JPS601102Y2 - Easy-open packaging - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a package that is easy to open.

The methods used to open a sealed package include cutting it with scissors, or making a notch or notch in the seal in advance and opening it from there, but when traveling etc. etc., and in the case of a package with a notch etc., the front and back layers are opened at the same time, so it may be difficult to open the package due to its thickness or layer structure. Diagonal cuts may occur or the package may be opened.

Since the back layer is coated at the same time, there are problems in that the opening position cannot be arbitrarily selected, such as at the top of the package.

For this reason, the present inventor devised an easy-to-open package in which only one film layer on the front or back layer can be opened with a fixed width, regardless of the layer structure, and the opening position can be arbitrarily selected. Invented the body.

The packaging of the present invention may be a bag that may or may not stand on its own, and a circular or square packaging with sealed sides or top.

The packaging of the present invention can be applied to and used for either a composite film with the same structure, that is, a packaging that uses one composite film, or a composite film that has a layered structure, that is, a packaging that uses two composite films. The composite film is a composite film that includes a uniaxially stretched film in its structure.

The structure of the seal layer is such that it has sufficient sealing strength to completely protect the contents during the product manufacturing and distribution process, and can be opened without destroying the film when removing the contents. For example, in the case of the same configuration, the sealing surface composition may be PP that is easy to open, or PE that has a sufficient seal, such as a blended resin layer of PE and ethylene-propylene rubber.
Single resin layers such as , PP, ionomer, EVA, PVC, and PS can be used, and in the case of a layered structure, the sealing surface composition can be EVA/ionomer or ionomer/PE or E.
A blended resin layer of VA/PE (!: PP) is used as the material for the sealing layer, but the composite film used in the packaging of the present invention consists of (sealing layer, ten-axis stretched film layer + base material layer). Composite films depending on the structure are often used, but a -axially stretched film layer is sometimes used as a sealing layer or a base material layer, and in this case, a composite film with a two-layer structure is obtained.

In a package using a composite film with a layered structure, one side of the film has the above structure and the other side of the film is a composite film of only an unstretched film that does not contain a uniaxially stretched film, and the easy-to-open package of the present invention is used. You can also create .

The term ``axially stretched film'' here refers to a film that has been stretched only in one direction, and also refers to a biaxially stretched film that is more oriented in either the vertical or horizontal direction due to differences in stretching ratio, etc., making it more likely to tear. It includes.

An embodiment of the package according to the present invention is shown in FIGS. 1 to 8, and includes a uniaxially stretched film in a composite film having the same or layered structure, and a seal portion 1 in the stretching direction of the -axially stretched film. A part of the unsealed part 2 is provided inside the unsealed part 2, and two slit lines or a perforation line 3 for starting opening are provided in the unsealed part 2.
, and this non-sealed part is provided at one location either in the left-right direction or the top-bottom direction of the package (Figure 1), or if it is provided in two locations in the left-right or top-bottom direction (Figure 3).
Furthermore, depending on the application, if the tape 4 is applied on a surface in a constant parallel width direction including the non-sealed part 2 (Fig. 4)
If you try to open the package by taking advantage of the difference in seal strength without using the opening start line, as shown in Figure 5, the seal strength of the upper and lower parts 5 of the non-sealed part 2 is strong, and The package is sealed so that the sealing strength of the left or right portion 6 is weak, and furthermore, as shown in FIG. There are packages having a partially sealed portion 8 located at , and the opening direction of these packages is parallel to the seal portion orthogonal to the seal portion having the non-sealed portion. There is a package shown in FIG. 7 in which the starting direction is perpendicular to the sealed portion having the non-sealed portion and the diagonal direction.

Note: The unsealing start line 3 is provided on either film surface & of the structure including a uniaxially stretched film.

・ ::・ When the package of the present invention is opened at the opening start line, the state is as shown in FIG.
When the film is grasped and pulled, a tearing piece 10 is generated along the width between the two slit lines or perforations, and when the tearing force is applied sequentially, the film contains a uniaxially stretched film and the opening direction and the uniaxial stretching direction are Since they are regulated in the same direction, the seal layer on one side peels off and is opened in the seal part 1, and the seal is opened sequentially with the width of the opening piece, and then the other seal part 1:','
7rf opening will stop.

In addition, PE, PP, ionomer, or EVA with strong inner core in the non-sealed part like 2A in Fig. 3.

It is often used when PS or the like is used for the sealing surface, and it is also used when the contents do not require much barrier properties.

When non-sealed portions are provided on both sides (FIG. 3), the entire film layer on one side is peeled off by the width of the opening piece.

In the case of a package in which the tape 4 is applied on a surface with a constant width and force direction including the non-sealed part, the package is opened and the unsealed part is re-sealed, the format shown in Fig. 4 is used. Since the width is surprisingly wider than the width of the opening strip 10, when the tape is opened and the tape is held to close it, it becomes resealed, resulting in a recloseable packaging form.

The tape is coated with a hot-melt adhesive or the like and is made of a material that can be resealed.

An example of a package in which no opening line is provided in the non-sealed part is as shown in Figure 5, where the upper and lower parts 5 of the non-sealed part 2 have strong sealing strength, and the parts 2 to the left or right of the non-sealed part 2 have weak sealing strength. By varying the strength of the seal and the strength of the seal, the boundary between the strong seal strength and the non-sealed part is sealed with a strong seal force, resulting in a seal in which the film surface on one side is easily broken. Utilizing the second effect, the seal can be opened starting from the unsealed part 2 and including the weak part 6 of the seal.

When a package is sealed on only one side using a single film, the entire circumference of the package is opened as shown in FIG.

In addition, when it is intended to open only a portion of the package, as shown in FIG. 6, there is a package having a single seal portion 8 located below the seal portion in one seal portion 7 perpendicular to the seal portion 1 having the non-seal portion 2. The package is opened at the position shown by the broken line, and the package stops at the sealed portion 7 below the non-sealed portion, leaving only a portion of the package unsealed.

Note that the opening direction is generally parallel to the sealed part that is orthogonal to the sealed part that has the non-sealed part as shown in Figures 1 to 6, but when the composite film containing the -axis stretched film is opened not in the parallel direction but in the diagonal direction. The configuration when used in the state shown in Figure 7 is as shown in Figure 7, and the opening direction is diagonal as shown by the dotted line with respect to the sealed part that is perpendicular to the sealed part that has the non-sealed part. become able to.

In this way, the package of the present invention is a package devised so that, regardless of the layer structure, only the film layer on one side of the front or back layer can be opened with a certain width, and the opening position can be arbitrarily selected. This is an easy-to-open package with features not found in conventional packages.

[Brief explanation of drawings]

1 to 8 are illustrations of embodiments of the packaging body of the present invention.

Claims (1)

[Scope of utility model registration request] In a package obtained by sealing a composite film, the composite film structure includes a uniaxially stretched film, a part of the sealed part in the stretching direction of the -axially stretched film is provided with a non-sealed part, and the unsealed part is provided with a part of the sealed part in the stretching direction of the -axially stretched film. Two opening start lines are provided, and a tamper-preventing seal portion is provided below the position of the double seal portion in the seal portion orthogonal to the seal portion having the partially unsealed portion. Easy-to-open packaging.