JP2002080073A - Automatic hole-making bag for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems with a conventional automatic hole-making bag for a microwave oven that the bag is time-consuming for a customer and a method of use is possibly mistaken, and the seal strength is weak and the bag can be broken when the bag is made of an easy-open film though the bag is formed in a method for sealing preliminarily opened vent holes by a tape and peeling the tape when the bag is heated in the microwave oven, a method for devising the seal shape by using the easy-open film or a method for forming a portion of weak seal strength, etc. SOLUTION: In a gusset type bag product using a heat-seal type OP easy to peel the seal on a surface layer of a plastic laminate film, small holes for vent are made in a folding part of the gusset, both ends of the gusset are sealed to constitute a gusset shape with sealed small holes. When the bag in a sealed condition is placed in the microwave oven, breakage of the bag can be prevented even when the steam pressure is generated in the bag.

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 gusset-shaped bag-making product using a heat-sealing type OP which is easily peeled off from the surface of a plastic laminated film, wherein the gusset has a small hole for ventilation at a folded portion thereof. Both ends are sealed to form a gusset with sealed small holes, and the pressure and pressure of the steam generated in the bag is applied from the inside of the bag by the above film structure and form, and the steam pressure acts stronger than the sealing strength between the surface layers. At this point, the seal is peeled off, and the steam is allowed to escape from the previously opened ventilation holes. It is characterized in that it is configured to prevent a bag.

According to the second aspect of the present invention, the sealant material 1A3 is laminated on the lower surface of the substrate 1A1 via an adhesive 1A2, and the heat seal OP1A5 is laminated on the upper surface of the substrate 1A1 via an adhesive 1A4. A gusset part 1D is formed in the bag cylinder part 1C obtained by applying the back paste seal 1B in a state where the sealant materials are heat-sealed with the raw material film 1A, and the gusset part 1C is formed.
A small hole 1E for ventilation is opened in the folded part 1D1 of D,
An outer heat seal 1F is applied to the outer portion 1D2 on the inner surface of the gusset portion 1D to seal the small holes 1E for ventilation,
It is characterized in that a bottom seal 1G is applied to the bag cylinder 1C.

The operation is as follows. 1. If the contents are placed 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. Due to the pressure, the outer sealing portion in the gusset portion is peeled off, and the small holes for ventilation are exposed to release the water vapor.

[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. A sealant material 1A3 is laminated on the lower surface of the base material 1A1 via an adhesive 1A2, and the heat seal OP is formed on the upper surface of the base material 1A1 via an adhesive 1A4.
A gusset portion 1D is formed in the bag cylinder 1C obtained by applying the back paste seal 1B in a state where the sealant materials are heat-sealed with the raw material film 1A on which 1A5 is laminated, A small hole 1E for ventilation is opened in the folded portion 1D1 of the gusset portion 1D, and an outer heat seal 1F is applied to an outer portion 1D2 on the inner surface of the gusset portion 1D to seal the small hole 1E for ventilation, and to form a bag. A bottom seal 1G is provided on the cylindrical portion 1C. In addition, 1H is a head seal applied after storing the contents.

[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 in a microwave oven with the bag unopened. 2. Even if the bag is heated in an unopened state, the bag does not break, so that no unpleasant explosive sound is generated. That is, when the bag is inflated during heating in the microwave oven, the seal on the bag surface is peeled off in the direction of the vapor pressure applied to the gusset, and the small holes for ventilation are exposed and deaerated. 3. 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. 4. By making it a gusset, you can adjust the height of the small holes for ventilation by changing the dimensions of the gusset part,
Even a certain amount of liquid can be heated. That is, when the contents are liquid, liquid leakage occurs at the time of opening the flat bag, but since the gusset bag is configured to have a height, the liquid leakage can be reliably prevented. 5. Can withstand vacuum packaging and frozen packaging. 6. 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 view of a main part of a back pasting seal portion in the above.

FIG. 4 is an enlarged view of a main part mainly showing a gusset part in FIG. 2;

FIG. 5 is a cross-sectional view illustrating an operation.

FIG. 6 is a cross-sectional view illustrating an operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic opening bag for microwave ovens 1A1 Base material 1A2 Adhesive 1A3 Sealant material 1A4 Adhesive 1A5 Heat seal OP 1B Back sticker 1C Bag cylinder 1D Gazette part 1D1 Folding part 1E Small hole for ventilation 1F Heat seal 1G Bottom sticker

Claims (2)

[Claims] 1. A gusset type bag-making product using a heat seal type OP which is easy to peel off from the surface layer of a plastic laminated film, the gusset has a small hole for ventilation at a folded portion, and has both ends of the gusset. At the time when the pressure of the steam generated in the bag by the above film configuration and form is applied from the inside of the bag, and the steam pressure is stronger than the sealing strength between the surface layers, it is configured in a gusset form in which the small hole is sealed by sealing. , By peeling off the seal and allowing the vapor to escape from the previously opened ventilation holes, if the bag is heated in a microwave oven with the bag unopened, even if steam pressure is generated inside the bag, the bag will not break. An automatic opening bag for a microwave oven, wherein the bag is configured as described above. 2. An adhesive (1A) is attached to the lower surface of the substrate (1A1).
The raw material film (1) in which the sealant material (1A3) is laminated via 2) and the heat seal OP (1A5) is laminated on the upper surface of the base material (1A1) via the adhesive (1A4)
A), the bag cylinder (1) obtained by applying a back-sticker (1B) in a state where the sealants are heat-sealed to each other.
C), the gusset part (1) is attached to the bag cylinder part (1C).
D) is formed, and the gusset portion (1D) is folded (1D).
In 1), a small hole (1E) for ventilation is opened, and an outer heat seal (1F) is applied to an outer portion (1D2) on the inner surface of the gusset portion (1D) to form a small hole (1E) for ventilation. An automatic opening bag for a microwave oven, wherein the bag is sealed and a bottom seal (1G) is provided on a bag cylinder (1C).