JP2017024803A - Packaging container for microwave oven cooking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a convenient and safe packaging container for microwave oven cooking, capable of surely forming a steam blowing port by peeling a seal of a steam blowing portion with mechanical force caused by shape deformation of an instrument during cooking.SOLUTION: A packaging container for microwave oven cooking includes: a container body 2 which has a bottom surface part 2a of a prescribed size, lateral surface parts 2b-2e erected from the outer periphery of the bottom surface part, an opening 2f opening the upper end of the lateral surface part and a flange part 3 outward extended from the periphery of the opening; and a lid body 5 which covers the opening 2f and is heat-sealed to the flange part 3. The container body 2 is a molded body comprising a plastic material, and the lateral surface of the container body 2 is not formed with a recess directing to the center direction of the container body 2. The lid body 5 comprises a plastic film material, and the flange part 3 of the container body is formed with a notch 4 of a prescribed depth, put into the opening from the outer periphery, in at least one place and heat-sealed with the lid body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a microwave cooking packaging container, and more specifically, when cooking in a microwave oven, without any opening of the lid or partial peeling of the lid, it is directly put into the microwave oven for cooking. The present invention relates to a packaging container for cooking a microwave oven.

  In recent years, a wide variety of foods have been cooked in a microwave oven. These foods are packaged in a package for a microwave oven consisting of bags and containers. These packages not only can withstand the transportation and storage required for ordinary trays and packaging containers, but also can withstand the high heat generated during cooking in a microwave oven, can withstand pressure rise in the body, and can be cooked safely. It is required to have safety that can be used.

  In particular, in these packaging bodies, water contained in food is heated and evaporated during cooking in a microwave oven, and the pressure inside the body rises due to the generated vapor pressure. In the worst case, the rising pressure may cause the package to rupture and the food inside thereof to scatter, causing the inside of the cabinet to be contaminated or burned. Therefore, a safety measure for this is essential.

  Conventional safety measures include, for example, removing a part of the lid seal in advance or making a hole of a predetermined size in the lid before cooking with a microwave oven. Was released to the outside. However, such seal peeling or drilling is cumbersome, time-consuming, inadvertently, and if the prior preparation such as seal peeling is forgotten, the package may rupture and become a dangerous state.

  Therefore, for example, Patent Documents 1 and 2 below have proposed microwave cooking packaging bodies devised to solve this problem.

  The packaging container of the following Patent Document 1 is a heat seal in which a V-shaped part having a depth larger than the seal width is formed at least in one place of the heat seal part so as to have the tip part inward from the edge part. It is the structure which provided the part. The depth of the V-shaped part is in the range of 1.1 to 5 times the seal width. Due to the depth of the V-shaped part, when cooking in a microwave oven, the pressure is concentrated on the tip of the V-shaped part as the internal vapor pressure increases, and as a result, when opening from this part It has become. That is, the packaging container hermetically sealed by the sealing mold is heated, and as the moisture in the contents evaporates, the internal pressure rises, and the pressure exerts a lid peeling force on the packaging container. First, it concentrates on the tip of the V-shaped part, peeling from this part occurs, peeling progresses toward the outer edge of the heat seal part, and before the force distribution is uniformly distributed throughout the packaging container, the V shape The part is opened.

  Moreover, the package body of the following patent document 2 consists of a hooked container provided with a hook part extending outward by a predetermined length around the outer periphery of the opening, and a lid body covering the opening of the container and welded to the hook part. The package has a configuration in which a recess facing toward the center of the container is provided in at least one place on the side surface of the container, and a notch is provided in the collar portion corresponding to the recess. ing. The width of the collar portion in the cut portion is in the range of 20% to 50% of the width of the collar portion.

Japanese Unexamined Patent Publication No. 09-221177 JP 2013-147292 A

  Since the sealing area of the V-shaped part in which the steam outlet is formed is made small in the packaging container of the said patent document 1, the seal | sticker intensity | strength is weaker than another seal part. For this reason, the seal of this part may be weakened or peeled off during transportation or storage depending on the type of food (food) to be packaged, so that air or the like enters the inside of the container, or conversely from the container. May leak outside, and the packaged items may not be stored or preserved safely. Therefore, in this packaging container, the depth of the V-shaped part is set in a range of 1.1 to 5 times the seal width. However, since the setting of this range must be determined by the type of packaged item or the environment such as transportation and storage conditions, the setting becomes troublesome, and if the setting is not matched, the seal may be weakened or peeled off. is there. In this packaging container, the internal pressure first concentrates on the tip of the V-shaped part, peeling occurs from this part, and the peeling progresses toward the outer edge of the heat seal part, and is uniform throughout the entire packaging container. The V-shaped portion is opened before the force is dispersed, and the opening depends on the strength of the seal strength, and there is a problem in stability.

