JP2015009821A - Outer box for inner bag for microwave heating and packaging body for microwave heating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outer box for an inner bag for microwave heating which has a simple structure for reliably supporting an inner bag with a sufficient tilt angle when the inner bag is inflated by heating, and a packaging body for microwave heating having the same.SOLUTION: An outer box 1 includes: a front plate 2; a left side face plate 3a and a back face plate 4 which sequentially continue to a side 2c on the left side of the front plate 2 via fold lines; a right side face plate 3b which continues to a side 2d on the right side of the front plate 2 via fold lines; and a top face plate 5 and a bottom face plate 6 which continue to an upper side 2a and a lower side 2b of the front plate 2 via fold lines. First fold lines 13a, 13b comprising two creases extending in a direction to a lower side 4b of the back face plate 4 are formed on the back face plate 4 by using both end parts of a hinge line 9 as start points. When an inner bag is heated while being supported by the outer box 1, the outer box 1 bends at the first fold lines 13a, 13b by the inflation of the inner bag and is flexibly deformed in a thickness direction.

Description

  The present invention relates to an outer packaging box for a microwave heating inner bag for packaging food to be cooked by heating in a microwave oven, and a microwave oven heating packaging body including the same.

  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. Therefore, a method has been devised in which a ventilation portion for releasing water vapor is provided in the packaging bag. However, when a packaging bag provided with such a vent is placed flat in a microwave oven and heated, the liquid contents may leak out of the vent together with water vapor and contaminate the inside of the microwave oven. .

  In order to solve the above-described problems, a method has been proposed in which a packaging bag is supported in a predetermined posture using an outer box that houses the inner bag. For example, Patent Documents 1 and 2 disclose that a square cylindrical body formed of a front plate, a back plate, and two side plates, and a top plate and a bottom plate that close the upper and lower ends of the rectangular cylindrical barrel. In the exterior box constituted by the above, a front end portion (lid portion) connected to the back plate via the hinge line is formed by breaking the opening line formed on the front plate and the side plate. There is a method of tilting and supporting the interior bag with the ventilation portion facing upward by folding the tip portion toward the back plate side and storing the interior bag in the exterior box placed with the back plate facing downward. It is disclosed.

Japanese Patent No. 4480144 JP 2012-246056 A

  When an interior bag is supported and heated by the method of patent document 1, 2, the interior bag expand | swells and deform | transforms with the water vapor | steam generated when the contents are heated. At this time, depending on the deformed state of the interior bag, the contents may move upward and the balance of the interior bag supported by the exterior box may be lost, and the interior bag may fall down with the ventilation part down. In addition, when the inclination angle of the inner bag supported by the outer packaging box is not sufficiently large with respect to the capacity of the contents, the contents may be ejected from the ventilation portion due to an increase in internal pressure.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides an exterior box for an interior bag for heating a microwave oven having a simple configuration capable of reliably supporting the interior bag at a sufficient inclination angle even when the interior bag is inflated by heating, and the same. Another object is to provide a package for heating a microwave oven.

  In order to achieve the above object, the present invention is an exterior box of an interior bag for heating a microwave oven that houses an interior bag filled with contents that can be cooked by a microwave oven, and is a rectangular front plate facing each other And the back plate, and the front plate and the two side plates that connect the opposite sides of the back plate, and a rectangular tube-shaped body portion, and the front plate or the back plate is connected to the upper side, The back plate comprises: a top plate that seals the upper end of the rectangular tubular body; and a bottom plate that is connected to the lower side of the front plate or the back plate and seals the lower end of the rectangular tubular body. A hinge line parallel to the upper side of the back plate, extending from one end of the hinge line toward the side of the back plate, crossing the side plate and the front plate Opening line that continues to the other end of the hinge line and both ends of the hinge line as the starting point Said back plate parallel to each other extending in the lower direction of, or the first fold line of the two spacing becomes wider as it approaches the lower side of the back plate, it is characterized in that is formed.

  Further, according to the present invention, in the exterior box having the above-described configuration, in the middle of each first fold line, both end portions are continuous with the first fold line, and the convex sides face each other in a region sandwiched between the first fold lines. A convex cut is formed, and the cut line faces the tip when the opening line is broken and the tip including the top plate is folded back toward the back plate along the hinge line. It is characterized by that.

  According to the present invention, in the exterior box having the above-described configuration, an end point of the first folding line has a predetermined interval between a lower side and a side side of the back plate.

  According to the present invention, in the outer box configured as described above, a second fold line extending in a lower side direction of the front plate is formed on the front plate starting from the vicinity of the opening line.

  According to the present invention, in the exterior box having the above-described configuration, two second fold lines are formed, and an interval between the second fold lines becomes wider as the lower side of the back plate is approached.

  According to the present invention, in the exterior box configured as described above, an end point of the second fold line has a predetermined interval between a lower side and a side side of the front plate.

