JPH0343358A - Filling and sealing bag and film for use in forming same - Google Patents

Abstract

PURPOSE:To secure saleability and provide various unsealing patterns according to the kinds of packaged contents by a method wherein small dents are collectively provided on one layer of laminated film and arranged into the form of a strip so wide and long as to be recognizable with the naked eye and the strip-shaped region of the dents is located in the position other than sealed parts and scores. CONSTITUTION:A group of dents 5 is provided in film laterally at predetermined intervals and arranged into the form of a strip. The interval at which the dents are arranged is almost equal the longitudinal length of a bag. By using this film, a filling and sealing bag having a circular arc-shaped group of the dents 5 close to one side of lateral sealed parts 3 is obtained. By pulling out the lateral sealed parts 3 of this bag, its top edges are separated readily to make the top of the bag wide open. Such group of the dents 5 may be provided about half around the bag instead of its entire periphery.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is applicable to sealed filling bags or tray packaging, which can be opened in a ring shape by simply pulling the fused portion at the top, and the contents can be easily taken out. The present invention relates to a hermetically sealed filling bag that can be opened from the center without disturbing the arrangement of the contents in its normal position.

[Conventional technology]

Traditionally, sealed and filled bags use high-strength films such as polyester or nylon when the strength of the bag itself is required, but since these films have poor heat sealability, low-density polyethylene with a low softening temperature is used. , ethylene-vinyl acetate copolymer, etc. are used in a laminated manner. Since these bags are strong, they are almost completely sealed, but they have the inconvenience of being impossible to break without using a knife to open them.

For this reason, ■-notches and V-notches were provided, but these were difficult to find, and even if they were found, there was a drawback that they could not be cut, and if a large number of them were provided in case of failure to cut, the strength of the bag itself would be compromised, so this is not a preferable method. Ta.

In order to improve these drawbacks, Japanese Patent Publication No. 39228/1983 discloses a method of forming fine scars densely along the edge line of the fused portion of the bag as a method for opening sealed and filled bags. There is. Furthermore, there is a method of forming a group of fine scars in a dense manner around the bent part of the sealed bag other than the fused part, as disclosed in Japanese Patent Application Laid-Open No. 1-36.
It is disclosed in Japanese Patent No. 435.

There are also sealed bags that not only have an opening, but also have tape or thread fused in a ring shape and one end left as a grip in order to make it easier to take out the contents. When you pull the knob, it runs along the tape or thread and can be cut in a circular shape.

Furthermore, there is also a method known as half-cutting, in which a degraded area is created in the film by arranging cuts in a line that do not penetrate through the film but stop in the middle of the film, and by pulling this area, the bag is opened wide at once.

[Problem to be solved by the invention]

However, the method of providing scar groups requires careful positioning in order to provide the scar groups in the correct position on the film. In addition, although bags containing tape or thread are in a desirable state after opening, they require a lot of effort to manufacture and are not suitable for the general public. The sealing of the bag will be impaired.

Furthermore, there is no easily opened sealed filling bag that is suitable for opening from the center like a tray package.

Therefore, there has been a need for a hermetically sealed bag that can be opened at any length from any part of the bag at once.

[Means of problem solving]

The present invention aims to solve the above-mentioned problems, and is configured to provide at least an IN film of a laminated film consisting of two or more types of films! A sealed filling bag with a group of small scars arranged densely in a band shape with a width and length that can be recognized with the naked eye, and the band area is in a part other than the fused part or fold part of the bag. It is characterized by

The film in the present invention may be a laminated film.

Preferably, a melting layer film having a low melting temperature such as low density polyethylene or ethylene-vinyl acetate copolymer is laminated on the inner layer, and polyester, nylon, polypropylene, etc. are used for the other layers. The film is not limited to a resin film, and may be a laminate of films made of other materials such as metal films such as aluminum foil, paper, and nonwoven fabric.

A large number of scars are provided in the form of bands on at least one layer of this film, preferably on other layers except the inner layer.

Scars are minute scratches that are almost invisible to the naked eye, and can be created by pressing the abrasive grain surface, but they can also be created by pressing a metal plate or roll that has many protrusions with semicircular tips. It is especially sharp when provided. The scars obtained can be either penetrating or non-penetrating, but most of them are penetrating. Even if there is no penetration, the effect of the present invention can be achieved because the portion has been reliably deteriorated. When such scratches are densely arranged in a band-like manner, this area reflects light diffusely, giving it a whitish appearance that is visible to the naked eye.
Become able to understand. If a large number of parts are provided so that they can be recognized with the naked eye, and there is a risk that the strength of the bag will be adversely affected, this part can be made recognizable by coloring or other means. The film subjected to the above processing is further laminated with an intact film that has not been subjected to any processing. Therefore, there are no penetration parts in the film as a whole, and the airtightness is not adversely affected.

Processing can be done before or after printing the film, or it can be done just before lamination, or if the film has two or more layers, it can be done as a whole laminated film, and especially for tear resistance. It is possible to process only the film with a large value. Furthermore, each film may be processed individually and then laminated. In this case, it is preferable that the processed parts match. In addition, even if a disc-shaped roll with protrusions on the periphery is pressed in the length direction of the film to form scar groups in a vertical strip, it is also possible to press a similar wide roll intermittently to spread the scar groups horizontally. It may be provided in a strip shape in the direction.

