JP2013086866A - Package for microwave heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a package for microwave heating with a simple configuration which allows a package bag to be held with its opening part kept upward when the bag is once opened, a food material or the like is put into the bag, and then the bag is microwave heated.SOLUTION: When a food material is added to content 4 filled in an inner bag 1 and they are heated and cooked, the lid part 40 of an outer box 20 is folded back toward a front panel 21 via a hinge line 37. The bottom seal part 3c of the inner bag 1 is brought into contact with the inside of the left face panel 23b of the outer box 20, and the opening part 9 side is extended upward along the back of the lid part 40. Thus, the inner bag 1 is supported with its opening part 9 being kept obliquely upward.

Description

  The present invention relates to a microwave oven package for packaging food to be cooked by heating in a microwave oven.

  Conventionally, so-called retort foods in which cooked foods are sealed in a packaging bag (retort pouch) made of a laminated resin film are known. And with the spread of microwave ovens, retort foods that can be easily eaten simply by heating in a microwave oven are widely sold.

  By the way, when the retort food sealed in the packaging bag is heated in a microwave oven as it is, the packaging bag may expand due to water vapor generated from the food and may burst. Thus, a method has been devised in which a ventilation hole for allowing water vapor to escape is provided in the packaging bag.

  There is also a desire to add other foodstuffs in the packaging bag and to heat it with the cooking liquid filled in the packaging bag in advance. Therefore, a packaging bag having a zipper capable of closing the opening again after the packaging bag is opened and the ingredients are added has been devised. In the packaging bag as described above, it is necessary to keep the vent hole and the zipper part always upward so that the contents do not leak from the vent hole and the zipper part (opening part) during heating.

  For example, in Patent Document 1, an unfolded portion having a first folded portion and a second folded portion folded in a bellows shape is developed, and an end portion of a packaging bag in which a zipper and a steam hole are formed extends upward. Thus, a packaging bag is disclosed that prevents the contents from flowing in the direction of the steam holes. Further, Patent Document 2 discloses a packaging bag with a zipper to which standing property is imparted by providing a gusset portion on the opposite side of the opening scheduled portion where the zipper is provided.

  Patent Documents 3 and 4 disclose an outer packaging box for storing a packaging bag containing retort food, which can be used as a support when heating the packaging bag by assembling into a predetermined shape. Is disclosed.

JP 2009-12831 A JP 2010-95286 A JP 2002-12274 A JP 2009-137596 A

  However, in the methods of Patent Documents 1 and 2, since the packaging bag itself is self-supporting, the shape of the packaging bag becomes complicated, and the bag making process is also complicated. As a result, there is a problem that the cost of the packaging bag is increased and the bag making machine that can be used is also limited. Further, in the methods of Patent Documents 3 and 4, it is necessary for the consumer to assemble the outer box into a predetermined shape, which is troublesome. In addition, it is necessary to devise a method for displaying the assembly procedure.

  In view of the above problems, the present invention has a simple structure for heating a microwave oven that can be held with the opening portion facing upward when the packaging bag is once opened and the ingredients are added and then heated in the microwave. The purpose is to provide.

  In order to achieve the above-mentioned object, the present invention is formed by a laminated film including at least a base material layer and a thermoplastic resin layer that is an innermost layer, and a storage portion having an opening from which contents can be taken out after opening, A rectangular interior bag comprising: an opening / closing chuck thermally fused to the inner surface of the opening; and an easily peelable sealing portion formed between the opening / closing chuck and the storage portion; It is composed of a front plate and a rear plate facing each other, and four side plates connecting four sides of the front plate and the rear plate, and a flat rectangular parallelepiped outer box in which the inner bag is stored. A package for heating a microwave oven, wherein the outer box is formed with a lid portion that is connected to the front plate via a hinge line by breaking an opening line formed on the front plate, and the rear plate By placing the outer box flat with It is characterized in that to allow support leaning against the interior bag to the back surface of the lid portion in which the folded to the front plate side and the inner surface of the outer box.

  Further, the present invention provides the microwave oven packaging body configured as described above, wherein the outer dimension of the outer box in a direction parallel to the opening / closing direction of the lid is W1, and the remaining portion of the front plate when the lid is opened When the width of the inner bag is W2 and the dimension of the inner bag in the vertical direction when the opening of the inner bag is facing upward is L1, 0 <W2 ≦ 1/3 × W1 is satisfied and 1/2 × L1 ≦ W1 ≦ L1 + 10 mm is satisfied.

  Moreover, the present invention is characterized in that, in the microwave oven heating package having the above-described configuration, the hinge wire has a continuous S-shaped cut.

  Further, the present invention is the microwave oven packaging body configured as described above, wherein the inner bag is folded in half on the opposite side of the opening and closing chuck across the sealing portion and stored in the outer box. It is said.

