JP2556844Y2 - Food packaging bag with window - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a food packaging bag with a window that allows food to be packaged with heat insulation and allows the contents to be visually recognized from the outside.

[0002]

2. Description of the Related Art Conventionally, when eating food such as a hamburger or a hot dock, after heating in a microwave oven or oven, wrap it in a packaging bag for a while until eating, and take it home or home. May be eaten.

[0003] Such a packaging sheet provided for a food packaging bag has a laminated structure of a plurality of sheet materials, and is formed so as to suppress the cooling of the food and prevent dew condensation on the surface of the food. Have been. (For example, see Japanese Utility Model Laid-Open No. 4-97068)

[0004]

[Problem to be solved by the invention] However,
In a food packaging bag formed of a packaging sheet, since the sheet material having a heat retaining function is opaque, the packaging material becomes an opaque packaging bag, and it is not possible to visually recognize the contents while the packaging bag is sealed. The present invention has been made in order to solve the above-mentioned problem, and has as its object to provide a food packaging bag with a window which has a heat retaining property and a moisture absorbing property and allows the contents to be visually recognized from the outside. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a food packaging bag with a window according to the first invention comprises two layers of a nonwoven fabric layer and a pulp layer. Using a sheet, a band-shaped space portion is provided by facing the edge of one of the multilayer sheets and the edge of the other multilayer sheet at an interval, and is provided outside the pulp layer side of the two multilayer sheets. A transparent film is adhered through a number of partial adhesive portions to close the band-shaped space and form a band-shaped window, and a number of air layers are formed between the pulp layer and the transparent film, and A food packaging bag with a window, wherein a bag body is formed with the nonwoven fabric layer side of the multilayer sheet inside.

In the food packaging bag with a window of the second invention, the exterior sheet is adhered to the outside of the multilayer sheet composed of the nonwoven fabric layer and the pulp layer on the pulp layer side through a number of partial adhesive portions. A multilayer sheet having a large number of air layers is formed between the pulp layer and the exterior sheet, and a band-shaped space is provided by causing one edge and the other edge of the multilayer sheet to face each other at an interval. A window formed by bonding a transparent film to the multilayer sheet to cover the strip-shaped space to form a strip-shaped window, and forming a bag body with the nonwoven fabric side of the multilayer sheet inside. Food packaging bag with attached.

[0007]

This invention is constructed as described above, and the heated food stored in the food packaging bag with a window is sealed off from the outside air by closing the opening of the bag, and a large number of foods are sealed. , The heat release is suppressed.

[0008] The water vapor released from the food passes through the nonwoven fabric layer and accumulates in the pulp layer to prevent dew condensation on the food surface. Then, the entire packaged food can be visually recognized from the outside through the band-shaped window in a sealed state.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a food packaging bag with a window according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a band-shaped window.

In FIG. 1, A is a food packaging bag with a window (hereinafter, referred to as a food packaging bag).
The packaging bag A is a multilayer sheet 1 composed of a nonwoven fabric layer 11 and a pulp layer 12, respectively.
0, 10, the strip-shaped space 1 is provided between the edges 10a, 10b of both, and the pulp layer 12,
A transparent film 15 is adhered to the outer side of the side 12 to form a band-shaped window 8 in the band-shaped space 1, and a number of air layers 18 and 19 are formed between the multilayer sheets 10 and 10 and the transparent film 15. The nonwoven fabric layers 11 and 11 of the multilayer sheets 10 and 10 are formed as a bag body with the inside thereof being inside.

Each of the multilayer sheets 10 has a nonwoven fabric layer 11
And the pulp layer 12, and one surface of both is heat-welded and integrally bonded. The nonwoven fabric layer 11 is made of a melt-blown nonwoven fabric of polyethylene and polypropylene superpolar fibers in the embodiment, and has a basis weight of 5 to 8 g / m ^2.
The pulp layer 12 has a basis weight of 13 to
Water absorbing paper of about 40 g / m ² is suitable.

The multi-layer sheets 10, 10 are placed such that the respective pulp layers 12, 12 are on the outside and the edges 10
A strip-shaped space portion 1 with a predetermined interval H is provided between a and 10b, and a transparent film 15 is bonded to the outside of the pulp layer 12.

