JPH0619478Y2 - Product packaging bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a product packaging bag with a header used for packaging relatively small products, and such a product packaging bag with a header has a header portion. It is widely used in retail sales at supermarkets, etc., because it serves as a hanging part during display and also serves as a printing part for advertising of products.

[Prior Art] Nowadays, a plastic film header-equipped product packaging bag occupies most of the product packaging bags and is widely used.

In these bags, since the plastic sheet is also used as the thick sheet that serves as the core material of the header portion, fusion by fusion can be applied to the manufacturing process of the product packaging bag, which is convenient for continuous manufacturing.

However, even if the plastic sheet as the core material of the header portion is thick, it is not sufficient that only a considerably soft header portion can be obtained as compared with the stiffness of the cardboard. The stiffer the header portion, the more it tends to be favored in terms of the function and feel of the header.

Also, there is a cardboard that uses strong stiffness as a core material of the header, but the cardboard has a drawback that it is bent or torn.

[Problems to be Solved by the Invention] An object of the present invention is to provide a product packaging bag having a strong and strong header portion.

[Means for Solving Problems] The inventor of the present invention intends to provide a product packaging bag having a header portion with a strong cardboard core as a core member with a bag structure suitable for manufacturing by a conventional continuous process. As a result of diligent research, the header plastic film is adhered to the cardboard of the header part with a heat-sensitive adhesive to form a three-layer laminate, so that the header part lamination operation by heat treatment that can be easily applied to the continuous bag-making process can be used. And found the present invention.

That is, according to the present invention, in a product packaging bag with a header composed of a header portion 1 and a bag body portion 2, a thin cardboard core 5 is inserted into a fold 4 of a thin header plastic film 3 and the cardboard core 5 The header plastic films 3 are attached to both sides with a heat-sensitive adhesive, and the header plastic films 3 on the front and back are fused to each other along the lower edge of the cardboard core to provide a heat seal portion 6, and the cardboard core 5 The header portion and the header plastic film 3 of the triple-layered body whose width is narrower than the width of the bag body portion 2
Both side edge portions 8 of the two plastic bag films 7 extending continuously and integrally downward from the bottom of the heat seal portion 6 of FIG.
The present invention provides a header-equipped merchandise packaging bag having a bag body portion 2 formed by melting and having an opening 9 on the lower side.

The present invention will be described in more detail with reference to the drawings of the embodiments.

In the embodiment shown in FIG. 1, the upper edge of the cardboard core 5 is arranged along the folds 4 of the header plastic film 3 and the header plastic film 3 is heated by a heat-sensitive adhesive applied to the cardboard core 5 in advance. This is fixed on the entire front and back surfaces of the cardboard core 5 by compressing with.

The heat-sensitive adhesive used in the present invention can be used by being laminated or coated on the cardboard core 5.

The heat-sensitive adhesive used in the present invention is one that melts and exhibits a strong adhesive force when heated, and as the adhesive component, for example, EVA, polyamide, vinyl chloride-acetic acid vinyl copolymer, plachiral can be used. .

In addition, active lasting heat sensitive adhesives such as methacrylic-
A dried mixture of an acrylic acid ester copolymer emulsion and a dispersion of a plasticizer may be used.

These heat-sensitive adhesives can be applied to the surface of the cardboard of the header as an organic solvent solution, emulsion or hot melt type.

When applying or coating the heat-sensitive adhesive of the present invention, a mixture of the heat-sensitive adhesive and a coloring agent such as ink or pigment can be used. In this case, particularly, a background color that allows the print on the header film to be seen, for example, a white color, a yellow color, or the like can be preferably used.

In the present invention, the header plastic film 3 is fused to each other at the heat seal portion 6 along the line along the lower edge of the header paper core 5.

The heat seal portion 6 has a role of wrapping the header core in the conventional product packaging bag for the header portion of the plastic sheet core.

In the present invention, since the header core 5 is entirely adhered to the header plastic film 3, it is not necessary to separate the header portion and the bag body portion, and for the purpose of forming the upper edge of the bag body portion. It is not necessary to provide a heat seal part.

