JP4459763B2 - Package - Google Patents

Description

  The present invention relates to a package for packaging contents such as a liquid product, a solid product, or a mixture thereof, and more particularly, a content of a food product such as a liquid product, a solid product, or a mixture thereof. The present invention relates to a package that can be cooked by a microwave oven in a state where an object is stored.

  2. Description of the Related Art Conventionally, a large number of packaged foods in which cooked or semi-cooked foods are filled and stored in plastic packaging bags and cooked with a microwave oven before eating or drinking are on the market. However, packaging bags filled with this type of food, when heated in a microwave oven, increase in internal pressure due to the thermal expansion of steam and internal air generated from the food. There was a problem of scattering and fouling in the microwave oven.

  To solve the above problem, before cooking in the microwave oven, make a small hole in the packaging bag in advance or cut out the end of the packaging bag to release the increase in internal pressure due to heating outside the packaging bag and break the bag It was preventing. However, such processing is time-consuming for consumers, and the steam generated by cooking is immediately released out of the packaging bag, reducing the cooking effect of steam and reducing the drying of food. This caused a deterioration in taste.

Therefore, in order to eliminate the inconveniences described above, “a food that has been cooked or semi-cooked can be completely sealed, and the food can be cooked in a microwave oven while being stored in a package. As a `` packaging body that can prevent the bursting and deformation of the packaging body '' by partially opening the packaging body and releasing the internal pressure inside the packaging body while exerting the effect of steaming the food stored in the packaging body with steam "In a package in which a packaging material composed of a heat-adhesive resin layer having an easily peelable inner layer is sealed with a thermal adhesive portion, at least one location on the inner peripheral edge of the package from the inner peripheral edge to the inner side of the package There has been proposed a “packaging body” characterized in that it has a bulging portion that is bulged and thermally bonded, and a cutting blade or notch is formed in the bulging portion (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-208739

  According to the package described in the patent document, food that has been cooked or semi-cooked can be completely sealed, and the food can be cooked with a microwave while being stored in the package, and further generated during cooking. While steaming the food stored in the package with steam, the internal pressure inside the package is automatically opened and part of the package is released to prevent bursting and deformation of the package, but during cooking When the food to be stored is a liquid product or a mixture with a high liquid ratio, the package will be held in error during handling after cooking. When the contents are moved in the direction of the opening, there is a risk that the liquid material may ooze out from the opening, which may cause the surroundings and clothes to become dirty.

  Accordingly, an object of the present invention is to solve the above-mentioned problem, and can cook cooked or semi-cooked food and can be cooked by a microwave oven while the food is stored in a package. The internal pressure due to steam generated during cooking can be released by the automatic opening of a part of the package, preventing the package from bursting or deforming, and holding the package after cooking and moving the wrong contents toward the opening. An object of the present invention is to provide a package that is free from contamination due to the liquefaction of the stored food leaching from the opening even if it is moved.

In order to solve the above-mentioned problem, the invention of claim 1 is a package in which a packaging material in which an inner layer is formed of a heat-adhesive resin layer is sealed with a heat-bonding portion, and a long side near one of the short sides at the inner peripheral edge. An overhanging portion that protrudes from the edge to the inside of the package body and has a peeling corner portion at the center side of the package body, an unbonded portion is provided in the overhanging portion, and at least the peeling angle in the unbonded portion A notch or notch is formed on the inner side of the part where the part is scheduled to be peeled off, and the overhanging part is a vertically long and substantially rectangular shape, and a vertically long and substantially rectangular unbonded part is provided in the overhanging part. The package is characterized in that a cut or notch is formed in the vicinity of the short side facing the peeling corner .

A second aspect of the present invention, the peeling angle portion is a package according to claim 1, characterized in that it is formed in a shape protruding toward the center of the package.

  The package of the present invention can seal cooked or semi-cooked food, and can be cooked by a microwave oven while the food is stored in the package, and steam generated during cooking and air inside the package The internal pressure due to expansion is released by a part of the automatic opening of the package, and there is an effect that the package can be prevented from being ruptured or deformed. Further, the direction in which the internal pressure in the package is released can be limited, and the contents can be prevented from being blown out.