  Since the package of Patent Document 2 also has a width of the collar portion in the cut portion within a range of 20% or more and 50% or less of the width of the collar portion, substantially the same problem as the above packaging container is latent. . Moreover, since the notch | incision of a collar part is formed in the position corresponding to the recessed part of a container, the existing heat seal equipment cannot be utilized and heat sealing becomes troublesome.

  The present invention has been made to solve the above-described problems of the prior art, and the object of the present invention is to maintain the seal strength of the portion where the steam outlet is formed, while the portion of the portion is not heated. The seal is peeled off by mechanical force due to the shape deformation of the equipment to ensure the formation of a steam outlet, and can be put into a microwave oven as it is and cooked without pre-drilling or partial peeling of the lid. It is to provide a convenient and safe packaging container for range cooking.

In order to achieve the above object, a microwave cooking packaging container according to the present invention has a bottom surface portion of a predetermined size, a side surface erected from the outer periphery of the bottom surface portion, and an upper end of the side surface portion. A microwave oven cooker comprising: a container body having an opening; a flange extending outward from the periphery of the opening; and a lid that covers the opening and is heat sealed to the flange. For packaging containers,
The container body is a molded body made of a plastic material, and the side surface of the container body is not formed with a recess toward the center of the container body,
The lid is made of a plastic film material,
The lid is made of a plastic film material, and the flange portion of the container body is formed with at least one notch having a predetermined depth from the outer periphery toward the opening, and is heat-sealed with the lid, and heated. During cooking, the heat seal of the flange portion provided with the notch is peeled off by a mechanical force by changing the shape of the equipment to form a steam outlet.

According to the microwave cooking packaging container of this embodiment, the notch is covered with the lid almost entirely including the cut-off portion and is heat-sealed, so that this portion has a sealing strength compared to other portions. The desired strength can be maintained without lowering. Thereby, there is no fear of opening from this part at the time of transportation and storage, and the packaged food can be transported and stored satisfactorily. Moreover, since the sealing performance between the container body and the lid is well maintained during cooking in the microwave oven, the internal pressure in the container can be maintained for a certain period of time, and the food can be cooked deliciously.
Furthermore, during cooking, the seal of the flange portion provided with the notch is peeled off by mechanical force due to the shape deformation of the equipment to reliably form the steam outlet, so that the lid body is previously drilled as in the prior art, It can be cooked in the microwave as it is without peeling off.

  Further, the notch is preferably in an I shape, V shape, or U shape in plan view, and may be a half cut or a perforation cut.

  According to the microwave cooking packaging container of the present invention, the seal of the portion where the steam outlet is formed is not weakened. On the other hand, the portion of the seal is peeled off by mechanical force due to shape deformation of the equipment during cooking. Since the steam outlet is formed, it is possible to provide a convenient and safe range cooking packaging container that can be put into a microwave oven and cooked without being pre-drilled or partially peeled.

FIG. 1 is an external perspective view of a microwave cooking packaging container according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion II in FIG. FIG. 3 is an external perspective view of the microwave cooking packaging container of FIG. 4 shows a state of deformation at the time of cooking in the II part of FIG. 1 microwave cooking packaging container, FIG. 4A is before cooking, FIG. 4B is during cooking, FIG. 4C is an explanatory view when a steam outlet is formed, FIG. 4D is an explanatory diagram. 5A and 5B are diagrams showing modifications of the shape of the notch.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a microwave cooking packaging container for embodying the technical idea of the present invention, and the present invention is specified as the microwave cooking packaging container described herein. The present invention is equally applicable to other embodiments within the scope of the claims.

  With reference to FIGS. 1-4, the structure of the packaging container for microwave oven cooking which concerns on embodiment of this invention is demonstrated.

  With reference to FIG. 1, the packaging container 1 for microwave oven cooking which concerns on embodiment of this invention has the bottom face part 2a of predetermined magnitude | size, and the side parts 2b-2e erected from the outer periphery of this bottom face part, A container body 2 having an opening 2f with the upper ends of these side portions opened, and a flange portion 3 extending outward from the periphery of the opening, and covering the opening and heat-sealing the flange portion 3 And a lid 5 to be provided. The flange portion 3 is formed with a notch 4 having a predetermined depth from the outer periphery toward the opening 2 f and is heat-sealed with a lid 5.