  According to the present invention, in the outer box configured as described above, a start point of the second fold line has a predetermined distance from the opening line.

  Further, the present invention provides an exterior box having the above-described configuration, wherein when the opening line is broken and a tip including the top plate is folded back toward the back plate along the hinge line, the back plate and the tip The dimension from the contact portion to the lower end of the outer box is larger than ½ of the dimension from the upper end to the lower end of the outer box before breaking the opening line.

  The present invention also includes an exterior box having the above-described configuration and an interior bag that is housed in the exterior box and filled with contents, breaks the opening wire, and connects the tip portion including the top plate to the hinge wire. The inner bag is stored in the outer box with the back plate facing downward, and the inner bag is supported with the upper end portion obliquely upward. It is a package.

  Moreover, the present invention is characterized in that, in the microwave oven heating package having the above-described configuration, a ventilation portion through which water vapor generated by heating the contents can pass is formed in the vicinity of the upper end portion of the interior bag.

  According to the first configuration of the present invention, the inner bag is slanted upward during heating in the microwave oven by simply folding back the tip of the outer packaging box after breaking the opening line to the back plate side along the hinge line. It can be used as a support for supporting. Further, since the first folding line is formed on the back plate, the outer packaging box is bent at the first folding line due to the expansion of the inner bag, and is always smoothly bent and deformed in the thickness direction. This prevents the contents in the interior bag from moving in the direction of the upper end due to internal pressure even when the interior bag is inflated, and prevents the interior bag from collapsing with the exterior box with the upper end down. Can do. Furthermore, the both ends of the opening in the width direction are lifted upward by bending the back plate along the first fold line. Therefore, the inclination angle of the exterior box and the interior bag with respect to the installation surface becomes sufficiently large, and the upper end portion of the interior bag can be reliably lifted.

  Moreover, according to the 2nd structure of this invention, in the exterior box of the said 1st structure, the convex side which a convex side mutually opposes in the area | region pinched | interposed into the 1st fold line in the middle of each 1st fold line. When the notch is formed, the opening line is broken, and the tip including the top plate is folded back to the back plate along the hinge line, the notch faces the tip so that the back plate is the first fold line The portion surrounded by the cut is cut and raised by bending at, and becomes a leg portion and comes into contact with the tip portion. Thereby, since the inclination | tilt angle of the exterior box and an interior bag with respect to an installation surface becomes larger, the upper end part of an interior bag can be raised more largely.

  Moreover, according to the 3rd structure of this invention, in the exterior box of the said 1st or 2nd structure, a predetermined space | interval is provided between the end point of a 1st fold line, and the lower side and side edge of a backplate. Thus, when the outer box is assembled from the blank plate, it can be prevented from being bent by the first fold line by mistake.

  Further, according to the fourth configuration of the present invention, in the exterior box having any one of the first to third configurations, the second fold extending on the front plate in the lower side direction of the front plate starting from the vicinity of the opening line. Since the front plate is bent along the second fold line by forming the line, the outer box is easily bent and deformed in the thickness direction. Therefore, both ends of the opening of the exterior box are lifted more smoothly, and the inclination angle of the interior bag supported by the exterior box can be sufficiently increased. In addition, when pressing the upper part of the opening line of the front plate and breaking a part of the opening line, the lower part of the opening line of the front plate is bent along the second fold line, so that the broken part is indicated. It becomes easy to insert. Therefore, the opening operability of the outer box is also improved.

  Further, according to the fifth configuration of the present invention, in the outer packaging box of the fourth configuration, the two folding lines are formed so that the interval becomes wider as approaching the lower side of the back plate. The entire front plate can be smoothly bent and deformed from the side to the bottom plate side.

  According to the sixth configuration of the present invention, in the exterior box having the fourth or fifth configuration, a predetermined interval is provided between the end point of the second fold line and the lower side and the side side of the front plate. Thus, when the outer box is assembled from the blank plate, it can be prevented from being bent by the second fold line by mistake.

  Further, according to the seventh configuration of the present invention, in the exterior box of any of the fourth to sixth configurations, by providing a predetermined interval between the start point of the second fold line and the opening line, When the upper part is pressed from the opening line of the front plate to break the opening line, the lower part than the opening line of the front plate is not bent and deformed more than necessary, and the opening line can be smoothly broken. Moreover, it can produce stably when it pierce | punches into the blank board of an exterior box.

  Moreover, according to the 8th structure of this invention, in the exterior box of the said 1st thru | or 7th structure, a tear line is fractured | ruptured, and the front-end | tip part containing a top | upper surface board is made into a back board side along a hinge line. When folded back, the dimension from the abutting part of the back plate and the tip part to the lower end part of the outer packaging box is larger than ½ of the dimension from the upper end part to the lower end part of the outer packaging box before breaking the opening line. By making it large, there is no possibility of the outer box falling over during heating or the inner bag jumping out of the outer box.

