JP2011111163A - Packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attractive, beautifully-designed packaging bag more glossy than a packaging bag that uses an aluminum foil. <P>SOLUTION: The packaging bag includes a sheet formed by arranging at least a base material, an adhesive layer, and a thin metal layer in that order one on another, and has an opening in the upper part thereof, part of the sheet has a plurality of vertically discontinuous lines arranged alternately. Further, the sheet is formed by forming a resin layer on the thin metal layer. In addition, a fold is formed in the bottom of the packaging bag. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a packaging bag having a metallic luster on its surface and having a gorgeous and cosmetic appearance.

  Various functions are required for packaging bags. One is a protective function that prevents the contents from deteriorating, and a function that facilitates handling during transportation and transportation is required. Some are required to have sex.

  Conventionally, as a packaging bag having a cosmetic property, there is a packaging bag that gives a glittering feeling with a special ink in which mica pieces are dispersed. Moreover, the bag which calculated | required metallic luster using the aluminum foil was used for the gift (patent document 1). Such a metallic glossy packaging bag using an aluminum foil was also used as a simple packaging bag for gifts in which bottled wine or the like was put and the upper part was bound with a ribbon.

  On the other hand, a packaging bag is also used in which the packaging bag is provided with cuts that are intermittent in the vertical direction and the horizontal direction (Patent Document 2).

  Known documents are shown below.

Japanese Patent Application Laid-Open No. 2005-219751 Japanese Utility Model Publication No. 61-69043

  A packaging bag using an aluminum foil has a glossy but not sufficient, and there is a demand for a packaging bag that is more glossy and has an eye-catching makeup. It is an object of the present invention to provide a packaging bag that is more glossy than a packaging bag using an aluminum foil and has an eye-catching beauty.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention of claim 1 is a bag comprising at least a base body, an adhesive layer, and a metal thin film layer sequentially laminated, and having an opening at the top. The packaging bag is characterized in that a part of the sheet body has a plurality of intermittent cut lines arranged in a staggered pattern in the vertical direction.

  By having a structure in which a base material, an adhesive layer, and a metal thin film layer are sequentially laminated, the surface emits a metallic luster, and vertical discontinuities in which cuts are arranged in a staggered manner in a part of the sheet body Since there are multiple cut lines, when wrapping a bottle of wine or other items to be wrapped, the cuts open, the surface bends, and any surrounding light is reliably reflected when viewed. , The feeling of glitter is improved.

  In addition, since the cut line is in the vertical direction, it can be easily packaged without being caught in the cut line when putting an article to be packaged.

  A second aspect of the present invention is the packaging bag according to the first aspect, wherein the sheet is further laminated with a resin layer on the metal thin film layer. is there.

  In the above configuration, since the metal thin film is further protected, the metallic luster is maintained, and the luster is not lost due to wear or scratches.

  A third aspect of the present invention is the packaging bag according to the first or second aspect, wherein a folding part is provided at the bottom of the packaging bag.

  Furthermore, since the folding part is provided in the bottom part of the packaging bag, it has a self-supporting property, so that it can stand up stably when the packaged item is put in the packaging bag.

  The packaging bag of the present invention has an unprecedented metallic luster and has eye-catching cosmetic properties. Moreover, when putting an article to be packaged, it can be easily packaged without being caught by a cut. It is resistant to wear and scratches, is not easily lost in gloss, and can stand up stably.

It is sectional drawing which shows the basic structure of the sheet | seat body used for this invention. It is sectional drawing which shows laminated sheet B1 used for manufacture of the sheet | seat body used for this invention. It is sectional drawing which shows laminated sheet B2 used for manufacture of the sheet | seat body used for this invention. It is the schematic which shows the state which introduce | transduces the integrated sheet which laminated | stacked lamination sheet B1 and lamination sheet B2 to an electron beam irradiation apparatus. It is the schematic which shows the state which manufactures lamination sheet B3 from the integrated sheet after electron beam irradiation. It is explanatory drawing showing the shape of the several intermittent cut | interruption line provided in the sheet | seat body of this invention. It is a top view showing one embodiment of the packaging bag of the present invention. It is a perspective view showing other embodiment of the packaging bag of this invention.

Hereinafter, modes for carrying out the present invention will be described.
FIG. 1 shows a basic cross-sectional structure of a sheet used in the present invention. This sheet body has a structure in which an adhesive layer 2, a metal thin film layer 3, and a resin layer 4 are laminated in this order on one surface of a substrate 1. However, the resin layer 4 is not always necessary.

