JP2018090311A - Pouch for microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch for a microwave oven which is excellent in commodity display performance and usability.SOLUTION: A pouch comprises a front face film 1, a back face film 2, and a bottom face film 3 which is placed between the front face film 1 and the back face film 2, in which a bottom gusset portion 9 is formed. The bottom gusset portion 9 has a first ply portion 9a and a second ply portion 9b, and side portions of the first ply portion 9a and the second ply portion 9b are connected mutually. The pouch has a commodity display portion 12 on at least one of the front face film 1 and the back face film 2. Because the first front film 1 and the bottom face film 3, and the back face film 2 and the bottom face film 3 are sealed mutually, a first bottom seal portion 6a is formed. The first bottom seal portion 6a is formed so as to incline from a side of the pouch to a center portion, a through steam structure 10 is provided in the first ply portion 9a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a microwave oven pouch that is cooked using a microwave oven.

  Conventionally, food can be cooked with a microwave while the food is contained in a container, and has the effect of steaming the food contained by the steam generated during cooking, and the steam is partially peeled off by the internal steam pressure. There is known a packaging bag that can escape (see Patent Documents 1 and 2).

JP 2005-320023 A JP 2013-151317 A

  On the other hand, as a packaging bag, there is a demand for display in a state where the container is self-supporting in order to make its presence stand out in a store. The techniques described in Patent Documents 1 and 2 have a function of automatically steaming during heating, but it is difficult to maintain a self-supporting state.

  Then, this invention makes it a subject to provide the pouch for microwave ovens excellent in goods display property and usability.

In order to solve the above problems, the present invention is a pouch comprising a surface film, a back film, a bottom film positioned between the surface film and the back film, and having a bottom gusset portion,
The bottom gusset part has a first pleat part and a second pleat part, and the first pleat part and the second pleat part are joined at sides.
The pouch has a product display part on at least one of the front film and the back film,
The first bottom seal part is formed by sealing the surface film and the bottom film, and the back film and the bottom film,
The inner edge of the first bottom seal part includes a portion inclined from the side part of the pouch toward the center part,
A microwave oven pouch is provided, wherein a steaming mechanism is provided in the first pleat portion, and a steaming mechanism is not provided in the second pleat portion.

  Further, according to the present invention, the steaming mechanism includes a projecting seal part projecting upward from a lower end of an inner edge of the first bottom seal part, and a first notch part formed below the projecting seal part. May be.

  According to the present invention, since the side portions of the first pleat portion and the second pleat portion of the bottom gusset portion are joined, the pouch has a self-supporting property. Therefore, the pouch can be displayed in a self-supporting state, and the product display is excellent. Further, the first pleat portion of the bottom gusset portion is provided with a steaming mechanism, and the second pleat portion is not provided with a steaming mechanism. Of the front and back surfaces of the pouch, cooking can be performed with a microwave oven with the back side down, and the contents can be prevented from leaking out when the steam escapes.

It is the front view and back view which show the pouch for microwave ovens concerning one Embodiment of this invention. It is an exploded view which shows the film which comprises the pouch for microwave ovens concerning one Embodiment of this invention. It is AA sectional view taken on the line in Fig.1 (a). It is BB line (center part) sectional drawing in Fig.1 (a). It is a figure which shows the layer structure of the film which comprises the pouch for microwave ovens. It is an external appearance perspective view which shows the state which made the pouch for microwave ovens self-supporting. It is sectional drawing which shows an example which heat-cooks the pouch for microwave ovens. It is the front view and back view which show the modification of the pouch for microwave ovens. It is a partially expanded view which shows the modification of a steaming mechanism.

DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
<Embodiment>
FIG. 1 is a diagram showing a microwave oven pouch according to an embodiment of the present invention. FIG. 1A is a front view, and FIG. 1B is a rear view. FIG. 2 is an exploded view showing a film constituting the microwave pouch according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the microwave oven pouch taken along the line AA in FIG. FIG. 4 is a cross-sectional view of the microwave pouch taken along the line BB in FIG. The microwave oven pouch according to the embodiment shown in FIG. 1 shows a pouch in a state before the contents are filled (a state where the contents are not filled). The pouch of the embodiment has a rectangular shape in a front view and has a bottom gusset portion. In the present embodiment, the rectangle is a concept including not only a rectangle having four right corners but also a shape in which the four corners of the rectangle are chamfered to form an outwardly convex arc shape. In the present invention, the microwave oven pouch is not limited to the microwave oven pouch in a state where the contents are not filled, but also includes a microwave oven pouch in which the contents are filled.

(Description of each film)
As shown in FIG. 2, the pouch for the microwave oven according to the embodiment is composed of three films of a substantially rectangular surface film 1, a back film 2 having the same shape as the surface film 1, and a substantially rectangular bottom film 3. It is configured. The microwave oven pouch of the present embodiment is formed by sealing (heat-sealing) three films of a front film 1, a back film 2, and a bottom film 3 at predetermined locations.

  As shown in FIG. 2, the bottom film 3 is folded in two, and is divided into a first portion 3f and a second portion 3g with the folding portion 3a as a boundary. The bottom film 3 is provided with four semicircular arc-shaped second cutout portions 3b, 3c, 3d, and 3e so as to cut out the side edges, the second cutout portions 3b and 3c, and the second cutout portions. The notches 3d and 3e are provided at positions corresponding to when the two are folded. A second bottom seal portion 6b described later is formed through the second cutout portions 3b to 3e.

(Description of each seal part)
As shown in FIG. 1, the microwave oven pouch according to the embodiment includes a side seal portion 5 a and a bottom seal portion, and an opening 15 is formed in the upper portion 4. The side seal part 5a is formed by sealing the front film 1 and the back film 2, and is formed from the folded part 3a to the upper edge of the pouch. The side seal portion 5a is preferably formed with a width of 2 mm or more and 15 mm or less, and more preferably formed with a width of 4 mm or more and 10 mm or less. The bottom seal portion includes a first bottom seal portion 6a and a second bottom seal portion 6b. The first bottom seal portion 6a is obtained by sealing the first portion 3f of the surface film 1 and the bottom film 3, and the second portion 3g of the back film 2 and the bottom film 3, and the first bottom seal portion 6a 1 part 6aa and 2nd part 6ab of a 1st bottom part seal part are comprised. The second bottom seal portion 6b is obtained by sealing the front film 1 and the back film 2.

(Description of bottom gusset part)
As shown in FIG. 3 and FIG. 4, a first pleat 9 a is formed by the first portion 3 f of the bottom film 3 and the portion corresponding to the first portion 3 f of the bottom film 3 of the surface film 1, and A second pleat 9b is formed by the second portion 3g of the bottom film 3 and the portion corresponding to the second portion 3g of the bottom film 3 of the back film 2. In FIG. 4, a portion corresponding to a first cutout portion 8 to be described later is indicated by a one-dot chain line. The bottom gusset portion 9 is formed by the first fold portion 9a and the second fold portion 9b. In the front view of FIG. 1 (a), the first pleat portion 9a is visible below the folding portion 3a. In the rear view of FIG. 1 (b), the first fold portion 9a is below the folding portion 3a. The two pleats 9b are visible.

(Description of housing part)
After the contents are accommodated through the opening 15, the upper seal portion 4b is formed in the upper seal planned portion indicated by 4a in FIG. 1, and the microwave pouch is sealed. The upper seal portion 4b is formed from one side seal portion 5a to the other side seal portion 5a. The accommodating portion 11 is defined by the inner edge of the side seal portion 5a, the inner edge of the first bottom seal portion 6a, and the inner edge of the upper seal portion 4b.

(Product display part)
As shown in FIG. 1A, the pouch according to the embodiment is provided with a product display unit 12 on the surface film 1. The merchandise display is for displaying merchandise information or imparting aesthetics, and is formed using letters, numbers, figures, patterns, photographs, patterns, patterns, symbols, patterns, marks, and the like. The product display unit 12 may be formed on the back film 2.

