JPH018520Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a moisture-proof multilayer bag that is easily degassed.

[Prior art and its problems]

Conventionally, this type of moisture-proof multi-layer bag is a multi-layer bag consisting of an inner paper layer 1, an intermediate moisture-proof layer 2, and an outer paper layer 3 as shown in FIG. The outer stacked end 1b is bonded to the body 5, and the inner stacked end 3a and the outer stacked end 3 of the outer paper layer 3 are bonded together.
b is attached to the body 6.

However, in such a conventional multilayer bag, when internal pressure is applied to the inside of the bag in an attempt to degas it, the inner and outer overlapped ends 2a and 2b of the moisture-proof layer 2 come into close contact, making it difficult to degas the bag, and the bag eventually collapses. The problem remains that they can burst due to the internal pressure caused by the air they contain.

[Means for solving problems and their effects]

The present invention has the following configuration in order to solve the problems of the conventional moisture-proof multilayer bags of this type. In other words, in a multilayer bag in which at least the innermost layer is paper 1, which is an air-permeable layer, and the moisture-proof layer 2, which is an impermeable layer, is provided in addition to the innermost layer, and the ends are closed, the moisture-proof layers 2, 2 are formed at the body patch part. The moisture-proof layer 2 is attached to the body, and is integrated with the paper layer 1, which is an inner layer from the moisture-proof layer 2, at the adhesive part 4, and the outer layer is the outside of the moisture-proof layer 2. The end 2b is located within the area of the pasting part 4, that is, the pasting part 4 protrudes from the outer overlapping end 2b by the width θ, and furthermore, the outside overlapping end 1b of the inner paper layer 1 is located within the area of the moisture-proof layer 2.
The inner stacked end 2a of the moisture-proof layer 2 protrudes from the inner stacked end 2a of the inner paper layer 1.
The inner paper layer 1 is sandwiched between the inner paper layer 1 and the outer stacked edge 1b, and the inner stacked edge 1a and the outer stacked edge 1b are arranged side by side along the adhesive 4. The body is attached 5.

In the present invention, by adopting the above-mentioned configuration, when filling the contents, the inner overlapped end 2a of the moisture-proof layer 2 hangs down to the outer overlapped end 2b due to the internal pressure generated by the contained air, and the inner overlapped end 2a of the moisture-proof layer 2 The overlapped ends 2 of the moisture-proof layers 2, 2 are easily degassed without coming into close contact with the outer overlapping ends 2b, and when the degassing is completed, due to the load of the contents themselves, the overlapping ends 2 of the moisture-proof layers 2, 2 are strained by the bag body.
This has the advantage that a and 2b are in close contact with each other and moisture resistance can be sufficiently maintained.

[Explanation of Examples]

Examples of the present invention will be described below.

In the drawings, 1 is an inner paper layer, 2 is an intermediate moisture-proof layer,
3 is an outer paper layer, 4 is an adhesion part in the body adhesion part that adheres the inner paper layer 1 on the inside and the moisture-proof layer 2 on the inside of the moisture-proof layer overlap part, and 5 is the inside part in the body adhesion part. This is a body pasting part for pasting the inner paper layer 1 and the outer inner paper layer 1. Reference numeral 6 denotes a body pasting portion of the outer paper layers 3, 3.

That is, the intermediate moisture-proof layers 2, 2 are simply placed one on top of the other without being attached to the body.

In addition, the intermediate moisture-proof layer 2 which is the inner side of the body patch part
and the inner paper layer 1, which is the inner side, are pasted by the pasting section 4.

The adhesive portion 4 protrudes from the outer stacked end 2b of the moisture-proof layer 2 on the outer side.

In addition, the inner paper layer 1 which is the outer side in the body pasting part
The overlapping end 1b of is overhanging from the overlapping end 2a of the inner intermediate moisture-proof layer 2, and the inside overlapping end 2a of the moisture-proof layer 2
is sandwiched between the inner stacked end 1a and the outer stacked end 1b of the inner paper layer 1, and is overlapped and integrated,
In addition, the body sticking part 5 has a structure in which the inner stacked end 1a and the outer stacked end 1b of the inner paper layer 1 are arranged side by side along the stuck part 4.

The purpose of the configuration of is explained above.

As shown in FIG. 4, when deaerating the multilayer bag of the present invention, the air contained in the bag first passes through the inner paper layer 1, and then passes through the outer stacked end 1b and the inner stacked end 1a of the inner paper layer 1. The space between the inner stacked end 2a of the moisture-proof layer 2 and the outer stacked end 2b of the moisture-proof layer 2 which are attached and laminated is opened, and the film passes through this open gap and further passes through the outer paper layer 3 to the outside of the bag. is exhausted to.

