JPS62193975A - Easily unsealable packaging vessel or packaging bag - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides an easy-to-open packaging container or packaging bag, which is provided with two protruding seal parts at the opening portion of the packaging container or packaging bag that is sealed in a loop shape. Regarding.

[Conventional technology]

In recent years, packaging containers have been sealed by heat-sealing a lid material to the opening flange of a cup-shaped container made of synthetic resin, or bags are being made by heat-sealing two sheets or film materials in a loop shape. It has become common to perform seals.

However, these loop-shaped heat seals have contradictory dualities: they need to provide strong adhesion, good sealing, and high packaging safety, but they also need to be easy to open during use. Two objectives had to be achieved at the same time.

Conventionally, as shown in FIG. 4, in order to reduce the adhesive force by reducing the distance between the adhesive surfaces at the initial stage of opening and separation, a loop-shaped seal is formed between the seven rungs 12 of the container body 11 and the periphery 14 of the lid 13. A part of the portion 15 is formed into a protrusion 15a (Japanese Unexamined Patent Publications +1/15B-64970, 59-1312)
), or, as shown in FIG. 5, the opening portion of the seal portion 17 of the packaging bag 16 is cut into two protruding pieces 17a (specially Publication No. 55-35310) etc. have been proposed.

[Problems to be solved] The conventional device described above has the following problems.

In other words, although these easy-to-open containers have the effect of reducing the opening force at the initial stage of peeling and making it easier to open, the fact that they can be opened with a low peeling force does not mean that they have a reliable seal. Inadequacies remained, and there were major problems in terms of safety and hygiene, especially in containers that required airtightness. In addition, since the package is opened using peeling force from one direction, it is easy to open the package by mistake, and to prevent this, it is necessary to take measures such as double packaging.

In addition, flanged containers with protruding seals are
This part of the lid material tends to curl, resulting in poor appearance and lowering the product value, as well as making it difficult to open the lid.

The present invention has been made in view of the above-mentioned problems.The present invention strengthens the adhesive force of the sealing part to ensure reliable sealing without impairing the ease of opening, and also prevents accidental opening by opening in two stages. To provide an easy-to-open packaging container or packaging bag which prevents curling of protrusions and further prevents deterioration of commercial value by eliminating curling of protruding pieces.

[Means for Solving Problems] In order to achieve the above object, the easy-to-open packaging container or packaging bag of the present invention has a part of the sealing part that seals the periphery of the packaging container or packaging bag in a loop shape, which protrudes outward; In addition, two acute-angled protruding seal portions facing each other and slanting inward are formed at a predetermined interval.

[Examples] Examples of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show examples of packaging containers, with Figure 1 being a perspective view of the lid partially unsealed, and Figure 2 being a plan view of the lid partially cut away. It shows. In these drawings, l is the container body, which is molded into a cup shape from a thermoplastic resin material or the like. A flange portion 2 with a wider opening portion 2a is provided on the periphery of the opening of the container body 1. Reference numeral 3 denotes a lid member, which has the same planar shape as the container main body l including the flange portion 2, and its peripheral edge 4 serves as a sealing surface with the container main body flange portion 2.

The seal portion 5 formed by heat fusion between the flange portion 2 of the container body l and the peripheral edge 4 of the lid member 3 has a ring shape as a whole, and
Two protruding seals fi on the wide periphery of the opening point 2a
5a is formed. These two protruding seal parts 5a are
The tip is formed with an acute angle and protrudes outward. By making the tip of the protruding seal portion 5a acute-angled in this manner, even if the seal portion 5 is strongly fused, the seal portion 5 can be removed by peeling from the acute-angled tip along the center of the protruding seal portion 5a. Can be opened easily.

In addition, the distance between the two protruding seal parts 5a (1 is in the range of 10 degrees to 45 degrees, preferably in the range of 15 degrees to 40 degrees. In this way, the peeling force due to opening from only one direction , the resistance force of both protruding seal parts 5a becomes stronger and it becomes difficult to peel off at the same time, and both protruding seal parts 5a are moved one step at a time from the respective inclination directions, that is, from the forward direction of A and A in FIG. With respect to the peeling force when opening the package separately, the resistance becomes weaker and it becomes easier to peel off.

Furthermore, these protruding seal parts 5a have an angle (φ) between 5 degrees and 30 degrees between the center line of the container passing through the tip and the inner side extending from the tip to the loop-shaped seal part 5, and both protruding seal parts 5a The two sides are tilted inward and facing each other.

