JPH1053258A - Resealable packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resealable packaging bag which is extremely easy to open and reseal and has good sealing properties with a simple structure and at a low cost. SOLUTION: A packaging bag 11 is formed by superposing two substantially congruent thermoplastic plastic films 21 and 21 and heat-sealing the left and right sides and the lower part thereof. In this case, a pair of opening / closing portions 13, 13 are provided so as to face each other by bonding a belt-shaped magnet sheet to each predetermined position of the plastic film in advance, and these opening / closing portions form an article entrance / exit. The article opening is closed by bringing the opening and closing sections into close contact with each other by the magnetic force, and the article opening is opened by pulling apart.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag in which articles in a bag are repeatedly taken out little by little, and after taking out the bag, the bag is re-sealed. The present invention relates to a resealable packaging bag having excellent sealing properties.

[0002]

2. Description of the Related Art Hitherto, as a resealable packaging bag for packaging an article which dislikes moisture, a packaging bag made of a moisture-proof plastic film or a laminated film having low water vapor permeability is known. (1) One that is sealed with double-sided adhesive tape, (2) One that turns the end of the bag and seals it with tape, (3) One that is opened and resealed with a patch and so on.

On the other hand, for example, Japanese Patent Application Laid-Open No. Hei 5-221454 discloses a packaging bag excellent in resealability, in which an article outlet is formed by providing a self-adhesive resin layer. Also, in JP-A-6-32359, a tape-like delamination material is provided at an article access port,
There is disclosed a packaging bag that reseals by utilizing the adhesiveness of the release material.

[0004]

However, the above (1) to (1)
In the resealable packaging bag of (3), although the article opening is easily opened, the operation for resealing is troublesome, it is not easy to reseal with one touch, and the resealability after resealability is poor. There was a problem of chipping. For this reason, even if the bag is made of a highly moisture-proof material, there is a drawback that ambient moisture, dirty air, dust, and the like easily enter the bag body. Further, the resealable packaging bag described in the above publication has a problem that it is difficult to provide it at low cost because of its complicated structure.

Accordingly, it is an object of the present invention to provide a resealable packaging bag which is very easy to open and reseal and has good sealing properties for articles (contents) with a simple structure and at low cost.

[0006]

According to a first aspect of the present invention, there is provided a re-sealable packaging bag, wherein an article opening / closing portion is formed by film-like opening / closing portions facing each other, and the opposing surfaces of these opening / closing portions are brought into close contact with each other. A packaging bag for closing or opening an article entrance by separating the opening and closing, wherein the opening and closing portions are closely adhered to each other by magnetic force. In the present invention, “film” includes films and sheets in a narrow sense.

The resealable packaging bag according to the second aspect is characterized in that, in the first aspect, both of the open / close portions facing each other are made of a thermoplastic plastic film mixed with a magnetic powder.

The resealable packaging bag according to the third aspect is characterized in that, in the first aspect, both the opening / closing part and the article storage part facing each other are made of a thermoplastic plastic film mixed with magnetic powder. .

According to a fourth aspect of the present invention, in the resealable packaging bag according to the first aspect, both of the opening and closing portions facing each other are formed by bonding and laminating a magnet sheet on a thermoplastic plastic film, and the magnet sheets are directly adhered to each other. It is characterized by that.

According to a fifth aspect of the present invention, in the resealable packaging bag according to the first aspect, both of the opening / closing portion and the article storage portion facing each other are formed by bonding and laminating a magnet sheet on a thermoplastic plastic film. In the opening / closing section and the article storage section, the magnet sheets are directly in close contact with each other.

In the resealable packaging bag according to the first to fifth aspects, the opening and closing portions are closely adhered to each other by magnetic force, so that the opening and resealing of the article entrance can be easily performed with one touch, and the resealing can be performed. The later sealability is also sufficient.

Further, in the resealable packaging bag of the third and fifth aspects, the films forming the article storage portion are brought into close contact with each other by magnetic force, so that the films come into close contact with each other even in the vicinity of the stored article. In addition, the movement of the article in the article storage unit can be restricted.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. Example 1 FIG. 1 is a front view of a packaging bag, showing a state in which an article access port is sealed. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. FIG. 4 is an enlarged view of a portion C (opening / closing portion) in FIG. FIG. 5 is a development view of a packaging bag material for producing the packaging bag of FIG. FIG. 6 is a longitudinal sectional view showing a state in which the article entrance of the packaging bag of FIG. 1 is opened.

