JP2019034771A - Film and packing material - Google Patents

Abstract

To provide a film, a packing material, and a packing food which can correspond to more combinations, of combinations of objects that are preferably arranged in the same room by heating.SOLUTION: A film 35 which follows to a phase of this invention is a thermoplastic film used to a packing material to pack a heating object. In one portion of the film, a half cut line 37 is formed. The half cut line is constructed so that the film begins to tear from the half cut line when the heating object has reached a predetermined temperature in a state that the film is used to the packing material.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a film and a packaging material.

  Japanese Patent Laying-Open No. 2009-161188 (Patent Document 1) discloses a container that can be heated in a microwave oven. The container includes a container body and a lid. The container body contains food and the lid is fitted with a bag in which cooking liquid is sealed. The bag is provided with a small hole covered with a film. When this container is heated in a state where the bag is attached to the lid, the film is partially peeled and the cooking liquid flows out from the small holes. Thereby, a cooking liquid is automatically dripped at a foodstuff (refer patent document 1).

JP 2009-161188 A

  According to the packaging material (container) disclosed in Patent Document 1, the cooking liquid is automatically dropped onto the food material by heating, and the food material and the cooking liquid can be automatically placed in the same room (container body). it can. Other than the combination of food and cooking liquid, a combination that is preferably automatically arranged in the same room by heating is conceivable. For example, a container is also conceivable in which rice is stored in the container body, a cutlet is stored in the lid, and the cutlet is dropped on the rice of the container body by heating.

  However, the film disclosed in Patent Document 1 is configured to allow the cooking liquid to flow out of the small holes by heating, and is not configured to drop a large object such as a cutlet. Therefore, depending on the film disclosed in Patent Document 1, only a very few combinations among the combinations of objects that are preferably arranged in the same chamber by heating can be handled.

  The present invention has been made in order to solve such a problem, and the object thereof is to provide a film capable of handling a larger number of combinations among combinations of objects that are preferably arranged in the same room by heating. It is to provide packaging materials.

  The film according to an aspect of the present invention is a thermoplastic film used for a packaging material for packaging an object to be heated. A half cut line is formed in a part of the film. The half cut line is configured such that the film starts to break from the half cut line when the heating target reaches a predetermined temperature in a state where the film is used for the packaging material. The half cut line is formed by a line that has been half cut by a laser or the like.

  A half cut line is formed in a part of the film. When the object to be heated is heated, the temperature of the film rises. As the temperature rises, the film begins to shrink. And since the outer peripheral part of the film is being fixed to the container etc., a film begins to be broken by using a half cut line as a trigger, and a comparatively large hole is formed. Therefore, according to this film, even if the object to be heated is a relatively large object, the object to be heated can be moved through the formed hole. That is, according to this film, it is possible to deal with more combinations among combinations of objects that are preferably arranged in the same room by heating. For example, when this film is attached to the lid of a container, even if the heating target is relatively large, when the heating target reaches a predetermined temperature, the film is torn and the heating target stored on the lid side is To the container body.

  The film may be a single layer stretched film.

  The film may be a multilayer film, and in that case, a stretched film may be included in at least one of the layers.

  When the film is a multilayer film, the film may include a layer in which at least two kinds of materials are blended.

  For example, a layer in which PP (polypropylene) and PE (polyethylene) are blended is highly divided. Therefore, according to this film, the situation where the breakage of the film is prevented by a layer other than the stretched film layer can be suppressed.

  Moreover, the packaging material according to another situation of this invention is provided with a packaging material main body and a thermoplastic film. The packaging material body accommodates a heating target. The film wraps the object to be heated together with the packaging material body. A half cut line is formed in a part of the film. The half cut line is configured such that the film starts to break from the half cut line when the heating target reaches a predetermined temperature.

  In the film included in the packaging material, when the heating target reaches a predetermined temperature, the film starts to break from the half cut line, and a relatively large hole is formed. Therefore, according to this packaging material, even if the heating target is relatively large, the heating target can be moved through the formed hole.

  In the packaging material, the heating target may include a first heating target and a second heating target. The packaging material body may include a first packaging material body that houses the first heating object and a second packaging material body that houses the second heating object. The second packaging material body may be configured to be attachable to the first packaging material body. The film may be configured to wrap the second heating object together with the second packaging material body.

  In this packaging material, since the film wraps the second heating object together with the second packaging material body, when the film is broken by heating, the second heating object moves from the second packaging material body side to the first packaging material body side. . Therefore, according to this packaging material, even if the 1st and 2nd heating object is comparatively large, the 1st and 2nd heating object can be automatically arranged in the same room by heating.

