JP2017013864A - Packaging bag for microwave oven and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag for a microwave oven, which easily maintains a self-standing state when heated and cooked, and moreover is superior in manufacturing suitability.SOLUTION: Prepared is a packaging bag which has an opening 13a at one section of a third edge 13, and which is provided with: a gusset part G; steam removal means V; a first portion 13S1 of a third edge seal part 13S, that is formed from a first edge 11 toward the opening 13a; a second portion 13S2 of the third edge seal part 13S, that is formed from a second edge 12 toward the opening 13a; and a first protruding seal part 13T disposed between the first edge 11 of the third edge seal part 13S and a folding part g of the gusset part G. After filling the packaging bag with contents through the opening 13a, a third portion 13S3 of the third edge seal part 13S is formed to hermetically seal the packaging bag. Since the steam removal means V is provided on a first edge 11 side, a self-standing state is more easily maintained compared to when the steam removal means is disposed on a third edge 13 side or a fourth edge 14 side, when heating and cooking with the microwave oven.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to the technical field of packaging bags for containing foods, and particularly relates to a packaging bag for microwave ovens that can be cooked by a microwave oven while foods are stored.

  Conventionally, packaging bags for microwave ovens in which various retort foods such as curry and Chinese food are encapsulated are commercially available. And when cooking with a microwave oven, various packaging bags with steam venting devices have been proposed in order to prevent the moisture contained in the contents from boiling and the internal pressure from increasing and the bag from bursting. Is actually put into practical use. Among them, it is a self-supporting packaging bag, which is connected to the trunk seal part or the top seal part and provided with a U-shaped seal part, and is unsealed part surrounded by the U-shaped seal part What is known as a vapor venting means by forming a cut or the like in (see, for example, Patent Document 1).

JP 2005-59872 A

  Among the microwave packaging bags described above, those that are connected to the trunk seal portion and provided with a steam venting means apply steam pressure to the trunk seal portion when cooked using a microwave oven in a self-supporting state. Therefore, there is a problem that it is difficult to maintain an independent state. On the other hand, it is difficult to form the steam venting means after filling the contents from the top with the one that is connected to the top seal part and filling the contents from the top. Has a problem that it is difficult to fill because the packaging bag is difficult to pick.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a microwave oven packaging bag that is easy to maintain a self-supporting state during cooking and that is excellent in manufacturing suitability. In addition, the manufacturing method is provided.

  The microwave oven packaging bag according to the present invention includes at least a first edge, a second edge facing the first edge, and a third edge extending between the first edge and the second edge. Provided, a steam venting means is provided on the first edge side, a gusset part is provided on the second edge side, a third edge seal part is provided along the third edge part, and the first edge and the gusset Between the folded-back portions of the third portion, it is connected to the inner seal line of the third edge seal portion, and protrudes closer to the housing portion than the portion extending from the first edge portion toward the gusset portion of the third edge seal portion. A first projecting seal portion is provided.

Moreover, the manufacturing method of the packaging bag for microwave ovens concerning this invention is the 1st edge part, the 2nd edge part which opposes a 1st edge part, and the 1st edge part extended between a 2nd edge part. Three edge portions, a steam venting means is provided on the first edge side, a gusset portion is provided on the second edge side, a third edge seal portion is provided along the third edge portion, Between the one edge part and the folded part of the gusset part, it is connected to the inner seal line of the third edge seal part and accommodates more than the part extending from the first edge part of the third edge seal part toward the gusset part A manufacturing method of a packaging bag for a microwave oven provided with a first projecting seal portion projecting toward the section side, comprising the following steps.
(1) having an opening in a part of the third edge, a gusset part, a steam release means, a first part of the third edge seal part formed from the first edge toward the opening; The second protruding seal part between the second part of the third edge seal part formed from the second edge part toward the opening, and the first edge part of the third edge seal part and the folded part of the gusset part A first step of preparing a packaging bag provided with
(2) A second step of sealing the packaging bag by forming the third portion of the third edge seal portion after filling the contents from the opening.

  According to the present invention, since the steam release means is provided on the first edge side, when the cooking is performed using the microwave oven with the gusset part provided on the second edge side as the bottom surface, Compared with the case where the steam venting means is provided on the edge side or the fourth edge side, it is possible to easily maintain a self-supporting state. In addition, by providing the first projecting seal part, after filling the packaging bag from the third edge side, when forming the third part of the third edge seal part, the position accuracy of the seal bar is increased. You can make room. For this reason, it is excellent in manufacturing aptitude.

