JP2021160724A - Packaging bag - Google Patents

Abstract

To provide a packaging bag that is aesthetically pleasing and can improve a sense of beauty, that is concealable and can make it impossible to be seen from the outer surface to the inner surface, and that can transmit microwaves without reflecting them.SOLUTION: A packaging bag 10A is made of a composite film 20A, which is formed of: a first synthetic resin film made from thermoplastic synthetic resin that constitutes an inner surface of the packaging bag 10A; a tin deposition film having a tin deposition layer and bonded to an outer surface of the first synthetic resin film; and a printing film 24, which constitutes an outer surface 28 of the packaging bag 10A and has a printing surface on which a predetermined drawing is printed and is bonded to the outer surface of the tin vapor-deposited film. In the packaging bag 10A, microwaves can penetrate the tin vapor-deposited film, and a to-be-heated object contained in a containment space 15 can be heated by microwave irradiation.SELECTED DRAWING: Figure 1

Description

The present invention relates to a packaging bag containing a predetermined object to be heated.

It is a laminate having an aluminum vapor-deposited film layer and having at least one base material layer outside the aluminum vapor-deposited film layer as a hydrophobic layer, and the laminate is optionally a first thermoplastic polymer layer. Formed from a typical ink layer, a hydrophobic anchor coat layer, a polyethylene layer, an aluminum vapor deposition film layer, an anchor coat layer, a polyethylene layer, and a second thermoplastic polymer layer as a sealant, from the outer surface to the inner side. A packaging material for foods in which a first thermoplastic polymer layer and a second thermoplastic polymer layer are laminated in this order toward the surface is disclosed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2008-273549

In the packaging material disclosed in Patent Document 1, the packaging material has a gloss due to the aluminum-deposited film layer, the beauty of the packaging material is improved by the cosmeticity of the aluminum-deposited film layer, and the packaging material is packaged by the concealing property of the aluminum-deposited film layer. It is possible to make it impossible to visually recognize the material from the other surface (outer surface) to one surface (inner surface). However, when this packaging material is used as a raw material for a packaging bag containing food and the food (object to be heated) filled in the packaging bag made thereby is heated in a microwave oven, FIG. 11 shows. Explaining the reflection of microwaves in the aluminum-deposited film layer As shown in the figure, the microwave emitted from the microwave oven is reflected by the aluminum-deposited film layer, and as shown by the arrow Z2 in FIG. 11, the microwave is aluminum-deposited. It cannot pass through the film layer, the microwave does not reach the food (heated object), and the food (heated object) cannot be heated.

In addition, when an IC tag is attached to this packaging material and the IC tag is used to manage inventory, inventory, sales, etc., the aluminum-deposited film layer acts as an antenna to diffuse radio waves (radio wave interference). As a result, the IC tag malfunctions and various data stored in the IC tag cannot be read smoothly by the IC tag reader, or radio waves are blocked by the aluminum vapor-deposited film layer, and the IC tag and the IC tag reader cannot communicate with each other. Therefore, it is not possible to collectively manage inventory, inventory, sales, etc. using IC tags.

An object of the present invention is to have cosmetic properties to improve aesthetics, to have concealing properties to make it impossible to see from the outer surface to the inner surface, and to prevent microwaves from being reflected. Is to provide a packaging bag capable of permeating. Another object of the present invention is to provide a packaging bag which has a barrier function against ultraviolet rays, can block ultraviolet rays, and can prevent deterioration of an object to be heated, changes in physical properties, and changes in taste. Another object of the present invention is packaging that can prevent malfunction of the IC tag, prevent radio wave interruption, and can collectively manage inventory, inventory, sales, etc. by using the IC tag. To provide a bag.

The premise of the present invention for solving the above-mentioned problems is a packaging bag for accommodating a predetermined object to be heated.

The features of the present invention in the above premise are that the packaging bag has a first synthetic resin film made of a thermoplastic synthetic resin and constitutes an inner surface of the packaging bag, and an outer surface of the first synthetic resin film having a tin vapor deposition layer. Made from a composite film formed from a tin vapor-deposited film bonded to the outer surface of the tin vapor-deposited film and a printing film formed on the outer surface of the packaging bag and having a printed surface on which a predetermined drawing is printed. It is to be done.

As an example of the present invention, the packaging bag is made of a composite film in which the first synthetic resin films are overlapped with each other facing each other, and the sealing portion in which the first synthetic resin films located at the peripheral edge of the packaging bag are fused together. And a storage space located inside the seal portion for accommodating the object to be heated.

As another example of the present invention, in the packaging bag, the tin-deposited film can transmit microwaves, and the object to be heated housed in the storage space can be heated by irradiation with microwaves.

As another example of the present invention, in the packaging bag, radio waves can be transmitted through the tin-deposited film, and communication is possible between the electronic data reading device and the electronic data storage medium attached to the packaging bag.

As another example of the present invention, in the packaging bag, the first synthetic resin film and the tin vapor-deposited film are bonded by a transparent first adhesive layer applied to one of the films, and the tin vapor-deposited film and the printing film are formed. Is joined by a transparent second adhesive layer applied to any of these films.

As another example of the present invention, the composite film contains a UV blocking agent layer that blocks ultraviolet rays, and the UV blocking agent layer is applied to either a printing film or a second adhesive layer, or a second. It is applied to either the adhesive layer and the tin vapor-deposited film, or is applied to either the tin-deposited film and the first adhesive layer.

As another example of the present invention, a tin-deposited film is vapor-deposited on either a second synthetic resin film made of a transparent thermoplastic synthetic resin and an inner surface or an outer surface of the second synthetic resin film. It is formed from a tin vapor deposition layer.

As another example of the present invention, on the surface of the second synthetic resin film on which tin is vapor-deposited, an existing portion where the tin-deposited layer exists and a non-existing portion where the tin-deposited layer does not exist are formed. The surface of the second synthetic resin film is covered with the tin vapor deposition layer, and in the non-existent portion, the surface of the second synthetic resin film is exposed and the second synthetic resin film and the first synthetic resin film or the printing film face each other. There is.

As another example of the present invention, the ratio of the presence portion of the tin-deposited layer to the unit area of the second synthetic resin film is in the range of 75 to 97%, and the tin-deposited layer is not included in the unit area of the second synthetic resin film. The proportion of the present site is in the range of 3 to 25%.

As another example of the present invention, the tin-deposited layer is colorless silver or colored silver, and the tin-deposited film has glossy or semi-glossy properties to improve the aesthetic appearance, and from the outer surface of the packaging bag. It has a concealing property that makes it impossible to see the inner surface.

As another example of the present invention, the printing film is a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property, and a predetermined drawing is printed on the lower surface of the transparent vapor-deposited film.

As another example of the present invention, the thickness dimension of the first synthetic resin film is in the range of 45 to 55 μm, and the thickness dimension of the tin-deposited film and the printing film is in the range of 10 to 14 μm.

As another example of the present invention, the thickness dimension of the first and second adhesive layers and the UV blocking agent layer is in the range of 2 to 4 μm.

