JPS6025401Y2 - packaging bag - Google Patents

Description

[Detailed description of the invention] The present invention relates to a packaging bag made into a cylindrical body with a gassho adhesive part, and more specifically, a part of the gassho adhesive part can be easily peeled off and opened without scattering the contents. The present invention relates to a packaging bag having a part that can be taken out.

Conventionally, when a packaging bag is made of a cylindrical body in which both sides of the packaging material are glued together to form a gassho-adhesive part, and both edges are sealed to form a sealed packaging bag, the gassho-adhesive part can be torn off by hand. Since the package cannot be opened using scissors, it must be cut and opened using scissors or the like.

Depending on the purpose of the packaging bag, there are some that have a cut tape placed around the circumference so that the bag can be opened by pulling it, but since the packaging bag is completely opened, the bag opens wide and there is a risk that the contents may be scattered. Not the point.

Furthermore, a device in which a perforation hole is provided along the gassho adhesive part of the cylindrical body and the seal is opened by tearing a part of the perforation hole by pulling it by hand is disclosed in the Publication of Utility Model No. 42-579. However, depending on the roughness of the perforation, the strength of the packaging material, and the degree of tensile force, there is a risk that the entire package may be torn, and if the package is not opened carefully, the contents may be scattered.

The present invention solves these problems and consists of a cylindrical body in which both sides of the packaging material have a thermally adhesive layer on the inner surface and are bonded together to form a bonded part. This packaging bag was devised for the purpose of providing a packaging bag that can be used as a packaging bag. It is characterized by a structure in which it is partially formed.

The following explanation will be based on the embodiment of the present invention shown in Fig. 1.2.3. Synthesis of polyethylene, polypropylene, polyester, nylon, polyvinyl chloride, etc. having thermal adhesive properties with a thickness of about 10 to 100 μm The outer surface of the resin film has a basis weight of 10 to 200. Packaging material made by laminating one or more films made of paper materials such as cellophane, high-quality paper, glassine paper, etc., or metal foils such as aluminum foil with a thickness of about 7 to 20 μm and cutting them into specified dimensions. 1, both side edges 2, 2. It is made up of a cylindrical body 4 in which the palms are joined together and a heat-adhesive layer made of the synthetic resin film on the inner surface is thermally bonded by heating and pressurizing to form a gash-jointed part 3, and both edges of the cylinder are sealed by heat bonding. In the packaging bag forming the sealing part 5, an easy-opening agent layer 6 of about 20 to 3 cIrL, which is a length that allows a hand or finger to be inserted into a part of the inner surface of one or both of the side edges 2, is provided on both side edges. 2 and 2 are thermally bonded to form a gassho bonded portion 3.

Then, by heating and pressurizing both side edges 2.2, the inner surfaces of both side edges 2, 2 on which the easy-opening agent layer 6 is provided are adhered to be easily peelable, and the thermally adhesive layer on the inner surface of the packaging material 1 is bonded. The parts where the two are directly overlapped are strongly bonded, and the gassho adhesive part 3 and one of the sealing parts 5 are formed to fill the contents inside the bag, and the other sealing part is sealed. 5 and seal it.

The easy-opening agent layer 6 is an ethylene-vinyl acetate copolymer,
An adhesive consisting of an organic solution or hot melt resin containing 5 to 15% of a com-based resin, an ethylene-α olefin elastomer resin, a vinyl chloride-vinyl acetate copolymer, etc. is used, and the adhesive is applied in a coating amount of 0.1 to 5%. .09/yy? The easy-opening agent layer 6 has thermal adhesion and has the function of inhibiting the thermal adhesion of the thermal adhesive layer. It has the property of having weak adhesive properties.

Further, it is preferable that the easy-opening agent layer 6 is provided at the center of the gassho adhesive part 3.

When the cylindrical body 4 is picked up with left and right hands on both sides of the folded adhesive part 3 of the packaging bag according to this embodiment and is pulled in the direction of the arrow in the center of FIG. 1, the easy-opening agent layer 6 Since the side edges 2.2 are weakly bonded to each other in the area where the side edges 2.2 are provided, the inner surface of either side edge 2.2 can be easily peeled off and opened, and the contents can therefore be taken out from this opening. This is possible.

The adhesive part 3' of the gassho adhesive part 3 where the easy-opening agent layer 6 is not provided is firmly adhered by the thermal adhesive layer of the packaging material 1 and will not peel off. It acts to close only the layer 6 portion and does not widen the opening greatly, thus preventing the contents from escaping and scattering.

In another embodiment shown in FIG. 4, the left and right opposing side walls 8 of the cylindrical body 4 are folded inward from the center in the longitudinal direction, and one end edge is sealed by an appropriate means to form a sealed portion 5. The sealing portion 5 is formed by sealing the other edge by an appropriate means after filling the side edge 2 of the packaging material 1 with the contents.
A gassho adhesive part 3 having an easy-opening agent layer 6 is formed.

The packaging bag of this embodiment has a prismatic shape, and is opened by pulling both sides of the gassho adhesive part 3 in the direction of the arrow in the center to peel off the easy-opening agent layer 6.

Fig. 5 shows the side edges 2, 2 of the gassho adhesive part 3 in which the tabs 2', 2' are formed without gluing the edges, and Fig. 6 shows the side edges 2, 2 of the gassho adhesive part 3 formed with the tabs 2', 2'. The tabs 2', 2' are formed without adhering the edges of the easy-opening agent layer 6 coated on each of the inner surfaces of the tabs 2, and according to these configurations, the tabs 2', 2' are By pulling in the expanding direction, the easy-opening agent layer 6 can be peeled off and opened.

As described above, according to the present invention, an easy-opening agent layer made of an adhesive that inhibits the thermal adhesiveness of the thermal adhesive layer on the inner surface of the packaging material and is itself weakly adhesive is formed on a part of the gassho adhesive part. Not only can it be easily peeled off by pulling the part of the easy-opening agent layer to open a predetermined length without using scissors, etc. The heat-adhesive layer of the packaging material forms a strong gassho adhesive area, so it will not peel off, and this adhesive area also acts as a resistor to close the opening without widening it. .

Therefore, even if a strong force is applied to open the package, the opening is precisely formed only in the area where the easy-opening agent layer is provided, and the package does not widen significantly, so that the contents can be taken out without scattering the contents.

[Brief explanation of drawings]

The first figure is a partially cutaway plan view of the embodiment of the present invention;
3 is an enlarged sectional view taken along lines A-A and B-B in FIG. 1, FIG. 4 is a perspective view of another embodiment of the present invention, and FIG.
FIG. 6 is an enlarged partial cross-sectional view of still another embodiment of the present invention. 1... Packaging material, 2... Side edge, 3...
... Gassho adhesion part, 4 ... Cylindrical body, 6 ...
...Easy-opening agent layer.

Claims (1)

[Scope of utility model registration request] In a packaging bag made of a cylindrical body 4 in which both sides 2.2 of a packaging material 1 having a heat-adhesive layer on the inner surface are joined together to form a joined part 3, the heat-adhesiveness of the heat-adhesive layer is A packaging bag characterized in that an easy-to-open agent layer 6 made of an adhesive that inhibits and has weak adhesive properties is formed on a part of the gassho adhesive part 3.