JP2008265777A - Packaging material for food container with lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material for a food container with a lid capable of certainly securing a container body and a lid body, and having information on its content in an appropriate condition. <P>SOLUTION: The packaging material 1 secures a food container body 50 and a lid body 51 by heat shrinkage at a condition in which the material surrounds the food container configured such that an upper opening of the container body 50 accommodating food is covered by the lid body 51. The packaging material includes a pair of non-heat-shrinkable film portions 10 given with information on the food and opposed to the upper surface and lower surface of the food container, respectively, and a pair of heat-shrinkable film portions 12 opposed to both side surfaces of the food container. Each of the non-heat-shrinkable film portions is connected with adjacent heat-shrinkable film portions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a packaging material for a food container with a lid for packaging a food container with a lid whose upper surface opening of a container body containing food is closed with a lid, and more specifically, heating in a state in which the food container with a lid is enclosed The present invention relates to a packaging material for food containers with a lid that shrinks and integrally fastens a container body and a lid.

  2. Description of the Related Art Conventionally, as a food container for putting food such as lunch boxes, noodles, and salads in the distribution process, a food container with a lid provided with a container body having an upper surface opened and a lid for closing the opening is known. . There are various types of food containers with lids, such as those in which the container main body and the lid body are resin-molded, and those in which a resin film is blow-molded. In general, a lid is fixed to the container body so as not to spill out.

  In this way, a single-sided adhesive tape may be used to fix the lid to the container body, but the adhesive tape can only be partially fixed, and for example, moisture adheres to the outer surface of the food container with a lid. If there is, there is a problem that there is a possibility that it cannot be reliably fixed (the adhesive tape is peeled off). In addition, the belt-shaped resin film is wrapped around a food container with a lid, and the ends of the resin film may be connected to each other via a single-sided adhesive tape or the like to fix the lid to the container body. Depending on how the resin film is wound (winding force), the resin film may fall off, and there is a problem that the lid cannot be securely fixed to the container body.

  In view of such problems, in recent years, packaging materials for lidded food containers made of heat-shrinkable tubes (tubular bodies) have been provided. Such a packaging material for a food container with a lid is fitted on the food container with a lid and heated to shrink in the circumferential direction and integrally fasten the container body and the lid body. .

  And if the whole packaging material (tube) for food containers with a lid has heat shrinkability, the whole food container with lid is deformed by the shrinking action, and one heat shrinkable film and one non-heat shrinkable film A packaging material for a food container with a lid, which is connected (adhered) to a cylindrical shape, is provided. Such a packaging material for a food container with a lid is covered with a food container with a lid so that the heat-shrinkable film corresponds to the lower surface of the food container with a lid, and the heat-shrinkable film is heated and shrunk to heat and shrink the food container with a lid. Both ends of the non-heat-shrinkable film covering the upper surface and both side surfaces of the film are drawn. Thereby, the container main body and the lid are fastened while reducing the tightening force on the food container with lid (see, for example, Patent Document 1).

And any of the packaging materials for food containers with lids can be printed or a label (seal) can be attached to provide predetermined information (images of contents, product names, expiration dates, raw materials, etc.) Information) is added. Since such information is made known to consumers at the time of distribution, in general, information such as the image of the contents and the product name is added to the area of the lidded food container packaging material facing the lid. Information such as the expiration date and raw materials is added to a region facing the lower surface of the container body in the food container packaging material with a lid.
JP 2001-10663 A

  By the way, the packaging material for food containers with a lid having heat shrinkage as a whole shrinks the region to which information is added when packaging the food container with a lid (fastening the container body and the lid). For this reason, there is a problem that information (printing and labeling) is deformed into distortion, leading to a decrease in commercial value. In particular, if the product is reheated at the store (for example, a lunch box), the information may be distorted during reheating at the store, even if the information is properly displayed at the time of shipment. There is a problem that the impression of the product is lowered at the time of handing.

  On the other hand, the packaging material for lidded food containers in which one heat-shrinkable film and one non-heat-shrinkable film are connected to form a cylindrical shape includes the non-heat-shrinkable film in one configuration. Although the information added to will be maintained in an appropriate state, since the heat shrinkable film is provided corresponding to the lower surface of the food container with lid, adding information to the lower surface side of the food container with lid, The information (printing or label) is deformed into distortion due to the shrinkage of the heat-shrinkable film. In addition, since the packaging material for food containers with lids is configured to thermally shrink the heat-shrinkable film disposed corresponding to the lower surface of the food containers with lids, the container body and the lid body are tightened. At the time of wearing (tightening), both ends of the non-heat-shrinkable film located on the lower surface side of the food container with the lid are drawn first, and contact with the lower corner of the food container with the lid causes resistance. End up. As a result, a uniform pulling force is less likely to act on the entire non-heat-shrinkable film, and the container body and the lid body may not be properly and reliably fastened.

  Therefore, in view of such circumstances, the present invention can display predetermined information to be informed to the consumer in an appropriate state, with a lid that can properly and securely fasten the container body and the lid. It is an object to provide a packaging material for food containers.

  The packaging material for a food container with a lid according to the present invention integrally heats and shrinks the container main body and the lid body in a state in which the food container with the lid is closed by closing the upper surface opening of the container main body containing the food. In a packaging material for lidded food containers to be fastened to a pair, a pair of non-heat-shrinkable film portions opposed to the upper and lower surfaces of the lidded food container, and a pair of heat-shrinkable films opposed to both side surfaces of the lidded food container A predetermined information is visibly added to at least one of the pair of non-heat-shrinkable film portions, and each non-heat-shrinkable film portion is connected to the adjacent heat-shrinkable film portion. It is characterized by.

