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WO2008056690A1 - Corps d'emballage pour cuisson par un four à micro-onde - Google Patents

Corps d'emballage pour cuisson par un four à micro-onde Download PDF

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Publication number
WO2008056690A1
WO2008056690A1 PCT/JP2007/071612 JP2007071612W WO2008056690A1 WO 2008056690 A1 WO2008056690 A1 WO 2008056690A1 JP 2007071612 W JP2007071612 W JP 2007071612W WO 2008056690 A1 WO2008056690 A1 WO 2008056690A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
microwave oven
container
package
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2007/071612
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Hongou
Hisakazu Yasumuro
Kengo Matsumoto
Taketo Sakurai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Seikan Group Holdings Ltd
Original Assignee
Toyo Seikan Kaisha Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to JP2008543098A priority Critical patent/JP4924613B2/ja
Publication of WO2008056690A1 publication Critical patent/WO2008056690A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means

Definitions

  • the present invention relates to a microwave cooking packaging body in which a synthetic resin container body having a flange portion is filled with food such as cooked rice, and a lid body is heat-sealed and sealed to the flange portion.
  • various microwave oven packaging packages are known in which retort food, frozen food, and the like are stored in a synthetic resin sealed container and cooked in an microwave oven when eaten.
  • the internal pressure of the packages may increase due to water vapor generated from food stored in the container, and the packages may burst.
  • food is scattered, or soil the microwave oven, there is a fear force s harm burns or the like to the human body.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 62-235080
  • Patent Document 2 Japanese Patent Laid-Open No. 11 171261
  • Patent Document 3 Japanese Patent Laid-Open No. 2000-62858 [0005]
  • a sealing heat seal is applied, and then the entire circumference of the flange portion including the heat-sealed portion is provided.
  • knurled seal it is widely practiced to prevent the outer end of the heat-sealed lid from being turned up (for example, see Patent Document 4).
  • Patent Document 4 JP-A-3-29769
  • the steam seal portion is formed by providing the heat seal portion with a protruding portion that protrudes inward of the container.
  • the objective is to eliminate the problems peculiar to microwave oven packaging with knurled seals. That is, the present invention prevents a roll-up of the outer end of the lid body heat-sealed to the flange portion, and the microwave oven cooking package in which the lid body automatically opens due to an increase in pressure in the container during microwave cooking. We will make it easy to provide the body at low cost.
  • a microwave oven packaging body filled with the contents of a synthetic resin container body with a flange and heat sealed with a lid on the flange to seal the heat seal.
  • a steam vent seal is formed by providing an urging force and a protruding portion in the inner direction of the container, At least one auxiliary seal part is provided by heat-sealing the flange part and the lid body at the part from the steam release seal part to the outer edge of the container, and in areas other than the outer part and the inner part of the steam release seal part.
  • the feature is that an independent recess is provided on the inside and outside of the heat seal part of the flange part, which is the steam release seal part, to form a directional force and a protruding part in the inner direction of the container 1 or 2 Packaging for microwave oven according to 1.
  • auxiliary seal portion is formed as a spot-like spot seal.
  • the auxiliary seal portion is a seal portion that does not participate in the hermetic seal of the contents stored in the container.
  • the knurled seal is a seal in which the seal mark has a grid pattern, and the area ratio of the seal part to the non-seal part in the knurled part is about 1/9 to 6/4. .
  • the length of one side of the grid is about 0.3 to 1 mm and the pitch is about 0.7 to 1. Omm.
  • the knurled seal is applied under such a condition that the seal portion is sealed to such an extent that it does not peel off. For example, using a sheath tool such as that shown in Fig. 8, 170 to 240 ° C:;! To 3 less, seat surface pressure 10 to 40kg / It applied by heat-sealing in cm 2.
  • the present invention it is possible to prevent the outer end of the lid body of the microwave cooking packaging body from being turned up after the container body having the flange portion is filled with the contents and then the lid body is heat sealed. In the distribution / sales process, it is possible to prevent foreign matter from entering between the lid and the flange. In addition, when cooking with a microwave oven, the lid can surely automatically open from the steam vent seal portion due to the pressure increase in the container, and smooth discharge of steam via the steam vent seal portion can be realized. .
  • FIG. 1 is a plan view showing an example of a microwave oven cooking package according to the present invention.
  • FIG. 2 is a front view of the package of FIG.
  • FIG. 3 is a partially enlarged view of a protruding portion of a heat seal portion formed on a flange portion of the package of FIG. 1.
  • FIG. 4 is a schematic cross-sectional view taken along line AA of FIG. 3 when the package of FIG. 1 is cooked with a microwave oven.
  • FIG. 5 is a schematic cross-sectional view taken along the line BB of FIG. 3 when the package of FIG. 1 is cooked with a microwave oven.
  • FIG. 6 is a partially enlarged view of a flange portion forming a steam release seal portion before heat-sealing the lid in the package of FIG.
