JP2014073862A - Lid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive lid material for a drink container that solves every conventional problem point, eliminates the need for an overcap so as to obtain sufficient sticking resistance, avoids using aluminum, has excellent sticking operability for a straw, and has no sanitary problem.SOLUTION: There is provided a lid material for sealing the opening part of a container containing a liquid, the lid material being characterized in that an upper film and a lower film are stuck together in a peelable state with an easy peel sealant layer interposed, and the lower layer comprises a base material layer and the sealant layer and is provided with an insertion hole cut line forming a hole for inserting a suction tool and an opening cut line for separating an opening tab from the lower film.

Description

  The present invention relates to a lid member that seals an opening of a container, and more particularly, to a lid member that is suitable for use in drinking directly from a container that contains a beverage.

  Various containers and containers are used as liquid containers used for drinking directly from a container containing beverages with a straw. As a form of inserting the straw, for example, there is a method in which a hole into which the straw can be inserted is opened in a container or a lid material, and the hole is covered with a peelable seal piece (Patent Document 1).

  This method is superior in terms of hygiene because the straw insertion part is covered with a protective seal, and there is also a sense of security in the psychological aspect of the user. However, this method requires a separate seal to be prepared or affixed, which is problematic in terms of cost, and it is difficult to ensure the barrier property of the straw hole portion.

  Next, there is a method in which the lid member is directly pierced with a straw having a sharp tip and opened. In this case, a material with good piercing properties such as an aluminum foil is generally used as the lid. This method is an excellent method from the viewpoint of barrier properties, and has an advantage that a straw can be inserted anywhere in the lid.

  However, in recent years, aluminum tends to be shunned due to environmental problems, the tip of a pointed straw is dangerous, and the strength of the lid (puncture resistance) is insufficient when trying to improve the pierceability of the lid There is a problem that an overcap is necessary. Also, from the viewpoint of hygiene, an overcap is desired to keep the lid surface clean, but the overcap is a major factor in increasing costs.

  Furthermore, as another method, a method that should be called a compromise between the above two methods is known. That is, the barrier cover material is subjected to brittle processing such as a half-cut line at the place where the straw is inserted, and this portion is covered with a barrier film piece. This method is described in the example of Patent Document 2.

  According to this method, it is possible to avoid the use of aluminum, there is no problem in terms of barrier properties, and it is satisfactory in terms of the pierceability of the straw, but the first is that a protective seal is used. Problems similar to the method remain.

JP 2010-184731 A Japanese Patent Laid-Open No. Sho 63-313570

  The problem to be solved by the present invention is to solve all the above-mentioned problems of the prior art, and since it has sufficient puncture resistance, it is not necessary to use an overcap, and the use of aluminum can be avoided, and a straw It is an object of the present invention to provide a lid for a beverage container that has good stab operability and is free from problems in terms of hygiene.

As a means for solving the above-mentioned problems, the invention according to claim 1 is a lid member for sealing an opening of a container for storing a liquid, wherein the lower film and the upper film are an easy peel sealant. The lower film has a base material layer and a sealant layer, and the lower film has an insertion hole score line for forming a hole for inserting a suction tool, and an opening tab. It is a lid | cover material characterized by being provided with the opening cut line for cut | disconnecting from a lower film.

  Since the lid according to the present invention is releasably bonded to the lower film and provided with an insertion hole score line for forming a hole for inserting the suction tool into the lower film, after peeling the upper film, A suction tool such as a straw can be inserted into the insertion hole cut line portion very easily. Moreover, since the insertion hole score line is protected by the upper film, there is no problem in terms of barrier properties and puncture resistance.

  The invention according to claim 2 is the lid according to claim 1, wherein the easy peel sealant layer is partially provided so as to cover at least the insertion hole score line. .

  The invention according to claim 3 is the lid according to claim 1 or 2, wherein the insertion hole cut line has a shape in which a direction facing the opening tab is interrupted.

  In the lid according to the present invention, the lower film and the upper film are detachably bonded via an easy peel sealant layer, so that sufficient piercing strength can be ensured while the upper film is peeled off. As a result, the cut line of the insertion hole provided in the lower film is exposed, so that a suction tool such as a straw can be inserted into this portion very easily. Since the insertion hole is protected by the upper film, there is no problem in terms of hygiene and no problem in terms of barrier properties.

  The lid according to the present invention has an upper and lower two-layer structure, but it does not take time and effort to seal the straw hole portion with a separate sealing piece, which is advantageous in terms of cost because the process is simple.

  In the invention according to claim 2, when the easy peel sealant layer is partially provided so as to cover at least the insertion hole score line, it is easy to peel off the upper film, and it does not take time for opening. can do.