The packaging bag 11 is entirely formed of a thermoplastic plastic film 21 (preferably having excellent moisture proof properties), and a magnetic force is applied only to the opening / closing portion 13 forming the article entrance 12 (see FIG. 6). The magnetic force causes the opening / closing portions 13 to come into close contact with each other or to separate the opening / closing portions 13 from each other, thereby closing or opening the article entrance 12. The plastic film 21 can be appropriately selected from known packaging films.

In the packaging bag 11, as shown in FIGS.
Is heat-sealed (heat-sealed) on both left and right sides and a lower portion (see FIG. 1) to form an article storage portion 14. Reference numeral 15 denotes a heat seal portion.

As shown in FIG. 4, the opening / closing section 13 is
The magnet sheet 22 is adhered to the inner surface of the packaging bag 11 only by bonding the magnet sheet 22 to the predetermined position on one surface of the plastic film 21 (article entry / outlet formation position) with the adhesive 23. Then, the magnet sheets 22 and 22 are directly in close contact with each other by being directly opposed to each other.

The packaging bag 11 is made from a web 31 shown in FIG. The web 31 is formed by bonding a strip-shaped magnet sheet 22 to an upper portion of a long plastic film 21 along the longitudinal direction thereof with an adhesive 23. That is, the web 31 is cut into a predetermined length (a portion shown by a solid line in FIG. 5), and the cut piece 32 is cut into the center line l.
Is folded as a folding line, and the dotted pattern portion is heat-sealed to produce the packaging bag 11 of FIG.

In the packaging bag 11, the opening and closing members 13 and 13
6 can be opened (formed) as shown in FIG. 6 by pulling them apart against the magnetic force.
Also, as shown in FIG. 1, the upper end portion (immediately above the opening / closing portion 13) of this packaging bag 11 is heat-sealed. Therefore, the opposing films 21 and 21 in this portion are easily opened by pinching and separating them. be able to.

In order to prepare a packaged product using the packaging bag 11, the article opening 12 is opened, and after the articles are stored,
The upper end of FIG. 1 (directly above the opening / closing section 13) may be heat-sealed. When removing a part of the article, the article opening 12 is opened after removing the heat seal portion.

In order to seal the article inlet / outlet 12, the opposing opening / closing portions 13, 13 may be pressed down, and these are brought into close contact by magnetic force. Note that the size and the like of the portion having magnetic force can be easily changed by changing the size and shape of the magnet sheet 22 and the position of adhesion to the plastic film 21.

Embodiment 2 FIG. 7 is a front view of a packaging bag, showing a state in which an article entrance is sealed. 8 is a sectional view taken along line DD of FIG. 7, and FIG. 9 is a sectional view taken along line EE of FIG. FIG. 10 shows FIG.
It is a longitudinal cross-sectional view which shows the packaged goods produced using the packaging bag of FIG.

The packaging bag 51 is entirely cut from a raw material of a thermoplastic plastic film in which magnet powder (magnetized magnetic powder, for example, hard ferrite powder is magnetized) is mixed and dispersed (not shown). ), A magnetic force is applied to the entire packaging bag 51, and an upper end portion thereof is used as an article entrance 52. That is, the packaging bag 51 is manufactured by folding the cut piece with its center line as a folding line, and then heat-sealing the dotted pattern portion (see FIG. 7).

In FIG. 7, reference numeral 54 denotes an article storage portion, 55 denotes a heat seal portion, and 56 denotes a fold of the plastic film 61. The raw material is obtained by mixing a thermoplastic material and the magnet powder and molding the mixture by a T-die method, an extrusion method, an inflation method, or the like.

Almost the entire packaging bag 51 is sealed by magnetic force, and the article outlet 52 can be opened by separating the upper end portion against the magnetic force.
In order to produce the packaged article 81 shown in FIG. 10 using the packaging bag 51, the article outlet opening 52 is opened, the article 71 is stored, and then the upper end of the packaging bag 51 is heat-sealed.
When taking out a part of the article 71, after removing the heat seal portion, the article slot 52 is opened. If the article entrance 52 is sealed, the system returns to the form of FIG.

