tape having a predetermined width having heat shrinkability to the mating portion. The orientation of the label main body and the tape constituting the cylindrical label 30 is adjusted so as to mainly heat shrink along the circumferential direction according to the heat shrinkability of each material.

  The label main body includes, for example, a transparent label base material formed of a heat-shrinkable film, and a display print layer that is formed on the inner surface of the label base material and displays a trade name, a trademark, a component, various designs, and the like. It is configured. The label base material should just be a heat-shrinkable film manufactured with the well-known material which has heat-shrinkability. Examples of the material constituting the heat-shrinkable film include polystyrene resins such as styrene butadiene copolymer, polyester resins such as polyethylene terephthalate, polyvinyl chloride, and polypropylene. The thickness of the label substrate may be, for example, 15 μm or more and 80 μm or less. The heat shrinkage rate of the heat shrinkable film is not particularly limited. For example, a heat shrinkable film having a heat shrinkage rate of 40% to 80% in the circumferential direction when immersed in warm water at 80 ° C. for 10 seconds is used. do it.

  The display printing layer is formed by, for example, gravure printing, flexographic printing, offset printing, screen printing, relief printing printing, and the like. When an adhesive layer is formed on a cylindrical label, and the body portion of the container body and the cylindrical label are joined by the adhesive layer, it is usually water-soluble using a printing machine used for forming a display printing layer of the label base material. In many cases, an adhesive layer or the like is applied to a label substrate to form the adhesive layer. Therefore, when an adhesive layer is formed on a cylindrical label using a printing press, the number of colors of display print layers that can be formed is reduced. On the other hand, in this embodiment, since the adhesive portion 40 is provided at a specific location on the container body 20 side, a display that can be formed by the same printing machine as compared with the case where the adhesive layer is formed on the cylindrical label. The number of colors in the print layer can be increased.

  An example of a method for manufacturing the labeled container 10 using the container main body 20 and the cylindrical label 30 will be described with reference to FIGS. 1, 2, and 5.

  First, the adhesion part formation process which forms the adhesion part 40 in the recessed part 26 provided in the outer peripheral surface of the trunk | drum 22 of the container main body 20 is performed, and the container main body 20 as shown in FIG. 2 is manufactured. In the bonding portion forming step, a hot melt adhesive in a molten state is injected using a hot melt gun to form a plurality of dot-shaped bonding portions 40 that are evenly arranged along the circumferential direction. At this time, each adhesive portion 40 does not scatter after the injected adhesive has landed on the bottom surface of the recess 26 so that the thickness T from the bottom surface of the recess 26 is smaller than the depth D of the recess 26. As described above, the injection speed of the hot melt gun, the viscosity of the adhesive, and the like are adjusted. In the present embodiment, since the belt-like recesses 26 are provided over the entire circumference of the body 22, the dot pattern is different from the case where a plurality of recesses 26 are provided intermittently along the circumference of the body 22. When forming the plurality of adhesive portions 40 having the above, it is not necessary to perform circumferential alignment between the injection position of the adhesive in the hot melt gun and the position of the concave portion 26.

  In the label fitting step, as shown in FIG. 5, the cylindrical label 30 is fitted from the bottom 24 side along the outer peripheral surface of the body portion 22 of the container body 20. In the present embodiment, the bonding portion 40 is formed in the internal space of the recess 26 that is recessed from the outer peripheral surface of the body portion 22 of the container body 20, and does not exceed the opening end of the recess 26. Therefore, when the cylindrical label 30 is fitted on the outer peripheral surface of the trunk portion 22, even if the inner diameter of the cylindrical label 30 is slightly larger than the outer diameter of the barrel portion 22, Almost no contact with the label 30 occurs. Therefore, when the cylindrical label 30 is fitted on the body portion 22, even if the adhesive portion 40 has adhesiveness, the adhesive portion 40 does not adhere to the cylindrical label 30, and the cylindrical label 30 can be smoothly smoothed. Can be fitted. Therefore, the cooling period which reduces the adhesiveness of an adhesive agent conventionally is not required. Moreover, the label fitting process which fits the cylindrical label 30 immediately after completion | finish of the above-mentioned adhesion part formation process by forming the adhesion part 40 using the adhesive which exhibits adhesiveness even if there is no heating. It can be carried out.

