WO2024034510A1 - Corps de sac de conservation d'aliments congelés et son procédé de production - Google Patents

Corps de sac de conservation d'aliments congelés et son procédé de production Download PDF

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Publication number
WO2024034510A1
WO2024034510A1 PCT/JP2023/028399 JP2023028399W WO2024034510A1 WO 2024034510 A1 WO2024034510 A1 WO 2024034510A1 JP 2023028399 W JP2023028399 W JP 2023028399W WO 2024034510 A1 WO2024034510 A1 WO 2024034510A1
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WIPO (PCT)
Prior art keywords
dot
bag
joints
frozen food
weakened
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PCT/JP2023/028399
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English (en)
Japanese (ja)
Inventor
徹 渡辺
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株式会社Ｗ
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Filing date
Publication date
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Publication of WO2024034510A1 publication Critical patent/WO2024034510A1/fr

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    • 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

Definitions

  • the present invention relates to a bag for storing frozen food and a method for manufacturing the same, and more particularly to a bag for storing frozen food that stores and preserves cooked frozen food, and a method for manufacturing the same.
  • Patent Document 1 a method has been proposed in which fine holes are provided in the bag and the generated water vapor is released outside the bag.
  • Patent Documents 2 to 4 a technique has been proposed in which a weak seal is provided in a part of the bag and the weak seal is peeled off during heating in a microwave oven to form a gas vent path.
  • Patent Document 1 the fine pores need to be sufficiently small to prevent foreign matter from entering, and it may be difficult to sufficiently release water vapor.
  • Patent Documents 2 to 4 it is possible to obtain a bag in which foreign matter is prevented from entering, and a weakly sealed portion peels off when heated in a microwave oven to form a ventilation path.
  • the present invention was made in view of these points, and although it has a simple structure, it reliably peels off when heated in a microwave oven to form a degassing passage, and does not peel off during transportation or storage.
  • An object of the present invention is to provide a bag body having a section.
  • the present invention was made in view of these points, and although it has a simple structure, it reliably peels off when heated in a microwave oven to form a degassing passage, and does not peel off during transportation or storage.
  • An object of the present invention is to provide a method for manufacturing a bag having a section.
  • a frozen food storage bag for storing cooked frozen food
  • the bag body is formed of a film,
  • the bag has at least one end portion a joint where the films are overlapped and joined to seal the inside of the bag;
  • a weakened part having a lower bonding strength than other parts of the joint is provided in a part of the joint so as to cross the joint in a direction from the inside of the bag to the outside,
  • the stacked films are interconnected only by a plurality of dot-like joints;
  • the plurality of dot-like joints are arranged over the entire width of the weakened portion such that the peel strength of a portion of the weakened portion located on the inside side of the bag is lower than the peel strength of other portions of the weakened portion.
  • the plurality of dot-like joints are arranged such that a portion of the region covered by the plurality of dot-like joints facing the internal space of the bag tapers toward the inside of the bag. .
  • the plurality of dot-like joints are arranged such that the area covered by the plurality of dot-like joints has a shape that tapers toward the inside of the bag body.
  • the plurality of dot-like joints are arranged so that the region covered by the plurality of dot-like joints has a substantially V-shape that tapers toward the inside of the bag.
  • the plurality of dot-like joints are arranged in at least a portion of the weakened portion so that the number of the weakened portions in the width direction increases from the inside to the outside of the bag.
  • the widthwise position of the dot-like joint within the weakened portion is located between two dot-like joints that are adjacent to the dot-like joint in the outer direction of the bag body and lined up in the width direction of the weakened portion. It is arranged so that
  • the dot-like joints form a row extending in the width direction of the weakened portion, and the rows are arranged from the inside of the bag toward the outside.
