JP3389728B2 - Easy to open packaging bag - Google Patents

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 taking out contents from a packaging bag containing large contents. It concerns packaging bags.

[0002]

2. Description of the Related Art At present, for example, polyethylene terephthalate (PET) / aluminum (Al) in order from the surface layer.
/ Using a laminated material in which unstretched polypropylene (CPP) is laminated, a folded chemical wipe, a wet tissue,
A packaging bag is known in which a toiletry product such as a solid detergent is stored, and the top and bottom and the central part are sealed on three sides by heat sealing. These packaging bags are
The upper heat-sealing surface is used as a cut (for example, a V-notch or the like is formed as a trigger for ripping),
Although it was torn open linearly downward (to tear the cut end of the upper heat-sealing surface back and forth), it could not be torn straight downward.

Therefore, various packaging bags made of a laminated material in which tearable films of uniaxially stretched polypropylene which are cut in the tearing direction (longitudinal direction) are laminated have been studied.
For example, PET (12μ) / Al (7
μ) / Tearable film (25 μ) / CPP (30 μ) laminated bag, and as another example, a package using a tearable film (25 μ) / Al (7 μ) / CPP (30 μ) laminated material It is a bag. The contents having a large three-dimensional shape were stored in these packaging bags, and after opening the upper part by heat sealing, an attempt was made to open it by tearing. Is excellent, but when tearing to open, when the tearing tip reaches the contents of the three-dimensional shape with the retracted tip, the downward tearing force is obstructed by the contents and in the middle of the outward direction. It was bent at an angle and torn by the pulling force on. That is, as shown in FIG. 6, when the contents are stored in a large three-dimensional manner, when the tearing portion reaches the contents, the downwardly directed tearing force is obstructed by the contents, and the outside is interrupted on the way. Due to the pulling force in the direction, it was bent at an angle and torn, and only a small opening was formed and the contents could not be taken out. Also, in the latter case, the opening of the packaging bag by tearing could be done to a size where the contents could be taken out, but since this tearable film is a uniaxially oriented polypropylene (PP) film base. In addition, the melting point is low and the heat resistance is insufficient, the filling suitability is poor depending on the contents to be stored, and there is a problem as a packaging bag.

[0004]

In view of the above problems, the present invention is excellent in filling suitability, barrier property, and the like.
(EN) Provided is a packaging bag in which a large opening can be obtained even when a three-dimensionally shaped content is stored in the packaging bag, and therefore the content can be easily taken out.

[0005]

In order to achieve the above object, the present invention relates to a packaging bag (10) made of a laminated material mainly composed of a plastic film, wherein an upper surface edge to a lower edge of the front and back inner surface layers of the packaging bag. towards, with a predetermined width of the cutting tape (15, 15a), tearing easy unsealing of opening along the inner end surface of the cutting tape (t, t)
The packaging tape, wherein the cut tape is the back surface of the packaging bag.
For the side cut tape (15a),
The position of the flap (15) slightly toward the side edge (10a) of the bag.
Easy-to-open packages characterized by being staggered
It is a bag.

Further, the cut tape (15, 15a)
Is provided in a position parallel to the side edge of the packaging bag and outside the center line (s) of the packaging bag.

[0007]

Further, the cut tape (15, 15)
A) is characterized in that both surfaces are made of heat sealable resin.

The cut tape is made of unstretched polypropylene (22) / polyethylene terephthalate (2
1) / unstretched polypropylene (22).

[0010]

In order to open the easy-open packaging bag of the present invention having the above-described structure, the stored contents are held from the front and back of the bag, and the upper edge inside the position where the cut tape is fused is held. When crotch tearing (tearing by pulling left and right along the inner end of the cut tape), the pulling force in the outer direction (the side end (10a) direction of the bag) tears the bag body, and the tip of the tear tape cuts ( Fifteen, fifteen
a) Upon hitting the inner end face (t, t), this cut tape acts as a breakwater against the pulling force in the outer direction, and this time, the pulling force is applied downward along the inner end face of the cut tape to be torn. Further, when the front side cut tape (15) is heat-sealed to a position slightly displaced in the side end (10a) direction with respect to the back side cut tape (15a), it is cleaved at the time of opening. First, tearing is started along the inner end surface (t) of the back surface side cut tape (15a), and then tearing is performed along the inner end surface (t) of the front surface side cut tape (15). That is, since the pulling force in the outward direction is sequentially concentrated from the inner end surface of the back side cut tape to the inner end surface of the front side cut tape,
It can be torn even with a weak pulling force. Therefore, even if the cut part of the packaging bag reaches the contents,
It can be opened greatly in the vertical direction without bending at an angle.