  The substrate 1 in the sheet body is not particularly limited, and for example, a resin film, a foamed resin sheet, paper, a woven fabric, a nonwoven fabric, a synthetic paper, or the like can be used. Among these, coated paper is particularly preferable from the viewpoint of cost and quality. When using coated paper as the substrate 1, the adhesive layer 2 is formed on the metal thin film layer 3 side and bonded to the substrate 1, or the adhesive layer 2 is formed on the substrate 1 side and bonded. May be.

The adhesive layer 2 is a layer for adhering and fixing the base material 1 and the metal thin film layer 3, and is formed using an electron beam curable adhesive. Examples of the adhesive include an adhesive such as an acrylate having an acryloyl group that is irradiated with an electron beam to be ionized or excited in the molecule by the electron beam energy, and a radical is generated to cause a polymerization reaction. Resin can be used.

  In addition, such an adhesive does not require heating during curing, and a three-dimensional cross-linked structure is formed in a short time by irradiation with a low dose of electron beam, so that no aging treatment as in conventional thermosetting is required. It is a suitable adhesive in terms of thermo economy and productivity. The adhesive layer 2 formed by curing the adhesive by electron beam irradiation is hard as a whole because the cured product is a three-dimensional cross-linked structure, and even when heat is applied, the portion is not thermally softened. . Then, the sheet body produced by the flexibility of the resin itself is imparted with moderate flexibility as a whole, and at the same time, the surface is prevented from being deformed and its gloss is distorted.

  The thickness of the adhesive layer 2 is not particularly limited. However, if the thickness is too thin, the adhesive layer 2 does not exhibit a sufficient adhesive force with the metal thin film layer 3 formed thereon, and is too thick. As a result, the sheet body as a whole becomes less flexible. Therefore, the thickness of the adhesive layer 2 is preferably about 2 to 15 μm. The metal thin film layer 3 is not particularly limited, but examples thereof include a thin layer such as Al, Cu, Zn, Sn, and Si.

When the resin layer 4 formed thereon is a transparent resin layer, the metal thin film layer 3 can give a metallic texture to the sheet body and give a high-class feeling. Further, the thickness of the metal thin film layer 3 is preferably 10 to 100 nm, and if it is thinner than 10 nm, the surface is not smooth, and further, light is transmitted and the metallic luster cannot be obtained. When it is thicker than 100 nm, the production efficiency is deteriorated.

  The resin layer 4 formed on the metal thin film layer 3 functions as a protective layer for the metal thin film layer 3 and at the same time functions as a primer for imparting printing suitability. The resin constituting the resin layer 4 is not particularly limited as long as it is a resin that can function as a primer that imparts printing suitability.

  For example, polyester resins, urethane resins, cellulose resins, vinyl chloride / vinyl acetate copolymer resins, acrylic resins and the like alone or a mixture thereof, and isocyanate compounds having a bifunctional or higher functional isocyanate group in the resin alone or in the mixture What added 1 to 10% etc. can be mention | raise | lifted.

  The resin layer 4 is preferably highly transparent or may be colored. By being a transparent resin layer, the metallic tone of the metal thin film layer 3 positioned therebelow can be visually recognized, and the decorative effect as a sheet body can be enhanced.

  This sheet body can be continuously manufactured as follows. First, the resin film 5 is continuously supplied to, for example, a vacuum deposition apparatus, and a desired metal is continuously vacuum-deposited on one surface 5a thereof to form a metal thin film layer 3 having a predetermined thickness, as shown in FIG. Such a laminated sheet B1 is continuously manufactured.

  Thereafter, a predetermined thickness of the adhesive layer 2 is formed by continuously applying a predetermined electron beam curable adhesive to the metal thin film layer 3 side of the laminated sheet B1, and the laminated sheet B2 as shown in FIG. Is manufactured continuously. Moreover, you may apply | coat the said adhesive agent to the base material 1 side.

As the resin film 5, a biaxially stretched resin film is used. As long as it is a biaxially stretched resin film, a general-purpose resin film such as a biaxially stretched nylon film, a biaxially stretched polyethylene terephthalate film, or a biaxially stretched polypropylene film can be used.

  In particular, in consideration of peeling off the metal thin film layer in a subsequent step, it is preferable to use a biaxially stretched polypropylene film having low adhesion to the metal thin film layer.

  And the single side | surface of the base material 1 which is continuously running, and the surface on the side of the adhesive layer 2 of the laminated sheet B2 which is also continuously running are continuously superposed and integrated through a pair of pressure-bonding rolls 6a and 6b. As shown by the arrows in FIG. 4, it is continuously introduced into the electron beam generator 7.