  According to a ninth configuration of the present invention, there is provided an outer packaging box having any one of the first to eighth configurations, and an inner packaging bag that is housed in the outer packaging box and filled with the contents, and is opened. The inner bag has its upper end diagonally upwards by folding the top part including the top panel back to the back panel along the hinge line and storing the interior bag in the exterior box with the back panel facing down Therefore, it is not necessary to manufacture an intricately shaped interior bag or exterior box having self-supporting properties, and a package for heating a microwave oven having a simple configuration and low cost 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.

  Moreover, according to the 10th structure of this invention, in the microwave oven packaging body of the said 9th structure, the ventilation | gas_flowing part which the water vapor | steam which generate | occur | produces by the heating of the contents can pass in the vicinity of the upper end part of an interior bag. By being formed, the upper end portion of the interior bag in which the ventilation portion is formed is always supported obliquely upward by the exterior box. Thereby, the upper end of an interior bag faces down and the malfunction which the content spouts from a ventilation part can be suppressed.

The expanded view of the exterior box 1 of 1st Embodiment which comprises the package 100 for microwave oven heating of this invention. The perspective view which looked at the packaging body 100 for microwave oven heating in which the interior bag 20 was accommodated in the exterior box 1 of 1st Embodiment from the front plate 2 side. The perspective view which looked at the packaging body 100 for microwave oven heating in which the interior bag 20 was accommodated in the exterior box 1 of 1st Embodiment from the backplate 4 side. The perspective view which looked at the state which fractured the opening lines 10a and 10b and opened the exterior box 1 from the front plate 2 side Schematic plan view of the interior bag 20 constituting the packaging body 100 for heating a microwave oven of the present invention Partial cross-sectional view of the inner bag 20 near the top seal portion 3a The side view which shows the state which supported the interior bag 20 in the exterior box 1 of 1st Embodiment. The perspective view which looked at the state which supported and heated the interior bag 20 in the exterior box 1 of 1st Embodiment from the opening 1a side. The side view which shows the other support form of the interior bag 20 using the exterior box 1 of 1st Embodiment. The perspective view which looked at the state which supported and heated the interior bag 20 in the exterior box 1 with the support form of FIG. 9 from the opening 1a side. The expanded view of the exterior box 1 of 2nd Embodiment which comprises the packaging body for microwave oven heating of this invention The perspective view which looked at the packaging body 100 for microwave oven heating with which the interior bag 20 was accommodated in the exterior box 1 of 2nd Embodiment from the front plate 2 side. The perspective view which looked at the state which supported and heated the interior bag 20 in the exterior box 1 of 2nd Embodiment from the opening 1a side. The expanded view of the exterior box 1 of 3rd Embodiment which comprises the packaging body for microwave oven heating of this invention The perspective view which looked at the packaging body 100 for microwave oven heating in which the interior bag 20 was accommodated in the exterior box 1 of 3rd Embodiment from the backplate 4 side. The side view which shows the state which supported and heated the interior bag 20 in the exterior box 1 of 3rd Embodiment. The perspective view which looked at the state which supported and heated the interior bag 20 in the exterior box 1 of 3rd Embodiment from the opening 1a side.

  Hereinafter, the microwave oven packaging body of the present invention will be described with reference to the drawings. FIG. 1 is a development view of the outer packaging box 1 of the first embodiment constituting the microwave packaging 100 of the present invention. FIGS. 2 and 3 are assembled states of the outer packaging box 1 of the first embodiment, respectively. FIG. 4 is a perspective view showing a state in which the exterior box 1 of the first embodiment is opened. In FIG. 4, only the outer shape of the inner bag 20 is indicated by a broken line so that it is easy to grasp the opened state of the outer box 1.

  As shown in FIG. 1, the exterior box 1 is assembled from a single sheet (thick paper) punched into a predetermined shape, and is sequentially connected to the front plate 2 and the left side 2c of the front plate 2 via a folding line. 3a, a back plate 4, a right side plate 3b connected to the right side 2d of the front plate 2 via a folding line, and a top plate 5 and a bottom plate 6 connected to the upper side 2a and the lower side 2b of the front plate 2 via a folding line. Have.

  An adhesive piece 7a bonded to the back surface of the top plate 5 is connected to the upper side 4a of the back plate 4 via a folding line, and an adhesive bonded to the back surface of the bottom plate 6 is connected to the lower side 4b of the back plate 4. The pieces 7b are continuously provided via folding lines. An adhesive piece 7c bonded to the back surface of the right side plate 3b is connected to the left side 4c of the back plate 4 via a fold line. A flap 8 is connected to the upper and lower ends of the left side plate 3a and the right side plate 3b via a fold line. On the upper side (closer to the adhesive piece 7a) than the center part of the back plate 4, a hinge wire 9 in which a mountain-shaped cut is continuous is provided.