(Contents)
The contents contain moisture and oil. Examples of the contents include retort foods, frozen foods, and refrigerated foods. Examples of the food include curry, rice cake, yakisoba, side dish, and fish. In these contents, the moisture evaporates with heating and the pressure of the pouch container 11 is increased, so that a steam venting function for releasing the steam in the container 11 to the outside is required.

(Description of film)
FIG. 5 is a diagram showing a layer structure of a film constituting a microwave oven pouch. The front surface, the back surface, and the bottom surface can be constituted by the laminated film 30. The laminated film 30 includes at least a base material layer 31, a printing layer 32, and a sealant layer 34 from the outside. In the embodiment, as shown in FIG. 5, in the laminated film 30, a base material layer 31, a printing layer 32, and a sealant layer 34 are laminated in order from the outside. The sealant layer 34 is a layer constituting the innermost surface of the pouch. Microwave pouches are required to be resistant to heat. For this reason, the base material layer 31 of the embodiment is made of a material having heat resistance. For example, as the material of the base material layer 31, a polyester film such as polyethylene terephthalate, a polyamide film such as nylon, a polypropylene film, a polypropylene / ethylene-vinyl alcohol copolymer co-extrusion co-stretched film, or the like can be used. The thickness is about 10 to 50 μm. The base material layer 31 is preferably biaxially stretched. Moreover, the laminated film may include a plurality of base material layers.

  The product display unit 12 is formed by the print layer 32. The printing layer 32 is formed by printing ink containing a binder and a pigment. The sealant layer 34 is disposed on the innermost side of the laminated film 30 when the bag is made into a pouch. As a material of the sealant layer 34, polyolefin resin such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-propylene block copolymer, and the like can be adopted. In order to develop easy peel properties, the sealant layer 34 may be a mixed resin including one resin and a resin incompatible with the one resin. Examples of such a mixed resin include polyethylene and polypropylene, and polyethylene and polybutene. The thickness of the sealant layer 34 is not less than 30 μm and not more than 150 μm. The sealant layer 34 is preferably unstretched.

  The laminated film 30 may include another layer 33. Other layers may be provided outside the base material layer 31, or may be provided between the base material layer 31 and the sealant layer 34 as shown in FIG. 5. As the other layer 33, an appropriate layer is selected according to required functions such as water vapor and other gas barrier properties and light shielding properties. For example, when the other layer is a gas barrier layer, a vapor deposition layer of a metal such as aluminum, a metal oxide such as aluminum oxide, or an inorganic oxide such as silicon oxide is provided. The vapor deposition layer may be laminated on the base material layer 31 or may be vapor deposited on the sealant layer 34. Alternatively, a metal foil such as aluminum may be provided. In addition, a resin layer having a gas barrier property such as an ethylene-vinyl alcohol copolymer (EVOH), a polyvinylidene chloride resin (PVDC), and an aromatic polyamide such as nylon MXD6 may be provided. Each layer can be laminated using a dry lamination method, a melt extrusion method, or the like.

(Explanation of the steaming mechanism)
As shown to Fig.1 (a), in the pouch for microwave ovens, the steaming mechanism 10 is provided in the 1st pleat part 9a. The steaming mechanism 10 includes a projecting seal portion 7 and a first notch portion 8.