  According to the first configuration of the present invention, the support bag for leaning the inner bag when the outer bag is heated in the microwave oven by leaning the inner bag on the inner surface of the outer box and the back surface of the folded lid portion. Can be used as Therefore, there is no possibility that the contents or added food will leak from the opening and contaminate the inside of the microwave oven. Moreover, since it can be used as a support for the interior bag simply by folding back the lid portion of the exterior box, it is not necessary to manufacture an interior bag or an exterior box having a complicated shape with self-supporting properties, and the manufacturing cost is reduced. Furthermore, it is not necessary for the consumer to assemble the outer box into a predetermined shape during cooking, and the usage is easy to understand.

  Further, according to the second configuration of the present invention, in the microwave oven packaging body of the first configuration, the outer dimension of the outer box in the direction parallel to the opening / closing direction of the lid is W1, and the lid is opened. When the width of the remaining portion of the front plate at the time is W2, the vertical dimension of the interior bag when the opening of the interior bag is facing upward is L1, 0 <W2 ≦ 1/3 × W1 is satisfied, and By satisfying 1/2 × L1 ≦ W1 ≦ L1 + 10 mm, the inner bag can be more stably supported when the outer box is used as a support base, and the inner bag can be taken out from the outer box. Can do.

  Moreover, according to the 3rd structure of this invention, in the microwave oven packaging body of the said 2nd structure, it is a cover part by making the hinge line which bend | folds a cover part into the structure where the S-shaped cut | notch continued. It becomes easy to maintain the bent state. Therefore, even when the weight of the interior bag is light, the interior bag can be stably supported with the opening portion facing upward.

  According to the fourth configuration of the present invention, in the microwave oven packaging body having any one of the first to third configurations, the inner bag is on the side opposite to the opening / closing chuck with the sealing portion interposed therebetween. By folding it in half and storing it in the outer box, the sealing portion is not peeled off because internal pressure is not applied to the sealing portion due to vibration or impact during transportation. Therefore, leakage of the contents to the opening / closing chuck portion can be prevented.

The schematic plan view of the interior bag 1 which comprises the package for microwave oven heating of this invention Partial cross-sectional view of the inner bag 1 near the top seal portion 3a Exploded view of the outer box 20 constituting the microwave oven packaging of the present invention The perspective view which shows the state which assembled the exterior box 20 The perspective view of the exterior box 20 which shows the state which fractured | ruptured the opening lines 33a and 33b and opened the cover part 40 The perspective view which shows the state which supported the interior bag 1 in the exterior box 20 The side view which shows the state which supported the interior bag 1 in the exterior box 20

  Hereinafter, the microwave oven packaging body of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view of an interior bag 1 constituting a microwave heating packaging according to an embodiment of the present invention. As shown in FIG. 1, the interior bag 1 is a plane composed of a storage portion 2 formed of a laminated film 10, and a top seal portion 3 a, a side seal portion 3 b, and a bottom seal portion 3 c that seal four sides of the storage portion 2. It has a rectangular shape, and the storage unit 2 stores the contents 4 (retort food here). An opening notch 6 is formed on one side (upper right side in FIG. 1) or two sides of the side seal portion 3b.

  An opening / closing chuck 7 made of a thermoplastic resin is provided inside the storage portion 2 and in the vicinity of the opening notch 6, and an easy peel property is provided on the opposite side of the upper surface sealing portion 3 a across the opening / closing chuck 7. A sealing portion 8 having (easy peelability) is formed. The sealing member 8a (see FIG. 2) forming the sealing portion 8 is integrally formed with the lower chuck 7b (see FIG. 2) of the opening / closing chuck 7 by co-extrusion. By tearing the side seal portion 3b from the opening notch 6 and cutting off the upper end of the interior bag 1, an opening 9 (see FIG. 6) is formed, and the opening / closing chuck 7 and the sealing portion 8 are further opened to open the opening. It is possible to add ingredients from the section 9 and to take out the contents 4.

  2 is a partial cross-sectional view of the interior bag 1 (a cross-sectional view taken along the line XX ′ in FIG. 1). The configuration of the interior bag 1 of the present embodiment will be described in detail with reference to FIG. A laminated film 10 forming the interior bag 1 is obtained by laminating a base material layer 11, an intermediate layer 13, and a thermoplastic resin layer 15 in order from the outside.

  Since the base material layer 11 is a basic material constituting the interior bag 1, it can withstand the conditions such as the formation and processing of the interior bag 1, and the workability, heat resistance, slipping property, pinhole resistance, water vapor Or it is preferable that it is excellent in the barrier property with respect to gas, and another characteristic, and can hold | maintain them satisfactorily without impairing the characteristic.

