JP2005178892A - Merchandise packaging structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a merchandise packaging structure which secures sufficient and even adhesive force even when a seal part is printed, which does not leave a large transparent area in the seal part, and which efficiently heat seals with practically no melted printing layer attached to a heater. <P>SOLUTION: This merchandise packaging structure has a printing layer 4b on a seal face 4a side. One film 4f having a printing layer 4b on a seal face 4a side and a film layer 4e on a heater contact face 4d side and the other film 4j having a film layer 4g on the seal face 4a side and a printing layer 4c on a heater contact face 4h side face each other for heat sealing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a product packaging structure provided with a seal portion formed by heat-sealing a packaging film with a heater.

  Conventionally, for example, as shown in Patent Document 1 below, in a shrink wrapping body in which an object to be packaged including an instant food container or the like is covered with a heat-shrinkable packaging film, both side portions of the packaging film are provided. By superposing and heat-sealing each other, a vertical seal part (gap-attaching part) along the vertical direction of the package is formed, and both ends of the packaging film located on the top and bottom surfaces of the package are packaged. After fusing and sealing in the radial direction of an object, the packaging film is brought into close contact with an object to be packaged by heating and shrinking the heat-shrinkable packaging film with hot air from a heating device.

And in the packaging structure of such a product, when printing on a package, from the viewpoint of protecting the print layer, the print layer is arranged on the package side of the film, and the film layer is arranged on the outer surface side of the package There was a configuration to do.
JP 09-255029 A

  However, in the product packaging structure described above, when a printed layer is disposed on the packaged object side and a film layer is disposed on the outer surface side of the package, heat sealing is performed at a seal portion such as a vertical seal portion or a fusing seal portion. In this case, the printing layer and the printing layer are arranged on the sealing surface side, and this overlapping printing layer can prevent the welding between the films and ensure a sufficient and uniform welding force on the sealing surface. There wasn't.

  As a result, when the film is a single layer, it is not possible to print on the seal portion such as the longitudinal seal portion or the fusing seal portion, and the appearance of the product is impaired, for example, a large transparent area remains only in these portions. There was a problem that.

  In addition, when the film is multi-layered, it is known that printing can be performed on a seal portion such as a vertical seal portion or a fusing seal portion by disposing a print layer between the layers. When the print layer was arranged, there was a problem similar to the case of the single layer.

  On the other hand, in order to secure a sufficient and uniform welding force on the sealing surface, if a structure is adopted in which each film layer is arranged on the sealing surface side and each printing layer is arranged on the heater contacting surface side, the heater contact There was a problem that the printed layer on the surface was melted and adhered to the heater, requiring maintenance, and heat sealing could not be performed efficiently.

  The present invention has been made in view of the above problems, and can ensure a sufficient and uniform welding force even in a state where printing is performed on the seal portion, so that a large transparent region remains in the seal portion. It is an object of the present invention to provide a packaging structure for products that can be heat-sealed efficiently without causing the printed layer to adhere to the heater.

  The present invention for solving the above problems is a packaging structure for a product having a seal portion formed by heat-sealing a packaging film with a heater, and the seal portion has a printed layer on the seal surface side. The sealing surface of one film which arranges and arranges a film layer on the heater contact surface side, and the other film which arranges a film layer on the seal surface side and arranges a printing layer on the heater contact surface side A product packaging structure characterized by being heat-sealed so as to face each other.

  According to the present invention, since the film layer is arranged on the seal surface side of the other film, the print layer and the print layer do not overlap with each other on the seal surface, so that the seal portion can be welded even in a printed state. .

  Therefore, a large transparent region does not remain in the seal portion, and the appearance of the product is not impaired.

  Next, the printed layer on the seal surface side of the one film is preferably a film layer partially exposed.

  According to this preferred embodiment, since the film layer is partially exposed in the printed layer on the seal surface side of one film, the partially exposed film layer of this one film and the film of the other film As a result of the welding of the layers, a sufficient welding force can be ensured.

  Moreover, it is preferable that the printing layer by the side of the sealing surface of said one film is what exposed the film layer partially by having a striped pattern.

  According to this preferred embodiment, since the printing layer on the sealing surface side of one film is formed in a striped printing pattern and partially exposes the film layer in a slit shape, uniform welding is performed on the sealing surface. Power can be secured.

  Further, a large transparent region does not remain in this portion, and the appearance of the product is not impaired as long as the printed pattern is a striped pattern.

