JPH05246445A - Easily openable taped sealing bag - Google Patents

Abstract

PURPOSE:To provide a sealing bag, which does not leak liquid, can be easily opened and can be re-sealed when necessary by using a tape with a heat sealable layer on one surface only, while being a taped bag. CONSTITUTION:Two rows of folded back surfaces 2 are formed by folding both ends of a film outside at a longitudinal fusion-bonded part 13 which exists on one surface of a bag 1, and a fusion-bonding tape 5 with a heat sealable layer on the inner surface, which covers a folding line 4 of the two rows of folded back surfaces 2, is fusion-bonded remaining tab pieces, which are not fusion-bonded, at both end edges. Or, the adhesive surface of an adhesive tape, at both ends of which an adhesive is not applied, is put to cover the folded back surfaces.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called pillow type hermetically sealed bag having a vertical fusion-bonded portion at the center of the bag and horizontal fusion-bonded portions at both ends orthogonal to the vertical fusion-bonded portion. The present invention relates to an easily openable tape-sealed bag in which a tape-bonded bag that uses a tape for vertical fusion to prevent the bag is made easier to manufacture and opened.

[0002]

2. Description of the Related Art Conventionally, as a sealed bag, one or two vertical fusion-bonded portions are provided, and then both ends are horizontally fused and used. In general, the smaller the number of fusion-bonded parts, the less the risk of bag breakage, and the better the appearance. A sealed bag called a three-way seal with one vertical fusion-bonded part is often used. Among the three-sided seals, one in which the vertical fusion-bonding part is provided in the center of the bag is called a pillow-type bag. As the vertical fusion-bonding method, the inner surface and the inner surface of the film are bonded together, and one end is Envelope sticking, which overlaps the other edge on top, was often used.

In the horizontal fusion-bonded bag, there is a so-called tunnel phenomenon in which a fluid component such as a liquid or a gas leaks from a gap between the fusion-bonded portions, which is a problem in sealing property. On the other hand, in the envelope sticking bag, both the inner surface and the outer surface of the film are fused, so that the heat-fusible layers must be provided on both sides of the film, and the film tends to be expensive. In addition, there is a problem in working that the film tends to adhere to the high temperature part of the machine.

The tape-attached bag is a vertical fusion-bonding portion, and both edges of the film are brought into contact with each other, and a tape having a heat-fusible layer on both surfaces is heat-fused from the back surface, and then both ends orthogonal to the vertical fusion-bonding portion are attached. It is a horizontally fused bag. The tape sandwiched between the horizontal fusion-bonding parts needs both vertical fusion bonding and horizontal fusion-bonding functions, so that it is necessary to provide heat-fusible layers on both sides.

In the tape-sealed bag, the stress of breaking the bag is not the force for directly peeling off the fusion-bonded portion like the joint-sealed bag, but the displacement stress between the tape and the film, so that the fusion-bonding force is not so large. It has the advantage that there is no fear of bag breakage.

[0006]

However, although there is a preferable bag which does not leak liquid as a tape-attached bag, it is difficult to open it. Further, a heat-fusible layer has to be provided on both sides as a tape, which is complicated. Therefore, there is a demand for a sealed bag that is a tape-sealable bag and that uses a tape having a heat-fusible layer only on one surface, has no liquid leakage, is easy to open, and can be resealed in some cases. It was

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems, and has a structure in which two ends of a film are folded outward by bending both ends of a film at a vertical fusion-bonding portion existing on one surface of a bag. A fusion tape that forms a surface and covers the fold lines of the fold faces of the two rows, and the inner surface of which is a heat-fusible layer is fused by leaving the unfused knob pieces at both edges. Alternatively, it is characterized in that the adhesive surface of the adhesive tape, which has an adhesive agent applied to the central portion and has no adhesive agent applied to both ends, is attached so as to cover the folded-back surface.

The material of the sealed bag in the present invention is made of various plastic films such as polypropylene, polyester, polyethylene, nylon and the like, or a laminated body of these materials or a laminated body of these materials and other materials and has a low melting point. And a heat-fusible layer such as a low-density polyethylene or an ethylene-vinyl acetate copolymer. Alternatively, if the base material is a heat-meltable film itself such as a polyethylene film or a polypropylene film, the heat-meltable layer is not particularly provided, and a single-layer film may be used.

The bag is of the so-called pillow type in which one vertical fusion line is provided in the center of one side of the bag, and even if the vertical fusion line is biased toward one end of the bag at the end. , If it does not match the crease line, it does not matter. A gusset-type bag having gusset folds at both ends can also be used. In this case, a large amount of contents can be filled, which is preferable.

