JP2002337920A - Inner seal member for sealing container mouth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inner seal member for sealing container mouth which serves as a means to form an opening with its sealing layer stuck to the mouth of a container pushed by a finger after a cap is removed from the container and to made contents taken out easily from the container. SOLUTION: The inner seal member is formed of a reseal layer comprising a board layer, an adhesive layer, a foamed body layer and a polyolefine layer and a seal layer comprising a release layer, a plastic film layer, an aluminum foil layer and a heat-sealing resin layer with an incision for forming an opening provided in a structure wherein both of the seal layer and the reseal layer are stuck together with the polyolefine layer laminated to the reseal layer stuck to the release layer surface of the seal layer. After the cap if removed, the incision of the seal layer stuck to the mouth of the container is torn up with a finger and thereby an opening for taking out contents is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner sealing material which is fitted to a mouth of a container while being mounted on a cap, and is used for sealing the mouth of the container.

[0002]

2. Description of the Related Art Conventionally, as an inner seal material for sealing a container mouth portion for generally containing a highly hygroscopic content such as coffee or the like for sealing a container mouth portion, a resealing layer comprising a paperboard layer and a polyolefin layer, Or, a reseal layer composed of a paperboard layer, an adhesive layer, a foam layer, and a polyolefin layer, a seal layer composed of a release layer, an aluminum foil layer, and a thermoadhesive resin layer, or a release layer, an aluminum foil layer, an adhesive layer, and glassine. It is known that a seal layer made of a paper layer is releasably bonded between the polyolefin layer of the reseal layer and the release layer of the seal layer. The above-mentioned inner seal material for sealing the container mouth portion, the cap loaded with the inner seal material is attached to the container mouth portion and irradiated with high frequency,
A cap loaded with an inner sealant is attached to the container mouth to which the aqueous adhesive has been applied to seal the container mouth. By removing the cap, the reseal layer remains in the cap, and the seal layer remains in the container mouth. It is separated in a state where it is adhered to the part.

[0003] However, when the cap is removed from the container mouth as described above, it is not possible to provide a projection for facilitating the finger grip on the periphery of the seal layer adhered to the container mouth. When detached, it is difficult to peel off the seal layer adhered to the mouth of the container by grasping the outer peripheral edge, and the drawback is that the seal layer must be torn, peeled from the container mouth, opened, and the contents taken out. there were.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to remove a cap from a mouth of a container, and to press a notch formed in a sealing layer adhered to the mouth of a container with a finger, so that the cap is cut along the cut. The present invention provides an inner seal material for sealing a container mouth portion, in which an opening can be formed by tearing a seal layer to make it easy to take out contents.

[0005]

In the inner sealing material for sealing a mouth of a container in which a sealing layer having a reseal layer and a plastic film layer is releasably bonded, a cut is formed in the sealing layer to penetrate the plastic film layer. With this configuration, after sealing the container mouth with the cap loaded with the inner sealing material for sealing the mouth of the container, when the cap is removed, an opening is formed in the seal layer adhered to the mouth of the container. Since the notch for forming is formed, it is possible to easily form an opening by pressing the cut portion with a finger to tear the seal layer along the cut, and to shake out the contents from the formed opening It can be scooped out with a spoon or the like. Further, the seal layer can be removed from the opening of the container by using the opening as a trigger.

In the above inner seal material for sealing the mouth of a container, the resealing layer is constituted by a paperboard layer and a polyolefin layer, a paperboard layer and an adhesive layer, a foam layer and a polyolefin layer, and a foam layer and a polyolefin layer. Thereby, an inner seal material in which the reseal layer is made of paperboard or foam can be obtained.

In the above inner seal material for sealing the mouth of the container, the seal layer is composed of a release layer, a plastic film layer, an adhesive layer, an aluminum foil layer and a heat-adhesive resin layer, a release layer, a plastic film layer and an adhesive layer. With the structure including the aluminum foil layer, the adhesive layer, and the glassine paper layer, an inner seal material that can be hermetically sealed by gluing or heat bonding the seal layer to the bottle opening can be obtained.

In the above inner seal material for sealing the mouth of the container, the partial adhesive layer is formed on the release layer surface, so that the polyolefin layer surface of the reseal layer and the seal layer portion are formed by the partial adhesive layer. Since the adhesive strength between the adhesive layer and the release layer, that is, the adhesive strength between the reseal layer and the seal layer, can be easily adjusted, the inner seal material for sealing the container opening is sealed with the reseal layer until the inner seal material is loaded into the cap. It is possible to separate the resealing layer and the sealing layer with a small force when the cap is removed from the container without the layers being peeled off.