According to the packaging bag according to the present invention, a first synthetic resin film made of a thermoplastic synthetic resin, a tin vapor-deposited film having a tin vapor-deposited layer and bonded to the outer surface of the first synthetic resin film, and a predetermined drawing are formed. Made from a composite film formed from a printed film having a printed surface and bonded to the outer surface of the tin-deposited film, the tin-deposited film makes the packaging bag glossy or semi-glossy, of the tin-deposited film. The beauty of the packaging bag can be improved, and the concealing property of the tin-deposited film makes it impossible to see from the outer surface to the inner surface of the packaging bag, and the tin-deposited film does not reflect microwaves. , Microwaves can be transmitted. When the heating object contained in the packaging bag is heated in the microwave oven, the microwave oven radiated from the microwave oven can be transmitted through the packaging bag, so that the heating object can be sufficiently heated in the microwave oven. Even if an IC tag is attached to the packaging bag, the tin-film vapor deposition film can prevent the IC tag from malfunctioning without radiating radio waves diffusely, and various data stored in the IC tag by the IC tag reader can be smoothly processed. In addition to being readable, the tin-film vapor deposition film does not block radio waves, enabling communication between the IC tag and the IC tag reader, and the IC tag can be used to collectively manage inventory, inventory, sales, etc. ..

The packaging bag is made of a composite film that overlaps with the first synthetic resin films facing each other, and is located inside the sealing part and the sealing part where the first synthetic resin films are fused together, which is located at the peripheral edge of the packaging bag. In the packaging bag having a storage space for accommodating the object to be heated, the tin vapor-deposited film can transmit the microwave without reflecting the microwave, and therefore the object to be heated housed in the storage space of the packaging bag. The object can be reliably heated in the microwave. In the packaging bag, the peripheral portion of the packaging bag can be firmly sealed by fusing the first synthetic resin films made of the thermoplastic synthetic resin to each other at the sealing portion, and the peripheral portion can be inadvertently torn or torn. It can prevent peeling.

The packaging bag, in which the tin vapor-deposited film is permeable to microwaves and the object to be heated housed in the storage space can be heated by irradiation with microwaves, heats the object to be heated housed in the storage space in a microwave oven. In this case, since the microwave emitted from the microwave oven can pass through the tin vapor deposition film, the object to be heated can be reliably heated in the microwave oven.

The packaging bag is capable of transmitting radio waves through the tin-deposited film and communicating between the electronic data reader and the electronic data storage medium attached to the packaging bag, without the tin-deposited film emitting diffuse radio waves. It is possible to prevent malfunction of electronic data storage media such as IC tags, and it is possible to smoothly read various data stored in electronic data storage media such as IC tags by an electronic data reading device such as an IC tag reader. The vapor-deposited film does not block radio waves, enabling communication between electronic data storage media such as IC tags and electronic data readers such as IC tag readers, and inventory and inventory using electronic data storage media such as IC tags. , Sales, etc. can be managed collectively.

The first synthetic resin film and the tin vapor-deposited film are bonded by a transparent first adhesive layer applied to one of the films, and the tin vapor-deposited film and the printing film are applied to one of the films. In the packaging bag bonded by the second adhesive layer, the first synthetic resin film and the tin vapor-deposited film can be firmly bonded by the first adhesive layer, and the tin vapor-deposited film is printed by the second adhesive layer. Since the films can be firmly bonded to each other, it is possible to prevent inadvertent peeling of the films. In the packaging bag, the first and second adhesive layers together with the tin-film vapor deposition film do not reflect radio waves, and the object to be heated housed in the storage space of the packaging bag can be sufficiently heated by a microwave oven. Even if the IC tag is attached to the packaging bag, the IC tag can be prevented from malfunctioning without the first and second adhesive layers radiating radio waves diffusely together with the tin vapor deposition film. Various stored data can be read smoothly, the first and second adhesive layers do not block radio waves together with the tin-film vapor deposition film, and communication between the IC tag and the IC tag reader becomes possible, and the IC tag is used. It is possible to collectively manage inventory, inventory, sales, etc.

The composite film contains a UV blocking agent layer that blocks ultraviolet rays, and the UV blocking agent layer is applied to either the printing film and the second adhesive layer, or the second adhesive layer and the tin vapor deposition film are used. The packaging bag coated on any of them, or on either of the tin vapor-deposited film and the first adhesive layer, is a UV-cutting agent layer (transparent UV-cutting agent layer, translucent UV). The packaging bag has a barrier function against ultraviolet rays due to the cutting agent layer (opaque UV blocking agent layer) and can block the ultraviolet rays, and the deterioration and physical properties of the object to be heated contained in the packaging bag made of the composite film. Changes, and changes in taste can be prevented. In the packaging bag, the UV-blocking agent layer does not reflect radio waves together with the tin-film vapor deposition film, and the object to be heated contained in the storage space of the packaging bag can be sufficiently heated by a microwave oven, and the packaging bag can be used. Even if the IC tag is attached, the UV-cutting agent layer together with the tin-film vapor deposition film does not diffuse radio waves, and the IC tag can be prevented from malfunctioning, and various data stored in the IC tag by the IC tag reader can be smoothly processed. It can be read, the UV blocking agent layer does not block radio waves together with the tin-film vapor deposition film, communication between the IC tag and the IC tag reader becomes possible, and the IC tag can be used to collectively manage inventory, inventory, sales, etc. can do.

The tin-deposited film is formed of a second synthetic resin film made of a transparent thermoplastic synthetic resin and a tin-deposited layer deposited on either the inner surface or the outer surface of the second synthetic resin film. In the packaging bag, the tin-deposited layer deposited on any of the inner and outer surfaces of the second synthetic resin film makes the packaging bag glossy or semi-glossy, and the cosmeticity of the tin-deposited layer gives the packaging bag a beautiful appearance. It can be improved, and the hiding property of the tin-deposited layer makes it impossible to see from the outer surface to the inner surface of the packaging bag, and the tin-deposited layer does not reflect the microwave and transmits the microwave. Can be done. When the heating object contained in the packaging bag is heated in the microwave oven, the microwave oven radiated from the microwave oven can be transmitted through the packaging bag, so that the heating object can be sufficiently heated in the microwave oven. Even if an IC tag is attached to the packaging bag, the tin vapor deposition layer can prevent the IC tag from malfunctioning without radiating radio waves diffusely, and various data stored in the IC tag by the IC tag reader can be smoothly processed. It can be read, the tin vapor deposition layer does not block radio waves, communication between the IC tag and the IC tag reader becomes possible, and inventory, inventory, sales, etc. can be collectively managed using the IC tag.

The existing portion where the tin vapor-deposited layer exists and the non-existing portion where the tin-deposited layer does not exist are formed on the tin-deposited surface of the second synthetic resin film, and in the existing portion, the surface of the second synthetic resin film is the tin-deposited layer. In the non-existent portion, the packaging bag in which the surface of the second synthetic resin film is exposed and the second synthetic resin film and the first synthetic resin film or the printing film face each other is a packaging bag of the second synthetic resin film. When the object to be heated contained in the packaging bag made of the composite film is heated in the microwave because the microwave emitted from the microwave can be transmitted in the non-existent part where the tin vapor deposition layer does not exist. , The object to be heated can be sufficiently heated in the microwave, and even if the IC tag is attached to the packaging bag, the tin vapor-deposited layer does not diffuse radio waves, and the IC tag can be prevented from malfunctioning. , Various data stored in the IC tag can be smoothly read by the IC tag reader, the tin film-deposited layer does not block radio waves, and communication between the IC tag and the IC tag reader becomes possible, and the IC tag is used. It is possible to collectively manage inventory, inventory, sales, etc. In the packaging bag, the tin-deposited layer at the forming site makes the packaging bag glossy or semi-glossy, the cosmeticity of the tin-deposited layer can improve the aesthetic appearance of the packaging bag, and the concealing property of the tin-deposited layer makes the packaging bag. It is possible to make it impossible to see from the outer surface to the inner surface.