  Furthermore, the film layer on the heater contact surface side of the one film is for contact with a high temperature heater, and the print layer on the heater contact surface side of the other film is for contact with a low temperature heater. It is preferable that

  According to this preferred embodiment, since the high-temperature heater is in contact with the film layer of one film, even if the printing layer of this one film is melted, it hardly heats up and efficiently heat-seals at a high temperature. can do. Further, the low-temperature heater contacts the print layer of the other film, but as a result of the temperature of the print layer of the other film not increasing, the molten print layer hardly adheres to the heater.

  As described above, according to the present invention, a sufficient and uniform welding force can be ensured even in a state where printing is performed on the seal portion, and a transparent region remains large in the seal portion. There is a remarkable effect of not. In addition, there is a remarkable effect that the print layer can be efficiently heat-sealed with almost no adhesion to the heater.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 to 2 are perspective views showing a configuration of a product packaging structure 10 according to an embodiment of the present invention. FIG. 1 is a diagram of the product packaging structure 10 viewed from obliquely above, and FIG. The figure which looked at the packaging structure 10 of goods from diagonally downward is shown, respectively. FIG. 3 is a plan view showing a film sheet 2 a of the packaging film 2. 4 is a cross-sectional view showing the configuration of the vertical seal portion 3 of the product packaging structure 10, wherein (a) is a cross-sectional view of the vertical seal portion 3 as viewed from the front, and (b) is a vertical seal portion. 3 is a cross-sectional view as seen from the side. FIG. 5 is a cross-sectional view showing the configuration of the fusing seal portion 4 of the product packaging structure 10, (a) is a cross-sectional view of the fusing seal portion 4, and (b) is a front view of the fusing seal portion 4. Respectively.

  With reference to FIGS. 1-5, the packaging structure 10 of the goods which concerns on embodiment of illustration of this invention coat | covered the to-be packaged object 1 with the film 2 for packaging which has heat shrinkability, As a seal part formed by heat sealing with a heater, a vertical seal part 3 and a fusing seal part 4 are provided, and the packaging film 2 covering the package 1 is thermally shrunk to adhere to the package 1 It is configured to let you.

  In the present embodiment, the package 1 contains food such as instant noodles inside a lightweight rectangular deep dish container made of expanded polystyrene or the like, and is covered with a laminate of paper and polyethylene. It is.

  In the present embodiment, the packaging film 2 is printed with a product name, a trademark, and a visual indication of other products on a transparent film made of an ultrathin heat-shrinkable polypropylene sheet having a thickness of about 12 μm to 30 μm. As shown in FIG. 3, the longitudinal film sheets 2 a provided on both sides of the film sheet 2 a on the bottom surface of the package object 1 so as to cover the long film sheet 2 a from above the package object 1. After the seal part 3 is heat-sealed, the fusing seal part 4 provided in the longitudinal direction of the film sheet 2a is fusing-sealed, thereby packaging each packaged item 1 one by one.

  And this film sheet 2a has the lower surface printed layer 2b in the package 1 side of the lower surface as a printed layer of a visual marking, and the upper surface printed layer 2c in the upper surface. The bottom printed layer 2b enables visual indication of the product through the transparent packaging film 2, and will be described in detail later. One of the films 4f of the fusing seal part 4 (FIG. 5). The stripe pattern 2d which comprises the printing layer 4b of this is included. Further, the upper surface printing layer 2c supplements the visual indication of the lower surface printing layer 2b and constitutes the printing layer 4c of the other film 4j (FIG. 5) of the fusing seal portion 4.

  As shown in FIG. 4, the vertical seal portion 3 is a portion formed by polymerizing and heat-sealing the left and right side portions 2 e and 2 f of the packaging film 2. In the present embodiment, the vertical seal portion 3 is mainly located on the back side of the product and has little need for printing. Therefore, as shown in FIG. 3, the print layer is not provided on the film. In a transparent state, heat sealing is performed so that the film layers of one film 3f and the other film 3j face each other.

  In the vertical seal portion 3, the left and right side portions 2 e and 2 f of the packaging film 2 have a margin for film, so that it is possible to seal with a width of about 10 mm. Even if the printing layer slightly penetrates into the seal width, a sufficient and uniform welding force can be secured.

  The fusing seal part 4 is a part formed by fusing and sealing the film sheet 2a after the vertical seal part 3 is formed. As shown in FIG. 5, the print layer 4b is arranged on the seal surface 4a side. In addition, one film 4f disposing the film layer 4e on the heater contact surface 4d side, and the other film 4j disposing the film layer 4g on the seal surface 4a side and disposing the printing layer 4c on the heater contact surface 4h side, The sealing surfaces 4a are fused and sealed so as to face each other.

