JP2002225955A - Pouch to be heated in microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch to be heated in a microwave oven wherein a manufacturing cost including a peelable material or the like is not raised, additional manufacturing management for peelability or the like is not necessary, and an opening for discharging steam can be reliably formed without need of a tool such as scissors. SOLUTION: Two front and rear side face sheets 10 of a composite film whose innermost layer is made of a sealant layer are brought into contact with each other on their sealant layers. Side rim seals 12 and an upper rim seal 16 are formed on both side rims and an upper rim. The sealant layers on a lower rim are sealed with each other or a bottom face sheet 18 having approximately the same structure as that of the side face sheet is sealed with the sealant layer to provide a bottom rim seal, thereby constituting the pouch 1 to be heated in a microwave oven. A steam discharging notch V1 and a contents take-out notch V2, a narrow steam discharging opening forming portion comprising a half cut groove 16a extending from tips of the notches and a wide contents take-out opening forming portion are provided in the vicinity of the upper rim of the side face sheets 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouch for heating a microwave oven which can heat contents of a food or the like in a packaging bag in which the contents of the food or the like are packed in a packaging bag for filling the food or the like. And a microwave oven heating pouch provided with a steam vent opening forming part and a content taking-out opening forming part.

[0002]

2. Description of the Related Art Conventionally, when a food or the like is heated in a microwave oven in a sealed packaging bag, the bag is broken with scissors or the like in order to prevent the bag from being broken by steam vaporized by the heating and scattering. There was a pouch for heating a microwave oven by cutting off a part of it and opening it to release steam.

[0003] However, the above-described method of forming the steam vent opening by cutting involves the inconvenience of requiring a tool for cutting such as scissors. Fairness 4-299
As disclosed in Japanese Patent Publication No. 78, a microwave oven in which a part coat layer having a releasable property such as a silicone release agent is applied to the inner surface of the seal portion to be opened at the upper edge, and sealed through the part coat layer There is a food packaging bag, and as disclosed in JP-A-8-253272,
There is a package in which the sealing portion to be opened at the upper edge is sealed through a tape-like interlayer easily peelable material having an easily peelable layer, and one or more cuts are provided in a direction perpendicular to this tape. The seal portion to be opened is peeled off by the steam pressure generated by the heating of the microwave oven to form a steam vent opening portion so as to be opened.

[0004]

However, in any of the prior arts having the seal portion to be opened via the peelable material, scissors or the like are not required, but the peelable part coat layer and the tape-like interlayer can be easily removed. It is very difficult to control the release properties of each layer separately, and it is very difficult to control the release properties of each layer.For example, during transportation or storage or during retort sterilization, careless peeling or unnecessary There has been a problem that the film is not peeled off when heated in a microwave oven when necessary, that is, there is a problem that the formation of the vapor vent opening is lacking in certainty.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a pouch for heating a microwave oven (soft packaging bag) capable of heating contents such as foods in a microwave oven as it is. In), the production cost including the material cost of the peelable material is not increased, and no special production control regarding the peelability and the like is required, and no tool for cutting such as scissors is required when heating in the microwave oven. An object of the present invention is to provide a pouch for heating a microwave oven, which can reliably form a steam vent opening.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object in the present invention, first, in the invention of claim 1, at least the innermost layer is a sealant layer, and the front and back two sheets are formed of a square composite film. The sealant layer surfaces of the side sheets are brought into contact with each other, the side edges and the upper edge thereof are sealed, and the sealant layer surfaces at the lower edge of the side sheet made of the composite film or the sealant layer surface have substantially the same configuration as the side sheet. In a pouch for heating a microwave oven with a bottom sheet sealed, a notch for removing steam and a notch for taking out contents, and a continuous or discontinuous half-cut groove extending from the tip thereof are provided near the upper edge of the side sheet. A microwave heating pow comprising a narrow steam vent opening forming portion and a wide content taking-out opening forming portion. It is obtained by the.

According to the first aspect of the present invention, near the upper edge of the side sheet, a notch for removing steam and a notch for removing contents, and a narrow width formed by a continuous or discontinuous half-cut groove extending from the leading end thereof. The steam vent opening opening and the wide content take-out opening forming portion are provided. Can be reliably formed to form a narrow steam vent opening by heating, and after heating and cooking, it is torn by hand along the half-cut groove from the notch for taking out the contents to ensure that the wide contents are taken out A pouch for heating a microwave oven from which an opening can be formed to take out the contents can be obtained. As described above, according to the present invention, since no releasable material or the like is used, the production cost does not increase, and the production control related to the releasability is not required, and it is possible to reliably remove steam and take out the contents. It can be a pouch for microwave heating.