  In addition, after discharging the steam generated by heating or the internal pressure due to air expansion inside the package, the content storage unit side at the peeled portion will be the contents even if the package is turned over and the content is moved toward the opening. The package acts in the expansion direction due to the weight of the object, and the space between the heat-bonded parts that did not peel is bent linearly, and as a reaction, the unbonded part in the peeled part is closed between the heat-bonded parts that did not peel As a result, the opening is closed, and the leaching of the liquid food product contained therein is prevented from leaching out of the opening, so that inconveniences such as contamination of the surroundings and clothes do not occur.

  The present invention will be described in detail below. First, as the resin used for the inner thermoadhesive resin layer in the present invention, those generally used as food packaging materials heated or cooked in a microwave oven can be used. Specifically, low-density polyethylene film, ultra-low-density polyethylene film, linear low-density polyethylene film, medium-density polyethylene film, high-density polyethylene film, unstretched polypropylene film, ethylene-vinyl acetate copolymer film, ethylene-acrylic An acid copolymer film, an ethylene-methacrylic acid copolymer film, an ethylene-methyl acrylate copolymer film, an ethylene-ethyl acrylate copolymer film, an ethylene-methyl methacrylate copolymer film, an ionomer film, or the like can be used. The thickness of the sealant layer is 20 to 100 μm, preferably 40 to 70 μm.

  Next, in the package of the present invention, the film used as the outer layer is a basic material constituting a packaging bag, and therefore, a synthetic resin having excellent properties in mechanical, physical, chemical and the like is used. For example, resins such as polyester, polyamide, polypropylene, polycarbonate, and polyacetal can be used, and cellophane, synthetic paper, and the like can be used. Moreover, since the film used as the outer layer is generally printed on the inner layer side of the film, printability is required, and a stretched film stretched in the biaxial direction is preferable. The thickness of the film may be a thickness that can be kept to the minimum necessary with respect to the strength, rigidity, etc. as the basic material, and about 12 to 30 μm is appropriate considering the cost. Moreover, the said film is good also as a structure which has barrier property as a film in which the polyvinylidene chloride was coated as needed, and the film in which the vapor deposition layer of inorganic substances, such as a silicon oxide and aluminum oxide, was formed.

  Furthermore, in the present invention, an intermediate layer may be provided between the inner layer and the outer layer, and the intermediate layer is usually used only when the inner layer and the outer layer cannot function as a packaging bag. Provided. The functions include gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc., which are required as packaging bags. These final functions are achieved by providing the intermediate layer. Examples of the base material used as the intermediate layer include polyolefins such as polyethylene terephthalate, polyamide, polyethylene, and polypropylene, polyvinyl chloride, polycarbonate, polyvinyl alcohol, ethylene-propylene copolymer, saponified ethylene-vinyl acetate copolymer, and the like. Film, paper, cellophane, synthetic paper, non-woven fabric, or the like can be used. Also, one or more of these substrates can be used in combination. In addition, the thickness of the base material only needs to satisfy a function required as a package, and can be appropriately selected as necessary.

  Next, the present invention will be described in detail below using embodiments shown in the drawings. FIG. 1 is a plan view of a first embodiment of a package according to the present invention. 2 is a schematic cross-sectional view taken along line XX of FIG. FIG. 3 is a schematic cross-sectional view taken along the line XX showing the state during cooking in FIG. 4 is a partially enlarged plan view showing a state of completion of cooking in FIG. FIG. 5 is a schematic cross-sectional view taken along the line XX showing the cooking completion state of FIG. FIG. 6 is a schematic cross-sectional view showing a state in which the package after the heat cooking in FIG. 1 is turned over. FIG. 7 is a plan view of a second embodiment of the package according to the present invention. FIG. 8 is a plan view showing an embodiment of the package according to the present invention.