  Further, as described above, the print layer 4b on the seal surface 4a side of the one film 4f has a striped print pattern so that the film layer 4e is partially exposed and welded to the film layer 4g. Is configured to be possible.

  Next, with reference to FIG. 6 and FIG. 7, the operation of the product packaging structure 10 according to the embodiment of the present invention will be described while showing the processing method of the product packaging structure 10 according to the embodiment of the present invention. To do.

  FIG. 6 is a conceptual diagram showing a packaging device 20 for forming the product packaging structure 10 according to the embodiment of the present invention, and FIG. 7 shows the product packaging structure 10 according to the embodiment of the present invention. It is a conceptual diagram which shows the process to form. 7A shows a state in which the packaging film 2 is covered from the top of the article 1 to be wrapped, FIG. 7B shows a state in which the vertical seal portion 3 is sealed, and FIG. 7C shows a fusing seal portion 4. FIG. 6D shows a state before the fusing seal part 4 is fused and sealed.

  Referring to FIG. 6, a packaging device 20 for forming a product packaging structure 10 according to an embodiment of the present invention has left and right sides of a packaging film 2 fed from a feeding roll 21 as shown in the figure. The former 22 that guides the portions 2e and 2f (FIG. 4) downward to curve the film sheet 2a into a circular arc shape and the left and right side portions 2e and 2f (FIG. 4) of the film sheet 2a are superposed and heat sealed. The heating sealer 23 which is a heater for forming the vertical seal portion 3, the guide portion 24 for folding the vertical seal portion 3, the seal cutter 25 for forming the fusing seal portion 4, and the packaging film 2 is heated by sending hot air And the above-mentioned seal cutter 25 includes a high-temperature heater 25a for heating the film layer 4e of one film 4f and the other film. And a low-temperature heater 25b for heating the print layer 4c of beam 4j.

  Here, the film sheet 2a fed from the feeding roll 21 is supplied to the former 22 and, as shown in FIGS. 7A and 7B, is bent and then supplied to the heat sealer 23. The left and right side portions 2e and 2f (FIG. 4) of the film sheet 2a are superposed and heat sealed to form a vertical seal portion 3 as shown in FIG. 7B.

  Next, after the longitudinal seal portion 3 is folded back by the guide portion 24, the film sheet 2a after the formation of the longitudinal seal portion 3 is fused while being heat sealed as shown in FIG. Is formed (FIGS. 7C and 7D).

  At this time, the film layer 4e on the heater contact surface 4d side of the one film 4f is heated to a high temperature (about 220 ° C. in the present embodiment) at which the fusing seal portion 4 can be sufficiently fused and sealed. However, since the printing layer 4b does not directly contact the high temperature heater 25a, even if the printing layer 4b melts, it hardly adheres to the high temperature heater 25a. Further, the printing layer 4c on the heater contact surface 4h side of the other film 4j can weld the fusing seal portion 4 but does not melt the printing layer 4c (in this embodiment, about 70 ° C.). Although the low-temperature heater 25b heated is contacted, the temperature of the low-temperature heater 25b is low, so that the printed layer 4c is hardly melted and attached to the heater.

  Thereafter, by sending hot air from the heating device 26, the packaging film 2 is heated and closely adhered to the package body 1 to be thermally shrunk to form the packaging structure 10 for the product.

  As described above, according to the product packaging structure 10 according to the embodiment of the present invention, since the film layer 4g is disposed on the seal surface 4a side of the other film 4j, the printed layer 4b and the seal surface 4a As a result of the printing layer 4c not overlapping, it can be welded even when the seal portion is printed.

  Therefore, a large transparent region does not remain in the seal portion, and the appearance of the product is not impaired.

  Next, when the film layer 4e is partially exposed in the printed layer 4b on the seal surface 4a side of one film 4f as in the packaging structure 10 of this product, a part of the one film 4f is partially exposed. As a result of the welding of the film layer 4e exposed to the film 4g and the film layer 4g of the other film 4j, a more sufficient welding force can be secured.

  Moreover, like the packaging structure 10 of this product, the print layer 4b on the seal surface 4a side of one film 4f is formed in a striped print pattern, and the film layer 4e is partially exposed in a slit shape. In this case, a uniform welding force can be secured on the seal surface 4a.