  • the bonding strength of the bonded portion adjacent to the weakened portion is set higher than the bonding strength of other portions of the bonded portion.
  • the weakened portions are provided at two opposite ends of the bag, respectively.
  • the dimensions of the dot-like joints are 0.1 mm or more and 1 mm or less.
  • the bag has a rectangular shape with a length in the vertical direction of 10 cm or more and 60 cm or less, and a length in the horizontal direction of 10 cm or more and 40 cm or less,
  • the band-shaped joint has a width of 0.2 mm or more and 20 mm or less,
  • the length of the weakened portion along the band-like joint is 10 mm or more and 60 mm or less.
  • a method for manufacturing a bag for storing frozen food is provided.
  • a frozen food for storage is provided in which a cooked frozen food of 100 g or more and 1000 g or less is stored in the bag.
  • a bag having a weakened portion that has a simple structure, but which reliably peels off when heated in a microwave oven and does not peel off during transportation or storage.
  • a method for producing a bag having a weakened portion that has a simple structure but that peels off reliably when heated in a microwave oven to form a degassing passage and does not peel off during transportation or storage. is provided.
  • FIG. 1 is a schematic plan view of a bag for storing frozen food according to a preferred embodiment of the present invention. It is a typical drawing for demonstrating the specific structure of a weakened part. It is a typical drawing for explaining the modification of a weakened part. It is a typical drawing for explaining the modification of a weakened part. 1 is a schematic drawing showing the configuration of an ultrasonic bonding machine used in the ultrasonic bonding machine.
  • FIG. 2 is a perspective view schematically showing the configuration of an anvil used in an ultrasonic bonding machine.
  • cooked frozen foods refer to frozen cooked foods such as dumplings, shumai, and fried chicken. Such frozen foods do not require any further cooking and can be eaten by simply heating them in a microwave oven.
  • frozen food for preservation refers to cooked frozen food stored in a bag together with a plastic tray or the like as required.
  • the frozen food storage bag is a bag that stores cooked frozen food for frozen storage.
  • FIG. 1 is a schematic plan view of a bag 10 for storing frozen food according to a preferred embodiment of the present invention.
  • the bag 10 is made by folding a horizontally long rectangular film 12 in two along the center line in the width direction, with a top seal part 14 (joint part) at the top and a bottom seal part 16 at the bottom. , is formed by sealing the side portions where the ends of the films are overlapped with each other with side seal portions 18.
  • the film used for the film 12 is preferably one that can be ultrasonically bonded, and may be a film made of polyethylene, polypropylene, polystyrene, acrylic resin, polyvinyl chloride, polyvinylidene chloride, polycarbonate, styrene-acrylonitrile copolymer, or a laminate of these. Examples include films that Furthermore, bondable papers can also be used as films.
  • the thickness of the film 12 is preferably 15 ⁇ m or more and 150 ⁇ m or less, more preferably 20 ⁇ m or more and 100 ⁇ m or less. If the film thickness is less than 15 ⁇ m, the strength of the bag may be insufficient, and if it exceeds 150 ⁇ m, it may be disadvantageous in terms of cost.
  • the film may be transparent or opaque, but it is preferable to use an opaque packaging film to prevent the contents from deteriorating due to sunlight. It may also be a film whose surface is printed to enhance its design.
  • one weakened part 20 is provided in a part of the top seal part 14 by partially cutting off the top seal part 14 extending along the upper end of the bag 10. .
  • This weakened portion 20 has a lower peel strength per unit area between the films 12 than other portions of the top seal portion 14, and is configured such that the films are peeled off with a lower force than other portions of the top seal portion 14. has been done.
  • the weakened portion 20 is provided to extend across the top seal portion 14 from the inside to the outside of the bag body 10, so that when the bonded film 12 is peeled off at the weakened portion 20, the bag A gas vent passage is formed that communicates the inside and outside of the body 10.
  • the weakened portion 20 causes the films 12 to separate from each other due to internal pressure generated by water vapor generated by the food, etc.
  • a degassing passage that communicates the inside and outside of the bag 10 is formed in the top seal portion 14.
  • one weakened part 20 is provided in the top seal part 14, but in the bag of the present invention, at least one weakened part is provided in at least one seal part. Good.
