JPH08230943A - Auxiliary tape for unsealing bag, and package bag - Google Patents

Abstract

PURPOSE: To easily and certainly execute tearing-up for unsealing a package bag without providing a incised line at the bag material itself by providing an auxiliary tape for unsealing the bag. CONSTITUTION: An incised line 2 for severance is formed in the longitudinal direction on a tape 1 made up with synthetic resin film serving as its base. The incised line 2 is formed in deformed perforations where a number of incisions 21 are provided intermittently in a shape of two-dimensional extent wherein the tearing direction starting from the end of one incision can be compensated by the next incision 21. An auxiliary tape formed in the way as mentioned above for unsealing a bag is stuck to a specified unsealing position on a package bag.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention easily and envisions the opening of a packaging bag in the form of liquid foods such as instant foods, foods such as powdered granules, various chemicals, and bag-like products such as envelopes. The present invention relates to a bag opening auxiliary tape for surely opening along a line and a packaging bag using this tape.

[0002]

2. Description of the Related Art Generally, a bag body is made of a composite material having a synthetic resin film as a base material, mainly as a sealed packaging bag for various foods such as fluid or powder, various chemicals and the like. There is. As this composite material, a stretched film such as nylon or polyester is used as a base material, and other stretched films, aluminum foil, paper and a sealant layer are laminated on the base material.

In this type of packaging bag, it is possible to easily open the bag without using scissors or a knife in the opening operation, and the tearing direction at the opening site is stable, so that the contents can be opened along the assumed line. It is desirable to be able to easily open the container in an open state that is easy to take out without spilling.

However, in the case of the composite material as described above, the tearing direction at the time of opening is apt to be distorted due to the relation of the molecular arrangement direction of the stretched film as the base material, and the tearing direction due to the tearing largely deviates, If the film cannot be opened along the assumed line and the directionality of the film is different between the front and back of the bag, the tearing directions of the front and back may largely deviate from each other depending on the direction of the opening operation. Further, even in a structure such as a paper / aluminum foil / sealant layer which does not use a stretched film, it is difficult to unseal along the assumed line.

In order to easily open the bag, it is preferable to provide a cut line in the opening portion of the film which is the base material of the composite material, but the cut line is provided in the composite material film forming the bag. Causes the material itself to be damaged by the cuts, increasing the risk of impairing the barrier property due to pinholes and the like. In addition, since the bag material itself needs a process such as making a score line, the bag manufacturing process becomes complicated and the cost becomes high.

Moreover, in the case of a simple perforation line having a normal straight cut line, breakage from the cut edge sometimes deviates from the cut line.

The present invention has been made in view of the above, and an auxiliary bag opening tape for making tearing and opening operation easily and surely without making a score line on the bag material itself, and A packaging bag using the auxiliary tape is provided.

[0008]

An auxiliary tape for opening a bag according to the invention of claim 1 for solving the above-mentioned problems is a tape having a synthetic resin film as a base material, and a score line for separating in a longitudinal direction. This cut line is formed so that many cut lines are interrupted in a shape with a two-dimensional spread that can correct it in the tearing direction from one cut edge at the time of cutting and the next cut line. It is characterized by having a modified perforation.

The bag opening auxiliary tape according to a second aspect of the present invention is a tape having a synthetic resin film as a base material, which is formed on both sides of the tape along the cutting line assumed in the longitudinal direction, in the tearing direction at the time of cutting. It is characterized in that it is provided with two separation guides that regulate and guide it.

A packaging bag according to a third aspect of the present invention is characterized in that any one of the bag opening auxiliary tapes is attached to an opening portion set in the packaging bag.

[0011]

According to the bag opening auxiliary tape of the first aspect of the present invention, for example, this is attached to the opening portion of the packaging bag in the bag making step or after the bag making. Then, when opening the packaging bag, if you tear at the deformed perforation line in the longitudinal direction of the tape, the tape is easily torn at the deformed perforation line. And the packaging bag is also torn along the score line.

In particular, since the deformation is due to a perforation line which is deformed by a cut having a two-dimensional spread, the distortion in the direction of tearing from one cut end is corrected at the next cut to generate it. It is possible to surely tear and open along the line of the planned opening site without failure.