  Further, an opening line 10a having continuous perforations is formed between one end (right end) of the hinge line 9 and the left side plate 3a and the upper portion of the front plate 2 to the end edge of the right side plate 3b. Between the other end (left end) of the line 9 and the edge of the adhesive piece 7c, an opening line 10b with a perforation is formed. The opening line 10a formed on the right side plate 3b is formed at a position overlapping with the opening line 10b formed on the adhesive piece 7c when the packaging box 1 is assembled. An opening line 10a extending from both ends of the hinge line 9 to the left side plate 3a and an opening line 10b extending to the adhesive piece 7c form a gentle curve that is convex toward the upper side 4a of the back plate 4. On the other hand, the opening line 10a from the left side plate 3a across the front plate 2 to the right side plate 3b draws a gentle curve convex toward the lower side 2b of the front plate 2, and the front plate 2 has an opening line. A pressing portion 12 surrounded by 10a and an arcuate crease 11 is formed.

  In addition, first fold lines 13a and 13b are formed of two creases extending from the both ends of the hinge line 9 in the direction of the lower side 4b (adhesive piece 7b) of the back plate 4. The first fold lines 13a and 13b are formed in a “C” shape in which the interval becomes wider as approaching the lower side 4b. The first fold lines 13a and 13b are not limited to folding lines, and may be formed by continuous perforations, or may be formed by half cut lines.

  Next, the assembly procedure of the exterior box 1 is demonstrated using FIG. First, the left side plate 3a, the back plate 4, the adhesive piece 7c sequentially connected to the left side 2c of the front plate 2 and the right side plate 3b connected to the right side 2d of the front plate 2 are bent along a fold line, and the inner side of the right side plate 3b. Adhesive piece 7c is bonded to each other to form a rectangular tube-shaped body. Next, the top plate 5, the bottom plate 6 connected to the upper side 2a and the lower side 2b of the front plate 2, the adhesive pieces 7a, 7b connected to the upper side 4a and the lower side 4b of the back plate 4, the four pieces connected to the left side plate 3a and the right side plate 3b. The flap 8 is bent along the fold line, and the adhesive piece 7 b is bonded to the inside of the bottom plate 6.

  And after accommodating the interior bag 20 (refer FIG. 5) from the opening of the upper end in which the top plate 5 and the adhesive piece 7a were connected, the outer surface of the adhesive piece 7a was adhere | attached on the back surface of the top plate 5, and the exterior box 1 Is sealed. Thus, as shown in FIG.2 and FIG.3, the microwave oven heating package 100 which accommodated the interior bag 20 in the exterior box 1 is assembled.

  When taking out the inner bag 20 from the outer box 1, the pressing part 12 formed on the front plate 2 of the outer box 1 is pressed with a finger to break a part of the opening line 10 a, and the finger is inserted into the broken part. The pressing part 12 is gripped. Then, the pulling portion 12 is pulled up to completely break the opening wires 10a and 10b, and the tip portion 15 (the portion on the top plate 5 side of the opening wires 10a and 10b) is rotated upward with the hinge wire 9 as an axis. By moving, as shown in FIG. 4, an opening 1 a is formed in the outer box 1, and the inner bag 20 can be taken out.

  FIG. 5 is a schematic plan view of the interior bag 20 constituting the microwave oven heating package 100, and FIG. 6 is a partial cross-sectional view of the interior bag 20 (a cross-sectional view taken along the line XX ′ in FIG. 5). As shown in FIG. 5, the interior bag 20 is a plane composed of a storage portion 23 formed of a laminated film 21, and a top seal portion 25 a, a side seal portion 25 b, and a bottom seal portion 25 c that seal four sides of the storage portion 23. It is a four-sided seal bag having a rectangular shape, and the storage unit 23 stores contents 27 (retort food). An opening notch 30 is formed on one side (upper right side in FIG. 5) or two sides of the side seal portion 25b.

  In the upper part of the storage part 23, a ventilation part 31 having a stress concentration part due to internal pressure is provided at a part of the thermal bonding part formed so as to surround the ventilation hole R at a position adjacent to the side seal part 25 b. . When the internal pressure of the interior bag 20 rises due to the water vapor from the contents 27 filled in the storage portion 23 during heating, the vent portion 31 peels off the stress concentration portion of the heat-bonding portion due to the internal pressure, and the water vapor from the vent hole R. The interior bag 20 is ruptured and the contents 27 scattered by the rupture are prevented from being damaged in the microwave oven. For this reason, when supporting the interior bag 20 using the packaging box 1 as will be described later, the ventilation portion 31 is provided so that the ventilation portion 31 provided on the upper portion of the interior bag 20 is exposed from the opening 1 a of the packaging box 1. It is necessary to store with the upper surface seal portion 25a side where the Note that the internal pressure discharging mechanism by the water vapor in the interior bag 20 is not limited to the vent portion 31 described above.

  Next, the configuration of the laminated film 21 forming the interior bag 20 will be described in detail with reference to FIG. The laminated film 21 forming the interior bag 20 is obtained by laminating a base material layer 33, an intermediate layer 35, and a thermoplastic resin layer 37 in order from the outside.

