JPH09124081A - Heat insulation bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a portable heat-insulation bag which has heat retaining properties, is not bulky, and is easy to carry, by joining a mat-like sealed sheet, comprising two or more synthetic resin films superimposed one on top of the other, into a bag, by filling air into it, and then by rolling up and fixing the upper part of the bag after putting in stuff to be stored. SOLUTION: An air back-flow prevention valve 5 is sandwiched in the air filling opening of two or more films 1, and parts 3 and 2 shown by full lines are sealed while an air inflow space 4 is kept. Next, it is folded into two along central line AA', both its ends are sealed, and then handle parts are sealed and fixed. And, from the air filling opening, air is sealed in, thereby forming a three-dimensional bag whose foot parts project as in the form of fish gills. Then, stuff to be stored is put into the three-dimensionally formed bag, and the parts which are not filled with air are pushed and bent inside to close the upper part of the bag, then rolled up, pressed and firmly fixed. Thus, because the inside of the three-dimensional bag is closed, it functions as a bag having heat retaining properties.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag for daily use, and more particularly to a portable heat retaining bag.

[0002]

2. Description of the Related Art Heretofore, as a heat insulating material suitable for carrying of this kind, a box-shaped one such as a cooler box made of synthetic resin (see, for example, Japanese Patent Application No. 5-264433), cloth, and A bag-shaped product in which two layers of material coated with resin are sandwiched between two layers of heat-insulating material and the cloth is sewn together (for example, Japanese Utility Model Application No. 5-26980).
(See Japanese Patent Laid-Open Publication No. JP-A-2003-138), or a quilting bag in which synthetic fiber cotton, natural cotton or the like is sandwiched between the cloths, quilted, and then sewn into a bag shape.

[0003]

When a box-type cooler box is transported without putting the contents in it, not only is it inconvenient for the bulky person to carry it, but in that case, even dislike may be felt. Further, the heat insulating bag and the quilting bag made of cloth have a slightly lower heat insulating property as compared with the box type, but they are not sufficient though they have some defects in carrying.
Moreover, both are relatively expensive, and it is difficult for frozen food companies and fresh food companies to use them as a service for customers to package products, and they also require considerable space for storage. .

The present invention is heat-retaining, convenient to carry, and, of course, general users try to solve the above-mentioned price difficulties of the traders to some extent, and further, minimize the storage space. Is what you are trying to do.

[0005]

In order to achieve the above object, the heat insulating bag according to the present invention has two or more synthetic resin films superposed on each other, and the periphery and the inside thereof are adhered to each other to form a bag. This is achieved by enclosing air in the film gap.

The synthetic resin film is a thin sheet made of polyethylene, polypropylene, polyester, polyamide, polyvinyl acetate, polyvinyl chloride, polyacryl or the like.
(Hereinafter, referred to as a film) It is more effective that the film is colored rather than transparent, and further, a laminate of aluminum foil or the like or a coat of the same kind of powder mixed with a resin material is coated.

Two or more of these films are superposed on each other and an air inlet is provided at one end, and an air backflow prevention valve is sandwiched between the portions. For two or more films, only the part set to have a shape having an air inflow space is bonded. After being filled with air, the portion has the shape of a commercially available air mat. The bonding method is fusion bonding by heat,
It is possible to use general synthetic resin adhesives for films.

The laminated films are folded from the center and both ends are formed into a bag shape by the above method. In this state, the bag is in the form of one sheet, and a three-dimensional bag is formed by enclosing air from the air injection section described above.

[0009] From the top of this three-dimensional bag, put the desired storage items, and in the case of cold storage, at the same time put ice or a cold insulating material (ice non, etc.), and then close the top for cold storage. Becomes In addition, the stored object intended to keep warm can be kept warm for a long time by closing the upper part as it is.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the adhesive shape of the film of the present invention (hereinafter,
It is a front view which shows (it calls a seal). At the air inlet of two or more films (1), the air check valve (5) (hereinafter,
(Referred to as a valve), and having an air inflow space (4), a portion (3) indicated by a solid line is sealed.
However, the solid line on the outside of the film does not always need to be sealed. 2 is a front view of a valve used in the present invention, and FIG. 3 is a sectional view thereof. This valve (5) is sealed and fixed to the body film as shown in FIG.