(Protruding seal)
As shown in FIG. 1 (a), the first bottom seal portion 6a is composed of a first portion 6aa and a second portion 6ab, and a protruding seal portion 7 is provided between the first portion 6aa and the second portion 6ab. It has been. The protruding seal portion 7 is obtained by sealing the surface film 1 and the first portion 3 f of the bottom film. The first portion 6aa of the first bottom seal portion 6a, the projecting seal portion 7, and the second portion 6ab of the first bottom seal portion 6a are connected to each other. In FIG. 1A, the first portion 6aa and the projecting seal are connected. The boundary between the portions 7 and the boundary between the second portion 6ab and the protruding seal portion 7 are indicated by alternate long and short dash lines. The inner edge of the first portion 6aa and the inner edge of the second portion 6ab of the first bottom seal portion 6a include a portion inclined downward from the side portion 5 of the microwave oven pouch toward the center portion. In the embodiment, the inner edge of the first part 6aa and the inner edge of the second part 6ab of the first bottom seal part 6a are inclined downward from the side part 5 of the microwave oven pouch toward the center part and directed downward. However, it may be a straight line. The inner edge of the first portion 6aa and the inner edge of the second portion 6ab of the first bottom seal portion 6a are formed so as to be inclined downward from the side portion 5 of the microwave oven pouch toward the center portion. It becomes easy to become independent after filling. Further, the protruding seal portion 7 is connected to the narrowest portion of the first bottom seal portion 6a.

  As shown in FIGS. 1 (a) and 4, the protruding seal portion 7 protrudes above the lowest point (lower end) of the inner edge of the first bottom seal portion 6a and is formed below the folding portion 3a. . In FIG. 1A, the connecting point 13 between the inner edge of the first portion 6aa of the first bottom seal portion 6a and the inner edge of the protruding seal portion 7, and the inner edge of the second portion 6ab of the first bottom seal portion 6a protrudes. A virtual line connecting the connection point 13 with the inner edge of the seal portion 7 is indicated by a one-dot chain line.

The length L1 of the imaginary line, which is the distance between the two connecting points 13 shown in FIG. 1A, is preferably 10 mm to 40 mm. If the length L1 of the imaginary line between the two connecting points 13 is too narrow, it is difficult for the steam to escape.
The ratio L1 / W1 of the length L1 of the imaginary line to the width W1 (distance between both side edges) of the pouch shown in FIG. 1A is preferably 1/20 to 1/5, and 1/12 to 1 / 8 is preferable. If the ratio L1 / W1 is too small, it will be difficult for the steam to escape, and if it is too large, the contents will likely leak out when the steam has escaped.
The width W2 of the protruding seal portion 7 shown in FIG. 1A is also preferably 1 mm to 5 mm, and more preferably 2 mm to 3 mm. If the width W2 of the protruding seal portion 7 is too narrow, the contents may leak through the protruding seal portion during transportation or the like, and if it is too wide, it will be difficult for the steam to escape.
It is preferable that the distance D1 from the connecting point 13 in the direction orthogonal to the folding part 3a shown to Fig.1 (a) to the front-end | tip 7a of the protrusion seal part 7 is 2 mm-10 mm. When the distance D1 is small, it is difficult for the steam to escape.
It is preferable that the distance D2 from the lower end of the inner edge of the second part 6ab of the first bottom seal part 6a to the bottom edge in the direction orthogonal to the folding part 3a shown in FIG. 1 (a) is 5 mm to 15 mm. When distance D2 is large, it becomes difficult to become independent.
The ratio D2 / D1 of the distance D2 with respect to the distance D1 is also preferably 0.5 to 2.0, and more preferably 1.2 to 1.6.

(1st notch)
A first notch portion 8 is provided in a portion corresponding to the protruding seal portion 7 of the first pleat portion 9a. The first cutout 8 is formed so as to cut out the lower edge of the surface film 1 and the lower edge of the bottom film 3. As shown in FIG. 1 (a), the first notch portion 8 includes a connecting point 13 between the inner edge of the first portion 6aa of the first bottom seal portion 6a and the inner edge of the protruding seal portion 7, and the first bottom seal. It is formed so as to reach above the imaginary line connecting the inner edge of the second portion 6ab of the portion 6a and the connecting point 13 between the inner edge of the protruding seal portion 7. The 1st notch part 8 is formed in the substantially triangular shape.