  • a configuration may be adopted in which each of the top seal portion 14 and the bottom seal portion 16 is provided with one weakened portion 20. The number and location of the weakened parts are determined as appropriate, taking into consideration conditions such as how much internal pressure is generated during heating with a microwave oven or the like.
  • the width of the top seal portion 14 in which the weakened portion 20 is formed (the length in the inner and outer directions of the bag body 10) is preferably 0.2 mm or more and 20 mm or less, and more preferably 0.3 mm or more and 10 mm or less. If it is less than 0.2 mm, the bonding strength may be insufficient, and if it exceeds 20 mm, it may be undesirable in terms of design or processing.
  • the tip portion 22 of the top seal portion 14 adjacent to the weakened portion 20, where the weakened portion 20 is formed may have a higher bonding strength than other portions of the seal portion.
  • the width of the tip portion 22 of the top seal portion 14 adjacent to the weakened portion 20 (the length in the X direction in FIG. 1) is set to be larger than the width of other portions of the top seal portion 14.
  • FIG. 2 is a schematic drawing for explaining the specific configuration of the weakening section 20.
  • the weakened portion 20 has a function of forming an exhaust passage by peeling off the connected film 12 when water vapor or the like is generated within the bag body 10 and the pressure increases due to heating in a microwave oven or the like. It is equipped with In order to exhibit such a function, the weakened portion 20 is configured such that the peel strength of the portion located inside the bag (in this embodiment, the innermost portion) is lower than the peel strength of other portions of the weakened portion. has been done.
  • the weakened portion 20 of the bag 10 of this embodiment extends across the top seal portion 14 in the seal width direction (direction from the inside to the outside of the bag 10).
  • the two stacked films 12 are connected only by a plurality of dot-like joints 24 that join the two films 12 in a dotted manner.
  • the plurality of dot-like joints 24 extend from the inside of the bag 10 to the outside in the width direction of the top seal part 14 (X direction in FIG. 1), and in the width direction (Y direction in FIG. 1) of the weakened part 20. They are distributed over the entire width of the weakened portion 20 (the entire length in the Y direction in FIG. 1) so that the number of the weakened portions 20 increases.
  • the length (width) of the weakened portion 20 in the Y direction is set to 10 mm or more and 60 mm or less. If the length (width) of the weakened part 20 is less than 10 m, it may not be possible to sufficiently discharge the generated water vapor, and if it exceeds 60 mm, the water vapor discharge part may not be completely peeled off.
  • the length (width) of the weakened portion 20 in the Y direction is more preferably 12 mm or more and 45 mm or less, and even more preferably 15 mm or more and 50 mm or less.
  • FIG. 2 is an enlarged schematic diagram showing the weakened portion 20 of the bag 10 of FIG. 1.
  • the plurality of dot-shaped joints 24 approximately expand from the inside of the bag 10 toward the outside within the weakened portion 20. They are arranged in a V-shape. Each dot-shaped joint 24 has a circular dot shape with the same dimensions, and joins the stacked films 12 to each other.
  • the plurality of dot-like joints 24 are arranged such that the peel strength of the weakened portion 20 located at the innermost portion of the bag body 10 is lower than the peel strength of other portions of the weakened portion 20.
  • the dot-like joints 24 form a plurality of rows of dot-like joints 24 lined up in the width direction (Y direction) of the weakened portion 20. Rows of books are arranged from the inside of the bag 10 to the outside.
  • the number of dot-like joints constituting each of the plurality of rows increases from the inside of the bag to the outside (along the direction of arrow X) in the inside part of the bag body of the weakened part 20.
  • the dot-like joints 24 constituting each of the plurality of rows are arranged so as to be located outward in the width direction of the weakened portion 20 as they go from the inside of the bag to the outside.
  • the weakened portion 20 of the bag 10 of this embodiment as shown in FIGS.
  • the bag 10 is arranged so that the portion facing the internal space tapers toward the inside of the bag 10.
  • the plurality of dot-like joints 24 have a generally V-shaped overall shape, with the area covered by the plurality of dot-like joints 24 tapering toward the inside of the bag body 10. It is arranged so that it forms.
