JPH0794256B2 - Paper 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 paper bag, and more particularly to a moisture-proof paper bag provided with an inner layer tubular body formed of or containing an incombustible material or an incombustible material.

[0002]

2. Description of the Related Art Conventionally, a moisture-proof paper bag is formed by forming a heat-sealable material into the innermost layer tubular body for heat-sealing the end portion of the innermost layer tubular body which directly accommodates contents.
Alternatively, the innermost layer tubular body is formed of a processed paper having an inner surface laminated with a heat-sealable material, while the outer layer tubular body is formed with folding flaps at both ends.

Such a conventional moisture-proof paper bag is disclosed, for example, in Japanese Patent Publication No. 57-37500 and Japanese Utility Model Publication No. 59-298.
As disclosed in Japanese Patent Laid-Open No. 76-76, one end of the inner layer tubular body is heat-sealed, and the folding flap is bent and attached to the wall surface to seal the bottom closed portion.

[0004]

By the way, in recent years, due to the problem of waste disposal, it is expected that it is necessary to consider the handling of the inner layer tubular body when discarding this type of paper bag. That is, as described above, since the heat-sealable inner layer tubular body may be a synthetic resin film or a processed paper laminated with a heat-sealable material, there is an environmental problem when it is incinerated. is there. Further, recently, there is a case where a processed paper in which an aluminum foil is combined is used for the inner layer in order to improve the moisture proof property, and such an inner layer tubular body cannot be incinerated.

Therefore, when discarding this type of paper bag, the outer layer tubular body made of kraft paper is separated from the heat-sealable inner layer tubular body so that only the inner layer tubular body does not burn. It is desirable to treat it separately as garbage.
However, since the bottom part of the moisture-proof paper bag is bent toward the center of the heat-sealing part in the longitudinal direction and the folding flap is attached to the wall surface, the inner layer tubular shape is opened from the opening side after using the contents. Even if you try to pull the body out of the outer tubular body,
There is a problem that the inner layer tubular body is caught at the bottom closed portion and cannot be easily taken out.

An object of the present invention is to solve the above-mentioned conventional problems, and a paper bag in which the outer layer tubular body and the heat-sealable inner layer tubular body can be easily separated after the contents are used. To provide.

[0007]

The paper bag of the present invention has an end portion
Straight line cut and heat sealable non-combustible material or non-combustible material
The inner layer is a tubular body made of a suitable material, and the outer end is
Consists of at least one layer of kraft paper cut straight
Equipped with a bag body with a tubular body as the outer layer, one end of the bag body
Bend at least once in the center of the longitudinal direction, and then open
Enclose and secure with a backing paper with a loop to the bottom, and on the opposite side
Stick the wrapping paper with the unsealing tape on the end and
After applying hot melt to the upper surface of the
Heat sealing the tubular ends of the layer,
Bend the end of the bag main body closer to the center in the longitudinal direction,
The hot melt can be applied to the backing paper to seal the mouth
It is characterized by having made Noh .

[0008]

According to the paper bag of the present invention, the contents can be used.
The opening paper by using the opening tape.
To expose the inner layer and immediately below the heat-sealed area.
Cut with a knife etc. to open and discharge the contents. This
As a result , when the contents in the paper bag are used up and the paper bag is emptied, the patch paper forming the bottom closed portion on the opposite side is torn by the opening tape. As a result, the bottom of the bag body is loosened, the inner layer tubular body is not caught by the outer layer tubular body at the bottom side, and the inner layer tubular body is inserted into the outer layer tubular body from the already opened mouth side. Once pulled out, it can be easily pulled out and the two layers separate.

[0009]

EXAMPLES The paper bag of the present invention will be described in more detail with reference to the examples shown in the drawings. FIG. 1 schematically shows a paper bag 10 according to an embodiment of the present invention. The paper bag 10 of this embodiment includes a bag main body 13 including a pleated inner layer tubular body 11 made of a synthetic resin film such as a polyethylene film and a pleated outer layer tubular body 12 made of kraft paper.
The bag body 13 is formed by cutting both ends thereof in a straight line. Such a bag body 13 can be easily formed by a conventional manufacturing apparatus.