It is a front view which shows the packaging bag for microwave ovens of the state before sealing. It is explanatory drawing corresponding to the AA cross section of FIG. It is a front view which shows the packaging bag for microwave ovens of the sealed state. It is a front view which shows the packaging bag for microwave ovens which provided the opening start means. It is a front view which shows the packaging bag for microwave ovens of a modification.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  1 is a front view showing an example of an intermediate product in the middle of manufacturing a packaging bag for a microwave oven of the present invention, FIG. 2 is an explanatory view corresponding to the AA cross section of FIG. 1, and FIG. 3 is an intermediate view of FIG. It is a front view which shows the packaging bag of the state which filled the product with the content and was sealed.

  The intermediate product of the microwave packaging bag P shown in FIG. 1 includes a first edge 11, a second edge 12 that faces the first edge 11, and between the first edge 11 and the second edge 12. The first edge 11 is provided with a first edge seal portion 11S, and the second edge is provided with a third edge 13 extending at a third edge 13 and a fourth edge 14 facing the third edge 13. 12 includes a second edge seal portion 12S, a third edge portion 13 includes a third edge seal portion 13S, and a fourth edge portion 14 includes a fourth edge seal portion 14S. The steam release means V is provided on the first edge 11 side, and the gusset part G is provided on the second edge 12 side.

  The intermediate product in FIG. 1 is a packaging bag P in a state before the container 10 is filled with the contents and sealed, and the third edge seal portion 13S extends from the first edge portion 11 to the second edge portion 12. The first portion 13S1 extending toward the first edge 13 and the second portion 13S2 extending from the second edge portion 12 toward the first edge portion 11 are unsealed portions between the first portion 13S1 and the second portion 13S2. An opening 13a is provided.

  Furthermore, in this intermediate product, a first protruding seal portion 13T is provided adjacent to the opening 13a in the first portion 13S1 of the third edge seal portion 13S, and the second portion 13S2 of the third edge seal portion 13S is provided. A first projecting seal portion 13T is provided adjacent to the opening 13a.

  The first projecting seal portion 13T connected to the inner seal line of the first portion 13S1 of the third edge seal portion 13S protrudes closer to the accommodating portion than the first portion 13S1 of the third edge seal portion 13S, and the first edge It is provided on the second edge 12 side from the part 11, for example, on the second edge 12 side from the vapor venting means V. Further, the first projecting seal portion 13T connected to the inner seal line of the second portion 13S2 of the third edge seal portion 13S protrudes closer to the accommodating portion than the second portion 13S2 of the third edge seal portion 13S. The gusset part G is provided closer to the first edge 11 than the folded part g. These first protruding seal portions 13T may be provided so as to extend substantially parallel to the folded portion g of the gusset portion G.

  These first protruding seal portions 13T preferably have no corners, that is, the corners are preferably chamfered. This can prevent the bag from being broken due to the corner. For example, as shown in FIG. 1, the first projecting seal portion 13 </ b> T can have a rectangular shape with a rounded corner located on the accommodating portion side. In this case, for example, the corner radius can be 2 mm. Or although not shown in figure, you may make the part facing the 4th edge part 14 of the 1st protrusion seal | sticker part 13T into circular arc shape.

  The vapor venting means V is preferably provided at the upper central portion of the packaging bag P. In the example shown in FIG. 1, as the steam release means V, a second projecting seal portion that is connected to the inner seal line of the first edge seal portion 11 </ b> S and projects further toward the storage portion 10 than the first edge seal portion 11 </ b> S. 11T is provided, the unsealed portion 15 is provided in the second projecting seal portion 11T, and the dividing portion 16 is provided in the unsealed portion 15. The unsealed portion 15 may be provided so as to extend from the second protruding seal portion 11T to the first edge seal portion 11S. The dividing part 16 is provided so as to penetrate the front film 1 and the back film 2 as shown in FIG. As the parting part 16, a notch | incision and a hole are mentioned, for example. By providing the dividing portion 16, steam can be removed through the dividing portion 16 when cooking using a microwave oven.

