JPS601227B2 - sealed container - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sealed container that makes it possible to confirm whether or not the sealing seal attached to the closing part of the container is completely adhered. It is something.

<Prior Art> Conventionally, containers of this type have been sealed by integrally bonding a fiber seal to the entrance of the container by thermal welding, ultrasonic bonding, or injection molding.

Problems to be Solved by the Invention: However, in such conventional containers, when a woven seal is used, it is not possible to visually confirm whether the seal is complete or not. In general, sealing was confirmed only by removing a few pieces from a large number through a sampling inspection, etc., and then peeling off the seal. There were imperfections that made testing impossible.

In addition, it was not possible to guarantee the quality of all products at the production stage, and consumers were also unable to check that the container was sealed and whether it had been used illegally before purchasing. Furthermore, even if the sealing process is carried out using modern equipment, if the seal is adhered to the entrance of the container using adhesives, heat deposition, ultrasonic welding, etc., the tensile peel strength will vary from 50 to 3,000 degrees. If the adhesive strength is weak, there is a risk that it will easily peel off during transportation or at a stopper, and if the adhesive strength is too strong, there will be drawbacks such as the inability to open the seal with your fingertips. Although the entire surface must be bonded uniformly, there are cases where only a portion of the bond is bonded, or a portion of the bond is excessively bonded and breaks off when peeled off. Conventional methods have the disadvantage that defective products cannot be determined at all based on appearance.

<Means for solving the problems> The present invention has been made by focusing on these problems,
By welding a seal made by laminating a thin colored synthetic resin film made of the same material as the container on the back side of a transparent film to the upper edge of the closing part of the container, the area applied to the upper edge of the opening part is colored. A sealed container is constructed by melting Flume, and the difference in permeability due to the difference in wall thickness between the melted part and the unmelted part of the seal, and the green tone above the closing part of the container from the melted part is the seal. It is possible to confirm complete sealing by revealing the material from the upper surface of the material.

<Function> The container according to the present invention is constructed by laminating a colored film of the same quality that can be adhered to the container on the back side of a transparent film, and the seal is placed on the opening of the container and allowed to settle. When the container is opened, only the part of the colored film that is applied to the opening of the container melts, and the difference in permeability due to the difference in wall thickness between the melted part and the unmelted part of the bracket and the opening of the container from the melted part. The color tone of the upper edge of the □ section can be seen through the transparent film from the upper surface of the seal, so you can check whether the seal between the seal and the container is complete.
Furthermore, it is possible to accurately determine from the appearance whether or not the adhesion is uniform throughout.

Furthermore, by changing the thickness of the film on the back side, the adhesion strength between the seal and the container can be freely changed. Embodiments> Examples of the present invention will be explained in detail with reference to the drawings. In FIG. A colored film 3 made of polyethylene, for example, of the same quality is integrally laminated.

The transparent film 2 has a thickness of approximately 100 to 150 microns, while the colored film 3 is adhered to the container.
It is necessary to make it extremely thin, and a thickness of ~20 to 50 microns is used. Next, in FIGS. 2 and 3, a sealing seal is layered on the upper edge 5 of the closed section of the polyethylene container 4 so that the colored film 3 supports it, and then, in this state, a sealing seal is applied. When the container 4 is high-frequency welded, a part of the colored film 3 of the seal 1 that is in contact with the upper edge 5 melts, and the difference in color transmittance due to the difference in wall thickness between the melted part and the unmelted part occurs. Then, from the molten portion, a green tone on the closing part of the container appears on the upper edge 6 of the container 4 from the upper surface of the sealing seal, and the sealing seal can be brought into close contact with the container.

<Effects of the Invention> As described above, in the container according to the present invention, the sealed state of the opening of the container can be completely confirmed from the appearance, and the occurrence of defective products as in the past can be prevented in advance. It is effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the seal, and FIGS. 2 and 3 are illustrations for explaining its use. 1 is a seal, 2 is a transparent film, 3 is a film, 4' is a container, and 5 is an upper edge of a closing part. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A seal made by integrally laminating an extremely thin synthetic resin colored film made of the same material as the container to be sealed on the back side of a transparent film is brought into contact with the upper edge of the opening of the container, and the seal is placed over the opening of the container. Welding the edge and the colored film,
A sealed container having a wall thickness difference between a welded part and a non-welded part of the colored film.