  Since the base material layer 33 is a basic material that constitutes the interior bag 20, it can withstand the conditions such as the formation and processing of the interior bag 20, and is easy to work, heat resistant, slippery, pinhole resistant, 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 33 used in the present invention, a simple substance such as a biaxially stretched nylon film, a biaxially stretched polypropylene film, 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. As a layer thickness of the base material layer 33, about 3-50 micrometers, More preferably, about 5-30 micrometers is desirable.

  When forming the base material layer 33, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, etc. 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.

  Note that an antistatic coating layer may be provided on the surface of the base material layer 33 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 33 by using a normal coating method, a printing method, or the like 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 above-mentioned antistatic agents to the polyester resin pellets that are the raw material of the base material layer 33, and kneading them sufficiently, a film is formed. Antistatic properties can also be imparted to the material layer 33.

  The thermoplastic resin layer 37 may be any layer that can be melted by heat and can fuse the laminated film 21 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 37 is preferably about 10 μm to 200 μm, particularly 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 37, 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 20 is subjected to severe physical and chemical conditions, the intermediate layer 35 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 35, 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. The thickness of the intermediate layer 35 is arbitrary, but can be selected from a range of several μm to 300 μm.

  A dry laminate layer (not shown) is laminated between the base material layer 33, the intermediate layer 35 and the thermoplastic resin layer 37 constituting the laminated film 21. The dry laminate layer is a layer that firmly adheres the base material layer 33, the intermediate layer 35, and the thermoplastic resin layer 37 to prevent the occurrence of 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 the 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 21 can also be provided in the inner surface of the base material layer 33 as needed. Further, in order to increase the adhesive strength between the base material layer 33 and the intermediate layer 35, an anchor coat layer is laminated on the back surface of the base material layer 33, and the intermediate layer 35 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 33. 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 21 is illustrated, a uniaxially stretched polyethylene terephthalate film (base layer 33, 12 μm) / dry laminate layer / stretched nylon film layer (intermediate layer 35, 15 μm) / dry laminate layer / linear A low-density polyethylene layer (thermoplastic resin layer 37, 60 μm) can be exemplified.

  In addition, there is no restriction | limiting in particular about the lamination | stacking method of the laminated | multilayer film 21, It replaces with the dry lamination method mentioned above, The lamination | stacking method used when manufacturing a normal packaging material, for example, a wet lamination method, a solventless lamination method, a common method, is used. An extrusion lamination method or other methods can 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.

  Also, the manufacturing process of the interior bag 20 described above is not particularly limited. For example, the long laminated film 21 wound in a roll shape can be successively drawn out and continuously formed, or can be manufactured in a batch type. In that case, the two laminated films 21 are overlapped, and the peripheral edge of the laminated film 21 is heat-sealed, so that a two-side seal type, a three-side seal type, an envelope-attached seal type, and a palm-attached seal type (pillow seal type) Various types of interior bags 20 such as standing pouches can be manufactured.

  FIG. 7 is a side view showing a state in which the inner bag 20 is supported by the outer box 1 of the first embodiment, and FIG. 8 shows a state in which the outer box 1 and the inner bag 20 in FIG. 7 are heated from the opening 1a side. FIG. A method of cooking the contents 27 filled in the interior bag 20 will be described with reference to FIGS. First, as shown in FIG. 4, the opening lines 10 a, 10 b of the outer box 1 are broken to expose the upper end portion of the inner bag 20.

  Next, the front end 15 of the outer box 1 is folded back to the back plate 4 side via the hinge wire 9, and the front end 15 is brought into contact with the back plate 4. And the exterior box 1 which accommodated the interior bag 20 is installed in the installation surface F in a microwave oven in the state which turned the backplate 4 downward. As a result, as shown in FIG. 7, the outer packaging box 1 is supported by the tip 15 with the opening 1a obliquely upward, so that the inner bag 20 housed in the outer packaging 1 also has the upper end obliquely upward. Supported by the state. As shown in FIG. 3, the hinge wire 9 is formed by continuous chevron cuts, so that the bent state of the distal end portion 15 can be easily maintained. Therefore, even when the weight of the interior bag 20 including the contents 27 is light, the interior bag 20 can be stably supported.

  In this state, the contents 27 are cooked by heating the interior bag 20 together with the exterior box 1. At this time, the storage unit 23 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 23.

  Along with the expansion of the storage portion 23, a force acts to push the outer box 1 from the inner side, but the outer box 1 bends along the folding lines 13 a and 13 b formed on the back plate 4. The amount of water vapor exceeding the capacity of the storage part 23 is diffused from the ventilation hole R to the outside as appropriate, part of the thermal bonding part of the ventilation part 31 is opened, the storage part 23 and the ventilation hole R communicate with each other. Thereby, the bursting of the interior bag 20 is prevented. After the cooking is finished, the user breaks the upper end portion of the interior bag 20 from the opening notch 30 and puts the contents 27 on the container.

