JP2666019B2 - Easy-open tape-sealed bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a so-called pillow type sealed bag having a vertical fusion spliced portion at the center of the bag and a horizontal fusion spliced portion at both ends orthogonal to the vertical fusion spliced portion. The present invention relates to an easy-opening tape-attached sealed bag which makes a tape-attached bag using a tape for vertical fusion in order to prevent the bag easier to manufacture and easy to open.

[0002]

2. Description of the Related Art Conventionally, a sealed bag is provided with one or two lengthwise fusion parts, and then the both ends are horizontally fused. In general, the smaller the number of fused portions, the less the risk of rupture of the bag, the better the appearance, and a sealed bag with one vertical fused portion called a three-way seal is often used. Among the three-sided seals, the one provided with the vertical fusion part in the center of the bag is called a pillow-type bag. An envelope pasting the other edge on top has often been used.

[0003] The gasket-attached bag has a so-called tunnel phenomenon in which fluid components such as liquid and gas leak from gaps between the fusion parts in the horizontal fusion part, and there is a problem in hermeticity. On the other hand, in the envelope-attached bag, since both the inner surface and the outer surface of the film are fused, a heat-fusible layer must be provided on both surfaces of the film, and the film tends to be expensive. In addition, there is a problem in that the film tends to adhere to the high temperature part of the machine in the operation.

[0004] The tape-attached bag is formed by vertically fusing a tape having a heat-fusible layer on both sides from the back surface by bringing both ends of the film into contact as a vertical fusion-bonded portion, and then bonding both ends orthogonal to the vertical fusion-bonded portion. It is a bag with horizontal fusion. Since the tape sandwiched between the horizontal fusion parts needs both the functions of vertical fusion and horizontal fusion, it is necessary to provide heat-fusible layers on both sides.

[0005] In the case of a tape-attached bag, the stress of breaking the bag is not a force for directly peeling off the fused portion as in the case of a gas-sealed bag, but a displacement stress between the tape and the film. It has the advantage that there is no risk of bag breakage.

[0006]

However, although the tape-attached bag is a preferable bag without liquid leakage, it is difficult to open the bag. Furthermore, the heat-fusible layer must be provided on both sides as a tape, which is complicated. Therefore, there is a need for a sealed bag that uses a tape having a heat-fusible layer on only one surface, which is a tape-attached bag, has no liquid leakage, is easy to open, and can be resealed in some cases. Was.

[0007]

An object of the present invention is to solve the above-mentioned problems, and the structure of the bag is such that the inside is formed of a film which is a heat-fusible layer, and the bag has a vertical fused portion on one surface. A bag, wherein both ends of the film are bent outward to form two rows of folded surfaces, and a fusion tape having a heat-fusible layer on the inner surface covering the two rows of folded surfaces is fused, Both ends orthogonal to the vertical fusion bonding portion of the film are horizontal-fused, and the length pinched by a finger between the horizontal fusion bonding portion and the horizontal cutting line of the film, preferably a non-fusing portion of 4 to 15 mm And the unsealed portion at the longitudinal end of the tape can be pulled open.

[0008] The material of the sealed bag in the present invention is a plastic film such as polypropylene, polyester, polyethylene, nylon or the like, a laminate of these or a base film composed of a laminate of these and other materials, having a low melting point. And a heat-fusible layer such as low-density polyethylene or ethylene-vinyl acetate copolymer having Alternatively, if the substrate is a heat-sealing film itself such as a polyethylene film or a polypropylene film, a heat-sealing layer is not particularly provided, and a single-layer film may be used.

The form of the bag is a so-called pillow type in which one vertical fusion line is provided at the center of one surface of the bag, and even if the vertical fusion line is biased toward the end on one surface of the bag. If it does not match the fold line, it does not matter. Gusset-type bags having gusset folds at both ends can also be used. In this case, a large amount of contents can be filled, which is preferable. The vertical fusion part in the present invention is a fusion part provided in the length direction of the film forming the bag, and the horizontal fusion part is a fusion part provided in the transverse direction of the film forming the bag. Yes, independent of the finished bag length ratio.

Prior to bag making, the sealed bag of the present invention is formed by making both ends in the longitudinal direction of the raw material film close to each other to form a tube, and turning both ends outward to form a folded surface. Both ends of the folded surface are a folded line that is a fold line and a folded surface edge line that is a cutting line of the film, and the width of the folded surface is 15 mm or more.
30 mm is preferred. The two folded lines are preferably in contact with each other, but need not necessarily be in contact with each other, and there may be some gaps. However, when an adhesive tape is used as a tape and a resealable sealed bag is manufactured, the presence of a gap is not preferable. .

