JP2009166905A - Gas storing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging member easily manufactured and stably packaging articles in it, and also to provide its manufacturing method. <P>SOLUTION: The packaging member 10 packs packaging articles, wherein air cells 20 are formed and sealed by heat welding of plastic films 30 superposed on each other. The packaging member 10 consists of at least three plastic films 31, 32, 33, and is provided with a plurality of the air cells 20 for storing a gas, wherein the gas is prevented from leaking out of the air cells 20 filled with the gas through a suction opening 24. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a gas storage method for enclosing a gas such as air.

In general, various industrial products such as daily necessities and home appliances are packed, transported, and stored using a box-like material such as a cardboard box. At this time, for example, a plastic sheet with an air cap should be wrapped in multiple layers so as to protect the entire product including corners and edges so as not to impact the packaged items inside the box. Has been done.
However, a plastic sheet having such an air cap is often discarded after being used once, and there is a high voice that it is not preferable from the viewpoint of environmental protection such as a dust disposal problem. Further, even when transported and accumulated in a warehouse before being used for packing, the volume of the air cap for the entire plastic sheet is large, so the transportation cost and warehouse cost are high, which is very uneconomical. Therefore, there is a need for a packaging member that does not take up space in volume and that does not give an impact.

For example, Patent Document 1 discloses a packaging material including a sheet and a plurality of types of protrusions that are hollow and have different shapes including gas on the sheet. Thus, it is described that a packaging material having properties of a protective member and a buffer member can be provided. However, even if it can be used as a buffer member, there is no description regarding the above-mentioned problems.
Moreover, in patent document 2, it forms from the supply path formed from a 1st film layer and a 2nd film layer, a 1st film layer, and a 2nd film layer, and is connected to the terminal of a supply path via a check valve, A cushioning packaging material comprising a plurality of injection chambers having pores in the second film layer and a plurality of air chambers formed by the second film layer and the third film layer having pores is disclosed. Patent Document 3 discloses an airbag-type packaging cushioning material in which two resin films having a rectangular shape are overlapped and an air blowing member having a check valve structure is attached. A heat seal portion is formed on the outer peripheral edge by heat sealing, and an adhesive is printed on a predetermined position of at least one of the two resin films to provide a buffering function by contacting air circulation and a package sealing portions of compartment for forming an air chamber which is that is disclosed cushioning material to the formation of an adhesive seal.

However, in any case, providing a check valve in each air chamber requires a large number of check valves. For this reason, it is difficult to continuously produce check valves, and manufacturing productivity is increased. There is a problem that it is difficult to increase the value. In addition, compared with a film or the like, there is a problem that a check valve that is very small must be provided, resulting in a buffer packaging material or the like having a complicated structure.
Then, this invention is made | formed in view of the said problem, The subject is providing the gas accommodation method which can manufacture simply and continuously and accommodates gas, such as air .

The features of the present invention, which is a means for solving the above problems, are listed below.
That is, the gas storage method of the present invention is a gas storage method in which a plastic film is superposed and heat-welded and the gas is stored in an air chamber that stores the gas therein. Then, a slit is cut in a plastic film having flexibility therein, and three sheets are thermally welded simultaneously to form an air chamber, and the air chamber is filled with gas from the slit, and the pressure by the filled gas Then, the inside plastic film is brought into close contact with one of the two outer plastic films so that the filled gas is not leaked to the outside.
Moreover, the gas storage method of the present invention further includes that the introduction path for introducing the gas is formed by the flexible plastic film in the inside and one of the two outer plastic films. Features.
The gas storage method of the present invention is further characterized in that a release agent is applied to the introduction path for introducing the gas.

The gas storage method of the present invention is a gas storage method of storing and filling a gas in an air chamber in which a plastic film is superposed and heat-sealed to store the gas therein, and the four plastic films having heat sealability A slit is cut in two flexible plastic films inside, and four are heat-welded at the same time to form an air chamber. The air chamber is filled with gas from the slit, and the filled gas is used. The two plastic films inside are brought into close contact with any one of the two outer plastic films by pressure so that the filled gas is not leaked to the outside.
The gas storage method of the present invention is further characterized in that an introduction path for introducing gas is formed by the two flexible plastic films in the above.
The gas storage method of the present invention is further characterized in that a release agent is applied to the introduction path for introducing the gas.

