JP2002080070A - Automatic holing bag for use in microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that in a conventional automatic holing bag for use in a microwave oven, an air hole formed beforehand is sealed with a tape, which is peeled off when the bag is heated in a microwave oven, or an easy- open-film is used to change the shape of seal or a weak seal is provided; however, these methods require much time and erroneously used by a user, and the easy-open-film is weak at its sealed portion and tends to break. SOLUTION: In the automatic hole-opening bag wherein a sealant material having perforation like holes is pasted to a portion where a non-adhesive layer is provided in a laminated plastic film, the pressure of water vapor generated in the bag is applied to the inside of the bag, and the water vapor passing through the perforation flows through the non-adhesive layer so as to be discharged from the sealed part. Thus, even if the sealed bag is put into a microwave oven and heated and water vapor is generated in the bag, the bag is not ruptured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening bag for a microwave oven having a novel structure.

[0002]

2. Description of the Related Art A conventional automatic opening bag for a microwave oven has the following configuration. 1. Seal the air holes that have been opened in advance with tape,
A method of peeling off the tape when heating in a microwave oven. 2. A method of devising the seal shape using an easy-open film or arbitrarily creating a part with low seal strength. 3. Use a breathable film. 4. A method in which a coextruded film is used and the adhesive resin layer is peeled off when heated and pressed. 5. A method in which consumers open air holes in a bag when heating in a microwave oven.

[0003]

The above-mentioned prior art has the following problems. 1. Consumers may be troubled, or there may be errors in usage due to lack of explanation. 2. In the case of the easy-open film, the sealing strength is weak, and there is a possibility that the bag is broken during transportation and storage. 3. It is necessary to create a uniform seal bar for each product. 4. The contents are limited.

[0004] The present invention has been made in view of such problems of the prior art, and has as its object to provide the following. 1. Consumers should not be troublesome. 2. The seal strength and shape must not break during transport or storage. 3. There is no need for specially shaped seal bars that match the bag size and contents. 4. The mechanism shall not limit the contents to be stored and the manufacturing method.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention is as follows. That is,
The invention according to claim 1 is a manufacturing bag in which a non-adhesive layer is partially provided in a plastic laminated film, and a sealant material having perforated vent holes is bonded to that portion. Since the ink may adhere to the contents from the vent holes of the sewing machine, a three-layer structure is used to prevent this, and the pressure of the steam generated in the bag is applied from the inside of the bag due to the above film structure and form. By configuring so that the vapor that has passed through the eye-shaped ventilation holes passes through the non-adhesive part, penetrates the seal part and deaerates,
When the bag is placed in an unopened microwave oven and heated, the bag is prevented from breaking even if a vapor pressure is generated in the bag.

According to a second aspect of the present invention, the intermediate material 1A3 is laminated on the upper surface of the base material 1A1 via the adhesive 1A2, and the sealant material 1 is laminated on the upper surface of the intermediate material 1A3 via the adhesive 1A4.
A5 is formed on the back surface film 1A on which A5 is laminated, and on the upper surface of a sealant material 1B1 in which perforated holes 1B11 are provided linearly at desired locations.
The intermediate material 1B3 is laminated via an adhesive 1B2 laminated leaving a non-adhesive surface 1B12 of a predetermined width around the center, and the base material 1B5 is laminated on the upper surface of the intermediate material 1B3 via an adhesive 1B4. After the bag front film 1B is stacked on the upper surface of the bag back film 1A, the left and right heat seals 1C and 1C and the bottom seal 1 are formed.
D is applied.

The operation is as follows. 1. If a microwave oven cooked product is put in a bag and placed in a microwave oven in a sealed state, moisture from the contents and moisture contained in the air in the bag evaporate, and the volume in the bag expands. 2. When the bag expands, water vapor pressure is applied from inside the bag, and the bag tries to escape to the outside. 3. The generated steam penetrates through the non-adhesive portion and the seal portion from the perforated vent hole and escapes outside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments with reference to the drawings. Reference numeral 1 denotes an automatic opening bag for a microwave oven according to the present invention. The intermediate material 1A3 is laminated on the upper surface of the base material 1A1 via the adhesive 1A2,
3 and a back film 1A for a bag in which a sealant material 1A5 is laminated via an adhesive 1A4 and, for example, an upper surface of a sealant material 1B1 provided with a linearly perforated ventilation hole 1B11 in the center. The intermediate material 1B3 is laminated via the adhesive 1B2 laminated leaving the non-adhesive surface 1B12 having a predetermined width around the ventilation hole 1B11, and the base material 1B5 is laminated on the upper surface of the intermediate material 1B3 via the adhesive 1B4. After the bag front film 1B is laminated on the upper surface of the bag back film 1A, left and right heat seals 1C and 1C are applied to the left and right sides, and the bottom side is formed on the lower side. A seal 1D is provided. Reference numeral 1E denotes a head seal to be applied after cooking a microwave oven.
Note that 1C1 is a portion where the sealant material is heat-sealed, but the intermediate material and the sealant material are weakly bonded.

