JPH03240676A - Packaging structure and packaging method - Google Patents

Abstract

PURPOSE:To reduce the bulk of a heat-resistant material at the time of discard treatment, and to ensure an excellent heat-resistant effect by interposing the heat-resistant material, in which a gas is sealed into a bag with an air inlet, between a packing case and content. CONSTITUTION:A heat-resistant material 3 interposed in each surface of the inner surface of a packing case 1 and contents 2 is composed of a bag having a developable hexahedral section, and has an air inlet 31, and air is sealed into the heat-resistant material 3 from the air inlet. It is desirable that a check valve is mounted to the air inlet. A part in which a film piece 313 for the valve is held between an upper film piece 311 constituting the air inlet and a lower film piece 312, the upper film piece 311, the lower film piece 312 and both sides of the film piece 313 for the valve are fused, the front end (f) of the film piece 313 for the valve is fused to the upper film piece 311, the rear end (g) of the film piece 313 for said valve is fused to the lower film piece 312 while leaving one part of the rear end, and an air-supply tube 314 is inserted into the non-fusing section is used as the check valve.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a packaging structure and packaging method for fresh foods such as vegetables and fish meat.

<Conventional technology> When transporting fresh foods such as vegetables and fish meat, cardboard packaging is sometimes used, but insulation is essential to maintain freshness, and conventionally, there is no space between the cardboard box and the contents. Filled with Styrofoam insulation.

However, this Styrofoam insulation material is bulky and
The amount of styrene is large, and the amount of gas generated and calorific value during incineration is also large, making it disadvantageous for disposal.

An object of the present invention is to provide a packaging structure and a packaging method that can reduce the bulk of a heat insulating material at the time of disposal, use a small amount of resin for the heat insulating material, and guarantee a good heat insulating effect. be.

<Means for Solving the Problems> The packaging structure according to the present invention is characterized in that a heat insulating material made of a bag having an air supply port and filled with gas is interposed between the packaging box and the contents. It is possible to use a bag in which each piece arranged on each side of the inner surface of the packaging box is arranged in a row, and the adjacent pieces are connected to each other, and these can be assembled to form a packaging material. can. Additionally, a bag equipped with a check valve at the air supply port can be used.

The packaging method according to the present invention is characterized in that the above-mentioned bag is placed in a packaging box, the contents are placed therein, the bag is filled with gas, and then the contents are placed therein.

<Explanation of Examples> Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1A is a cross-sectional explanatory diagram showing one embodiment of the present invention;
Figure B is a sectional view taken along line bb in Figure 1A. Figure 1A
Further, in FIG. 1B, 1 is a packaging box, and 62, which is usually a cardboard box, is the contents, such as fresh foods such as vegetables and fish meat. Reference numeral 3 denotes a heat insulating material interposed between each surface of the inner surface of the packaging box and the contents, which is made of a bag having a large expandable surface, and is equipped with an air supply port 31 through which air is sealed. It is.

As shown in Fig. 2, two plastic films having large surface parts 3a to 3f are stacked on top of each other in the bag, and the peripheral part 30 is sealed by heat fusion, and between each of the six pieces 3a, . . . , 3f. It is possible to use a material that is heat-sealed along the horizontal line 33 while leaving the communicating portion 32. Nonwoven fabric can also be bonded to the plastic film as a reinforcing material. If the width of the heat-sealing margin between each of the six-sided pieces is widened, when air is inserted between the packaging box and the contents, there will be a gap between the pieces as shown in Figure 4. Surface contact can be made over a wide area 34, which is advantageous for maintaining heat insulation at the corners of the packaging box. The six-sided pieces may be connected straightly without being heat-sealed at all. In addition, as shown in Figure 3, the bag is made of two overlapping plastic films with large surfaces.
It is also possible to use a bag in which the periphery is fused and the two films of each piece are heat-sealed in the form of a base lattice, leaving areas where the holes communicate with each other, and FIG. 5 shows such a bag 3 wrapped. It shows a packaging structure in which a heat insulating layer is formed by interposing air between a box 1 and contents 2 and sealing air through an air supply port of the bag. As shown in FIG. 6, it is also possible to form a heat insulating layer by making the packaging box 1 double, interposing the bag 3 described above between them, and filling the bag with air through an air supply port.

In addition, the bag 3 consisting of six pieces on each side is assembled into a set,
This can also be used as it is by packaging the contents. In this case, in addition to bonding a reinforcing material to the plastic film constituting the bag 3, it is preferable to provide a light-shielding layer by bonding metal foil to the film or by metal vapor deposition. In addition, when assembling the packaging material from the bag 3 in this way, for example, adhesive tape or simple fasteners may be applied in advance to the case, course, and surge portions of each side (A to C) shown in FIG. The assembled packaging material can be sealed.