[0011]

The present invention will be described in detail with reference to the following examples.
As shown in FIG. 1A, the packaging bag (10) of the present invention is
A laminated bag mainly composed of a plastic film is heat-sealed into a packaging bag, and the inner and outer layers of the bag are cut tape in which heat-sealing resin is laminated on both sides from the upper edge to the lower edge ( By fusing 15 and 15a) by heat fusion and cleaving at the time of opening, the cut tape is cut downward along the inner end surface (t, t), so that the packaging bag can be largely opened. The cut tapes (15, 15a) are heat-sealed in parallel with the side edges (10a) of the packaging bag and outside the center line (s) of the packaging bag. The position where the cut tape is fused may be the same position where the front and back inner surface layers face each other.
As shown in (b), the cut tape (15
When the front side cut tape (15) is slightly displaced in the side end (10a) direction of the bag with respect to a) and fused, the cleaving tears to the left and right, the inner end surface (t , T) can be easily opened.

The packaging material in this embodiment is shown in FIG.
As shown in, PET (11) (12μ
m) / Al (12) (7 μm) / CPP (13) (30
(μm) is laminated by dry lamination. A heat-sealable resin was laminated on both sides of a CPP film (13) which is an inner layer of this packaging material.
The cut tapes (15, 15a) of the book are heat-sealed. A tearable resin film such as oriented polypropylene (OPP) can be used as the packaging material, but the packaging material having the above configuration is preferable in consideration of filling suitability and heat resistance.

As shown in FIG. 2, the cut tape (15, 15a) heat-sealed to the packaging material is a CPP (2
2) (20 μm) / PET (21) (38 μm) / CP
It has a structure of P (22) (20 μm). That is, a heat-sealing film is laminated on both sides of a PET film by dry lamination, slit into a predetermined width to form a tape and heat-bonded to the inner surface layer of the packaging material, and then the packaging material is used to form a packaging bag. By using a thick PET film (38 μm) in the middle layer of the cut tape, this cut tape becomes a breakwater so that the cut end does not escape toward the side edge (10a) of the packaging bag when the packaging bag is opened. It can be cut straight down.

Although the cut tape has a step in the state of being temporarily attached to the inner surface layer of the packaging bag, the CPP films (22, 22) on both sides are melted by heat fusion and are fused in a hill shape. In particular, as shown in FIG. 3 (b), the upper and lower heat-sealing surfaces (18, 19) of the packaging bag have four layers including the front and back cut tapes (15, 15a), but the thick CPP melts. The steps are filled, and the packaging bag has sufficient sealing performance.

<First Embodiment> A first embodiment will be described with reference to FIG. A 12 μm-thick PET film (11) is coated on one side with urethane ink (LP Super, manufactured by Toyo Ink Mfg. Co., Ltd.) to provide a pattern layer, and the urethane layer adhesive (Takelac A610, Takeda Chemicals Co., Ltd.) is applied to 1 to 3 g / m ² , and an Al layer (7 μm) is laminated by a dry lamination method.
The urethane adhesive is applied to the back surface of the layer, and a CPP film (30 μm) (GH
C, manufactured by Tohcello Co., Ltd. was laminated and slit to a width of 300 mm to obtain a packaging material. Similarly, CPP (20 μm)
/ PET (38 μm) / CPP (20 μm) is laminated by a dry lamination method to obtain a tape material. The tape material is slit into a strip having a width of 2.5 mm and heat-bonded in parallel to two locations in the vertical direction of the CPP (13) surface of the packaging material, so that the cut tape spreads to a width of about 5 mm and has a hilly shape. Fused to. This cut tape (15,1
5a) is located at the outer end of the packaging material (see FIG. 4 (a)).
Position (e) 30 mm inside from the right side of the packaging material shown in
The cut tape (15) on the front side in the up and down direction and the cut tape (15a) on the back side at an inner position (f) 102 mm from the center line (h) are parallel to the cut tape (15) on the front side. Heat fusion to. The packaging material provided with these two cut tapes was heat-sealed in a bag-making machine to form a gusset bag (see FIG. 4 (b)).

When the chemical rag is stored in this gusset bag and the upper opening is heat-sealed, the heat-sealable resin of the cut tape is melted and the gap is filled up, and the gap is tightly sealed. Suppress the chemical rag from the front and back of this bag, and tear it left and right from the cut end of the upper heat seal on the inner end surface of the cut tape, first tear along the inner end surface of the cut tape on the back side, then the surface It was torn downward along the inner end surface of the cut tape on the side, and the bag could be greatly opened without cutting both cut tapes.