  Further, a large transparent region does not remain in this portion, and the appearance of the product is not impaired as long as the printed pattern is a striped pattern.

  Further, in the case of this product packaging structure 10, the high temperature heater 25a contacts the film layer 4e of the one film 4f, and therefore adheres to the high temperature heater 25a even if the printed layer 4b of the one film 4f melts. There is little to do, and heat sealing can be efficiently performed at a high temperature. Further, since the low-temperature heater 25b is in contact with the print layer 4c of the other film 4j, the temperature of the print layer 4c of the other film 4j does not increase, so that the molten print layer 4c adheres to the heater. rare.

  The above-described embodiment is merely a preferred specific example of the present invention, and the present invention is not limited to the above-described embodiment.

  For example, the package 1 is not necessarily limited to a lightweight rectangular deep dish container made of expanded polystyrene or the like containing instant food such as instant noodles. The present invention can be applied to various forms of packages.

  Further, the packaging film 2 is not necessarily limited to an extremely thin heat-shrinkable polypropylene sheet, and various materials can be employed. Furthermore, the packaging film 2 may be a single layer or a laminate of various materials.

  The vertical seal portion 3 is not necessarily required to be heat-sealed so that the film layers of the one film 3f and the other film 3j face each other in a transparent state. For example, similarly to the fusing seal portion 4 One film 3f that arranges the print layer on the seal surface side and the film layer on the heater contact surface side, and the other that arranges the film layer on the seal surface side and the print layer on the heater contact surface side It is also possible to be configured to be heat-sealed so that the respective sealing surfaces of the film 3j face each other.

  In addition, the packaging device 20 for forming the product packaging structure 10 is not necessarily limited to the illustrated configuration including the former 22, the heat sealer 23, the guide portion 24, the seal cutter 25, and the heating device 26. . For example, the packaging film is tensioned, and the surface of the packaging film is pushed up against the packaging film to cover the surface, and the front and rear and left and right ends of the packaging film are covered by the left and right folding plates and the front and rear folding plates. It is also possible to employ a stretch wrapping method that is folded toward the center and fixed by means such as heat sealing.

It is a perspective view which shows the structure of the packaging structure of goods which concerns on embodiment of this invention, and has shown the figure which looked at the packaging structure of goods from diagonally upward. It is a perspective view which shows the structure of the packaging structure of goods which concerns on embodiment of this invention, and has shown the figure which looked at the packaging structure of goods from diagonally downward. It is a top view which shows the film sheet of the film for packaging. It is sectional drawing which shows the structure of the vertical seal part of the packaging structure of goods, (a) is sectional drawing which looked at the vertical sealing part from the front, (b) is sectional drawing which looked at the vertical sealing part from the side, respectively. Show. It is sectional drawing which shows the structure of the fusing seal part of the packaging structure of goods, (a) is sectional drawing of a fusing seal part, (b) has each shown the front view of the fusing seal part. It is a conceptual diagram which shows the packaging apparatus for forming the packaging structure of goods. It is a conceptual diagram which shows the process of forming the packaging structure of goods, (a) is the state which covered the film for packaging from the to-be-packaged object, (b) is the state which sealed the vertical seal | sticker part, (c) Is the state before fusing and sealing the fusing seal portion, and (d) shows the fusing and sealing state of the fusing seal portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Package 2 Packaging film 2e, 2f Side 2d Stripe pattern 3 Vertical seal part (seal part)
4 Fusing seal part (seal part)
4a Seal surface 4b, 4c Print layer 4d, 4h Heater contact surface 4e, 4g Film layer 4f One film 4j The other film 10 Product packaging structure 25a High temperature heater 25b Low temperature heater

Claims (4)

A packaging structure for a product having a seal portion formed by heat-sealing a packaging film with a heater,
The seal portion includes a print layer on the seal surface side and a film layer on the heater contact surface side, and a film layer on the seal surface side and a print layer on the heater contact surface side. A product packaging structure characterized by being heat-sealed so that the respective sealing surfaces of the other film to be arranged face each other.   2. The product packaging structure according to claim 1, wherein the printed layer on the seal surface side of the one film is a film layer partially exposed.   3. The product packaging structure according to claim 2, wherein the print layer on the seal surface side of the one film has a striped print pattern and the film layer is partially exposed.   The film layer on the heater contact surface side of the one film is a contact with a high temperature heater, and the print layer on the heater contact surface side of the other film is a contact with a low temperature heater. The packaging structure for goods according to any one of claims 1 to 3.

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