  • FIG. 7 is a partial enlarged view of a sealing tool used when heat-sealing the lid body to the flange portion of the container body.
  • FIG. 8 is a partially enlarged view of a sealing tool used when a knurled seal is applied to the flange portion of the microwave oven packaging body of the present invention.
  • FIG. 9 is a partially enlarged view of a steam vent seal part of a package showing another example of the microwave cooking package of the present invention.
  • Fig. 10 is a partially enlarged view of a steam vent seal portion of the package, showing another example of the microwave oven package of the present invention.
  • FIG. 11 is a schematic diagram showing another example of the microwave oven cooking package according to the present invention. It is the elements on larger scale of a blank seal part.
  • Fig. 12 is a partially enlarged view of a steam vent seal portion of the package, showing another example of the microwave cooking package of the present invention.
  • FIG. 13 is a plan view showing an example of a conventional microwave cooking package.
  • FIG. 14 is a plan view showing another example of the microwave oven cooking package of the present invention.
  • FIG. 15 is a front view of the package of FIG.
  • FIG. 16 is a partially enlarged view of a steam vent seal portion of a package, showing another example of the microwave cooking package of the present invention.
  • FIG. 17 is a partially enlarged view of a steam vent seal portion of a package, showing another example of the microwave oven package of the present invention.
  • FIG. 18 is a partially enlarged view of a steam vent seal portion of a package, showing another example of the microwave oven package of the present invention.
  • a plastic material having heat-sealing properties which is usually used for manufacturing packaging containers. It is.
  • plastic materials include single-layer films and sheets made of a thermoplastic resin having heat sealability, and multilayer films and sheets in which a thermoplastic resin having heat sealability is laminated with other thermoplastic resins. Etc.
  • plastic material having such heat sealability examples include known low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene ethylene copolymer, ethylene acetate butyl copolymer, Olefin resins such as olefin resins graft-modified with ethylenically unsaturated carboxylic acids or anhydrides thereof; polyamides or copolyamide resins having relatively low melting points or low softening points; polyesters or copolyester resins; polycarbonate resins, etc. are used.
  • the plastic material having such heat sealability include known low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene ethylene copolymer, ethylene acetate butyl copolymer, Olefin resins such as olefin resins graft-modified with ethylenically unsaturated carboxylic acids or anhydrides thereof; polyamides or copo
  • thermoplastic resin with or without heat sealability various barrier films, and an oxygen-absorbing resin are used. be able to.
  • thermoplastic resins examples include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene 1, crystalline poly-4-methylpentene 1, low-medium or high-density polyethylene, and ethylene acetate butyl copolymer (EVA).
  • Polyolefins such as EV A saponified product, ethylene ethyl acrylate copolymer (EEA), ionically cross-linked olefin copolymer (ionomer); aromatic butyl copolymers such as polystyrene and styrene butadiene copolymer; Halogenated butyl polymer such as vinylidene chloride resin; polyacrylic resin; nitrile polymer such as acrylonitrile-styrene copolymer, acrylonitrile-toluene styrene butadiene copolymer; polyethylene terephthalate, polytetramethylene terephthalate, etc.
  • ESA ethylene ethyl acrylate copolymer
  • ionomer ionically cross-linked olefin copolymer
  • aromatic butyl copolymers such as polystyrene and styrene butadiene cop
  • any film composed of a known thermoplastic resin having oxygen barrier properties can be used.
  • resins include, for example, ethylene butyl alcohol copolymer, polyamide, polyvinylidene chloride resin, poly butyl. Alcohol, fluororesin, etc. are listed, but they may not generate toxic gas during incineration! /, Does not contain chlorine! /, And it is preferable to use resin.
  • a particularly preferable oxygen barrier resin is an ethylene acetate butyl copolymer having an ethylene content of 20 to 60 mol%, particularly 25 to 50 mol%, and a saponification degree of 96 mol% or more, particularly 99 mol. % Of the saponified copolymer obtained by saponification such that the number of amide groups per 100 carbon atoms is 5-50, especially 6-20.
  • Polyamides in a range for example, nylon 6, nylon 6, 6, nylon 6/6, 6 copolymer, metaxylylene adipamide (MX6), nylon 6, 10, nylon 11, nylon 12, Nylon 13 etc. are mentioned.
  • barrier films can be used alone or in combination of two or more.
  • the oxygen-absorbing resin (1) a resin having an oxygen-absorbing property is used. And force S.
  • the thermoplastic resin constituting the oxygen-absorbing resin composition (2) any of a thermoplastic resin having an oxygen barrier property without limitation and a thermoplastic resin having no oxygen barrier property can be used.
  • the thermoplastic resin constituting the oxygen-absorbing resin composition (2) when the resin itself has an oxygen-absorbing property or oxygen-barrier property, a synergistic effect with the oxygen-absorbing effect by the oxygen-absorbing agent is caused. It is preferable because oxygen can be effectively prevented from entering the container.
