JPH08217094A - Easily unsealable packaging bag - Google Patents

Abstract

PURPOSE: To easily take out even a cubic material, by providing a zipper-form cut line from the upper end to the lower end of both front and rear faces of a packaging bag. CONSTITUTION: An easily unsealing packaging bag 10 is provided with a zipper- form cut line 15 extending from the upper end to the lower end, parallelly to the side end 10a of the packaging bag at the outer side than the center line (s) of bag. when unsealing the bag, the contents contained in the bag are pushed down from the front and rear sides thereof and the upper end of the cut line is held by hands to peel off it, the tensile force to the side end direction acts on the diagonally bent and notched (e) front end through the linear notch (t) and hence, the bag is cut from the front end of the cut to the continual linear notch (t) right thereunder. And the bag is peeled off downwardly by turns. Accordingly, even when the cut line has reached to contents, the line is not diagonally bend on the way and hence, the bag can be vertically opened large.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for storing toiletry products such as chemical wipes and wet tissues, and is particularly suitable for removing contents from a packaging bag containing large contents. It concerns packaging bags.

[0002]

2. Description of the Related Art Conventionally, for example, polyethylene terephthalate (PET) / aluminum (A
l) / Toilet products such as folded chemical wipes and wet tissues are stored using a laminated material in which unstretched polypropylene (CPP) is laminated, and the top and bottom and the central part are sealed on three sides by heat sealing. Known packaging bags. In these packaging bags, the upper seal part is cut (for example, V is used as a trigger of the slit).
Some of them have notches and the like), and are torn open linearly downward (to tear the cut end of the upper seal part back and forth) to open.

[0003]

By the way, as shown in FIG. 7, when the contents are stored in a large three-dimensional manner, when the tearing portion reaches the contents, the tearing force directed downward is generated. It was obstructed by an object and was bent and torn by an outward pulling force in the middle, so that only a small opening was formed and the contents could not be taken out. In addition, the same phenomenon occurs even if you try to tear it left and right. Therefore, in view of the above problems, the present invention provides a large opening even for a packaging bag in which a three-dimensional content is stored, and thus, an easy-to-open packaging bag in which the content can be easily taken out. For the purpose of provision.

[0004]

To achieve the above object, the present invention relates to a packaging bag made of a laminated material having a plastic film as a main component, and a zipper is provided on both front and back surfaces of the packaging bag from the upper edge toward the lower edge. Shape break line (1
5, 15a) are provided, and the package is opened along the cut line.

Further, the zipper-shaped cut line (1
5, 15a) are provided substantially parallel to the side end (10a) of the packaging bag and outside the center line (s) of the packaging bag.

The zipper-shaped cut line (1
5, 15a) is an individual shape in which the lower end of the linear cut (t) is bent at a predetermined angle (α) toward the center (s) of the bag, and the cut (p) is linearly formed at a constant pitch. It is characterized by being provided intermittently.

Further, the zipper-shaped cut line (1
5, 15a) is provided in at least one layer of the laminated material.

[0008]

The packaging bag (10) of the present invention which is easy to open is shown in FIG.
As shown in (a), zipper-shaped cuts on both front and back sides from the top edge to the bottom edge, parallel to the side edge (10a) of the packaging bag and outside the center line (s) of the bag. Lines (15, 15a) are provided. This opening holds the stored contents from the front and back of the bag, holds the upper edge of the cut line, and crotches (pulls in the left and right direction around the cut line. Then, the pulling force in the side end direction acts on the tip of the oblique notch (e) bent through the linear notch (t), and this pulling force causes the tip of this notch to move. It is cut toward the intermittent linear cut (t) immediately below and is torn one after the other (see FIG. 3). Therefore, even if the cut line reaches the contents, it is possible to open the package largely in the vertical direction without bending in the middle.

[0009]

The present invention will be described in detail with reference to the following examples.
As shown in FIG. 1 (a), the packaging bag of the present invention is obtained by heat-sealing a laminated material mainly composed of a plastic film to form a packaging bag. Towards the zipper-shaped cut line (15,1
5a), the cut line is formed outside the center line (s) of the bag and parallel to the side edge (10a) of the packaging bag. Also, this zipper-shaped cut line is
The lower ends of the linear cuts (t) are bent at a predetermined angle (α) to form individual cuts (p), and the cuts (p) are vertically intermittently provided at a constant pitch and along the cut line. You can easily open it by pulling it to the left and right and tearing your crotch.