Prior to bag-making, the hermetically sealed bag of the present invention is formed into a tubular shape by bringing both end edges in the length direction of the raw material film close to each other, and folding the both end edges outward to form a folded surface. Both ends of the folding surface are a folding line that is a fold line and a folding surface edge line that is a cutting line of the film, and the width of the folding surface is 15 mm to 3 mm.
0 mm is preferred.

It is preferable that the two folded lines are in contact with each other, but it is not always necessary that they are in contact with each other, and even if there is some gap, it does not matter. However, when an adhesive tape is used as the tape and a resealable sealed bag is manufactured, the presence of a gap is not preferable, and rather, the state where the folded lines are overlapped is preferable because the adhesive may not contact the contents. ..

As the fusion tape or the adhesive tape, a tape having a width narrower than the sum of the two folded surfaces is used. It suffices to provide the heat-fusible layer on one surface, that is, the inner surface in contact with the folded surface, but it may be provided on both surfaces.

When attaching the tape, the tape is attached so that the central portion of the tape width covers the folding line. Tape width is 2
Since it is smaller than the sum of the folded surfaces of the book, there are areas where the tape does not overlap at both ends. Insert a finger from this part to open the package. This portion may have a deviation for facilitating peeling of both films, and the deviation is 3 to 15 mm, preferably 5 to 10 mm.

When fusing the tape, the entire surface of the tape is heated without heating, and the both ends have a length of 3 to 15 mm, preferably 5 to 5.
Fuse with 10 mm left. Therefore, one of the fused parts is 3 to 15 mm, preferably 5 to 10 mm, and 6 to 30 m in total.
m, preferably 12 to 20 mm.

Since the remaining portion of the tape that is not fused is floating, a finger is inserted between the tape and the folded surface to form a knob piece that can be pinched. Therefore, when the knob piece is pinched and pulled, the tape is peeled off, and the central portion of the bag can be opened wide vertically. Therefore, it is preferable that the tab piece has a width that can be pinched by fingers, that is, 5 to 10 mm.

When an adhesive tape is used as the tape, the object of the present invention is achieved by not applying an adhesive to the tape portion corresponding to the knob piece. When the adhesive tape is used, since the adhesive is attached to the opened tape, it is possible to re-seal after opening and taking out a part of the contents.

The horizontal fusion bonding may be provided at the end portion of the bag which is orthogonal to the vertical fusion bonding portion, but the length between the horizontal fusion bonding portion and the cutting line of the film is 4-15 mm. It is preferable to fuse the inner side while leaving it.

When the tape is fused in this way, it is easy to pinch the knob piece on the outer side of the horizontal fusion-bonded portion. Since this portion is close to the end of the vertical fusion-bonded portion, the tape itself is a portion that easily peels off, The tape can be easily peeled off from the end portion, and the vertical fusion-bonding portion sequentially opens from one horizontal fusion-bonding portion toward the other horizontal fusion-bonding portion.

[0019]

In the sealed bag, the broken bag mainly starts from the vertical fusion-bonded portion. In the tape-sealed bag of the present invention, since the stress of the bag breaking acts as a displacement stress, it is noted that there is no risk of the bag breaking even if the vertical fusion bonding portion is stuck using a tape having a relatively small peel strength. And completed.

That is, the two end faces of the film in the lengthwise direction are folded back to provide two folding faces, and the tape is attached to cover the folding faces, whereby the tape is successfully provided outside the bag. .. As a result, the tape can be peeled off from the outside, and the central portion of the sealing bag can be opened in the vertical direction over the entire width of the horizontal fusion-bonded portion and the horizontal fusion-bonded portion. Furthermore, both ends in the length direction of the tape were left unadhered to facilitate opening.

[0021]

FIG. 1 is a plan view of a side of a sealed bag according to an embodiment of the present invention provided with a vertical fusion bonding portion, FIG. 2 is an end view taken along line ii-ii of FIG. 1, and FIG. It is a perspective view showing the state.

Reference numeral 1 is a hermetic bag, and 2 is a folding surface formed by folding both edge lines in the length direction of the film outward. The folded surface 2 has a folded line 3 at one end and a folded line 4 at the other end. The fold line 4 is exactly in contact with each other in FIG. 1 to form one line, but it may be slightly open in some cases. The width of the folded surface 2 was 20 mm, and the sum of both folded surfaces was 40 mm.