  • Examples of the resin itself having oxygen absorptivity include those utilizing an oxidation reaction of the resin.
  • polybutadiene, polyisoprene, polypropylene, ethylene carbon monoxide copolymers; 6-nylon, 12-nylon, metaxylylenediamine (MX) for oxidizable organic materials such as polyamides such as nylon
  • MX metaxylylenediamine
  • organic acid salts containing transition metals such as cobalt, zinc, and copper
  • photosensitizers such as benzophenone, acetophenone, and ketones
  • any oxygen absorbent conventionally used for this kind of application can be used.
  • an oxygen absorbent that is reducible and that is substantially insoluble in water is preferred.
  • oxygen absorbers include reducing metal powders such as reducing iron, reducing zinc, and reducing tin powders; low metal oxides such as FeO and Fe 2 O;
  • Reducing metal compounds such as those containing as a main component one or a combination of two or more of iron carbide, potassium iron, iron carbonyl, ferrous hydroxide and the like.
  • oxygen absorber for example, iron oxide obtained in the steel manufacturing process is reduced with a coata, and the resulting sponge iron is pulverized and then subjected to finish reduction in hydrogen gas or decomposed ammonia gas. Reduced iron performed; reducing iron obtained by electrolytically depositing iron from an aqueous iron chloride solution obtained in the steel pickling step, and then performing final reduction after grinding.
  • oxygen absorbers may be used as required in alkali metal, alkaline earth metal hydroxide, carbonate, sulfite, thiosulfate, triphosphate, diphosphate, organic acid salt, halogenate. It can also be used in combination with an oxidation accelerator composed of an electrolyte such as an oxide, or an auxiliary agent such as activated carbon, activated alumina or activated clay. Particularly preferred examples of the oxidation accelerator include sodium chloride, calcium chloride, and combinations thereof.
  • the blending ratio of both is 99 to 80 parts by weight of reducing iron and an oxidation accelerator, with the total weight being 100 parts by weight;! To 20 parts by weight, reducing iron is preferably 98 to 90 parts by weight and oxidation accelerator 2 to 10 parts by weight.
  • oxygen absorbers include polymer compounds having a polyvalent phenol in the skeleton, such as a polyhydric phenol-containing phenol-aldehyde resin. Further, ascorbic acid, erythorbic acid, tocopherols and salts thereof, which are water-soluble substances, can be suitably used. Of these oxygen-absorbing substances, reduced iron and ascorbic acid compounds are particularly preferred.
  • a resin in which the above resin itself has oxygen absorbability may be blended in the thermoplastic resin as an oxygen absorbent.
  • oxygen absorbers generally have an average particle size of 50 m or less, particularly preferably 30 m or less.
  • the oxygen absorbent When the oxygen absorbent needs to be transparent or translucent, it preferably has an average particle size of 10 m or less, particularly 5 m or less.
  • the oxygen absorbent is preferably blended in the above resin in a proportion of 1 to 70% by weight, particularly 5 to 30% by weight.
  • Contents such as cooked rice filled in the container according to the present invention are deteriorated by germs, mold and oxygen, and the flavor tends to be lowered. Therefore, in the present invention, it is preferable to use a multilayer structure including various barrier films and an oxygen-absorbing resin layer as the constituent material of the container body and the lid. It is possible to intervene an adhesive layer between the layers constituting the laminate as necessary.
  • adhesives such as polyolefin adhesives modified with acid anhydrides such as maleic anhydride, polyurethane adhesives, and the like that are usually used as adhesives for laminates. Can also be used.
  • PP polypropylene
  • EVO ethylene butyl acetate copolymer saponified product
  • oxygen-absorbing resin layer for example, polyolefin containing reducing iron and oxidation accelerator
  • nylon (NY) / EVOH / PP system for example, in order from the outer layer side of the lid body, nylon (NY) / EVOH / PP system.
  • Polyethylene (PE) system composite material NY / EVO H / Linear Low Density Polyethylene (LLDPE); Evaporated Polyethylene Terephthalate (PET) / NY / PP System.
  • PE Composite Material Evaporated PET / NY / LLDPE; Evaporated PET / NY / Polybutylene Terephthalate ( ⁇ ) Resin Etc.
  • FIG. 1-7 is a figure which shows one example of the packaging body for microwave oven cooking of this invention.
  • FIG. 1 is a plan view of the packaging body
  • FIG. 2 is a front view of the packaging body
  • FIG. 3 is a partially enlarged view of the protruding portion of the heat seal portion formed on the flange portion of the packaging body.
  • FIG. 4 is a schematic cross-sectional view taken along the line in FIG. 3 when the package is cooked in a microwave oven.
  • Fig. 5 shows a schematic cross-sectional view along the shoreline of Fig. 3 when the package is cooked in a microwave oven.
  • FIG. 6 shows a partially enlarged view of the flange portion that forms the protruding portion of the steam release seal portion before heat sealing the lid.