  According to the packaging material for a food container with a lid, a pair of non-heat-shrinkable film portions opposed to the upper and lower surfaces of the food container with a lid, and a pair of heat-shrinkable film portions opposed to both side surfaces of the food container with a lid With the predetermined information visibly added to at least one of the pair of non-heat-shrinkable film parts, each non-heat-shrinkable film part is connected to the adjacent heat-shrinkable film part, The pair of non-heat-shrinkable film parts are enclosed with the lidded food container such that the pair of heat-shrinkable film parts are opposed to the upper and lower surfaces of the lidded food container, and the pair of heat-shrinkable film parts are opposed to both sides of the lidded food container. When heated in a state, the pair of heat-shrinkable film portions shrinks, and the shrinkage force acts to draw the pair of non-heat-shrinkable film portions together. As a result, the container body and the lid body are sandwiched between the pair of non-heat-shrinkable film portions and are integrally fastened. And when a heat-shrinkable film part shrink | contracts, the non-heat-shrinkable film part to which predetermined | prescribed information was added does not shrink | contract and information is maintained in a proper state.

  As one aspect of the present invention, the heat-shrinkable film part and the non-heat-shrinkable film part may be connected to form a cylinder. If it does in this way, a container main body and a cover body can be fastened by heating, after being externally fitted to a food container with a lid.

  As another aspect of the present invention, any one of the pair of non-heat-shrinkable film parts is composed of two films connected to each heat-shrinkable film part, and the two films are connected to each other. You may be comprised so that it may become a cylinder shape. If it does in this way, this food container with a lid was wrapped around the food container with a lid, and two films were connected, so that the food container with a lid was surrounded (it fitted in the food container with a lid). Can be in a state. Thus, the food container with a lid is surrounded by the packaging material for the food container with the lid using a known automatic packaging machine (wrapping machine) configured to wrap the band material around the food container with the lid and connect the end portions. Can be done automatically.

  If at least one of the pair of heat-shrinkable film portions is provided with cutting assisting means capable of cutting in a direction orthogonal to the direction surrounding the food container with the lid, the food container with the lid is enclosed (the container body). The packaging material for a food container with a lid, which is fastened to the lid, can be easily cut by a cutting assisting means, and can be easily opened. In particular, when the perforation is adopted as the cutting assisting means, when the heat-shrinkable film part is thermally shrunk, the cuts (holes) constituting the perforation are enlarged and the substantial part between the cuts is narrowed. It will be easy to do.

  According to the packaging material for food containers with lids according to the present invention, it is possible to display predetermined information to inform consumers in an appropriate state, and to properly and securely fasten the container body and the lid body. An excellent effect of being able to do so can be achieved.

  Hereinafter, a packaging material for food containers with a lid according to an embodiment of the present invention (hereinafter simply referred to as packaging material) will be described with reference to the accompanying drawings.

  As shown in FIG. 1, a packaging material 1 according to the present embodiment packages a food container 5 with a lid that includes a container body 50 having an upper surface opened and a lid 51 that closes the opening. Any of those in which 51 is connected to the opening edge of the container body 50 and can be opened and closed, and those in which the lid 51 is formed separately from the container body 50 are targeted. In addition, the food container 5 with a lid includes various types such as a container body 50 and a lid body 51 that are resin-molded with foamed polystyrene (so-called foamed polystyrene), blow molded from a resin film, etc. If the packaging material 1 which concerns on this embodiment is the food container 5 with a lid | cover provided with the container main body 50 and the cover body 51 as mentioned above, it will not ask | require the material and molding method of the food container 5 with a lid | cover.

  For such a food container 5 with a lid, the packaging material 1 according to the present embodiment is heated and shrunk in a state of surrounding the food container 5 with a lid in which an opening of a container body 50 containing food is closed with a lid 51. The container main body 50 and the lid 51 are fastened together.

  More specifically, the packaging material 1 according to the present embodiment is a pair of non-heat-shrinkable materials opposed to the upper and lower surfaces of the lidded food container 5 as shown in FIGS. 2 (a) and 2 (b). The film parts 10 and 11 and a pair of heat-shrinkable film parts 12 and 13 which are made to oppose the both side surfaces of the food container 5 with a lid are provided.

  Each of the non-heat-shrinkable film portions 10 and 11 is formed in a substantially square shape in plan view, and is formed of a single film that does not substantially heat-shrink. A resin film such as a polyethylene (PE) film or a polypropylene (PP) film can be employed for each of the non-heat-shrinkable film portions 10 and 11. Such a resin film may be non-stretched, uniaxially stretched, or biaxially stretched as long as it has no heat shrinkability, but is preferably biaxially stretched.

  And one non-heat-shrinkable film part 10 is the food container with a lid | cover in the direction (henceforth this direction is called a container circumferential direction) where the length of one direction surrounds the food container 5 with a lid | cover with this packaging material 1. 5 is set to a length equal to or less than half of the entire circumferential length (a length equal to or shorter than the upper surface area of the lid body 51 in this embodiment), and the length in the other direction orthogonal to one direction is the upper surface area of the lid body 51 The following length is set. In the present embodiment, one non-heat-shrinkable film portion 10 is set to have a length in one direction longer than the length in the other direction, and is formed in a rectangular shape in plan view. One non-heat-shrinkable film portion 10 is added with predetermined information P for informing consumers, and in this embodiment, information on food (product) contained in the container body 50 is used. Name, design, etc.) are printed as the predetermined information P.