The ratio of the presence portion of the tin vapor deposition layer to the unit area of the second synthetic resin film is in the range of 75 to 97%, and the ratio of the non-existence portion of the tin vapor deposition layer to the unit area of the second synthetic resin film is 3 to 25%. In the packaging bag in the range of, since the ratio of the presence portion of the tin vapor deposition layer to the unit area of the second synthetic resin film is in the above range, the composite film is given gloss or semi-gloss by the tin vapor deposition layer in the presence portion. The cosmeticity of the tin-deposited layer at the portion where the ratio is present can improve the aesthetic appearance of the packaging bag, and the concealing property of the tin-deposited layer at the portion where the proportion is present makes it possible to visually recognize the packaging bag from the outer surface to the inner surface. Can be disabled. In the packaging bag, the ratio of the non-existent portion of the tin vapor-deposited layer to the unit area of the second synthetic resin film is in the above range, and the microwave emitted from the microwave oven can be reliably transmitted in the non-existent portion of the ratio. Therefore, when the object to be heated contained in the packaging bag is heated in the microwave oven, the object to be heated can be reliably heated in the microwave oven, and even if the IC tag is attached to the packaging bag, the non-existent part is present. It is possible to prevent the IC tag from malfunctioning without disturbing the radio wave, and the IC tag reader can smoothly read various data stored in the IC tag. The vapor-deposited film does not block radio waves, communication between the IC tag and the IC tag reader becomes possible, and the IC tag can be used to collectively manage inventory, inventory, sales, and the like.

The tin-film-deposited layer is colorless silver-colored or colored-silver-colored, and the tin-film-deposited film has glossy or semi-glossy properties to improve the aesthetic appearance, and also has a concealing property that makes it impossible to see from the outer surface to the inner surface. Since the tin-deposited layer of the packaging bag is colorless silver or colored silver, the tin-deposited layer can impart gloss or semi-gloss to the packaging bag, and the cosmeticity of the tin-deposited layer improves the aesthetic appearance of the packaging bag. In addition, the concealment of the tin-film vapor deposition layer makes it impossible to see from the outer surface to the inner surface of the packaging bag, so that the object to be heated can be made invisible from the outside of the packaging bag.

The printing film is a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property, and a packaging bag in which a predetermined drawing is printed on the lower surface of the transparent vapor-deposited film has a gas barrier property and a water vapor barrier property as a printing film. By using the transparent vapor-deposited film, oxygen is not permeated and oxidation of the object to be heated contained in the packaging bag can be prevented. It can prevent the moisture of things.

A packaging bag in which the thickness dimension of the first synthetic resin film is in the range of 45 to 55 μm and the thickness dimension of the tin vapor-deposited film and the printing film is in the range of 10 to 14 μm is the thickness dimension of the first synthetic resin film. Is in the above range, the composite film has a predetermined strength, the packaging bag becomes stiff, and the packaging bag can be prevented from twisting, settling, or falling over. Since the thickness dimension of the tin-deposited film of the packaging bag is within the above range, the tin-deposited film can impart gloss or semi-gloss to the packaging bag, and the cosmeticity of the tin-deposited film improves the aesthetic appearance of the packaging bag. In addition, the hiding property of the tin-deposited film makes it impossible to see from the outer surface to the inner surface of the packaging bag, so that the object to be heated from the outside of the packaging bag cannot be visually recognized from the outside. Since the thickness dimension of the printing film is in the above range, the packaging bag does not allow oxygen to permeate, can reliably prevent the oxidation of the object to be heated contained in the packaging bag, and allows water vapor to permeate. It is possible to reliably prevent the moisture of the object to be heated contained in the packaging bag.

A packaging bag in which the thickness dimensions of the first and second adhesive layers and the UV blocking agent layer are in the range of 2 to 4 μm is a film because the thickness dimensions of the first and second adhesive layers are in the above range. The films can be firmly bonded to each other and the films can be prevented from being inadvertently peeled off. Since the thickness dimension of the UV blocking agent layer of the packaging bag is within the above range, it is possible to reliably block ultraviolet rays, and it is possible to prevent deterioration of the object to be heated, change in physical properties, and change in taste contained in the packaging bag. can.

The perspective view of the packaging bag shown as an example. A perspective view of a composite film that makes a packaging bag. The exploded perspective view which shows as an example of a packaging bag. An exploded perspective view of a composite film shown as an example. FIG. 1 is a cross-sectional view taken along the line AA and a partially enlarged view. The figure explaining the transmission of microwaves in a tin-deposited film. The figure which shows an example of the case of reading various data from the IC tag of a packaging bag by an IC tag reader. The exploded perspective view which shows as another example of a packaging bag. An exploded perspective view of a composite film shown as another example. A cross-sectional view and a partially enlarged view similar to those in FIG. The figure explaining the reflection of the microwave in the aluminum vapor-deposited film layer.

The details of the packaging bag according to the present invention will be described below with reference to the attached drawings such as FIG. 1 which is a perspective view of the packaging bag 10A shown as an example. FIG. 2 is a perspective view of the composite film 20A for forming the packaging bag 10A, and FIG. 3 is an exploded perspective view showing an example of the packaging bag 10A. FIG. 4 is an exploded perspective view of the composite film 20A shown as an example, and FIG. 5 is a cross-sectional view taken along the line AA and a partially enlarged view of FIG. FIG. 6 is a diagram for explaining the transmission of microwaves in the tin-deposited film 23, and FIG. 7 is a diagram showing an example of reading various data from the IC tag 18 of the packaging bag 10A by the IC tag reader 55. In FIGS. 1, 3 and 7, the drawings printed on the packaging bag 10A (printing film 24) are omitted. FIG. 2 shows a state in which the composite film 20A is wound around the feeding roll 21. FIG. 4 partially shows the composite film 20A. In FIGS. 1 and 3, the vertical direction is indicated by an arrow X, the horizontal direction is indicated by an arrow Y, and the thickness direction is indicated by an arrow Z.

The packaging bag 10A includes an upper end edge portion 11 (peripheral portion) and a lower end edge portion 12 (peripheral portion) extending in the horizontal direction, both side edge portions 13, 14 (peripheral portion) extending in the vertical direction, and an upper and lower end edge portions 11, It has a storage space 15 surrounded by 12 and both side edges 13 and 14. In the packaging bag 10A, the upper and lower edge portions 11 and 12 and the both side edge portions 13 and 14 serve as the seal portion 16, and the storage space 15 is located inside the seal 16 portion (defined). Although not shown, the storage space 15 of the packaging bag 10A accommodates objects to be heated (retort foods, frozen foods, refrigerated foods, face masks, and other foods and products that require heating). Notches 17 (cuts) are formed in the side edges 13 and 14 of the packaging bag 10A. An IC tag 18 (RFID tag) provided with an IC chip is attached to the upper end edge 11 of the packaging bag 10A. The IC tag 18 attached to the packaging bag 10A is used because it does not burn in a microwave oven. In FIG. 1, the IC tag 18 (RFID tag) is attached to the upper end edge 11 of the packaging bag 10A, but the IC tag 18 may not be attached to the packaging bag 10A.

The IC chip of the IC tag 18 has a specific number (identifier) of the packaging bag 10A, a product name of the product (heated object) housed in the storage space 15 of the packaging bag 10A, the selling price of the product, and the date of manufacture of the product. Various data such as the date, the expiration date of the product, the constituent components of the product, the manufacturer and the seller of the product, etc. are stored (stored). Each of these data is written to the IC chip of the IC tag 18 by the IC tag writer. The data stored in the IC chip of the IC tag 18 is read by an IC tag reader connected to a cash register (POS cash register).