  Subsequently, the heating process which heats the container main body 20 fitted with the cylindrical label 30 to predetermined temperature is performed. As a result, the cylindrical label 30 that covers the outer peripheral surface of the trunk portion 22 and covers the opening end of the recess 26 is thermally contracted and adheres closely along the outer peripheral surface of the trunk portion 22. At the same time, the adhesive portion 40 formed in the recess 26 is activated by heating, and the tackiness is improved. In addition, when the adhesion part 40 has sufficient adhesiveness, it is not necessary to heat the adhesion part 40 and to improve adhesiveness. And the cylindrical label 30 which entered the recessed part 26 by heat contraction, and the adhesion part 40 which has adhesiveness adhere and join. As a result, as shown in FIG. 1, the cylindrical label 30 is attached to the body portion 22 of the container main body 20, and the labeled container 10 in which the cylindrical label 30 is prevented from dropping by the adhesive portion 40 is manufactured.

  The heating method and the heating device for heating the cylindrical label 30 in the heating step are not particularly limited as long as the cylindrical label 30 can be thermally contracted. As a heating device used in the heating process, for example, the cylindrical label 30 is passed by passing the container body 20 in which the cylindrical label 30 is fitted into the interior maintained at a temperature equal to or higher than the thermal contraction temperature of the cylindrical label 30. A heating tunnel having a plurality of nozzles, and a heating apparatus having a configuration in which heated gas or steam is sent from each nozzle toward the container body 20 on which the cylindrical label 30 is fitted, and is fitted with the cylindrical label 30 What is necessary is just to use the heating apparatus etc. which have the structure which immerses the container main body 20 in hot water.

  The heated gas is a gas such as air having a temperature higher than room temperature, and the temperature may be appropriately adjusted according to the heat shrink temperature of the material constituting the cylindrical label 30, for example, 80 ° C. or more and 200 ° C. or less. That's fine. The steam is not particularly limited as long as the material constituting the cylindrical label 30 can be thermally contracted, and either saturated steam or superheated steam can be used. Saturated water vapor is water vapor having a temperature equal to the boiling point of water (saturation temperature), and superheated water vapor is water vapor having a temperature exceeding the boiling point of water (saturation temperature). The temperature of the superheated steam may be, for example, higher than 100 ° C. and 300 ° C. or less at 1 atmosphere.

  In the heating step, for example, by using a heating device including a plurality of nozzles that send out the above-described heated gas or steam, the portion including at least the upper end portion of the cylindrical label 30 is heated, and the body portion 22 and After joining the cylindrical label 30, the lower part or the whole of the cylindrical label 30 is heated using a heating device such as a heat tunnel, and the cylindrical label 30 is attached in close contact with the outer peripheral surface of the body portion 22. The labeled container 10 may be manufactured. By first joining the body portion 22 and the cylindrical label 30 via the adhesive portion 40, the occurrence of shrinkage at the upper edge of the cylindrical label 30 is more reliably suppressed, and the heat-shrinkable cylindrical label 30 is intended. It can be installed in the exact position.

  In the above description, the adhesive portion forming step, the label fitting step, and the heating step are performed in this order, and the method of manufacturing the labeled container 10 is shown. However, the manufacturing method of the labeled container 10 is the above-described embodiment. It is not limited. For example, after the bonded portion forming step and before the label fitting step, an bonded portion activating step for improving the viscosity of the adhesive constituting the bonded portion 40 formed in the recess 26 may be performed. In the bonding portion activation step, for example, using a heating device including a plurality of nozzles exemplified in the description of the heating step, a heating gas or steam is sent toward the upper end portion of the container body 20 provided with the recesses 26, and bonding is performed. What is necessary is just to carry out by heating the part 40. After the adhesion part activation process is completed, the label-fitted container 10 in which the body part 22 and the cylindrical label 30 are joined via the adhesive part 40 is manufactured by continuously performing the label fitting process and the heating process. By performing the above-mentioned adhesion part activation process between the adhesion part forming process and the label fitting process, the viscosity of the adhesive constituting the adhesion part 40 can be improved more reliably.

