JPH1035695A - Packaging bag with hanging hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packaging bag with a hanging hook which can be used even at a low temperature by welding a separate hanging hook made of a laminate sheet of resin having specific cold resistance to an upper end seal of the bag. SOLUTION: In a packaging bag with a hanging hook constituted by sticking a hanging hook 20 to an upper end seal 10a of a bag, a two-layer laminate sheet comprising cold-resistant polystyrene resin 22 with heat-welding polyolefin resin 23 stuck or a three-layer laminate sheet comprising polyethylene terephthalate resin 21/cold-resistant polystyrene resin 22/heat-welding polyolefin resin 23 may be preferably used as a material of the hanging hook 20. When the hanging hook 20 is to be attached to the upper end seal 10a of the bag, a face of the heat-welding polyolefin resin 23 is overlaid facing the upper end seal 10a and attached by heat welding or ultrasonic welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag with hanging hooks which can be displayed in a low-temperature environment.

[0002]

2. Description of the Related Art Conventionally, as a packaging bag which can be suspended and displayed, a wide sealing portion is provided at an upper end of the bag, a hole is formed in a central portion of the bag, and a stick is hung by passing a rod through the hole, or a key. A type in which a molded article is attached to the upper end of a packaging bag is known.

However, in the case of the former packaging bag, it is necessary to pull out the hanging packaging bag along the rod to take out the packaging bag. There is a problem that a target packaging bag cannot be taken out unless all packaging bags in front of the packaging bag to be removed are removed. In addition, the latter packaging bag has not been commercialized because it has problems such as reduced rigidity and cracks due to dew condensation when used at low temperature such as a frozen showcase, except when used at normal temperature.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems relating to a packaging bag that can be displayed in a suspended state, and more particularly to a packaging bag for a hanging display that can be used at a low temperature such as a frozen showcase. It is an object of the present invention to provide a packaging bag with a hanging hook that can be used even at a low temperature by welding a hanging hook having a separate cold resistance to an upper end seal portion of the bag.

[0005]

Means for Solving the Problems A first invention of the present invention is:
A packaging bag with a hanging hook in which a hanging hook for hanging the bag is adhered to an upper seal portion of the bag,
A hanging bag with a hanging hook, wherein the hanging hook is formed of a laminated sheet composed of polyethylene terephthalate resin / cold-resistant polystyrene resin / heat-welding polyolefin resin.

A second invention is a packaging bag with a hanging hook, wherein the means for bonding the hanging hook and the bag is a heat welding method.

Further, a third invention is the packaging bag with hanging hooks according to claim 1, wherein the means for bonding the hanging hooks to the bag is an ultrasonic welding method.

As described above, according to the present invention, since the hanging hook is composed of a laminated sheet composed of polyethylene terephthalate resin / cold-resistant polystyrene resin / heat-welding polyolefin resin, it has cold resistance and is free from condensation. There is no decrease in rigidity or cracks, and it can be used even at low temperatures requiring cold resistance such as a frozen showcase. Further, since the outer surface of the hanging hook is made of a heat-welding polyolefin resin, it can be easily welded to the upper end seal portion of the bag by a heat welding method or an ultrasonic welding method.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments. The packaging bag with the hanging hook of the present invention is shown in FIG.
As shown in FIG. 2, a hanging hook 20 is bonded to an upper end seal portion 10a of the bag 10, and FIG. 2 is an explanatory diagram showing a layer configuration of the bonded portion.

The packaging bag 1 with hanging hooks according to the present invention comprises:
The bag 10 has a structure in which a hanging hook 20 is adhered to a central portion of the upper end seal portion 10a.

In the present embodiment, the shape of the bag 10 is a pillow bag which is a form of a three-side seal bag having an upper end seal portion, a lower end seal portion, and a palm joint portion at the center of the side wall. Any shape such as a seal bag, a self-standing bag, and a gusset bag may be used. Further, the portion to which the hanging hook 20 is adhered is not particularly limited, but considering the purpose of the hanging display and the strength, the central portion of the upper end seal portion 10a is preferable.

As the laminated structure of the bag 10, the outer layer is generally made of biaxially oriented polypropylene, biaxially oriented polyethylene terephthalate, biaxially oriented nylon or the like, and the inner layer is made of a heat-adhesive material such as polyethylene, polypropylene or polyethylene terephthalate. Resins are generally used, but from the viewpoints of transparency, cold resistance, price, etc., biaxially oriented polypropylene (OP
A laminate of P) and unstretched polypropylene (CPP) can be preferably used. If necessary, a picture layer is provided on the OPP surface by using, for example, a gravure printing method. An OP with a matte finish on the outer surface due to design requirements
A P film can also be used.

The material of the hanging hook 20 is a two-layer structure in which a cold-resistant polystyrene sheet is adhered to a CPP film, or a polyethylene terephthalate (PET) film in consideration of cold resistance, impact resistance, heat-fusing properties, and the like. A three-layer structure of a cold-resistant polystyrene sheet / CPP film can be preferably used. On the surface of the PET film facing the cold-resistant polystyrene sheet, a picture layer is provided as necessary. The thickness of each material is 500 to 1000 μm for the cold-resistant polystyrene sheet and 20 to 60 μm for the CPP film.
μm and a PET film of about 12 to 16 μm are preferably used. The cold-resistant polystyrene sheet and the CPP film, or the cold-resistant polystyrene sheet and the PET film are laminated by, for example, a dry lamination method using a polyurethane adhesive. Note that a coextruded sheet of a colored cold-resistant polystyrene resin and a cold-resistant polypropylene resin can also be used.

