JP2525847Y2 - Product packaging - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a package body for wrapping a product.

More specifically, the number of packaging bags used for the package is 2
The present invention relates to a package having a double-layered structure, which has a function of preventing a stored product from being damaged by an external force for a certain period of time or a function of preventing deterioration of quality due to temperature or oxygen by sealing a gas therebetween.

[Prior Art] Conventionally, a plastic bag has been used for a cushion.

Also, various product packaging bags made of plastic film are widely used.

However, a package using these packaging bags has drawbacks that the film is thin, so that it has no buffering action, no heat insulation function, and low gas barrier properties.

[Problem to be Solved by the Invention] The present invention aims to provide a package without the above-mentioned disadvantages.

[Means for Solving the Problems] The present inventor pays attention to the fact that a cushion effect, a heat insulating effect and a gas barrier effect can be obtained by injecting a gas between double plastic films, and this is used as a package. The present invention was completed by utilizing it.

That is, the present invention consists of the following items.

1. A double-layer structure of a plastic film rectangular inner bag formed by fusing side edges and a plastic film rectangular outer bag formed by fusing side edges wider than the inner bag, The inner bag and the outer bag are fusion-fixed at the opening edge of the outer bag, and the upper edge of one side of the outer bag is used as the gas injection passage 10 and the upper edge of the other side of the outer bag is fused and cut off. Items in the heat-sealed inner bag of the double-structured packaging bag in which the gas press-fit passage is heat-sealed with the outer bag inflated by the gas pressure pressed between the inner bag and the outer bag. A product package characterized by storing therein.

2. It has a double structure of a plastic film rectangular inner bag formed by fusing side edges and a plastic film rectangular outer bag formed by fusing side edges wider than the inner bag, The inner bag and the outer bag are horizontally fixed by a fusion line below the opening edge of the outer bag and the opening edge of the inner bag, and are vertically fused above the end 8 of the fusion line 3 on one side of the outer bag. A gas injection passage is formed in the upper part of one side of the outer bag by providing a wiring 13, and the upper part on the other side of the outer bag is cut off by a cut-off fusion line 14 extending from the fusion line 3. In the heat-sealed inner bag of the double-structured packing bag, the gas press-in passage is heat-sealed with the outer bag expanded by the gas pressure pressed between the inner bag and the outer bag of the structure. A product package characterized in that an article is stored in the package.

(3) The product package according to the above (1) or (2), wherein the inner bag and the outer bag are fixedly fused at a lower edge.

(4) The plastic film of the inner bag and / or the outer bag is a laminated film in which the outer layer is a polyolefin-based resin film and the inner layer contains a gas barrier film.
Item (2) or (3).

5 The items are put in the inner bag, the heat-treated inner bag is sealed, and then gas is press-fitted between the inner bag and the outer bag to form the items (1), (2), and (3). )) Or the product package according to (4).

(6) The product package according to the above (1), (2), (3), (4) or (5), wherein a silver color is applied to the inner surface or the outer surface of the outer bag.

The configuration and operation of the product package of the present invention will be described in more detail with reference to examples.

As shown in FIGS. 1 and 2, one embodiment of a packaging bag (hereinafter referred to as a packaging bag of the present invention) used for a package according to the present invention includes an inner bag 2 having a slightly smaller width inside a wider outer bag 1. Both of these bags are formed by fusing two films on the front and back sides of the bag body and by fusing the side edges thereof. And the outer bag 1 are fixed. The fusion line 3 also exists on the back side, and the inner bag 2
And the outer bag 1 are fixed. Since the fusion wire 3 does not reach the inside of the inner bag 2, the opening of the inner bag 2 is completely opened.

The opening 21 of the inner bag 2 projects above the upper edge 11 of the outer bag 1. With this structure, when manufacturing a package,
This is convenient when only the inner bag 2 is sealed with a heat seal, for example, when finally only the opening of the inner bag 2 is heat sealed.

In the packaging bag of the present invention, the projecting structure of the opening 21 of the inner bag 2 is unnecessary depending on the method of manufacturing the package.

In the packaging bag of the present embodiment, the outer bag 1 and the inner bag 2 are formed by the gas press-fitting passage 10 formed by the fusion line end 8 where the front and back fusion lines 3 approach and the upper film of the outer bag. Gas can be blown.

The other open end of the outer bag 1 is provided with a cut-off fusion line 9 extending from the side edge of the outer bag to the side edge of the inner bag, which cuts off the space between the outside and the two bags and blows gas. Is to prevent the outflow.