  As the base material layer 11 used in the present invention, a simple substance such as a biaxially stretched nylon film, a biaxially stretched polypropylene film or a biaxially stretched polyester resin film or a laminate thereof is used, and a biaxially stretched polyester resin film is used. Is particularly preferably used. Specific examples of the biaxially stretched polyester resin film include polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene-2, 6-naphthalate resin, polybutylene-2, 6-naphthalate, and polycyclohexanedimethylene terephthalate resin. Various polyester resins can be used.

  The biaxially stretched polyester resin film uses, for example, one or more of the above-mentioned polyester resins, and uses a film forming method such as an extrusion method, a cast molding method, a T-die method, a cutting method, and an inflation method. Using the above-mentioned various resins alone, or forming a multilayer co-extrusion film using two or more kinds of resins, and forming two or more kinds of resins into a film. A polyester-based resin film is manufactured by a method of forming a film by mixing in advance before forming, and further, for example, stretched uniaxially or biaxially using a tenter method or a tubular method A biaxially stretched polyester resin film can be used. The layer thickness of the base material layer 11 is preferably about 3 to 50 μm, more preferably about 5 to 30 μm.

  When forming the base material layer 11, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slip properties, mold release properties, flame retardancy, antifungal properties Various plastic compounding agents and additives can be added for the purpose of improving and modifying properties, electrical characteristics, strength, etc. Depending on the case, it can be added arbitrarily. In the above, as a general additive, for example, a lubricant, a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a filler, a reinforcing agent, an antistatic agent, a pigment, and the like can be used. In this case, a modifying resin or the like can also be used.

  An antistatic coating layer may be provided on the surface of the base material layer 11 in order to prevent problems associated with the generation of static electricity and improve the suitability for laminating, bag making, filling and packing, and the like. As a method for forming the antistatic coating layer, for example, a resin is used as a main component of the vehicle, and one or more antistatic agents are added thereto, and further, a plasticizer, a stabilizer, and an antioxidant are added as necessary. Add one or more additives such as additives, light stabilizers, UV absorbers, curing agents, crosslinking agents, lubricants, fillers, colorants, etc., and knead thoroughly with solvents, diluents, etc. To prepare a resin composition. Next, the resin composition is used, and this is coated or printed on the surface of the base material layer 11 by using a normal coating method or a printing method to form an antistatic coating layer.

  Antistatic agents include, for example, anionic surfactants, cationic surfactants, nonionic surfactants, surfactants such as amphoteric surfactants, inorganic antistatic agents such as metal powder and carbon, silicone One or more selected from antistatic agents, higher fatty acids and esters thereof, acid amides, salts, paraffinic hydrocarbons, waxes and the like can be used.

  Examples of the vehicle resin include polyethylene resin, polypropylene resin, ethylene-propylene copolymer, polyvinyl chloride resin, polyvinyl acetate resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer ( AS resin), acrylonitrile-butadiene styrene copolymer (ABS resin), acrylic or methacrylic resin, polycarbonate resin, alkyd resin, phenolic resin, maleic acid resin, natural resin, hydrocarbon resin, polyvinyl butyral resin 1 or 2 selected from polyamide resin, polyester resin, polyurethane resin, epoxy resin, urea resin, melamine resin, aminoalkyd resin, nitrocellulose, ethyl cellulose, chlorinated rubber, cyclized rubber, etc. It is possible to use more than.

  By adding one or more of the antistatic agents as described above to the polyester resin pellets that are the raw material of the base material layer 11 and kneading them sufficiently, a film is formed. Antistatic properties can be imparted to the material layer 11.

  The thermoplastic resin layer 15 may be any material that can be melted by heat and fused the laminated film 10 to each other. For example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low Density polyethylene, ethylene / α-olefin copolymer polymerized using metallocene catalyst (single site catalyst), polypropylene, ethylene / vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic Polyolefin resins such as acid copolymers, ethylene-methacrylic acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene or polypropylene, and unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, and fumaric acid. Acid-modified polyolefin resin modified with acid It one not selected et can be used two or more kinds. Preferable examples include linear low density polyethylene. The thickness of the thermoplastic resin layer 15 is preferably about 10 μm to 200 μm, more preferably about 50 μm to 100 μm, considering heat sealability and the like.

  In addition, for example, workability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc. are improved and modified. For this purpose, one or more of the above-mentioned antistatic agents are added to the melt-extruded resin constituting the thermoplastic resin layer 15, and various plastic compounding agents, additives, etc. Can be added. Examples of general additives include lubricants, crosslinking agents, antioxidants, ultraviolet absorbers, light stabilizers, fillers, reinforcing agents, antistatic agents, pigments, and the like. Resin etc. can also be used.

  When the inner bag 1 is subjected to physically and chemically severe conditions, the intermediate layer 13 has high sealing performance, puncture resistance (pinhole resistance), heat resistance, light resistance, quality maintenance, Workability, hygiene and the like are imparted.