The transparent film 15 has a thickness of 20 to 40 μm.
m, in this example, a 25 μm polyethylene terephthalate film, and is bonded to the pulp layers 12, 12 at a number of partial bonding portions 17 via a bonding film 16.

The transparent film 15 covers the band-shaped space 1 to form a band-shaped window 8, and a portion between the pulp layer 12 and the bonding film 16 around the partial bonding portion 17.
An air layer 18 is formed, and an air layer 19 is formed between the transparent film 15 and the adhesive film 16. In addition,
The bonding film 16 is made of a light-transmitting polyethylene film and has a thickness of about 10 μm.
In addition, the partial bonding portion 17 is formed as a geometric pattern or a repetitive pattern such as a mark or a character, and the air layer portion 18,
19 is formed symmetrically on the front and back.

FIG. 3 is a conceptual diagram showing an example of a manufacturing process of a sheet-like material having the above-mentioned band-shaped window portion 8. In this manufacturing process, a supply roll 31 for the multilayer sheet 10 and a supply roll 32 for the multilayer sheet 10 are disposed substantially coaxially on one side, and a supply roll 33 for the transparent film 15 is disposed on the other side. A press roll 34 and a cooling roll 36 are provided at an intermediate portion thereof, and an extruder 37 for extruding the adhesive film 16 is disposed above a press-contact portion of the press roll 34.

The multilayer sheets 10 of the supply rolls 31, 32,
10 is fed out while maintaining a predetermined interval H forming the strip-shaped space portion 1, and is guided to the press-contact portion between the press roll 34 and the cooling roll 36 together with the transparent film 15 fed out from the supply roll 33.

The press roll 34 is provided with an adhesive projection 35 for forming the partial adhesive portion 17. The multilayer sheets 10, 10 and the transparent film 15 are extruded by an extruder 37.
The bonding protrusions 3 via the bonding film 16 extruded from
5, the adhesive film 16 is cured, and the partial adhesive portion 17 is formed. The non-pressed portions of the bonding projections 35 form the air layers 18 and 19.

The multilayer sheets 10 and 10 and the transparent sheet 1 that are integrated by the
The sheet material S made of 5 is wound on a winding roll 38. The air layers 18 and 19 similar to those described above can be formed even when the bonding protrusions 35 are protruded from the surface of the cooling roll 36 and the press roll 34 has a smooth cylindrical surface.

FIG. 1 shows a sheet-like material S with a band-like window.
As shown in (1), a bag is formed to form a packaging bag A. The bag is formed by arranging a band-like window 8 in the center of the front side and in the vertical direction, with the nonwoven fabric layers 11 and 11 sides of the multilayer sheets 10 and 10 on the inside and the left and right folds 2 and 3 on the back side. , And the bottom surface is sealed by the bottom seal portion 6 to form the packaging bag A having the upper opening 9.

The packaging bag A thus configured is used, for example, for packaging heated food. The heated food is stored in the packaging bag A, and the opening 9 is sealed with a clip or the like and temporarily stored. At this time, the food is surrounded by a number of air layers 18 and 19,
At the same time, the food is shielded from the outside air to suppress heat release.
In addition, the water vapor generated from the food passes through the nonwoven fabric layer 11 and penetrates into the pulp layer 12 and accumulates in the pulp layer 12 or is retained in the air layer 18 to prevent dew condensation on the food surface. Then, in the sealed state, from the bottom of the packaging bag A,
The type, size, and the like of the food stored in the packaging bag A can be checked through the band-shaped window 8 extending to the opening 9.

FIGS. 4 and 5 show another embodiment of the present invention, which is characterized by the structure of the multilayer sheet and the band-shaped window.
In the following description, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In the second embodiment, a multilayer sheet 20 is used, and one side edge 20
a and the other edge 20b are opposed to each other to form a band-shaped space portion 1 and a transparent film 15 is adhered to the outer side of the exterior sheet 23 side of the multilayer sheet 20 to form a band-shaped window portion 8 in the band-shaped space portion 1. And is formed as a bag.