  According to the microwave oven heating packaging body 100 of the present invention, the support base for supporting the interior bag 20 obliquely upward during heating in the microwave oven simply by folding the front end 15 of the outer box 1 to the back plate 4 side. Can be used as Therefore, there is no possibility that the contents 27 leak from the ventilation part 31 and contaminate the inside of the microwave oven. Moreover, it is not necessary to manufacture the interior bag 20 and the exterior box 1 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 1 into a predetermined shape during cooking, and the usage is easy to understand.

  And since the 1st fold line 13a, 13b is formed in the backplate 4, the exterior box 1 bends by the 1st fold line 13a, 13b by expansion | swelling of the interior bag 20, and it is always thickness direction (up-down direction). Deforms and deforms. Thereby, even when the interior bag 20 is inflated, the contents 27 in the interior bag 20 do not move toward the upper end due to the internal pressure, and the interior bag 20 falls down with the outer box 1 with the upper end down. Can be prevented. The back plate 4 is not easily bent and deformed compared to the front plate 2 because the portion folded back by the hinge wire 9 is doubled, but smooth by forming the first fold lines 13a and 13b. Can be transformed into

  Further, the back plate 4 is bent at the first fold lines 13a and 13b, so that both end portions in the width direction of the opening 1a are lifted upward. Therefore, the inclination angle of the exterior box 1 (and the interior bag 20 supported by the exterior box 1) with respect to the installation surface F becomes sufficiently large, and the upper end portion of the interior bag 20 in which the ventilation portion 31 is formed can be reliably lifted. it can. The interior bag 20 used in the present embodiment has a ventilation portion 31 formed along the side seal portion 25b of the interior bag 20, but the interior bag 20 is provided in the storage portion 23 as shown in FIG. The entire upper end is lifted upward by expansion. Therefore, the same effect can be obtained when using the interior bag 20 in which the ventilation portion 31 is formed near the center of the upper end portion.

  Here, even if the first folding lines 13a and 13b are formed so as to be substantially parallel to each other, the effect of deforming the back plate 4 can be obtained. However, while the opening 1a side of the back plate 4 can be freely bent and deformed, the deformation of the lower end portion of the back plate 4 is restricted by adhesion between the bottom plate 6 and the adhesive piece 7b. As in the present embodiment, the first fold lines 13a and 13b are formed in a “C” shape in which the distance increases from the opening 1a side toward the lower end, thereby extending from the opening 1a side to the bottom plate 6 side. Thus, the entire back plate 4 can be smoothly bent and deformed.

  Further, if the first fold lines 13a and 13b overlap the lower side 4b or the left and right side sides 4c and 4d (ridge lines of the outer box 1) of the back plate 4, when the outer box 1 is folded and assembled, There is a possibility that the wires 13a and 13b may be bent. Therefore, as in the present embodiment, the end points of the first fold lines 13a and 13b are set so that the first fold lines 13a and 13b do not overlap with the ridge lines of the peripheral edge of the back plate 4 and the lower side 4b and the left and right sides of the back plate 4 It is preferable to keep away from the side edges 4c and 4d.

  Further, the dimension W from the fulcrum P where the outer packaging box 1 (back plate 4) and the tip 15 abut to the lower end of the outer packaging box 1 is the vertical dimension of the outer packaging box 1 before breaking the unsealing lines 10a and 10b. It is set to be larger than 1/2 of L (see FIG. 2). Since the longitudinal dimension L of the exterior box 1 is substantially equal to the longitudinal dimension of the interior bag 20, the fulcrum P supports the upper part of the longitudinal center of the exterior box 1 and interior bag 20. Therefore, there is no possibility that the exterior box 1 will fall down with the opening 1a down, and the inner bag 20 jumps out of the opening 1a during heating, or the contents of the inner bag 20 are ejected from the vent portion 31 with the upper end of the inner bag 20 facing downward. Problems can be prevented.

  In addition, as shown in FIG. 9, it is also possible to support the interior bag 20 by turning the front end portion 15 upside down so that the top plate 5 contacts the installation surface F. Even when the inner bag 20 is heated together with the outer box 1 in this state, as shown in FIG. 10, the outer box 1 is bent along the fold lines 13 a and 13 b formed on the back plate 4. The inclination angle of the exterior box 1 (and the interior bag 20) with respect to the installation surface F can be sufficiently increased without falling with the exterior box 1.

  However, the support form shown in FIGS. 9 and 10 is unstable as compared with the support forms shown in FIGS. 7 and 8, and the tip portion 15 is easily tilted due to the expansion of the inner bag 20 and the rotation of the installation surface F. Accordingly, as shown in FIGS. 7 and 8, the front end portion 15 is folded back to the back plate 4 side via the hinge wire 9 and the inner bag 20 is supported in a state where the front end portion 15 is in contact with the back plate 4. Is preferred.