As one use method of the packaging bag of the present embodiment, first, gas is blown from the gas injection passage 10 to inflate the outer bag 1.
Next, the lower part of the gas press-fitting passage 10 is pressed and held down along the edge of the opening, and the upper part is heat-sealed to seal the gas in the space between the outer bag 1 and the inner bag 2.

At this time, the film on the front and back of the inner bag 2 is in close contact. For example, when fresh fish or the like is pushed into the inner bag 2 together with ice blocks and the inner bag opening 21 at the upper edge of the inner bag 2 is heat-sealed, the package of the present invention in which fresh fish is put can be manufactured.

In this case, the heat seal is desirably a wide heat seal as shown in FIG. For example, heat sealing by high frequency or ultrasonic waves is also suitable.

In the present invention, when the inner bag 2 is sealed, in addition to the heat sealing, the inner bag 2 can be fixed while maintaining watertightness by a clip or the like in which the end is fixed by two hinged bars.

As shown in FIG. 3, since the package of the present invention wraps the outside of the inner bag 2 with air, the speed of heat transfer is reduced, the melting of ice blocks is slowed, and the fresh fish can be kept at a low temperature.

In the case of this embodiment, the upper part is hung and the inner bag 2
However, it is desirable to prevent heat from coming into contact with the outer bag 1 because there is no heat transfer and the heat insulating effect is obtained.

If an oxygen gas barrier film is used as the plastic film used in the packaging bag of the present embodiment, it is possible to prevent deterioration of the food due to oxygen when the food is put. The oxygen gas barrier function of the packaging bag of the present invention can also be used for food applications requiring a heat insulating function.

Examples of the oxygen gas barrier film include a saponified ethylene-vinyl acetate copolymer resin, a polyvinylidene chloride resin, and a metal film. When used in the present invention, in order to provide heat sealing properties and water resistance, a multilayer film having a polyolefin resin film on the outside and a laminate of three or more layers including a gas barrier film in one of the inner layers is used. Is desirable.

Furthermore, in order to provide oxygen gas barrier properties, it is desirable to use an inert gas, for example, a carbon dioxide gas or a nitrogen gas, as the gas to be sealed outside the inner bag 2. In particular, when a gas barrier film is used for the outer bag 1, it is necessary to use an inert gas.

In the case of carbon dioxide gas, there is an advantage that a method of heat sealing while evaporating the carbon dioxide gas after adding a certain amount of solid dry ice can be selected.

The weak pressure of the enclosed inert gas increases the oxygen gas barrier property of the film of the outer bag 1, and the oxygen concentration of the atmosphere in the outer bag 1 in contact with the inner bag 2 is much higher than in the atmosphere. Since it is low, permeation of oxygen into the inner bag 2 is significantly reduced.

When the inner or outer surface of the outer bag 1 of the present invention is made silver,
The radiation can be reflected to further improve the heat insulating effect. As the silver film, for example, it is preferable to use a laminated film including a metal film such as an aluminum foil in an inner layer or a film in which metal is vapor-deposited on the outer surface, since the film also functions as a gas barrier.

The package of the present invention is mainly used for take-out in the case of heat insulation for food, but has the advantage that a long-term freshness retaining effect can be obtained in terms of gas barrier properties even when stored in a refrigerator as it is. .

In addition, food is put in the inner bag of the double packaging bag of the present invention, heat sterilized by a conventional method, and an inert gas is injected between the outer bag 1 and the inner bag to have an oxygen gas barrier property. A package can be made.

An embodiment of another aspect of the present invention is shown in FIG.
The packaging bag of this embodiment differs from the packaging bag of FIG. 1 in that the lower edge of the inner bag 2 and the lower edge of the outer bag 1 are fused and fixed by the lower edge fusion portion 12 and the inner bag 2 Is different in that the opening of the outer bag 1 does not protrude from the upper edge of the outer bag 1.

4 and 5, a vertical fusion line 13 is provided at the upper right of the outer bag 1 from the right end of the fusion line 3 to form a gas press-in passage 10. The outlet at the left end of FIG.

As an example of using this packaging bag, a product is put into the inner bag 2 of this packaging bag, and first, the outer bag 1 is passed through the gas injection passage 10.
The gas is pressurized between the inner bag 2 and the inner bag 2 with slightly increased pressure. At this time, the inner bag 2 is pressed against the product by the external pressure, and closely adheres to the shape of the product.