  FIG. 1 is a plan view of a first embodiment of a package according to the present invention. FIG. 2 is a cross-sectional view taken along the line XX of FIG. 1, and the packaging bag 1 has a rectangular laminate 50, 50 composed of an outer layer 52 and an inner layer 51, which is a heat-adhesive resin layer. The four-side seal type packaging bag having the heat-bonding part 2 on the four-end edge by superimposing the four-end edges in such a manner that the long-side side near the short side of the heat-bonding part 2 It protrudes inward of the packaging bag 1 at the edge, has a substantially rectangular unbonded portion 5 in the region, a circular notch 4 in the unbonded portion 5, and a peeling angle at the center side of the package A substantially rectangular protruding portion 3 is formed as a portion 6. In addition, notches 7 and 7 are provided at the peripheral opening scheduled positions of the thermal bonding part 2 for opening for removing the stored food after cooking. In the embodiment, the peeling corner 6 is formed in a bowl shape protruding toward the center of the package.

  Further, in the embodiment, the notch 4 is a circular through-hole penetrating each of the laminates 50 and 50, but is not particularly limited, and the internal pressure F is formed by drilling one of the laminates. The discharge direction can also be limited. In addition to the circular shape, the shape of the notch may be a semicircular shape, an elliptical shape, or a polygonal shape represented by a triangular shape. Further, as the shape of the cut, an I shape, a U shape, a V shape, A shape capable of discharging the internal pressure, such as a Y shape or a semicircular shape, can be used.

  FIG. 3 is a schematic cross-sectional view taken along the line XX showing the state during cooking in FIG. 4 is a partially enlarged plan view showing a state of completion of cooking in FIG. FIG. 5 is a schematic cross-sectional view taken along the line XX showing the state of completion of cooking in FIG. 1. Although not shown, food to be cooked is enclosed in the packaging bag 1. When the packaging bag 1 containing food is put in a microwave oven and cooked, the steam generated from the food or the air in the packaging bag is thermally expanded to increase the internal pressure F, and the packaging bag 1 is gradually expanded. Become. Since the expanded state occurs with the center of the packaging bag 1 as the maximum expanded portion, the substantially rectangular projecting portion 3 is formed to project from the long side edge near the short side of the packaging bag 1 due to the increase of the internal pressure F. Then, peeling between the inner layers 51 and 51 of the peeling corner portion 6 closest to the center of the packaging bag 1 or from the inner layer 51 starts to occur due to delamination or cohesive failure. As shown in FIGS. When the peeling corner portion 6 of the protruding portion 3 is peeled to the line G indicating the peeling action position, that is, to the peeling planned position, and is connected to the non-bonded portion 5, the internal pressure F passes from the peeling corner portion 6 through the non-bonded portion 5. The bag is discharged from the cutout 4 to the outside and the packaging bag 1 is prevented from being broken or deformed. Further, the peeling that occurs at the peeling corner portion 6 of the overhang portion 3 reaches the non-bonded portion 5 and reaches the notch 4 and is stored in the packaging bag 1 until the internal pressure F is discharged out of the packaging bag 1. The food can be steamed and cooked, so a better taste can be obtained. As shown in FIG. 4, an unbonded portion 5 is interposed from the notch 4 to a line G indicating a peeling action position at which the peeling corner portion 6 of the overhanging portion 3 peels, that is, a planned peeling position. It is desirable that the thickness is at least 5 mm.

  By the end of cooking, the internal pressure F is discharged out of the packaging bag 1, and the internal pressure F applied to the peeling corner portion 6 and the unbonded portion 5 of the overhang portion 3 is significantly reduced. In a normal operation, with the short side of the thermal bonding part 2 on the overhanging part 3 side being supported upward, it is opened in a direction crossing the packaging bag 1 using the notch 7, and the stored food is used as tableware. For example, the stored food is a liquid or a mixture of a liquid and a solid, and the packaging bag 1 is placed in a flat state, or as shown in FIG. When the operation is performed, each of the laminates 50 and 50 on the content storage portion side of the packaging bag 1 acts in the expansion direction due to its own weight of the liquid content H, and between the thermal bonding portions 3 where the peeling is stopped by the peeling action, that is, FIG. 4 is bent linearly at a line G indicating the peeling action position shown in FIG. 4, and as a reaction, the laminates 50 and 50 of the unbonded portion 5 part act in the closing direction, so that the notches 4 and 4 are closed, and the liquid content Leaching of the object H from the notches 4, 4 or Out it is suppressed, and no generation inconveniences that around and clothing soiling.