In this case, when internal pressure is applied within the bag, the contained air first permeates the entire circumference of the inner paper layer 1, which is a breathable layer, and then passes all around the inner wall of the moisture-proof layer 2, which is a non-ventilated layer. It is filled with the air contained above.

At this time, the inner stacked end 2a of the moisture-proof layer 2 is connected to the inner stacked end 1a of the inner paper layer 1 on the inside thereof, and the adhesive 4
and the outer stacked end 2b of the moisture-proof layer 2
is located within the area of the adhesive part 4, that is, the area of the adhesive part 4 overhangs the outer overlap edge 2b of the moisture-proof layer 2 by the width θ, and further extends beyond the outer overlap edge 2b of the inner paper layer 1. 1b is the inner lapped end 2a of the moisture-proof layer 2
The inner stacked end 2a of the moisture-proof layer 2 is sandwiched between the inner stacked end 1a and the outer stacked end 1b of the inner paper layer 1, and Inner overlap end 1a and outer overlap end 1
b are arranged in parallel along the adhesive part 4 at a position near the side edge of the inner lapped end 2a of the moisture-proof layer 2, and the body adhesive 5
This is what has been done.

For this reason, as described above, the inner paper layer 1 of the body panel 5
Since the inner stacked end 1a of the moisture-proof layer 2 and the inner stacked end 2a of the moisture-proof layer 2 are laminated together, this part becomes a significantly rigid body, and the inner stacked end 2a of the moisture-proof layer 2
are the inner stacked end 1a and the outer stacked end 1b of the inner paper layer 1.
Since the inner overlapped ends 2a of the moisture-proof layer 2 are arranged in parallel and attached to the body 5 near the side edges of the inner overlapped ends 2a of the moisture-proof layer 2, the inner overlapped ends 2a of the moisture-proof layer 2 are exposed to internal pressure. When the inner paper layer 1 is stretched, it does not swell beyond the inherent expansion of the inner paper layer 1, but the outer stacked end 2b of one moisture-proof layer 2 is bonded and integrated with the inner paper layer 1 on the inside. Because there is no overlap and it is flexible, compared to the inner overlap end 2a of the moisture-proof layer 2, when internal pressure is applied due to the contained air pressure, the outer overlap end 2b and the inner overlap end 2a of the moisture-proof layer 2 are easily separated. Since the bag is opened, the contained air passes through the open gap and further permeates the outer paper layer 3 to be evacuated to the outside of the bag.

If the inner folded end 1a of the inner paper layer 1 is
If the inner overlapped end 2a of the moisture-proof layer 2 is not attached 4, when internal pressure is applied to the area where the inner overlapped end 2a of the moisture-proof layer 2 is attached 4 as shown in FIG. When the inner overlapped ends 2a and the outer overlapped ends 2b of the moisture-proof layer 2 overlap each other in close contact with each other, this portion is closed and it becomes difficult to remove air.

In addition, if the inner overlapped end 1a of the inner paper layer 1 and the inner overlapped end 2a of the moisture-proof layer 2 are
Even if the outer lapped edge 2 of the moisture-proof layer 2
When b is not located within the area of the sticking part,
That is, the outer stacked end 2b of the moisture-proof layer 2 is attached to the adhesive part 4.
When the above-mentioned width θ is not provided, as shown in FIG. The moisture-proof layer 2 hangs down on the outer overlapped end 2b, and the inner overlapped end 2a and the outer overlapped end 2b of the moisture-proof layer 2 come into close contact with each other, making it difficult to remove air.

In addition, the inner stacked end 2a of the moisture-proof layer 2 is connected to the inner paper layer 1.
Coupled with the fact that the outer stacked end 1b and the inner stacked end 1a of When the body patch 5 is not arranged in parallel with the adhesive 4, as shown in FIG. 7, the inner overlap end 2a of the moisture-proof layer 2 swells due to internal pressure and hangs down to the outer overlap end 2b, causing the inner overlap of the moisture-proof layer 2 to swell. The moisture-proof layers 2, 2 close each other at the end 2a and the outer overlapped end 2b, making it difficult to remove air.