  The packaging material may be a food container for packaging food cooked by a microwave oven.

  Moreover, the packaging material according to another situation of this invention is provided with a packaging material main body and a packaging bag. The packaging material body packages the first heating object. The packaging bag packages the second heating object. The packaging bag is formed of a thermoplastic film. A half cut line is formed in a part of the film. The half cut line is configured so that the film starts to break from the half cut line when the second heating target reaches a predetermined temperature.

  In this packaging material, heating by a microwave oven is performed, and when the second heating target reaches a predetermined temperature, the half cut line provided in the packaging bag is broken. As a result, the 2nd heating object accommodated in the packaging bag moves in a packaging material main body. Therefore, according to this packaging material, a 2nd heating object can be moved automatically by the heating of a microwave oven.

  It is possible to provide a film and a packaging material that can cope with more combinations among combinations of objects that are preferably arranged in the same room by heating.

It is a perspective view which shows the external appearance structure of the packaged food according to Embodiment 1. FIG. It is a perspective view which shows the external appearance structure of a lower container. It is a perspective view which shows the external appearance structure of an upper side container. It is a perspective view which shows the external appearance structure of the film before adhesion | attachment to an upper side container. It is side sectional drawing which shows the state of the packaged food before food reaches predetermined temperature. It is side sectional drawing which shows the state of the packaged food after food reaches predetermined temperature.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals and description thereof will not be repeated.

[1. Embodiment 1]
<1-1. Composition of packaged food>
FIG. 1 is a perspective view showing an external configuration of packaged food 10 according to the first embodiment. As shown in FIG. 1, the packaged food 10 includes a lower container 20 and an upper container 30. The upper container 30 is configured to be removable from the lower container 20. The user can remove the upper container 30 from the lower container 20 by lifting the upper container 30 upward.

  In the first embodiment, food is stored in each of the lower container 20 and the upper container 30. The packaged food 10 is, for example, frozen food or refrigerated food cooked by a microwave oven.

  In packaged food 10 according to the first embodiment, when packaged food 10 is cooked by a microwave oven, the food stored in upper container 30 automatically moves onto the food stored in lower container 20. (Fall). As the packaged food 10, for example, a food such as “dish udon” or “ankake fried rice” that is preferably placed on one ingredient immediately before the user eats can be considered. Hereinafter, each component of the packaged food 10 will be described in detail.

<1-2. Configuration of lower container>
FIG. 2 is a perspective view showing an external configuration of the lower container 20. As shown in FIG. 2, the lower container 20 has a bowl-like shape with a circular bottom surface, and food 40 is accommodated in the accommodating portion 24 formed inside the opening 22.

  The lower container 20 is created by, for example, thermoforming a resin sheet material. Examples of the resin sheet material include polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl chloride (PVC), polyvinyl acetate (PVAc), polyurethane (PUR), A resin such as ABS resin, AS resin, acrylic resin (PMMA), nylon, EVOH resin, PLA resin, and polycarbonate (PC) is formed into a sheet shape. In addition, the resin-made sheet material may be, for example, the main raw material may be an inorganic material, for example, a material obtained by molding a filler such as an inorganic material (such as talc), starch, or paper into a sheet shape. Further, the resin sheet material may be a composite material including a barrier layer, for example.

<1-3. Configuration of upper container>
FIG. 3 is a perspective view showing an external configuration of the upper container 30. As shown in FIG. 3, the upper container 30 has a bowl-like bottom surface, and a food part 50 is accommodated in a storage part 34 formed inside the opening 32. The upper container 30 may be made using a material similar to that of the lower container 20, for example, or may be made using a material different from that of the lower container 20.

  A film 35 is bonded to the opening 32 by heat sealing. The opening 32 is closed by a film 35.

<1-4. Composition of film>
FIG. 4 is a perspective view showing an external configuration of the film 35 before being bonded to the upper container 30. As shown in FIG. 4, the film 35 has, for example, a rectangular shape before bonding to the upper container 30. For example, after the film 35 is bonded to the opening 32 of the upper container 30, a surplus outer peripheral portion is cut off to form a circular shape.

  The film 35 is a thermoplastic film. The film 35 may be a single layer film or a multilayer film. In any case, the film 35 includes a stretched film layer in at least one of the layers. The layer of the stretched film contained in the film 35 is, for example, uniaxial or biaxially stretched polyester (PET), polypropylene (OPP), nylon (ONY), or ethylene vinyl alcohol copolymer (EVOH).