  FIG. 7 is a plan view of the second embodiment of the packaging body according to the present invention, and the packaging bag 1 ′ is an inner layer which is a heat-adhesive resin layer having an easily peelable property with the outer layer 52, as in the first embodiment described above. A four-side seal type packaging having a thermal bonding portion 2 'on the four edge sides by superimposing the rectangular laminated body 50 composed of 51 so that the inner layers 51 face each other and thermally bonding the four edge edges. A bag that extends inward of the packaging bag 1 ′ at the long side edge near the short side of the thermal bonding portion 2 ′ and has a corner on the center side of the packaging bag 1 ′ as a peeling corner 6 ′ A vertically elongated substantially rectangular shape having a substantially rectangular unbonded portion 4 ′ in the region and a circular notch 4 ′ in the vicinity of the short side facing the peeling corner portion 6 ′ in the unbonded portion 4 ′. A protruding portion 3 ′ having a shape is formed. In addition, notches 7 ′ and 7 ′ are provided at the peripheral opening scheduled positions of the thermal bonding portion 2 for opening for taking out the stored food after cooking.

  Although illustration is omitted, as in the first embodiment, when the packaging bag 1 ′ containing the food is put into a microwave oven and cooked, the steam generated from the food or the air in the packaging bag is thermally expanded to the inside. The pressure F increases and the packaging bag 1 ′ gradually expands. Since the expanded state occurs with the center of the packaging bag 1 ′ as the maximum expanded portion, a vertically elongated, substantially rectangular-shaped tension stretched from the long side edge near the short side of the packaging bag 1 ′ due to an increase in the internal pressure F. Peeling due to delamination or cohesive failure starts to occur from the inner layer 51 between the inner corners 51 and 51 of the peeling corner portion 6 ′ closest to the center of the packaging bag 1 ′ at the protruding portion 3 ′, and the peeling angle of the protruding portion 3 ′ When the part 6 ′ is peeled to the position to be peeled and communicated with the non-bonded part 5 ′, the internal pressure F is discharged from the notch 4 ′ to the outside through the non-bonded part 5 ′ from the peeling corner part 6 ′. Bag breakage and deformation of the bag 1 'are prevented.

  After cooking, that is, after the internal pressure F is discharged to the outside, the stored food is a liquid or a mixture of liquid and solid, and the packaging bag 1 ′ is in a flat state, as described in the first embodiment. When the operation is performed such that the packaging bag 1 'is placed or the bag is overturned, the laminates 50 and 50 on the content storage unit side of the packaging bag 1' act in the expansion direction due to the weight of the liquid content, It bends linearly at the line G indicating the peeling action position shown in FIG. 4, and as a reaction, the laminates 50 and 50 on the unbonded portion 5 'side act in the closing direction, so the notch 4' is closed and the liquid content In addition to suppressing leaching or discharging of the object from the notch 4 ′, the overhanging portion 3 ′ has a vertically long and substantially rectangular shape as in this embodiment, and the peeling corner portion 6 ′ in the unbonded portion 5 ′ By providing a notch 4 'on the opposite short side, the peeling Since the distance of the unbonded portion 5 'between the operating position and the notch 4' is increased, the blocking portion is formed remarkably, and the effect of preventing the liquid content from leaching out of the notch 4 'is further enhanced. Can prevent the surroundings and clothes from being stained.