In the above inner seal material for sealing the mouth of the container, the cut has a front end directed toward the peripheral edge of the mouth of the container.
Even if the opening is formed by tearing the seal layer along the cut, the portion that is torn along the cut does not fall off, so that the seal layer is not mixed into the contents.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a laminated structure according to a first embodiment of the present invention. FIG. 2 is a diagram showing a first embodiment in which a cap loaded with an inner sealing material for sealing a container opening is fitted into the opening of the container to apply high frequency. Fig. 3 is a partial cross-sectional view showing a state in which the cap is removed after irradiation and sealing, and the cap is removed, and FIG. FIG. 4 is a partial cross-sectional view showing a laminated structure of a second embodiment of the present invention, wherein 1 is a reseal layer,
2, 2 'is a sealing layer, 3 is a cut, 4 is a container mouth, 5 is a cap, 6 is a heat bonding part, 7 is a folding curve, 11 is a paperboard, 12 is an adhesive layer, 13 is a foam layer, and 14 is a foam layer. Polyolefin layer, 21 is a release layer, 22 is a plastic film layer, 23 and 26 are adhesive layers, 24
Represents an aluminum foil layer, 25 represents a thermoadhesive resin layer, 27 represents a glassine paper layer, 28 represents a partial adhesive layer, and 29 represents a picture layer.

The lamination structure of the first embodiment of the present invention is shown in FIG.
As shown in the figure, a reseal layer 1 in which a paperboard layer 11, an adhesive layer 12, a foam layer 13 and a polyolefin layer 14 are laminated in this order from the outer surface.
And a partial adhesive layer 28, a release layer 21, a plastic film layer 22, an adhesive layer 23, an aluminum foil layer 24, and a heat-adhesive resin layer.
The seal layer 2 on which 25 is laminated is the foam layer of the reseal layer 1.
Polyolefin layer 14 and partial adhesive layer 28 laminated on 13 sides
The seal layer 2 has a cut 3 formed so as to penetrate the plastic film layer 22. The picture layer 29 is formed on the inner surface side of the plastic film layer 22 by printing. The inner sealing material for sealing the mouth of the container of the first embodiment is peeled off at the interface between the polyolefin layer 14 laminated on the surface of the foam layer 13 of the resealing layer 1, the release layer 21 and the partial adhesive layer 28. The reseal layer 1 and the seal layer 2 can be easily separated. In the first embodiment,
Although the configuration is such that the partial adhesive layer 28 is formed on the surface of the release layer 21, the configuration may be such that the partial adhesive layer 28 is not formed.

The inner sealing material for sealing the mouth of the container according to the first embodiment is loaded in the cap so that the thermo-adhesive resin layer 25 faces down, and the inner sealing material for sealing the mouth of the container is loaded. Is fitted to the mouth of the container filled with the contents, and is irradiated with high frequency from the top of the cap, so that the heat-adhesive resin layer 25 is
Is melted and adhered to the container opening 4 so that the container opening can be completely sealed. By using the inner sealing material for sealing the mouth of the container of the first embodiment, there is no need to apply a water-based adhesive to the mouth of the container, so that the moisture of the adhesive transfers to the contents and the contents absorb moisture. Can be prevented.

By removing the cap 5 from the state in which the container opening 4 is sealed using the container opening sealing inner seal material of the first embodiment, as shown in FIG. 2, the container opening sealing inner seal is provided. Materials are polyolefin layer 14 and release layer 21
And at the interface between the polyolefin layer 14 and the partial adhesive layer 28 to separate into the reseal layer 1 and the seal layer 2, and the reseal layer 1 remains loaded inside the cap 5, Numeral 2 denotes a heat-adhesive resin layer 25 surface,
And the container mouth 4 is sealed. In the inner sealing material for sealing the mouth of the container of the first embodiment, if the adhesive strength between the polyolefin layer 14 and the release layer 21 and the partial adhesive layer 28 is too strong, when the cap 5 is removed from the mouth 4 of the container. Then, the inner sealing material for sealing the container mouth falls off the cap 5 and is adhered to the container mouth 4 without being separated into the reseal layer 1 and the sealing layer 2, and the inner sealing material for sealing the container mouth is removed. Function will not be fulfilled. Therefore, the adhesive strength between the polyolefin layer 14 and the release layer 21 and the partial adhesive layer 28 may be reduced until the reseal layer 1 and the seal layer 2 are peeled off until the inner seal material for sealing the container mouth is loaded into the cap 5. It is necessary to make an adjustment so as not to separate, and to separate the reseal layer 1 and the seal layer 2 with a small force when the cap 5 is removed from the container opening 4. Fine adjustment of the adhesive strength between the reseal layer 1 and the seal layer 2 can be performed by the partial adhesive layer 28.