In another embodiment of the present invention, as a further embodiment, a magnet sheet 22 may be adhered to the entire surface of the thermoplastic film to form a raw material, and the entire packaging bag may be formed by cutting the raw material. . In this case, instead of the heat seal portion 15 in FIG. 1, an adhesive portion using an adhesive is used. In this packaging bag, almost the whole is in a sealed state by magnetic force, similarly to the packaging bag 51 of FIG.

Further, a paint in which magnet powder is mixed and dispersed is applied to one or both surfaces of a thermoplastic film, and then dried to obtain a raw material, and the entire packaging bag is formed by cutting the raw material. Is also good. Further, the opening / closing section can be provided by collecting a strip-shaped cut piece from the above-mentioned raw material and heat-sealing the cut piece at a predetermined position of the packaging bag body, or by bonding with an adhesive.

Further, in the above embodiment, the entire packaging bag is formed of a single-layer thermoplastic plastic film, but a moisture-proof and heat-resistant laminated film can be used instead. Alternatively, a paper packaging bag can be used.

[0028]

As is apparent from the above description, claim 1
In the resealable packaging bags described in Nos. 1 to 5, since the opening / closing portions are brought into close contact with each other by magnetic force, after taking out the article, the article opening / closing port can be resealed with one touch by lightly pressing the opening / closing portion. it can. In addition, by pulling apart the opening and closing part, it can be easily opened,
The sealing performance after re-sealing is also sufficient. As described above, the re-sealable packaging bag of the present invention can reduce the amount of moisture or the like entering the article storage portion at the time of opening, so that articles that dislike moisture or articles that are taken out and used little by little It is suitable for packaging. In particular, if the article storage section is formed of a moisture-proof film, the article can be kept dry and clean for a long time.

According to the resealable packaging bag of the third and fifth aspects, the films forming the article storage portion are also brought into close contact with each other by magnetic force, so that the films are also formed in the vicinity of the stored articles. Due to the close contact, the movement of the article in the article storage section can be restricted.

[Brief description of the drawings]

FIG. 1 is a front view of a packaging bag according to a first embodiment of the present invention, showing a state where an article entrance is sealed.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an enlarged view of a part C (opening / closing part) in FIG. 2;

FIG. 5 is a development view of a packaging bag material for producing the packaging bag of FIG. 1;

FIG. 6 is a longitudinal sectional view showing a state where an article access port of the packaging bag of FIG. 1 is opened.

FIG. 7 is a front view of the packaging bag according to the second embodiment of the present invention, showing a state where an article entrance is sealed.

FIG. 8 is a sectional view taken along line DD of FIG. 7;

FIG. 9 is a sectional view taken along line EE of FIG. 7;

FIG. 10 is a longitudinal sectional view showing a package manufactured using the packaging bag of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Packaging bag 12 Article insertion / exit port 13 Opening / closing part 14 Article storage part 15 Heat seal part 21 Plastic film 22 Magnet sheet 23 Adhesive 31 Raw material 32 Cutting piece 51 Packaging bag 52 Article insertion / exit 54 Article storage part 55 Heat seal part 56 Fold 61 Plastic film 71 Article 81 Packaged l Center line

Claims (5)

[Claims] 1. A packaging bag which forms an article opening / closing port by film-shaped opening / closing sections opposed to each other, and closes or opens the article opening / closing section by closely contacting or separating the opposing surfaces of these opening / closing sections. A resealable packaging bag wherein the opening and closing portions are brought into close contact with each other by magnetic force. 2. The resealable packaging bag according to claim 1, wherein both the opening and closing portions are made of a thermoplastic film mixed with a magnetic powder. 3. The article storage section is formed of a thermoplastic film mixed with magnet powder, and the thermoplastic films are closely adhered to each other in the article storage section. Resealable packaging bag. 4. The resealing property according to claim 1, wherein both of the opening and closing portions are formed by laminating a magnet sheet on a thermoplastic plastic film, and the magnet sheets are directly adhered to each other. Packaging bag. 5. The article storage portion is formed by bonding and laminating a magnet sheet to a thermoplastic plastic film, and the magnet sheets are directly adhered to each other in the article storage portion. A resealable packaging bag as described.