  The integrated sheet travels in the electron beam generator 7, and in the process, the electron beam E of the adhesive layer 2 is applied by irradiating a predetermined dose of the electron beam E from the resin film side. , Continuously derived from the device 7. The energy of the irradiation electron beam at this time varies depending on the type of adhesive used and the type of resin film, but is usually a dose of 1.5 to 5 MRad.

  Next, the integrated sheet derived from the apparatus 7 passes through the pair of pressure-bonding rolls 6c and 6d, and then the resin film is continuously peeled as shown in FIG. A sheet B3 is obtained in which the metal thin film layer 3 is integrated with the adhesive layer 2 cured by electron beam.

  By transferring the metal thin film obtained by vapor deposition in this way, a very smooth surface with excellent metallic luster can be obtained. By using this, a brilliant and cosmetic packaging bag can be obtained. .

  Finally, a predetermined resin is continuously applied to the surface of the metal thin film layer 3 of the laminated sheet B3 and then cured to form a resin layer 4 having a predetermined thickness, whereby the sheet body shown in FIG. Manufactured continuously.

  A plurality of intermittent cut lines in the vertical direction in which cuts penetrating the sheet body are arranged in a staggered manner are provided in a part of the completed sheet body. A plurality of intermittent cut lines arranged in a staggered pattern in the vertical direction means that a plurality of cut lines are formed in a straight line and a plurality of cut lines are arranged in parallel in the vertical direction. The cuts are not adjacent to each other but are shifted up and down. Here, the vertical direction means that when the bag is formed, the opening of the bag is the upper part, and the direction perpendicular to the opening is the vertical direction.

  As shown in FIG. 6, the shape of the cut 8 is a plurality of 10 to 15 mm cuts, with 2 to 3 mm uncut portions sandwiched between them, and straight cut lines 9 separated from each other by 1.5 to 2.5 mm. Arranged in parallel, the vertical positions of the cut lines 8 are provided by shifting the phase by a half pitch between adjacent cut lines 9 with each cut line and one non-cut part as one pitch.

  In order to provide the cut line 9, when the sheet body is in a continuous band shape, a slit is formed in a portion that hits the blade by passing the belt-shaped sheet body between the roll in which the blade is implanted and the roll of the receiving blade. However, mass production is preferable. In addition, after bag making, a cut may be provided by sandwiching between a plate in which a blade is implanted and a receiving plate and pressing.

As the shape of the bag, as shown in FIG. 7, a sheet body cut into a square shape is folded into a cylindrical shape, both ends are overlapped, an envelope is pasted to form a back pasting portion 10, and the bottom portion is provided with a paste margin portion 11. It is good also as the shape same as the envelope for mail by folding and sticking a glue margin part.

  Further, in order to obtain a packaging bag having the folding portion 12 at the bottom, a vertically long sheet body having a length obtained by adding the vertical length of the packaging bag and the length of the folding is doubled as shown in FIG. Then, it suffices to fold it in two and further provide the folding part 12 at the bottom. In this case, it is necessary to adhere the side 13, but it may be pasted with glue, or the sheet body may have a heat-meltable resin layer on the inner side and heat-sealed.

  Although the above two shapes have been described as the bag shape, they are not necessarily limited to this shape. Any packaging bag having an opening at the top may be used. The packaging bag has a cylindrical shape or a prismatic shape with a rounded corner, and the circumference of the cylinder or the length of the circumference of the prism does not open the packaging bag. If the width of the storage portion of the packaging bag is larger than twice the width of the storage portion of the packaging bag and smaller than twice the width of the storage portion of the packaging bag when the cut of the packaging bag is opened, the packaged item can be stored. At that time, the cuts made in the packaging bag are surely opened, the surface of the packaging bag is bent, and when viewed, any surrounding light is reliably reflected, making it feel like never before Is obtained.

1. Base material
2 ... Adhesive layer
3 ... Metal thin film layer 4 ... Resin layer
5 ... Resin film
5a: surface of the resin film 5
6a, 6b, 6c, 6d ... crimping roll
7 ... Electron beam irradiation device E ... Electron beam 8 ... Cut 9 ... Cut line 10 ... Back sticking part 11 ... Paste part 12 ... Folding part 13 ... Side Neighborhood

Claims (3)

  At least a base material, an adhesive layer, and a sheet body formed by sequentially laminating a metal thin film layer, and a bag having an opening at the top thereof, wherein the sheet body has a longitudinal direction in which cuts are arranged in a staggered manner. A packaging bag comprising a plurality of intermittent cut lines.   The packaging bag according to claim 1, wherein the sheet body is further laminated with a resin layer on the metal thin film layer.   The packaging bag according to claim 1, wherein a folding portion is provided at a bottom portion of the packaging bag.

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