JPH0625143U - Packaging bag - Google Patents

Abstract

(57) [Summary] [Structure] In a self-supporting packaging bag made of a multi-layer film, a vertical strip, a diagonal strip, a horizontal strip or a combination thereof is partially formed on the outermost layer or the outermost layer and the innermost layer of the film constituting the body part. A self-supporting packaging bag that is ribbed with uneven shapes. [Effect] The body film of the self-supporting packaging bag has rigidity and ribs for giving an anti-slip effect during handling, so that it can be seen in conventional self-supporting packaging bags when the contents are taken out or handled. It is a very excellent self-supporting packaging bag that does not show any significant hip breaking phenomenon and has the effect of preventing slipping from the hand.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a self-supporting packaging bag in which a multi-layered film forming the body portion of the packaging bag is provided with rigidity and a self-sustaining property which is partially formed with an uneven pattern in order to impart an anti-slip effect during its handling. The present invention relates to a packaging bag that has.

[0002]

[Prior art]

 Conventionally provided self-supporting packaging bags are those in which a body film called a doipack and a film forming the bottom are double-folded and sealed in a curved shape (circular shape), or two sheets. Of the bottom film of the body film facing each other, and the bottom film folded is sealed so as to be integrated at an angle so that the bottom surface has an angular shape (for example, JP-A-57-46750). (For example, Japanese Patent Laid-Open Publications), or the one in which the bottom portion is folded into a W shape with a fold angle and the side surfaces are sealed so that the bottom surface is angular (for example, Japanese Patent Laid-Open Publication No. 56-123255, etc.), or those in which the side wall surface of the bag is gusseted to provide self-supporting properties (for example, JP-A-54-8072 and JP-A-60-172656). Various proposals have been made.

Of these, when packing a liquid material as the content to make the material self-supporting, a doipack type or a rectangular bottom is usually used, and the side wall is gusset-folded. Things have been used primarily in combination with paper boxes or have been used primarily in powder form. Looking at the cross-section of these self-supporting packaging bags filled with contents, the bottom becomes circular or angular depending on the weight of the contents and is stable, but the cross-sectional shape is pyramidal, and the front shape is fan-shaped. . However, in these self-supporting packaging bags, the body film that constitutes the bag lacks rigidity, so that the shape of the self-supporting packaging deforms when it is self-supporting, and it is difficult to maintain a constant shape. Furthermore, when the contents are discharged, the body film bends due to the gravity of the contents, making it difficult to adjust the discharge amount, and slipping easily when handling these freestanding bags, especially when carrying them or taking out the contents. There were problems such as.

To solve these problems, the film forming the body is made thick to have rigidity, or a handle-like punched part is provided in a part of the bag to make it easier to hold. However, if the film is simply thickened, it will be difficult to handle it as a bag, and it will become a container rather than a bag, which will cause a cost problem, and the handle-like punched part will not be held. Although it became easier, the anti-slip effect was not obtained. Other than this, there is also proposed a structure in which the shape of the self-supporting packaging bag itself is changed and a squeeze is formed in the body of the bag body to impart self-supporting stability (Japanese Patent Laid-Open No. 62-16345). Even in this proposal, how to hold it by hand is limited, and the problem of discharging the contents still remains.

[0005]

[Problems to be Solved by the Invention]

 It is an object of the present invention to solve the above-mentioned problems and provide a self-supporting packaging bag which is a normal bag body but which imparts rigidity to its body and has an anti-slip effect. It is in.

[0006]

[Means for Solving the Problems]

 The present invention comprises a multi-layered film, which is a self-supporting packaging bag in the form of a film forming a body and a film forming a bottom, or a body film and a bottom film which are integrally formed by folding the bottom into a W shape. Shaped self-supporting packaging bag, or doypack-shaped self-supporting packaging bag, in the outermost layer or the outermost layer and the innermost layer of the multi-layered film that constitutes the body part, a vertical strip or diagonal strip with a partially uneven cross section, It is a self-supporting packaging bag with ribs that is provided with a horizontal strip or a combination of these strips.

Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 (a) shows a model of the structure of the film according to the present invention. The base layer 1 is composed of a polyester film, a polyamide film, an ethylene-vinyl acetate copolymer, cellophane paper, aluminum foil, or other single layer or a multi-layered film in which these layers are combined. Is used. These base materials are appropriately selected from those having the required performance depending on the object to be packaged, and those having desired performance such as heat resistance, gas barrier property and light shielding property are selected.

The thickness of these base material layers is about 10 to 300 μm. A film having a thickness of 20 to 300 μ, such as polyethylene, polypropylene, ionomer, polyamide, polyester, or polycarbonate, is used as the outermost layer 2 on the outer surface of the base material layer, and polyethylene, polypropylene, ionomer, polycarbonate, or the like on the inner surface of the base material layer. A resin layer of polyester or the like having a thickness of 20 to 300 μm is laminated on the innermost layer 3 to form a body film of a self-supporting packaging bag.