As shown in FIG. 1 (b), the packaging material in this embodiment is PET (11) (12μ) in order from the surface layer.
/ PE (12) (15μ) / Al (13) (7μ) / P
It is composed of E (14) (30μ). Zipper-shaped cut lines (15, 15) formed on this packaging material
The a) can be formed in advance on the PET film (11) which is a surface layer of a laminated material, for example. In this way, the PET film (11) on which the score line is formed in advance is
In the case of laminating the 1-layer (13), the adhesive may stick out from the cut line due to dry lamination, so in the present embodiment, it is laminated by sand lamination using PE. The PE layer (14) was directly formed on the surface of the Al layer (13) by extruder lamination. Instead of PE (14), CPP
Other heat-sealable resins such as
It is preferable to use PE which is easy to tear.

As shown in FIG. 2 (a), the zipper-shaped cut line provided on the front side of the packaging bag bends the lower end of the linear cut (t) in the vertical direction at an angle (α) of 45 ° left. A diagonal cut (e) is provided to form one cut (p). The cuts are intermittently arranged in a straight line from the upper edge to the lower edge to form a cut line (15). It was done. The length (f) of this linear cut (t) is 6 mm, the length of the diagonal cut (e) is 3 mm, and each cut is 9 mm. Furthermore, the distance between the unprocessed part (h) between the tip of the diagonal cut (e) and the upper end of the linear cut (t) is 2 m.
When the distance between the unprocessed portions (h) is 3 mm or more, the breakability is deteriorated, and it becomes impossible to tear along the cut line (15). 2 (b)
Is a zipper-shaped cut line (15
In the case of a), a zipper blade having a shape in which the cut line on the front surface side is turned upside down is used for processing. By folding this packaging material to make a bag, the cut line has the same shape on the front and back sides.

This zipper-shaped cut line (15, 15
a) is to be formed only on the PET layer (11) which is the surface layer of the packaging bag so that, for example, a chemical rag containing a silicone resin, or a toilet tissue product such as a wet tissue impregnated with a weak alcohol liquid can be stored. A packaging bag having the necessary barrier properties can be obtained. In addition, it is possible to provide a break line penetrating all the layers in a packaging bag for storing contents that do not require barrier properties.

<First Embodiment> A first embodiment will be described with reference to FIG. Urethane-based ink (LP Super, manufactured by Toyo Ink Mfg. Co., Ltd.) on one side of a PET film with a thickness of 12 μm
A pattern layer is provided by printing using a zipper-shaped blade from the opposite side of the pattern layer, and a cut line (1
5, 15a) are formed. This zipper-shaped cut line is located at the lower left of the linear cut (t) in the vertical direction.
A single notch (p) is provided by providing an oblique notch (e) bent at an angle (α) of °, and the length (f) of this linear notch (t) is 6 mm. The length of the cut (e) is 3 mm, and the individual cut pitch (g)
Is 9 mm. Furthermore, the distance between the unprocessed portion (h) between the tip of the diagonal cut (e) and the upper end of the linear cut (t) is 2 mm. In addition, the position (j) where the cut line is formed is the PET film (1
A cut line (15) on the surface side is formed in the vertical direction of 30 mm inside from the left end of 1), and the back surface is parallel to the cut line on the front surface side at a position (k) 102 mm inside the cut line (15). A side break line (15a) is formed. afterwards,
On the pattern layer side of the PET film, Al (7 μm) is laminated by a sand lamination method using PE (15 μm), and PE (30 μm) is further provided on Al by extruder lamination to obtain a laminated material. afterwards,
After slitting the entire width (n) to 300 mm to form a packaging material, it was put into a bag making machine and heat-sealed to form a gusset bag (see FIG. 4 (b)).

A chemical rag is stored in this gusset bag, and the upper opening is sealed by heat sealing to suppress the chemical rag from the front and back of the bag so that the bag is cleaved from the cut line of the upper heat seal. When it was pulled to the left and right, it could be torn straight up and down along the zipper-shaped cut line, and a large opening was possible.

Comparative Example 1 Comparative example 1 will be described with reference to FIG. A 12 μm-thick PET film (11) is provided with a pattern layer on one side, and a straight perforation line (30) is formed from the opposite side of this pattern layer (the perforation line on the back side of the packaging bag is not shown). . The length (f) of the cut (t) on the straight line of the perforation line is 5 mm, and the unprocessed portion (h) between the cuts is 2 mm, and is linearly formed from the upper end edge to the lower end edge. did. This laminated material is formed into a gusset bag in the same manner as in Example 1.

In the same manner as in Example 1, after storing the chemical rag and heat-sealing the upper part, an attempt was made to open it by crotch tearing.
It was impossible to open the packaging bag downward because it was torn diagonally to the right from the lower end of the perforation line (30).