  • a cooked frozen food for example, frozen shumai placed on the tray 26 is sealed in the bag 10 configured in this manner.
  • the plurality of dot-like joints 24 are arranged in a row in the width direction of the weakened portion 20 (direction of arrow Y in FIG. 1). Six rows are arranged from the inside to the outside of the bag body 10 as the first to sixth rows.
  • the first row is composed of one dot-like joint 24, and this one dot-like joint 24 is arranged at the innermost position of the bag body 10 at the center of the weakened part 20 in the width direction (Y direction). has been done.
  • the second row is composed of four dot-like joints 24 arranged at equal intervals, and these four dot-like joints 24 are arranged in the first row at the center position of the weakened part 20 in the width direction (Y direction). It is placed on the outside of the (bag body).
  • the second row is configured such that two central portions of the dot-like joints 24 constituting the second row are offset from the dot-like joints 24 of the first row in the X direction.
  • the dot-shaped joints 24 in the first row are arranged so that the positions in the width direction (Y direction) of the weakened portion 20 are adjacent to the outer side of the bag body 10 and lined up in the width direction of the weakened portion 20 at the center of the second row. It is arranged so as to be aligned in the X direction with the middle position of the two dot-like joints 24, 24.
  • the third row is composed of five dot-like joints 24 arranged at equal intervals, and these five dot-like joints 24 are arranged in the second row at the center position of the weakened part 20 in the width direction (Y direction). is placed outside.
  • the third row is configured such that each dot-like joint 24 is offset from the dot-like joint 24 of the second row in the X direction.
  • the dot-like joints 24 in the second row are arranged so that the width direction (Y direction) positions of the weakened portions 20 are adjacent to the outer side of the bag body 10 and lined up in the width direction of the weakened portions 20 in the third row. It is arranged so as to be aligned in the X direction with the middle position of the two dot-like joints 24, 24.
  • the fourth row is composed of eight dot-like joints 24 arranged at equal intervals, and these eight dot-like joints 24 are arranged in the third row at the center position of the weakened part 20 in the width direction (Y direction). is placed outside.
  • the fourth row is configured such that each dot-like joint 24 is offset from the dot-like joint 24 of the third row in the X direction.
  • the dot-like joints 24 in the third row are arranged so that the positions in the width direction (Y direction) of the weakened portions 20 are adjacent to the outer side of the bag body 10 and lined up in the width direction of the weakened portions 20 in the fourth row. It is arranged so as to be aligned in the X direction with the middle position of the two dot-like joints 24, 24.
  • the fifth row is constituted by two sets of four dot-like joints 24 arranged at equal intervals, each set including the outer two dot-like joints 24 of the fourth row of dot-like joints 24. It is arranged outside the fourth row so as to be located further outward in the width direction. Note that the fifth row is configured such that each dot-like joint 24 is offset from the dot-like joint 24 of the fourth row in the X direction. As a result, the two outer dot-like joints 24 in the fourth row are located adjacent to each other in the width direction (Y direction) of the weakened portion 20 in the outer direction of the bag body 10 and in the width direction of the weakened portion 20 in the fifth row. It is arranged so as to be aligned in the X direction with the middle position of the two dot-like joints 24, 24 lined up.
  • the sixth row is constituted by two sets of three equally spaced dot-like joints 24, each set having one outer dot-like joint 24 connected to the fifth row of dot-like joints 24. It is arranged at a widthwise position located further outward in the widthwise direction and outside of the fifth row. Note that the sixth row is configured such that each dot-like joint 24 is offset from the dot-like joint 24 of the fifth row in the X direction.
  • the two outer dot-shaped joints 24 in the fifth row are located adjacent to each other in the width direction (Y direction) of the weakened portion 20 in the outer direction of the bag body 10 and in the width direction of the weakened portion 20 in the sixth row. It is arranged so as to be aligned in the X direction with the middle position of the two dot-like joints 24, 24 lined up.
  • the peel strength of the first row (peel strength between stacked films), which is the portion of the weakened portion 20 located inside the bag body 10, is lower than the peel strength of other portions of the weakened portion 20.