As shown in FIG. 2, the packaging bag 10A is a vertically long four-sided seal bag manufactured by a bag making machine 19 and made of overlapping composite films 20A. In the bag making machine 10, the composite film 20A unwound from the feeding roll 21 is half-folded, three sides (three sides) are sealed (fused) by a heat seal or a sonic seal, and then the storage space 15 is filled with an object to be heated. Then, seal (fuse) the other one (one side). The shape of the packaging bag 10A (including the packaging bag 10B) is not limited to that shown in the drawing, and any shape having a storage space 15 can be adopted as the shape of the packaging bag 10A (including the packaging bag 10B).

As shown in FIGS. 3 and 4, the composite film 20A includes a first synthetic resin film 22, a tin vapor deposition film 23 (tin discontinuous vapor deposition film), a printing film 24, a first adhesive layer 25, and a second adhesive layer 26. Is formed from. In the composite film 20A, the first synthetic resin film 22 → the first adhesive layer 25 → the tin-deposited film 23 → the second adhesive from the inner surface 27 (one surface) to the outer surface 28 (the other surface) of the packaging bag 10A. They are arranged in the order of layer 26 → printing film 24 in the thickness direction. As the first synthetic resin film 22, a stretched film made by stretching a raw fabric (non-stretched film) of a thermoplastic synthetic resin is used. Various PEs and various PPs are used in the thermoplastic synthetic resin for forming the first synthetic resin film 22.

The first synthetic resin film 22 has an inner surface 29 and an outer surface 30, and the inner surface 29 constitutes the inner surface 27 of the packaging bag 10A. The first synthetic resin film 22 has an upper end edge portion 31 (peripheral portion) and a lower end edge portion 32 (peripheral portion) extending in the horizontal direction, both side edge portions 33 and 34 (peripheral portion) extending in the vertical direction, and upper and lower end edges. It has an intermediate area 35 surrounded by portions 31 and 32 and both side edges 33 and 34 to form a storage space 15. In the packaging bag 10A, the composite films 20A overlap each other with the inner surfaces 29 of the first synthetic resin film 22 facing each other, and in the sealing portion 16 (upper and lower end edges 11, 12 and both side edges 13, 14 of the packaging bag 10A). The first synthetic resin films 22 are fused (heat welded) to each other.

The thickness dimension L1 of the first synthetic resin film 22 is in the range of 45 to 55 μm, and the thickness dimension L1 is preferably 50 μm. When the thickness dimension L1 of the first synthetic resin film 22 is less than 45 μm, the strength of the first synthetic resin film 22 is lowered, and as a result, the stiffness (independence) of the packaging bag 10A is weakened, and the packaging bag 10A is twisted or settled. , The packaging bag 10A may fall down, and the workability during use of the packaging bag 10A may be reduced. When the thickness dimension L1 of the first synthetic resin film 22 exceeds 55 μm, the strength (rigidity) of the first synthetic resin film 22 becomes higher than necessary, the packaging bag 10A becomes tense, and workability during use deteriorates. In some cases. Since the thickness dimension L1 of the first synthetic resin film 22 is within the above range, the composite film 20A has a predetermined strength, the stiffness of the packaging bag 10A is optimal, and the packaging bag 10A is twisted, settled, or collapsed. , Tension can be prevented, and workability at the time of using the packaging bag 10A can be improved.

The tin-deposited film 23 has an inner surface 36 and an outer surface 37, and has an upper end edge portion 38 (peripheral portion) and a lower end edge portion 39 (peripheral portion) extending in the lateral direction, and both side edge portions 40, 41 (peripheral portion) extending in the vertical direction. A portion) and an intermediate area 42 surrounded by upper and lower edge portions 38 and 39 and both side edge portions 40 and 41 to form a storage space 15. In the tin-deposited film 23, the upper and lower edge portions 38 and 39 face the upper and lower end edges 31 and 32 of the first synthetic resin film 22, and the both side edge portions 40 and 41 are both side edge portions 33 of the first synthetic resin film 22. , 34, and the intermediate area 42 faces the intermediate area 35 of the first synthetic resin film 22.

The tin-deposited film 23 is formed of a second synthetic resin film 43 and a tin-deposited layer 44. The tin-deposited layer 44 is formed on the inner surface 45 of the second synthetic resin film 43 and is located directly below the second synthetic resin film 43. The tin vapor deposition layer 44 may be formed on the outer surface of the second synthetic resin film 43 and may be located directly above the second synthetic resin film 43. The tin vapor-deposited film 23 overlaps the outer surface 30 of the first synthetic resin film 22 with its inner surface 36 (inner surface 45 of the second synthetic resin film 43) facing the outer surface 30 of the first synthetic resin film 22, and is first bonded. It is bonded (fixed) to the outer surface 30 of the first synthetic resin film 22 via the agent layer 25.

As the second synthetic resin film 43, a stretched film made by stretching a raw fabric (non-stretched film) of a transparent thermoplastic synthetic resin is used. As the second synthetic resin film 43, a transparent vapor-deposited film described later can also be used. The tin-deposited layer 44 is colorless silver or colored silver. On the inner surface 45 of the second synthetic resin film 43 on which the tin-deposited layer 44 is formed (the surface on which the tin-deposited surface of the second synthetic resin film 43 is vapor-deposited), the site 46 where the tin-deposited layer 44 is present (the tin-deposited layer 44 is formed). The formed portion) and the non-existent portion 47 (the non-formed portion where the tin-deposited layer 44 is not formed) in which the tin-deposited layer 44 does not exist are formed. The tin-deposited film 23 has gloss or semi-gloss due to the colorless silver-colored or colored silver-colored tin-deposited layer 44, and has cosmetic properties that improve the aesthetic appearance, and the outer surface 28 to the inner surface of the packaging bag 10A (composite film 20A). It has a concealing property that makes it impossible to see the 27.

At the site 46 where the tin-deposited layer 44 of the second synthetic resin film 43 exists, the inner surface 45 (surface) of the second synthetic resin film 43 is covered with the tin-deposited layer 44, and the second synthetic resin film 43 is colorless silver or silver. It is covered by a tin-deposited layer 44 of colored silver. In the non-existing portion 47 of the second synthetic resin film 43 in which the tin-deposited layer 44 does not exist, the inner surface 45 (surface) of the second synthetic resin film 43 is exposed from between the existing portions 46 (between the tin-deposited layers 44). The inner surface 45 of the second synthetic resin film 43 and the outer surface 30 of the first synthetic resin film 23 are directly opposed to each other. When the tin-deposited layer 44 is formed on the outer surface (surface) of the second synthetic resin film 43, in the non-existing portion 47, the outer surface (surface) of the second synthetic resin film 43 is between the present portions 46 (tin-deposited layer 44). The outer surface of the second synthetic resin film 43 and the inner surface 48 of the printing film 23 are directly opposed to each other.

In the tin-deposited film 23, as shown by the arrow Z1 in FIG. 6, the microwaves applied to the tin-deposited film 23 are reflected at the presence portion 46 of the tin-deposited layer 44, and the tin-deposited film 23 (second synthetic resin film 43). ) Cannot be transmitted. However, in the non-existing portion 47 of the tin-deposited layer 44, the tin-deposited layer 44 does not exist, the microwave is not reflected by the tin-deposited layer 44, and the microwave is transmitted to the tin-deposited film 23 (second synthetic resin film). 44) is transmitted. Therefore, in the packaging bag 10A, the tin-deposited film 23 is capable of transmitting microwaves, and the object to be heated housed in the storage space 15 can be heated by irradiation with microwaves. Further, the tin-deposited film 23 having the non-existing portion 47 does not diffuse radio waves (jamming) and does not block the radio waves, so that the IC tag 18 and the IC tag reader 55 can communicate with each other.