It is desirable to provide a check valve in the air supply port of the bag. As this check valve, for example, FIG. 7A showing the cross section of the air supply port 31 in FIG.
As shown in FIG. 7B, which shows a cross section, and FIG. 7C, which also shows a CC cross section, the upper film piece 311 that constitutes the air supply port
A valve film piece 313 is placed between the lower film piece 312 and the lower film piece 312.
Sandwich the upper film piece 311 and the lower film piece 312.
and the valve film piece 313 are fused on both sides, and the front end f of the valve film piece 313 is fused to the upper film piece 311.
It is possible to use one in which the rear end g of the valve film piece 313 is fused to the lower film piece 312, leaving a part, and an air supply tube (for example, a straw) 314 is inserted into the unfused part.

To seal in air, compressed air is sent in through the air supply tube, and after this air supply tube is removed, the unfused portion of the valve film piece is pushed downward by the lip action due to the sealing internal pressure. It adheres closely to the film piece, resulting in so-called self-sealing. To exhaust air from the air-filled bag, an air supply tube may be inserted into the non-fused portion.

In order to package using the packaging method of the present invention, first, the above-mentioned bag is placed inside the packaging box without air being sealed in, then the contents are placed inside the packaging box, and then the gap between the lid of the packaging box and the lid are closed. Pull out the air supply port of the bag from the semi-closed state to ensure a gap, and fill the bag with compressed air from the air supply port to inflate the bag. Then, close the lid completely and attach adhesive paper tape.
This completes the packaging.

In this case, it is desirable to temporarily fix the bag with an adhesive (for example, double-sided adhesive tape) to prevent the bag from shifting during storage of the contents. In addition, a small hole is provided in the lid of the packaging box, the air supply port of the bag is pulled out from this small hole, the lid is sealed with adhesive tape, and compressed air is then introduced through the air supply port. After that, the air supply port may be pushed into the packaging box through the small hole, and this small hole may be sealed with adhesive paper tape or the like.

In the above embodiment, air is sealed in the bag after filling the bag with the contents, but it is also possible to fill the bag with air before putting the contents in. In this case, when putting the contents into the packaging box, The impact can be buffered with an air-filled bag. In the present invention, instead of air, a gas that inflates the bag by reacting with impact or the like may be used.

<Effects of the Invention> The packaging structure according to the present invention has the configuration as described above,
Since the insulation material is a bag with an air supply port filled with air, the air can be removed and folded into a compact size when disposing of the insulation material after disassembling the package or before use as an insulation material. Easy to disassemble, dispose of insulation material, and store. Furthermore, since the amount of resin in the film constituting the bag is small, it is easy to incinerate. In addition, the six pieces of the bag are connected to each other, and air can be filled in or deaerated from the entire insulation material by operating one air supply port.Furthermore, the air supply port is equipped with a check valve. Because of this, the air inlet can be sealed without letting the sealed air escape, making it easy to fill in and deaerate air from the heat insulating material. Furthermore, deaeration can be performed by inserting a tube such as a straw into the air supply port, and there is no need to tear the bag, and a film with high tensile strength can be used for the bag, so it can be easily degassed during transportation. It is extremely safe.

The packaging method according to the present invention has the configuration as described above,
In the method of filling the bag with air after filling the contents, the air pressure can be easily adjusted according to the contents, and in the method of filling the bag with air and then filling the bag with the contents, the air pressure can be easily adjusted according to the contents. It can absorb the impact that the contents receive when they are placed into a packaging box using a chute or the like.

[Brief explanation of drawings]

FIG. 1A is an explanatory diagram showing one embodiment of the packaging structure according to the present invention, FIG. 1B is a cross-sectional view taken along line bb in FIG. 1A, and FIGS. 2 and 3 are used in the present invention. An explanatory diagram showing a bag, FIG. 4, and FIG. 6 are explanatory diagrams showing another embodiment of the packaging structure according to the present invention, respectively, and FIG. Figure 7B and Figure 7C
are a bb sectional view and a cc sectional view in FIG. 7A, respectively.
FIG. DESCRIPTION OF SYMBOLS 1... Packaging box, 2... Contents, 3... Bag (insulating material), 3a-3f... Piece, 31... Air supply port. Figure 1A Figure 1β

Claims (1)

[Scope of Claims] (1) A packaging structure characterized in that a heat insulating material made by filling a bag with an air supply port with gas is interposed between the packaging box and the contents. (2) Claim (1) is characterized in that a bag is used in which each bag piece arranged on each surface of the inner surface of the packaging box is arranged in series, and adjacent pieces are communicated with each other. packaging structure. (3) The packaging material is assembled from a bag in which each six-sided piece is connected and adjacent pieces are connected to each other,
A packaging structure characterized by packaging the contents. (4) The packaging structure according to any of claims (1) to (3), characterized in that a check valve is provided at the air supply port of the bag. (5) A packaging method comprising placing the bag according to any one of claims (1) to (4) inside a packaging box, filling the bag with gas, and then storing the contents therein. (6) A packaging method comprising placing the bag according to any one of claims (1) to (4) inside a packaging box, filling the bag with contents, and then filling the bag with gas.