  As described above, the container body 2 includes a bottom surface portion 2a having a predetermined size, side surface portions 2b to 2e erected at a predetermined height from the outer periphery of the bottom surface portion, and an opening portion 2f in which the upper ends of these side surface portions are opened. The molded body is composed of an elongated rectangular box-shaped body having a flange portion 3 extending a predetermined length outward from the periphery of the opening, and further having a desired space inside, and is molded from a plastic sheet. Is formed.

  This container main body 2 should just be produced with the plastic material which can be cooked with a microwave oven, and a material in particular is not restrict | limited. However, foods cooked in a microwave oven can be various foods such as semi-prepared foods, cooked frozen foods, chilled foods, or retort foods. It is indispensable to have food storage / preservation function, microwave permeability and heat resistance. In particular, a material that can withstand a temperature in the range of approximately 100 to 130 ° C. must be selected. Moreover, since the container main body 2 is sheet-sealed with the lid 5, it is preferable to select a lid material with a good heat sealability or an easily peelable. Examples of materials that satisfy these conditions include polypropylene resin, polyethylene resin, mixed resin of polypropylene resin and polyethylene resin, polyethylene terephthalate resin, polystyrene resin, and polylactic acid resin. Select these plastic materials. Used.

  The shape and size of the container body 2 are not particularly limited to those described above. For example, the container body 2 may be any shape such as a square shape, an oval shape, and a round shape. It is arbitrarily determined by.

  The wall thickness is not particularly limited, but is arbitrarily determined depending on the type and amount of food to be stored.

  Further, the shape and the width of the flange portion are not particularly limited, but must have a width that can be hermetically sealed by heat sealing. A notch 4 is formed in the flange portion 3. This notch is a notch or notch. The notch 4 is an I-shaped groove having a predetermined depth from the outer periphery of the flange portion 3 toward the opening 2f. The groove has a predetermined depth toward the opening 2f. The I-shaped notch is formed by molding or punching the container body 2, and is formed by an opening 4a formed on the outer edge of the flange portion 3, a groove portion 4b having a predetermined depth, and a root portion 4c serving as a groove bottom. (See FIG. 2). The formation of the notch 4 separates the flange portion 3 from left and right, that is, one flange piece 3a and the other flange piece 3b. The action of the notch 4 will be described later. When the flange portion provided with the notch is covered with a lid and heat-sealed, the sealability between the container body 2 and the lid 5 is maintained well, and When cooking in a microwave oven, a large steam pressure is applied to this portion, the heat seal is peeled off, and steam is released to the outside to prevent bursting (see FIG. 4). In this container body 2, the notch 4 is formed in one flange portion, but it may be formed in another flange portion, for example, an opposing flange portion. These notches are preferably formed in the flange portion on the long side. By providing the long side flange portion, the shape of the flange portion increases during cooking, and the steam outlet is reliably formed by the large shape deformation.

  The container body 2 is formed of the above-mentioned material by a known molding method such as vacuum molding, pressure molding, injection molding or the like.

  The material used for the lid 5 is made of a material that is transparent to microwaves and is made of a material that at least a portion facing the container body 2 can be heat-sealed (thermally welded) to the container body 2. If so, it may be composed of a single member or a multilayered member. For example, at least a portion facing the container body 2 includes polyester resin, polyamide resin, polyethylene resin, polyethylene terephthalate resin, polypropylene resin, polystyrene resin, polylactic acid resin, polyvinyl chloride resin, polychlorinated resin. Vinylidene resins, polycarbonate resins, and the like can be used.

  The lid 5 is heat sealed to the flange portion 3 of the container body 2. As the sealing method, a known method such as heat sealing using a mold, ultrasonic sealing, or the like is used. In the sheet seal between the container main body and the lid, the seal portion does not have a complicated shape, so that it can be easily sealed with a simple mold or the like.

  Next, with reference mainly to FIG. 3, FIG. 4, the effect of this microwave cooking packaging container is demonstrated.

  The container body 2 contains food to be cooked in a microwave oven, covers the opening 2 f with the lid 5, and heat seals to the flange 3. By this sealing, the I-shaped notch 4 is covered with the cover 5 and heat-sealed substantially entirely including the separated portion. For this reason, the flange part provided with the notch 4 can maintain substantially the same seal strength without lowering the seal strength as compared with other parts. Thereby, there is no fear of opening from this part at the time of transportation and storage, and the packaged food can be transported and stored satisfactorily.