As described above, the gas storage method of the present invention can provide a gas storage method that encloses a gas such as air .

It is the schematic which shows the structure of the packaging member of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the structure of an air chamber, (a) is a top view and sectional drawing which show the schematic structure of one air chamber, (b) is sectional drawing when an air chamber is filled with air. . It is the schematic which shows the structure of the air chamber which is other embodiment, (a) is sectional drawing which shows schematic structure of one air chamber, In (b), it is a cross section when the air chamber is filled with air. FIG. It is the schematic which shows the manufacturing method of the packing member of this invention. It is the schematic which shows the part to heat-weld.

The best mode for carrying out the present invention will be described below with reference to the drawings. Note that it is easy for a person skilled in the art to make other embodiments by changing or correcting the present invention within the scope of the claims, and these changes and modifications are included in the scope of the claims. The following description is an example of the best mode of the present invention, and does not limit the scope of the claims.
FIG. 1 is a schematic view showing the configuration of the packaging member of the present invention.
The packing member 10 of the present invention is provided with a large number of small air chambers 20. In the same manner as an air cap type packing material in which an air cap is provided on a plastic film, the material to be packed is wrapped and wrapped so as to absorb and buffer the impact. Moreover, the air cap type packing material is difficult to transport and store because it is filled with air from the beginning. However, the packing member 10 of the present invention is easy to transport and store because it inflates the air chamber 20 by injecting air during use.

As shown in FIG. 1, the packing member 10 of the present invention includes an injection port 11 that is an inlet for injecting air and sending it into the interior, a first communication path 12 through which the injected air passes, and the first The second communication path 14 that corresponds to a tributary from the communication path 12 of the second communication path 12 communicates with the air chamber 20. The air chamber 20 is expanded by the air injected from the injection port 11.
At this time, air is injected from the first communication path 12 into the second communication path 14 through the first communication port 13. As shown in FIG. 1, the second communication path 14 communicates with each air chamber 20 and injects air through the second communication port 22.
FIG. 2 is a schematic diagram showing the configuration of the air chamber 20, and FIG. 2 (a ) is a plan view showing the schematic configuration of one air chamber and a cross-sectional view cut along a BB ′ cutting line. FIG. 2B is a cross-sectional view when the air chamber 20 is filled with air.
As shown in FIGS. 1 and 2, the air chamber 20 includes an introduction path 23 that guides air and an air inlet 24 that blows air into the air storage portion 21. The introduction path 23 is preferably a zigzag narrow path structure. The introduction path 23 is preferably thin to obtain a certain length. By narrowing the introduction path 23, it is possible to adjust the time for filling the air storage portion 21 with air.
To continue to narrow the second communication path 14 increases the air chamber 20 air from the air chamber 20 near the first communicating passage 12 is filled, this introduction path 23 is shorter first communication path The air may be slow to be injected into the air chamber 20 far from 12.
Moreover, this blower opening 24 cut | incised as a slit on a film. As a result, air is injected from the introduction path 23 into the air storage portion 21. This blowing port 24 may be cut into a U-shape. By making it U-shaped, the area for injecting air can be increased, so that the air injection speed can be increased. Further, by constituting the air storage portion 21 with a plastic film having flexibility, after air in the air storage portion 21 is filled, by which is easy to deformation, easily pressed against the other film surface Therefore, air leakage can be reduced.

More specifically, as shown in FIG. 2, a first plastic film 31 and a second plastic film 32 serving as a base are disposed, and a third plastic film 33 is disposed therebetween. As shown in FIG. 2 (a), air is filled from the inlet 11 through the inlet 24 into the air storage portion 21. The air is injected by inserting a straw through an inlet 11 provided on one film. The black arrows in FIG. 2 indicate the air flow, and the white arrows indicate the pressing force.
At this time, as shown in FIG. 2B, the third plastic film 33 is pushed up under pressure in the direction of the arrow. When the third plastic film 33 is pushed up and brought into close contact with the first plastic film 31, the blowing port 24 and the introduction path 23 are narrowed. As a result, the injection of air is restrained in a self-limiting manner and stops when a certain amount of air is filled. After the air is filled, the blowing port 24 made of a highly flexible plastic film is pressed from the inside by being pressed by the other first plastic film 31 forming the introduction path 23, and the air in the air storage portion 21 is There is no leakage.

