JP2015155319A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging container capable of suppressing burst when cooking with an electronic oven.

SOLUTION: A packaging container 10, for packaging an object inside, includes: a box-like container body 11 composed of a rectangular bottom face 12, side faces 13-16 erected from each side of the bottom face 12, and flange parts 17-20 extended from upper end parts of the side faces 13-16; and a lid body 22 which covers the container body 11 and is attached to the flange parts 17-20. In the lid body 22, at least one row of a plurality of grooves 23 are formed along the longitudinal direction of the lid body 22 at positions corresponding to the flange parts 17 and 18 in the longitudinal sides of the container body 11.

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a packaging container for cooking an object to be packaged using a microwave oven, and more specifically, there is no need for an opening operation before heating in the microwave oven, and the steam is not formed in a special shape. The present invention relates to a packaging container that can be discharged and can prevent damage during transportation.

  In recent years, foods for microwave ovens that can be cooked in a microwave oven have been found, and packaging containers used in microwave ovens have been developed. Conventionally, when heating / cooking in a microwave oven, the packaging container may be ruptured due to water vapor generated from the food and the food may be scattered.

  For example, Patent Document 1 below discloses an invention of a food package for a microwave oven that can degas the increased internal pressure in the tray when cooking with a microwave oven. In the invention disclosed in Patent Document 1 below, the upper peripheral edge of the peripheral side wall of each tray is formed by the welding convex edge portion, the subsequent step portion and the low step edge portion, and at the outer position of each tray. A high-pressure deaeration unit is provided on the upper peripheral edge. And by providing this high pressure deaeration part, when the pressure in a tray becomes more than predetermined, it can deaerate.

  Moreover, the following patent document 2 discloses an invention of a microwave cooking packaging container that can specify an opening location. In the invention disclosed in the following Patent Document 2, a synthetic resin container having a flange portion and a lid made of a synthetic resin film are placed on the flange portion with a heat seal portion in a state where the food for cooking is filled in the container. In the microwave oven packaging container configured by heat-sealing so as to form a V-shaped portion or U-shaped portion having a depth larger than the seal width at a part of the heat-sealed portion. It is formed so as to have a tip in the direction of the center of the material. By adopting such a configuration, according to the invention disclosed in Patent Document 2 below, the tip of the V-shaped part or the U-shaped part is accompanied by an increase in the internal vapor pressure during microwave cooking. As a result, it is said that the area is surely opened from the part.

Utility Model Registration No.3052161 Japanese Unexamined Patent Publication No. 09-221177

  The high pressure deaeration part which comprises the food package for microwave ovens of the said patent document 1 is comprised by forming shapes, such as a rib, a mountain-shaped ridgeline convex part, a mountain-shaped recessed part, and a hem convex edge, on a tray. . Therefore, in order to form the configuration of the high-pressure deaeration unit, a complicated process is required or a special mold needs to be prepared, which increases the manufacturing process and increases the manufacturing cost. Further, by forming a complicated shape on the tray, the strength of the tray itself in the portion where the high-pressure degassing portion is formed may be weakened.

  Moreover, since the heat seal part which comprises the microwave cooking packaging container of the said patent document 2 also becomes a complicated shape, a special metal mold | die is needed and the cost to manufacture becomes high. Moreover, since a heat seal part becomes a complicated shape, there exists a possibility that the intensity | strength of the part which formed the V-shaped site | part or the U-shaped site | part may become low.

  As a result of various studies to solve the problems of the prior art as described above, the inventors have formed a portion for releasing vapor in a film covering the container, and a packaging container configured to affix this portion to the container; As a result, the pressure inside the container rises as it is heated by the microwave oven, and when the shape of the container changes, the part where the film is affixed gradually peels off, and the part that escapes the vapor formed on the film appears Thus, the present inventors have found that the steam in the container is discharged and have completed the present invention.

  That is, an object of the present invention is to provide a packaging container that does not require an opening operation before heating in a microwave oven and that can discharge steam without having a special structure in the container.