  FIG. 11 is a developed view of the outer packaging box 1 of the second embodiment constituting the packaging body 100 for a microwave oven of the present invention, and FIG. 12 shows a state in which the outer packaging box 1 of the second embodiment is assembled in the front plate 2. It is the perspective view seen from the side. In the present embodiment, the second fold lines 14a and 14b are formed of two creases extending from the vicinity of the opening line 10a of the front plate 2 in the direction of the lower side 2b (bottom plate 6). The second fold lines 14 a and 14 b are formed in a “C” shape in which the distance increases as the lower side 2 b of the front plate 2 is approached. The configuration of the other parts of the exterior box 1, the configuration of the interior bag 20 accommodated in the exterior box 1, and the support form of the interior bag 20 using the exterior box 1 are the same as in the first embodiment, and thus the description thereof is omitted. .

  FIG. 13: is the perspective view which looked at the state which supported the interior bag 20 in the exterior box 1 of 2nd Embodiment, and heated the exterior box 1 and the interior bag 20 from the opening 1a side. As shown in FIG. 13, the first fold lines 13 a and 13 b are formed on the back plate 4, and the second fold lines 14 a and 14 b are formed on the front plate 2. 4 bends along the first fold lines 13a and 13b, and the front plate 2 bends along the second fold lines 14a and 14b. As a result, the outer box 1 is more easily bent and deformed in the thickness direction (vertical direction) than the first embodiment. Accordingly, since both ends of the opening 1a of the outer box 1 are lifted more smoothly, the inclination angle of the inner bag 20 supported by the outer box 1 becomes sufficiently large, and the upper end of the inner bag 20 in which the ventilation portion 31 is formed. The part can be lifted more reliably.

  Further, when the outer box 1 is opened, when the pressing portion 12 (see FIG. 12) is pressed and a part of the opening line 10a is broken, the front plate 2 is bent along the second folding lines 14a and 14b. It becomes easy to insert a finger into the broken part. Therefore, the opening operability of the outer box 1 is also improved.

  Similarly to the first fold lines 13a and 13b, when the second fold lines 14a and 14b overlap the lower side 2b of the front plate 2 or the left and right side sides 2c and 2d (ridge lines of the outer box 1), the outer box 1 When assembling by folding, there is a possibility that the second folding lines 14a and 14b may be bent by mistake. Therefore, as in the present embodiment, the end points of the second fold lines 14a and 14b are set so that the second fold lines 14a and 14b do not overlap the ridge lines of the peripheral edge of the front plate 2 and the lower side 2b and the left and right sides of the front plate 2 It is preferable to keep away from the side edges 2c and 2d. Further, when the pressing portion 12 is pressed and a part of the opening line 10a is broken, the starting points of the second folding lines 14a and 14b are set so that the lower part of the opening line 10a of the front plate 2 is not bent more than necessary. It is preferable to keep away from the opening line 10a.

  In addition, here, the second folding lines 14a and 14b are formed in a “C” shape, but the front plate 2 is more flexible than the back plate 4 folded back by the hinge wire 9, and is therefore parallel to each other. Two second fold lines may be formed, or one second fold line may be formed in the center of the back plate 4. Alternatively, three or more second fold lines may be formed. The second fold lines 14a and 14b are not limited to creases, and may be formed by continuous perforations or half cut lines.

  FIG. 14 is a development view of the outer packaging box 1 of the third embodiment constituting the packaging body 100 for a microwave oven of the present invention, and FIG. 15 shows the rear panel 4 in a state where the outer packaging box 1 of the second embodiment is assembled. It is the perspective view seen from the side. In the present embodiment, a U-shaped cut 40 is formed in the middle of the first fold lines 13 a and 13 b formed in the back plate 4. The notch 40 is formed such that both ends of the U-shape are continuous with the first fold lines 13a and 13b, and the U-shaped convex sides face each other in a region sandwiched between the first fold lines 13a and 13b. ing. The structure of the other part of the exterior box 1 is the same as that of the second embodiment. The structure of the interior bag 20 accommodated in the exterior box 1 and the support form of the interior bag 20 using the exterior box 1 are the first and the second. Since it is the same as that of 2nd Embodiment, description is abbreviate | omitted.

  FIG. 16 is a side view showing a state where the inner bag 20 is supported by the outer box 1 of the third embodiment and the outer box 1 and the inner bag 20 are heated, and FIG. 17 shows the state of FIG. 16 on the opening 1a side. It is the perspective view seen from. When heating the outer box 1 and the inner bag 20, as shown in FIG. 7, the opening lines 10 a and 10 b of the outer box 1 are broken to expose the upper end portion of the inner bag 20, and the tip of the outer box 1 is exposed. 15 is folded back toward the back plate 4 along the hinge line 9. At this time, the cut 40 is opposed to the tip portion 15. In this state, the exterior box 1 containing the interior bag 20 is installed on the installation surface F in the microwave oven.