Comparative Example 2 Comparative example 2 will be described with reference to FIG. Angle 12 on PET film (11) with a thickness of 12μ
Form a perforation line (40) that is obliquely inclined at 5 °.
The length (f) of the notch (t) of this perforation line is 6 mm
Then, the angle (α) was inclined at 45 degrees, and the unprocessed portion (h) between the cuts was 2 mm, and was formed linearly from the upper end edge to the lower end edge. Others were processed in the same manner as in Example 1, but as shown in FIG. 6, "slack" was generated below the inclined perforation line (40), and the laminating process could not be performed.

It is apparent that the present invention can be applied to well-known bags such as a three-sided seal bag and a pillow packaging bag other than the gusset bag as in the embodiment. Further, the configuration of the packaging material is not limited to the embodiment and may be arbitrary.

[0019]

Since the present invention has the above-mentioned constitution, it has the following effects. That is, the packaging bag with the zipper-shaped cut line is formed so that even if the contents are large three-dimensional objects with a wide width such as a chemical rag, they are cleaved to separate the packaging bag from the outside along the cut line. It does not bend in any direction, but is cut straight up and down in a straight line and can be opened to a large extent, allowing the contents to be taken out easily.
Then, the break line, the straight cut the lower end of each shape bent at a predetermined angle in the direction of the center of the bag, by intermittently providing at a constant pitch, when the bag is cleaved,
The pulling force in the direction of the side edge of the bag acts on the tip of the diagonal cut that is bent via the linear cut, and this pulling force moves from the tip of this cut to the intermittent linear cut immediately below. Is cut off and torn one after another downward. Therefore, even if the cut line reaches the contents, it is possible to open the package largely in the vertical direction without bending in the middle. Also, the break line,
By providing it on at least one layer of the laminated material of the bag, for example, a packaging having a barrier property necessary for storing a toilet cloth product such as a chemical rag containing a silicone resin or a wet tissue impregnated with a weak alcohol liquid. Various excellent effects such as a bag can be obtained.

[Brief description of drawings]

1A and 1B show an embodiment of a packaging bag according to the present invention that is easy to open, in which FIG. 1A is a plan view and FIG. 1B is A- in FIG. 1A.
FIG.

FIG. 2 shows an example of a zipper-shaped cut line in a packaging bag that is easy to open according to the present invention, where (a) is a zipper-shaped cut line on the front surface side of the bag, and (b) is a cut line on the back surface side. It is explanatory drawing which shows a line.

FIG. 3 is an explanatory view showing a tearing state by crotch tearing by a zipper-shaped cut line of the present invention.

4A and 4B show a laminated material used for a packaging bag of the present invention which is easy to open, wherein FIG. 4A is a plan view in which front and back cut lines are formed, and FIG. 4B is a gusset made from the laminated material. It is a perspective view of a bag.

FIG. 5 is an explanatory view showing a laminated material of a packaging bag in which a linear perforation line is formed.

FIG. 6 is an explanatory diagram showing an example of a PET film in a laminated material in which diagonal perforation lines are formed.

FIG. 7 shows a conventional packaging bag, (a) is a perspective view of the packaging bag containing the contents, and (b) is a perspective view showing an opened state of the packaging bag by tearing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Packaging bag 10a ... Side edge of packaging bag 11 ... PET film 12 ... PE layer 13 ... Al layer 14 ... PE layer 15, 15a ... Zipper-shaped cut line on the front and back 21 ... Upper heat seal 22 ... Lower heat seal 23 ... Central heat seal e ... Diagonal cut t ... Linear cut g ... Cut pitch h ... Unprocessed part j, k ... Position of cut line n ... Horizontal width dimension of film p ... Single cut line shape

Claims (4)

[Claims] 1. A packaging bag made of a laminated material mainly comprising a plastic film, wherein the front and back surfaces of the packaging bag are
A packaging bag that is easy to open, characterized in that a zipper-shaped cut line is provided from the upper end edge toward the lower end edge, and the zipper-shaped cut line is opened along the cut line. 2. The zipper-shaped cut line is provided substantially parallel to the side edge of the packaging bag and outside the center line of the packaging bag. A packaging bag that is easy to open. 3. The zipper-shaped cut line is formed by linearly interrupting the lower end of the linear cut into individual shapes by bending the lower end of the straight cut toward the center of the bag at a predetermined angle. The packaging bag according to claim 1, wherein the packaging bag is easy to open. 4. The packaging bag according to claim 1, 2 or 3, wherein the zipper-shaped cut line is provided in at least one layer of a laminated material.