JPH0924950A - Sandwich package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sandwich freshness holding characteristics and facilitate packaging operation by receiving sandwiches in a packaging bag made of a plastic film which has been made into a bag to receive the sandwiches and by heat-welding an opening of the bag to have it sealed. SOLUTION: A plastic film excellent in characteristics such as oxygen barrier properties or the like preferably such as polypropylene is selected as a material of the plastic film used as a sandwich packaging bag 2. Packaging with a sandwich package 1 comprises steps of first receiving sandwiches 3 inside from an opening 4 of the bag 2, then pressing an approximate center of the opening 4 from both sides in directions indicated by arrows to have only the center heat-welded, also heat-welding an entire width of the opening from directions orthogonal to the arrows, and sealing the inside of the bag with the opening 4 used as a seal 4b. Then an excessive part of the seal 4b of the opening 4 is cut from a cut line 11 to obtain the sandwich package 1. Thus the sandwiches inside the bag can be completely sealed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sandwich package in which sandwiches each having an appropriate size and shape are individually packaged in order to distribute and sell edible sandwiches.

[0002]

2. Description of the Related Art Conventionally, a so-called sandwich in which vegetables, ham, etc. are sandwiched between thin slices of bread is a convenience store.
It is widely sold in stores and grocery stores. This sandwich is cut into an appropriate shape (usually a triangle), and a plurality of sets (generally 3 to 4 sets) are put together and packaged in a bag made of a transparent plastic film, and distributed and sold in the form of a sandwich package. There is.

As shown in FIG. 5, a conventional sandwich package 51 is formed by stacking two plastic films and punching them into a vertically long trapezoidal shape, and the base side of the trapezoid is an opening, and three sides except the bottom side are heat-welded. Only the sandwich packaging bag 52 was used, the sandwich was stored in the bag through the opening of the bag 52, the film in the opening was folded back, and the portion was fixed with the adhesive tape 53 for packaging.

The bag 5 of the conventional sandwich package 51 described above.
In order to facilitate the opening of the bag, as shown in FIG. 5, a seal portion 54 at the upper side of the trapezoidal bag is usually provided.
An end portion 55 is formed on the outer side of the end portion 55, and two cuts 56a and 56b are formed in the film on one side of the end portion 55 to provide an opening section 57. Further, in the above sandwich packaging bag, a film which is uniaxially stretched in the same direction as the cut 56 is usually used so that the film is cut straight from the opening section 57.

When the above sandwich package 51 is opened, the piece 57 for opening is pulled in the extending direction of the fill so that the opening piece 57 exceeds the sealing portion 54, and the sandwich packaging bag 52 is cut in the extending direction of the film. Incidentally, when the unsealing piece 57 is pulled in the stretching direction, the sealing portion 54
In order to straightly cut the film in the stretching direction beyond the range, it is necessary to peel the film at the seal portion 4. Therefore, when the unsealing piece is provided, the seal strength of the seal portion 54 is relatively weak and heat sealing is performed.

Further, in the above conventional sandwich package, even when the opening piece is torn from the seal portion or when a bag without the opening piece is used, the bag can be opened by peeling the adhesive tape from the opening. It is possible and the sandwich inside can be taken out through the opening.

[0007]

By the way, sandwich packages are often kept in a refrigerated state during distribution and sale in order to maintain their freshness, and keeping the freshness of the sandwich means its commercial value. From the top is extremely important. However, in the conventional sandwich package, in terms of freshness preservation, the opening of the bag is simply folded back and stopped with an adhesive tape, so that the internal sealing property is insufficient, and the freshness retention is further improved. Is required.

Further, in the case of manufacturing a conventional sandwich package, the operation of folding the film at the opening of the bag and stopping it with an adhesive tape after the sandwich is stored in the bag can be automated because it is difficult to mechanize. Instead, it was done manually. Therefore, it is difficult to improve the efficiency of sandwich packaging work.

Further, in the conventional sandwich package, if the strength of the seal portion 54 on the side where the unsealing piece 57 is provided is increased, the unsealing piece 57 will be torn from the sealing portion 54, so that the sealing portion 54 will be broken. Keeps the seal strength low. Therefore, there is a problem in that the seal portion 54 may be inadvertently peeled off, and the package is not reliable in terms of sealing performance.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and it is possible to further improve the freshness-retaining property of the sandwich, the packaging work is easy, and automatic packaging is possible. An object of the present invention is to provide a sandwich package and a sandwich package excellent in both sealing property and opening property.