  When heating is started, the inner bag 20 expands, and as shown in FIGS. 16 and 17, the back plate 4 bends along the first fold lines 13a and 13b, and the front plate 2 has the second fold line 14a. , 14b. At this time, the portion surrounded by the cut 40 formed in the middle of the first fold lines 13 a and 13 b is cut and raised by the bending of the back plate 4, and becomes the leg portion 41 and abuts on the tip portion 15.

  Thereby, since the inclination angle of the outer packaging box 1 with respect to the installation surface F (the inclination angle of the inner bag 20 supported by the outer packaging box 1) is increased by the leg portion 41, the upper end of the inner bag 20 in which the ventilation portion 31 is formed. The part can be lifted larger. The notch 40 is not limited to a U-shape, and may be any convex shape that can be cut and raised from the back plate 4 to form the leg portion 41, such as a U-shape or a V-shape.

  As described above, the microwave oven packaging body 100 of the present invention has excellent characteristics such as handleability and manufacturability during cooking as a packaging material for retort food that is cooked in a microwave oven. It is possible to provide a microwave oven heating package 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 exterior box 1 shown in FIG. 3 is only a preferable example, and instead of the hinge line 9 in which the mountain-shaped cuts are continuous, the hinges are formed by perforations, half-cut lines, and stamped lines in which linear cuts are continuous. Line 9 can also be formed.

  Moreover, the laminated structure of the laminated film 21 shown in FIG. 6 can also be changed as appropriate. For example, in the above embodiment, the thermoplastic resin layer 37 is laminated on the intermediate layer 35 via the dry laminate layer, but the thermoplastic resin layer 37 may be directly laminated on the intermediate layer 35.

  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 packaging body for heating a microwave oven having a simple configuration and low cost 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 Exterior box 1a Opening 2 Front plate 3a, 3b Side plate 4 Back plate 5 Top plate 6 Bottom plate 9 Hinge wire 10a, 10b Opening wire 13a, 13b 1st folding line 14a, 14b 2nd folding line 15 Front end part 20 Inner bag 21 Laminated film 27 Contents 31 Ventilation part 40 Notch 41 Leg part 100 Packaging for heating microwave oven R Vent hole P Support point (contact part)
F Installation surface

Claims (10)

An exterior box of an interior bag for heating a microwave oven that stores an interior bag filled with contents that can be cooked by a microwave oven,
A rectangular tubular body composed of a rectangular front plate and a back plate facing each other, and two side plates connecting opposite sides of the front plate and the back plate, and the front plate or the back plate A top plate connected to the upper side of the face plate and sealing the upper end of the rectangular tube body, and a bottom plate connected to the lower side of the front plate or the back plate and sealing the lower end of the square tube body. Consists of
Positioned near the upper side of the substantially central portion of the back plate, a hinge line parallel to the top side of the back plate, and extending from one end of the hinge line toward the side of the back plate, the side plate and the front plate are An opening line that crosses and continues to the other end of the hinge line is parallel to each other and extends toward the lower side of the back plate starting from both ends of the hinge line, or the distance increases as the lower side of the back plate is approached. Two first fold lines;
Is formed. In the middle of each first fold line, both ends are connected to the first fold line, and convex cuts are formed in which the convex sides face each other in a region sandwiched between the first fold lines,
2. The cut according to claim 1, wherein when the opening line is broken and a tip including the top plate is folded back toward the back plate along the hinge line, the notch is opposed to the tip. Exterior box.   The exterior box according to claim 1 or 2, wherein an end point of the first folding line has a predetermined interval between a lower side and a side side of the back plate.   The exterior box according to any one of claims 1 to 3, wherein a second fold line extending in a lower side direction of the front plate is formed on the front plate in the vicinity of the opening line.   The exterior box according to claim 4, wherein two second fold lines are formed, and an interval between the second fold lines becomes wider as approaching a lower side of the back plate.   6. The exterior box according to claim 4, wherein an end point of the second fold line has a predetermined interval between a lower side and a side side of the front plate.   The exterior box according to any one of claims 4 to 6, wherein a start point of the second fold line has a predetermined distance from the opening line.   When the opening line is broken and the front end portion including the top plate is folded back to the back plate side along the hinge line, the contact portion between the back plate and the front end portion to the lower end portion of the exterior box 8. The exterior according to claim 1, wherein a dimension of the exterior is larger than ½ of a dimension from an upper end portion to a lower end portion of the exterior box before breaking the opening line. box. The exterior box according to any one of claims 1 to 8,
An interior bag that is stored in the exterior box and filled with contents;
With
Breaking the opening line, folding the tip including the top plate back to the back plate along the hinge line, and storing the interior bag in the exterior box with the back plate facing downward, A packaging for heating a microwave oven, supported by the bag with its upper end inclined obliquely upward.   The packaging body for heating a microwave oven according to claim 9, wherein a ventilation portion through which water vapor generated by heating the contents can pass is formed in the vicinity of the upper end portion of the interior bag.

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