FIG. 3 is a plan view of the sealing layer 2 adhered to the container opening 4 with the cap 5 removed from the container opening 4.
As shown in FIG. 5, the sealing layer 2 is in close contact with the container opening 4 by bonding the thermoadhesive resin layer 25 to the container opening 4 at the heat bonding portion 6 at the peripheral portion. A U-shaped cut 3 having a fold line 7 at the open end is formed so that the leading end is adjacent. Since the notch 3 is formed so as to penetrate the high-strength plastic film layer 22 constituting the sealing layer 2, the central portion of the U-shaped notch 3 is pressed down with a fingertip to seal along the notch 3. Layer 2
Can be torn to form a U-shaped opening, and the contents can be taken out from the formed opening without peeling off the sealing layer 2 adhered to the container opening 4. is there. Moreover, since it is the U-shaped cut 3 provided with the fold line 7 at the open end, when the opening is formed by pressing the center of the cut 3 with a fingertip, the portion cut along the cut 3 Is not dropped and mixed into the contents.

FIG. 4 shows a laminated structure according to a second embodiment of the present invention.
As shown in the figure, a reseal layer 1 in which a paperboard layer 11, an adhesive layer 12, a foam layer 13, and a polyolefin layer 14 are laminated in this order from the outer surface.
And the sealing layer 2 ′ in which the partial adhesive layer 28, the release layer 21, the plastic film layer 22, the bonding layer 23, the aluminum foil layer 24, the bonding layer 26 and the glassine paper layer 27 are laminated, The polyolefin layer 14 laminated on the surface of the body layer 13 is releasably bonded to the partial adhesive layer 28 and the release layer 21, and the seal layer 2 ′ is cut so as to penetrate the plastic film layer 22. 3 is formed. Picture layer
29 is formed on the inner surface side of the plastic film layer 22 by printing. The inner sealing material for sealing the mouth of the container according to the second embodiment is used for sealing the mouth of the container by mounting it in a cap and attaching it with a water-based adhesive applied to the mouth of the container. The plan view of the seal layer 2 'with the cap removed from the container mouth is the same as that of the first embodiment, and the cut 3 formed in the seal layer 2' is pushed along with the cut 3 by pressing with a finger. The sealing layer 2 'can be torn to form an opening.

In the first and second embodiments, the reseal layer 1 in which the paperboard layer 11, the adhesive layer 12, the foam layer 13 and the polyolefin layer 14 are laminated in this order from the outer surface is used. A configuration in which the paperboard layer 11 and the polyolefin layer 14 are stacked without using any layer may be adopted. In the case of a configuration using a foam layer as the reseal layer, cushioning properties are imparted, so that the container mouth can be sealed with a weak pressure when the cap is attached to the container mouth, so that the fitting type cap can be used. Are suitable.

In the first and second embodiments, the cuts 3 are made of the plastic film layer 22 having high strength of the sealing layers 2, 2 '.
And an adhesive layer 23, an aluminum foil layer 24, and a thermo-adhesive resin layer 25 laminated on the plastic film layer 22, or an adhesive layer 23, an aluminum foil layer 24, and an adhesive layer 26. Since the tearing strength of the glassine paper layer 27 is low, an opening can be formed by pressing down the center of the U-shaped cut 3 with a fingertip to tear the seal layers 2 and 2 ′ along the cut 3. The size and shape of the cut 3
The position can be set arbitrarily. When the content such as instant coffee is shaken out from the opening and used, it is preferable that the content is formed small adjacent to the heat bonding portion 6 of the sealing layers 2, 2 ', and the content is scooped out with a spoon or the like. In such a case, it is preferable to form the seal layers 2 and 2 'large at the center. Further, the cut 3 may have a form in which the seal layer can be removed by using the opening as a trigger. The shape of the cut 3 may be a perforation, a line having a pawl, or the like.