The multilayer sheet 20 is formed by bonding an exterior sheet 23 to the outside of the multilayer sheet 10 composed of the nonwoven fabric layer 11 and the pulp layer 12 on the pulp layer 12 side.
The exterior sheet 23 has a basis weight of about 15 to 40 g / m ² ,
In the embodiment, the pulp layer 12 is made of an imitation paper having a basis weight of 20 g / m ² , and is bonded to the pulp layer 12 at a number of partial bonding portions 17 via the bonding film 24.

Then, in the vicinity of the partial bonding portion 17,
An air layer 18 is formed between the pulp layer 12 and the adhesive film 24, and an air layer 19 is formed between the exterior sheet 23 and the adhesive film 24. The adhesive film 24
Is formed of a polyethylene film which is extruded from the same extruder as the bonding film 16 and then cooled and cured, and has a thickness of about 10 μm.

The transparent film 15 is made of a band-shaped polyethylene terephthalate film wider than the width of the band-shaped space portion 1, and is linearly formed on both sides 20 a and 20 b of the band-shaped space portion 1 via an adhesive film 16. Extending window bonding part 2
In 7, it is adhered to the exterior sheet 23.

As a result, the multilayer sheet 20 is formed into a tubular shape with the transparent film 15 interposed therebetween, and the tubular product is formed with a bottom seal portion 6 as shown in FIG. A bag B is formed. This packaging bag B can be formed into a bag by one multi-layer sheet 20, and at the same time, wraps the heated food to form the packaging bag A of the first embodiment.
The same operation and effect as described above can be obtained.

It should be noted that the present invention is not limited to the above description and examples of the drawings, and the embodiments thereof can be changed without departing from the technical idea of the present invention. For example, the band-shaped window may be provided so as to extend horizontally. In addition, the type of bag is side seal, two-side seal,
Of course, it can take any form such as a three-way seal.

[0029]

[Effect of the invention] The food packaging bag with a window according to the invention has the above-described configuration, and the packaged food is
Since it is surrounded by the air layer and shielded from the outside air, it suppresses heat release of non-packaged foods, has high heat retention, and absorbs water vapor generated from foods into the pulp layer to prevent condensation on the food surface. Can be prevented.

Further, since the entire contents of the packaged food can be visually recognized in a sealed state by the band-shaped window portion, it is possible to temporarily store the food,
This has the effect of facilitating handling when carrying the device.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a food packaging bag with a window according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a belt-shaped window.

FIG. 3 is a conceptual diagram of a manufacturing process of a sheet-shaped material having a band-shaped window.

FIG. 4 is a perspective view of a food packaging bag with a window according to a second embodiment.

FIG. 5 is an enlarged cross-sectional view of the band-shaped window shown in FIG. 4;

[Explanation of symbols]

 A, B Food packaging bag with window, 1 band-shaped space portion 8 band-shaped window portion 10 multilayer sheet 11 nonwoven fabric layer 12 pulp layer 15 transparent film 18, 19 air layer portion 20 multilayer sheet 23 exterior sheet

Claims (2)

(57) [Scope of request for utility model registration] 1. A belt-like space using two multilayer sheets composed of a non-woven fabric layer and a pulp layer, wherein an edge of one multilayer sheet and an edge of the other multilayer sheet are opposed to each other at an interval. A transparent film is adhered to the outside of the two multilayer sheets on the pulp layer side via a number of partial adhesive portions to close the band-shaped space and form a band-shaped window, and the pulp layer A food packaging bag with a window, wherein a large number of air layers are formed between the multi-layer sheet and the transparent film, and a bag is formed with the nonwoven fabric layer side of the multilayer sheet inside. 2. An exterior sheet is adhered to the outside of the multilayer sheet composed of a non-woven fabric layer and a pulp layer via a plurality of partial adhesive portions on the outer side of the pulp layer side, and between the pulp layer and the exterior sheet. A multilayer sheet having a large number of air layers is formed, and a band-shaped space portion is provided with one edge and the other edge of the multilayer sheet facing each other at an interval, and a transparent film is adhered to the multilayer sheet. A food packaging bag with a window, characterized in that a band-shaped window is formed by closing the band-shaped space portion to form a bag with the nonwoven fabric side of the multilayer sheet facing inside.