The shape of the hanging hook 20 is designed so that the hanging hook 20 can be easily detached from the stick in the horizontal direction when the stick is displayed through the stick so that the consumer does not easily fall off the stick even if touched by hand. In order to achieve this, it is preferable to form a hook (see FIG. 1).

The upper end seal portion 1 of the bag of the hanging hook 20
Attachment to Oa is performed by superposing the hanging hook 20 with the CPP surface side facing the upper end seal portion 10a, and performing the heat welding method or the ultrasonic welding method.

[0016]

EXAMPLES Examples of the present invention will be described below more specifically. Example 1 First, an OPP film 11 having a thickness of 30 μm
Is provided with a picture layer 13 by a gravure printing method.
30μm thick CPP on the surface of the film where the picture layer is provided
The film 12 was adhered by a dry lamination method using a polyurethane-based adhesive to produce a laminated film for a bag.

Next, the laminated film is slit to a required width, and a pillow of a required size having an upper end seal portion 10a and a joint seal portion at the center of the side wall is formed by using a commonly used bag making machine. A packaging bag was made, and a bag 10 was produced.

Separately, a cold-resistant polystyrene sheet (high impact polystyrene (HIPS) / urethane rubber = 9 /
1, manufactured by Dainippon Ink and Chemicals, Inc.) 22 and a 12 μm-thick PE provided with a picture layer 24 by a gravure printing method.
The T film 21 was adhered by a dry lamination method using a polyurethane adhesive so as to face the pattern layer surface.

Subsequently, a 40 μm-thick CP was applied to the surface of the cold-resistant polystyrene sheet to which the PET film was not attached.
The P film 23 was attached by a dry lamination method using a polyurethane-based adhesive to produce a laminated sheet for hanging hooks having the following structure. PET film (12 μm) 21 / pattern layer 24 / adhesive (not shown) /
Cold-resistant polystyrene sheet (800 μm) 22 / adhesive (not shown) / CPP film 23

The laminated sheet for hanging hooks is
C was left in a constant temperature room for 2 days, after aging, slit to a predetermined width, and punched out with a mold to produce a hanging hook 20 having a shape as shown in FIG.

Finally, the hanging hook 20 is overlapped on the center of the upper end seal portion 10a of the bag with the side of the CPP film facing the hanging hook 20, and the hanging hook 20 is welded to the bag 10 by a heat fusion method. This was referred to as a packaging bag 1 with hanging hooks.

<Comparative Example 1> A hanging hook was manufactured using the same material and method as in Example 1 except that a polypropylene sheet (800 µm) made of a homopolypropylene resin was used instead of the cold-resistant polystyrene sheet (800 µm). The same bag 10 as in Example 1 was welded to the center of the upper end seal portion 10a of the bag 10 by a heat fusion method to form a packaging bag with hanging hooks (detailed description is omitted).

Comparative Example 2 Instead of a cold-resistant polystyrene sheet (800 μm), a homopolypropylene resin 9 was used.
A hanging hook was produced using the same material and method as in Example 1 except that a cold-resistant polypropylene sheet (800 μm) kneaded with 10 parts of urethane-based rubber was used for 0 part, and the upper end seal portion of the same bag 10 as in Example 1 was used. The package 10a was welded to the center portion by a heat fusion method to form a packaging bag with hanging hooks (detailed description is omitted).

In order to evaluate the impact resistance of the three types of packaging bags with the hanging hooks thus produced in a low temperature state, a predetermined amount of ice candy is put in, the lower end seal portion is sealed, and the condition at -30 ° C. Then, a vertical drop was performed on the concrete floor from a height of 1.5 m so that the hanging hook first dropped on the floor surface, and the number of bags in which the hook was broken was measured. Table 1 shows the results.

[0025]

[Table 1]

Considering from Table 1, the packaging bag with the hanging hooks of the present invention does not break the hooks even when dropped vertically from a height of 1.5 m at -30 ° C., and even under low temperature conditions. It can be seen that it has a sufficient drop impact strength (Example 1).

[0027]

As described above, according to the present invention, by using a cold-resistant polystyrene resin as the material of the hanging hook, a packaging bag with the hanging hook having improved drop impact strength in a low temperature state can be manufactured. .

[Brief description of the drawings]

FIG. 1 is an explanatory view of a packaging bag with hanging hooks showing one embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing a state where a hanging hook is adhered to an upper end seal portion of the embodiment.

[Explanation of symbols]

1 Packaging bag with hanging hook 10 Bag 10a Sealing at upper end 11 OPP film 12 CPP film 13 Picture layer 20 Hanging hook 21 Polyethylene terephthalate resin, PET film 22寒 Cold resistant polystyrene resin 23 ‥‥ Heat-welding polyolefin resin, CPP film 24 ‥‥ Pattern layer

Claims (4)

[Claims] 1. A packaging bag with hanging hooks, wherein hanging hooks for hanging a bag are bonded to an upper end seal portion of the bag, wherein the hanging hooks are made of polyethylene terephthalate resin / cold-resistant polystyrene resin / A packaging bag with hanging hooks, comprising a laminated sheet made of a heat-welding polyolefin resin. 2. A packaging bag with hanging hooks according to claim 1, wherein said means for bonding said hanging hooks to said bag is a heat welding method. 3. The packaging bag with hanging hooks according to claim 1, wherein said means for bonding said hanging hooks to said bag is an ultrasonic welding method. 4. A packaging bag with hanging hooks according to claim 1, wherein the storage is frozen dessert.