  When the film 35 is a multilayer film, the film 35 may include a layer in which two kinds of materials are blended in addition to the stretched film layer. As two types of combinations, for example, PE and PP, PE and PS (polystyrene), PP and EVA (ethylene vinyl acetate copolymer), and the like are conceivable. A layer in which these two types of materials are blended has high dividing property.

  A half cut line 37 is formed on the film 35. The half cut line 37 is formed, for example, by applying a laser cut to the film 35.

  The half-cut line 37 is configured so that the film 35 starts to break from the half-cut line 37 when the foods 40 and 50 reach a predetermined temperature during cooking of the packaged food 10 using a microwave oven. That is, when the food 40, 50 is cooked, the temperature of the film 35 rises. As the temperature rises, the film 35 begins to shrink. For example, if the outer periphery of the film 35 is bonded to the opening 32 (FIG. 3) of the upper container 30, the film 35 cannot be shrunk from the outside to the inside. Occurs. The half cut line 37 is configured so that the film 35 starts to be broken from the half cut line 37 by this force.

  The “predetermined temperature” may be, for example, a target temperature at the time of cooking the food 40, 50, or may be a temperature that is several degrees C. to several tens of degrees C. below the target temperature. For example, by setting the predetermined temperature to be several degrees C. to several tens of degrees C. lower than the target temperature, it is possible to reduce the possibility that the film 35 is not torn when the packaged food 10 is cooked.

  The depth and shape of the half-cut line 37 are appropriately determined according to the material of the film 35, the thickness of the film 35, the type of the food 40, 50, the target temperature of the food 40, 50, the size of the food 40, 50, and the like. .

<1-5. Correspondence>
The film 35 is an example of the “film” in the present invention. The half cut line 37 is an example of the “half cut line” in the present invention. The combination of the lower container 20 and the upper container 30 is an example of the “packaging material” in the present invention. The combination of the configuration in which the film 35 is removed from the upper container 30 and the lower container 20 is an example of the “packaging material body” of the present invention. The food 40 is an example of the “first heating target” in the present invention, and the food 50 is an example of the “second heating target” in the present invention. The lower container 20 is an example of the “first packaging material body” in the present invention. The configuration in which the film 35 is removed from the upper container 30 is an example of the “second packaging material body” in the present invention. The packaged food 10 is an example of the “packaged food” of the present invention. The foods 40 and 50 are examples of the “food” of the present invention.

<1-6. Operation during cooking>
The operation | movement at the time of the heat cooking of the packaged food 10 is demonstrated using FIG. FIG. 5 is a side sectional view showing a state of the packaged food 10 before the foods 40 and 50 reach a predetermined temperature. FIG. 6 is a side sectional view showing a state of the packaged food 10 after the foods 40 and 50 reach a predetermined temperature.

  As shown in FIG. 5, before the foods 40 and 50 reach a predetermined temperature, the film 35 is not torn and the food 50 is positioned on the film 35.

  On the other hand, as shown in FIG. 6, after the foods 40 and 50 reach a predetermined temperature, the film 35 is broken (from the half cut line 37 (FIG. 4)), and the food 50 moves (drops) onto the food 40. ) That is, in the packaged food 10, when the food 40, 50 reaches a predetermined temperature, a hole having a size that allows the food 50 to pass through is formed in the film 35. And the foodstuff 50 moves on the foodstuff 40 by passing through this hole.

  Even when the food 50 is relatively large, depending on the range and shape of the half-cut line 37, a large hole through which the food 50 can pass may be formed in the film 35 when the packaged food 10 is cooked. it can. Therefore, according to the packaged food 10, the food 50 can be automatically moved onto the food 40 when the packaged food 10 is cooked.

<1-7. Features>
As described above, the film 35 used for the packaged food 10 according to the first embodiment is a thermoplastic film. A half cut line 37 is formed on a part of the film 35. The half cut line 37 is configured such that the film 35 starts to break from the half cut line 37 when the food 40 and 50 reach a predetermined temperature in a state where the film 35 is used as a part of the upper container 30. Yes.

  In the film 35, when the foods 40 and 50 reach a predetermined temperature, the film 35 starts to break from the half-cut line 37 and a relatively large hole is formed. Therefore, according to the film 35, even if the food 50 is a comparatively large thing, the food 50 can be moved through the formed hole. That is, according to the film 35, it can respond to many combinations among the combinations of the object with which it is preferable to arrange | position in the same chamber (inside the lower container 20) by heating.

