JP3175405B2 - Cap with inner seal material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap with an inner seal material provided with an inner seal material for sealing an opening of a container for storing instant coffee or the like.

[0002]

2. Description of the Related Art A conventional cap with an inner seal material is:
An inner seal material having the structure of the resealing layer / peeling layer / membrane layer is fitted and fitted to a fitting portion formed on the upper portion of the inner side wall of the screw cap, for example, and the cap with the inner seal material is mounted on the container. Insert and screw into the induction coil through high-frequency current as it is.
As disclosed in JP-A-11958, high-frequency induction heating causes a metal thin film included in the membrane layer as an intermediate layer to generate heat, whereby the lowermost adhesive layer of the membrane layer is thermally melted to open the container. And the container was sealed. When the cap is rotated and removed to open the sealed container, the cap rises and the inner seal material is lifted by the fitting portion of the cap,
On the other hand, since the membrane layer is in close contact with the opening of the container, the inner sealing material is peeled off from the peeling layer having the weakest adhesive force by the upward and downward forces, and the membrane layer (including the peeling layer; (Abbreviated) remains in the opening of the container, the resealing layer remains on the inner top surface of the cap, and the inner seal material separates into two. To remove the contents from the container, peel off the membrane layer or break a part, and take out the contents.
The cap is sealed again by the resealing layer of the inner sealing material on the top surface inside the cap.

Here, in order to peel off the membrane layer from the opening of the container, it is preferable to provide an opening tongue. However, an inner seal material with an opening tongue is fitted on the upper part of the inner side wall of the cap. When used with the cap formed with a mating part, if the rigidity of the base material of the resealing layer is too high, when the cap is rotated and removed, the opening tongue piece rides over the fitting part of the cap. If the inner seal material comes off the cap, or conversely, if the rigidity of the base material of the resealing layer is too weak, the fitting force between the resealing layer and the cap is weak when the cap is rotated and removed. There was a problem that the sealing material came off the fitting portion, the resealing layer and the membrane layer did not peel off from the release layer, but remained at the opening of the container, and the container could not be opened.

[0004] As a method of mounting the above-mentioned inner seal material with a tongue for opening on a cap, Japanese Unexamined Utility Model Publication No. Hei 3-12686 is used.
There is a method disclosed in Japanese Unexamined Patent Publication No. 6-206. In this method, as shown in FIG. 4, the edge of the inner seal material (330) with a tongue for opening composed of the structure of the resealing layer (331) / release layer (332) / membrane layer (333) is not bonded. The adhesive (31) is left on the inner top surface (311) of the cap (310).
This is the method of bonding in 6).

[0005]

However, even in the method disclosed in Japanese Utility Model Application Laid-Open No. 3-126856, in which the inner sealing material with an opening tongue is adhered to the inner top surface of the cap, the resealing layer surface of the inner sealing material is not covered by the cap. Glued to the top,
Because the membrane layer surface is adhered to the container opening, the inner seal material is twisted when the cap is removed, and the resealing layer surface of the inner seal material and the membrane layer may not peel off from the release layer well. Was. The present invention has solved the above-mentioned conventional problems.Even if the inner seal material has an opening tongue, it can be attached to the inner top surface of the cap, and when the cap is rotated and removed from the container. Another object of the present invention is to provide a cap with an inner seal material for stably separating a resealing layer and a membrane layer of the inner seal material from a release layer.

[0006]

According to the present invention, as shown in FIG. 1A, an inner top surface (11) of a cap body (110) is provided.
An inner seal material adhesive plate (115) is rotatably provided in 1), and a resealing layer (131), a release layer (132), and a membrane layer (13) are provided on the lower surface of the inner seal material adhesive plate.
3) a cap (100) with an inner seal material, wherein the resealing layer surface of the inner seal material (130) is adhered and the inner seal material is attached to the cap.
It is.

[0007] The above-mentioned cap body is formed by injection molding using a relatively rigid plastic such as polypropylene or polyethylene.

Further, the inner sealing material adhesive plate may be formed by injection molding using a plastic such as polypropylene or polyethylene. However, the present invention is not limited to only plastic, and rigid paper or metal may be used. May be.