  As the intermediate layer 13, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate. Copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer, Poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene styrene copolymer (ABS resin), polyester resin, polyamide resin , Poly -Any known resin film or sheet such as sulfonate resin, polyvinyl alcohol resin, saponified ethylene-vinyl acetate copolymer, fluorine resin, diene resin, polyacetal resin, polyurethane resin, nitrocellulose, etc. Can be used.

  The film or sheet may be any of unstretched and uniaxially or biaxially stretched. In particular, when the packaging film 1 requires puncture resistance (pinhole resistance), a stretched nylon film can be used. In addition, a light-shielding film or sheet obtained by adding a desired additive such as a colorant or an ultraviolet absorber and kneading to form a film can also be used. Moreover, although the thickness of the intermediate | middle layer 13 is arbitrary, it can select and use from the range of about several micrometers-300 micrometers.

  A dry laminate layer (not shown) is laminated between the base material layer 11, the intermediate layer 13, and the thermoplastic resin layer 15 constituting the laminated film 10. The dry laminate layer is a layer that firmly adheres the base material layer 11, the intermediate layer 13, and the thermoplastic resin layer 15 to prevent delamination. Examples of the laminating adhesive constituting the dry laminating layer include, for example, polyvinyl acetate adhesive, homopolymers such as ethyl acrylate, butyl, 2-ethylhexyl ester, and methyl methacrylate, acrylonitrile, styrene, etc. Copolymers such as polyacrylic acid ester adhesives, cyanoacrylate adhesives, and copolymers of ethylene and monomers such as vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, etc. System adhesives, cellulose adhesives, polyester adhesives, polyamide adhesives, polyimide adhesives, amino resin adhesives made of urea resin or melamine resin, phenol resin adhesives, epoxy adhesives, polyurethane Adhesives, reactive (meth) acrylic adhesives, Ropurengomu, nitrile rubber, styrene - rubber adhesive comprising a butadiene rubber, a silicone-based adhesive, an alkali metal silicate, may be used an inorganic adhesive or the like made of a low-melting-point glass or the like.

The composition system of the above-mentioned adhesive may be any composition form such as an aqueous type, a solution type, an emulsion type, and a dispersion type, and the property is any of film / sheet form, powder form, solid form, etc. Further, the bonding mechanism may be any of a chemical reaction type, a solvent volatilization type, a heat melting type, and a hot pressure type. As a method for forming a dry laminate layer, the above laminating adhesive is applied to one side of both layers by, for example, a coating method such as a roll coating method, a gravure roll coating method, a kiss coating method, or a printing method. Then, it can be formed by drying a solvent or the like, and its coating or printing amount is preferably about 0.1 to 10 g / m ^{2 in} a dry state.

  In addition, the printing layer for forming a desired printing pattern in the surface of the laminated | multilayer film 10 can also be provided in the inner surface of the base material layer 11 as needed. Further, in order to increase the adhesive strength between the base material layer 11 and the intermediate layer 13, an anchor coat layer is laminated on the back surface of the base material layer 11, and the intermediate layer 13 is laminated on the anchor coat layer via a dry laminate layer. It is good also as a structure. The anchor coat layer chemically treats the back surface of the base material layer 11. The thickness of the anchor coat layer is usually preferably about 0.1 to 2.0 μm. As the anchor coat agent constituting the anchor coat layer, for example, an isocyanate (urethane), polyethyleneimine, polybutadiene, organic titanium, or other anchor coat agent can be used.

  If the typical structure of the laminated film 10 is illustrated, a uniaxially stretched polyethylene terephthalate film (base material layer 11, 12 μm) / dry laminate layer / stretched nylon film layer (intermediate layer 13, 15 μm) / dry laminate layer / linear A low-density polyethylene layer (thermoplastic resin layer 15, 60 μm) can be exemplified.

  Next, the manufacturing method of the laminated | multilayer film 10 of this invention and the manufacturing method of the interior bag 1 using the laminated | multilayer film 10 are demonstrated. 2, the intermediate layer 13 is first laminated on the base material layer 11 via the dry laminate layer, and then the thermoplastic resin layer 15 is further laminated via the dry laminate layer. The film 10 is manufactured.

  Next, the long laminated film 10 wound in a roll shape is sequentially fed out and cut by a slitter (not shown) while being folded in two in the longitudinal direction to be divided into two laminated films 10. In addition, you may pay | feed out the laminated | multilayer film 10 slit by the predetermined width previously from a separate roll.

  Next, the two laminated films 10 are overlapped so that the thermoplastic resin layer 15 faces. Further, the long opening / closing chuck 7 wound in a roll shape is fed out and sandwiched at a predetermined position between the two laminated films 10 (the side on which the upper surface seal portion 3a in FIG. 1 is formed) and heat sealed. .