Further, in the case of the bag opening auxiliary tape of the invention of claim 2, it is attached to the opening portion of the packaging bag in the same manner as described above, and when opened, it is torn between the two separation guides of the tape. By doing so, the tearing in the tearing direction is regulated by the separation guide, and the tearing and unsealing can be surely performed along the intended line without causing further tearing.

In addition, in the packaging bag to which the above-mentioned bag opening auxiliary tape is adhered, the bag itself can be easily torn and opened at the opening portion set as described above, but the bag itself is subjected to large processing. It does not need to be added, and the bag manufacturing process is not complicated, and the bag can be easily manufactured. In addition, since the bag material itself is not scratched just by attaching the tape, there is no fear of deterioration of the barrier property due to pinholes or the like.

[0015]

Embodiments of the present invention will now be described with reference to the drawings.

1 to 10 show an embodiment of a bag opening auxiliary tape (1) of the first invention, which is based on a stretched film of polyester resin such as polyethylene terephthalate or other synthetic resin film as a base material. In addition, a deformed perforation line (2) for cutting is formed along a substantially straight virtual cutting line in the tape longitudinal direction at a substantially central portion in the width direction. It can be wound as shown in FIG. 1 before handling by sticking to a packaging bag and using.

The above-mentioned auxiliary tape (1) is made of only the above-mentioned base film, or a composite material in which a hot-melt adhesive layer (12) such as polyethylene resin or another film layer or paper is laminated. May be more. In the case of the latter tape, the cut line (2) may be formed only in the base film layer (11), but it is better to form the cut line in all the layers such as other film layers and paper. Is easy and preferable.

The cut line (2) for separation is formed in a deformed perforation shape as shown in order to allow tearing when opening the bag without distortion.

This modified perforation-shaped cut line (2) has a large number of cut lines (21) so that it can be corrected by the next cut line (21) in the tearing direction from one cut end at the time of cutting. It is formed so that it has a dimensional spread and is intermittent.

For example, in the embodiment shown in FIG. 1 and FIG. 3 which is an enlarged view thereof, the cut (21) having a substantially Y-shape which is expanded in a bifurcated shape in the longitudinal direction of the tape corresponds to the lower portion of the Y-shape. The cut portions (21a) are formed in a discontinuous manner at required intervals so as to be aligned in a substantially straight line. (21b) shows a bifurcated part.

In the case of this embodiment, when tearing from the bifurcated side of the cut (21) toward the bottom of the Y-shape, the cut end corresponding to the Y-shaped lower end of one cut (21). Even if the part of the tear (a) from (21c) is distorted in an oblique direction, the bifurcated part (21b) of the next cut (21) waits with the spread of the required angle, and the distorted break (a) becomes the next cut. The part (21) can be surely reached, whereby it is possible to successively tear through the cuts (21) along the planned cutting line without causing it.

The substantially Y-shaped cut (21) is as follows.
As shown in FIG. 4, the bifurcated portion may be curved in a substantially semicircular shape or an arc shape.

As the modified perforation line (2),
In addition to the above, as shown in FIG. 5, in the tape longitudinal direction,
Substantially linear cuts (22) inclined in alternate directions are alternately formed, or as shown in FIG. 6, two cuts (23) inclined so as to form a substantially C shape are intermittently formed in pairs. Can be formed as. Even in these cases, tearing from the open side of the sloping cuts (22) (23)
Even if the direction of the break (a) from the cut end of each cut is slightly different, the break (a) is waiting because the next cut is waiting in the direction intersecting the extension of the cut (22) (23). ) Can reliably reach the next incision and can be torn along a given line without causing any more.

Further, as the modified perforated cut lines (2), substantially arc-shaped cuts (24) are formed on both sides of the arc-shaped inside with a virtual cut line in the tape longitudinal direction as shown in FIG. The cut edges are formed so as to face each other so as to face each other so as to form two rows of discontinuous rows, or as shown in FIG. 8, the cuts (24) of both rows facing each other are respectively cut into two rows of the other row. They can be crotch-shaped and formed in alternate rows. In the case of these embodiments, even if the direction of the tear (a) from the cut edge is slightly deviated, the cut (14) in the other row can be reliably reached, and the tear can be performed while preventing it.

Instead of the above-mentioned arc shape, FIG. 9 and FIG.
As described above, the cuts (25) bent in a substantially V shape may be formed in the same row as described above, and in this case also, the same operation as described above is achieved.

