JPH0532273A - Easily openable package - Google Patents

Abstract

PURPOSE:To provide a package easy to open, simple to manufacture and in structure and particularly suitable for packaging disposable medical instruments. CONSTITUTION:In an easily openable package provided with a container 1 and a lid 2, each formed by the deep drawing of synthetic resin film to receive articles therein and having heat sealed peripheral edge, an unsealing tab 4 which is formed outside a seal part 5 of the unsealed parts 5 of both the container and the lid and which has a plurality of uneven parts 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a package which can be easily opened and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, deep-drawing packaging has been used for packaging various articles. That is, a synthetic resin film is deep-drawn to form a tray-shaped container, the articles are stored in the container, and a lid member made of paper, synthetic resin, or the like is overlaid on the opening and heat-sealed. It is a thing. In order to facilitate the opening of such a package, an unsealed portion is conventionally provided outside the sealed portion to form a peel tab. That is, the end portion is gripped by hand and pulled in the opposite direction to peel off the seal portion and open the seal portion. Such packaging is particularly suitable for packaging disposable medical devices, and is widely used for packaging various medical devices such as injection needles and syringes. However, in an ordinary package, since the unsealed film and the lid material are in close contact with each other, it is difficult to first divide the end portion into two pieces by hand,
There was a problem that it was difficult to open. Therefore, in order to improve this problem, the width of the film used for the deep-drawing container is made slightly longer than the width of the lid material, and the end of the opening tab on the film side is more than the end on the lid material side. Also, those that are located outside have been proposed and put to practical use. When such an improvement is made, the unsealed portion can be prevented from adhering to a certain extent and thus easy to open, but the end portion is not open, so that it is still difficult to separate by hand. The applicant first prepared a container by deep-drawing a synthetic resin film, thermoformed the portion of the end of the container to be the open tab into a convex or concave shape, and after storing the article in the container, the lid was closed. Unsealed by stacking the material on the opening of the container, heat sealing the periphery of the container inside the concave or convex shaped part, and cutting at the concave or convex shaped part or further outside A package has been proposed in which the distance between the film and the lid member increases as it approaches the end, and the package is easy to open (Japanese Patent Laid-Open No. 2-139373). However, in the method proposed by this method, there are variations in opening of the container and the lid material in the tub, there is a problem in quality stability, and the manufacturing method is complicated.

[0003]

An object of the present invention is to improve the above-mentioned problems of the prior art, and to provide a package which is easy to open and has a simple manufacturing and structure.

[0004]

According to the present invention, in a packaging body comprising a container made of a synthetic resin film and a lid member, the peripheral portions of which are heat-sealed, an unsealed portion of the container and the lid member is provided outside the sealing portion. The present invention relates to a package in which an opening tab is formed, and the tab is provided with irregularities as shown in FIG.

In the present invention, the package which has delivered the articles to be housed in the container, for example, various medical devices such as injection needles and syringes, includes (a) a synthetic resin film formed by vacuum forming, pressure forming,
A step of producing a container by deep drawing using a conventionally known method such as a molding plug, (b) a step of delivering an article to the container, (c) a step of heat-sealing the container and a lid, and (d) opening It is manufactured by a manufacturing method including a step of providing unevenness on the tab.

The synthetic resin film used in the production of the container according to the present invention is a laminated film of heat-sealable resin such as polyethylene or polypropylene and nylon in order to satisfy both heat-sealability and strength. Is preferred. Further, the material of the lid material may be any material as long as it can be heat-sealed with the synthetic resin film forming the container, and normally synthetic resin film or paper treated with a primer is used. The unevenness of the unsealing tab can be provided on the lid member, the unsealed portion of the container, or both.

In the present invention, the opening tab portion is
The above-mentioned film-side end portion is located outside the end portion of the lid member, or as proposed by the applicant of the present invention, the opening tab portion is thermoformed into a concave or convex shape. Although it is also possible to use a special opening, even if such a special shape is not used, it is possible to open and close the opening by providing unevenness on the opening tab having a normal shape as shown in FIG. An easy package can be obtained.

The shape, size, arrangement, etc. of the unevenness are not limited to specific ones as long as they give unevenness of a sufficient depth so that opening can be performed easily. However, as shown in FIG. 1, the one in which a plurality of independent irregularities are provided in the lateral direction has an advantage that it is excellent in its unsealing property, is easy to form, and is excellent in its aesthetic appearance. Yes, it is preferable. Further, the number of the uneven portions can be appropriately determined in consideration of the size of the opening tab, the size of the unevenness, the arrangement thereof, and the like. When the irregularities exist independently of each other, the distance between them is appropriately determined in consideration of the ease of opening the package. As described above, it is preferable that the plurality of irregularities are independent of each other, but even if they are continuous, the object of the present invention can be achieved. As a means for forming these irregularities, it is a simple method to use a plurality of protrusions provided in the mold at the same time as deep drawing, but it is suitable for deep drawing and suitable for producing irregularities. The conditions are not necessarily the same, and in such a case, the unevenness is formed by using a conventional means for forming the unevenness such as embossing as a separate step before or after deep drawing. Is good. Further, the uneven portion may be provided on the lid member, and in this case, for example, a member having an uneven portion provided in advance by a conventional means may be used. As described above, the present invention is greatly characterized in that the opening / closing tab is provided with the uneven portion.

[0009]

EFFECT OF THE INVENTION The present invention can provide a package which can be easily opened with a simple structure by providing unevenness on the opening tab, and the package is particularly suitable for packaging disposable medical devices. ing.

[Brief description of drawings]

FIG. 1 is a diagram showing a structure of a package of the present invention.

[Explanation of symbols]

 1 container part 2 lid material 3 uneven part 4 tab part for opening 5 seal part

Claims (1)

Claims: What is claimed is: 1. A container comprising a container made of a deep-drawn synthetic resin film for housing articles, and a lid member, the peripheral portions of which are heat-sealed. A packaging body which is formed with an unsealed portion of a container and a lid material on the outer side of the container, and has an opening tab formed thereon, and the tab portion has a plurality of irregularities.