  • the distance (Y-direction distance) between adjacent dot-like joints 24 in the same row is set to 0.5 mm or more and 2 mm or less.
  • this distance is more preferably 0.8 mm or more and 1.85 mm or less, and even more preferably 1 mm or more and 1.7 mm or less.
  • the distance between each row of the dot-like joints 24 is set to 0.5 mm or more and 1.5 mm or less.
  • this distance is more preferably 0.55 mm or more and 1.2 mm or less, and even more preferably 0.6 mm or more and 1.0 mm or less.
  • each dot-like joint is circular, but there is no particular restriction on the shape, and it may be square, irregular shape, or the like.
  • the size (diameter) of each circular dot-shaped joint 24 is set to 0.1 mm or more and 1 mm or less. This is because if the size of the dot-shaped joint portion 24 is less than 0.1 mm, the strength of the weakened portion 20 may become insufficient, and if it exceeds 1 mm, the discharge of water vapor may become insufficient.
  • this dimension is more preferably 0.15 mm or more and 0.58 mm or less, and even more preferably 0.2 mm or more and 0.6 mm or less.
  • the above dimensions are the length of the diagonal line if the dot-shaped joint is square, and the diameter of the smallest circumscribed circle if the dot-shaped joint is amorphous.
  • all the dot-shaped joint portions 24 have the same size and shape.
  • the present invention is not limited to this, and the sizes of the dot-like joints do not all need to be the same.
  • the size of the dot-like joints in the first row smaller than the size of the dot-like joints in the rear row, it is possible to obtain the effect that peeling becomes easier when heated in a microwave oven.
  • the number and arrangement of the dot-shaped joints 24 in the weakened portion are not limited to the above embodiments, and may be arranged as shown in FIGS. 3 and 4, for example.
  • the number of rows of the dot-like joints 24 is six in the bag 10 of the above embodiment, but preferably 2 or more and 10 or less. By having two or more rows of dot-like joints, it is possible to prevent the weakened parts from peeling off when the product is dropped or subjected to vibration during transportation or storage, and by having no more than 10 rows, , peeling becomes easier when heated in a microwave oven.
  • the number of rows of dot-like joints is more preferably 3 or more and 8 or less, and even more preferably 4 or more and 6 or less.
  • the number of dots in each row is preferably 1 or more and 16 or less, more preferably 1 or more and 12 or less. Although there is no particular restriction on the number of dots in each column, it is necessary that the number of dots in the first column is smaller than the number of dots in the other columns. By making the number of dots in the first row smaller than the number of dots in the other rows, it becomes easier to peel off when heated in a microwave oven.
  • the number of dot-like joints in the first row is preferably from 1 to 5, more preferably from 1 to 4, and even more preferably from 1 to 3.
  • the number of dot-like joints in the second and subsequent rows is not particularly limited, but is preferably 2 or more and 16 or less, more preferably 3 or more and 12 or less, and even more preferably 4 or more and 8 or less.
  • the dot-shaped joints By arranging the dot-shaped joints in this way, the weakened parts are prevented from peeling off when dropped or subjected to vibration during transportation or storage, and by arranging the dot-shaped joints in 10 rows or less, Peeling becomes easier when heated.
  • the dot-like joints do not necessarily have to be arranged in a row, and may be arranged so that the peel strength of the weakened part located on the inside of the bag is lower than that of other parts of the weakened part, for example.
  • the weakened portion may be arranged over the entire width of the weakened portion so that the portion of the area covered by the plurality of dot-shaped joints facing the internal space of the bag tapers toward the inside of the bag.
  • FIG. 5 is a schematic diagram showing the configuration of an ultrasonic bonding machine used in the ultrasonic bonding machine.
  • the ultrasonic bonding machine 50 includes an ultrasonic oscillator 52 that converts commercial electricity of 50 Hz or 60 Hz into a high frequency signal of approximately 15 to 70 KHz, a converter 54 that converts this signal into mechanical vibration, and a converter that amplifies this mechanical vibration.
  • a known basic configuration includes a booster 56 that transmits amplified vibrations to the welding target, a flat horn 58 that transmits amplified vibrations to the welding target, and a flat anvil 60 that sandwiches the films 12, 12 between the horn 58. This is an ultrasonic bonding machine with