In the invention according to claim 2, the half-cut groove has a depth that does not penetrate at least the sealant layer constituting the composite film. It was done.

According to the second aspect of the present invention, the depth of the half-cut groove is set so as not to penetrate the sealant layer, thereby leaking or breaking the contents, particularly, breaking the bag due to the internal heating pressure in a microwave oven. And the like.

[0010]

Embodiments of the present invention will be described below. As shown in the perspective view of FIG. 1, the present invention relates to a pouch for microwave oven heating (1) capable of heating contents such as foods in a microwave oven without wrapping, and in particular, to a pouch for heating a side sheet (10). A notch (V1) for releasing steam and a half-cut groove (16)
a), a notch (V2) for taking out contents, and a half-cut groove (1) extending from the tip thereof.
6a) A pouch (1) for heating a microwave provided with an opening forming part for taking out contents.

As shown in the side sectional view of FIG. 2, the pouch (1) for heating a microwave oven according to the present invention comprises, for example, a base film (31) comprising an outer layer (32) and an intermediate layer (36).
Film (3) in which the inner surface of
3), as shown in the side sectional view of FIG. 3, the sealant layer (34) surfaces of the side sheet (10) composed of the two substantially rectangular composite sheets (30) are brought into contact with each other. As shown in FIG. 1, both side edges and an upper edge of the side sheet (10) are sealed to form a side edge seal portion (12) and an upper edge seal portion (16), and further, a lower edge of the side sheet (10). A bottom sheet (18) having substantially the same configuration as that of the side sheet is sealed on the surface of the sealant layer of the bottom seal portion (1).
In the standing-type microwave heating pouch (1) described in 4), the upper edge seal portion (16) of the side sheet (10) forms a substantially inverted right-angled triangle whose left edge is a vertical side. The vertices (17) of the non-seal portion (17) of the right triangle with respect to the upper edge seal portion (16) of the right triangle.
a) A notch for vapor release (V1) and a tip of the notch (17) of the non-seal portion (17) are extended to the side edge seal portion (12) near the lower portion so as to cut a lower portion of the notch (17).
b) a continuous half-cut groove (16a) is engraved,
A notch (V2) for taking out contents and a non-seal portion (17) extending from a tip of the notch (V2) below the vertical edge of the upper edge seal portion (16) of the substantially inverted right triangle so as to cut the non-seal portion (17) horizontally. A continuous half-cut groove (16a) is engraved up to the side edge facing the side.

The use of the standing type pouch (1) for heating a microwave oven shown in FIG. 1 is performed by first engraving by hand the side edge seal portion (12) near the apex (17a) of the non-seal portion (17). The steam vent notch (V1) is cut along the continuous half-cut groove (16a) to form a steam vent opening (not shown). Put it upright on a dish in a microwave and cook it. Pressurized steam generated by this heating is smoothly discharged from the steam vent opening, and the cooking can be completed without breaking the bag. After this cooking is completed, the microwave heating pouch (1)
Is taken out and cut by hand along a half-cut groove (16a) extending horizontally from a notch (V2) for extracting contents, which is engraved on a side edge of the upper edge sealing portion (16). (Not shown), and the cooked contents are taken out to another container or the like.

As another embodiment of the pouch for microwave oven heating (1) of the present invention, as shown in the front view of FIG.
For example, both side edges and an upper edge of two front and back side sheets (10) made of a rectangular composite film are sealed to form a side edge seal portion (12) and an upper edge seal portion (16). 10) A standing-type microwave heating pouch (1) in which a bottom sheet (18) having substantially the same configuration as the side sheet is sealed on the lower edge sealant layer surface to form a bottom edge seal portion (14). A narrow non-seal portion (17b) protruding inside the left edge and a wide non-seal portion (17c) are formed on the right side of the upper edge seal portion (16) of the side sheet (10). (12) The notch for steam release (V1) and the narrow non-seal portion (17b) and the wide non-seal portion (17
The pouch (1) for heating a microwave oven may be provided with a continuous half-cut groove (16a) extending so as to cut c) horizontally. The notch (not shown) for removing contents in the case of the pouch (1) for heating a microwave oven of this embodiment is also used as the notch (V1) for removing steam, but the right side edge sealing portion (12) Then, it may be provided at the end of the continuous half-cut groove (16a).