  In addition, the other non-heat-shrinkable film part 11 has a length in one direction that is half or less of the entire peripheral length of the food container 5 with a lid in the container circumferential direction (in this embodiment, the container body 50 The length in the other direction orthogonal to the one direction is set to a length not more than the lower surface region of the container body 50. In the present embodiment, the other non-heat-shrinkable film portion 11 has a length in one direction set longer than the length in the other direction, and is formed in a rectangular shape in plan view.

  The other non-heat-shrinkable film portion 11 is also provided with predetermined information P for informing the consumer. In this embodiment, information on food contained in the container body 50 ( Raw material, expiration date, etc.) are added as the predetermined information P. Such information P is added by printing or added by sticking a label on which information is printed. In this embodiment, certain information (information whose contents are not changed) P such as raw materials is printed. Indefinite information (information whose contents are changed daily) P such as the expiration date is added by sticking a label.

  In the present embodiment, the lower surfaces of the lid 51 and the container body 50 are set to the same or substantially the same size, and accordingly, the pair of non-heat-shrinkable film portions 10 and 11 have the form and The size is the same.

  Each of the heat-shrinkable film portions 12 and 13 is formed in a substantially quadrangular shape in plan view, and is composed of a single film having heat-shrinkability. For each heat-shrinkable film portion 12, 13, a stretched film such as polyethylene (PE), polyvinylidene chloride (PVDC), polypropylene (PP), polyethylene terephthalate (PET) or the like is employed. The heat-shrinkable film portions 12 and 13 are provided with a directionality at the time of heat shrinking by employing a uniaxial or biaxially stretched stretched film. In this embodiment, a uniaxially stretched film is employed. Heat shrinkability is generally given in one direction.

  And one heat-shrinkable film part 12 is set to the length of one direction below half of the perimeter length of the food container 5 with a lid | cover in the container circumferential direction. In this embodiment, it sets more than the side area (height) of the food container 5 with a lid | cover, and the both ends of this one direction are set to the length which covers a part of upper surface and lower surface of the food container 5 with a lid | cover. . In addition, the length here is the length before heat shrinkage. And in this one heat-shrinkable film part 12, the length of the other direction orthogonal to one direction is set to the length below a side surface area | region. In the present embodiment, the one heat-shrinkable film portion 12 has a length in the other direction set longer than a length in one direction, and is formed in a rectangular shape in plan view.

  The other heat-shrinkable film portion 13 has a length in one direction set to a length equal to or less than half of the entire circumferential length of the food container 5 with a lid in the container circumferential direction. The side area (height) of the food container 5 with lid is set to be equal to or larger than the side area (height), and both end portions in the one direction are set to cover the upper surface and part of the lower surface of the food container 5 with lid. The length here is also the length before heat shrinkage. The other heat-shrinkable film portion 13 has a length in the other direction orthogonal to one direction set to a length equal to or shorter than the side region. In the present embodiment, the other heat-shrinkable film portion 13 has a length in the other direction set longer than a length in one direction, and is formed in a rectangular shape in plan view. In addition, the food container 5 with a lid according to the present embodiment is set to have the same or substantially the same size on both sides (the height around the trunk of the container body 50 is uniform over the entire circumference). The pair of heat-shrinkable film portions 12 and 13 are formed in the same form (rectangular shape in plan view) and size.

  And the packaging material 1 which concerns on this embodiment is formed in the cylinder shape by connecting the non-heat-shrinkable film parts 10 and 11 and the heat-shrinkable film parts 12 and 13 of the said structure alternately. That is, the packaging material 1 has a cylindrical shape in which both ends in one direction of the non-heat-shrinkable film portions 10 and 11 are connected via the heat-shrinkable film portions 12 and 13. The non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film portions 12 and 13 are connected via an adhesive because they are not easily heat-sealed (sealed). In the present embodiment, the non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film portions 12 and 13 are arranged in parallel and overlap each other on the adjacent end portions, and the overlapping portion is an adhesive. Are connected by a band-like region extending in the other direction (hereinafter referred to as connection regions 14a, 14b, 14c, and 14d). Thereby, as for this packaging material 1, four connection area | regions 14a, 14b, 14c, 14d leave a space | interval in the circumferential direction (one direction of the non-heat-shrinkable film parts 10 and 11 and the heat-shrinkable film parts 12 and 13). Is formed.

  The four connection regions 14a, 14b, 14c, and 14d can secure a region for adding information P on the non-heat-shrinkable film portions 10 and 11, and the heat-shrinkable film portions 12 and 13 (packaging material 1). It is formed at a position where the heat shrink function can be exhibited. More specifically, the packaging material 1 is fitted on the food container 5 with a lid so that one non-heat-shrinkable film portion 10 faces the lid 51 and the other non-heat-shrinkable film portion 11 is placed on the container body. 50 and the non-heat-shrinkable film parts 10 and 11 and the heat-shrinkable properties so that the four connection regions 14a, 14b, 14c, and 14d are positioned in the vicinity of the corners of the food container 5 with a lid. The film parts 12 and 13 are connected.