  As shown in FIG. 2, the opening / closing chuck 7 is composed of an upper chuck 7a and a lower chuck 7b. By supplying the opening / closing chuck 7 in accordance with the arrangement of the heat seal bar, one of the upper chucks 7a (the upper chuck 7a in FIG. The lower chuck 7b is heat-sealed to the other laminated film 10 (lower side in FIG. 2). At this time, a heat insulating plate (not shown) is interposed between the upper chuck 7a and the lower chuck 7b to prevent thermal fusion between the upper chuck 7a and the lower chuck 7b. Then, the sealing member 8a formed integrally with the lower chuck 7b is heat-sealed to the inner surface of the laminated film 10 on the side where the upper chuck 7a is heat-sealed (upper side in FIG. 2), so that the easy-peel sealing portion 8 is sealed. Form.

  Next, the two laminated films 10 are continuously heat-sealed on the upper side of the opening / closing chuck 7 to form the upper surface seal portion 3a, and heat-sealed at predetermined intervals in the long width direction of the laminated film 10, Side seal portion 3b is formed. Thereafter, the notch 6 for opening is put in the side seal portion 3b and cut in the width direction at the seal portion. On the other hand, the side opposite to the upper surface seal portion 3a is not heat-sealed and is left unsealed.

  As a heat sealing method, for example, a known method such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, or an ultrasonic seal can be used. In this manner, a semi-finished product of the interior bag 1 is manufactured in which the upper surface seal portion 3a and the side surface seal portion 3b are formed in three directions while leaving an unsealed portion.

  Finally, a predetermined amount of contents 4 are filled from the unsealed portion into the storage portion 2, and the unsealed portion is heat-sealed to form the bottom surface sealed portion 3c, whereby the interior bag 1 as shown in FIG. It becomes. As shown in FIG. 1, since the sealing portion 8 is provided between the storage portion 2 and the opening / closing chuck 7, there is no possibility that the contents 4 leak to the opening / closing chuck 7 side.

  FIG. 3 is a development view of the outer box 20 constituting the microwave oven package of the present invention, FIG. 4 is a perspective view showing the assembled outer box 20, and FIG. 5 is the outer box 20 opened. It is a perspective view which shows a state. As shown in FIG. 3, the outer box 20 is assembled from a single sheet (thick paper) punched into a predetermined shape, and the front plate 21 and the right side plate 23 a successively connected to the right end of the front plate 21 via a folding line. The rear plate 25, the left side plate 23b connected to the left end of the front plate 21 via a fold line, and the upper side plate 27 and the lower side plate 29 connected to the top and bottom of the front plate 21 via a fold line.

  An adhesive piece 30 a bonded to the back surface of the upper side plate 27 is connected to the upper end of the rear plate 25 via a folding line, and an adhesive piece bonded to the rear surface of the lower side plate 29 is connected to the lower end of the rear plate 25. 30b is connected through the folding line. Further, an adhesive piece 30c bonded to the back surface of the left side plate 23b is connected to the right end of the rear plate 25 via a fold line. In addition, flaps 31 are connected to the upper and lower ends of the right side plate 23a and the left side plate 23b via folding lines.

  Opening lines 33a and 33b each having a substantially L-shaped perforation are formed on the front plate 21 and the left side surface portion 23b. The unsealing lines 33a and 33b proceed along the upper and lower edges (boundary between the upper side plate 27 and the lower side plate 29) slightly from the right side of the center of the front plate 21 in the width direction (left and right direction in FIG. 3), and change the angle. Thus, the left corner of the front plate 2 is crossed obliquely, and the angle is changed further to cross the left side surface 23b diagonally to reach the substantially central portion in the longitudinal direction of the left side plate 23b. A knob portion 35 for connecting the opening lines 33a and 33b is formed on the side edge of the left side plate 23b. In addition, the front plate 21 is provided with a hinge line 37 in which S-shaped cuts that vertically cut the front plate 21 are connected so as to connect the ends of the unsealing wires 33a and 33b opposite to the knob portion 35.

  The procedure for assembling the outer box 20 will be described with reference to FIG. First, the right side plate 23a, the rear side plate 25, the adhesive piece 30c successively connected to the right side of the front plate 21 and the left side plate 23b connected to the left side of the front plate 21 are bent along a fold line, and the adhesive piece 30c is arranged inside the left side plate 23b. Glue. Next, the four flaps 31 connected to the upper side plate 27, the lower side plate 29, the adhesive plate 30a, 30b, the right side plate 23a, and the left side plate 23b connected to the front plate 21 and the rear plate 25 are bent along the fold line. The adhesive piece 30 b is bonded to the inside of the lower side plate 29.