The use of the standing type pouch (1) for heating a microwave oven shown in FIG. 4 is performed by first using a steam vent notch (V) engraved on the left side edge seal portion (12) by hand.
1) The narrow non-seal portion (17b) is cut along the more continuous half-cut groove (16a) so as to cut the narrow non-seal portion (17b) to form a steam vent opening (not shown). It is placed on a microwave oven dish so that it is on top, and placed and cooked. Pressurized steam generated by this heating can smoothly pass through the steam vent opening, and the cooking can be completed without breaking the bag. After the completion of the heating, the microwave heating pouch (1) is taken out from the microwave oven, and is manually cut into the half-cut groove (16a) extending so as to horizontally cut the wide non-sealing portion (17c) from the cut portion. Along with this, an opening (not shown) for taking out the contents is formed, and the contents cooked by heating are taken out to another container or the like. When the notch (not shown) for taking out the contents is provided in the right side edge seal portion (12) as described above, the opening for taking out the contents can be formed by tearing off the notch.

Further, as another embodiment of the pouch (1) for heating a microwave oven of the present invention, as shown in the front view of FIG. 5, for example, two side sheets (10) made of a rectangular composite film. The both side edges and the upper edge of the side sheet are sealed to form a side edge seal portion (12) and an upper edge seal portion (16), and the lower edge of the side sheet (10) has substantially the same structure as the side sheet. In the standing-type microwave heating pouch (1) in which the bottom sheet (18) made of is sealed to form a bottom edge sealing portion (14), it protrudes from one end of the upper edge of the side sheet (10). A nozzle (19) consisting of a tapered non-seal portion (17d);
The other end has a wide non-seal portion (17c), and the side edge of the tapered nozzle (19) has a notch (V
1) and a continuous half-cut groove (16a) extending from its tip to cut the tapered non-seal portion (17d), and is formed in the side edge seal portion (12) facing the tapered nozzle (19). A microwave heating pouch (1) in which a notch (V2) for removing contents and a continuous half-cut groove (16a) extending so as to horizontally cut the wide non-seal portion (17c) from the end thereof are engraved. It can also be.

The use of the standing-type microwave heating pouch (1) shown in FIG. 5 is performed by first using a continuous steam vent notch (V1) engraved by hand on the side edge of the tapered nozzle (19). The tapered non-seal portion (17d) is cut along the half-cut groove (16a) so as to cut the non-seal portion (17d) to form a steam vent opening (not shown). It is placed on a microwave oven, placed on a plate, and cooked. Pressurized steam generated by this heating can smoothly pass through the steam vent opening, and the cooking can be completed without breaking the bag. After the completion of the heating, the microwave heating pouch (1) is taken out of the microwave oven, and the right side edge seal portion (1) is manually drawn.
From the notch (V2) for taking out the contents engraved in 2)
The wide non-seal portion (17c) is cut along the half-cut groove (16a) extending so as to cut horizontally to form an opening (not shown) for taking out the content, and the cooked content is cut into another portion. It is intended to be taken out to a container or the like.

The pouch (1) for heating a microwave oven in the above case is a standing type (called a standing pouch) in which a bottom sheet (18) is sealed to form a bottom edge sealing portion (14). For example, a pouch of a four-sided seal type in which sealant layers at the lower edge of the side sheet made of the composite film are sealed. In the case of this four-sided seal type pouch, it cannot be erected on the dish of the microwave oven.

Further, the half-cut groove (16a) is formed as shown in FIG.
As shown in the figure, the depth is such that it does not penetrate at least the sealant layer (34) constituting the composite film (30), and the front and back side sheets (10) are engraved with the front and back register in register. Either side sheet (1
0). Further, the form may be continuous or discontinuous like perforations.

The engraving of the half-cut groove (16a)
A rotary cutter or the like may be used, but engraving with a carbon dioxide laser is preferable. It is excellent in linearity of each opening compared to processing with a cutter, etc., and it is easy to make it continuous or discontinuous depending on laser oscillation conditions, lamination conditions of the composite film (30), etc., and control of its depth. The innermost layer of the sealant layer (34).
It is easy to provide a pouch (1) for heating a microwave oven without causing leakage of contents without penetrating through.

The materials and the like of the pouch for heating a microwave oven will be described below. As the composite film (30) constituting the pouch (1) for heating a microwave oven of the present invention, a single-layer film having heat sealability may be used, but generally, as shown in the cross-sectional side view in FIG. Base film (3
This substrate film (31) is composed of 1) and an innermost sealant layer (34). The base film (31) has various functions such as gas barrier properties and light shielding properties between the outer layer (32) requiring surface strength and the like. Intermediate layer (36) is laminated,
Examples of the outer layer (32) include a biaxially stretched nylon film (ONy), a polyethylene terephthalate film (PET), and a polycarbonate film (PC), which are appropriately selected depending on the contents to be stored and the use of the bag. .