The cut line (2) in each of the above-mentioned embodiments is usually designed so that the length dimension (L) in the tearing direction and the width dimension (W) are in the range of 0.5 to 3 mm.
The interval (S) between the cuts is also preferably 0.5 to 3 mm. In any case, it is desirable in practice to set the angle range in which it can be prevented to be 90 ° or more.

11 to 13 show an embodiment of the bag opening auxiliary tape (1) of the second invention. This auxiliary tape (1) is a tape having a synthetic resin film as a base material similar to the above, and has two substantially parallel strips on both sides thereof along an imaginary cut line in the tape longitudinal direction. The separation guides (3) and (3) are formed of yarns, ridges, etc., and it is possible to regulate and guide the tearing caused by the tear between the separation guides (3) and (3). ing.

When a thread such as a monofilament thread or a multifilament thread made of a synthetic resin having a relatively high tension is used as the separation guide (3), the thread (31) is used as shown in FIG. 12 (A). Is attached to a tape main body (1a) having a synthetic resin film as a base material by adhesion or fusion bonding means. When the separating guide (3) is formed by the convex strip (32), it is formed integrally with the tape main body (1a) by means such as extrusion as shown in FIG. 12 (B).

The cross-sectional shape of the two separation guides (3) and (3), the thickness and height of the separation guides, the distance between the two separation lines, and the like have a restricting action in the tearing direction as a separation guide against tearing action. It can be appropriately determined in consideration.

In the case of the auxiliary tape (1) of this embodiment, when the tape is torn in the longitudinal direction, the breaking direction can be restricted by the two separating guides (3) (3). , It will be possible to tear in a substantially straight line along the assumed cutting line.

In particular, as shown in FIG. 13, if a perforation-like cut line (33) is provided along the separation line between the two separation guides (3) and (3), further tear separation will occur. The operation is easy and can be performed without distortion, which is more preferable.

The bag opening auxiliary tape (1) of the first invention and the second invention described above is attached to the opening portion set in various packaging bags (5) by a joining means such as adhesion or fusion. To do. This constitutes the packaging bag of the third invention.

In the embodiment of FIG. 14, the bag opening auxiliary tape (1) of the first invention having the modified perforation-shaped cut line (2) is provided on the surface of the packaging bag (5) at corresponding positions on the front and back sides of the bag. It shows the case where it is attached to. Packaging bag of this embodiment (5)
Is a bag provided with a re-sealing chuck (51) having a concave line and a convex line that are fitted to each other, and an auxiliary tape (1) is attached to an opening portion slightly above the chuck (51). (52)
Indicates a fused portion.

The embodiment of FIG. 15 shows a case where a packaging bag (5) having a different bag form from that described above is pasted with an auxiliary tape (1) similar to the above at the opening portion of the bag.

Further, the embodiment of FIGS. 16 and 17 is
It shows a case where the auxiliary bag-opening tape (1) of the second invention, which is provided with the two-piece separation guide (3), is attached to the surfaces of the packaging bag (5) at the corresponding positions on the front and back of the bag. In this case, it is desirable to form a notch (53) at the opening start position as shown in the figure.

The form of the packaging bag (5) is not limited to that of the illustrated embodiment, and various forms such as a pillow bag and a bag having a gusset-like fold can be used in the same manner as described above.
The bag material may be a bag made of a single material of synthetic resin film or a bag made of a composite material in which another resin film, aluminum foil, paper or the like is appropriately laminated on the synthetic resin film. Good.

As a mounting means for the bag opening auxiliary tape (1), when the surface of the packaging bag to be mounted on the auxiliary tape side is paper, the paper is laminated on the base film layer (11) of the tape. Glue or glue, or an adhesive layer (1) made of hot-melt or polyethylene resin.
It is advisable to attach it by means of thermocompression according to 2). Also,
When the surface of the packaging bag is made of a synthetic resin film, it is desirable that the packaging bag be attached by an adhesive means. This auxiliary tape (1) can be attached either during the bag-making process or after the bag-making process, and in any case, a large amount of processing such as when making a score line in the bag material is required. It can be easily manufactured without applying. It can also be carried out by mounting it on the inner surface of the packaging bag (5).

