JP2016113166A - Packaging bag with vapor removal mechanism - Google Patents

Abstract

Vapor is released when heated in a microwave oven due to an increase in internal pressure and does not rupture, and when removed from a microwave oven after heating, it will not burn or become hot and cannot be grasped A packaging bag with a mechanism is provided. SOLUTION: There are provided two upper and lower recesses 51 and 52 in which an inner edge of a left side seal portion 1 is recessed outward, and an overhanging portion 53 that protrudes inwardly between two recesses. Is provided with a steam vent mechanism in which the tip of the recess is positioned inward from the bottom of the two recesses, and the right side seal portion 2 is provided. Is wide, and a vertically long unsealed portion 6 is provided. [Selection] Figure 1

Description

  The present invention relates to a packaging bag with a steam release mechanism.

  2. Description of the Related Art Conventionally, packaged foods have been proposed in which cooked or semi-cooked food or the like is filled in a packaging bag made of a heat-resistant plastic film and heated by a microwave oven before cooking.

  However, when this packaged food is heated in a microwave oven, the packaging bag ruptures and the contents are scattered due to internal pressure such as vapor pressure generated from the food during heating, and the contents of the microwave oven are contaminated. was there.

For this reason, before heating in a microwave oven, for example, a small hole or the like is made in the packaging bag in advance using scissors or the like, or a part of the bag is cut off to increase the internal pressure inside the packaging bag. In this method, the steam generated after heating is immediately released out of the packaging bag, so that the steaming cooking effect by the steam is reduced, and the moisture of the food inside the packaging bag is evaporated, and the food deteriorates. There was a thing. For this reason, various packaging bags with a steam venting mechanism have been proposed which are provided with a mechanism that automatically opens by microwave heating and allows steam to escape.

  For example, a U-shaped seal portion is provided in connection with the top seal portion or the side seal portion, and at least one notch is provided in the unsealed portion surrounded by the U-shaped seal portion. There is a packaging bag for a microwave oven as a punched portion (Patent Document 1).

  In the said packaging bag for microwave ovens, there exists a possibility of grasping | ascertaining a vapor release part, when taking out after heating with a microwave oven. Moreover, even if it was not a steam vent part, depending on the part to be gripped, it was sometimes hot and could not be gripped.

  Known documents are shown below.

JP 2005-59872 A

  The present invention has been made in view of the above circumstances, and when heated in a microwave oven, the vapor does not escape due to an increase in internal pressure and does not rupture. It is an object of the present invention to provide a packaging bag with a steam venting mechanism that is neither hot nor gripped.

  The present invention has been made in view of the problem, and the invention of claim 1 is provided with a steam venting mechanism at the upper part of one side seal part or at the corner of the upper end, and the other side seal part is widened. It is a packaging bag with a steam release mechanism, characterized in that a vertically long unsealed portion is provided.

  The invention according to claim 2 of the present invention is the packaging bag with a vapor venting mechanism according to claim 1, wherein the unsealed portion is filled with gas.

  The invention according to claim 3 of the present invention is characterized in that an opening notch is provided in the upper part of the other side seal part and the upper part protrudes outward from the opening notch. It is a packaging bag with a steam release mechanism.

  In the invention according to claim 4 of the present invention, the steam release mechanism projects inwardly between two upper and lower recesses in which the inner edge of one side seal portion is recessed outward and the two recesses. A bulged portion that is recessed inwardly in accordance with the bulged portion, and the tip of the recessed portion is located inward from the bottoms of the two dents. A packaging bag with a steam release mechanism according to any one of claims 1 to 3.

  The invention according to claim 5 of the present invention is the packaging bag with a steam release mechanism according to claim 4, wherein the outer edge of the recess is formed in a corrugated shape in which peaks and valleys are alternately repeated. .

  The invention according to claim 6 of the present invention is characterized in that the lower side of the steam release mechanism of one of the side seal portions is wide and a vertically long unsealed portion is provided. It is a packaging bag with a mechanism.

  The invention according to claim 7 of the present invention is characterized in that the bottom seal portion is sealed in a boat bottom shape by sandwiching the bottom tape between the front and back films. It is a packaging bag with a steam release mechanism of description.

  The packaging bag with a steam release mechanism of the present invention does not burst due to an increase in internal pressure when heated in a microwave oven, and when it is taken out of the microwave oven after heating, it is burned or gripped hot. There is nothing to do.

It is explanatory drawing which showed typically an example of the packaging bag with a steam release mechanism of this invention in the front.

Hereinafter, embodiments for carrying out the present invention will be described.
Drawing 1 is an explanatory view showing typically an example of a packaging bag with a steam venting mechanism of the present invention on the front.

  As shown in the front view of FIG. 1, the packaging bag 100 with a steam release mechanism of this example is provided with a left side seal part 1, a right side seal part 2, and a bottom seal part 3, and the bottom seal part 3 is a bottom tape. 4 is a standing pouch sandwiched between front and back films and sealed in a boat bottom shape.

  The upper part of the left side seal part 1 is provided with a steam release mechanism. The steam release mechanism has two upper and lower recesses 51 and 52 in which the inner edge of the left side seal part 1 is recessed outward, and two recesses. It is composed of a projecting portion 53 projecting inwardly between 51 and 52 and a recess portion 54 recessed inward with the outer edge aligned with the projecting portion, and the tip of the recess portion 54 has two recesses. 51 and 52 are located inward from the bottom.

  Because of this structure, when heated in a microwave oven, the overhanging portion 53 moves backward (the peeling of the sealing portion progresses) due to an increase in internal pressure, and when the tip of the hollow portion 54 is peeled off, steam is generated. The internal pressure drops and does not burst.