  • FIG. 1 is a plan view of the packaging body
  • FIG. 2 is a front view of the packaging body
  • FIG. 3 is a partially enlarged view of the protruding portion of the heat seal portion formed on the flange portion of
  • FIG. 7 shows a partially enlarged view of a sealing tool used when heat-sealing the lid to the flange portion.
  • Fig. 8 shows a partially enlarged view of the sealing surface of the sealing tool used when the knurled seal is applied to the flange part where the lid is heat-sealed.
  • the microwave cooking packaging 1 includes a rectangular container body 3 having a flange 2 filled with food (not shown) such as cooked rice, and the lid 4 is heat-sealed to the flange 2. It is sealed.
  • the heat seal part 5 is sandwiched by a part of the flange part, and independent recesses 6 and 7 are provided on the inside and outside of the heat seal part 5, respectively.
  • a V-shaped protruding portion 8 is formed in the inner direction of the container to form a steam vent seal portion.
  • the flange portion 2 and the lid body 4 are heat-sealed in a dot shape in the concave portion 7 outside the steam release seal portion 8, thereby forming a single circular shape as an auxiliary seal portion.
  • the heat seal portion 5 is projected in a V shape toward the outside of the container, and the lid body 4 is opened after cooking by the microwave oven.
  • the opening portion 12 is formed.
  • knurling seals 13 and 13 are applied to the inside and outside of the heat seal portion 5 other than the outer recess 7 and the inner recess 6 of the steam release seal portion 8 to prevent the lid 4 from turning up. ing.
  • the knurled seal 13 is provided at a portion 14 from the opening 12 to the outer end of the container in order to make it easy to open the lid 4 from the opening 12 after being controlled by a microwave oven! /, What! /
  • the steam release seal portion 8 uses the sealing tool 10 shown in Fig. 7 by placing the lid body 4 on the container body 3 provided with the recesses 6 and 7 in the corner portion of the flange portion 2 shown in Fig. 6. Then, forming force S can be achieved by heat sealing.
  • the auxiliary seal portion 9 leaves a spot-like portion that is not partially recessed, and uses a sealing tool 10 with a flat sealing surface to remove the steam-sealed seal portion 8. Can be provided at the same time as forming S.
  • the concave portion 7 is subjected to the concave portion entirely without leaving the portion corresponding to the auxiliary seal portion 9, and the portion corresponding to the auxiliary seal portion 9 of the sealing tool 10 is partially raised to perform heat sealing.
  • the auxiliary seal portion 9 may be formed.
  • the cover 4 is sandwiched between the portion sandwiched between the recesses 6 and 7 of the flange portion (scheduled heat seal portion) and the sealing tool 10 and heat sealed, so that the protrusion 8 and the heat seal portion 5
  • the auxiliary seal portion 9 is formed at the same time. Therefore, unlike the conventional microwave cooking package, the protruding portion 8 can be formed without misalignment without the need for precise alignment when forming the protruding portion.
  • the depths of the recesses 6 and 7 provided in the flange portion 2 may be the same depth or different depths.
  • the depth of the recess is usually about 0.05 to 3 mm, particularly preferably about 0.1 to 0.5 mm.
  • the seal width of the protruding portion 8 can be the same as or narrower than that of the peripheral heat seal portion 5, and is preferably about 0.5 to 5 mm, particularly preferably about 1 to 3 mm.
  • the seal strength of the protruding portion 8 is preferably about 5 to 30 N / 15 mm. This place The combined seal strength means a value obtained by converting the seal width of the protrusion 8 into a width of 15 mm.
  • the auxiliary seal part 9 is also provided on the inner part 6 of the steam release seal part 8 in order to improve the sealing performance and the appearance of the package, which is not limited to the outer part 7 of the steam release seal part 8 alone. You can.
  • the auxiliary seal portion 9 is provided on the inner portion 6, it is preferable to minimize the size and number of seals so as not to hinder the discharge of steam.
  • the size of the auxiliary seal portion 9 can be appropriately selected according to the size of the container.
  • the diameter can be, for example, 5 mm or less, usually about 0.3 to 2 mm.
  • the total number thereof is 1 to about 10; preferably 5 or less.
  • the shape and arrangement of the auxiliary seal part can be arbitrarily selected from a circular shape, a triangular shape, a quadrangular shape, an opal shape, and the like, which are not particularly limited.
  • the auxiliary seal portion may be formed as a seal portion having a certain area.
  • the auxiliary seal portion may have a seal form similar to the knurled seal portion. Monkey.
  • the knurled seal 13 provided on the microwave oven packaging body is sealed by heat-sealing the flange portion 2 and the lid body 4 of the container body, and then a plurality of protrusions arranged in a grid pattern on the seal surface. It can be formed using a sealing tool 18 having a part 20 (see FIG. 8).
  • the size of the convex portion 20 can be appropriately selected according to the size of the container, but usually one side of the convex portion is about 0.3 to 1 mm and the pitch is about 0.7 to 1. It is preferably about 0 mm.