  In addition, it is preferable that the 2nd protrusion seal | sticker part 11T of the vapor | steam escape means V has a corner | angular part. This makes it easier to retreat the seal from the top of the corner when cooking using a microwave oven, so that the steam escape function can be more easily exhibited. The corner portion is preferably provided so as to face the center of the packaging bag P. For example, as shown in FIG. 1, the second protruding seal portion 11T can be triangular.

  The intermediate products in FIG. 1 are supplied one by one to the filling device, and after the contents are filled from the opening 13a of the third edge 13, the third portion 13S3 of the third edge seal portion 13S is formed. As shown in FIG. 3, a self-supporting microwave packaging bag P containing the contents is obtained. Specifically, the sheets are supplied one by one with the third edge 13 facing upward, and the second edge of the third edge 13 and the first edge 11 side of the third edge 13 by the chuck of the filling device. 12 side is held and the opening 13a is widened, the contents are filled from the widened opening 13a, and heat-sealed to close the opening 13a after filling, so that the third edge 13 is A third portion 13S3 of the three edge seal portion 13S is formed. For example, the distance W between the inner seal line of the third portion 13S3 of the third edge seal portion 13S and the position closest to the fourth edge 14 of the first protruding seal portion 13T can be 3 mm or more.

  At this time, the first portion 13S1 of the third edge seal portion 13S has the first protruding seal portion 13T, and the second portion 13S2 of the third edge seal portion 13S also has the first protrusion seal portion 13T. A margin can be given to the positional accuracy of the bar. That is, even if there is a slight shift in the position of the opening 13a with respect to the sealing device, both ends of the seal bar are heat-sealed in a state where they are within the range of the protruding seal portion 13T. Therefore, there is no case where the seal portion generated by the corner portion of the seal bar is cut and broken.

  The packaging bag for microwave ovens of this invention is good also considering the 3rd edge 13 ranging from the 1st edge 11 to the 2nd edge 12 as a straight line. For example, as shown in FIG. 1, the microwave packaging bag P is a square or rectangle in which the first edge 11, the second edge 12, the third edge 13, and the fourth edge 14 are all straight. Can do.

  The packaging bag for microwave ovens of this invention can be comprised with a flexible film. The film can be, for example, a laminated film in which at least a base material layer and a sealant layer are laminated. Furthermore, an intermediate layer may be provided between the base material layer and the sealant layer.

  As the base material layer, a polyester resin such as polyethylene terephthalate (PET), a polyamide resin such as nylon (Ny), polypropylene (PP), or the like can be used. Further, the base material layer is preferably stretched, and more preferably biaxially stretched.

  As the sealant layer, polyethylene resins such as low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), polypropylene (PP), and the like can be used.

  As the intermediate layer, an appropriate one can be selected according to required performance such as gas barrier properties such as water vapor and oxygen, light shielding properties, and various mechanical strengths. For example, in order to provide gas barrier properties, as an intermediate layer, an inorganic oxide such as silicon oxide, a vapor-deposited layer of metal oxide such as aluminum oxide, an ethylene-vinyl alcohol copolymer (EVOH), a polyvinylidene chloride resin ( PVDC) or aromatic polyamide such as nylon MXD6 may be provided. In order to increase the mechanical strength, nylon, polyethylene terephthalate (PET), or the like may be provided as an intermediate layer.

  As shown in FIG. 2, the packaging bag P for microwave ovens of a present Example is comprised by the surface film 1, the back film 2, and the intermediate film 3 folded in two via the broken line. In these films, a film in which a base material layer Fa and a sealant layer Fb are laminated from the outer surface is used, and an intermediate film 3 in a folded state is sandwiched between wall films 1 and 2 on the front and back sides to form a linear shape. The first edge seal portion 11S and the boat bottom-shaped second edge seal portion 12S are formed by heat sealing, and the third edge seal portion 13S and the fourth edge seal portion 14S along the left and right end edges. The intermediate product shown in FIG. 1 is made into a bag by heat sealing.

  Thus, the packaging bag P for microwave ovens can be comprised by the three members of the surface film 1, the back surface film 2, and the intermediate | middle film 3, for example. In this case, the intermediate film 3 is positioned between the front film 1 and the back film 2 with the folded portion g inside. Moreover, the packaging bag P for microwave ovens is one member in which the surface film 1, the intermediate film 3 and the back film 2 are continuously provided, or two members in which either the surface film 1 or the back film 2 is continuously provided with the intermediate film 3. It may be comprised. When the microwave packaging bag P is formed of one member or two members, the second edge seal portion 12S may not be provided.