  In the above description, the case where the cylindrical label 30 is attached to the cup-shaped container body 20 having the tapered body portion 22 has been described. However, the shape of the container main body 20 constituting the labeled container 10 of the present invention is not limited to the shape shown in FIG. 2, and can be widely applied when a cylindrical label is mounted on the body of various shapes of containers. For example, as shown in FIG. 6, the upper end portion of the body portion 28 is configured, the cylindrical portion 28 a whose outer diameter does not vary in the vertical direction, and the lower end portion is smaller in diameter than the upper end portion. You may apply to the container main body 50 which has the trunk | drum 28 which consists of the taper part 28b formed in this. In the container main body 50 shown in FIG. 6, the recessed part 26 is formed in the upper end part of the cylindrical part 28a used as the largest diameter of the trunk | drum 28. As shown in FIG. In addition, the present invention has a bowl-shaped or bowl-shaped container body, the container body has a radial cross-sectional shape close to a polygon such as a quadrangle, and the radial cross-sectional shape does not change in the vertical direction. The present invention can be applied to containers having various shapes such as those having a torso body. Further, the present invention may be applied to a case where a cylindrical label is attached to the container body as a so-called cap seal that is attached to the body part of the container body and covers the lid part of the container. Or when attaching a cylindrical label to the trunk | drum of a container main body, you may apply this invention, when covering the outer edge part of the bottom part of a container main body by a part of the lower end side of the said label.

  In the above description, the example in which the belt-shaped recess 26 is provided over the entire circumference in the circumferential direction of the body portion 22 of the container body 20, but the present invention is not limited to this, and the container body 20 It is good also as a structure which provides the several recessed part 26 intermittently along the circumferential direction of the trunk | drum 22. For example, a longitudinal stripe-shaped concave portion may be provided partially on the upper portion of the barrel portion 22 over the entire circumference in the circumferential direction of the barrel portion 22 of the container main body 20 or on the almost entire length of the barrel portion 22 in the vertical direction. Good. Or you may provide a grid | lattice-like recessed part in the upper part of the trunk | drum 22, etc. over the perimeter of the circumferential direction of the trunk | drum 22 of the container main body 20, or the substantially whole length of the trunk | drum 22 in the up-down direction. .

Further, in the above description, as an example of the function of the bonding portion 40, an example in which the upper end portion of the cylindrical label 30 is prevented from being shifted downward with respect to the intended mounting position of the container body 20 is shown. The invention is not limited to this. For example, when the cylindrical label 30 has a non-rotating function to prevent the cylindrical label 30 from moving in the circumferential direction with respect to the body portion 22 of the container main body 20, or when the radial cross section of the container main body is non-circular, The bonding portion 40 may have a positioning function such as matching the design of the label 30 in the front direction.

  The configuration of the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope of the matters described in the claims of the present application and their equivalents.

10 Labeled container, 20, 50 Container body, 22, 28 Body, 23 Flange, 24 Bottom, 26 Recess, 28a Cylindrical part, 28b Taper part, 30 Cylindrical label, 40, 41, 42 Adhesive part, D depth T, thickness.

Claims (3)

A label fitting process for fitting a cylindrical label on the trunk of the cup-shaped container body having a larger trunk than the bottom;
Heating the cylindrical label to cause heat shrinkage, and attaching the cylindrical label to the body,
A concave portion is provided on the outer peripheral surface of the trunk portion,
In the concave portion, an adhesive portion having a thickness smaller than the depth of the concave portion is formed,
In the heating step, the cylindrical label that has entered the concave portion and the adhesive portion are joined,
A method for manufacturing a labeled container.   The manufacturing method according to claim 1, further comprising an adhesive portion forming step of forming the adhesive portion by injecting a hot melt adhesive toward the concave portion using a hot melt gun. A cup-shaped container main body having a body whose opening is larger than the bottom;
A cylindrical label attached to the body of the container body;
An adhesive portion that joins the outer peripheral surface of the barrel portion of the container body and the cylindrical label;
A concave portion is provided on the outer peripheral surface of the body portion of the container body,
The adhesive portion is formed in the recess, and has a thickness smaller than the depth of the recess,
Labeled container.

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