FIG. 5 shows a lateral partial cross-sectional shape after air sealing when two films are stacked. FIG. 6 is a lateral partial sectional view of the same state when three films are stacked. FIG. 7 shows the same four sheets stacked, and FIG. 8 is a cross-sectional view showing the state of the outer seal when four sheets of film are stacked. The number of film seals is 1 when 2 sheets are stacked, 2 when 3 sheets are stacked, and 3 when 4 sheets are stacked.
Times. The valve has 2 layers of film and 1 layer of 3 layers.
Two pieces are required to stack four pieces. The valve used here is a seat type, but a tube type valve can sufficiently exhibit its function.

FIG. 9 is a double-folded product taken along the center line AA 'in FIG. 1. After sealing the portion (8), the handbag (9) is seal-fixed (10) to form a sheet-like bag. Next, when air is filled through the air inlet (5), both hem portions of the bag project like a gills, forming a three-dimensional bag as shown in FIG. The portion (12) in FIG. 10 is not filled with air and can be freely bent.
3) is a part where an adhesive material is applied and a release paper is attached to the surface, or one side of the double-sided adhesive tape is peeled off and attached.

The desired storage material is put into a three-dimensional bag, and if necessary, ice or a cold storage material is put in the bag, and FIG.
When the (a) and (b) parts of (3) are pressed and bent inward, the upper portion of the three-dimensional bag is closed as shown in FIG. Then (12)
By winding the part, peeling off the release paper of the adhesive part (13), and pressing and fixing the rolled up part (12) to the part (13), the three-dimensional bag is closed inside and has a heat retaining property as shown in FIG. Becomes (Hereinafter, this three-dimensional bag containing air is called a heat retaining bag.)

FIG. 12 is a front view when the present invention is used, and FIG.
Is a side view when the present invention is used, and FIG. 14 is a left and right side view when the same is used. FIG. 15 is a cross-sectional view of the heat-insulating bag produced by stacking two films, taken along the line BB ′ in FIG.

[0015]

Example 1 A polyethylene heat insulating bag laminated with an aluminum foil according to the present invention (size: heat insulating part vertical 10
cm, width 12 cm, height 7 cm) two films,
For comparison, a three-layered and four-layered heat-insulating bag and a conventional bag (size: 32 cm, depth: 38 cm) made of the same material were each filled with 300 g of ice, and the outside air temperature was 24 ° C.
The melting state of ice after 2 hours, 4 hours, and 4 hours is shown by the remaining amount of the added ice. Table 1 shows the results. As a result, with the conventional bag of the same material, the amount of ice remaining after 1 hour was reduced to 180 grams (60% of the time of input) and 40 grams after 4 hours (13% of the time of input), almost the appearance of ice. Disappeared. On the other hand, in the heat-insulating bag according to the present invention, the amount of remaining ice is 128 g after stacking two sheets (43% when throwing in) even after 4 hours, and 175 g when stacking three sheets (58% when throwing in). 196g for 4 layers (65 at the time of input)
%).

[0016]

[Example 2] Using a storage bag manufactured under the same conditions as in Example 1 and a conventional type bag, rice (75 ° C) steamed for 15 minutes after cooking was put as an object to be stored, and the outside air temperature was 22 ° C.
The temperature drop of the rice to be stored was measured every hour. Table 2 shows the results. With the conventional bag of the same material, the temperature of the stored item is 58 after 1 hour.
C., and after 4 hours, it fell to 24.degree. C., which is close to the temperature of the outside air. On the other hand, the heat-insulating bag according to the present invention is 68 ° C. for two layers after one hour, 70 ° C. for three layers and 71 ° C. for four layers, and the temperature of the stored object after four hours is 2 ° C. 47 ° C for stacking 3 sheets, 55 ° C for stacking 3 sheets 58 for 4 sheets
Even after 4 hours at ℃, it was in a state of feeling a sufficient warmth.