As the fusing tape or the adhesive tape, a tape narrower than the sum of the two folded surfaces is used. It is sufficient if the heat-fusible layer is provided on one surface, that is, on the inner surface in contact with the folded surface, but may be provided on both surfaces. When attaching the tape, the tape is attached such that the center of the tape width covers the folding line.

In the horizontal fusion bonding, a length pinched by a finger between the horizontal fusion bonding portion and the cutting line of the film, that is, 4 mm
It is preferable to fuse the inner side while leaving 〜15 mm, preferably 8〜15 mm. With this fusion, it is easy to pinch the non-fusion part of the tape outside the horizontal fusion part,
The tape can be easily peeled off from the end, and this peeling can be easily propagated, and as shown in FIG. 3, the vertical fusion spliced portion moves from one horizontal fusion portion to the other horizontal fusion portion at once. I will open it.

[0013]

In a sealed bag, the breaking of the bag starts mainly from the vertical fused portion. In the tape-attached sealed bag of the present invention, since the stress of the bag break acts as a displacement stress, attention is paid to the fact that there is no risk of the bag being broken even if the vertical fusion-bonded portion is stuck using a tape having a relatively small peel strength. It was completed.

That is, by folding both ends of the film in the vertical direction outward to provide two folded surfaces, and covering the folded surfaces with a tape, the tape was successfully provided outside the bag. . Further, in order to facilitate opening, both ends in the length direction of the tape were left unattached. As a result, it is possible to peel off the tape from the outer longitudinal end, and it is possible to open one side of the sealed bag, particularly the central portion, in the vertical direction over the entire width of the horizontal fusion portion and the horizontal fusion portion. it can.

[0015]

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 of FIG. 1, and FIG. It is a perspective view which shows the state of.

Reference numeral 1 denotes a sealed bag, and reference numeral 2 denotes a folded surface formed by folding both edge lines in the longitudinal direction of the film outward. The folded surface 2 has a folded surface edge line 3 at one end and a folded line 4 at the other end.
It is. The folded line 4 is exactly in contact with
The lines are formed, but may be slightly open in some cases. The width of the folded surface 2 was 20 mm, and the sum of the two folded surfaces was 40 mm.

At the center on both folded surfaces 2, a fusion tape 5
Was fused. The width of the fusion tape 5 was 30 mm, and 16 mm at the center portion was thermally fused while leaving 7 mm at each end edge.
Reference numeral 13 denotes a fused portion, and reference numeral 6 denotes a floating portion left without being fused. Reference numeral 7 denotes a horizontal fusion-bonded portion. In this embodiment, a non-fusion 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. Reference numeral 10 denotes a heat-fusible layer, and 11 denotes a base material layer.

At the time of opening the tape, the end portion in the length direction of the tape which has not been fused at the non-fused portion 8 outside the horizontal fused portion 7 is pinched and pulled, so that the peel strength is relatively small. As shown in FIG. 3, the fusion tape was peeled off from the end in the length direction by the force of the fingers, and the peeling propagated as it was to the other horizontal fusion bonding portion 7 of the sealed bag 1. In this way, the central portion of the bag could be opened widely. Numeral 12 denotes the contents, and FIG. 3 shows a bag containing a room.

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

[0020]

According to the present invention, it is possible to manufacture a sealed bag having a relatively small peel strength and no risk of breakage, and it is possible to vertically open the longitudinal center of the sealed bag. The functionality of the sealed bag is enhanced, and it can be used as a bag for sealing confectionery, tray packaged goods, tray substitute packs, and other various contents. Further, in the case of contents that are heated and eaten by a microwave oven, since the upper part can be opened and heated, it has a wide application unlike other sealed bags.

[Brief description of the 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 line II-II of FIG.

FIG. 3 is a perspective view showing a state during opening.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sealing bag 2 Folded surface 3 Folded surface edge line 4 Folded line 5 Fusion tape 6 Floating part 7 Horizontal fusion part 8 Non-fusion part 9 Tape edge line 10 Heat fusion layer 11 Base material layer 12 Contents 13 Fusion part

Claims (3)

(57) [Claims] 1. A sealed bag comprising a film having a heat-fusible layer on the inner side and a vertical fused portion on one side of the bag, wherein both ends of the film are bent outward to form two rows. A fusing tape that forms a folded surface, covers the two rows of folded surfaces, and has a heat-fusible layer on the inner surface is fused, and both ends of the film that are perpendicular to the vertical fused portion are horizontally fused. In addition, a non-fused portion of a length pinched by a finger is left between the horizontal fused portion and the horizontal cutting line of the film, and the non-fused portion at the longitudinal end of the tape can be pulled open. Sealable bag with easy-open tape. 2. The sealed bag according to claim 1, wherein the length to be pinched by a finger is 4 to 15 mm. 3. The sealed bag according to claim 1, wherein the length to be pinched by a finger is 8 to 15 mm.