A method of rotatably providing an inner sealing material adhesive plate on an inner top surface of a cap is, for example, as shown in FIGS. 1 and 3 by attaching mounting frames (112, 212) to a cap body (110). Is formed at the time of or after the cap body is formed on the inner top surface (111) or the upper portion of the side wall (213), and the inner seal material adhesive plate is rotatably accommodated in this mounting frame with a gap provided on the inner surface of the cap. Things.

Further, as shown in FIG. 1A, the layer structure of the inner sealing material (130) is roughly divided into a resealing layer (131), a release layer (132), and a membrane layer (13).
3), and these layers further form a multilayered structure according to the purpose of the container.

[0011]

In order to open the container equipped with the cap with the inner seal material of the present invention, the cap is rotated counterclockwise and raised, and the resealing layer surface above the inner seal material is rotatable on the top surface inside the cap. Since the membrane layer below the other inner seal material is adhered to the mouth of the container, the inner seal material has an upward force and a downward force. You will receive it at the same time. At this time, even if the cap is rotated and lifted, the inner seal material is adhered to the rotatable inner seal material bonding plate, so that the inner seal material does not rotate together with the cap, so that the upward force and the downward force are applied. Acts in a direction perpendicular to the inner seal material surface. For this reason, the two forces work effectively and there is no waste. Due to the two upward and downward forces, the inner seal material is stably separated into the resealing layer and the membrane layer from the surface of the release layer having the weakest adhesive force as the cap is raised.

Further, in the cap with an inner seal material of the present invention, the inner seal material is resealed to the lower surface of the inner seal material adhesive plate attached to the inner top surface of the cap, and the inner seal material is attached to the cap. Because it is attached, unlike the conventional cap, which is fitted by fitting the inner seal material peripheral edge into the fitting part on the upper inside of the cap, even if the inner seal material has a tongue for opening, it is attached to the cap In addition, when the cap is removed, an accident due to the detachment of the inner seal material caused by the opening tongue piece is less likely to occur.

[0013]

【Example】

<Embodiment 1> First, as shown in FIG. 1 (a), a disk-shaped inner seal material having a step at a peripheral edge and a cap body (110) relating to a cap (100) with an inner seal material of the present embodiment. A plate (115) and a ring-shaped mounting frame (112) are separately manufactured using polypropylene by injection molding, and an inner sealing material adhesive plate is rotatable on the inner top surface of the cap body. It was mounted on the mounting frame using ultrasonic welding.

Next, as shown in FIG. 1A, a paperboard layer / wax layer / foamed polyethylene layer / adhesive polyethylene layer /
Resealing layer of polyethylene layer / polypropylene layer (1
1) and a release layer (132) having a release resin composition and a membrane layer (133) having a vinyl acetate resin layer / printing layer / aluminum foil layer / polyethylene layer configuration shown in FIG. 1 (b). (135) inner seal material (13
0), and this inner seal material with tongue for opening is
The paperboard surface of the resealing layer is attached to the lower surface of the inner sealing material adhesive plate on the inner top surface of the produced cap with a hot melt type adhesive, and the inner sealing material of the present example shown in FIG. A cap with material (100) was produced.

Then, the produced cap with an inner seal material of the present embodiment was attached to a wide-mouthed glass bottle and inserted into an induction coil through which a high-frequency current was passed. The aluminum foil of the membrane layer of the inner seal material generated heat by electromagnetic induction, and the heat melted the polyethylene layer of the membrane layer that was in contact with the mouth of the wide-mouthed glass bottle, thereby bonding the inner seal material to the mouth. Next, when the cap with the inner seal material of the present embodiment fitted and sealed and the sealed wide-mouthed glass bottle was rotated counterclockwise to remove the cap, the inner seal material, the resealing layer and the membrane layer were the peeling layer surface After being separated, as shown in FIG.
33) and the release layer (132) are provided at the mouth (1) of the wide-mouthed glass bottle.
21), the glass bottle remains sealed, and as shown in FIG. 2 (a), the resealing layer (131) is attached to the inner sealing material adhesive plate (116) on the inner top surface of the cap together with the cap. separated. In this operation, no problem occurred.