[0017]

Example 3 The color of the film used in the present invention is 2
The heat insulation performance is compared by using a heat insulation bag with a stack of sheets. a is transparent, b is blue, and c is a film laminated with an aluminum foil. As in Example 1, comparison was made with the remaining amount of ice over time. As is clear from Table 3, the aluminum foil laminate film is well kept warm, followed by blue and transparent. However, the remaining amount of ice in the heat insulating bag according to the present invention is clearly better than that in the conventional bag.

[0018]

As described above in the embodiments and examples, the heat-retaining bag according to the present invention is excellent in heat-retaining property, does not stretch, and is inexpensive because the synthetic resin film is used as the main material. It is an invention having the characteristics to say.

That is, before use, it is a foldable sheet, and the storage space is very small, and it can be folded and made portable. Therefore, the inconvenience of transportation and disgust were eliminated without the need to stretch in the empty state.

The heat retaining property is more than twice as high as that of an ordinary synthetic resin film bag, and since the bag of the present invention is filled with air, the outer wall functions as an air cushion to store the stored object. It has the feature that it also has the ability to protect from trauma.

Further, since the enclosed air can be removed from the valve after use, it can be reused even after it has been used once, and the heat-retaining bag can be folded and miniaturized for reuse. It also has an excellent feature that it can be easily managed in a very small space.

[Brief description of the drawings]

FIG. 1 is a diagram showing a shape of a seal of a laminated film of the present invention.

FIG. 2 is a front view of the seat-type valve used in the present invention.

FIG. 3 is a vertical sectional view of a seat type valve used in the present invention.

FIG. 4 is a cross-sectional view showing a state of a film and a valve when the valve is sandwiched between the laminated films of the present invention.

FIG. 5 is a lateral partial cross-sectional view of a heat insulating bag in which two films are stacked and filled with air.

FIG. 6 is a lateral partial cross-sectional view of a three-film heat-insulating bag with air filled therein.

FIG. 7 is a cross-sectional view of a lateral partial cross-section of a heat insulating bag in which four films are stacked and filled with air.

FIG. 8 is a lateral partial cross-sectional view showing a bonding state of four films after air-filling a four-layer heat insulating bag.

9 is a front view of a sheet-like bag obtained by folding in half along the center line AA ′ in FIG.

FIG. 10 is a perspective view of a three-dimensional bag obtained by enclosing air in a sheet bag.

FIG. 11 is a perspective view when the upper part is closed after the object to be stored is put into the three-dimensional bag.

FIG. 12 is a front view of a heat insulating bag according to the present invention.

FIG. 13 is a side view of a heat insulating bag according to the present invention.

FIG. 14 is a left and right side view of the heat insulating bag according to the present invention.

FIG. 15 is a BB ′ of FIG. 13 in the heat insulation bag according to the present invention.
It is sectional drawing at the time of cutting by a line.

[Explanation of symbols]

(1) Superposed film (1a) Superposed first film (1b) Superposed second film (1c) Superposed third film (1d) Superposed fourth film Film (2) Sheet-shaped bag outer seal part (3) Stacked film seal part (4) Injected air inflow space (5) Seat type valve (6) Valve inside seat type valve (7) Seat type Air inlet of valve (8) Seal part of sheet bag (9) Hand strap of bag (10) Seal fixing part of hand strap (11) When air is not enclosed and deformed into a solid bag, it is stretched like a fish gill. The part to put out (12) The part to close the upper part when air is not enclosed and it becomes a three-dimensional bag (13) The part where the adhesive material is attached

Claims (2)

[Claims] 1. A sheet produced by stacking two or more synthetic resin films, sandwiching an air backflow prevention valve between the films, and adhering the periphery and the inside to form an air mat after injecting air. After that, joined in a bag shape,
A three-dimensional bag formed after air-sealing the bag 2. A part (1) for closing and sealing the upper part of the three-dimensional bag when air is not enclosed and the bag becomes a three-dimensional bag.
2) Then, the three-dimensional airtight bag having the adhesive part (13) wound around (12) and attached to fix the part. In addition, an air-filled carrying bag equipped with a carrying strap (9).