The tin-deposited film 23 has a thickness dimension L2 in the range of 10 to 14 μm, preferably a thickness dimension L2 of 12 μm. If the thickness dimension L2 of the tin vapor deposition film 23 is less than 10 μm, the thickness dimension of the tin vapor deposition layer 44 becomes small, and the tin vapor deposition film 23 cannot impart gloss or semi-gloss to the packaging bag 10A. The cosmeticity of the packaging bag 10A is deteriorated, the aesthetic appearance of the packaging bag 10A cannot be improved, and the hiding property of the tin-deposited film 23 is deteriorated, so that the outer surface 28 to the inner surface 27 of the packaging bag 10A can be visually recognized. It cannot be disabled. When the thickness dimension L2 of the tin vapor deposition film 23 exceeds 14 μm, the thickness dimension of the tin vapor deposition layer 44 becomes larger than necessary, the microwaves are reflected by the tin vapor deposition layer 44, and the microwaves are transmitted to the tin vapor deposition film 23 (packaging). The tin vapor deposition film 23 (tin vapor deposition layer 44) diffusely reflects the radio waves, and the tin vapor deposition film 23 interferes with the radiation of the radio waves. The radio wave is not emitted, and the IC tag reader 55 may not be able to smoothly read various data stored in the IC tag 18. Further, the tin-deposited film 23 (tin-film-deposited layer 44) may block radio waves, making communication between the IC tag 18 and the IC tag reader 55 impossible.

Since the thickness dimension of the tin-deposited film 23 is within the above range, the tin-deposited film 23 can impart gloss or semi-gloss to the packaging bag 10A, and the cosmeticity of the tin-deposited film 23 improves the aesthetic appearance of the packaging bag 10A. In addition, the concealment of the tin-deposited film 23 makes it impossible to see the outer surface 28 to the inner surface 27 of the packaging bag 10A, so that the object to be heated from the outside of the packaging bag cannot be visually recognized. can. Further, the tin vapor deposition layer 44 does not reflect the microwaves, the microwaves can pass through the tin vapor deposition film 23 (packaging bag 10A), and the tin vapor deposition film 23 does not diffusely reflect radio waves. Since the tin vapor deposition film 23 does not interfere with the radiation of radio waves, the IC tag 18 radiates radio waves according to the radiation characteristics, and the tin vapor deposition film 23 having the 47th position of the non-existent portion does not block the radio waves. Communication between the IC tag 18 and the IC tag reader 55 becomes possible, and various data stored in the IC tag 18 can be smoothly read by the IC tag reader 55.

The ratio of the presence portion 46 of the tin-deposited layer 44 to the unit area (1 cm × 1 cm: 1 cm ^{2) of the second synthetic resin film 43 is in the range of 75 to 97%.} The ratio of the non-existent portion 47 of the tin-deposited layer 44 to the unit area (1 cm × 1 cm: 1 cm ^{2) of the second synthetic resin film 43 is in the range of 3 to 25%.} When the proportion of the presence portion 46 of the tin-deposited layer 44 is less than 75% and the proportion of the non-existing portion 47 of the tin-deposited layer 44 exceeds 25%, the presence portion 46 becomes less than necessary, and the tin-deposited film 23 causes the presence portion 46 to be less than necessary. It is not possible to impart gloss or semi-gloss to the packaging bag 10A, the cosmeticity of the tin-film vapor deposition film 23 is deteriorated, the aesthetic appearance of the packaging bag 10A cannot be improved, and the hiding property of the tin-film vapor deposition film 23 is deteriorated. , It is not possible to make the outer surface 28 to the inner surface 27 of the packaging bag 10A invisible. When the proportion of the presence portion 46 of the tin-deposited layer 44 exceeds 97% and the proportion of the non-existence portion 47 of the tin-deposited layer 44 is less than 3%, the presence portion 46 becomes larger than necessary, and the second synthetic resin film 43 The tin-film vapor deposition layer 44 occupies most of the unit area of the above, and the microwave vapor deposition film 23 (tin-film deposition layer 44) reflects the microwaves, so that the microwave waves cannot pass through the tin-film vapor deposition film 23 (packaging bag 10A). At the same time, the tin vapor deposition film 23 (tin vapor deposition layer 44) may block radio waves, making communication between the IC tag 18 and the IC tag reader 55 impossible.

The ratio of the presence portion 46 of the tin vapor deposition layer 44 to the unit area of the second synthetic resin film 43 is in the above range, and the ratio of the non-existence portion 47 of the tin vapor deposition layer 44 to the unit area of the second synthetic resin film 43 is in the above range. Therefore, the tin-deposited film 23 can impart gloss or semi-gloss to the packaging bag 10A, and the cosmeticity of the tin-deposited film 23 can improve the aesthetic appearance of the packaging bag 10A. By making it impossible to visually recognize the outer surface 28 to the inner surface 28 of the packaging bag 10A due to the concealing property, it is possible to make it impossible to visually recognize the object to be heated from the outside of the packaging bag 10A. Further, the tin vapor deposition layer 44 does not reflect the microwaves, the microwaves can pass through the tin vapor deposition film 23 (packaging bag 10A), and the tin vapor deposition film 23 does not diffusely reflect radio waves. Since the tin vapor deposition film 23 does not interfere with the radiation of radio waves, the IC tag 18 radiates radio waves according to the radiation characteristics, and the tin vapor deposition film 23 having the non-existent portion 47 does not block the radio waves, and the IC. Communication between the tag 18 and the IC tag reader 55 becomes possible, and various data stored in the IC tag 18 can be smoothly read by the IC tag reader 55.

The printing film 24 has an inner surface 48 and an outer surface 49, and the outer surface 49 constitutes the outer surface 28 of the packaging bag 10A. The printing film 24 has an upper end edge portion 50 (peripheral portion) and a lower end edge portion 51 (peripheral portion) extending in the horizontal direction, both side edge portions 52, 53 (peripheral portion) extending in the vertical direction, and an upper and lower end edge portions 50, It has an intermediate area 54 surrounded by 51 and both side edges 52 and 53 to form a storage space 15. The printing film 24 is a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property. The transparent thin-film deposition film is a functional film in which a transparent inorganic thin film is formed on the upper surface of the base film by a vapor deposition process, and the inorganic vapor deposition barrier layer (alumina, oxidation) is formed on the upper surface of the base film (PET or PP). Silicon, etc.) and the coating barrier layer are laminated.

The printing film 24 has a printing surface 48 (printing layer 48) on which a predetermined drawing is printed. The predetermined drawing (printing layer 48) is printed on the lower surface of the transparent vapor deposition film (printing film 24). The drawings include images and product logos of products (heated objects) housed in the storage space 15 of the packaging bag 10A, product names, product descriptions, product advertisements, product selling prices, product manufacturers and distributors, etc. There are the date of manufacture of the product, the expiration date of the product, the constituents of the product, and so on. The inner surface 48 (printing layer 48) of the printing film 24 is overlapped with the outer surface 37 of the tin-film-deposited film 23 in a state of facing the outer surface 37 (tin-film-deposited layer 44) of the tin-film-deposited film 23, and is interposed via the second adhesive layer 26. It is bonded (fixed) to the outer surface 37 of the tin vapor deposition film 23. In the printing film 24, the upper and lower edge portions 50 and 51 face the upper and lower end edges 31, 32, 38 and 39 of the first synthetic resin film 22 and the tin vapor deposition film 23, and the both side edge portions 52 and 53 are the first synthetic films 24. The intermediate areas 54 face the intermediate areas 35 and 42 of the first synthetic resin film 22 and the tin vapor-deposited film 23, while facing the side edges 33, 34, 40, 41 of the resin film 22 and the tin vapor-deposited film 23. ..