  • the horn 58 used to manufacture the bag of this embodiment has a smooth surface
  • the anvil 60 has a surface with convex portions corresponding to the dot-like joints 24 as described later.
  • the length of the horn 58 and the anvil 60 is about 50 mm to 450 mm, and the width of the horn 58 and the anvil 60 is about 7 mm to 25 mm.
  • Horn 58 and anvil 60 are preferably made of known materials, particularly stainless steel or titanium alloy.
  • edges of the surfaces of the horn 58 and anvil 60 may be chamfered. By chamfering, it is possible to prevent the film 12 from being cut at this portion.
  • the anvil 60 is moved up and down by a drive device (not shown) to sandwich the two films 12 between it and the horn 58. In this state, ultrasonic waves are applied to the horn 58 to simultaneously form the top seal portion 14 and the weakened portion 20 on the bag body.
  • a pressure of about 20N to 500N is applied between the horn 58 and the anvil 60 by a pressure device (not shown).
  • the bonding time is preferably about 0.01 seconds or more and 10 seconds or less, more preferably 0.03 seconds or more and 5 seconds or less, and even more preferably 0.05 seconds or more and 3 seconds or less.
  • the bonding time is preferably about 0.01 seconds or more and 10 seconds or less, more preferably 0.03 seconds or more and 5 seconds or less, and even more preferably 0.05 seconds or more and 3 seconds or less.
  • FIG. 6 is a perspective view schematically showing the configuration of an anvil 60 used in the ultrasonic bonding machine 50.
  • the anvil 60 is of a flat plate type, and has rectangular convex portions 74, 74 corresponding to the top seal portion 14 of the bag body 10 and a plurality of protrusions 76 corresponding to the dot-shaped joint portions 24 arranged on the surface 62. There is.
  • the dimensions, shape, and arrangement of the convex portions 74, 74 and the protrusion 76 are set to be complementary to the dimensions, shape, and arrangement of the top seal portion 14 and dot-shaped joint portion 24 of the bag body 10.
  • the heights of the convex portions 74, 74 and the protrusion 76 are set to 0.2 mm or more and 1.0 mm or less. If the height of the convex parts 74, 74 and the protrusion 76 is less than 0.2 mm, the bonding strength between the top seal part 14 and the dot-shaped joint part 24 may be insufficient, and if it exceeds 1.0 mm, the film may be damaged at the edges. This is because it may break and fail to join properly.
  • the height of the convex portions 74, 74 and the protrusion 76 is more preferably 0.25 mm or more and 0.8 mm or less, and even more preferably 0.3 mm or more and 0.5 mm or less.
  • the cross-sectional shapes of the protrusions 74, 74 and the protrusions 76 are preferably rectangular, semicircular, or trapezoidal, but semicircular or trapezoidal are particularly preferable from the viewpoint of preventing the film from being cut at the edges.
  • the frozen food storage bag and frozen food according to a preferred embodiment of the present invention can be manufactured, for example, by the following method.
  • (1) Prepare the film.
  • (2) This film is folded in two and heat-sealed or ultrasonically bonded to form side seals.
  • (3) Furthermore, a bottom seal portion is formed.
  • a bag for storing frozen food is formed by the above method.
  • (5) Store the frozen food in the formed bag for storing frozen food.
  • a flat anvil having a surface with irregularities corresponding to the weakened portion is joined with an ultrasonic welding machine having a flat horn with a smooth surface to form a top seal portion having a weakened portion.
  • an ultrasonic welding machine having a flat horn with a smooth surface to form a top seal portion having a weakened portion.
  • a frozen food stored in a bag for storing frozen food having a weakened portion in the top seal portion is manufactured.
  • the frozen food storage bag and the method for manufacturing frozen food of the present invention are not limited to this, and for example, the number of water vapor discharge sections and the positions where they are provided can be changed as necessary.
  • steps (1) and (2) above are performed in one step, and steps (3) to (6) are repeated.
  • steps (3) to (6) are repeated.
  • a modification there is a method in which the top seal portion of a bag body and the bottom seal portion of an adjacent bag body are formed at the same time, and then the two bags are separated. In this case, (6) and (3) to the next bag will be performed at the same time.
  • Bag body 12 Bag body 12: Film 14: Top seal portion 16: Bottom seal portion 18: Side seal portion 20: Weakened portion 22: Tip portion of the top seal portion adjacent to the weakened portion 24: Dot-shaped joint portion 26: Tray