The film, which is the inner layer tubular body 11, is heat-sealed on one end side of the bag body 13 according to a conventional method. Next, this one end side of the bag body 13 is bent toward the center in the longitudinal direction from the heat seal part 14 of the inner layer tubular body 11, and the bent end is surrounded and fixed by the patch paper 16 with the opening tape 15, and the bottom closing part 17 is provided. To form.

On the other hand, at the mouth closing part of the paper bag 10,
It is formed by exactly the same closed the bottom closure portion 17 after the contents-filled. That is, when the contents (not shown) are filled in the inner-layer tubular body 11, the end portion of the inner-layer tubular body 11 is heat-sealed, and the bag main body is located at a position closer to the center in the longitudinal direction than the heat-sealing portion 18. Bend 13 and surround and fix it with patch paper 20 with unsealing tape 19 to form the mouth closure.

When taking out the contents from the paper bag 10,
The opening tape 19 at the mouth closing portion is pulled up to tear the backing paper 20, and then the folded portion of the bag body 13 is returned to the original position and cut at a position closer to the center in the longitudinal direction than the heat seal portion 18 of the inner tubular body 11. Then open it.

When the paper bag 10 is emptied by using all the contents, the opening tape 15 at the bottom closing portion 17 is pulled up to tear the patch paper 16 and the bending of the bottom end of the bag body 13 is released. As a result, the relative engagement relationship between the inner layer tubular body 11 and the outer layer tubular body 12 disappears, and the inner layer tubular body 11
Both are easily separated by pulling out from the mouth end side. If the paper bag 10 gets dirty during transportation,
The inner layer tubular body 1 with the contents kept in the inner layer tubular body 11
When 1 is taken out from the outer layer tubular body 12 and used,
As already inferred from the above description, the bottom of the paper bag 10
Pad 16 on the closing part 17 and a pad on the mouth closing part side
Tear the paper 20 together to release the fold and then the outer layer cylinder
When only the cylindrical body 12 is lifted, the inner layer cylindrical body 11 itself
It comes out from the lower open end of the outer layer tubular body 12 due to the weight. in this way
The inner layer tubular body 11 can be easily formed into an outer layer tubular shape even before the contents are used.
It can be separated from the body 12. Also, one of the paper bag 10
When the end, that is, one end of the outer layer tubular body 12 is opened, the inner layer tubular shape is
The inner layer tubular body is immediately filled with the contents without performing the opening operation of the body 11.
It is also possible to take it out from 11. in addition
Without heat-sealing one end of the inner layer tubular body 11.
Comes with opening tape by bending 2 to 3 times together with outer layer tubular body 12
It can be sealed with a piece of paper and used as a bottom closure. This
By doing so, when removing the contents, this bottom closure is
If you open it in the same way as described above and return the fold, the inner cylinder
Since the end of the body 11 is already open, the heat seal part
No need for troublesome operations such as cutting.

[0014] In this case of the embodiment shown in FIG. 1, it is exactly the same structures mouth closure portion eventually bottom closure portion 17, may be either in the open mouth, importantly mouth bottom
It is also that you have to be able to open.

Typically, the bottom closure 17 is formed by the bag maker and the mouth is closed after the user has filled the contents. For this reason, many users use a pinch bag for a paper bag consisting of a plurality of tubular bodies with stair cut ends, but a special machine for closing the mouth (top sealer).
As shown in Fig. 2, the top sealer can be used to close it.

That is, one ends 21a and 22a of two auxiliary flaps 21 and 22 having the same width as the outer wall surface are fixed to the outer wall surface 13a on one side at the mouth of the bag body 13 described with reference to FIG. . The one auxiliary flap 21 has a length such that the other end 21b projects outward from the mouth edge of the bag body 13, and the other one auxiliary flap 22 is arranged so as to overlap the outside of the auxiliary flap 21. And other end 22
The length b is set to project further outward than the end portion 21b of the inner auxiliary flap 21.

One end 22a of the outer auxiliary flap 22
Is not only adhered to the back surface of the inner auxiliary flap 21, but also beyond the one edge of the auxiliary flap 21 to a position directly facing the outer wall surface 13a of the bag body 13 and the outer wall surface 13a.
In terms of strength, it is preferable to bond them together. Then, the unsealing tape 24 is attached to the inner surface of the inner auxiliary flap 21 of the two-layered auxiliary flaps 21 and 22 at a position near the edge of the bag body 13.