When the packaging bag (5) is opened, for example, when the bag opening auxiliary tape (1) attached thereto has a modified perforated cut line (2), this cut line ( 2) acts as a tear aid, and the packaging bag (5) is easily torn along the score line (2) following this. In particular, since it is due to the deformed perforated cut line having a two-dimensional spread, the distortion in the direction of tearing from one cut edge is corrected at the next cut and there is no failure such as causing it It is possible to surely tear and open along the line of the part.

Further, in the case of the bag opening auxiliary tape (1) having the two-piece separation guides (3) and (3), if tearing is performed between the two-piece separation guides (3) and (3), The tearing in the tearing direction can be regulated by a cutting guide such as a thread, and the tearing and unsealing can be surely performed along a predetermined line without causing further tearing.

Furthermore, since it is not necessary to scratch the bag material, the barrier property is not impaired and the protective effect of the contents is not impaired.

[0041]

As described above, according to the bag opening auxiliary tape of the first aspect of the present invention, by mounting the auxiliary tape on the opening portion of the packaging bag, the deformed perforation line of the tape is provided. If it is torn at the point of, it is possible to tear while compensating for it in the direction of tearing by the notch line sequentially by each notch, and tear easily and surely along the assumed opening line in a substantially straight line. You can

Further, in the case of the bag opening auxiliary tape according to the invention of claim 2, it is attached to the packaging bag in the same manner as described above and is torn between the two separating guides, so that the tearing is caused. Since it can be regulated in the direction, it is possible to easily and surely tear and open along a predetermined line between the separation guides in a substantially straight line shape.

Moreover, by using the auxiliary tape for opening the bag, the bag itself can be easily torn and opened at the opening portion set as described above, but the bag itself is greatly processed. It is not necessary and does not complicate the bag making process, and can be easily manufactured. In addition, since the bag material itself is not scratched just by attaching the tape, there is no fear of deterioration of the barrier property due to pinholes or the like. Especially, since the auxiliary tape is attached only to a part of the packaging bag, the appearance of the packaging bag is not much different from the original bag, and even if the surface is made of paper, the wind of the paper There is no possibility of spoiling the situation.

[Brief description of drawings]

FIG. 1 is a perspective view of a bag opening auxiliary tape of the present invention.

FIG. 2 is an enlarged sectional view of the above.

FIG. 3 is an enlarged plan view of a cut line portion of the above.

FIG. 4 is a partially enlarged plan view showing an example of changing the cut line in the previous figure.

FIG. 5 is a partially enlarged plan view illustrating another example of a score line.

FIG. 6 is a partially enlarged plan view illustrating another example of a cut line.

FIG. 7 is a partially enlarged plan view illustrating another example of a score line.

FIG. 8 is a partially enlarged plan view illustrating another example of a cut line.

9 is a partially enlarged plan view showing a modified example of the cut line in FIG.

FIG. 10 is a partially enlarged plan view showing a modified example of the cut line in FIG.

FIG. 11 is a perspective view showing an embodiment of another bag opening auxiliary tape of the present invention.

FIG. 12 is an enlarged sectional view of the above. .

FIG. 13 is a partial perspective view showing a modified example of the same tape.

FIG. 14 is a front view showing an embodiment of a packaging bag to which the first bag opening auxiliary tape of the present invention is attached.

FIG. 15 is a front view showing another embodiment of the packaging bag to which the first auxiliary bag opening tape of the present invention is attached.

FIG. 16 is a front view showing an embodiment of a packaging bag to which a second bag opening auxiliary tape of the present invention is attached.

FIG. 17 is a partial sectional view of the above.

[Explanation of symbols]

 (1) Auxiliary tape for opening the bag (2) Deformation perforated cut line (3) Cutting guide (5) Packaging bag (a) Tear

Claims (3)

[Claims] 1. A tape using a synthetic resin film as a base material, wherein a scoring line for cutting is formed in the longitudinal direction of the tape, and the scoring line is a breaking direction from one kerf end at the time of cutting. An auxiliary tape for opening a bag, characterized in that it has a deformed perforation formed so that a large number of cuts are interrupted in a shape having a two-dimensional expansion that can be corrected at the next cut. 2. A tape made of a synthetic resin film as a base material, comprising two strips on both sides of a cut line assumed in the longitudinal direction of the tape and for regulating and guiding it in a tearing direction at the time of cutting. A tape for opening a bag, characterized by being provided with a separation guide. 3. A packaging bag comprising the bag opening auxiliary tape according to claim 1 or 2 attached to an opening portion set in the packaging bag.