  And after accommodating the interior bag 1 (refer FIG. 1), the outer surface of the adhesive piece 30a is adhere | attached on the back surface of the upper surface board 27, and the exterior box 20 is sealed. In this way, as shown in FIG. 4, the microwave oven heating package 100 in which the inner bag 1 is housed in the outer box 20 is assembled.

  When a large number of microwave heating packagings 100 are packed and transported in a large cardboard case, pressure is applied to the interior bag 1 in the exterior box 20 due to vibration and impact during transportation, and the internal pressure due to the contents 4 is reduced. The sealing part 8 may act on the sealing part 8 and peel off. When the sealing portion 8 is peeled off, the content 4 leaks to the vicinity of the opening / closing chuck 7 and soils the hands when opening / closing the opening / closing chuck 7. Therefore, it is preferable that the inner bag 1 is folded in half on the lower side (bottom seal portion 3c side) of the sealing portion 8 and stored in the outer box 20. In this way, it is possible to effectively prevent peeling of the sealing portion 8 due to pressure applied to the inner bag 1 and leakage of the contents 4 to the vicinity of the opening and closing chuck 7. Eliminates the possibility of soiling hands when opening and closing the opening and closing chuck 7.

  When taking out the inner bag 1 from the outer box 20, the unsealed wires 33 a and 33 b are broken by grasping and pulling up the knob portion 35 of the outer box 20. Then, as shown in FIG. 5, an opening 41 is formed in the front plate 21 by rotating the lid portion 40 (inner portions of the unsealing lines 33a and 33b) about the hinge wire 37 as an axis. 1 can be taken out.

  Next, a method for adding food to the contents 4 filled in the interior bag 1 and cooking by heating will be described. First, the user tears the upper end of the interior bag 1 from the opening notch 6 in the left-right direction, thereby forming an opening 9 (see FIG. 6) in the upper portion of the packaging bag 1. The opening 9 is sealed by an upper chuck 7a and a lower chuck 7b engaged with each other.

  Next, the engagement with the upper chuck 7a and the lower chuck 7b is released, and the opening 9 is widened and opened. At this time, the sealing portion 8 connected to the lower chuck 7b via the sealing member 8a is peeled from the inner surface of the storage portion 2 because it has an easy peel property. In this state, the food to be added is put into the storage portion 2 of the packaging bag 1 through the opening 9, and the upper chuck 7a and the lower chuck 7b are engaged again to seal the storage portion 2.

  Next, the inner bag 1 is placed in the outer box 2 after the inner bag 1 is taken out. Specifically, as shown in FIGS. 6 and 7, the lid portion 40 of the outer box 20 is folded back to the front plate 21 side via the hinge wire 37. Then, the bottom seal portion 3c of the interior bag 1 is brought into contact with the inner surface of the exterior box 20 (the corner portion between the left side plate 23b and the rear plate 25), and the opening 9 is leaned so as to be along the back surface of the lid portion 40. . Thereby, the interior bag 1 is supported in a state where the opening 9 is inclined upward. As shown in FIG. 3, the hinge wire 37 is formed by a continuous S-shaped notch, so that the folded state of the lid portion 40 can be easily maintained. Therefore, even when the weight of the interior bag 1 including the contents 4 and the added food is light, the interior bag 1 can be stably supported with the opening 9 facing upward.

  Subsequently, when the packaging bag 1 is placed in the microwave oven together with the outer box 20 and heated, the added food is cooked together with the contents 4. At this time, the storage unit 2 expands due to high-temperature steam generated by heating, and a steaming space in which the water vapor stays is formed in the upper part of the storage unit 2. The amount of water vapor exceeding the capacity of the storage unit 2 is released to the outside as appropriate when a part of the opening / closing chuck 7 is opened, and the packaging bag 1 is prevented from being ruptured. After the cooking is completed, the user again releases the engagement of the opening and closing chuck 7 to open the opening 9 and put the contents 4 with the food added on the container.

  According to the microwave oven heating package 100 of the present invention, the outer box 20 can be used as a support for leaning the inner bag 1 with the opening 9 facing upward during heating in the microwave oven. Therefore, there is no possibility that the contents 4 or the added food material leaks from the opening 9 and contaminates the inside of the microwave oven.

  In addition, since it can be used as a support for the interior bag 1 simply by folding the lid 40 of the exterior box 20, it is not necessary to manufacture the interior bag 1 or the exterior box 20 having a complicated shape that is self-supporting, and the manufacturing cost is reduced. Is also reduced. Furthermore, it is not necessary for the consumer to assemble the outer box 20 into a predetermined shape during cooking, and the usage is easy to understand.