Examples of the resin usable for the release layer 21 include nitrocellulose resin, polyamide resin, acrylic resin, rubber resin, polyester resin, polyurethane resin, vinyl chloride-vinyl acetate copolymer resin and the like. A single substance or a mixture. A composition in which a silicone resin is added to a simple substance or a mixture of the above resins may be used. Release layer 21
Is formed by solid printing on the entire surface. Since the above resin has a weak affinity for the polyolefin layer 14 made of polyethylene or the like and has releasability, by laminating the melt-extruded polyolefin layer 14 on the surface of the release layer 21, the release layer 21 and the polyolefin 5 to 50 g / 30 m adhesive strength between layers 14
Since the width can be adjusted to about m, the adhesive strength can be made weak enough to separate the reseal layer and the seal layer when the cap 5 is removed from the container opening 4.

Resins that can be used for the partial adhesive layer 28 include chlorinated polypropylene and ethylene-vinyl acetate copolymer. These resins have good affinity for the polyolefin layer 14 made of polyethylene or the like, and therefore adhere well to the polyolefin layer 14. Therefore, by forming the partial adhesive layer 28 on the surface of the release layer 21 such that these resins have a predetermined area ratio in the form of dots, grids, lines, etc., the polyolefin layer 14 and the release layer are formed. The adhesive strength between the adhesive layer 21 and the partial adhesive layer 28, that is, the adhesive strength between the reseal layer and the seal layer is 5
Fine adjustment is easy in the range of ５０50 g / 30 mm width.

The paperboard layer 11 has a rigid basis weight of 5
A paperboard such as a nipple ball of about 00 to 650 g / m ² is used. By using the above-mentioned rigid paperboard to attach the cap loaded with the inner sealing material for sealing the mouth of the container to the mouth of the container filled with the contents and sealing, and then remove the cap from the mouth of the container. In addition, the inner sealing material for sealing the mouth of the container does not fall off the cap, and the sealing layer can be separated into the sealing layer and the resealing layer with the sealing layer remaining in the cap, and can be opened.
As the adhesive layer 12, the polyolefin layer 14, and the adhesive layer 23, hot melt extruded polyethylene or the like is used. Foam layer
As 13, a polyolefin foam having a thickness of 0.6 to 1.0 mm made of polypropylene, polyethylene or the like is used. As the plastic film layer 22, a biaxially oriented film such as biaxially oriented polyethylene terephthalate, biaxially oriented polypropylene, or biaxially oriented nylon can be used, but biaxially oriented polyethylene terephthalate is most preferred. As the heat-adhesive resin layer 25, a hot-melt type heat-adhesive resin containing an ethylene-vinyl acetate copolymer as a main component is used.

The method of manufacturing the inner sealing material for sealing the mouth of the container according to the first embodiment is as follows. A release layer and a partial adhesive layer are provided on one surface of a plastic film layer such as biaxially stretched polyethylene terephthalate and a pattern is provided on the other surface. Each layer is formed by gravure printing or the like, and a predetermined shape cut is formed at a predetermined position. Then, an aluminum foil is laminated on the picture layer surface of the plastic film layer with an adhesive layer of polyethylene or the like, and further heat-adhesive to the aluminum foil layer surface. A sealing layer is formed by forming a resin layer. Next, the surface on which the release layer and the partial adhesive layer of the sealing layer are formed and one surface of the foam layer are laminated by a hot-melt extruded layer of polyethylene or the like, and a hot melt adhesive is applied to the other surface of the foam layer. The paperboard is laminated and cut into a predetermined length to prepare a sheet-like laminate for an inner sealing material for sealing the container mouth. Finally, an inner seal material for sealing the mouth of the container can be manufactured by cutting and punching at a predetermined position. In the case of the inner sealing material for sealing the mouth of the container according to the second embodiment, a release layer and a partial adhesive layer are printed on one surface of a plastic film layer such as biaxially stretched polyethylene terephthalate, and a picture layer is printed on the other surface by gravure printing. Except that after forming a cut of a predetermined shape at a predetermined position and then forming a seal layer by laminating aluminum foil and glassine paper with an adhesive layer of polyethylene or the like on the pattern layer surface of the plastic film layer, It can be manufactured in the same manner as in the first embodiment.

[0022]

According to the present invention, there is provided an inner sealing material for sealing a mouth of a container in which a sealing layer having a resealing layer and a plastic film layer is releasably bonded, wherein a cut is formed in the sealing layer to penetrate the plastic film layer. After sealing the container opening with the cap loaded with the inner sealing material for sealing the container opening, when the cap is removed, an opening is formed in the seal layer adhered to the container opening. Since the cut is formed, the seal layer can be torn along the cut by pressing the cut with a finger to easily form an opening, and the contents can be spun out from the formed opening or scooped with a spoon or the like. Can be put out. Further, the seal layer can be removed from the opening of the container by using the opening as a trigger.