However, when the cardboard core 5 of the present invention is used for the header portion, it is an essential requirement that the fusion heat seal portion 6 be located below the lower edge of the cardboard core 5.

That is, in the continuous manufacturing process of the product packaging bag with the header, the raw material of the cardboard core 5 is a continuous tape, and in order to manufacture the bag body, the cardboard core 5 is machined for each bag body. It is necessary to cut with a blade.

Therefore, when the position of the heat seal portion 6 is above the lower edge of the cardboard core 5, when the cardboard core 5 is cut into each bag body, a hole is formed in the upper portion of the bag body portion 2.

When a thick plastic sheet is used instead of the cardboard core 5, the header core can be cut not by a cutting tool but by fusing with a hot blade. The present invention is significantly different from the present invention in that it can be provided above the lower edge of the header sheet and, for example, three sheets can be heat-sealed simultaneously on the header portion.

In the header-equipped product packaging bag of the present invention, the header portion needs to be smaller than the width of the side edge portions 8 on both sides of the bag body portion 2. In manufacturing the product packaging bag of the present invention, the side edge portion 8 of the bag body portion 2 is formed by fusing a hot blade. Prior to this fusing, it is necessary to cut a continuous sheet of cardboard core. It is also preferable that punching is performed not by simple cutting but by providing a slit having a width into which a hot blade used for fusing is inserted.

Since the width of the header portion is narrower than the width of the bag body portion, a continuous bag-making process of the header-equipped product packaging bag of the present invention can be performed.

Below the heat-sealing portion 6 of this embodiment, a bag plastic film 7 is continuously and integrally extended from the front and back.
Then, the side edge portions 8 on both sides thereof are fusion-bonded to each other to form the bag body portion 2 having the opening portion 9 on the lower side.

In this embodiment, the opening 9 is provided with a release paper attached on an adhesive layer which is a conventional sealing means.

The sealing means of the present invention is not limited to the method of this embodiment, and, for example, fusion sealing can be performed after the insertion of the product.

[Advantage of the Invention] The product packaging bag with a header manufactured according to the present invention is easy to handle because the header is a strong cardboard, and is easy to manufacture even if the core of the header is paper. is there. And since the plastic film is thermocompression bonded to the cardboard coated with the heat-sensitive adhesive, the header plastic film and the paper are not peeled off at the side edge portions on both sides of the header portion and the edge of the hanging hole, As a result, it can be widely used as a water-resistant and durable paper header portion.

Further, the characteristic advantage of the present invention is that since the entire front and back surfaces of the cardboard are adhered by the plastic film, a laminated body having a three-layer structure is formed, which is stronger than the cardboard and has disadvantages of the paper. The drawback of being weak against bending is solved, and the cardboard will not be bent or torn.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a header-equipped product packaging bag according to the present invention, and FIG. 2 is a cross-sectional view thereof, wherein reference numerals 1; header portion, 2; bag body portion, 3; Header plastic film, 4; Header plastic film fold line, 5; Cardboard core, 6; Heat seal part, 7; Bag body film, 8; Bag body side edge part, 9; Opening part, 10; Hanging hole .

Claims (1)

[Scope of utility model registration request] 1. A header-equipped product packaging bag comprising a header portion 1 and a bag body portion 2, wherein a thin cardboard 5 is inserted into a fold 4 of a thin header plastic film 3,
The header plastic film 3 is attached to both sides of the cardboard 5 with a heat-sensitive adhesive, and heat-sealing portions 6 for melting the front and back header plastic films 3 are provided along the lower edge of the cardboard. Paper 5
Of the triple laminated body having a width narrower than the width of the bag body portion 2 and the heat seal portion 6 of the header plastic film 3 extending downward continuously and integrally.
A header-equipped product packaging bag, characterized in that it has a bag body portion (2) having an opening portion (9) formed by melting both side edges (8) of a sheet of plastic film (7).