<Second Embodiment> A second embodiment will be described with reference to FIG. PET (12 μm) / Al (7) used in Example 1
μm) / CPP (30 μm) for packaging material,
Two pieces of heat-sealed stretched polypropylene film (31) (25 μm) were used as a cut tape material,
Layers were laminated by the dry lamination method and slit into a width of 2.5 mm to obtain a cut tape. The two cut tapes were heat-sealed to the CPP layer of the packaging material and then subjected to a bag-making machine to form a gusset bag.

After storing the chemical rag in this gusset bag and heat-sealing the upper opening, the chemical rag is suppressed from the front and back of this bag, and it is pulled left and right from the cut end of the upper heat-sealing surface inside the cut tape. If you cleave along the inner edge of the cut tape and the tip of the tear reaches the contents of the three-dimensionally stored contents, the strength of the cut tape is slightly weak and the inner edge of the tape may be torn, It was not bent to the side edge of the car and was not torn.

[0019]

Since the present invention has the above-mentioned constitution, it has the following effects. That is, by placing the cut tape on the inner layer surface of the packaging bag in parallel with the side edges of the packaging bag and outside the center line of the packaging bag, the contents can accommodate a large three-dimensional object having a wide width like a chemical rag. Even if the packaging bag is cleaved, the packaging bag does not bend outward, but is linearly and neatly cut in the vertical direction along the inner end surface of the cut tape, and can be opened greatly to easily take out the contents. be able to.

Since the cut tape is provided on the inner surface layer of the packaging bag with a slight offset, the pulling force to the outside by the crotch tear is concentrated from the back surface side cut tape to the inner end surface of the front surface side cut tape in order. It can be easily torn even with a weak pulling force. Further, the cut tape having the heat-sealable resin provided on both sides has a step in the temporarily attached state, but the heat-sealable resin is melted by heat fusion and is fused in a hill shape. In particular, the upper and lower heat-sealing surfaces of the packaging bag are combined with the cut tape to form four layers, but the heat-sealable resin is melted to fill up the steps and gaps, and is tightly sealed. And cut tape, C
The PP layer / PET layer / CPP layer facilitates heat fusion to the inner surface layer of the packaging bag, and
The PET layer, which is a thick intermediate layer, acts as a breakwater against the outward pulling force caused by the crotch, and this pulling force can be guided in the vertical direction, and various excellent effects such as straight tearing and opening 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 is a cross-sectional view of a cut tape material showing an embodiment of the present invention.

FIG. 3 shows an embodiment of a packaging bag according to the present invention that can be easily opened. (A) is an explanatory view of a temporary attachment state of a cut tape and upper and lower heat sealing surfaces, and (b) is a cut tape and an upper portion. FIG. 6 is an explanatory diagram of a state in which the lower heat-sealed surface is sealed by heat fusion.

FIG. 4 shows an embodiment of a packaging bag according to the present invention, which is easy to open, in which (a) is a plan view in which a cut tape is heat-sealed to the packaging material, and (b) is a bag made using this packaging material. It is a perspective view of the gusseted bag.

FIG. 5 is a cross-sectional view of a cut tape material according to another embodiment.

6A and 6B are views showing a conventional packaging bag, in which FIG. 6A is a perspective view of a packaging bag in which contents are stored, and FIG. 6B is a perspective view showing an opened state by tearing the packaging bag.

[Explanation of symbols]

10 ... Packaging bag 10a ... Side edge of packaging bag 11 ... PET layer 12 ... Al layer 13 ... CPP layer 15 ... Cut tape on the front side 15a ... Cut tape on the back side 17 ... Central heat seal 18 ... Upper heat seal 19 ... Lower heat seal 21 ... PET layer 22 ... CPP layer 31 ... Stretched polypropylene film e, f ... Cut tape fusion position g… Total width of packaging material t ... Inside end surface of cut tape

Claims (4)

(57) [Claims] 1. A packaging bag made of a laminated material mainly composed of a plastic film, wherein a cut tape having a predetermined width is provided from an upper edge to a lower edge of front and back inner surface layers of the packaging bag, and the inside of the cut tape is provided. An easy- to- open packaging bag that is torn and opened along an end face , said cut tape
However, the cut tape on the back side of the packaging bag
The tape position is slightly shifted toward the side edge of the bag.
An easy-to-open packaging bag characterized by being 2. The easy-open packaging according to claim 1, wherein the cut tape is provided in a position parallel to a side end of the packaging bag and outside the center line of the packaging bag. bag. 3. The cut tape is heat-sealed on both sides.
It is made of an organic resin and is characterized in that
Easy-to-open packaging bag described in. 4. The cut tape is unstretched polypropylene.
/ Polyethylene terephthalate / unstretched polypropylene
A laminated material formed by laminating
The easy-open packaging according to any one of claims 1 to 3.
bag.