In order to achieve the above object, a packaging container body according to a first aspect includes a rectangular bottom surface, a side surface standing from each side of the bottom surface, and a flange portion extending from an upper end portion of the side surface. A box-shaped container body configured, a container that is covered with the container body and has a lid attached to the flange portion, and is a packaging container in which an article to be packaged is contained,
The lid body is characterized in that at least one row of a plurality of groove portions is formed along the longitudinal direction of the lid body in a corresponding portion of the flange portion on the longitudinal side of the container body.

  Further, the packaging container of the second aspect is characterized in that, in the packaging container of the first aspect, each groove of the plurality of groove portions is formed in a direction parallel to the longitudinal direction of the lid. .

  Moreover, the packaging container of the 3rd aspect is a packaging container of the 1st or 2nd aspect, The said several groove part is formed by penetration or non-penetration, or these combination.

Further, the packaging container of the fourth aspect is the packaging container of the first or second aspect, wherein the plurality of grooves are formed non-penetrating,
The lid is characterized in that the side on which the plurality of non-penetrating grooves are formed is attached to the flange.

  Further, the packaging container according to a fifth aspect is the packaging container according to any one of the first to fourth aspects, wherein the lid is attached to the container body after the plurality of grooves are formed in advance. And

  When the packaging container is heated in a microwave oven, if the pressure in the packaging container rises due to the steam generated from the package, the lid of the packaging container swells and the side surface on the long side of the container body deforms the fastest. . At this time, according to the packaging container of the first aspect, by deforming the container body, the lid portion of the portion attached to the flange portion on the long side begins to peel, and the groove portion formed in the lid body appears, The internal vapor can be released from the peeled groove. For this reason, when the packaging container is heated in the microwave, it is not necessary to open the packaging container in advance. Moreover, since a special shape is not formed in the container main body only by forming the groove portion in the lid, the manufacturing becomes inexpensive and the conventional container main body can be used. The groove portion of the lid may be formed in a plurality of rows. In addition, if the position where the plurality of grooves are formed is close to the inside of the container body, it can be opened with the internal pressure being weak, and if it is away from the inside of the container body, the internal pressure is kept high. Can be adjusted according to the item to be packaged.

  Further, according to the packaging container of the second aspect, even if a plurality of grooves are formed on the lid, it can be attached with sufficient strength to the flange, so that it can be damaged during transportation. Can be suppressed.

  Further, according to the packaging container of the third aspect, by forming a plurality of through-grooves, it is possible to easily discharge the internal pressure in the microwave oven, and to form a plurality of non-through-grooves. Thus, the lid can be attached with high strength. In addition, by combining penetration and non-penetration as a plurality of groove portions, it becomes easy to open and high strength can be obtained. In this case, it is preferable that the penetrating groove portions and the non-penetrating groove portions are formed alternately.

  Moreover, according to the packaging container of the 4th aspect, a cover body can be attached with high intensity | strength by forming a some non-penetrating groove part, Furthermore, it forms in the side attached to the flange part of a container main body. This makes it easier to open the non-penetrating groove when the internal pressure rises.

  Moreover, according to the packaging container of the 5th aspect, since a some groove part can be formed in accordance with forming a cover body, manufacture becomes easy.

It is a perspective view of the packaging container of embodiment of this invention. 2A is a perspective view of the container body, and FIG. 2B is a perspective view of the lid. 3A is a plan view of the packaging container of the embodiment, FIG. 3B is an enlarged view of a IIIB portion of FIG. 3A, and FIG. 3C is a cross-sectional view taken along the line IIIC-IIIC of FIG. FIG. 4A is a plan view showing how the packaging container of the embodiment is used, and FIG. 4B is an enlarged view of the IVB portion of FIG. 4A. 5A is a cross-sectional view taken along line V-V in FIG. 4A, FIG. 5B is an enlarged view of the VB portion in FIG. 5A, and FIG. 5C is a cross-sectional view corresponding to FIG. FIG. 5D is an enlarged view of the VD portion of FIG. 5C. 6A is a plan view corresponding to FIG. 3B showing another example of forming a plurality of grooves, and FIGS. 6B to 6F are partially enlarged sectional views corresponding to FIG. 3C showing other shapes of the plurality of grooves. It is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment shown below exemplifies a packaging container for embodying the technical idea of the present invention, and is not intended to specify the present invention as the packaging container described here. The invention is equally applicable to other embodiments within the scope of the claims.