[0011]

According to the present invention, (1) a sandwich is stored in a sandwich packaging bag made of a plastic film formed into a shape capable of storing the sandwich, and the opening of the sandwich packaging bag is heat-welded. The present invention provides a sandwich packaging body characterized in that the inside of the bag is sealed, and (2) the sandwich packaging body according to (1), wherein the opening tape is provided on the sandwich packaging bag. .

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of an embodiment of a sandwich package of the present invention. As shown in FIG. 1, a sandwich packaging body 1 of the present invention has a sandwich packaging bag 2 made of a plastic film formed into a shape capable of storing a sandwich, in which a sandwich 3 is stored, and the opening of the sandwich packaging bag 2 is opened. 4 is heat-welded to form a seal portion 4b, and the sandwich 3 is hermetically sealed inside the bag 2.

As the sandwich packaging bag 2 used in the sandwich packaging body 1 of the present invention, a conventionally known bag used for sandwich packaging can be used. FIG. 3 is a plan view showing an example of the sandwich packaging bag of the sandwich package of the present invention. As shown in FIG. 2, for example, the sandwich packaging bag 2 is formed by stacking two plastic films 21 and 22 and fusing and sealing them into a trapezoidal shape, with the base of the trapezoid as an opening 4 and the upper side as a sealing portion 5. A bag in which three sides other than the bottom side of the trapezoid are heat-welded is used as the side portions as the seal portions 6a and 6b.

FIG. 3 shows a method for packaging a sandwich package.
It is process drawing which shows an example. As shown in FIG. 3A, first, the sandwich package 1 is packaged by storing the sandwich 3 inside from the opening 4 of the sandwich packaging bag 2 and then
By pressing the substantially central portion of the opening 4 from both sides in the arrow direction to heat-weld only the central portion, the entire width of the opening is heat-welded in the direction orthogonal to the arrow direction, as shown in FIG. As shown, the inside of the bag is sealed by using the opening 4 as the seal portion 4b. As the means for heat welding, heat sealing, impulse sealing, ultrasonic bonding, high frequency bonding or the like can be appropriately used. Then, the excess portion of the seal portion 4b of the opening 4 is cut from the cutting line 11 to obtain the sandwich package 1 as shown in FIG.

Examples of the material of the plastic film used for the sandwich packaging bag 2 include plastic films such as polypropylene, polyethylene, polyethylene terephthalate, polyvinyl chloride, etc. However, polypropylene is inexpensive and has excellent oxygen barrier properties. It is preferable because it has excellent characteristics. The thickness of the plastic film is preferably 20 to 40 μm, particularly preferably 20 to 30 μm, from the viewpoint of unsealing property and economy.

The sandwich packaging bag 2 may be made from one plastic film, but as shown in FIG.
It is preferable that the sides are sealed to form a bag. Further, as shown in FIG. 2, the sandwich packaging film 2 has an end portion 7 formed outside the seal portion 5 which is the upper side of the trapezoidal bag, and the film is formed on one side of the end portion 7. 2 notches 8
Preferably, a and 8b are provided, and the film between the cuts is formed as an opening section 9.

Further, as shown in FIG. 2, the sandwich packaging bag 2 is preferably provided with an unsealing tape 10 at a position where the trapezoidal shape of the bag is vertically divided into two. Incidentally, the opening tape 1
When 0 is provided, the cuts 8a and 8b of the end portion 7 are formed as shown in
The opening tape 10 is formed at a position between them as shown in FIG.

The opening tape 10 is usually made of a transparent or colored plastic film such as polypropylene or polyester, and is laminated on the plastic film of the bag by means of heat welding or the like so as to be located on the inner surface side of the bag. It The width of the unsealing tape 10 is preferably 2 mm to 10 mm. As shown in FIG. 2, the length of the unsealing tape 10 does not reach the end on the opening 4 side even if the length is from the upper side end to the opening side end with respect to the trapezoidal bag. The length may be any, but as shown in FIG. 2, it is preferable to provide up to the end on the opening 4 side.

When only the unsealing piece 9 is formed without providing the unsealing tape 10, the film of the bag 2 (the film on the side on which the unsealing piece is provided) is made of a material in the same direction as the cut 8. It is necessary to use uniaxially stretched film. However, when the unsealing tape 10 is provided, the film is cut along the tape, so that the unstretched film or 2
An axially stretched film can be used.