A fusion tape 5 is provided in the central portion on the two folding surfaces 2.
Fused. The width of the fusing tape 5 was 30 mm, and 16 mm in the central portion was heat-fused, leaving 7 mm on each edge. Reference numeral 13 is a fusion-bonded portion, and 6 is a knob piece left without being fused. The width between the tape edge line 9 and the folding surface edge line 3 is 5 mm in the present embodiment, but this is a gap provided so that the folding surface 2 and the tab piece 6 can be easily separated from each other. Because of the relationship
As long as it is a combination of film materials that can be easily separated without sticking, it does not matter even if the width of the tape or the edge line 9 of the tape exceeds the edge line 3 of the folded surface.

Reference numeral 7 is a horizontal fusion-bonded portion. In this embodiment, a non-fusion-bonded portion 8 of 8 mm is left between the film edge line and the horizontal fusion-bonded portion. The sealed bag of this example had a peel strength of 600 g to 1 kg, and could be easily opened without fear of breaking the bag. 10 is a heat-fusible layer, and 11 is a base material layer.

When opening, the peeling strength is comparatively small when the knob piece 6 on the outer side of the horizontal fusion bonding portion 7 is pinched and pulled. Therefore, as shown in FIG. 3, the fusion tape is peeled from the end portion by the force of the fingers. Then, the peeling propagated as it was to the other end of the sealed bag 1. In this way, the central part of the bag could be widely opened. Reference numeral 12 denotes the contents, and in FIG. 3, a bag accommodating the nut is shown.

In this embodiment, the sufficient non-fusing portion 8 is provided on the outer side of the horizontal fusion-bonding portion 7. However, if the non-fusing portion is too small to be pinched by fingers, or if there is no non-fusing portion, the horizontal fusion-bonding portion 8 is not present at all. The knob piece 6 between the fusion-bonding portion and the horizontal fusion-bonding portion was pinched and pulled, so that it was possible to open from any portion.

As another example, a tape-adhered film similar to that shown in FIGS. 1 and 2 was manufactured using an adhesive tape having an adhesive applied only to the central portion. In this case, the adhesive tape was attached so that the folded-back lines 4 were slightly overlapped. In this embodiment, not only the tape can be easily peeled off and opened, but also the already opened sealed bag can be resealed in a state where the contents remain, and it can be used as a dispensing bag.

[0028]

According to the present invention, it is possible to manufacture a sealed bag having a relatively small peel strength and no possibility of breaking, and it is possible to vertically open the central portion in the length direction of the sealed bag. Further, the functionality of the hermetically sealed bag is enhanced, and the hermetically sealed bag can be used as a bag for hermetically sealing various kinds of contents such as confectioneries, tray packages, tray substitute packs and the like.

Further, in the case of contents to be eaten by heating with a microwave oven, since it is possible to open and heat a part of the upper part, it has a wide application unlike other sealed bags.

[Brief description of drawings]

FIG. 1 is a plan view of a side of a sealed bag according to an embodiment of the present invention on which a vertical fusion bonding portion is provided.

FIG. 2 is an end view taken along the line ii-ii in FIG.

FIG. 3 is a perspective view showing a state during opening of the package.

[Explanation of symbols]

 1 Sealing Bag 2 Folded Surface 3 Folded Surface Edge Line 4 Folded Line 5 Fusing Tape 6 Knob Piece 7 Horizontal Fusing Part 8 Non-fusing Part 9 Tape Edge Line 10 Thermal Fusing Layer 11 Base Material Layer 12 Contents 13 Fusion part

Claims (4)

[Claims] 1. A hermetically sealed bag made of a film having a heat-fusible layer on the inside, wherein both ends of the film are bent outward in a vertical fusion-bonded portion existing on one surface of the bag. A fusion tape that forms a folded surface and covers the folded lines of the two rows of folded surfaces and has a heat-fusible layer on the inner surface is fused by leaving unfused knob pieces at both end edges. The easy-open tape-sealed bag is characterized in that the film ends that are orthogonal to the vertical fusion line are fused together. 2. A hermetically sealed bag made of a film having a heat-fusible layer inside, wherein both ends of the film are bent outward in a vertical fusion-bonding portion existing on one surface of the bag. A pressure-sensitive adhesive tape is formed that forms a folded surface, covers the folded lines of the two rows of folded surfaces, has an adhesive layer in the center of the inner surface, and does not have an adhesive layer on both inner edge line sides. With
An easy-open tape-sealing bag, wherein the film ends perpendicular to the vertical fusion line are fused together. 3. The easy-open-tape-sealed hermetic bag according to claim 1, wherein the edge line of the fusion tape is inside the edge line of the folded surface. 4. The non-fusing part is provided between the horizontal fusing part and the cutting line of the film. Sealing bag with unsealing tape.