The present invention will be described in more detail with reference to the following examples.
Example 1
A biaxially stretched polyamide film of 15 μm is bonded to the vapor deposition surface of a biaxially stretched polyethylene terephthalate film provided with a 12 μm thick silicon oxide deposited layer by a known dry lamination method using a two-component reactive polyurethane adhesive, A laminate is prepared by bonding a 60 μm unstretched film made of a crystalline propylene-ethylene random copolymer to the biaxially stretched polyamide film surface by a well-known dry lamination method using a two-component reactive polyurethane adhesive. Then, the unstretched films of the laminate are overlapped and cut into a rectangular shape having a short side Y of 125 mm and a long side T of 175 mm as shown in FIG. 8, and the short side from the end edge to a seal width SY of 10 mm. The heat-bonding part is formed with the two sides and the heat-bonding part is formed with a seal width ST of 10 mm from the edge of both long sides. In the long side edge near the short side, the dimension K away from the inner side of the short side thermal bond part is 5 mm, the long side edge dimension L is 40 mm, The overhanging width M from the inner side of the heat-bonded portion of the side is a substantially rectangular shape with a length of 15 mm, and the corner on the center side of the laminated body is a hook-shaped peeling corner, from the inner side of the short-side heat-bonded portion The overhanging portion having a dimension P of 47 mm and having an unbonded portion on the inside is thermally bonded with a seal width SN of 3 mm, the dimension Q from the lower side of the overhanging portion facing the peeling corner in the overhanging portion is 30 mm, and the length A three-side sealed bag having a circular through hole with a radius of 2.5 mm centered on a position Z having a dimension R of 6 mm from the inner side of the side heat-bonding portion and having one short side opened was produced. The three-side sealed bag was filled with retort curry (200 g / bag), the bag was evacuated, and then the short side of the opening was thermally bonded and 50 bags were produced. This was heated for 90 seconds in a microwave oven (rated high-frequency output 600 W). The heating of both 50 bags starts 50 to 75 seconds after the internal pressure increases due to the vapor, etc., the peeling corner of the overhanging part peels off, and the inside of the vapor and the like passes through the unbonded part from the through hole. By discharging the pressure, the bag could be cooked without breaking the bag, and the taste of the retort curry was not impaired. In addition, after discharging the internal pressure such as steam for 50 bags, the bags were turned over and the contents were moved in the direction of the through-holes. However, as a reaction, the unbonded portion at the peeling corner acts in the closing direction and the through hole is closed, and the leaching of the liquid material of the encapsulated retort curry is suppressed and the surroundings and clothes are stained. No inconvenience occurred.

The top view of 1st embodiment of the package which concerns on this invention. The schematic cross section of the XX line of FIG. The schematic cross section of the XX line which shows the state in the middle of the heat cooking of FIG. The partially expanded plan view which shows the state of the heating cooking completion of FIG. Similarly, the schematic cross section of the XX line which shows the state of the completion of the heating cooking of FIG. The schematic cross section which shows the state which carried out the fall operation of the package after the heat cooking of FIG. The top view of 2nd embodiment of the package which concerns on this invention. The top view which shows one Example of the package which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 'Packaging bag 2, 2' Thermal bonding part 3, 3 'Overhang part 4, 4' Notch 5, 5 'Unbonded part 6, 6' Peeling corner part 7, 7 'Notch 50 Laminate 51 Inner layer 52 Outer layer F Internal pressure G Line indicating peeling action position H Liquid content

Claims (2)

In the package in which the inner layer is made of a heat-adhesive resin layer and sealed with a heat-bonding portion, the inner peripheral edge projects from the long side edge near one of the short sides to the inside of the package, It has an overhanging portion with the center side as a peeling corner, an unbonded portion is provided in the overhanging portion, and a notch or a notch is formed inside the unbonded portion at least from the planned peeling position of the peeling corner. The overhanging portion has a substantially rectangular shape in the vertical direction, and a non-adhesive portion in the vertical oblong shape is provided in the overhanging portion. A package having a notch formed therein . The package according to claim 1, wherein the peeling corner is formed in a shape protruding toward the center of the package.

Images