JPH08301297A - Double bag - Google Patents

Abstract

PURPOSE: To obtain a double cylindrical bag consisting of two inner and outer plastic layers and having a bright printing part generating no wet stain like spots caused by packed oily food and attracting attension provided to the outer bag thereof. CONSTITUTION: Plastic films forming two inner and outer layers are superposed one upon another without being bonded and both side edges of them are folded back to be abutted each other and a back bonded edge 1 is formed on the rear side by fusion and one end edges of them are fused to form a bottom edge 2 to obtain a double cylindrical bag 3. Bright printing 4 is applied to a part of the surface of the outer bag 3' of the cylindrical bag 3 and the other part thereof is kept transparent to keep the inner bag 3" transparent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double plastic bag.

[0002]

2. Description of the Related Art When a light-colored printing section is applied to a single plastic bag, and then fried confectionary bread, fried sponge cake (round boro, etc.) is packaged and sealed, the oil on the surface of the packaged confectionery is protected by the light-colored printing section. The back surface was contacted, and the surface of the contacting part was spotted in a wet state, and the packaging surface appeared to be in a dirty state, and the quality of the packaged product was deteriorated in appearance.

Therefore, a double bag is formed by manually inserting a bag that is slightly smaller than the single pouch into a single pouch, or by inserting a folded sheet as shown in FIG. In such a manufacturing method, it is necessary to manually pack the inner bag and the sheet, and manual work is required in bag production, which does not improve the production efficiency, so that it takes a long time to deliver the product. This is a major issue for packaging bag manufacturers who are trying to reduce costs.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when packaging a surface oily confectionery such as a round boro or a confectionery bread in a plastic cylindrical bag, the light-colored portion expressed in the transparent cylindrical bag is wetted or damaged. An object of the present invention is to easily obtain a packaging bag of good quality without causing spots.

[0005]

In order to achieve the above-mentioned object, the present invention has a structure in which two layers of inner and outer layers of plastic film are laminated without adhering to each other and both side edges are folded back to form a back sticking edge by welding. A double tubular bag having a welded bottom edge at one end, in which light-color printing is applied to a part of the outer bag of the tubular bag, the other part is kept transparent and the inner bag is kept transparent Done 2
Instead of the double-ply seam folding back, instead of forming the double-bag back sticking edge welded by forming a gusset on both side edges and folding back 2
The inner surfaces of the stacked layers of the set are faced to each other, and both side edges and one end edge are welded by four layers, and are constituted by the double bag of the first invention.

[0006]

In the present invention, when the fried sponge cake such as a round boro is housed in the inner layer of the double cylindrical bag, the cake surface comes into contact with the inner surface of the transparent inner layer. Therefore, the oil on the surface of the cake is transparent even if it is attached to the transparent inner layer, so that the spots due to the oil do not occur.

Therefore, the light-colored printed portion of the outer layer which is in contact with the interior without spot-like spots does not have spot-like spots.

[0008]

[Examples] At least one or more kinds of plastic films c and d are dry-laminated to form original fabrics c ′ and d ′ by winding them together without applying an adhesive,
The original fabrics c ′ and d ′ are subjected to slit processing and bag-making processing to provide a double-cylindrical bag 3 which is a pouch. That is, a film corresponding to the outer bag 3'and the inner bag 3 "can be obtained at a time by simply combining the two plastic films c and d, respectively, and after that, slit processing and bag manufacturing processing are performed, and easily shown in FIG. Gassho bag or gusset bag shown in FIG. 6 or FIG.
The three-way welding bag shown in is obtained.

The film c of the outer bag 3'to be used is a film d which can be heat-sealed to the inner bag 3 ", and the inner bag 3" itself can be heat-sealed.

FIG. 1 shows an embodiment of a double tubular bag 3 which is a joint bag according to one embodiment of the present invention. In this double cylindrical bag 3, the outer bag 3'is a stretched polypropylene heat-sealing type (50μ), and the inner bag 3 "is formed of a packing material made of unstretched polypropylene. 1
2 is shown in FIG.
3 is a cross-sectional view of the outer bag 3'and the inner bag 3 ".

The above-mentioned pouch is formed in the following steps. First, front or back surface printing is performed on the corona-treated surface of the stretched polypropylene heat seal type c. Next, as shown in FIG. 3, the stretched polypropylene c heat-sealed surface and the unstretched polypropylene d are combined by dry lamination without applying an adhesive. The raw fabric A obtained by combining the two films c and d is subjected to slit processing and bag-making processing to weld 2 polymerized palm bags or gusset bags (FIG. 7) or 3 edges 2, 2 ', 2'. A three-way welding bag (Fig. 8) is obtained.

As described above, the heat-meltable uniaxially oriented polypropylene c (HOP) is used for the outer bag 3 ', and the unstretched polypropylene (CPP) d is used for the inner bag 3 ". 3'is yellow on the front or back,
White, white-blue, pink and other light-colored prints 4 are applied,
The other portion and the inner bag 3 ″ are transparently held so that the stored product can be identified from the outside.

The product is a confectionery such as a fried sponge cake having a greasy surface or a meat food 7. The oil on the surface is in contact with the inner surface of the inner bag 3 ", but the inner bag 3" is transparent. Stain-like spots (wet spots that disappear when the interview is separated) cannot be formed, and oil-like spots do not occur on the light-colored printed portion 4 of the outer bag 3 ′.

In the figure, C'denotes a uniaxially stretched polypropylene (HOP) c'stock, d'is an unstretched polypropylene (CPP) d stock, A is a multilayer plastic stock,
Reference numeral 5 is a tubular molding machine, 6 is a welding cutting machine, and 8 is a gusset portion.

[0015]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, a double layer of a plastic film having two layers of inner and outer layers which does not adhere to each other without human labor is required on a bag making processing line consisting of a tubular molding machine and a welding cutting machine. Not only can the tubular bag be easily formed and mass-produced, but the outer surface of the oily food on the outer surface such as a round burro may come into contact with the transparent inner bag, and stains may appear on the outer surface of the light-colored print of the outer bag. In addition, the light-colored printing portion gives a noticeable and clean feeling to the human eye and can prevent the deterioration of the quality of the packaged food.

[Brief description of drawings]

FIG. 1 is a perspective view showing a double-polymerized palm bag of the present invention.

FIG. 2 is a partial vertical cross-sectional view taken along the line AA of FIG.

FIG. 3 is a side view of a rolled multi-layer plastic fabric in a wound state.

FIG. 4 is a side view of another embodiment of FIG.

FIG. 5 is a plan view of a bag manufacturing state.

FIG. 6 is a perspective view of a double gusset bag.

FIG. 7 is a perspective view of a three-side welded double bag.

FIG. 8 is an exploded perspective view of a conventional double cylindrical bag.

[Explanation of symbols]

 c, d Plastic film e Both side edges 1 Back sticking edge 2 Welding bottom 3 Double cylindrical bag 3'Outer bag 3 "Inner bag 4 Light color printing part

Claims (3)

[Claims] 1. A double tubular bag in which two layers of inner and outer layers of plastic film are laminated without adhering to each other and both side edges are folded back to form a back adhesive edge on the back side and one edge is a welded bottom edge. A double bag in which light-color printing is applied to a part of the outer bag of the tubular bag, the other part is kept transparent, and the inner bag is kept transparent. 2. The double bag according to claim 1, wherein a gusset is formed on both side edges of the double bag instead of the double folded bag. 3. Instead of forming the back sticking edge by welding, the two inner surfaces of the two layers are opposed to each other, and four side edges and one edge are welded.
(1) Double bag described.