JP2006016003A - Container with sealing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container with a sealing structure with excellent quality capable of uniformly conducting a heat generated by high-frequency induction heating without dissipating it and simply releasing an aluminum seal. <P>SOLUTION: The container A with the sealing structure is characterized by that an aluminum foil piece 1 is transformed into approximately the same shape as an opening part of a container 7 made of a synthetic resin, and an intermediate film 2 for sealing made of a substance which is not thermally fusible with the synthetic resin film 4 and having a tongue piece 3 on its peripheral edge is heat-welded between the synthetic resin film 4 and the aluminum foil piece 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an aluminum sealed hermetically sealed container in which heat generated by high frequency induction heating is uniformly conducted to the container opening without being dissipated in the tongue piece, and the aluminum foil piece can be easily peeled off when used. The present invention relates to a sealed structure container.

  As a container with a high-frequency seal on the opening of a synthetic resin container, a metal sheet is laminated to a peelable film with a tongue on the periphery, and the heat source of the high-frequency seal and the peeling function are combined at one reason. A peelable seal lid is known. For example, in Patent Document 1, a knob is provided on the outer periphery made of nonwoven fabric, paper or the like with a packing member, and an aluminum flake and a polyethylene flake are laminated on the lower surface of the packing member in order and laminated so as to be approximately the same shape as the inner diameter of the cap. What was formed is described (patent document 1: Japanese Patent Publication No. 50-12358).

  However, in the invention described in the above-mentioned document 1, since the metal portion is also present in the tongue piece protruding from the periphery, heat escapes from the tongue piece during sealing by high frequency induction heating, and the vicinity of the tongue is the seal weakening portion. There was a thing. Further, when the tongue piece portion is enlarged, it becomes easy to pick, but the vicinity of the tongue piece portion tends to become a seal weakening portion more remarkably. This has been a cause of deterioration in the quality of the container contents and leakage of the contents from the periphery of the opening when the container is used for opening.

Therefore, in order to eliminate the above-mentioned weakened portion of the seal that occurs when heat is dissipated during high-frequency induction heating sealing, the sheet with the peelable metal laminate sheet on the inside is folded in half and folded into a shape that fits the inner circumference of the cap. An aluminum seal lid with a pull tab that has been punched in an arc shape leaving behind the eyes was devised. (Patent Document 2: Japanese Utility Model Publication No. 58-46762)
Japanese Patent Publication No. 50-12358 Japanese Utility Model Publication No. 58-46762

  However, the sealed container in which the half-folded aluminum seal lid member is provided with a synthetic resin cap and subjected to high frequency induction heating has caused another problem that the inner top surface of the cap and the aluminum seal lid member are welded. In addition, since this container has a structure in which two metal sheets overlap each other at the opening, there is a drawback that the thermal conductivity is deteriorated and the efficiency at the time of heating at a high frequency is not good.

  Therefore, as a result of various considerations of the above-described problems of the prior art, the present inventor decided to remove the metal on the tongue piece portion, and the metal foil that does not dissipate the heat generated during the high frequency induction heating seal to the tongue piece. If it is in the shape of a piece, heat may be conducted uniformly to the opening of the container, and in this way, the aluminum seal can be easily removed at the time of opening, and it is large to make it easier to pick the tongue piece Even if the shape of the tongue piece is made, it is thought that the vicinity of the tongue piece portion can be a sealed structure container that does not become a seal weakening portion, and the present invention has been completed by actually making a prototype.

  That is, the present invention provides an excellent hermetically sealed container that conducts heat uniformly due to high frequency induction heating without being dissipated, can easily peel off the aluminum seal, and does not cause deterioration in the quality of the container contents. The purpose is to provide.

  To achieve the above object, the sealed structure container of the present invention is a container formed by heat sealing a synthetic resin film having a discharge port welded to an opening of a synthetic resin container. A sealing intermediate film having substantially the same shape as the opening of the container and having a tongue piece between the synthetic resin film and the aluminum foil piece that is not thermally welded to the synthetic resin film. It is characterized by being heat sealed.

  With this configuration, when the container is opened, when the synthetic resin cap is first removed from the sealed structure container, the sealing intermediate film is heat sealed to the synthetic resin film. Next, when picking up the tongue piece on the periphery of the sealing intermediate film, the aluminum thin piece is also lifted together with the sealing intermediate film, and has a welded discharge port at the opening of the synthetic resin container, and Only the synthetic resin film in which the opening is thermally welded to a uniform strength remains. Therefore, when the body part of the container is pushed and the contents are extracted from the discharge port, the container can be pushed out without leaking from the periphery of the container opening.

  Since the sealed structure container of the present invention has the above structure, the heat generated by the high frequency induction heating can be uniformly conducted without being dissipated and the container can be reliably sealed. This can arbitrarily determine the size and shape of the tongue piece for easy picking. Further, since the tongue piece is easy to pick, the sealing interlayer can be easily peeled off by simply picking up the tongue piece. Furthermore, even if the tongue is enlarged, heat is conducted evenly, so it does not become a weakened part of the seal, so there is no risk of the container contents coming into contact with the outside air, and there is no leakage from the weakened part during use. Can provide excellent products.

  Next, the present invention will be described with reference to an embodiment shown in the drawings. This invention is not restrained by the Example mentioned later.