[2. Modified example]
Although the first embodiment has been described above, the present invention is not limited to the first embodiment, and various modifications can be made without departing from the spirit of the present invention. Hereinafter, modified examples will be described. However, the following modifications can be combined as appropriate.

<2-1>
In the first embodiment, the film 35 is attached to the upper container 30. However, the film 35 is not necessarily attached to a food container such as the upper container 30. For example, the food 50 may be housed in a bag instead of the upper container 30, and the bag itself may be formed by the film 35. In this case, the food 50 (the heating target) is accommodated in the bag, and a half cut line is formed in a part of the bag. And when the foodstuff 50 reaches predetermined temperature, the film 35 begins to tear from a half cut line. That is, the film 35 should just be used for the packaging material which packages the heating object.

  Moreover, it is good also as a packaging material with the packaging bag formed of the film 35, and the lower container 20. FIG. In this case, the packaging bag is placed on the lower container 20 in which the object to be heated is stored so that the surface on which the half cut line is formed is on the lower side, and is cooked with a microwave oven. Thereby, a hole is formed in the packaging bag, and the heating object accommodated in the packaging bag is placed on the heating object accommodated in the lower container 20. In this case, the packaging bag may be fixed to the lower container 20 with a heat seal or the like, and the lower container 20 and the packaging bag may be integrated. By heating and cooking the integrated packaging material, the heating object accommodated in the packaging bag moves to the lower container 20. And a user can eat the heating object (for example, foodstuff) which moved to the lower container 20 by peeling a packaging bag from the lower container 20.

  A packaging bag having an interior divided into two chambers by a film 35 is also conceivable. In each of the two chambers, for example, different heating objects (for example, food materials) are accommodated. Since the inside of the packaging bag is divided into two chambers by the film 35, the heating object accommodated in each chamber is not mixed before heating. When the packaging bag is cooked by the microwave oven, a hole is formed in the film 35, and the heating objects contained in the respective chambers are mixed. The two rooms may be divided in the up-down direction or the left-right direction.

<2-2>
In the said Embodiment 1, the packaged food 10 shall be heat-cooked with a microwave oven. However, the packaged food 10 does not necessarily have to be cooked in a microwave oven, and may be cooked by hot water, for example. In short, the packaged food 10 may be any food that is cooked and any heating method may be used.

<2-3>
In the first embodiment, the lower container 20 and the upper container 30 contain food, but the accommodation target is not necessarily food. The object accommodated in the lower container 20 and the upper container 30 may be anything that is mixed immediately before use by the user and that does not cause a problem even when heated in a microwave oven or the like.

<2-4>
In the first embodiment, the packaged food 10 may be further packaged with a bag-shaped packaging material. By using a gas barrier material and being accommodated in a bag-like package, it is possible to ensure barrier properties from oxygen.

  10 Packaged Food, 20 Lower Container, 22 Opening, 24 Storage, 30 Upper Container, 32 Opening, 34 Storage, 35, 35A Film, 37, 37A Half Cut Line, 40 Food, 50 Food.

Claims (8)

A thermoplastic film used for a packaging material for packaging a heating object,
A half cut line is formed in a part of the film,
The half cut line is configured such that the film starts to break from the half cut line when the heating object reaches a predetermined temperature in a state where the film is used for the packaging material.   The film according to claim 1, wherein the film is a single-layer stretched film.   The film according to claim 1, wherein the film is a multilayer film and includes a stretched film in at least one of the layers.   The film according to claim 3, wherein the film includes a layer in which at least two kinds of materials are blended. A packaging material body for containing the heating object;
A thermoplastic film for packaging the heating object together with the packaging material body,
A half cut line is formed in a part of the film,
The half-cut line is a packaging material configured so that the film starts to break from the half-cut line when the heating target reaches a predetermined temperature. The heating object includes a first heating object and a second heating object,
The packaging material body includes a first packaging material body that houses the first heating object, and a second packaging material body that houses the second heating object,
The second packaging material body is configured to be attachable to the first packaging material body,
The packaging material according to claim 5, wherein the film is configured to wrap the second heating object together with the second packaging material body.   The packaging material according to claim 5 or 6, wherein the packaging material is a food container for packaging food cooked by a microwave oven. A packaging material body for packaging the first heating object;
A packaging bag for packaging the second heating object,
The packaging bag is formed of a thermoplastic film,
A half cut line is formed in a part of the film,
The half-cut line is a packaging material configured so that the film starts to break from the half-cut line when the second heating target reaches a predetermined temperature.