[0009]

EXAMPLES Further, when a vacuum test was performed, good results were obtained.

[0010]

Since the present invention is configured as described above, the following effects can be obtained. 1. The cooked product for a microwave oven can be heated with the bag unopened. 2. Can withstand vacuum packaging and frozen packaging. 3. Even if the bag is heated in a microwave oven in an unopened state, the bag does not break, so that no unpleasant explosive sound is generated. 4. When heating a cooked product for a microwave oven in an unopened bag with a microwave oven, steam is released from the inside of the bag while expanding for a certain period of time, which has a steaming effect. 5. In addition, it has effects such as being inexpensive to manufacture and economical.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automatic opening bag for a microwave oven.

FIG. 2 is an enlarged sectional view taken along line AA.

FIG. 3 is an enlarged sectional view taken along line BB.

FIG. 4 is a perspective view illustrating a relationship between a bag back film and a bag front film.

FIG. 5 is an exploded perspective view of a front film for a bag.

FIG. 6 is an exploded perspective view of the bag front film.

FIG. 7 is an enlarged sectional view taken along line CC.

FIG. 8 is a perspective view illustrating an exhaust operation.

FIG. 9 is a cross-sectional view illustrating an exhaust state in the above.

FIG. 10 is an enlarged longitudinal sectional view of an essential part for explaining an operation centering on pressurization and expansion.

FIG. 11 is an enlarged vertical cross-sectional view of a main part explaining an operation centering on the peeling of an adhesive surface.

FIG. 12 is an enlarged longitudinal sectional view of an essential part for explaining an operation centering on penetration and exhaust.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Automatic opening bag for microwave oven 1A Back film for bag 1A1 Base material 1A2 Adhesive 1A3 Intermediate material 1A4 Adhesive 1A5 Sealant material 1B11 Perforated vent 1B1 Sealant material 1B2 Adhesive 1B3 Intermediate material 1B4 Adhesive 1B5 Base material 1B Front film for bag 1C Heat seal 1D Bottom seal 1E Head seal

Claims (2)

[Claims] 1. A plastic laminated film, comprising:
In a manufacturing bag in which a non-adhesive layer is partially provided and a sealant material having perforated vent holes is bonded to the part, ink may adhere to the contents from the perforated vent holes in a two-layer configuration. Therefore, in order to prevent this in a three-layer structure, the pressure of the steam generated in the bag by the above film structure and form is applied from the inside of the bag, and the steam passing through the perforated vent holes passes through the non-adhesive portion. As described above, by being configured to penetrate through the seal part and deaerate, if the bag is heated in an unopened state in a microwave oven, the bag is prevented from being broken even if steam pressure is generated in the bag. Automatic opening bag for microwave oven. 2. An adhesive (1A) is provided on the upper surface of the substrate (1A1).
The intermediate material (1A3) is laminated via 2), and the intermediate material (1A3) is laminated.
Back film (1A) for a bag in which a sealant (1A5) is laminated on the upper surface of A3) via an adhesive (1A4)
And linearly perforated vent holes (1B
On the upper surface of the sealant material (1B1) provided with 11),
An intermediate material (1B3) is laminated via an adhesive (1B2) laminated leaving a non-adhesive surface (1B12) of a predetermined width around the ventilation hole (1B11), and adheres to the upper surface of the intermediate material (1B3). A bag front film (1B) on which a base material (1B5) is laminated via an agent (1B4), and a bag front film (1B) is formed on the upper surface of the bag back film (1A).
After stacking B), heat seal left and right (1C, 1C)
And a bottom seal (1D).