  FIG. 1 is a cross-sectional view in which a part of the entire sealed structure container is cut away, FIG. 2 is an exploded perspective view of the main part, FIG. 3 is an explanatory view of how to use the sealing interlayer, and FIG. FIG. 3 is a cross-sectional explanatory view of the sealing intermediate film with a mark.

  The sealed structure container A according to the present embodiment is made of polyethylene having a star-shaped discharge port 5 made of substantially the same material as the container 7 on the opening of a synthetic resin container 7 made of soft polyethylene as shown in FIG. A sealing intermediate film 2 made of a nylon layer made of a material not thermally welded to the synthetic resin film 4 and having a tongue piece 3 on the periphery is further formed on the synthetic resin film 4. The aluminum foil pieces 1 having substantially the same shape as the opening of the resin container are stacked. Then, a synthetic resin cap 9 is put on and screwed from above the synthetic resin container 7 in which the aluminum foil pieces 1 and the like are laminated at the mouth. In this case, the synthetic resin film 4, the sealing intermediate film 2, and the aluminum foil piece 1 are overlapped in advance and inserted into the synthetic resin cap 9, and the synthetic resin cap 9 is attached to the synthetic resin container 7. It may be screwed into the mouth.

  Next, the operation of the embodiment of the present invention will be described. Since the embodiment of the present invention is configured as described above, when the sealed structural container A is subjected to high frequency induction heating in this state, the aluminum foil piece 1 generates heat, and the heat generated in the aluminum foil piece 1 is combined with the above synthesis. Heat is also transmitted to the opening of the resin film 4 and the synthetic resin container 7, and both are welded. On the other hand, since the synthetic resin film 4 and the sealing intermediate film 2 are made of materials that are not welded, they are heat sealed in a peelable state without being welded.

  Even if the container is unscrewed from the synthetic resin cap 9, the opening of the synthetic resin film 4 and the synthetic resin container 7 is welded so that it does not peel off. Further, the synthetic resin film 4 and the sealing intermediate film 2 are not peeled off. Since the heat sealing is also performed, the sealing performance is maintained. Therefore, when opening the sealed structural container A sealed by high frequency induction heating, the synthetic resin cap 9 is first removed, and the tongue piece 3 is picked up as shown in FIG. At this time, since the sealing intermediate film 2 having the tongue piece 3 is heat-sealed rather than welded to the synthetic resin film 4, the sealing intermediate film 2 having the tongue piece 3 by lifting the tongue piece 3. Is torn off. Therefore, the synthetic resin film 4 remains welded to the opening of the synthetic resin container 7.

  Further, in the sealed structure container A of the present invention, since the aluminum foil piece 1 has substantially the same shape as the opening of the synthetic resin container, the heat generated by the high frequency induction heating is uniformly conducted without being dissipated, and the synthetic resin container 7 Can be reliably sealed over the entire circumference, and in use, the sealing intermediate film 2 can be easily peeled off by picking up the tongue piece 3. In addition, since heat is evenly conducted, there is no seal weakening portion, so that there is no risk of the container contents coming into contact with the outside air, and a product with excellent quality without leakage from the weakened portion can be provided during use.

  In addition to the above, the sealing intermediate film 4 according to the present invention can take various forms. For example, the tongue piece 3 of the sealing intermediate film 4 is preferably formed with a non-slip rib on the surface in order to facilitate picking up of the tongue piece 3 when the sealed structure container A is opened. This tongue piece 3 can be formed as shown in FIG. 4, for example, by pressing the tongue piece 3 of the sealing intermediate film 4 from above and below. The size and shape of the tongue piece 3 are not particularly limited, but it is more preferable if the tongue piece 3 does not protrude from the cap and can be easily picked.

  Here, the sealing intermediate film 2 may be made of any material that is not thermally welded to the synthetic resin film 4. For example, a single layer such as polystyrene, PET, nylon, etc., and further a synthetic resin film such as polyethylene are sequentially laminated ( The laminated film 11 may be laminated. Further, the sealing intermediate film 2 is preferably made of a material that does not easily allow oxygen to pass through, and is at least 100 cc / m 2 · day · atm or less.

  The synthetic resin container 7 and the synthetic resin film 4 may be made of the same material. For example, low density polyethylene, high density polyethylene, polystyrene, or the like may be used. When both materials are laminated films, the outer layers contacting the synthetic resin container 7 and the synthetic resin film 4 may be welded if they are the same material.

  On the other hand, the aluminum foil piece 1 may be laminated with another synthetic resin. Further, the sealing intermediate film 2 and the aluminum flakes 1 may be welded or sealed. It is sufficient that at least the aluminum foil piece is placed on the sealing intermediate film.

Sectional drawing which shows an example which notched some whole sealed structure containers An exploded perspective view showing an example of an aluminum seal lid Illustration of how to use sealing interlayer Cross-sectional explanatory drawing showing an example of a sealing intermediate film with a slipper attached to the tongue

Explanation of symbols

A Sealed structure container 1 Aluminum foil piece 2 Sealing intermediate film 3 Tongue piece 4 Synthetic resin film 5 Discharge port 7 Synthetic resin container 9 Cap 11 Laminated film

Claims (1)

In a container formed by heat sealing a synthetic resin film having a discharge port welded to an opening of a synthetic resin container,
While making the aluminum foil piece approximately the same shape as the opening of the synthetic resin container,
Sealing characterized in that it is heat-sealed with a sealing intermediate film made of a material that is not thermally welded to the synthetic resin film and having a tongue piece at the periphery between the synthetic resin film and the aluminum foil piece. Structural container.

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