JPS592665Y2 - packaging - Google Patents

Description

[Detailed Description of the Invention] The present invention particularly relates to a packaging body for packaging liquid foods.

Packaging materials include synthetic resin film, cellophane, paper, aluminum sheet, or a laminate of two or three of these.In particular, when packaging items that require moisture resistance, synthetic resin film and cellophane or Laminated structures with aluminum sheets are commonly used.

These moisture-proof packaging materials, for example, polyethylene film and cellophane, are laminated with an adhesive layer 1 in between as shown in FIG. 3 is used as the outside, and it can be thermally bonded 4 to form a sealed form as shown in Fig. 2, or the sides can be thermally bonded 4 in the shape of palms as shown in Fig. 3 to form a cylindrical shape with a predetermined length. After cutting, the lower edge is thermally bonded 4 to form a bag, and after containing the contents, the upper edge is thermally bonded to form a sealed package.

However, although the above-mentioned package can be obtained at a low cost, it is inevitable that each heat-bonded part (heat-sealed part) protrudes outward from the housing part and becomes bulky and extremely unsightly.

From this, as shown in FIG. 4, for example, by using a packaging material 5 in which heat-adhesive films 2, 2 are arranged on the front and back sides of cellophane 3 with adhesive layers 1, 1 interposed therebetween, the packaging material 5 shown in FIG. In this method, the inner and outer side edges are overlapped and thermally bonded to form an envelope shape, and then the upper and lower edges are thermally bonded to form a package.

In this package, at least the side adhesive portion does not protrude outward, which is advantageous, but as shown in an enlarged view in FIG. There is a concern that there will be direct contact with the adhesive layer, and if the contents are liquid, there will be a problem that some of the adhesive will dissolve and get mixed in with the contents, so it is not suitable for packaging for liquid products. Although it has the above-mentioned advantages, the actual situation is that packaging bodies of the form shown in FIGS. 2 and 3 are used for liquid substances.

The present invention provides a packaging body that has improved the drawbacks and problems of the conventional packaging bodies mentioned above, and as shown in the embodiments in Figs. A cylindrical bag P is formed by the packaging material 12 laminated in at least two layers with the film 10.10 interposed therebetween, with the adhesive layer 11 interposed therebetween, and a side joint 13 extending in the width direction of the bag P.
is thermally bonded 14 in the shape of palms facing outward, and this palms-shaped bonded portion is laid down to one side so that the entire surface of one side surface 15 is thermally bonded 16 to the surface of the cylindrical bag P. It is something to do.

The packaging material 12 used in the package of the present invention is, for example, as shown in FIG. 13, a polyethylene film IOA is laminated on the front side of a cellophane 17, and a polypropylene film IOB is laminated on the back side of the cellophane 17 through adhesive layers 11 and 11. or cellophane 17 as shown in Figure 14.
A three-layer structure in which polyethylene films IOA and IOA are laminated on the front and back sides with adhesive layers 11 and 11 in between is preferable, but as shown in Fig. 15, the polyethylene film IOA
The present invention can also be implemented in a two-layer structure in which a polypropylene film IOB and a polypropylene film IOB are laminated with an adhesive layer 11 interposed therebetween.

However, in order to obtain a package with clear printing, aesthetic appearance, and appropriate hardness, it is necessary to
The three-layer packaging material 12 shown in FIG. can.

In this way, the packaging body according to the present invention is made of a cylindrical shape made of a packaging material 12 which has heat-adhesive synthetic resin films 10. A side joint 13 formed on the bag body and extending in the direction of the cylinder axis is thermally bonded 14 outward in the shape of palms together, and this joint shaped joint is laid down to one side so that the entire surface of one side surface 15 becomes a cylinder. Since it is thermally bonded 16 to the surface of the shaped bag P, the end of the packaging material 12 having the adhesive layer 11 is not exposed inside the bag P and the adhesive is not exposed even when a liquid is packaged. There is no need to worry about it getting mixed into liquids.

Furthermore, since the gassho-shaped joint that exists in the cylindrical axis direction of the package is laid down on the surface of the package and the entire surface of one side is thermally bonded, the joint does not become a protruding piece like in the past. Not only does it have a shape that looks like an envelope-shaped sticker and has an extremely good appearance, but also the gassho-shaped adhesive part is bent at a right angle along the surface of the cylindrical bag, and the cylindrical bag is completely sealed. Since it is integrated with the seal, a perfect seal is obtained, there is no risk of liquid leakage, and the gas barrier property is high, and the strength of the bonded part is also extremely high.

Therefore, it is convenient as a package for foods, especially liquid foods, and the package is excellent in strength and hygienic.

[Brief explanation of the drawing]

Figures 1 to 6 are explanatory diagrams showing packaging materials or thermal bonding modes of conventional packaging bodies, Figures 7 to 15 are illustrations of embodiments of the present invention, and Figures 7 and 8 are An enlarged sectional view of the packaging material, FIG. 9 is a rear view of the packaging bag, FIG. 10 is a sectional view taken along line A-A in FIG. 9, and FIGS. An enlarged sectional view showing the main points, and the 13th
Figures 1-15 are enlarged cross-sectional views of embodiments of the packaging material. 10 is a thermoadhesive synthetic resin film, 11 is an adhesive layer, 1
2 is a packaging material, 13 is a side joint part, 14 is a thermal adhesive part, 15
1 is one side of the gassho-shaped bonded part, 16 is the heat bonded part, and P is the cylindrical bag body.

Claims (1)

[Scope of utility model registration request] A cylindrical bag is formed from packaging materials laminated in at least two layers with a heat-adhesive synthetic resin film on the front and back sides, with an adhesive layer interposed between them. A packaging body that is thermally bonded in a cylindrical bag shape with the palms facing toward each other, and this gaseous palms joint is folded to one side and the entire surface of one side is thermally bonded to the surface of a cylindrical bag.