  In the present embodiment, one non-heat-shrinkable film portion 10 that is opposed to the lid 51 is overlapped at one end in one direction with one end in one direction of each of the heat-shrinkable film portions 12 and 13. Are connected to the heat-shrinkable film portions 12 and 13 so that the pair of connection regions 14a and 14b are positioned on both end portions of the upper surface. On the other hand, the other non-heat-shrinkable film part 11 facing the lower surface of the container main body 50 is overlapped at one end in one direction with the other end in one direction of each heat-shrinkable film part 12, 13. Are connected to the heat-shrinkable film portions 12 and 13 so that the pair of connection regions 14c and 14d are positioned on both end portions of the lower surface. Thereby, in a state where the packaging material 1 is fitted on the food container 5 with a lid, the pair of heat-shrinkable film portions 12 and 13 are covered with the lid 51 and the lower surface of the container body 50 at both ends in one direction. Is formed.

  And when opening the packaging material 1 which concerns on this embodiment from the state which packaged the food container 5 with a lid | cover, it can divide | segment at a part of circumferential direction. That is, the packaging material 1 is provided with cutting assisting means 15 for cutting in a direction perpendicular to the circumferential direction (the other direction of the heat-shrinkable film portion 12). The cutting assist means 15 of the present embodiment employs a perforation and is provided on one end side of one heat-shrinkable film portion 12.

  The packaging material 1 which concerns on this embodiment consists of the above structure, Next, the usage method of this packaging material 1 is demonstrated. First, as shown in FIG. 3A, the pair of non-heat-shrinkable film portions 10 and 11 are opposed to the upper and lower surfaces of the food container 5 with a lid (the upper surface of the lid 51 and the lower surface of the container body 50). The packaging material 1 is fitted into a food container 5 with a lid in which food is stored. After that, the lidded food container 5 in which the packaging material 1 is fitted is passed through a known shrink tunnel that heats the path of the lidded food container 5 through a predetermined temperature or higher.

  When the packaging material 1 is heated as it passes through the shrink tunnel, the pair of heat-shrinkable film portions 12 and 13 constituting the packaging material 1 are arranged in one direction (circumferential direction) as shown in FIG. , In close contact with the side surface of the food container 5 with lid, and by further shrinking, in one direction with respect to the non-heat-shrinkable film portions 10 and 11 connected to the heat-shrinkable film portions 12 and 13. A tensile force acts over the entire length or substantially the entire length.

  Then, the pair of non-heat-shrinkable film portions 10 and 11 are attracted to each other by the action of the tensile force, one non-heat-shrinkable film portion 10 is in close contact with the lid 51, and the other non-heat-shrinkable film portion 10 and 11 The shrinkable film portion 11 is in close contact with the lower surface of the container body 50. At this time, while the heat-shrinkable film parts 12 and 13 are heat-shrinked in one direction, the non-heat-shrinkable film parts 10 and 11 are not heat-shrinked, and therefore, in the circumferential direction of the packaging material 1, connection regions 14a and 14b. The relative positions of the lid 51 and the relative positions of the connection areas 14c, 14d and the lower surface of the container body 50 do not change, and the connection areas 14a, 14b, 14c, 14d are arranged around the food container 5 with the lid. Located near the corner of the direction.

  Then, as a result of the packaging material 1 being in close contact with the outer peripheral surface of the lidded food container 5 over the entire circumference, the container body 50 containing the food and the lid body 51 closing the upper surface opening of the container body 50 have both ends. The sides are sandwiched between a pair of non-heat-shrinkable film portions 10 and 11 that are attracted to each other and are in a fastened state. Thus, even if the heat-shrinkable film portions 12 and 13 are shrunk until the packaging material 1 is in close contact with the food container 5 with a lid, the non-heat-shrinkable film portions 10 and 11 are in an initial state without being shrunk. Therefore, the information P regarding the food (product) attached to the non-heat-shrinkable film portions 10 and 11 is not distorted, and the food container 5 with a lid attached with the information P in a state of good visibility is distributed. It will be in the process.

  Moreover, even if food containers 5 with lids (products) containing foods are reheated in a microwave oven or the like in a store or the like, a pair of heat-shrinkable surfaces that oppose the side surfaces of the food containers 5 with lids Since it is only the film parts 12 and 13, even in this situation, the pair of non-heat-shrinkable film parts 10 and 11 positioned on the upper and lower sides are not contracted and distorted, and information P ( The product can be delivered to the consumer in a state of good visibility without distortion of the print or label.

  In this way, the product that has been delivered to the consumer is cut into a strip by dividing the cylindrical packaging material 1 (heat-shrinkable film portion) in the circumferential direction via the cutting assisting means 15, thereby providing food with a lid. Fastening between the lid 51 and the container body 50 of the container 5 is released, and the lid 51 can be removed from the container body 50.

  As described above, the packaging material 1 according to the present embodiment has a pair of non-heat-shrinkable film portions 10 and 11 that are provided with predetermined information P and are opposed to the upper and lower surfaces of the food container 5 with a lid, and a lid. Since it has a pair of heat-shrinkable film parts 12 and 13 that face both side surfaces of the food container 5, each non-heat-shrinkable film part 10 and 11 is connected to the adjacent heat-shrinkable film parts 12 and 13 As a result of the contraction force due to the heat shrinkage of the pair of heat-shrinkable film portions 12 and 13 acting so as to draw the pair of non-heat-shrinkable film portions 10 and 11 together, the container body 50 and the lid body 51 are paired with each other. It can be fastened integrally in a state sandwiched between the non-heat-shrinkable film portions 10 and 11.