The thickness dimension L3 of the printing film 24 (transparent vapor-deposited film) is in the range of 10 to 14 μm, and the thickness dimension L3 is preferably 12 μm. If the thickness dimension L3 of the printing film (transparent vapor-deposited film) is less than 10 μm, oxygen may permeate through the printing film 24 (composite film 20A) and the heated object stored in the storage space 15 of the packaging bag 10A may be oxidized. At the same time, water vapor may permeate through the printing film 24 (composite film 20A), and the object to be heated housed in the storage space 15 of the packaging bag 10A may become damp. Since the thickness dimension L3 of the printing film 24 is within the above range, oxygen does not permeate, oxidation of the object to be heated can be reliably prevented, and moisture of the object to be heated can be reliably prevented without permeating water vapor. Can be prevented.

The first adhesive layer 25 is applied to either the outer surface 30 of the first synthetic resin film 22 or the inner surface 36 of the tin-deposited film 23, and the first synthetic resin film 22 and the tin-deposited film 23 are bonded (fixed). doing. In FIG. 3, the first adhesive layer 25 is applied to the entire outer surface 30 of the first synthetic resin film 22 or the inner surface 36 of the tin-deposited film 23, but the first adhesive layer 25 is the first synthetic resin film 22. It may be intermittently (partially) applied to the outer surface 30 of the above or the inner surface 36 of the tin vapor deposition film 23. The first adhesive layer 25 is transparent and has a thickness dimension L4 in the range of 2 to 4 μm, preferably a thickness dimension L4 of 3 μm.

If the thickness dimension L4 of the first adhesive layer 25 is less than 2 μm, the first synthetic resin film 22 and the tin-deposited film 23 cannot be firmly bonded, and the adhesive strength between the films 22 and 23 is insufficient. , The films 22 and 23 may be peeled off. When the thickness dimension L4 of the first adhesive layer 25 exceeds 4 μm, the rigidity of the first adhesive layer 25 increases the rigidity of the packaging bag 10A (composite film 20A), and the packaging bag 10A (composite film 20A) is flexible. In addition to the loss of properties, the packaging bag 10A may become tense and workability during use may decrease. Since the thickness dimension L4 of the first adhesive layer 25 is within the above range, the films 22 and 3 can be firmly joined, the films 22 and 23 can be prevented from being inadvertently peeled off, and the packaging bag can be prevented. The 10A (composite film 20A) can maintain an appropriate strength (rigidity) and an appropriate flexibility, and can improve workability when the packaging bag 10A is used.

The second adhesive layer 26 is applied to either the outer surface 37 of the tin-deposited film 23 or the inner surface 48 of the printing film 24, and the tin-deposited film 23 and the printing film 24 are bonded (fixed) to each other. In FIG. 3, the second adhesive layer 26 is applied to the entire outer surface 37 of the tin-film-deposited film 23 or the inner surface 48 of the printing film 24, but the second adhesive layer 26 is applied to the outer surface 37 of the tin-film-deposited film 23 or printing. It may be applied intermittently (partially) to the inner surface 48 of the film 24. The second adhesive layer 26 is transparent and has a thickness dimension L5 in the range of 2 to 4 μm, preferably a thickness dimension L5 of 3 μm.

If the thickness dimension L5 of the second adhesive layer 26 is less than 2 μm, the tin-deposited film 23 and the printing film 24 cannot be firmly bonded, and the adhesive strength between the films 23 and 24 is insufficient, and these films 23 and 24 may peel off. When the thickness dimension L5 of the second adhesive layer 26 exceeds 4 μm, the rigidity of the second adhesive layer 26 increases the rigidity of the packaging bag 10A (composite film 20A), and the packaging bag 10A (composite film 20A) is flexible. In addition to the loss of properties, the packaging bag 10A may become tense and workability during use may decrease. Since the thickness dimension L5 of the second adhesive layer 26 is within the above range, the films 23 and 24 can be firmly bonded to each other, the films 23 and 24 can be prevented from being inadvertently peeled off, and the packaging can be prevented. The bag 10A (composite film 20A) can maintain appropriate strength (rigidity) and flexibility, and workability during use of the packaging bag 10A can be improved.

When a plurality of packaging bags 10A are lined up at the store and the packaging bags 10A are purchased, the purchaser brings the packaging bags 10A to the payment counter. At the payment counter, various data (identification of the packaging bag 10A, product (heated object) stored in the storage space of the packaging bag 10A) written (stored) on the IC tag 18 attached to the packaging bag 10A. The name, the selling price of the product, the date of manufacture of the product, the expiration date of the product, the constituent components of the product, the manufacturer and the seller of the product, etc.) are read by the IC tag reader 55. Various data read by the IC tag reader 55 are transmitted from the IC tag reader 55 to the cash register (POS cash register). The cash register (POS cash register) manages (aggregates) the inventory, inventory, sales, etc. of the packaging bag 10A from various transmitted data.

The packaging bag 10A made of the composite film 20A shown in FIG. 4 has a first synthetic resin film 22 made of a thermoplastic synthetic resin and a tin vapor deposition layer 44, and has an outer surface 30 of the first synthetic resin film 22. A composite film 20A formed from a tin-deposited film 23 bonded to the tin vapor-deposited film 23 and a printing film 24 having a printing surface 48 (printing layer 48) on which a predetermined drawing is printed and bonded to the outer surface 38 of the tin-deposited film 23. The packaging bag 10A is glossy or semi-glossy due to the tin vapor-deposited film 23 having a tin-deposited layer 44 of colorless silver or colored silver, and the cosmeticity of the tin-deposited film 23 enhances the aesthetic appearance of the packaging bag 10A. Can be done. In the packaging bag 10A, the existing portion 46 in which the tin-deposited layer 44 is present is formed on the inner surface 45 (the surface on which tin is vapor-deposited) of the second synthetic resin film 43, and the inner surface 45 of the second synthetic resin film 43 is formed in the existing portion 46. Since it is covered with the tin vapor deposition layer 44, the hiding property of the tin vapor deposition film 23 having the tin vapor deposition layer 44 makes it impossible to visually recognize the outer surface 28 to the inner surface 27 of the packaging bag 10A from the outside of the packaging bag 10A. It is possible to make the heating object invisible.

In the packaging bag 10A made from the composite film 20A of FIG. 4, the non-existent portion 47 in which the tin vapor-deposited layer 44 does not exist is formed on the inner surface 45 (the surface on which tin is vapor-deposited) of the second synthetic resin film 43, and the non-existent portion 47 is formed. In 47, the inner surface 45 (surface) of the second synthetic resin film 43 is exposed, and the second synthetic resin film 43 and the first synthetic resin film 22 are directly opposed to each other. The reflection of the microwave by the 23 can be prevented, and the microwave radiated from the microwave can be transmitted in the non-existent portion 47 in the second synthetic resin film 43 in which the tin vapor deposition layer 44 does not exist. In the packaging bag 10A, when the object to be heated housed in the storage space 15 of the packaging bag 10A made of the composite film 20A is heated in the microwave oven, the microwave emitted from the microwave oven is the tin vapor deposition film 23 (printing film). 24. Since the first adhesive layer 25) can be permeated, the object to be heated can be sufficiently and surely heated in the microwave oven.