  The microwave packaging bag of the present invention may be provided with the opening start means C at the third edge seal portion 13S or the fourth edge seal portion 14S. As the opening start means C, notches, notches, scars, and the like can be used. The scar group refers to a plurality of through holes provided so as to penetrate the film or a plurality of holes provided so as not to penetrate the film. When not penetrating the film, for example, the holes can penetrate only the base material layer and not the sealant layer. FIG. 4 shows an example in which a notch is provided as the opening start means C from the third edge portion 13 to the first projecting seal portion 13T. Thus, when the opening start means C is provided from the 3rd edge 13 to the 1st protrusion seal part 13T, it can make it easy for a user to recognize the opening start means C.

  The microwave packaging bag of the present invention may be provided with easy-opening means. For example, the easy-opening means can be formed from the third edge 13 toward the fourth edge 14. The easy-opening means is preferably provided so as to be continuous with the opening-starting means. For example, the easy-opening means may be provided continuously with the opening-starting means and provided over the fourth edge portion 14. For example, as an easy-opening means, a half cut line formed by laser processing or a cutter can be used. For example, the half-cut line can be provided so as to penetrate only the base material layer and not penetrate the sealant layer.

(Modification)
FIG. 5 shows a modification of the microwave packaging bag of the present invention. This microwave packaging bag P is obtained by changing the steam venting means V in the packaging bag P of FIG. 1, and is provided with an unsealed portion 15 from the first edge portion 11 toward the housing portion 10. In addition, it is preferable to provide the unsealed part 15 so that it may protrude in the accommodating part 10 side rather than the inner side seal line of the 1st edge part seal part 11S. Moreover, when providing the unsealed part 15 so that the 1st edge part 11 may be included, the parting part 16 does not need to be provided.

  It goes without saying that the packaging bag of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The packaging bag of the present invention is preferably used for storing and selling food to be cooked such as retort food, but can be used for storing any other heated product. it can.

DESCRIPTION OF SYMBOLS 1 Surface film 2 Back surface film 3 Intermediate | middle film 10 Storage part 11 1st edge part 11S 1st edge seal part 11T 2nd protrusion seal part 12 2nd edge part 12S 2nd edge seal part 13 3rd edge part 13a Opening part 13S 3rd edge seal part 13S1 1st part 13S2 2nd part 13S3 3rd part 13T 1st protrusion seal part 14 4th edge part 14S 4th edge seal part 15 Unseal part 16 Dividing part P Microwave packaging bag G Gusset part g Folding part Fa Base material layer Fb Sealant layer V Vapor release means C Opening start means

Claims (2)

  It comprises at least a first edge, a second edge facing the first edge, and a third edge extending between the first edge and the second edge, and a steam release means on the first edge side. A gusset portion is provided on the second edge side, a third edge seal portion is provided along the third edge portion, and a third edge is provided between the first edge portion and the folded portion of the gusset portion. A first projecting seal portion is provided which is connected to the inner seal line of the portion seal portion and protrudes toward the housing portion from a portion extending from the first edge portion of the third edge seal portion toward the gusset portion. A packaging bag for microwave ovens. It comprises at least a first edge, a second edge facing the first edge, and a third edge extending between the first edge and the second edge, and a steam release means on the first edge side. A gusset portion is provided on the second edge side, a third edge seal portion is provided along the third edge portion, and a third edge is provided between the first edge portion and the folded portion of the gusset portion. A microwave oven provided with a first projecting seal portion that is connected to the inner seal line of the inner seal portion and protrudes toward the housing portion from a portion extending from the first edge portion of the third edge seal portion toward the gusset portion. A method for manufacturing a packaging bag for microwave ovens, comprising the following steps.
(1) having an opening in a part of the third edge, a gusset part, a steam release means, a first part of the third edge seal part formed from the first edge toward the opening; The second protruding seal part between the second part of the third edge seal part formed from the second edge part toward the opening, and the first edge part of the third edge seal part and the folded part of the gusset part A first step of preparing a packaging bag provided with
(2) A second step of sealing the packaging bag by forming the third portion of the third edge seal portion after filling the contents from the opening.

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