  In addition, when the heat-shrinkable film portions 12 and 13 shrink, the non-heat-shrinkable film portions 10 and 11 to which the predetermined information P is added do not shrink, so that the information P is maintained in an appropriate state. Can do. Thereby, the packaging material 1 which concerns on this embodiment can display the predetermined information P notified to a consumer in an appropriate state, and fastens the container main body 50 and the cover body 51 appropriately and reliably. It is possible to achieve an excellent effect of being able to.

  In particular, in this embodiment, since the heat-shrinkable film parts 12 and 13 and the non-heat-shrinkable film parts 10 and 11 are connected and formed into a cylindrical shape, the outer container is simply fitted on the food container 5 with a lid. The food container 5 with a lid can be surrounded and can be easily attached even by manual work.

  Next, the packaging material which concerns on 2nd embodiment of this invention is demonstrated. The packaging material according to this embodiment has the same basic configuration as the packaging material according to the first embodiment except that the other non-heat-shrinkable film part is divided. About the structure which is the same as that of the packaging material of 1st embodiment, or corresponding | corresponding, the same name and the same code | symbol shall be attached | subjected and description shall be omitted and only the other non-heat-shrinkable film part will be demonstrated here.

  As shown in FIG. 4A, the packaging material 1 according to this embodiment is the other non-heat-shrinkable film portion 11 that faces the lower surface of the container body 50 among the pair of non-heat-shrinkable film portions 10 and 11. Is composed of two films 11a and 11b. The two films 11a and 11b are resin films that are not substantially heat-shrinkable, like the non-heat-shrinkable film portions 10 and 11 of the first embodiment, such as polyethylene (PE) and polypropylene (PP). Can be adopted. Such a resin film may be non-stretched, uniaxially stretched, or biaxially stretched as long as it has no heat shrinkability, but is preferably biaxially stretched.

  Of the two films 11a and 11b, one film 11a is connected to the other end of one heat-shrinkable film portion 12 via a connection region 14c, and the other film 11b is heat-shrinkable to the other. The other end of the film part 13 is connected via a connection region 14d. Thereby, the packaging material 1 which concerns on this embodiment is exhibiting strip | belt shape until the food container 5 with a lid | cover is packaged, When fastening the food container 5 with a lid | cover (fastening the container main body 50 and the lid body 51) 4 (b), the ends of the two films 11a and 11b to be the other non-heat-shrinkable film part 11 are connected to each other so that the packaging material 1 is formed into a cylindrical shape. It has become.

  Since the two films 11a and 11b are not heat-shrinkable, the non-heat-shrinkable film portions 11 are formed by heat-sealing the end portions. And as above-mentioned, when these two films 11a and 11b are heat-sealed between the edge parts and become the non-heat-shrinkable film part 11, the shape and size of one non-heat-shrinkable film part 10 are the same. Dimensions are set to be the same or substantially the same. That is, the total length of the two films 11a and 11b excluding the connection allowance that is overlapped and connected to each other is the same as or substantially the same as the length in one direction of the one non-heat-shrinkable film part 10. In this embodiment, the length in one direction of each film 11a, 11b is one non-heat-shrinkable film part except for the connection allowance. It is set to about half of the length in one direction. And the length of the other direction orthogonal to one direction is set to be the same or substantially the same as the length of the other non-heat-shrinkable film part 10 in the other direction.

  The packaging material 1 which concerns on this embodiment consists of the above structure, Next, the usage method of this packaging material 1 is demonstrated. The packaging material 1 according to the present embodiment is formed by cutting a continuous body in which a plurality of packaging materials 1 are continuously arranged in a short direction perpendicular to the longitudinal direction while pulling out from a roll-shaped raw fabric, as described above. Formed. And the produced packaging material 1 is supplied on the food container 5 with a lid | cover, and packaging is carried out so that one non-heat-shrinkable film part 10 may oppose the upper surface of the cover body 51, as shown to Fig.5 (a). The material 1 is arrange | positioned and the both sides are wound around the food container 5 with a lid | cover. If it does so, since the edge part of the two films 11a and 11b will overlap on the lower surface side of the container main body 50, the overlapped part (connection allowance) will be heat-welded with a heat seal bar. This heat welding is performed so as to form a seal line S extending in the other direction, similarly to the connection regions 14a, 14b, 14c, and 14d, and the two films 11a and 11b are connected to form one non-heat-shrinkable film. The conductive film portion 11 is formed.

  In this way, the two films 11a and 11b are connected to each other so that the wrapping packaging material 1 having a strip shape is formed in a cylindrical shape around the food container 5 with a lid, and is fitted into the food container 5 with a lid. Become.

  As described above, to wrap the packaging material 1 having a band shape around the food container 5 with a lid, it can be naturally performed manually, but the packaging material 1 made of a single band material is attached to the food container 5 with a lid. A known automatic packaging machine for winding can be used. And the heat-sealing bar which connects two film 11a, 11b is provided so that the back | latter stage of the winding process of the packaging material 1 by an automatic packaging machine can be performed, and the packaging material 1 of this embodiment is with a cover automatically. The food container 5 can be fitted.

  Thus, after making the food container 5 with a lid | cover enclosed with the packaging material 1, the food container 5 with a lid | cover enclosed by the packaging material 1 is passed through a well-known shrink tunnel. When the packaging material 1 is heated as it passes through the shrink tunnel, the pair of heat-shrinkable film portions 12 and 13 constituting the packaging material 1 are arranged in one direction (circumferential direction) as shown in FIG. ) In one direction with respect to the non-heat-shrinkable film parts 10 and 11 connected to the heat-shrinkable film parts 12 and 13. The pulling force acts over the entire length or substantially the entire length.