  Further, in the invention according to claim 3, when the insertion hole cut line has a shape in which the direction facing the opening tab is interrupted, the portion of the insertion hole peels off and does not fall into the container. . Moreover, when peeling an upper film, it has the effect that it can peel cleanly without tearing.

FIG. 1 is a schematic plan view showing an embodiment of a lid according to the present invention. FIG. 2 is a schematic cross-sectional view showing the X-X ′ cross section of FIG. 1. FIG. 3 is a schematic plan view showing another embodiment of the lid according to the present invention. FIG. 4 is a schematic cross-sectional view showing a Y-Y ′ cross section of FIG. 3.

Hereinafter, the lid according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of a lid according to the present invention, and FIG. 2 is a schematic cross-sectional view showing an XX ′ cross section of FIG.

  The lid material (1) according to the present invention is a lid material for sealing an opening of a container body (10) for storing a liquid, and the lower film (4) and the upper film (2) are easy peels. It is bonded so as to be peelable through the sealant layer (3).

The lower film (4) has a base material layer (5) and a sealant layer (6), and an insertion hole score line (9) for forming a hole for inserting a suction device such as a straw in the lower film (4). And an opening score line (8).

  When the opening cut line (8) provided at the base of the opening tab (7) is peeled upward with the opening tab (7), the opening tab (7) is separated from the lower film, It is provided so that only the upper film (2) is peeled off.

  The lid member (1) is heat-sealed to the flange part (11) of the container body (10) by the sealant layer (6) of the lower film (4) to form a container seal part (12).

  In the embodiment shown in FIGS. 1 and 2, the easy peel sealant layer (3) that releasably bonds the lower film (4) and the upper film (2) is the central part of the lid (1). Are provided in a portion corresponding to the insertion hole cut line (9), a portion of the opening tab (7), and a portion corresponding to the container seal portion (12).

  Thus, by providing the easy peel sealant layer (3) partially, it is possible to minimize the peeling resistance when peeling the upper film (2).

  Moreover, in this example, the shape of the insertion hole score line (9) is an inverted C shape in which the direction facing the opening tab (7) is interrupted. By making the shape partly interrupted in this way, it is possible to prevent an accident that the inside of the insertion hole score line (9) is cut and falls into the content liquid.

  Moreover, when the upper film (2) is peeled off, the inside of the insertion hole score line (9) is attached to the upper film by setting the position of the interrupted portion in the direction facing the opening tab (7). It peels smoothly without tearing.

  The shape of the insertion hole score line (9) is not limited to the inverted C shape as shown in FIG. 1 and is not particularly illustrated, but may be a U shape or a U shape. In addition, when the easy peel sealant layer (3) has sufficient adhesive strength and there is no risk of the inside of the insertion hole score line (9) falling from the upper film (2), it is an unbroken connected shape such as a circle Etc.

  In this case, a hole for inserting the suction tool is formed at the same time as the upper film (2) is peeled off.

  As a method for forming the opening cut line (8) and the insertion hole cut line (9), a known method such as a method using a laser or a method using a cutting blade can be used.

  FIG. 3 is a schematic plan view showing another embodiment of the lid member (1) according to the present invention. FIG. 4 is a schematic cross-sectional view showing the Y-Y ′ cross section of FIG. 3. In FIG. 4, the container body is omitted.

  In the embodiment shown in FIGS. 3 and 4, the easy peel sealant layer (3) is applied to the entire surface. Further, a full-opening tab (13) for peeling off all the lid material (1) is provided. Unlike the opening tab (7), the full opening tab (13) is not provided with the opening cut line (8) at the base portion, so that the lid body (1) is integrated with the upper and lower films (10). It can be used in the case where all the flange portions (11) are peeled off.

  The full opening tab (13) is used when the contents are transferred to another container without using a suction tool such as a straw.

  As for the container body (10) using the lid material (1) according to the present invention, an example of a paper cup type container is shown in FIGS. 1 and 2, but the material and shape of the container body (10) are particularly limited. It is not something. However, since the lid material (1) according to the present invention can exhibit excellent performance in terms of barrier properties, the container main body (10) can also be used as a container with excellent barrier properties. The characteristics of the lid (1) can be fully utilized.