[Embodiment]
The packaging container according to the embodiment will be described with reference to FIGS. As shown in FIG. 1, the packaging container 10 according to the embodiment includes a box-shaped container body 11 in which an article to be packaged (not shown, the same applies hereinafter) is included, and a lid body 22 that covers the container body 11. ing. As shown in FIG. 2A, the container body 11 includes a rectangular bottom surface 12 having a predetermined area, side surfaces 13 to 16 erected from the periphery of the bottom surface, and a bottom surface 12 from an upper end portion of each of the side surfaces 13 to 16. The flange portions 17 to 20 are extended substantially horizontally and have a predetermined length, and the opening 21 is open on the side facing the bottom surface 12.

  The side surfaces 13 to 16 of the container main body 11 have side surfaces 13 and 14 having a large area and side surfaces 15 and 16 having a small area because the bottom surface 12 has a rectangular shape. Moreover, the flange parts 17-20 are extended by predetermined length from the upper end part of each side surface 13-16, and the cover body 22 is attached to this extended part. The flange portions 17 to 20 also have long flange portions 17 and 18 and short flange portions 19 and 20.

  The material used for the container body 11 may be a generally used material as long as it has a predetermined strength and is flexible enough to allow some deformation. Examples of the preliminary material include polypropylene resin, polyethylene resin, mixed resin of polypropylene resin and polyethylene resin, polyethylene terephthalate resin, polystyrene resin, and polylactic acid resin.

  Next, as shown in FIGS. 1, 2 </ b> B, and 3, the lid body 22 can cover the opening 21 of the container body 11 and has a rectangular shape having an area that can be attached to each flange portion 17 to 20. It is formed of a single layer or a laminated film body. Moreover, the part attached to the flange parts 17 and 18 of the elongate side of the cover body 22 is formed with the several groove part 23 (refer especially FIG. 3B). The plurality of groove portions 23 are formed in a line along the longitudinal direction of the lid body 22. Moreover, this groove part 23a is formed with the V-shaped groove | channel formed in the non-penetration, as shown to FIG. 3C. This groove part can be formed, for example, by passing the film body through a roller provided with a plurality of teeth having a predetermined shape. Further, as shown in FIG. 3B, the groove 23 a is formed so that the direction parallel to the longitudinal direction of the lid 22 is long, and the groove 23 is formed like a continuous perforation.

  A known material can be used for the lid 22, such as polyester resin, polyamide resin, polyethylene resin, polyethylene terephthalate resin, polypropylene resin, polystyrene resin, polylactic acid resin, and polyvinyl chloride resin. Polyvinylidene chloride-based resins, polycarbonate-based resins, composite films combining these, and the like can be used.

  The container main body 11 and the lid body 22 are attached by contacting the flange portions 17 to 20 of the container main body 11 in which the article to be packaged is contained and the peripheral portion of the lid body 22 corresponding thereto in contact with each other by heat welding. A known method can be used as the heat welding method. At this time, the lid body 22 is attached to the flange portion 17-20 side of the main body container 11 on the side where the plurality of groove portions 23 of the lid body 22 are formed (see FIGS. 5A and 5B).

  Next, the usage aspect of the packaging container 10 of embodiment is demonstrated with reference to FIG. 4, FIG.

  First, the packaging container 10 in which the article to be packaged (not shown) of the embodiment is placed in a microwave oven (not shown), and cooking is started. As heating progresses, steam is generated from the article to be packaged in the packaging container 10, the internal pressure in the packaging container 10 rises, and the lid body 22 begins to expand as shown in FIG. 5A. At this time, the container main body 11 is pulled by the inflating lid 22, so that a part of the side surface starts to deform as shown in FIG. 4. The side surfaces to be deformed are the side surfaces 13 and 14 having a large area, and the substantially central portions of the side surfaces 13 and 14 are deformed toward the inside of the container body 11. Then, the lid body 22 expands and the container body 11 is deformed, whereby the deformed portion of the flange portions 17 and 18 and the welded portion of the lid body 22 are pulled and begin to peel off from the flange portions 17 and 18 (FIG. 5A, see FIG. 5B). When the lid body 22 and the container main body 11 are swollen by the steam generated inside, this tends to approach the sphere like a balloon. At this time, since the distance from the center of the lid portion 22 to the center portion of the flange portions 17 and 18 is the shortest portion, the tensile stress of this portion first increases, and the lid body 22 is peeled off from the flange portions 17 and 18. Will begin.