  Then, the pair of non-heat-shrinkable film portions 10 and 11 are attracted to each other by the action of the tensile force, one non-heat-shrinkable film portion 10 is in close contact with the lid 51, and the other non-heat-shrinkable film portion 10 and 11 The shrinkable film portion 11 is in close contact with the lower surface of the container body 50. At this time, while the heat-shrinkable film parts 12 and 13 are heat-shrinked in one direction, the non-heat-shrinkable film parts 10 and 11 are not heat-shrinked, and therefore, in the circumferential direction of the packaging material 1, connection regions 14a and 14b. The relative positions of the lid 51 and the relative positions of the connection areas 14c, 14d and the lower surface of the container body 50 do not change, and the connection areas 14a, 14b, 14c, 14d are arranged around the food container 5 with the lid. Located near the corner of the direction.

  Then, as a result of the packaging material 1 being in close contact with the outer peripheral surface of the lidded food container 5 over the entire circumference, the container body 50 containing the food and the lid body 51 closing the upper surface opening of the container body 50 have both ends. The sides are sandwiched between a pair of non-heat-shrinkable film portions 10 and 11 that are attracted to each other and are in a fastened state. Thus, even if the heat-shrinkable film portions 12 and 13 are shrunk until the packaging material 1 is in close contact with the food container 5 with a lid, the non-heat-shrinkable film portions 10 and 11 are in an initial state without being shrunk. Therefore, the information P regarding the food (product) attached to the non-heat-shrinkable film portions 10 and 11 is not distorted, and the food container 5 with a lid attached with the information P in a state of good visibility is distributed. It will be in the process.

  Moreover, even if food containers 5 with lids (products) containing foods are reheated in a microwave oven or the like in a store or the like, a pair of heat-shrinkable surfaces that oppose the side surfaces of the food containers 5 with lids Since only the film parts 12 and 13 are present, even in this situation, the pair of non-heat-shrinkable film parts 10 and 11 positioned above and below are not distorted, and information P (printing or labeling) added thereto ) Is not distorted, and the product can be delivered to the consumer in a state in which the information P is well-viewed.

  In this way, in order to open the product over the consumer, the packaging material 1 (heat-shrinkable film portion) that has been in a cylindrical shape is cut in the circumferential direction via the cutting assisting means 15 and developed into a band shape. Then, the fastening of the lid 51 of the food container 5 with lid and the container main body 50 is released, and the consumer can remove the lid 51 from the container main body 50.

  As described above, the packaging material 1 according to this embodiment has a pair of non-heat-shrinkable films to which the predetermined information P is added and is opposed to the upper and lower surfaces of the food container 5 with a lid, as in the first embodiment. The heat-shrinkable film part 12 is provided with a pair of heat-shrinkable film parts 12 and 13 that face the opposite side surfaces of the food containers 5 with lids, and the non-heat-shrinkable film parts 10 and 11 are adjacent to each other. , 13, the shrinkage force due to the heat shrinkage of the pair of heat-shrinkable film portions 12, 13 acts to draw the pair of non-heat-shrinkable film portions 10, 11 together, resulting in the container body 50. And the lid 51 can be fastened together with the pair of non-heat-shrinkable film portions 10 and 11 sandwiched therebetween.

  In addition, when the heat-shrinkable film portions 12 and 13 shrink, the non-heat-shrinkable film portions 10 and 11 to which the predetermined information P is added do not shrink, so that the information P is maintained in an appropriate state. Can do. Thereby, the packaging material 1 which concerns on this embodiment can display the predetermined information P notified to a consumer in an appropriate state similarly to 1st embodiment, and can display the container main body 50 and the cover body 51. An excellent effect of being able to fasten properly and reliably can be obtained.

  In particular, in the present embodiment, the other non-heat-shrinkable film portion 11 is composed of two films 11a and 11b connected to the pair of heat-shrinkable film portions 12 and 13, respectively, and has a strip shape. Since the end portions of the two films 11a and 11b are connected to each other when the container 5 is surrounded, the tube 5 is formed into a cylindrical shape. Automatic processing can be performed using a known automatic packaging machine (a packaging machine configured to wind a band around the food container 5 with a lid).

  In addition, the packaging material for food containers with a lid of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In the first and second embodiments, the connection regions 14a and 14b that connect one non-heat-shrinkable film part 10 and the heat-shrinkable film parts 12 and 13 are located on the lid 51, and the other non-heat-shrinkable. The non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film are arranged so that the connection regions 14c and 14d for connecting the shrinkable film portion 11 and the heat-shrinkable film portions 12 and 13 are located on the lower surface of the container body 50. Although it connected to the parts 12 and 13, it is not limited to this, For example, it is a non-heat so that each connection area | region 14a, 14b, 14c, 14d may become a position facing the side surface of the food container 5 with a lid | cover. The shrinkable film parts 10 and 11 and the heat-shrinkable film parts 12 and 13 may be connected. Further, of the four connection regions 14a, 14b, 14c, and 14d, non-heat-shrinkable so that either the upper surface side or the lower surface side of the food container 5 with a lid faces the side surface of the food container 5 with a lid. You may make it connect the film parts 10 and 11 and the heat-shrinkable film parts 12 and 13. FIG.