Next, the material used for the lid | cover material (1) based on this invention is demonstrated.
Various synthetic resin films can be used as the upper film (2). Specific examples include low density polyethylene (LDPE) resin, high density polyethylene (HDPE) resin, linear low density polyethylene (LLDPE) resin, polypropylene (PP) resin, polyolefin resin such as polyolefin elastomer, polyethylene Polyester resins such as terephthalate (PET) resin, polybutylene terephthalate (PBT) resin, polyethylene naphthalate (PEN) resin, cellulose resins such as cellophane and cellulose triacetate (TAC) resin, polymethyl methacrylate (PMMA) resin , Ethylene-vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, polyamide resin, polystyrene (PS) resin, polyvinyl chloride (PVC) resin, polyvinyl chloride Den (PVDC) resin, polycarbonate (PC) resin, fluorine resin, a synthetic resin film such as urethane resin, may be used alone or in a state of being combined.

  In addition to the synthetic resin film, paper, aluminum foil, and the like can also be used. A gas barrier layer may be provided. Examples of the gas barrier layer include: a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film and the like, and a PET film and other metals such as aluminum. A metal vapor-deposited film, an inorganic oxide vapor-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET film, a polyvinylidene chloride coating, a film containing a water-soluble resin and an inorganic layered compound, A gas barrier coating layer such as a resin layer made of a film obtained by reacting a metal alkoxide or a hydrolyzate thereof and an isocyanate compound, or a metal foil such as an aluminum foil can be used.

  Printing can also be performed on the surface of the upper film (2). When the outermost surface is a transparent film, printing may be performed on the back surface side of the transparent film, or printing may be performed on the surface of the second layer.

  As the easy peel sealant layer (3), commercially available easy peel resins, easy peel films, easy peel varnishes and the like can be used. As shown in the examples of FIGS. 1 and 2, when partially provided, it is formed by a printing method using easy peel varnish.

  The form of peeling of the easy peel layer (3) may be any form of a cohesive peeling type, an interlayer peeling type, and an interface peeling type. In the case of the interface peeling type, it can be arbitrarily designed whether the easy peel layer (3) adheres to the upper film or the lower film when peeled.

  As the base material layer (5) of the lower film (4), each material mentioned as the material of the upper film (2) can be used. Further, when both the upper film and the easy peel sealant layer are transparent, printing can be performed on the surface of the base material layer (5) of the lower film so that it can be seen through from the surface. Of course, it is also possible to perform printing separately from the upper film.

  As the sealant layer (6), a sealant layer made of a suitable material is selected according to the surface material of the flange portion (11) of the container main body (10) as the adherend. In general, a polyolefin resin is generally used as the material for the sealant layer. Specifically, a low density polyethylene resin, a medium density polyethylene resin, a linear low density polyethylene resin, and ethylene-vinyl acetate are used. Polymers, ethylene-α olefin copolymers, ethylene resins such as ethylene-methacrylic acid resin copolymers, blend resins of polyethylene and polybutene, homopolypropylene resins, propylene-ethylene random copolymers, propylene-ethylene Polypropylene resins such as block copolymers and propylene-α olefin copolymers are used.

Specific examples of the combination of each material are shown below. In addition, / shows lamination | stacking by an adhesive agent. <Combination example 1>
Upper film: PET (12 μm) / Metal oxide vapor-deposited PET (12 μm) (Gas barrier film: GL film manufactured by Toppan Printing Co., Ltd.) / Easy peel sealant film (Co-extruded film 30 μm: ABF-64C manufactured by Tosero)
Lower film: PET (12 μm) / GL film (12 μm) / LDPE (60 μm)

<Combination example 2>
Upper film: PET (12 μm) / Easy peel layer lower film: PET (12 μm) / LDPE (60 μm)

<Combination example 3>
Upper film: Easy peel layer lower film for OPP / PP: PP / LDPE (60 μm)

  The lid according to the present invention is preferably used as a lid for containers for storing beverages. In addition to this, for example, various liquids are stored, and a pump or the like is used as a suction tool. It can be widely used for the purpose of taking out the odor.

DESCRIPTION OF SYMBOLS 1 ... Lid 2 ... Upper film 3 ... Easy peel sealant layer 4 ... Lower film 5 ... Base material layer 6 ... Sealant layer 7 ... Opening tab 8 ... Opening cut line 9 ... Insertion hole cut line 10 ... Container body 11 ... Flange part 12 ... Container seal part 13 ... Tab for full opening

Claims (3)

  A lid for sealing an opening of a container for storing a liquid, wherein a lower film and an upper film are detachably bonded via an easy peel sealant layer, and the lower film is a base material layer It has a sealant layer, and the lower film is provided with an insertion hole score line for forming a hole for inserting a suction tool, and an opening score line for separating the opening tab from the lower film. Cover material.   The lid material according to claim 1, wherein the easy peel sealant layer is partially provided so as to cover at least the insertion hole cut line.   The lid material according to claim 1, wherein the insertion hole cut line has a shape in which a direction facing the opening tab is interrupted.

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