In the packaging bag 10A made from the composite film 20A of FIG. 4, even if the IC tag 18 is attached to the packaging bag 10A, the tin-deposited film 23 having the non-existent portion 47 does not diffuse radio waves (radio wave interference), and the IC tag The malfunction of 18 can be prevented, various data stored in the IC tag 18 can be smoothly read by the IC tag reader 55, and the tin-deposited film 23 having the non-existent portion 47 does not block radio waves. Communication between the IC tag 18 and the IC tag reader 55 becomes possible, and the IC tag 18 can be used to collectively manage inventory, inventory, sales, and the like.

Since the packaging bag 10A made from the composite film 20A of FIG. 4 uses a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property as the printing film 24, the packaging bag 10A does not allow oxygen to permeate. It is possible to prevent oxidation, drying, and mold generation of the object to be heated stored in the storage space 15 of the packaging bag 10A, and the packaging bag 10A is stored in the storage space 15 of the packaging bag 10A without allowing water vapor to permeate. It is possible to prevent the moisture of the object to be heated. In the packaging bag 10A, since the predetermined drawing is printed on the lower surface (printing surface 48) of the transparent vapor deposition film, the predetermined drawing can be visually recognized from the outside of the packaging bag 10A, and the storage space 15 of the packaging bag 10A can be used. Image and product logo of the contained product (heated object), product name, product description, product advertisement, product selling price, product manufacturer and distributor, product manufacturing date, product expiration date, You can check the components of the product.

FIG. 8 is an exploded perspective view showing another example of the packaging bag 10B, and FIG. 9 is an exploded perspective view of the composite film 20B shown as another example. FIG. 10 is a cross-sectional view taken along the arrow and a partially enlarged view similar to FIG. In FIG. 8, the drawing printed on the packaging bag 10B is omitted. .. In FIG. 9, the composite film 20B is partially shown. In FIG. 8, the vertical direction is indicated by an arrow X, the horizontal direction is indicated by an arrow Y, and the thickness direction is indicated by an arrow Z.

Similar to that in FIG. 1, the packaging bag 10B has an upper end edge portion 11 (peripheral portion) and a lower end edge portion 12 (peripheral portion) extending in the lateral direction, and both side edge portions 13 and 14 (peripheral portion) extending in the vertical direction. , It has a storage space 15 surrounded by upper and lower edge portions 11 and 12 and both side edge portions 13 and 14. The upper and lower edge portions 11 and 12 and the side edge portions 13 and 14 serve as the seal portion 16, and the accommodation space 15 is located (defined) inside the seal portion 16. An IC tag 18 (RFID tag) provided with an IC chip is attached to the upper end edge 11 of the packaging bag 10B. The IC tag 18 attached to the packaging bag 10B is used because it does not burn in a microwave oven. The IC tag 18 may not be attached to the packaging bag 10B.

As shown in FIGS. 26. It is formed from a UV blocking agent layer 56. In the composite film 20A, the first synthetic resin film 22 → the first adhesive layer 25 → the tin-deposited film 23 → the second adhesive from the inner surface 27 (one surface) to the outer surface 28 (the other surface) of the packaging bag 10B. The layers 26, the UV blocking agent layer 56, and the printing film 24 are arranged in the order of thickness.

The first synthetic resin film 22 is the same as that of FIGS. It has both side edge portions 33, 34 (peripheral portion) extending in the direction, and an intermediate area 35 surrounded by upper and lower end edge portions 31, 32 and both side edge portions 33, 34 to form a storage space 15. In the packaging bag 10B, the composite films 20B overlap each other with the inner surfaces 29 of the first synthetic resin film 22 facing each other, and the first synthetic resin films 22 are fused (heat welded) at the sealing portion 16. The thickness dimension L1 of the first synthetic resin film 22 is the same as that of the first synthetic resin film 22 shown in FIG.

The tin-deposited film 23 is the same as that of FIGS. , 41 (peripheral portion), and an intermediate area 42 surrounded by upper and lower end edges 38 and 39 and both side edges 40 and 41 to form a storage space 15. The tin vapor-deposited film 23 is formed of a second synthetic resin film 43 made of a transparent thermoplastic synthetic resin and a colorless silver-colored or colored silver-colored tin vapor-deposited layer 44, and is formed through a first adhesive layer 25. It is bonded (fixed) to the outer surface 30 of the synthetic resin film 22. The tin-deposited layer 44 is formed on the inner surface 45 (plane) of the second synthetic resin film 43. The tin vapor deposition layer 44 may be formed on the outer surface (surface) of the second synthetic resin film 43. The tin-deposited film 23 has gloss or semi-gloss due to the colorless silver-colored or colored silver-colored tin-deposited layer 44, and has cosmetic properties that improve the aesthetic appearance, and the outer surface 28 to the inner surface of the packaging bag 10B (composite film 20B). It has a concealing property that makes it impossible to see the 27.

On the inner surface 45 of the second synthetic resin film 43 on which the tin-deposited layer 44 is formed (the surface on which the tin-deposited surface of the second synthetic resin film 43 is vapor-deposited), the existing portion 46 where the tin-deposited layer 44 is present and the tin-deposited layer 44 are present. A non-existent portion 47 in which is not present is formed. In the non-existing portion 47 of the tin-deposited layer 44, the microwave is not reflected by the tin-deposited layer 44, and the microwave can pass through the tin-deposited film 23 (second synthetic resin film 43) (FIG. 6). reference). The thickness dimension L2 of the tin-deposited film 23 is the same as that of the tin-deposited film 23 shown in FIG. The ratio of the presence portion 46 of the tin-deposited layer 44 to the unit area of the second synthetic resin film 43 and the ratio of the non-existence portion 47 of the tin-deposited layer 44 to the unit area of the second synthetic resin film 43 are shown in FIG. It is the same as those of the synthetic resin film 23.

The printing film 24 is the same as that of FIGS. It has both side edge portions 52, 53 (peripheral portion) and an intermediate area 54 surrounded by upper and lower end edge portions 50, 51 and both side edge portions 52, 53 to form a storage space 15. The printing film 24 is a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property, and has a printing surface 48 on which a predetermined drawing is printed. The printing film 24 is bonded (fixed) to the outer surface 37 of the tin-deposited film 23 via the second adhesive layer 26. The thickness dimension L3 of the printing film 24 is the same as that of the printing film 24 shown in FIG.

The transparent first adhesive layer 25 is applied to either the outer surface 30 of the first synthetic resin film 22 or the inner surface 36 of the tin-deposited film 23, and joins the first synthetic resin film 22 and the tin-deposited film 23 ( It is stuck). The thickness dimension L4 of the first adhesive layer 25 is the same as that of the first adhesive layer 25 shown in FIG. The transparent second adhesive layer 26 is applied to either the outer surface 37 of the tin-deposited film 23 or the inner surface 48 of the printing film 24, and the tin-deposited film 23 and the printing film 24 are bonded (fixed) to each other. The thickness dimension L5 of the second adhesive layer 26 is the same as that of the second adhesive layer shown in FIG.

The UV blocking agent layer 56 (ultraviolet absorbing film coating agent) is transparent and uses an ultraviolet absorbing group, and barriers ultraviolet rays by cutting substantially 100% of wavelengths of about 370 nm or less. As the UV blocking agent layer 56, a translucent or opaque one can also be used. The UV blocking agent layer 56 is applied to either the entire inner surface 48 of the printing film 24 (transparent vapor-deposited film) or the entire area of the second adhesive layer 26.