  • the position where the knurled seal 13 is provided is usually provided on the entire surface of the flange portion 2, that is, on the inner side and the outer side including the peripheral heat seal portion 5.
  • the knurled seal may be applied in a form in which the knurled seal may be applied to the entire surface of the flange portion 2 including the heat seal portion 5 or the heat seal portion 5 may be omitted.
  • a knurled seal may be provided only outside the heat seal portion 5.
  • the outer end of the lid body of the microwave oven cooking package 1, which is sealed by heat-sealing the lid body 4 to the flange portion 2, is prevented from turning up. As a result, it is possible to prevent foreign matter from entering between the lid 4 and the flange 2 in the distribution / sales process.
  • the microwave cooking package 1 was cooked in a microwave oven, it was filled in a container.
  • the internal pressure of the container rises due to water vapor generated from food such as cooked rice, and the lid 4 expands outward.
  • the heat seal portion starts to peel from the tip portion protruding in a U-shape or V-shape toward the inside of the container (see FIG. 4).
  • the heat seal part 5 does not peel at other parts of the heat seal part 5, the internal pressure of the container is maintained, and the food such as cooked rice filled in the container is sufficiently steamed to improve the taste. To do.
  • the heat seal portion opens. Then, high-temperature steam blows out from the opening, and the internal pressure in the container is lowered, and cooking of the contents is completed.
  • the package body can be taken out of the microwave oven, and the lid body 4 can be opened by hand from the opening portion 12 provided at the corner portion facing the protruding portion 8, and the contents can be eaten as it is.
  • high-temperature water vapor is blown out from the projecting portion 8 that is opened.
  • the lid 4 can be safely opened.
  • the package for microwave oven cooking according to the present invention can maintain the internal pressure of the container to some extent during the protrusion 8 until the internal pressure of the container decreases after the heat seal part automatically opens. The contents can be given a sufficient steaming effect.
  • Fig. 9 is a partially enlarged view of a steam release seal portion of the package, showing another example of the microwave cooking package of the present invention.
  • Fig. 10 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave oven package of the present invention.
  • a total of ten small spot-like auxiliary seal portions 9 are provided in the concave portion 7 outside the steam release seal portion 8.
  • the other structure of the package 21 is the same as that of the package 1 in FIG.
  • FIG. 11 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave oven package of the present invention.
  • the microwave oven cooking packaging 31 one slightly deformed oval auxiliary seal portion 9 is provided in the concave portion 7 outside the steam release seal portion 8.
  • Other configurations of the package 31 are the same as those of the package 1 in FIG.
  • FIG. 12 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave cooking package of the present invention.
  • auxiliary seal 9 is provided in the recess 7 outside the steam release seal 8, and two ellipses are also provided in the recess 6 inside the steam release seal 8. Auxiliary seals 9 and 9 are provided.
  • Other configurations of the package 41 are the same as those of the package 1 in FIG.
  • FIG. 13 is a plan view showing an example of a conventional microwave cooking package.
  • a V-shaped protruding portion 8 directed toward the inner side of the container is formed in the heat seal portion 5 to form a steam release seal portion.
  • the heat seal portion 5 is projected in a V shape toward the outer side of the container, and an opening portion for opening the lid 4 after cooking with a microwave oven. 12 is formed.
  • the knurled seals 13 and 13 are applied to the inner and outer sides of the heat seal portion 5 over the entire circumference to prevent the lid body 4 from turning up.
  • This knurled seal 13 is provided on a portion 14 extending from the opening 12 to the outer end of the container in order to make it easy to open the lid 4 from the opening 12 after the package 51 is cooked in a microwave oven. Is not provided.
  • FIG. 14 and FIG. 15 are diagrams showing another example of the microwave oven cooking package according to the present invention.
  • FIG. 14 is a plan view of the package
  • FIG. 15 is a front view of the package.
  • This microwave oven cooking packaging body 61 has a cup-shaped container body 3 having a flange portion 2 with a circular cross section filled with food (not shown) such as cooked rice, and the lid portion 4 is attached to the flange portion 2 with a heat sheet. And sealed.
  • the flange portion 2 is provided with a pair of wide portions 3 2 and 33 at opposing positions.
  • One wide portion 32 is provided with recesses 6 and 7 sandwiching the heat seal portion 5 so that the heat seal portion 5 is provided with a V-shaped protruding portion 8 in the direction toward the inside of the container, and a steam release seal. Part 8 is formed.
  • one circular auxiliary seal portion 9 is provided in the concave portion 7 outside the steam release seal portion 8.
  • the heat seal portion 5 protrudes in a V shape toward the outer side of the container, thereby forming an opening portion 12 for opening the lid 4.
  • Fig. 16 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave oven package of the present invention.
  • a substantially triangular auxiliary seal portion 9 is provided in a recess 7 on the outer side of the steam release seal portion 8 so as to be separated from the heat seal portion 5 and the knurled seal portion 13. It is.