A strip is formed on the outermost layer or the outermost layer and the innermost layer of such a multi-layer body film so that the cross section becomes the concave portion 3 and the convex portion 4 by heating / pressurizing by a hot platen, impulse or the like. In order to form such a strip having an uneven cross section, by pressing a heated mold having a convex shape on the outermost layer or the outermost layer and the innermost layer, the concave portion 4 and the resin layer in this portion escape to both sides, The convex portion 5 is formed. Other than the heating / pressurizing method, if unevenness can be formed in the heat-adhesive resin layer, it is also possible to use a means such as ultrasonic waves without depending on the heating / pressurizing method.

The shape of these strips having an uneven portion in the cross section is the rib 6 for imparting rigidity to the self-supporting packaging bag and for giving an anti-slip effect. In order to effectively bring out the effect of the rib 6, Normally, it is formed in the vertical direction (vertical stripe), but even if it is a combination of the oblique direction (diagonal stripe) and the vertical direction in order to further enhance the rib effect, the rib effect is further required in the horizontal direction. In this case, the ribs may be provided in the lateral direction (horizontal stripe) without any problem, and a combination of these may be used. The direction in which the ribs are provided in this way is appropriately selected according to the purpose. Further, the depth of the rib 6 is preferably within the thickness range of the outermost layer 2 and the innermost layer 3, but the rib may be formed over the base material layer 1 within a range that does not impair the required performance as a packaging bag. It is possible. Similarly, the shape, number, etc. of the ribs 6 are appropriately selected to suit the purpose.

As shown in FIG. 2, the film having the ribs 6 formed as described above is used as a body film 7, and the body film is configured such that the innermost layers 3 face each other. The bottom film 8 forming the bottom surface is arranged at the bottom of the film 7, and as shown in FIG. 3 (a), the bottom surface is formed by sealing 9 on both sides, the bottom portion, and the bottom film and the body film at an angle. Forming a self-supporting packaging bag having a square shape.

The film forming the bottom portion may have the same structure as the film forming the body portion, or may have a different structure as long as it can be sealed in a packaging bag shape.

FIG. 3B shows a conceptual diagram of a cross section taken along the line AA in FIG. 2 and 3, the bottom surface has a square shape, but the present invention can be applied to any shape having a self-supporting shape, such as a doypack shape or a gusset fold. Any shape can be used.

The shape shown in FIGS. 2 and 3 is an example related to the present invention. For example, as shown in FIG. 4, the outermost layer 2 may have a diagonal cross shape. Attaching ribs is effective in preventing slippage.

Further, in the self-supporting packaging bag of the present invention, it is possible to form a notch 10 for opening in the top part to facilitate opening, and also to use a fastener-shaped one in the opening part to be a reclose type. There is no problem and the cap can be attached. However, it is important that the rib of the present invention does not hang on the opening line 11 from which the opening notch 10 is to be opened.

[0016]

【Example】

 In the self-supporting packaging bag having the shape shown in FIG. 4, a multi-layer film in which a polypropylene film having a thickness of 100 μ is formed as an outermost layer and a polyethylene layer having a thickness of 50 μm is formed as an innermost layer is used as a base material film layer on a 50 μm polyamide film. A rib with a depth of 75μ and a width of 2mm from the outermost polypropylene layer side is heated and pressed by a hot platen to form a cross on one side, and then the periphery is sealed so that the bottom becomes angular and the internal volume is increased. About 350 ml of self-supporting packaging bag was obtained. When used, it does not slip even if it is held in the hand, and when the contents are taken out by opening it from the opening notch at the top, the body film has rigidity even when the contents are low, so it does not bend It could be used as if removing the contents from a rigid bottle.

[0017]

[Effect of device]

 According to the present invention, the body film of the self-supporting packaging bag is provided with ribs for imparting rigidity, so that when the contents are taken out or when the contents are handled, the waist breaking phenomenon as seen in the conventional self-supporting packaging bag is caused. It was a very self-supporting packaging bag that was not seen at all and was easy to handle without slipping during use. The self-supporting packaging bag of the present invention is not limited to liquid contents, but powdered contents, or mixed contents of liquid and solid contents can also give similar excellent results. Furthermore, the ribs of the present invention are very easy to form, and can be easily incorporated into a bag manufacturing line.

[Brief description of drawings]

FIG. 1 is a conceptual cross-sectional view of a multilayer film according to the present invention, in which (a) is a cross-sectional view showing a state before forming a rib 6,
(B) is a schematic cross-sectional view after the rib 6 is formed.

FIG. 2 is an exploded view of the self-supporting packaging bag having an angular bottom according to an example of the present invention.

FIG. 3 is a front view (a) showing ribs formed on the inner surface of the bag of the self-supporting packaging bag whose bottom portion in FIG. 2 is square.
3B is a cross-sectional view taken along the line AA in FIG. 3A, and FIG. 3C is a schematic cross-sectional view taken along the line BB.

FIG. 4 is a perspective view showing another example of the present invention.

Claims (1)

[Scope of utility model registration request] 1. A self-supporting packaging bag made of a multilayer film, wherein the outermost layer or the outermost layer and the innermost layer of the multilayer film constituting the body part are partially formed with vertical stripes, diagonal stripes, horizontal stripes or a combination thereof. A self-supporting packaging bag that is made into ribs by giving unevenness.