Further, the sandwich packaging bag 2 has one of the two films 21 and 22 (see, for example, FIG. 2).
Then, it is preferable that the length of the opening side of the film 22) is formed to be long to form the protruding portion 13. Generally, a sandwich is not formed into an isosceles triangular shape, but is formed into a shape in which two sides have different lengths, such as a right triangle shape. Therefore, if the two films 21 and 22 are formed to have the same length, when the sandwich is stored in the bag, the length of the two films in the opening portion is longer on the sides of the sandwich. The film on the side may become short, making it difficult to perform heat welding. On the other hand, when the protrusion 13 is formed on one of the films as in the sandwich packaging bag 2 described above, when the sandwich is stored in the bag 2, the long side of the sandwich has a protrusion 13 on the film. If it is stored so that it is on the side, the length of one film does not become extremely short, and the length of the two films in the opening can be aligned and heat welded. is there. Further, when the lengths of the two films are changed, it is preferable that the unsealing tape, the unsealing piece, and the like are provided on the shorter film.

FIG. 4 is a view for explaining an opened state of a sandwich package using a packaging bag provided with an opening tape. As shown in FIG. 4A, the sandwich package 1
In the case of unsealing, when the unsealing piece 9 at the end 7 is pulled in the direction of the arrow, the film is torn straight along the unsealing tape 10. The film torn from the unsealing section 9 does not tear or bend during cutting. In particular, there is no risk of cutting from the seal portion 5. As a result, there is no need to purposely reduce the strength of the seal portion as in the conventional case, the seal strength of the seal portion can be increased, and there is no risk of the seal portion peeling accidentally
The sealing property of the entire package can be further enhanced.

In the case of the sandwich package of the present invention, since the opening of the bag is completely sealed by heat welding,
It is not possible to remove the sandwich from the opening by peeling off the adhesive tape as in the conventional package. Therefore, by using the sandwich packaging bag 2 provided with the unsealing pieces 9 and the unsealing tape 10, it is possible to surely take out the sandwich inside the bag by using the unsealing pieces, so that the sandwich packaging bag 2 can be opened. The effect of providing the tape is great. Further, it is preferable that the unsealing tape is provided at a position where the bag is unsealed beyond the sealing portion from the viewpoint of good unsealing ability and increasing the strength of the sealing portion to maintain the hermeticity.

[0023]

As described above, in the sandwich package of the present invention, since the opening of the sandwich packaging bag is heat-welded, the conventional sandwich package in which the opening of the sandwich packaging bag is fixed with the adhesive tape. Compared with, the sandwich inside the bag is completely sealed and the freshness of fresh food such as ham and vegetables sandwiched between breads is excellent.

Further, the work of packaging the opening of the sandwich packaging bag by heat welding can be mechanized, and the work is automated and the workability of the packaging work can be improved as compared with the work of bending the opening and stopping with an adhesive tape. be able to.

In the sandwich package of the present invention, when a sandwich packaging bag provided with an opening tape is used, the plastic film is reliably torn by the opening tape, so that the film is bent and cut, or the film is cut. There are no problems such as cutting in the middle, excellent openability, and easy removal of the sandwich inside.

Furthermore, when the bag provided with the unsealing tape is used, the package can be reliably unsealed.
Unlike the conventional case, it is not necessary to reduce the sealing strength of the upper side of the trapezoidal bag, the welded portion can be reliably sealed, and the packaging reliability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment of a sandwich package of the present invention.

FIG. 2 is a plan view showing an example of a sandwich packaging bag.

FIG. 3 is a process drawing showing an example of a sandwich packaging method.

FIG. 4 is an explanatory diagram of an opened state of the sandwich package.

FIG. 5 is a perspective view showing an appearance of a conventional sandwich package.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sandwich package 2 Sandwich packaging bag 3 Sandwich 4 Opening 4b Sealing part of opening 5 Sealing part of upper side 6 (6a, 6b) Sealing part of side 7 End 8 (8a, 8b) Notch 9 Opening piece 10 Unsealing tape

Claims (2)

[Claims] 1. A sandwich packaging bag made of a plastic film formed into a shape capable of storing a sandwich, wherein the sandwich is enclosed, and the opening of the sandwich packaging bag is heat-welded to seal the inside of the bag. Characteristic sandwich package. 2. The sandwich package according to claim 1, wherein the sandwich packaging bag is provided with an opening tape.