  FIG. 6 is a diagram illustrating a state where the microwave oven pouch is self-supporting. After the contents are filled, the upper seal planned portion 4a is sealed to form the upper seal portion 4b as shown in FIG. In FIG. 6, the content is omitted. Since the upper seal part 4b is the one in which the front film 1 and the back film 2 are sealed, the area of the opening 15 can be increased and the filling ability is excellent. Since the side part 5 is sealed, the 1st pleat part 9a and the 2nd pleat part 9b can be displayed in the self-standing state. When displayed in a self-supporting state, the product display unit 12 provided on the surface film 1 is conspicuous and can attract the eyes of consumers. For this reason, it is excellent in goods display property.

  FIG. 7 is a diagram illustrating an example of cooking a microwave pouch. FIG. 7 is a cross-sectional view corresponding to the line BB in FIG. However, in FIG. 7, the content is filled from the state shown in FIGS. 1 and 4, and the upper seal portion 4b is formed. In FIG. 7, the content is omitted. As shown in FIG. 7, it heats using a microwave oven in the state mounted in the microwave oven with the back film 2 side down. When the container 11 is heated and expanded by the steam, the projecting seal 7 is peeled off from the tip 7a side by pressure. When the projecting seal portion 7 is peeled off to the first cutout portion 8, the accommodating portion 11 is connected to the outside, and the steam escapes to the outside. In FIG. 7, the arrow in the vicinity of the first notch 8 indicates the direction in which the steam escapes. At this time, since the steaming mechanism 10 is provided in the first pleat portion 9a, it is possible to prevent the contents from leaking outside when the steam escapes. For this reason, it is excellent in usability.

<Modification>
(Structure of the film)
In the said embodiment, although comprised with three films, the surface film 1, the back film 2, and the bottom film 3, you may comprise by two sheets or one film. For example, a pouch for a microwave oven may be configured by using a single film in which a surface film, a bottom film, and a back film are continuously provided, or a film in which a surface film, a back film, and a bottom film are continuously provided. You may form the microwave oven pouch using a total of two films.

(Join the first and second folds)
In the above embodiment, the first pleats are formed by sealing the front film 1 and the back film 2 through the second notches 3b to 3e provided on the bottom film 3 to form the second bottom seal 6b. Although the example which joins the part 9a and the 2nd pleat part 9b was demonstrated, the 1st pleat part 9a and the 2nd pleat part 9b are joined by providing a hole in the bottom film 3 instead of the 2nd notch parts 3b-3e. May be. Alternatively, the first film 3f and the second film 3g of the bottom film 3 can be obtained by using an adhesive such as hot melt or by ultrasonically sealing the bottom film 3 without providing the second notches 3b to 3e. And may be joined. In this case, the outer surfaces of the bottom film 3 are joined together.

  FIG. 8 is a front view and a rear view showing a modification of the microwave oven pouch. In the modification shown in FIG. 8, a notch 14 is formed in the side seal portion 5a as an opening start means. The notch 14 is formed above the folding part 3a (upper 4 side) and below the center in the height direction of the microwave pouch. The microwave oven pouch can be opened by using the notch 14 as an opening (opening start means). In FIG. 8, the opening start means is provided on both sides, but it may be provided only on one side.

  FIG. 9 is a view showing a modified example of the steaming mechanism 10. FIG. 9 is a front view of a microwave pouch. For the sake of convenience, the first pleat portion 9a is shown in order to avoid making the figure complicated. Only a part of the second bottom seal portion 6b is omitted. 9 (a) and 9 (b), the steaming mechanism 10 is provided in the first pleat portion 9a, and the steaming mechanism 10 includes the projecting seal portion 7 and the first cutout portion 8. This is the same as the embodiment of FIG. 9 (a) and 9 (b), the protruding seal portion 7 protrudes upward from the lowest point (lower end) of the inner edge of the first bottom seal portion 6a and is lower (outside) than the folding portion 3a. 1) is the same as the embodiment of FIG. 1A.