  • Other configurations of the package 71 are the same as those of the package 1 in FIG.
  • the heat seal part 5 Open. High-temperature water vapor blows out from the opening, and is discharged outside the container using the recess 7 as a passage.
  • the auxiliary seal portion 9 can be formed simultaneously with the knurled seal portion 13. The shape and size of the auxiliary seal portion 9 can be appropriately selected according to the size of the container.
  • FIG. 17 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave oven package of the present invention.
  • auxiliary seal portions 9, 9 are connected to the heat seal portion 5 in the concave portion 7 outside the steam release seal portion 8.
  • Other configurations of the package 81 are the same as those of the package 1 shown in FIG.
  • FIG. 18 is a partially enlarged view of the steam release seal portion of the package, showing another example of the microwave oven package of the present invention.
  • auxiliary seal portions 9, 9 are connected to the heat seal portion 5 and the outer knurled seal portion 13 in the concave portion 7 outside the steam release seal portion 8. is there.
  • Other configurations of the package 81 are the same as those of the package 1 in FIG.
  • a container main body and a cover body can be manufactured by a conventional method.
  • a method for forming the container body vacuum forming, pressure forming, vacuum / pressure forming, injection molding, or the like can be employed.
  • an outer layer of polypropylene resin (thickness 350,1 m) / titanium white pigment added to polypropylene with a melt index (Ml) 0.5 ⁇ 5 / adhesive layer made of maleic anhydride-modified polypropylene (thickness 20 m) / Barrier made of ethylene butyl alcohol copolymer (thickness 60 m) / Same adhesive layer (thickness 20 m) as above / Polypropylene resin inner layer (thickness 350 m) with MI 0.5, A multilayer sheet of 3 types and 5 layers with a total thickness of 0.8 mm was produced by ordinary coextrusion molding.
  • a square container with a flange having the shape shown in Fig. 1 and having an outer dimension of 156 mm x 133 mm and a height of 29 mm (inner volume of about 340 ml) was formed by a normal vacuum / pressure forming machine ( (Flange width: straight line 8mm, corner maximum 17mm).
  • Flange width straight line 8mm, corner maximum 17mm.
  • independent recesses 6 and 7 having a depth of 0.5 mm are formed on the inside and outside of the part corresponding to the heat seal part with the lid at the time of molding.
  • a circular spot-like portion having a diameter of 3 mm was left in the outer concave portion 7 and the concave portion was not partially processed.
  • a 12- ⁇ biaxially stretched polyester film (outer layer), a 15 m thick biaxially stretched nylon film (intermediate layer), and a 50 ⁇ m thick ethylene / propylene composite material
  • a film (inner layer) was used, and a polyurethane adhesive was interposed between each resin layer, and a laminate was formed by dry lamination to form a lid material according to the following procedure.
  • the adhesive layer and the intermediate layer material that are in a sticky state are bonded together, and after crimping with a heated metal roll and a rubber roll, the cooled metal roll is passed through and wound up.
  • the inner layer material was bonded to this laminate, and cut into a desired size to form a lid.
  • Example 1 as shown in FIG. 12, except that a total of three spot-like auxiliary seal portions 9 were provided on the outer side 7 and the inner side 6 of the steam release seal portion 8 to form a square container.
  • the container was filled and sealed with 200 g of sterile cooked rice to obtain a microwave cooking package.
  • Example 1 as shown in FIG. 16, except that a substantially triangular auxiliary seal part 9 is provided in the outer recessed part 7 of the steam release seal part 8 to form a square container, the same as in Example 1. Similarly, 200 g of sterile cooked rice was filled and sealed in a container to obtain a microwave cooking packaging.
  • Example 1 as shown in FIG. 17, except that a square container is formed by providing two auxiliary seal portions 9 and 9 connected to the heat seal portion 5 in the recess 7 outside the steam release seal portion 8. As in Example 1, the container was filled and sealed with 200 g of sterile cooked rice. A package for cooking the child range was obtained.
  • the lid 4 is heat-sealed to the flange 2 without forming an auxiliary seal on the outside of the steam release seal 8, and then the flange 2 except for the outer 14 of the opening 12
  • a package for microwave oven cooking was obtained in the same manner as in Example 1 except that 200 g of sterile cooked rice was filled and sealed in a container, except that a knurled seal was applied over the entire circumference.
  • Table 10 shows the results of checking the presence or absence of breakage of the seals by dropping each of the 10 packagings 10 times in succession from 120 cm in a 5 ° C atmosphere and by dropping them 10 times.
  • the seal strength (average value) measured from the inner side of the peripheral seal portion 5 by the following method was 18 N / 15 mm. Further, the opening strength (average value) measured from the outside of the opening sealing portion 12 was! /, And the deviation was 12 N / cup.
  • the container was fixed to the container holder, and the lid was cut to 15 mm width on both sides of the seal part.