  As the heating further proceeds, the internal pressure in the packaging container 10 further increases, so that the expansion of the lid body 22 increases and the deformation of the container body 11 also increases, and the lid body 22 and the flange portions 17 and 18 are further peeled off. The distance gets longer. Then, as shown in FIGS. 5C and 5D, when the groove portion 23a formed in the lid body 22 is peeled off, the non-penetrating groove portion 23a is broken and vapor is released. Therefore, the increase in the internal pressure in the packaging container is suppressed, and the bursting can be suppressed. Moreover, since the groove part 23a is formed by the perforation which each becomes longer in the longitudinal direction, the perforation is pulled in a direction perpendicular to the longitudinal direction, and the groove part is opened when the packaging container expands. It becomes easy. At this time, since the non-penetrating groove portion of the lid is formed on the side attached to the flange portion, the opening of the groove portion can be more easily performed.

  As mentioned above, according to the packaging container 10 of embodiment, when heating a packaging container with a microwave oven, the operation | work which opens beforehand is not required, Therefore It becomes easy to handle. Moreover, since a special shape is not formed in the container main body only by forming the groove portion in the lid, the manufacturing becomes inexpensive and the conventional container main body can be used. In addition, the inside air pressure of the packaging container can be kept at a high level during the range heating, and the cooking time is shortened because of the effect of a pressure cooker. It becomes possible to widen the width.

  The plurality of groove portions are not limited to one row as in the embodiment, and a plurality of groove portions 23A may be formed in a plurality of rows (two rows in FIG. 6A) as shown in FIG. 6A. Further, the plurality of groove portions are not limited to the non-penetration described in the embodiment, and may be penetrating like the plurality of groove portions 23B illustrated in FIG. 6B. By making the plurality of grooves penetrate, steam can be discharged more easily. Further, the shape of the groove portion is not limited to the non-penetrating V-shape described in the embodiment, and may be any shape. For example, a plurality of groove portions 23C having a “U-shape” in cross-sectional shape (see FIG. 6C). ), A plurality of “concave” grooves 23D (see FIG. 6D) and the like. Furthermore, even if it is the groove part formed in V shape, the angle of V shape to form can be adjusted to arbitrary angles. For example, an acute V-shape such as a plurality of grooves 23E illustrated in FIG. 6E or an obtuse V-shape such as a plurality of grooves 23F illustrated in FIG. 6F can be used. By doing in this way, the range of selection of a cooking method and a condition can be expanded further.

  In addition, if the position where the plurality of grooves are formed is close to the inside of the container body, it can be opened with the internal pressure being weak, and if it is away from the inside of the container body, the internal pressure can be kept high. It becomes possible and can be adjusted according to the article to be packaged.

10: Packaging container 11: Container body 12: Bottom surface 13, 14, 15, 16: Each side surface 17, 18, 19, 20: Flange portion 21: Opening portion 22: Lid body 23, 23A to 23F: Multiple groove portions 23a: Groove

Claims (5)

A box-shaped container body composed of a rectangular bottom surface, a side surface standing from each side of the bottom surface, and a flange portion extending from the upper end of the side surface; and the container body is covered, A lid attached to the flange portion, and a packaging container in which an article to be packaged is contained,
The packaging container is characterized in that at least one row of a plurality of groove portions is formed along the longitudinal direction of the lid body in a corresponding portion of the flange portion on the longitudinal side of the container body.   The packaging container according to claim 1, wherein each groove of the plurality of groove portions is formed in a direction parallel to a longitudinal direction of the lid body.   The packaging container according to claim 1 or 2, wherein the plurality of groove portions are formed by penetrating or non-penetrating, or a combination thereof. The plurality of grooves are formed non-penetrating,
The packaging container according to claim 1 or 2, wherein the lid is attached to the flange on the side where the plurality of non-penetrating grooves are formed.   The packaging container according to any one of claims 1 to 4, wherein the lid is attached to the container body after the plurality of grooves are formed in advance.

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