The UV blocking agent layer 56 may be applied to either the second adhesive layer 26 or the outer surface 37 of the tin vapor deposition film 23, or the UV blocking agent layer 56 may be applied to the inner surface of the tin vapor deposition film 23. It may be applied to any one of 36 and the first adhesive layer 25. When the UV blocking agent layer 56 is applied to either the second adhesive layer 26 or the outer surface 37 of the tin vapor deposition film 23, the UV blocking agent layer 56 is located directly above the tin vapor deposition film 23. When the UV blocking agent layer 56 is applied to either the inner surface 36 of the tin vapor deposition film 23 or the first adhesive layer 25, the UV blocking agent layer 56 is located directly below the tin vapor deposition film 23.

The UV blocking agent layer 56 has a thickness dimension L6 in the range of 2 to 4 μm, preferably a thickness dimension L6 of 3 μm. If the thickness dimension L6 of the UV blocking agent layer 56 is less than 2 μm, the thickness dimension L6 of the UV blocking agent layer 56 is small, and it may not be possible to reliably block ultraviolet rays. Since the thickness dimension L6 of the UV blocking agent layer 56 is within the above range, the packaging bag 10 can reliably block ultraviolet rays.

The packaging bag 10B made of the composite film 20B shown in FIGS. 8 and 9 has the following effects in addition to the effect of the packaging bag 10A made of the composite film 20A shown in FIG. The packaging bag 10B is either the inner surface 48 of the printing film 24 and the second adhesive layer 26, or the second adhesive layer 26 and the outer surface 37 of the tin vapor-deposited film 23, or The packaging bag 10B has a barrier function against ultraviolet rays by the UV blocking agent layer 56 applied to either the inner surface 36 of the tin vapor-deposited film 23 or the first adhesive layer 25, and can block ultraviolet rays. It is possible to prevent deterioration of the object to be heated, change in physical properties, and change in taste contained in the packaging bag 10B made of the composite film 20B.

In the packaging bag 10B, the UV blocking agent layer 56 does not reflect radio waves together with the tin vapor deposition film 23, and the object to be heated housed in the storage space 15 of the packaging bag 10B can be sufficiently heated by a microwave oven. At the same time, even if the IC tag 18 is attached to the packaging bag 10B, the UV blocking agent layer 56 can prevent the IC tag 18 from malfunctioning together with the tin vapor deposition film 23 having the non-existing portion 47 without diffusely radiating radio waves. The IC tag reader 55 can smoothly read various data stored in the IC tag 18, and the UV blocking agent layer 56 does not block radio waves together with the tin vapor deposition film 23 having the non-existing portion 47, and the IC tag. Communication between the 18 and the IC tag reader 55 becomes possible, and the IC tag 18 can be used to collectively manage inventory, inventory, sales, and the like.

10A Packaging bag 10B Packaging bag 11 Upper end edge 12 Lower edge edge 13 Side edge 14 Side edge 15 Storage space 16 Seal 17 Notch 18 IC tag 19 Bag making machine 20A Composite film 20B Composite film 21 Feeding roll 22 First synthesis Resin film 23 Tin vapor deposition film 24 Printing film 25 1st adhesive layer 26 2nd adhesive layer 27 Inner surface 28 Outer surface 29 Inner surface 30 Outer surface 31 Upper end edge 32 Lower edge 33 Side edge 34 Side edge 35 Intermediate 36 Inner surface 37 Outer surface 38 Upper end edge 39 Lower edge 40 Side edge 41 Side edge 42 Intermediate 43 Second synthetic resin film 44 Tin vapor deposition layer 45 Inner surface (face)
46 Existence part 47 Non-existence part 48 Inner surface 49 Outer surface 50 Upper end edge 51 Lower edge 52 Side edge 53 Side edge 54 Intermediate 55 IC tag reader 56 UV cut agent layer L1 to L6 Thickness dimension

Claims (13)

In a packaging bag that houses a predetermined object to be heated
The packaging bag has a first synthetic resin film made of a thermoplastic synthetic resin and constituting the inner surface of the packaging bag, and a tin vapor-deposited film having a tin vapor-deposited layer and bonded to the outer surface of the first synthetic resin film. And that it is made of a composite film formed from a printing film that constitutes the outer surface of the packaging bag, has a printing surface on which a predetermined drawing is printed, and is bonded to the outer surface of the tin vapor deposition film. A characteristic packaging bag. The packaging bag is made of the composite film in which the first synthetic resin films are overlapped with each other facing each other, and a sealing portion in which the first synthetic resin films are fused to each other located at the peripheral edge of the packaging bag. The packaging bag according to claim 1, which is located inside the seal portion and has a storage space for accommodating the object to be heated. The packaging according to claim 1 or 2, wherein in the packaging bag, the tin-deposited film is permeable to microwaves, and the object to be heated housed in the storage space can be heated by irradiation with the microwaves. bag. Any of claims 1 to 3, wherein in the packaging bag, radio waves can be transmitted through the tin-deposited film, and communication is possible between the electronic data reading device and the electronic data storage medium attached to the packaging bag. The packaging bag described in. In the packaging bag, the first synthetic resin film and the tin vapor-deposited film are bonded by a transparent first adhesive layer applied to any of the films, and the tin vapor-deposited film and the printing film are bonded to each other. The packaging bag according to any one of claims 1 to 4, which is joined by a transparent second adhesive layer applied to any of the above. The composite film contains a UV blocking agent layer that blocks ultraviolet rays, and the UV blocking agent layer is applied to either the printing film or the second adhesive layer, or the second adhesive. The packaging bag according to claim 5, wherein the packaging bag is coated on any one of the layer and the tin-deposited film, or is applied to any of the tin-deposited film and the first adhesive layer. The tin-deposited film is composed of a second synthetic resin film made of a transparent thermoplastic synthetic resin and a tin-deposited layer deposited on either the inner surface or the outer surface of the second synthetic resin film. The packaging bag according to any one of claims 1 to 6, which is formed. On the surface of the second synthetic resin film on which tin is vapor-deposited, an existing portion where the tin-deposited layer exists and a non-existing portion where the tin-deposited layer does not exist are formed. The surface of the resin film is covered with the tin vapor deposition layer, and in the non-existent portion, the surface of the second synthetic resin film is exposed and the second synthetic resin film and the first synthetic resin film or the printing film are exposed. The packaging bag according to claim 7, which faces each other. The ratio of the presence portion of the tin-deposited layer to the unit area of the second synthetic resin film is in the range of 75 to 97%, and the ratio of the non-existence portion of the tin-deposited layer to the unit area of the second synthetic resin film. However, the packaging bag according to claim 8, which is in the range of 3 to 25%. The tin-deposited layer is colorless silver or colored silver, and the tin-deposited film has glossy or semi-glossy properties to improve the aesthetic appearance, and the packaging bag can be visually recognized from the outer surface to the inner surface. The packaging bag according to any one of claims 7 to 9, which has a concealing property that makes it impossible. The method according to any one of claims 1 to 10, wherein the printing film is a transparent vapor-deposited film having a gas barrier property and a water vapor barrier property, and the predetermined drawing is printed on the lower surface of the transparent vapor-deposited film. Packaging bag. Any of claims 1 to 11, wherein the thickness dimension of the first synthetic resin film is in the range of 45 to 55 μm, and the thickness dimension of the tin-deposited film and the printing film is in the range of 10 to 14 μm. The packaging bag described in Crab. The packaging bag according to claim 12, wherein the thickness dimension of the first and second adhesive layers and the UV blocking agent layer is in the range of 2 to 4 μm.

Images