Moreover, since the packaging bag 100 with a steam release mechanism of this example is a standing pouch with the bottom tape 4 sandwiched therebetween, it can be stood up and placed in a microwave oven for cooking. If the pouch is not a standing pouch, it can be stood by a separate member using an exterior box and put into a microwave oven for cooking.

  Further, the outer edge of the recess 54 is formed in a wave shape in which peaks and troughs are alternately repeated, and it is associated with the image that steam is blown out, so that it is easy to attract attention visually.

  The right side seal portion 2 is provided wide so that it does not become hot when held. In addition, a vertically long unsealed portion 6 is provided to prevent wrinkles due to the seal, and the strength in the vertical direction is increased to make it difficult to bend. Further, the unsealed portion 6 can be filled with a gas such as air. If it does in this way, the intensity | strength of an up-down direction will further increase, it will become difficult to bend, and also it will become easy to have.

  And the opening notch 7 is provided in the upper part of the right side seal part 2, and it has the right side seal part 2 when opening, without touching the surroundings of the steam venting mechanism that is hot when the steam escapes. It can be opened. For this reason, the left side seal portion 1 is not provided with an opening notch. Further, the upper part protrudes outward from the opening notch so that the knob 8 can be easily picked when it is opened from the opening notch 7.

  The left side seal portion 1 is also wide below the steam release mechanism, and is provided with a vertically long unsealed portion 9. The unsealed portion 9 prevents the occurrence of wrinkles when sealed wide, and when unpacking the right side seal portion 2 with both hands when removing it from the microwave oven after cooking, or when opening the contents in the tableware. It can be performed with the seal portion 6 and the unsealed portion 9 of the left side seal portion 1 and can be stably held. Further, the unsealed portion 9 can be filled with a gas such as air. If it does in this way, the intensity | strength of an up-down direction will further increase, it will become difficult to bend, and also it will become easy to have.

  A laminated film in which a base material layer and a sealant layer are laminated is preferably used for the front and back films and the bottom tape used for the packaging bag with a steam release mechanism of the present invention. As the substrate layer, a biaxially stretched resin such as nylon, polyethylene terephthalate, or polypropylene, or a uniaxially stretched or unstretched film can be preferably used. In this case, the thickness is about 12 to 50 μm.

  The base material layer may be provided in multiple layers. Multi-layer base material layer is laminated from the outer layer side, such as polyethylene terephthalate / nylon, nylon / polyethylene terephthalate, nylon / inorganic oxide vapor-deposited polyethylene terephthalate, nylon / polyvinylidene chloride, nylon / ethylene vinyl matching co-polymer. Film can be used. As the inorganic oxide used for vapor deposition, alumina or silica is preferably used.

  A heat-meltable resin is used for the sealant layer. Since it is cooked in a microwave oven, polypropylene or linear low density polyethylene having a high softening point is preferably used. Moreover, you may use the multilayer coextruded film which consists of these resin and another resin.

  The thickness of the sealant layer is adjusted depending on the amount of the contents, but a thickness of 50 μm to 180 μm is easily used.

  The method for bonding the base material layer and the sealant layer and the method for bonding the base materials of the multilayer base material layers are preferably performed by a dry laminating method. In some cases, the sandwich lamination method may be used, or the sealant layer may be extruded while forming a film from an extruder and may be bonded to the base material layer by an extrusion lamination method.

  Moreover, a pattern printing layer can be provided in the back surface of a base material layer. Moreover, in the case of a multilayer base material layer, a pattern printing layer can be provided between the base material layers. The printing method for providing the pattern printing layer is not particularly limited, but gravure printing or flexographic printing is usually used.

  As described above, the packaging bag with a vapor venting mechanism of the present invention does not explode due to an increase in internal pressure when heated in a microwave oven, and does not rupture. Nor is it too hot to grasp. For this reason, even an elderly person or a lower-grade child can cook with a microwave oven.

DESCRIPTION OF SYMBOLS 100 ... Packaging bag with a steam release mechanism 1 ... Left side seal part 2 ... Right side seal part 3 ... Bottom seal part 4 ... Bottom tape 51, 52 ... Depression 53 ... Overhanging part 54 ... depression part 6, 9 ... unsealed part 7 ... notch 8 for opening ... picking part

Claims (7)

  A packaging bag with a steam venting mechanism, wherein a steam venting mechanism is provided at an upper portion of one side seal portion or a corner portion at an upper end, the other side seal portion is wide, and a vertically long unsealed portion is provided.   The packaging bag with a vapor venting mechanism according to claim 1, wherein the unsealed portion is filled with gas.   The packaging bag with a steam venting mechanism according to claim 1 or 2, wherein an opening notch is provided in an upper part of the other side seal part, and the upper part protrudes outward from the opening notch.   The steam release mechanism has two upper and lower recesses in which the inner edge of one side seal portion is recessed outward, an overhang portion that protrudes inwardly between the two recesses, and an outer edge of the overhang. 4. A hollow portion recessed inward in accordance with the portion, and the tip of the hollow portion is located inward from the bottom of the two hollows. A packaging bag with a vapor venting mechanism according to item 1.   5. The packaging bag with a steam venting mechanism according to claim 4, wherein the outer edge of the recess is formed in a corrugated shape in which peaks and valleys are alternately repeated.   The packaging bag with a steam venting mechanism according to claim 4 or 5, wherein a width of the side seal portion below the steam venting mechanism is wide and a vertically long unsealed portion is provided.   The packaging bag with a steam venting mechanism according to any one of claims 1 to 6, wherein the bottom seal portion is sealed in a boat bottom shape by sandwiching a bottom tape between front and back films.

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