  9 (a) and 9 (b), the shapes of the protruding seal portion 7 and the first cutout portion 8 constituting the steaming mechanism 10 are different from the embodiment of FIG. 1 (a). Specifically, in the modification of FIG. 9A, the inner edge of the protruding seal portion 7 has an arc shape. The first cutout portion 8 is formed in a substantially semicircular shape so that the protruding seal portion 7 has a certain width. Moreover, in the modification of FIG.9 (b), the inner edge of the protrusion seal | sticker part 7 is substantially M shape. The upward convex portions are the two tips 7 a of the protruding seal portion 7. The first cutout portion 8 is formed so that the protruding seal portion 7 has a certain width. As shown in FIG. 9B, when the projecting seal portion 7 has a plurality of tips 7a, each tip 7a can be made to have a sharper shape, so that the steam can be easily escaped.

  Also in the modified example of FIG. 9C, the point that the first pleat portion 9a is provided with the steaming mechanism 10, the protruding seal portion 7 is from the lowest point (lower end) of the inner edge of the first bottom seal portion 6a. It is the same as the embodiment of FIG. 1A in that it protrudes upward and is formed below (outside) the folding part 3a. In the modified example of FIG. 9C, the steaming mechanism 10 is different from the embodiment of FIG. 1A in that the first notch portion 8 is not provided and the unsealed portion 8a is provided instead. Yes. In the modification of FIG. 9C, the triangular unsealed portion 8a that does not seal the surface film 1 and the bottom film 3 is formed in the first pleat portion 9a so that the protruding seal portion 7 has a certain width. Is provided. In the modified example of FIG. 9C, the unsealed portion 8a includes a connecting point 13 between the inner edge of the first portion 6aa of the first bottom seal portion 6a and the inner edge of the protruding seal portion 7, and the first bottom seal portion 6a. The second portion 6ab is formed so as to reach above the imaginary line connecting the connecting point 13 between the inner edge of the second portion 6ab and the inner edge of the protruding seal portion 7. In the modified example of FIG. 9C, since the unsealed portion 8a exists, the protruding seal portion 7 peels off, so that steam passes from the unsealed portion of the bottom portion 6 through the unsealed portion 8a. Get out. Further, in order to facilitate the escape of steam, a cut, hole or notch may be formed in the unsealed portion 8a.

  The preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made. Accordingly, various modifications within the scope of the present invention are all included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Surface film 2 ... Back film 3 ... Bottom film 3a ... Folding part 3b-3e ... 2nd notch part 3f ... 1st part of bottom film 3g ... Bottom Second part of film 4... Upper part 4a... Upper seal scheduled part 5... Side part 5 a... Side part seal part 6 ... Bottom part 6 a ... First bottom part seal part 6 aa. 1st part 6ab of the 1st bottom part seal part ... 2nd part of the 1st bottom part seal part 6b ... 2nd bottom part seal part 7 ... Projection seal part 7a ... Tip of projection seal part 8 ... -1st notch part 9 ... Bottom gusset part 9a ... 1st pleat part 9b ... 2nd pleat part 10 ... Steaming mechanism 11 ... Storage part 12 ... Product display part 13 ... continuous connection point 14 ... notch 15 ... opening 30 ... laminated film

Claims (2)

A pouch comprising a surface film, a back film, a bottom film positioned between the surface film and the back film, and having a bottom gusset portion,
The bottom gusset part has a first pleat part and a second pleat part, and the first pleat part and the second pleat part are joined at sides.
The pouch has a product display part on at least one of the front film and the back film,
The first bottom seal part is formed by sealing the surface film and the bottom film, and the back film and the bottom film,
The inner edge of the first bottom seal part includes a portion inclined from the side part of the pouch toward the center part,
A microwave oven pouch characterized in that a steaming mechanism is provided in the first pleat portion and a steaming mechanism is not provided in the second pleat portion.   The steaming mechanism includes a protruding seal part protruding upward from a lower end of an inner edge of the first bottom seal part, and a first notch part formed below the protruding seal part. The pouch for microwave ovens according to 1.

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