In the above inner seal material for sealing the mouth of a container, the resealing layer is constituted by a paperboard layer and a polyolefin layer, a paperboard layer and an adhesive layer, a foam layer and a polyolefin layer, and a foam layer and a polyolefin layer. Thereby, an inner seal material in which the reseal layer is made of paperboard or foam can be obtained.

In the above inner seal material for sealing the mouth of the container, the seal layer is composed of a release layer, a plastic film layer, an adhesive layer, an aluminum foil layer and a thermo-adhesive resin layer, a release layer, a plastic film layer and an adhesive layer. With the structure including the aluminum foil layer, the adhesive layer, and the glassine paper layer, an inner seal material that can be hermetically sealed by gluing or heat bonding the seal layer to the bottle opening can be obtained.

In the above inner seal material for sealing the mouth of the container, the partial adhesive layer is formed on the surface of the release layer, so that the surface of the polyolefin layer of the reseal layer and the portion of the seal layer are formed by the partial adhesive layer. Since the adhesive strength between the adhesive layer and the release layer, that is, the adhesive strength between the reseal layer and the seal layer, can be easily adjusted, the inner seal material for sealing the container opening is sealed with the reseal layer until the inner seal material is loaded into the cap. It is possible to separate the resealing layer and the sealing layer with a small force when the cap is removed from the container without peeling off the layer.

In the above inner seal material for sealing the mouth of the container, the notch has a front end portion directed toward the peripheral edge of the mouth of the container.
Even if the opening is formed by tearing the seal layer along the cut, the portion that is torn along the cut does not fall off, so that the seal layer is not mixed into the contents.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a laminated structure according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a resealing layer and a sealing layer when a cap loaded with an inner sealing material for sealing a mouth of a container according to the first embodiment is fitted to the mouth of the container, irradiated with a high frequency wave, sealed, and then removed. FIG.

FIG. 3 is a plan view of a seal layer adhered to the container mouth when the cap of the inner seal member for sealing the mouth of the container according to the first embodiment is removed.

FIG. 4 is a partial cross-sectional view illustrating a stacked configuration according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Resealable layer 2, 2 'seal layer 3 Cut 4 Container opening 5 Cap 6 Thermal bonding part 7 Fold curve 11 Paperboard 12 Adhesive layer 13 Foam layer 14 Polyolefin layer 21 Release layer 22 Plastic film layer 23, 26 Adhesive layer 24 Aluminum foil layer 25 Thermal adhesive resin layer 27 Glassine paper layer 28 Partial adhesive layer 29 Picture layer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E084 AB07 BA02 BA06 BA07 BA08 BA09 CA01 DA01 DB11 FA09 FD13 GB08 HA01 HA02 HB03 HB08 HC08 HC09 HD01 LA01 LB02 LB10 4F100 AB10E AB33E AK01E AK03D AK04B AK04E AK07C00A BA10A BA10E DA04 DG10A DG10E DJ01C GB16 HB31 JK06 JL11B JL14 JL14E

Claims (5)

[Claims] 1. An inner sealing material for sealing a container mouth portion in which a sealing layer having a resealing layer and a plastic film layer is releasably adhered, wherein the sealing layer has a cut formed through the plastic film layer. An inner sealing material for sealing the mouth of a container. 2. The container opening according to claim 1, wherein said resealing layer comprises a paperboard layer and a polyolefin layer, a paperboard layer and an adhesive layer, a foam layer and a polyolefin layer, and a foam layer and a polyolefin layer. Inner sealing material for sealing. 3. The seal layer includes a release layer, a plastic film layer, an adhesive layer, an aluminum foil layer, and a thermo-adhesive resin layer, a release layer, a plastic film layer, an adhesive layer, an aluminum foil layer, an adhesive layer, and glassine. 3. The inner sealing material for sealing a mouth of a container according to claim 1, wherein the inner sealing material is made of a paper layer. 4. The inner sealing material for sealing a mouth of a container according to claim 1, wherein a partial adhesive layer is formed on the surface of the release layer. 5. The inner seal material for sealing a container mouth according to claim 1, wherein the cut has a U-shape with a tip portion directed toward a peripheral edge of the container mouth.