Note that the inner stacked end 2a of the moisture-proof layer 2 is the inner paper layer 1.
The inner stacked end 1b of the inner paper layer 1 is sandwiched between the outer stacked end 1b and the inner stacked end 1a of the inner paper layer 1.
Instead of the body adhesive 5 being arranged in parallel with the adhesive 4 along with the outer overlap edge 1b, the body adhesive 5 is extended to the full side edge of the inner overlap edge 2a of the moisture-proof layer 2, and the inner layer By arranging the body adhesive 5 of the paper layer 1 at an arbitrary position, that is, the body adhesive 5 allows the inner stacked end 2a of the moisture-proof layer 2 to reach the side edge of the inner stacked edge 2a of the moisture-proof layer 2. When the structure is such that the inner stacked end 1a of the inner paper layer 1 and the inner stacked end 2a of the moisture-proof layer 2 are integrated and are made rigid, and the body panel 5 of the inner paper layer 1 is provided, internal pressure is applied. When this happens, the problem that the inner overlapped end 2a of the moisture-proof layer 2 swells and hangs down to the outer overlapped end 2b does not occur. Although it is not necessary, it is technically difficult to apply adhesive to the body 4 up to the side edges of the inner overlap ends 2a of the moisture-proof layer 2, and the adhesive used for the body attachment 5 does not cover the inner overlap ends 2a of the moisture-proof layer 2. If it protrudes from the side edge of 2a, parts other than the necessary parts will be adhered, which will cause trouble in bag making work or in deaeration, which is the objective of the present invention.

Therefore, the inner overlapped end 2a of the moisture-proof layer 2 is sandwiched between the outer overlapped end 1b and the inner overlapped end 1a of the inner paper layer 1, and the inner overlapped end 1a of the inner paper layer 1 and the outer overlapped end 1a are overlapped. It is preferable to adopt a structure in which the body adhesive 5 is arranged in parallel with the adhesive 4 at the end 1b.

Further, after filling, as shown in FIG. 5, the inner overlapping ends 2a and 2b of the moisture-proof layer 2 are brought into close contact with each other due to tension over the entire outer periphery of the bag due to the pressure due to the weight of the filling material, thereby ensuring moisture-proof performance.

[Effect of idea]

When filling the contents, the inner overlapped end 2a of the moisture-proof layer 2 does not come into close contact with the outer overlapped end 2b, ensuring good deaeration performance, and after filling, the entire outer periphery of the bag due to the weight of the contents. Due to the tension, the inner and outer stacked ends 2a and 2b are sealed, and the moisture-proof performance is also good.

[Brief explanation of the drawing]

Figure 1: Partially cutaway perspective view of the multilayer bag of the present invention, Figure 2
Figure: The same cross-sectional view, Figure 3: An exploded view of the state shown in Figure 2, Figure 4: A cross-sectional view showing the state when internal pressure is applied to the bag of the present invention, Figure 5: The same cross-section after filling. Figure 6: Cross-sectional view when there is no adhesive part 4 and internal pressure is applied, Figure 7: When the outer stacked edge 1b of the inner paper layer 1 cannot press the outside of the inner stacked edge 2a of the moisture-proof layer 2 , sectional view when internal pressure is applied, No. 8
Figure: A cross-sectional view of a conventional multilayer bag when internal pressure is applied due to the air contained in the contents. A cross-sectional view of the case. 1: Inner paper layer, 1a: Inner overlap end, 1b: Outer overlap end, 2: Intermediate moisture-proof layer, 2a: Inner overlap end, 2
b: outer overlapped end, 3: outer paper layer, 3a: inner overlapped end, 3b: outer overlapped end, 4: pasted part, 5: body pasted part, 6: body pasted part.

Claims (1)

[Claims for Utility Model Registration] In a multilayer bag in which at least the innermost and outermost layers are paper 1 and 3, a moisture-proof layer 2 is provided in addition to the outermost layer, and the ends are closed, the inner overlapped end 1a of the inner paper layer 1 and Outer overlap end 1b
In addition, the outer paper layer 3 has an inner stacked edge 3a and an outer stacked edge 3b covered with a shell 6, and the inner and outer stacked ends 2a and 2b of the moisture-proof layer 2 are not bonded to the shell. Overlapping, on the other hand, the inner overlapped end 2a of the moisture-proof layer 2 is the inner paper layer 1
The inner stacked end 1a of the paper layer 1 is attached and integrated with the adhesive part 4, and the attached part 4 protrudes from the outer stacked edge 2b of the moisture-proof layer 2. Furthermore, the outer stacked edge 1b of the inner paper layer 1 is attached to the moisture-proof layer 2. 2. A moisture-proof multilayer bag, characterized in that the outer edge of the inner folded end 2a of the bag 2 is protruded so as to press down on the outer edge.