  In the first and second embodiments, the cutting assistance means 15 is provided. However, the present invention is not limited to this, and the cutting assistance means 15 may be provided as necessary. However, it goes without saying that it is preferable to provide the cutting assisting means 15 in view of the ease of opening. And when providing the cutting assistance means 15, it is not limited to what provided the cutting assistance means 15 only in one heat-shrinkable film part 12, but it is a cutting assistance in the other heat-shrinkable film part 13 of the other side. Of course, the means 15 may be provided, or the cutting assisting means 15 may be provided on both the pair of heat-shrinkable film portions 12 and 13. Furthermore, the cutting assistance means 15 is not limited to that provided in the heat-shrinkable film portions 12 and 13, and the cutting assistance means 15 may be provided in the non-heat-shrinkable film portions 10 and 11. Good. And the cutting | disconnection assistance means 15 is not limited to a perforation, For example, you may comprise with the half cut which made thickness thin partially, or may comprise with a cut tape.

  In the first and second embodiments, the perforation as the cutting assisting means 15 is provided and can be divided at the time of opening. For example, the non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film portions 12 and 13 are used. At least one of the four connection regions 14a, 14b, 14c, and 14d that connect to each other may be detachably connected. As described above, even if the non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film portions 12 and 13 can be peeled, the continuous packaging material 1 can be divided. In this case, it is only necessary to employ an adhesive that allows the non-heat-shrinkable film portions 10 and 11 and the heat-shrinkable film portions 12 and 13 to be peeled while resisting the heat shrinkage of the heat-shrinkable film portions 12 and 13. . And when peeling the connection area | region 14a, 14b, 14c, 14d in this way and dividing the packaging material 1, the non-heat-shrinkable film part 10, 11 adjacent to the connection area | region 14a, 14b, 14c, 14d, or heat shrinkage | contraction If the edge part located outside the adhesive film parts 12 and 13 is made to be a grip piece without bonding, it can be easily peeled off.

  In said 1st and 2nd embodiment, the non-heat-shrinkable film part 10 so that the length of one direction used as the direction which surrounds the food container 5 with a lid | cover becomes longer than the length of the other direction orthogonal to this one direction. 11 is formed in a rectangular shape, but is not limited thereto. For example, the non-heat-shrinkable film portions 10 and 11 are formed in the same length in one direction and the other direction, that is, in a square shape. Alternatively, the non-heat-shrinkable film portions 10 and 11 may be formed in a rectangular shape whose length in one direction is shorter than the length in the other direction. However, it goes without saying that the form and size are set after an area to which the predetermined information P can be added is secured. Similarly, the heat-shrinkable film portions 12 and 13 may be appropriately determined in consideration of the size and form of the food container 5 with a lid.

  In said 1st and 2nd embodiment, although the form and size of a pair of non-heat-shrinkable film parts 10 and 11 were set to the same or substantially the same, it is not limited to this, Each food container 5 with a lid | cover In consideration of the shape and size of the upper and lower surfaces, different shapes and sizes may be set. The same applies to the pair of heat-shrinkable film portions 12 and 13.

  In said 1st and 2nd embodiment, although a pair of non-heat-shrinkable film parts 10 and 11 were each comprised independently, and it connected via the heat-shrinkable film parts 12 and 13, it is limited to this. Rather, for example, the non-heat-shrinkable film portions 10 and 11 are connected via the same kind of film, and the heat-shrinkable film to be the heat-shrinkable film portions 12 and 13 is superposed on the film to be non-heat-shrinkable. You may make it connect (adhere) the both ends of a heat-shrinkable film on the boundary with the film parts 10 and 11 or the boundary vicinity.

  That is, two heat-shrinkable films are overlapped on a continuous belt-like non-heat-shrinkable film in the longitudinal direction, and both ends of each heat-shrinkable film are bonded to the non-heat-shrinkable film. By doing so, each heat-shrinkable film becomes the heat-shrinkable film parts 12 and 13, and non-heat-shrinkable film parts 10 and 11 are formed between the heat-shrinkable films. In this way, if the heat-shrinkable film portions 12 and 13 shrink in a state of surrounding the food container 5 with the lid, the non-heat-shrinkable film in the portion where the heat-shrinkable film portions 12 and 13 are superposed is heat-shrinked. Since the non-heat-shrinkable film portions 10 and 11 are attracted to bend (become wrinkled) to absorb the difference from the conductive film portions 12 and 13, the same operations and effects as the above-described embodiments are achieved. However, in this case, as described above, the overlapping portion of the heat-shrinkable film portions 12 and 13 bends, so that the heat-shrinkable film constituting the heat-shrinkable film portions 12 and 13 is attached to the outer surface side. It is also preferable to color the heat-shrinkable film portions 12 and 13 to hide wrinkles on the inner film.

  And in said 1st and 2nd embodiment, although predetermined information P was added to each of a pair of non-heat-shrinkable film parts 10 and 11, it is not limited to this, Information P may be added to any one of the heat-shrinkable film portions 10 and 11.

  In the second embodiment, the form and size of the two films 11a and 11b, which are the other non-heat-shrinkable film part 11 that faces the lower surface of the food container 5 with the lid by connecting, are configured to be the same or substantially the same. In the state where the non-heat-shrinkable film portion 11 is formed, the connection allowance (seal line S) is positioned at the center thereof, but the size and form of the two films 11a and 11b are limited to this. For example, when the length in one direction of one of the films 11a and 11b is set to be longer than the length in one direction of the other film 11a and 11b, the non-heat-shrinkable film portion 11 is obtained. In addition, the connection allowance (seal line S) may be displaced to one of the heat-shrinkable film portions 12 and 13 side. However, it is a premise that the display of the information P added to the non-heat-shrinkable film part 11 is not hindered.