Conventionally, a check valve is used to enclose air in an air cushioning material in which, for example, a plastic film is thermally welded to form a bag and air is enclosed therein. In other words, two sheets of printed and coated release agent for preventing welding through the center of the heat-weldable plastic film are stacked, and both sides are sandwiched between the heat-welded plastic film. Often used. However, such a check valve is troublesome because it includes different processes of printing and heat welding. In particular, the check valve must be disposed on the plastic film before heat welding, which is not practical due to high cost due to low productivity.
Moreover, even in terms of non-return performance, this valve only opens the air flow path when the two films are pushed by the pressure difference between the inside and outside, so it opens when mechanical strain is applied, Air leaks and is not very reliable. However, the packing member 10 of the present invention, without using a check valve, by providing a blowing port 24 to a high flexible plastic film, blow port 24 forms the introduction passage 23 by the pressure of the filled air It can be pressed against the other first plastic film 31 to prevent air leakage.
In addition to productivity, if a check valve is mounted in each air chamber, a large number of check valves are required, which is costly and impractical. The packaging member 10 of the present invention can achieve this by simply using a flexible plastic film without using a check valve.

FIG. 3 is a schematic diagram showing a configuration of an air chamber 20 according to another embodiment, FIG. 3 (a ) is a cross-sectional view showing a schematic configuration of one air chamber, and FIG. 3 (b ) is an air diagram. It is sectional drawing when air fills a chamber. Here, in FIG. 2, one film 33 is disposed between the first plastic film 31 and the second plastic film 32 in the packing member 10, but two or more sheets may be disposed. As shown in FIG. 3, in the packaging member 10 of the present invention, the introduction path 23 and the blowing port 24 are configured by two films 33 and 34 . When air is filled in the air storage part 21, the pressure of the air storage part 21 increases, the air chamber 20 expands, and the introduction path 23 and the blowing port 24 are blocked by the internal pressure. As shown in FIG. 3, the introduction path 23 or the like stays in the air storage portion 21 or may be pressed and adhered to the first plastic film 31 or the like, but in any case, air is filled with internal pressure. After that, the air inlet 24 is closed from the inside, and the air of the air accommodating part 21 does not leak.

Moreover, the manufacturing method of the packaging member 10 of this invention is demonstrated.
4 and 5 are schematic views showing a method for manufacturing the packaging member 10 of the present invention. A third plastic film 33 is stacked under the first plastic film 31, and a second plastic film 32 is stacked thereunder. As shown in FIG. 4, the first plastic film 31 and the second plastic film 32 are films that do not need to be processed. The third plastic film 33 inserted between the plastic films 31 and 32 is processed with a release agent or the like.
FIG. 5 is a schematic view showing a portion to be thermally welded. As shown in FIG . 4 and FIG. 5 (a), first, a release agent is used to cut through with a large number of thin blades to provide a blowing port 24 and to prevent thermal welding to form the communication ports 13 and 22. The printed and coated third plastic film 33 is superposed on the first plastic film 31 and thermally welded to form the introduction path 23 and the communication ports 13 and 22. Further, as shown in FIG. 5B, the second plastic film 32 and the first and third plastic films 31 and 33 that have been heat-welded are stacked and heat-welded at the same time. Accordingly, the air chambers 20 can be provided individually and independently, and even if a hole is formed in one air chamber 20, air is not leaked from the other air chambers 20 because they are independent.
Further, in FIG. 5 (b), as shown in FIG. 1, it is made independent for each row of the air chambers 20 by performing thermal welding on the partition portion 15 indicated by a thick vertical line. Can do. Thereby, even if this packing member 10 is cut longitudinally along the cutting line AA ′ shown in FIG. 1, air does not leak from the air chamber 20 filled with air. Therefore, the packaging member 10 of the present invention can be used as a packaging member that can absorb impacts and the like by injecting air after any portion is cut vertically and set freely even if continuously produced. To do.