In this state, the upper edge of the packaging bag is pressed with the edge of the high-frequency seal, heat-sealed, and the outer bag 1 and the inner bag 2 are pressed together at the same time, as in the embodiment of FIG. Seal.

In this way, for example, if a card-type calculator is wrapped, the lower edge of the inner bag 2 is fixed, so that the inner bag 2 is suspended in the center of the expanded outer bag 1 as shown in FIG. A retained package is created.

In this case, there are gas cushions on both sides of the calculator. For example, even if the package is folded down, the calculator does not directly hit the table, so that a buffering effect can be obtained.

In the package shown in FIG. 6, the fact that the inner bag 2 is less likely to come into contact with the outer bag 1 due to the gas cushion action is described in FIG.
As in the case of the figure, it is advantageous in terms of the heat insulating effect and the gas barrier effect, and it is more desirable to use the package of the embodiment of FIG. 6 for this purpose.

When the transparent film is used for the outer and inner bags of the packaging bag of the present invention, the items inside can be seen.

Usually, the package having the heat insulating or cushioning effect is opaque, but the packaging bag of the present invention can provide a transparent package.

[Effects of the Invention] A package having a double wall structure using the package of the present invention has an advantage that the size and shape can be selected according to the purpose, and has an advantage of having a heat insulating function, a gas barrier function, and a buffer function. It is useful as a package for take-out food or as a package for preventing food deterioration or impact-resistant packaging of goods in the distribution process.

For example, a durable film sheet can be used to make a bag for home delivery, or water and oxygen can be blown into the inner bag to carry live fish.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an embodiment of the packaging bag of the present invention, and FIG.
FIG. 3 is a longitudinal sectional view of the packaging bag, FIG. 3 is a longitudinal sectional view of the packaging bag packaged with the packaging bag, FIG. 4 is a plan view of another embodiment of the packaging bag of the present invention, and FIG. Is a longitudinal sectional view thereof,
FIG. 6 is a longitudinal sectional view of the packaging bag packaged by the packaging bag. 1; outer bag, 2; inner bag, 3; fusion line, 4; outer bag side edge, 5; inner bag side edge, 6; outer bag bottom, 7; inner bag bottom, 8; Fusion wire end,
9, 14; interruption fusion line, 10; gas press-in passage, 11; upper edge of outer bag, 1
2; lower edge fusion part; 13; vertical fusion line; 15; crimp sealing surface; 16; product; 21; inner bag opening.

Claims (6)

(57) [Scope of request for utility model registration] 1. A plastic film rectangular inner bag formed by fusing side edges and a plastic film rectangular outer bag formed by fusing side edges wider than the inner bag. The inner bag and the outer bag are fusion-fixed at the opening edge of the outer bag, and the upper edge of one side of the outer bag is used as the gas press-in passage 10, and the upper edge of the other side of the outer bag is fusion-sealed. A heat-sealed inner bag of a double-structured packaging bag in which the gas press-in passage is heat-sealed in a state where the outer bag is inflated by gas pressure press-fitted between the inner bag and the outer bag having a double structure. A product package comprising an article stored therein. 2. A plastic film rectangular inner bag formed by fusing side edges and a plastic film rectangular outer bag formed by fusing side edges wider than the inner bag. It consists of a structure, the inner bag and the outer bag are fixed horizontally by the fusion line below the opening edge of the outer bag and the opening edge of the inner bag,
A vertical fusion line 13 is provided above the end 8 of the fusion line 3 on the upper side of one side of the outer bag, and a gas press-in passage is formed on the upper side of the one side of the outer bag. The upper portion of the outer bag is inflated by the gas pressure inserted between the inner bag and the outer bag having a double structure in which the upper portion of the outer bag is cut off by a cut-off fusion line 14 extending from the fusion line 3. Articles of merchandise characterized in that articles are stored in a heat-sealed inner bag of a double-structured packing bag whose passage is heat-sealed. 3. The product package according to claim 1, wherein the inner bag and the outer bag are fixedly fused at a lower edge. 4. The product package according to claim 1, wherein the plastic film of the inner bag and / or the outer bag is a laminated film whose outer layer is a polyolefin resin film and whose inner layer contains a gas barrier film. 5. The method according to claim 1, wherein an article is put in the inner bag, the heat-treated inner bag is sealed, and then gas is press-fitted between the inner bag and the outer bag. Product packaging. 6. The product package according to claim 1, wherein the inner or outer surface of the outer bag is colored silver.