In this way, the two auxiliary flaps 21,
The mouth portion of the bag body 13 provided with 22 has a substantially stepped surface including the mouth end portion thereof.
The hot-melt adhesive 25 is applied only to the stepped surfaces at the other ends 21b and 22b of the second. After filling the contents, the inner layer tubular body 11 at the mouth is heat-sealed, and the mouth is closed using the above-mentioned top sealer as shown in FIG. The bottom closing part 17 is the same as the example shown in FIG.

According to such a paper bag, after filling the contents by using the top sealer which the user has in the past,
The inner layer tubular body 11 can be easily closed after heat-sealing the mouth. In the embodiment shown in FIG. 3, either the mouth closing portion or the bottom closing portion 17 may be the opening opening in the future. Further, the bottom closing portion may have the same structure as the mouth closing portion.

[0020] In the embodiments described above, but the bag body was used which is linearly cut with uniform all layers at both ends, the straight line
The layers may be shifted by cutting. Also, the filling side
Are not shown in the figure, but usually each side is
The front and back are treated to ensure that they open when filling.
However, in this case, use a glue that gently peels between the inner and outer layers.
Better to use.

Further, although the synthetic resin film such as the polyethylene film is used as the inner layer tubular body in the above-mentioned embodiment, the present invention is not limited to this, and the inner surface can be variously heat-sealed. Needless to say, a synthetic resin film or a processed paper provided with a metal foil can be used.

[0022]

As described above, according to the paper bag of the present invention, the inner layer cylindrical shape made of a non-combustible material or a material improper to burn is used.
After filling the body with the contents from the open end, this inner layer tubular shape
Heat seal the end of the filling port of the body,
Bend the end of the bag body toward the center in the longitudinal direction, and
You can seal the mouth by sticking backing paper with a lt.
In the paper bag of the present invention containing the contents in this way
To separate the inner-layer tubular body from the outer-layer tubular body.
Tear the backing paper of the closed part with the opening tape,
The inner layer tubular body and the outer layer can be easily
The engagement with the layered tubular body can be released, and as a result, the inner layer can be easily
The tubular body can be pulled out from the outer layer tubular body and separated. Obey
Made of non-combustible material or improperly burned material
It becomes possible to appropriately dispose of the inner layer tubular body .

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory cross-sectional view showing a paper bag according to an embodiment of the present invention with a mouth part also closed.

FIG. 2 is a configuration explanatory sectional view schematically showing a bag body that constitutes a paper bag according to another embodiment of the present invention.

FIG. 3 is a schematic configuration explanatory cross-sectional view showing a paper bag constituted by the bag body shown in FIG. 2 and showing a state in which the mouth portion is closed after filling the contents.

[Explanation of symbols]

 10 Paper Bag 11 Inner Layer Cylindrical Body 12 Outer Layer Cylindrical Body 13 Bag Body 14 Heat Sealing Part 15 Opening Tape 16 Patch Paper 17 Bottom Closing Part 18 Heat Sealing Part 19 Opening Tape 20 Patching Paper 21 Auxiliary Flap 22 Auxiliary Flap 24 Unsealing Tape

Claims (1)

[Claims] 1. The end portion is straight cut and can be heat-sealed.
A noncombustible material or combustion consists inappropriate material tubular body (1
The outer layer is a tubular body (12) made of at least one layer of kraft paper , the outer layer of which is 1) as an inner layer and the end of which is cut straight.
A bag main body (13), which is bent at least one turn toward the center in the longitudinal direction at one end of the bag main body, and then is surrounded and fixed by a backing paper with an unsealing tape to form a bottom.
Stick the wrapping paper with the unsealing tape on the
After applying hot melt to the surface of the part and filling the contents,
The end portion of the tubular body is heat-sealed, and
Bend the end of the bag body near the center in the longitudinal direction,
It is possible to seal the mouth by sticking the above-mentioned backing paper with hot melt
A paper bag with a separable inner layer .