Moreover, in the manufacturing method of the packaging member 10 of this invention, each plastic film 31, 32, by the metal mold | die of the heat welding which has several rows of the introduction path 23 and the air chamber 20 shown to Fig.5 (a), (b). 33 can be continuously welded by heat welding. For example, the first and third plastic films 31 and 33 are continuously heat-welded with a mold, conveyed onto the second plastic film 32, overlapped, and further heat-welded to continuously produce. . As a result, the packaging member 10 can be easily produced without providing a check valve.
In addition, as shown in FIG. 2, the inlet 11 formed between the first plastic film 31 and the third plastic film 33 has a width of the uppermost film and the first plastic film. A space is formed between the first plastic film 31 and the third plastic film 33 so that air can be easily injected, and air such as a straw can be easily injected.
Here, the manufacturing method of the packaging member 10 with three plastic films is shown, but the manufacturing method with four plastic films is the same. First, a portion to be the blowing port 24 is previously formed with a plurality of thin blades using the third and fourth plastic films 33 and 34, and a release agent is printed and applied thereon, and then the first, It is sandwiched between the second plastic films 31 and 32, and is performed in the same manner as the manufacturing method of the packaging member 10 using the three plastic films described above.

The plastic films 31 , 32 , 33 , and 34 constituting the packaging member 10 are obtained by laminating a film having heat sealing properties such as polyethylene and polypropylene and a film such as polyamide, fluororesin, and silicon. The reason why a heat-sealable material appears on one side of the plastic film is that the inner surfaces need to be thermally welded together in order to make the packaging member 10 body. Moreover, the plastic film which comprises the packing member 10 of this invention is good also as a structure which laminates | stacks the film which has heat-sealing property, such as polyethylene and a polypropylene, on both surfaces on both sides of films, such as polyamide, a fluororesin, and silicon | silicone. .

DESCRIPTION OF SYMBOLS 10 Packing member 11 Inlet 12 1st connection path 13 1st connection port 14 2nd connection path 15 Partition part 20 Air chamber 21 Air storage part 22 2nd connection port 23 Introduction path 24 Blowing port 30 Plastic film 31 First plastic film 32 Second plastic film 33 Third plastic film 34 Fourth plastic film

JP 2000-128246 A JP 2002-104520 A JP 2004-182332 A

Claims (6)

In a gas storage method in which a plastic film is superposed and heat-welded and the gas is stored in an air chamber that stores the gas inside.
Three plastic films with heat sealability,
A slit is cut in a flexible plastic film inside, and three sheets are thermally welded simultaneously to form an air chamber,
The air chamber is filled with gas from the slit, and with the pressure of the filled gas, the plastic film inside is closely attached to one of the two outer plastic films, and the filled gas leaks to the outside. A gas storage method characterized by not allowing it to occur. The gas storage method according to claim 1,
An introductory path for introducing gas is formed by the plastic film having flexibility therein and any one of the two outer plastic films. The gas storage method according to claim 2,
A gas storage method, wherein a release agent is applied to the introduction path for introducing the gas. In a gas storage method in which a plastic film is superposed and heat-welded and the gas is stored in an air chamber that stores the gas inside.
4 plastic films with heat sealability,
A slit is cut in two flexible plastic films inside, and four are heat-sealed simultaneously to form an air chamber,
The air chamber is filled with gas from the slit, and the pressure of the filled gas is used to bring the two plastic films inside into close contact with one of the two outer plastic films, and the filled gas Gas storage method characterized by not leaking to the outside. The gas storage method according to claim 4,
A gas storage method, characterized in that an introduction path for introducing gas is formed by the two plastic films having flexibility therein. In the gas storage method according to claim 5,
A gas storage method, wherein a release agent is applied to the introduction path for introducing the gas.

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