In order to provide band-shaped scar groups, one row or two or more rows may be provided for one row of the sealing bag film. For example, if a row of scars is placed approximately midway between the fused parts, the vertically fused part is the center of the bag, and if food etc. is stored in a tray and then fused horizontally, the scar group will be on the tray. Comes to the top. When opening the package, by pinching the band of scars and pulling both sides, the tray can be torn from the center and the contents of the tray can be taken out little by little without changing the shape of the tray. This method is not limited to tray packaging, but can expose the contents at once from the center of other packaging products.

Furthermore, two band-shaped scar groups may be provided on the front and back surfaces of the bag, respectively. In this case, by pinching both ends of the bag and pulling it in the open direction, the bag will be divided into two parts and the entire contents will be exposed at once. Therefore, when packaging one or several bulk items, there is no need to remove the contents from the bag. In this case, it is preferable that the bands of the scar groups on the front and back surfaces are in the same position, but there is no problem even if they are slightly shifted.

Furthermore, a band of scar groups may be provided on one or both of the areas slightly inside the area that is to become the fused portion of the bag. In this case, if the bottom of the bag is a folded part and the other three sides are fused, a band of scar groups can be provided on both or one side of the bag near one fused part. If it is set on both sides and the position matches,
When opening the package, if you pull the fused part near the scar group, the top part will come off and open into a large cylindrical shape. This method is suitable for side-fill packaging.

[Effect]

In the present invention, a group of scars is provided in a strip shape only on a film with particularly high tear resistance, and the film is laminated with a heat-sealing film that does not provide any scars, so that sealing performance is ensured. By providing it at any part other than the white folding area, various opening forms can be taken depending on the contents of the package. Moreover, since the permissible range of the part where the scar group is to be provided is wide, positioning during processing is easy.

Furthermore, since heat-fusible films generally have slight air permeability during storage, storage of products that continue to have physiological effects even after harvesting, such as mushrooms and vegetables, improves their shelf life. Similarly, when packaging products such as soaps that gradually generate a quantity of gas over a long period of time, these gases can be released.

〔Example〕

Fig. 1 is a perspective view with the contents of the tray package omitted, Fig. 2 is a perspective view of the bag shown in Fig. 1 in an unsealed state, and Fig. 3 is an enlarged sectional view of a portion of the film where a group of scars are provided. .

1 has a sealed filling bag, and the tray 2 stored inside is shown by a broken line. 3 is a horizontally fused portion, and what is slightly visible in the center of the horizontally fused portion 3 is a vertically fused portion 4. In FIG. 1, the vertically fused portion 4 is located on the back surface and is hardly visible.

A scar group 5 was provided on the surface opposite to the vertically fused portion 4. Scar group 5
As shown in FIG. 3, the adhesive layer film 7 is laminated on the base film 6, and the base film is provided with scars 8. The scar 8 was processed using a metal tool having a large number of protrusions as disclosed in Japanese Patent Application Laid-Open No. 61-142133, and then laminated with the adhesive layer film 7.

When opening the package, by pulling the film on both sides across the scar group 5, the center part opens at once as shown in FIG. 2, and the fish 9 inside can be easily taken out.

FIGS. 4 and 5 are perspective views of another example in which the contents are omitted, and scar groups 5 are provided in the form of bands at regular intervals in the lateral direction of the film. The intervals at which the scar groups are provided are approximately the same as the vertical length of the bag. When a filling and sealing bag was manufactured using this film, a bag having an annular scar group 5 near one side of the horizontally fused portion 3 as shown in FIG. 4 was obtained. When the horizontally fused portion 3 of this bag is pulled, the top part can be removed at once as shown in FIG. 5, allowing a wide opening. Note that the scar group 5 may not be provided all around the bag, but may be provided around half the circumference.

The method shown in FIGS. 6 and 7 is a more preferred embodiment. As shown in FIG. 7, scar groups 5 were provided in two rows in the longitudinal direction of the film close to the region 12 that was to become the fused portion. When this film 10 is manufactured into a sealed filling bag l using an ordinary automatic bag making and filling machine, a sealed filling bag having a bottom fold line 11 at the bottom as shown in FIG. 6 is obtained. This bag can also be opened in an annular shape by pulling the upper fused portion 12.

By selecting the part where the scar group is to be provided on the film 10,
The opening site can be adjusted depending on the contents. If only one row of scars is provided on the film 1, the top cannot be cut off, but a large opening can be formed.

〔Effect of the invention〕

The present invention facilitates positioning when processing scar groups. Moreover, various opening forms can be adopted depending on the contents.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view of a sealed filling bag, FIG. 2 is a perspective view of the bag in an unsealed state, FIG. 3 is a sectional view of the film, FIG. The figure is a perspective view of the bag in an unsealed state, FIG. 6 is a perspective view, and FIG. 7 is a plan view of the film for manufacturing the sealed filling bag of FIG. 6. In the drawings, reference numeral 1 indicates a sealed filling bag, 2 indicates a tray, 3 indicates a horizontally fused portion, 4 indicates a vertically fused portion, 5 indicates a group of scars, 6 indicates a base film, 7 indicates a fusion layer film, 8 indicates a scar, 10 is a film, 11 is a bottom fold line, and 12 is an upper fusion part.

Claims (2)

[Claims] (1) A sealed filling bag in which at least one layer of a laminated film consisting of two or more types of films has a group of minute scars densely formed in a band shape with a width and length that can be recognized with the naked eye. A sealed filling bag characterized in that the band-shaped region is a part other than the fused part and the folded part of the bag. (2) A film for manufacturing a sealed filling bag as set forth in claim (1), wherein the film is prepared in advance so that, when the bag is made, the band-shaped area of the scar group is located in a region other than the fused portion and the folded portion of the bag. A film used for sealed filling bags that has a band of scars on a single layer of film.