  Next, since the hermetic seal between the container body 2 and the lid 5 is well maintained during cooking in the microwave oven, the internal pressure in the container can be maintained for a certain period of time, and the food can be cooked deliciously.

  When a packaging container is placed in the microwave oven and cooking is started, the water contained in the food is heated and evaporated, and the container expands as the internal pressure increases. In the state where the container is placed on the inner floor of the microwave oven, first, the lid 5 bulges upward, and the flange portion 3 provided with the notch 4 follows the bulge. 4c is supported and lifted upward so that the angle gradually increases, and at the same time, the portion provided with the notch 4 enters the inside and approaches the other flange portion facing to close the portion. (See FIG. 3). As a result of this constriction, the edges of the opposing flange pieces 3a, 3b separated by the notch 4 collide with each other and collide with each other, and when the flange portion 3 is lifted, either of the opposing flange pieces 3a, 3b moves up and down. Overlap each other. Due to the shape deformation of the flange portion, the seal of this portion is gradually peeled from the opening 4a of the notch inlet toward the root portion 4c, and this peeling reaches the notch root portion 4c, and this peeled portion The seal strength decreases and the sealing function starts to be lost. At this time, a part of the seal at the notch base portion 4c remains without being peeled, but the seal area of the remaining seal portion is reduced, and the seal strength is lower than that of the other seal portions. In this state, when the internal pressure of the container further rises, the flange portion 3 is further lifted. As a result, the root portion 4c of the notch is twisted, and the seal is peeled off due to this twisting to form a steam outlet.

  This blow-out opening is a flange portion provided with a notch 4 corresponding to the lifting of the flange portion 3, and the peeling phenomenon of the seal first starts near the opening 4a and reaches the root portion 4c via the groove portion 4b. Since it is formed by being peeled off by twisting 4c, a blowout port can be formed reliably. On the other hand, at the time of cooking, the steam at this part can be peeled off by mechanical force due to the shape deformation of the equipment to form a steam outlet. It is an object of the present invention to provide a convenient and safe range cooking packaging container that can be cooked by heating. This peeling of the lid is ensured because it is peeled by utilizing the shape change that occurs as the internal pressure of the container increases.

  From the above, this microwave cooking packaging container does not need to be touched in any way without previously drilling a hole in the lid or partially removing the lid from the container body as in the prior art. Therefore, it is possible to provide a cooking container for microwave oven cooking that is convenient, safe, and inexpensive. On the other hand, at the time of cooking, the seal at this portion is peeled off by a mechanical force due to the shape deformation of the equipment to reliably form the steam outlet, so that it is convenient and safe.

  In the microwave cooking packaging container 1 according to the embodiment, the shape of the notch 4 is an I-shape, but instead of this shape, a V-shape, a U-shape, or the like, as shown in FIG. 5A. May have other shapes such as those having a half cut portion 4d and those having a perforated cut portion 4e as shown in FIG. 5B.

DESCRIPTION OF SYMBOLS 1 Microwave cooking packaging container 2 Container body 2a Bottom face part 2b-2e Side face part 2f Opening part 3 Flange part 3a, 3b Flange piece 4 Notch 4a Notch opening part 4b Notch groove part 4c Notch root part 4d Notch half cut part 4e Notch sewing machine Eye cut part 5 Lid

Claims (3)

A bottom surface portion having a predetermined size, a side surface portion erected from the outer periphery of the bottom surface portion, an opening portion having an open upper end of the side surface portion, and a flange extending outward from the periphery of the opening portion A microwave oven cooking packaging container comprising: a container body having a portion; and a lid that covers the opening and is heat sealed to the flange portion.
The container body is a molded body made of a plastic material, and the side surface of the container body is not formed with a recess toward the center of the container body,
The lid is made of a plastic film material,
The flange portion of the container body is formed with at least one notch having a predetermined depth from the outer periphery toward the opening and is heat-sealed with the lid, and the flange provided with the notch during cooking. The microwave cooking packaging container, wherein the heat seal of the part is peeled off by a mechanical force by changing the shape of the equipment to form a steam outlet.   The microwave oven cooking packaging container according to claim 1, wherein the notch has an I shape, a V shape, or a U shape in plan view.   The packaging container for microwave oven cooking according to claim 1, wherein the notch is a half cut or a perforation cut.

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