  Next, the relationship between the dimensions of the interior bag 1 and the exterior box 20 will be described. As shown in FIG. 7, when the outer dimension of the outer box 20 in the direction parallel to the opening / closing direction of the lid 40 is W1, and the width of the remaining portion 43 of the front plate 21 when the lid 40 is opened is W2. It is preferable that 0 <W2 ≦ 1/3 × W1. When W2 exceeds 1/3 of W1, the opening 41 formed in the front plate 21 becomes small, and it becomes difficult to take out the interior bag 1 from the exterior box 20. Further, when W2 = 0, since the remaining portion 43 is eliminated, the right side plate 23a easily falls down due to the weight of the inner bag 1 when the outer box 20 is used as a support for the inner bag 1, and the inner bag 1 is securely attached. It becomes impossible to support.

  Moreover, it is preferable that the relationship between the dimension L1 of the up-down direction of the interior bag 1 and W1 when the opening part 9 is turned upward is 1/2 * L1 <= W1 <= L1 + 10mm. When W1 is smaller than 1/2 of L1, there is a possibility that the tip of the inner bag 1 hangs down when the outer box 20 is used as a support for the inner bag 1, and the opening and closing chuck 7 serving as a through hole is directed downward. Therefore, the contents 4 may leak from the opening 9 together with the water vapor. On the other hand, when W1 exceeds L1 + 10 mm, when the exterior box 20 is used as a support for the interior bag 1, the front end of the interior bag 1 does not reach the back surface of the lid 40 or even if it reaches, Since only a part is supported, the opening 9 cannot be lifted sufficiently. Moreover, since the interior bag 1 becomes easy to slide off from the cover part 40, support becomes unstable.

  The outer dimension W3 (see FIG. 4) of the outer packaging box 20 in the direction perpendicular to the opening / closing direction of the lid portion 40 indicates how the inner bag 1 can be stored in the outer packaging box 20 when the microwave heating package 100 is manufactured. In consideration, it is preferable to determine the length according to the length of one side of the interior bag 1 facing the side plates 23a, 23b. For example, when the inner bag 1 is stored in the outer box 20 in a stretched state without being folded, W3 may be set within a range of ± 10 mm of the longitudinal dimension L1 of the inner bag 1.

  Further, when the inner bag 1 is folded in two so as to overlap the upper surface seal portion 3a and the bottom surface seal portion 3c and stored sideways in the outer box 20, that is, the upper surface seal portion 3a and the bottom surface seal portion 3c are connected to the right side plate 23a or When storing so as to face the left side plate 23b, W3 may be set within a range of ± 10 mm of a dimension L2 (see FIG. 1) in a direction perpendicular to the longitudinal direction of the interior bag 1.

  As described above, the microwave heating package 100 of the present invention is a packaging material for retort food that is cooked in a microwave oven by adding ingredients such as sauces and seasoning liquids, Since it has excellent characteristics such as manufacturability, it is possible to provide a microwave heating packaging with significantly improved usability and cost.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, the configuration of the outer box 20 shown in FIG. 3 is only a preferable example, and instead of the hinge line 43 having a continuous S-shaped cut, the hinge line 43 is formed by a perforation or a crease with a continuous straight cut. It can also be formed.

  Moreover, the laminated structure of the laminated film 10 shown in FIG. 2 can also be changed as appropriate. For example, in FIG. 2, the thermoplastic resin layer 15 is laminated on the intermediate layer 13 via the dry laminate layer, but the dry laminate layer may be omitted and the thermoplastic resin layer 15 may be directly laminated on the intermediate layer 13.

  In addition, the lamination | stacking method of the laminated | multilayer film 10 mentioned above is only a preferable example, For example, as a manufacturing method of the laminated | multilayer film 10, the lamination | stacking method used when manufacturing a normal packaging material, for example, a wet lamination method, a solventless lamination method Coextrusion lamination method and other methods can also be used. Further, when the above layers are laminated, if necessary, pretreatment such as corona discharge treatment, ozone treatment, flame treatment, blast treatment, etc. can be optionally applied to the surface of the substrate to be laminated.

  Moreover, the manufacturing process of the package 1 mentioned above is only a preferable example, for example, can be manufactured batchwise. In that case, by sandwiching the opening and closing chuck 7 between the two laminated films 10 and superimposing them, heat sealing the upper chuck 7a, the lower chuck 7b, the sealing member 8a, and the peripheral edge of the laminated film 10, Various types of packaging bags 1 such as a two-side seal type, a three-side seal type, an envelope-attached seal type, a palm-attached seal type (pillow seal type), and a standing pouch can be manufactured. Hereinafter, the configuration of the present invention will be described more specifically using examples.

(1) A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm is used as the substrate layer 11, a printed layer is formed on the surface of the substrate layer 11 by gravure printing, and a dry laminate layer is interposed on the surface of the printed layer. Then, a stretched nylon film having a thickness of 15 μm was laminated as the intermediate layer 13. Furthermore, a laminated film 10 was produced by laminating an unstretched polypropylene film having a thickness of 60 μm as the thermoplastic resin layer 15 on the surface of the intermediate layer 13 via a dry laminate layer.