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

Abstract

L'invention concerne un corps de sac présentant une section affaiblie qui se détache de manière fiable pendant le chauffage par un four à micro-ondes pour former un passage de ventilation de gaz, mais qui ne se détache pas pendant le transport ou le stockage, tout en présentant une configuration simple.　La présente invention concerne un corps de sac de conservation d'aliments congelés (10) pour conserver des aliments congelés qui sont déjà cuits, le corps de sac étant formé à partir de films (12) ; le corps de sac comprend, au moins au niveau d'une section d'extrémité de celui-ci, une partie de jonction (14) au niveau de laquelle les films sont joints de façon à se chevaucher mutuellement et qui scelle l'intérieur du corps de sac ; une section affaiblie (20) qui présente une résistance de jonction inférieure à celle d'autres parties de la partie de jonction, est disposée sur une section de la partie de jonction de façon à croiser la partie de jonction dans une direction allant de l'intérieur du corps de sac vers l'extérieur de celui-ci ; dans la section affaiblie, les films superposés sont reliés les uns aux autres uniquement par une pluralité de parties de jonction en forme de points (24) ; et la pluralité de parties de jonction en forme de points sont disposées sur toute la largeur de la section affaiblie de telle sorte que la résistance au pelage d'une partie de la section affaiblie qui est positionnée sur le côté intérieur du corps de sac, soit inférieure à la résistance au pelage d'autres parties de la section affaiblie.
PCT/JP2023/028399 2022-08-12 2023-08-03 Corps de sac de conservation d'aliments congelés et son procédé de production WO2024034510A1 (fr)

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JP2022-128904 2022-08-12
JP2022128904A JP7171111B1 (ja) 2022-08-12 2022-08-12 冷凍食品保存用袋体およびその製造方法

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Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS5623466A (en) * 1979-07-25 1981-03-05 Mitsubishi Plastics Ind Packed vessel having easy unsealing property
JPH1059432A (ja) * 1996-08-20 1998-03-03 Kazuo Itami 包装構造
JP2001063775A (ja) * 1999-08-26 2001-03-13 Tsutsumi Yotaro 電子レンジ用包装体
WO2014196071A1 (fr) * 2013-06-06 2014-12-11 NISHIOKA Mari Sac

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5623466B2 (ja) 2012-06-29 2014-11-12 東芝エレベータ株式会社 Ｂｉｍシステム、方法及びプログラム

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5623466A (en) * 1979-07-25 1981-03-05 Mitsubishi Plastics Ind Packed vessel having easy unsealing property
JPH1059432A (ja) * 1996-08-20 1998-03-03 Kazuo Itami 包装構造
JP2001063775A (ja) * 1999-08-26 2001-03-13 Tsutsumi Yotaro 電子レンジ用包装体
WO2014196071A1 (fr) * 2013-06-06 2014-12-11 NISHIOKA Mari Sac

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