  • the lid of the inner part of the container was fixed to the chuck of the tensile tester, and the maximum load was measured by pulling upward in the 90 ° direction at a speed of 300 mm / min.
  • the container sealing surface was tilted 45 ° and fixed to the container holder, and the lid of the outer protrusion corresponding to the opening was fixed to the chuck, and the maximum load was measured by pulling upward at the same speed as above.
  • the sealing property can be maintained until the steam is removed, compared to the conventional microwave oven heating after peeling off the lid, so that the steaming effect of the cooked rice The taste was improved.
  • the package of Comparative Example 1 does not provide an auxiliary seal part at least outside the steam release seal part, and provides a knurled seal over the entire circumference inside and outside the peripheral heat seal part, including the inside and outside of the steam release seal part. It has been applied.
  • steam with a position force other than the steam vent seal part escapes due to heating in the microwave oven, or steam does not escape within a predetermined time.
  • the steam escape was slow, the deformation of the container was difficult to return.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)

Abstract

L'invention concerne un corps d'emballage pour cuisson par un four à micro-onde, le corps d'emballage comprenant un corps principal de contenant en résine synthétique avec une partie de bride, le corps principal de contenant ayant des contenus emballés dans celui-ci, et un élément de couvercle thermoscellé à la partie de bride de façon à obtenir un scellement hermétique, une partie en saillie vers l'intérieur du contenant étant disposée sur la zone thermoscellée pour créer de cette façon une zone d'étanchéité à libération de vapeur, et, au site s'étendant de la zone d'étanchéité à libération de vapeur à une partie de bord extérieur du contenant, la partie de bride et l'élément de couvercle étant thermoscellés l'un à l'autre pour fournir de cette façon au moins une zone d'étanchéité auxiliaire, et un joint moleté étant disposé sur les sites autres que le site extérieur et le site intérieur de la zone d'étanchéité à libération de vapeur. Par conséquent, on peut préparer à faible coût un corps d'emballage pour cuisson par un four à micro-onde, apte à empêcher un gondolage vers le haut de la partie de bord extérieur de l'élément de couvercle thermoscellé à la partie de bride et à réaliser une ouverture automatique sûre de l'élément de couvercle par une augmentation de pression à l'intérieur du contenant lors de la cuisson par le four à micro-onde.
PCT/JP2007/071612 2006-11-10 2007-11-07 Corps d'emballage pour cuisson par un four à micro-onde Ceased WO2008056690A1 (fr)

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JP2010023851A (ja) * 2008-07-16 2010-02-04 Toyo Seikan Kaisha Ltd 電子レンジ調理用包装体
JPWO2008056690A1 (ja) * 2006-11-10 2010-02-25 東洋製罐株式会社 電子レンジ調理用包装体
DE102009018489A1 (de) * 2009-04-22 2010-10-28 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Verpackung, insbesondere Mikrowellen-Verpackungsbeutel, mit Druckausgleichsventil mit variablen Strömungsquerschnitt
JP2013052892A (ja) * 2011-09-02 2013-03-21 Dainippon Printing Co Ltd 加熱用容器及びそれに用いる蓋材
JP2015155319A (ja) * 2014-02-20 2015-08-27 福岡丸本株式会社 包装容器
JP2016069005A (ja) * 2014-09-30 2016-05-09 キョーラク株式会社 電子レンジ用容器
JP2016069004A (ja) * 2014-09-30 2016-05-09 キョーラク株式会社 電子レンジ用容器
WO2016163428A1 (fr) * 2015-04-06 2016-10-13 キョーラク株式会社 Récipient pour fours à micro-ondes
CN106043963A (zh) * 2015-04-06 2016-10-26 京洛株式会社 微波炉用容器
JP2017137099A (ja) * 2016-02-04 2017-08-10 大日本印刷株式会社 蓋付容器
WO2017169964A1 (fr) * 2016-03-31 2017-10-05 キョーラク株式会社 Récipient pour four à micro-ondes