The innermost sealant layer (34) may be a heat-sealing linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE) film or an unstretched polypropylene film. (CPP) and the like,
The sealant layers (32) made of these resins are heat-sealed to form a microwave heating pouch (1) having a seal portion on the periphery.

Further, between the outer layer (32) and the sealant layer (34), for example, an ethylene / vinyl alcohol copolymer resin film (EVOH) having excellent gas barrier properties, aluminum oxide or oxide Depending on the purpose, a ceramic-deposited film on which silicon or the like is deposited or an aluminum foil is laminated via an adhesive or the like, or a biaxially stretched nylon film is laminated for the purpose of bending pinhole resistance. A composite film (30) consisting of four layers can be used.

[0023]

As described above, the present invention has the following effects. That is, at least the innermost layer is a sealant layer, the sealant layer surfaces of the front and back two side sheets made of a square composite film are brought into contact with each other, and both side edges and the upper edge are sealed, and the side sheet made of the composite film In a pouch for heating a microwave oven in which a bottom sheet having substantially the same configuration as the side sheet is sealed on the sealant layer surface at the lower edge or on the sealant layer surface, a steam vent notch and contents are provided near the upper edge of the side sheet. Since it is provided with a notch for taking out the material, a narrow steam vent opening forming portion formed of a continuous or discontinuous half-cut groove extending from the tip thereof, and a wide content taking opening forming portion, it is possible to use a microwave oven. When cooking, it is possible to easily and reliably form a narrow steam vent opening without using scissors or the like. It can after cooking, the microwave heating pouch that can be taken out the contents easily and reliably by forming the contents extraction opening of the wide torn by hand to. As described above, according to the present invention, since a peelable material or the like is not used for forming the vapor vent opening as in the related art, the production cost is not increased, and the production management related to the peelability is not required. A pouch for heating a microwave oven that can reliably release steam and take out contents can be obtained.

According to the present invention, the depth of the half-cut groove is set so as not to penetrate the sealant layer of the composite film. It can be a pouch for heating a microwave oven without breakage.

Therefore, the present invention exhibits an excellent practical effect as a microwave heating pouch capable of heating contents such as foods in a microwave as it is packed.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an embodiment of a pouch for heating a microwave oven according to the present invention.

FIG. 2 is an explanatory view showing an example of a composite film constituting a pouch for heating a microwave oven according to the present invention in a side cross section.

FIG. 3 is an explanatory view showing an embodiment of the vicinity of the upper edge seal portion of the pouch for microwave oven heating according to the present invention in a side cross section.

FIG. 4 is a front view for explaining another embodiment of the microwave heating pouch of the present invention.

FIG. 5 is a front view for explaining another embodiment of the pouch for heating a microwave oven according to the present invention.

[Explanation of symbols]

 1 Pouch for microwave oven heating 10 Side sheet 12 Side seal section 14 Bottom edge seal section 16 Upper edge seal section 16a Half cut groove 17 Non-seal section 17a Outline Non-seal portion vertex of right triangle 17b {Narrow non-seal portion 17c} Wide non-seal portion 17d {Tapered non-seal portion 18} Bottom sheet 19 #Tapered nozzle 30 {Composite film 31} ‥ Base film 32 ‥‥ Outer layer 34 ‥‥ Sealant layer 36 ‥‥ Intermediate layer V1 ‥‥ Notch for removing steam V2 ‥‥ Notch for removing contents

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E064 AB23 BA22 BB03 BC01 BC18 FA01 GA04 HE02 HF09 HG03 HG07 HM01 HN05 HP01 3E086 AA23 AB03 AC07 AC15 AC40 AD01 BA04 BA15 CA01

Claims (2)

[Claims] At least the innermost layer is a sealant layer,
The sealant layer surfaces of the front and back two side sheets made of a rectangular composite film are brought into contact with each other, the both side edges and the upper edge thereof are sealed, and the sealant layer surface at the lower edge of the side sheet made of the composite film or the sealant layer surface In a microwave heating pouch in which a bottom sheet having substantially the same configuration as the side sheet is sealed, in the vicinity of the upper edge of the side sheet, a notch for removing steam and a notch for taking out the contents, and a tip thereof. A pouch for heating a microwave oven, comprising: a narrow steam vent opening forming portion formed by continuous or discontinuous half-cut grooves extending; and a wide content extracting opening forming portion. 2. The pouch for heating a microwave oven according to claim 1, wherein said half-cut groove has a depth not penetrating at least a sealant layer constituting said composite film.