(2) Next, using the two laminated films 10 manufactured in the above (1) and a polyethylene resin opening / closing chuck 7 (manufactured by Idemitsu Unitech Co., Ltd., MFP-339), the outer dimension (L1) 235 mm × (L2) A semi-finished product of the interior bag 1 of 180 mm was manufactured.

(3) The packaging bag 1 manufactured in the above (2) was filled with the retort food as the contents 4 from the unsealed portion, and the unsealed portion was heat-sealed to produce a package 1 as shown in FIG. On the other hand, from the semi-finished product of the outer packaging box 20 shown in FIG. 3, the outer packaging box 20 having an outer dimension (W1) of 130 mm × (W3) 182 mm and the remaining portion 43 of the front plate 21 having a width (W2) of 30 mm is assembled. The packaging bag 1 folded in half on the lower side of 8 was stored in the horizontal direction to produce the microwave heating packaging 100 of the present invention.

  The package 100 for heating a microwave oven according to the present invention manufactured above could easily take out the inner bag 1 after gripping the knob portion 35 of the outer box 20 and breaking the opening wires 33a and 33b. In addition, the opening notch 6 was opened, the opening / closing chuck 7 was disengaged to form the opening 9, and after the food was added to the storage portion 2, the opening / closing chuck 7 was engaged again.

  Then, the outer packaging 20 is laid flat with the rear plate 25 facing down, the bottom seal portion 3c of the packaging bag 1 is brought into contact with the corners of the left side plate 23b and the rear plate 25, and the opening 9 side is covered with the lid portion 40. It stood on the back surface of the plate, placed in a microwave oven and heated. As a result, it was possible to stably support the packaging bag 1 with the opening 9 facing upward, and the contents 4 did not leak from the opening 9 together with water vapor.

  INDUSTRIAL APPLICABILITY The present invention can be used for a microwave heating packaging body for packaging a retort food cooked by heating in a microwave oven. By utilizing the present invention, it is not necessary to manufacture a complex-shaped interior bag or exterior box having self-supporting properties, and a low-cost microwave heating package can be provided. Moreover, since it is not necessary to assemble an exterior box into a predetermined shape at the time of cooking, it becomes a microwave heating packaging that is easy to use.

DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Storage part 3a Top surface seal part 3b Side surface seal part 3c Bottom surface seal part 4 Contents 6 Opening notch 7 Opening / closing chuck 7a Upper chuck 7b Lower chuck 8 Sealing part 8a Sealing member 9 Opening part 10 Laminated film 11 Base material layer 13 Intermediate layer 15 Thermoplastic resin layer 20 Exterior box 21 Front plate 23a Right side plate 23b Left side plate 25 Rear plate 27 Upper side plate 29 Lower side plate 33a, 33b Opening wire 37 Hinge wire 40 Lid 43 (of front plate 21 ) Remaining part

Claims (4)

A storage portion formed of a laminated film including at least a base material layer and an innermost thermoplastic resin layer and having an opening from which the contents can be taken out after opening, and an opening and closing heat-sealed to the inner surface of the opening A rectangular interior bag comprising: a chuck for use; and a sealing part having easy peelability formed between the opening and closing chuck and the storage part;
A flat rectangular parallelepiped outer box configured to include a front plate and a rear plate facing each other, and four side plates connecting four sides of the front plate and the rear plate,
A microwave oven packaging body comprising:
The outer box has a lid portion that is connected to the front plate through a hinge line by breaking the opening line formed on the front plate, and the outer box is placed flat with the rear plate down. By doing so, the packaging bag for heating a microwave oven can be supported by leaning the inner bag against the inner surface of the outer packaging box and the rear surface of the lid portion folded back to the front plate side. When the outer dimension of the exterior box in a direction parallel to the opening / closing direction of the lid is W1, the width of the remaining portion of the front plate when the lid is opened is W2, and the opening of the interior bag is facing upward When the dimension of the up-down direction of the said interior bag is set to L1, the following conditional expressions (1) and (2) are satisfy | filled, The packaging body for microwave oven heating of Claim 1 characterized by the above-mentioned.
0 <W2 ≦ 1/3 × W1 (1)
1/2 × L1 ≦ W1 ≦ L1 + 10 mm (2)   The said heating wire is a structure for the microwave oven heating of Claim 1 or Claim 2 which is the structure where the S-shaped notch continued.   4. The electronic device according to claim 1, wherein the inner bag is folded in half on the opposite side of the opening / closing chuck with the sealing portion interposed therebetween and is stored in the outer box. 5. Package for heating range.