In this case, it usually takes time to open the package from only one direction. In FIG. 2, the resistance force of the one-sided protruding seal portion 5a against the force from the direction 21 becomes stronger, making it difficult to peel off. Further, if the inner side of the protruding seal portion 5a is formed into a circular arc, particularly a concave circular arc, the protruding seal portion 5a will have a strong resistance to peeling force from directions other than the forward direction, and will be difficult to peel off.

As described above, according to the packaging container of this embodiment, if the two protruding seal parts 5a at the unsealing location are opened in two stages in the direction of A and the mouth, or in the direction of the mouth and A, the lid material 3 can be removed from the container. It can be easily peeled off from the main body l. On the other hand, in the case of opening from a direction other than 1, the lid material 3 is opened from the container body 1.
Therefore, it is not necessary to provide a weak adhesive part in the loop-shaped seal part 5, so that the seal's sealing performance can be sufficiently ensured, and safety can be improved by preventing accidental opening, etc. You can also do it. Furthermore, since the protruding seal portion does not protrude to the outside of the container, there is no loss of aesthetic appearance due to curling of the seal portion.

FIG. 3 shows an embodiment of the packaging bag, and shows a front view with one side of the bag partially cut away.

In this drawing, 6 is a bag body of a packaging bag.

It is molded using a thermoplastic resin film with a wide sheet surface 6a provided on the opening side.

The heat-sealed seal portions 7 of the bag 6 are formed in a rectangular shape around the four sides, and two protruding seal portions 7a are formed on the wide sheet surface 6a at the opening portion to protrude outward. These two protruding seal parts 7a, like the protruding seal part 5a of the packaging container described above, have acute-angled tips, and the interval (0) between the protruding seal parts 7a is 10 degrees to 45 degrees (preferably 15 degrees). 40 degrees). Similarly, the angle between the bag center line and the inner side (φ
) is also set at 5 degrees to 30 degrees, and both the protruding seal portions 7a are inclined inward and face each other. moreover,
The inner side is also a concave arc.

Therefore, in the case of this embodiment as well, the bag body 6 can be easily peeled off by sequentially opening the two protruding seal parts 7a at the opening point in two stages in the direction of A and the mouth or in the direction of the mouth and A. On the other hand, if the bag is opened from a direction other than the above, the bag body 6 cannot be peeled off easily. Not only can sufficient security be ensured, but also safety can be increased by preventing accidental opening.

Also, since the protruding seal part does not protrude to the outside of the bag,
There is no loss of beauty due to curling of the seal.

In the case of a packaging bag, it is also possible to fold a sheet of film in two and form the seal portions 7 on the other three sides, as well as the protruding seal portion 7a on the negative side. It is a pilgrimage.

The present invention is not limited to the above-mentioned embodiments, but also includes modifications such as first order.

■ Packaging containers and packaging bags whose seals are sealed using adhesives, etc., other than heat-sealing; in this case, various materials may be used for the container body, lid material, and bag body. Can be used.

(2) The planar shape of the packaging container or packaging bag is variously angular or circular; in this case, the loop shape of the seal portion also changes accordingly.

[Effects of the Invention] As described above, according to the present invention, sufficient sealing performance can be ensured while maintaining ease of opening, and the safety of the contents of the container or bag can be improved. Also,
It is possible to prevent erroneous opening of the package.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the packaging container according to the present invention in a partially unsealed state, FIG. 2 is a plan view of the lid of the packaging container partially cut away, and FIG. 3 is the present invention. FIG. 4 is a perspective view of a conventional lid material of a packaging container partially opened, and FIG. The front view of a conventional packaging bag with the - side partially cut away is shown. l: Container body 2: Flange part 5: Seal part 5a: Projecting seal 6: Bag body
7: Seal portion 7a: Protruding seal portion

Claims (4)

[Claims] (1) Two acute-angled protruding seal parts protruding outward and slanting inward and facing each other are formed at a predetermined interval on a part of the seal part that seals the periphery of the packaging container or packaging bag in a loop shape. An easy-to-open packaging container or packaging bag characterized by: (2) The angle defined by the inner side of the protruding seal portion and the center line of the container passing through the tip of the protruding seal portion is between 5 degrees and 30 degrees. Easy-open packaging containers or packaging bags. (3) The easy-open packaging container or packaging bag according to claim 1 or 2, wherein the inner side of the protruding seal portion is a concave arc. (4) Claims 1, 2, or 3, characterized in that the loop-shaped seal portion is a line seal.
Easy-open packaging containers or packaging bags as described in Section 1.