  Furthermore, in 2nd embodiment, although the other non-heat-shrinkable film part 11 which opposes the lower surface of the food container 5 with a lid | cover was comprised with two films 11a and 11b, it is not limited to this, For example, The one non-heat-shrinkable film portion 10 facing the upper surface of the food container 5 with a lid may be composed of two films. However, one non-heat-shrinkable film part 10 is different from the other non-heat-shrinkable film part 11 in that information about the product is often directly connected to the product image, so that there is a sufficient area for displaying information. In order to ensure, similarly to the second embodiment, the other non-heat-shrinkable film part 11 is constituted by two films 11a and 11b, or one non-heat-shrinkable film part 10 is formed by two sheets. When it comprises with a film, it is preferable to make it the position which the position of the connection of the film displaced to the heat shrinkable film part 12 and 13 side.

  In the second embodiment, when packaging the food container 5 with a lid, the two films 11a and 11b to be the other non-heat-shrinkable film part 11 are heat-sealed. However, the present invention is not limited to this. Instead, for example, the two films 11a and 11b may be bonded via an adhesive. However, since the non-heat-shrinkable film portion 11 is different from the heat-shrinkable film portions 12 and 13 in that it has heat-weldability, it is more efficient in terms of production efficiency to connect by heat sealing as in the above embodiment. It is.

  The packaging material 1 according to the present invention is based on the premise that the information P is added to at least one of the upper surface side and the lower surface side of the food container 5 with a lid. When it is added only to the upper surface side of the food container 5, the other non-heat-shrinkable film part 11 and the pair of heat-shrinkable film parts 12 and 13 referred to in the above embodiment are a continuous belt-like heat-shrinkable film. It is also possible to employ a packaging material that is configured and has both end portions connected to one non-heat-shrinkable film portion 10. This packaging material also has a belt-like shape until the food container 5 with a lid is packaged (the container body 50 and the lid body 51 are fastened), like the packaging material 1 according to the second embodiment. As well as work, automatic processing can be performed by using a conventionally known automatic packaging machine (a packaging machine configured to wind a band around the food container 5 with a lid).

The perspective view of the state (state which fastened the container main body and the lid) of the food container with a lid by the packaging material for food containers with a lid concerning a first embodiment of the present invention is shown. It is explanatory drawing of the packaging material for food containers with a lid concerning a first embodiment, (a) shows the perspective view seen from the side used as the upper surface at the time of packaging, and (b) from the side used as the lower surface at the time of packaging. A perspective view is shown. It is explanatory drawing for demonstrating the process at the time of packaging a food container with a lid | cover with the packaging material for food containers with a lid | cover which concerns on 1st embodiment, Comprising: (a) is a packaging material for lidded food containers with a lid | cover. The front view of the state which fitted by the food container is shown, (b) shows the front view of the state which the packaging material for food containers with a lid | cover thermally contracted, and the container main body and the cover body were fastened. It is explanatory drawing of the packaging material for food containers with a lid which concerns on 2nd embodiment of this invention, Comprising: (a) shows the top view of the state before packaging a food container with a lid, (b) is a cylinder. The perspective view seen from the side used as a lower surface at the time of packaging in the state made into the shape is shown. It is explanatory drawing for demonstrating the process at the time of packaging a food container with a lid | cover with the packaging material for food containers with a lid | cover which concerns on 2nd embodiment, Comprising: (a) is a packaging material for lidded food containers with a lid | cover. The front view of the state which fitted by the food container is shown, (b) shows the front view of the state which the packaging material for food containers with a lid | cover thermally contracted, and the container main body and the cover body were fastened.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Packaging material, 5 ... Food container with a lid, 10, 11 ... Non heat-shrinkable film part, 12, 13 ... Heat-shrinkable film part, 14a, 14b, 14c, 14d ... Connection area | region, 15 ... Cutting assistance means, 11a, 11b ... film, 50 ... container body, 51 ... lid

Claims (4)

  In a packaging material for a lidded food container that heats and shrinks in a state of enclosing a lidded food container in which the top opening of the container body containing food is closed with a lid, and fastens the container body and the lid integrally, A pair of non-heat-shrinkable film portions opposed to the upper and lower surfaces of the food container with lid, and a pair of heat-shrinkable film portions opposed to both side surfaces of the food container with lid, and a pair of non-heat-shrinkable film portions A packaging material for a food container with a lid, wherein predetermined information is visibly added to at least one of the above, and each non-heat-shrinkable film part is connected to an adjacent heat-shrinkable film part.   The packaging material for food containers with a lid according to claim 1, wherein the heat-shrinkable film part and the non-heat-shrinkable film part are connected to form a cylinder.   Either one of the pair of non-heat-shrinkable film parts is composed of two films connected to each heat-shrinkable film part, and is configured to be cylindrical by connecting the two films The packaging material for food containers with a lid according to claim 1.   The cutting auxiliary means capable of cutting in a direction orthogonal to the direction surrounding the food container with a lid is provided in at least one of the pair of heat-shrinkable film portions. The packaging material for food containers with a cover described.

Images