<Embodiment 2> First, as shown in FIG. 3A, a cap (200) with an inner seal material of the present embodiment.
, A flat inner sealing material adhesive plate (215), and a ring-shaped mounting frame (212) are separately manufactured by injection molding using polypropylene. An inner seal material adhesive plate was rotatably mounted on the top surface by an ultrasonic welding method using a mounting frame.

Next, in the same manner as in Example 1, the resealing layer (231) composed of a paperboard layer / wax layer / foamed polyethylene layer / adhesive polyethylene layer / polyethylene layer / polypropylene layer shown in FIG. Release layer (23)
2) and a disk-shaped inner seal material (23) shown in FIG. 3B composed of a vinyl acetate resin layer / print layer / aluminum foil layer / a polyethylene layer (233).
0) is prepared, and the inner sealing material is attached to the lower surface of the inner sealing material adhesive plate on the inner top surface of the prepared cap by bonding the paperboard surface of the resealing layer with a hot-melt type adhesive. A cap (200) with an inner seal material of this example shown in FIG.

Then, in the same manner as in Example 1, the cap with the inner seal material of the present example was mounted on a wide-mouth glass bottle and inserted into an induction coil through which a high-frequency current was passed. The aluminum foil of the membrane layer of the inner seal material generated heat due to the electromagnetic induction action, and the heat melted the polyethylene layer of the membrane layer in contact with the mouth of the wide-mouthed glass bottle, thereby bonding the inner seal material to the mouth. Next, when the cap with the inner seal material of the present embodiment fitted and sealed and the sealed wide-mouthed glass bottle was rotated counterclockwise to remove the cap, the inner seal material, the resealing layer and the membrane layer were the peeling layer surface The membrane layer was separated, and the glass bottle remained at the mouth of the wide-mouthed glass bottle with the glass bottle sealed, and the resealed layer was separated together with the cap while remaining attached to the inner sealing material adhesive plate on the inner top surface of the cap. In this operation, no problem occurred.

The present invention is not limited to the above embodiment, but can be applied to, for example, an inner seal material of a type using an adhesive instead of a high-frequency seal.

[0020]

The cap with the inner seal material of the present invention can be easily mounted on the inner top of the cap even if the inner seal material with the tongue for opening is used. This is to stably separate the resealing layer of the sealing material and the membrane layer from the release layer surface.

The cap with an inner seal material of the present invention can be applied not only to a cylindrical cap but also to a polygonal cap such as a quadrangular prism.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view when a cap with an inner seal material according to a first embodiment of the present invention is mounted on a container.
(B) is a top view of the inner seal material with the tongue piece for opening of Example 1. FIG.

FIG. 2 (a) shows a state where the resealing layer of the inner seal material remains adhered to the lower surface of the inner seal material adhesive plate on the inner top surface of the cap when the cap is removed in Example 1. It is sectional drawing. (B) is a cross-sectional view showing a state in which the release layer and the membrane layer of the inner seal material remain adhered to the mouth of the container when the cap is removed in Example 1.

FIG. 3A is a cross-sectional view when a cap with an inner seal material according to a second embodiment of the present invention is mounted on a container.
(B) is a top view of the inner seal material of Example 2.

FIG. 4 is a cross-sectional view when a conventional cap with an inner seal material is attached to a container.

[Explanation of symbols]

100, 200, 300 Caps with inner seal material 110, 210, 310 Cap body 111, 211, 311 Inner top face 112, 212 Mounting frame 113, 213, 313 Side wall 114, 214, 314 female screw 115, 215 inner seal material adhesive plate 116, 216, 316 adhesive layer 120, 220, 320 bottle container 121, 221, 321 mouth part 122, 222, 322 Neck 123, 223, 323 Male screw 130, 230, 330 Inner seal material 131, 231, 331 Resealing layer 132, 232, 332 Release layer 133, 233, 333 Membrane layer 134 , 234, 334 printing layer 135 opening tongue

Claims (1)

(57) [Claims] An inner seal material adhesive plate is rotatably provided on an inner top surface of a cap body, and a lower surface of the inner seal material adhesive plate is provided with an inner seal material formed of a resealing layer, a release layer, and a membrane layer. A cap with an inner seal material, wherein a sealing layer surface is adhered and an inner seal material is attached to the cap.