JP2017178331A (ja) * 2016-03-29 2017-10-05 東罐興業株式会社 容器および容器の製造方法
JP2018016328A (ja) * 2016-07-26 2018-02-01 フジフーズ株式会社 食品包装容器の二重シール密封方法および食品包装容器
US20180037393A1 (en) * 2007-05-10 2018-02-08 The Hillshire Brands Company Moisture degraded packaging seal
EP3202687A4 (fr) * 2014-09-30 2018-06-13 Kyoraku Co., Ltd. Récipient pour four à micro-ondes
US20180273277A1 (en) * 2010-11-10 2018-09-27 The Hillshire Brands Company Packaged food with moisture release
JP2019006507A (ja) * 2018-10-18 2019-01-17 キョーラク株式会社 電子レンジ用容器
CN109264175A (zh) * 2018-10-18 2019-01-25 泉州梅洋塑胶五金制品有限公司 一种食品包装容器的自动泄压密封盖
WO2019088082A1 (fr) * 2017-10-31 2019-05-09 出光ユニテック株式会社 Récipient
JP2019081584A (ja) * 2017-10-31 2019-05-30 出光ユニテック株式会社 容器
JP2019081583A (ja) * 2017-10-31 2019-05-30 出光ユニテック株式会社 容器
US20220242648A1 (en) * 2010-11-10 2022-08-04 The Hillshire Brands Company Packaged food with moisture release
JP2022180030A (ja) * 2021-05-24 2022-12-06 凸版印刷株式会社 包装体
KR20230167498A (ko) * 2022-06-02 2023-12-11 주식회사 아워홈 첨단부가 형성된 증기배출 용기
US12134509B2 (en) 2019-01-25 2024-11-05 Cj Cheiljedang Corporation Container for retort food

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JPWO2008056690A1 (ja) * 2006-11-10 2010-02-25 東洋製罐株式会社 電子レンジ調理用包装体
US20180037393A1 (en) * 2007-05-10 2018-02-08 The Hillshire Brands Company Moisture degraded packaging seal
JP2010023851A (ja) * 2008-07-16 2010-02-04 Toyo Seikan Kaisha Ltd 電子レンジ調理用包装体
DE102009018489A1 (de) * 2009-04-22 2010-10-28 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Verpackung, insbesondere Mikrowellen-Verpackungsbeutel, mit Druckausgleichsventil mit variablen Strömungsquerschnitt
US20220242648A1 (en) * 2010-11-10 2022-08-04 The Hillshire Brands Company Packaged food with moisture release
US20180273277A1 (en) * 2010-11-10 2018-09-27 The Hillshire Brands Company Packaged food with moisture release
JP2013052892A (ja) * 2011-09-02 2013-03-21 Dainippon Printing Co Ltd 加熱用容器及びそれに用いる蓋材
JP2015155319A (ja) * 2014-02-20 2015-08-27 福岡丸本株式会社 包装容器
US10717585B2 (en) 2014-09-30 2020-07-21 Kyoraku Co., Ltd. Container for microwave oven
US11447324B2 (en) 2014-09-30 2022-09-20 Kyoraku Co., Ltd. Container for microwave oven
JP2016069005A (ja) * 2014-09-30 2016-05-09 キョーラク株式会社 電子レンジ用容器
JP2016069004A (ja) * 2014-09-30 2016-05-09 キョーラク株式会社 電子レンジ用容器
EP3572351A1 (fr) * 2014-09-30 2019-11-27 Kyoraku Co., Ltd. Récipient de four à micro-ondes
EP3202687A4 (fr) * 2014-09-30 2018-06-13 Kyoraku Co., Ltd. Récipient pour four à micro-ondes
CN106043963B (zh) * 2015-04-06 2020-06-23 京洛株式会社 微波炉用容器
CN106043963A (zh) * 2015-04-06 2016-10-26 京洛株式会社 微波炉用容器
WO2016163428A1 (fr) * 2015-04-06 2016-10-13 キョーラク株式会社 Récipient pour fours à micro-ondes
JP7348655B2 (ja) 2015-04-06 2023-09-21 キョーラク株式会社 電子レンジ用容器及びその製造方法、シールヘッド
JP2016196329A (ja) * 2015-04-06 2016-11-24 キョーラク株式会社 電子レンジ用容器
JP2020090328A (ja) * 2015-04-06 2020-06-11 キョーラク株式会社 電子レンジ用容器及びその製造方法、シールヘッド
JP2017137099A (ja) * 2016-02-04 2017-08-10 大日本印刷株式会社 蓋付容器
JP2017178331A (ja) * 2016-03-29 2017-10-05 東罐興業株式会社 容器および容器の製造方法
JP2017178430A (ja) * 2016-03-31 2017-10-05 キョーラク株式会社 電子レンジ用容器
TWI634059B (zh) * 2016-03-31 2018-09-01 京洛股份有限公司 Microwave container
WO2017169964A1 (fr) * 2016-03-31 2017-10-05 キョーラク株式会社 Récipient pour four à micro-ondes
JP2018016328A (ja) * 2016-07-26 2018-02-01 フジフーズ株式会社 食品包装容器の二重シール密封方法および食品包装容器
JP7188878B2 (ja) 2017-10-31 2022-12-13 出光ユニテック株式会社 容器
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JP7137919B2 (ja) 2017-10-31 2022-09-15 出光ユニテック株式会社 容器
WO2019088082A1 (fr) * 2017-10-31 2019-05-09 出光ユニテック株式会社 Récipient
CN109264175A (zh) * 2018-10-18 2019-01-25 泉州梅洋塑胶五金制品有限公司 一种食品包装容器的自动泄压密封盖
JP2019006507A (ja) * 2018-10-18 2019-01-17 キョーラク株式会社 電子レンジ用容器
US12134509B2 (en) 2019-01-25 2024-11-05 Cj Cheiljedang Corporation Container for retort food
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