JPH0880950A - Bag for heavy goods - Google Patents

Abstract

PURPOSE: To provide a packaging bag for heavy article wherein a sufficient strength is provided, a content can be confirmed, and a printing of characters and pictures is easy to see by using a resin layer wherein a transparent part and opaque part are arranged into a band form, and a co-extruded multi-layer film with a resin layer on one surface or both surfaces. CONSTITUTION: A transparent or opaque resin raw material is fed to a plurality of extruders, a synthetic resin film, wherein a coloring layer 2 for which an opaque part 22 and transparent part 21 are arranged into a band form, and a transparent layer 3 is laminated on one surface or both surfaces of the coloring layer 2, is continuously produced by an inflation extrusion-molding method or T die extrusion-molding method. Then, the synthetic resin film is formed into a tubular shape, and a part which becomes a bottom part of a bag is heat-sealed in the vertical direction to the coloring direction of the coloring layer 2. In addition, a part which becomes a mouth is cut to manufacture a packaging bag 1 for heavy article. Also, when the inflation extrusion-molding method is used, the film can be obtained under a tubular shape, and the production process can be simplified, and a stable strength can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-strength heavy-weight packaging bag suitable for storing heavy items such as rice, fertilizer, cement, and garden soil.

[0002]

2. Description of the Related Art Conventional heavy-duty packaging bags have been made of various types of opaque bags that have been vapor-deposited with aluminum or colored to give various impressions in order to give a high-grade feeling. However, the contents of such a heavy-duty packaging bag cannot be directly seen, so that consumers have selected products by only relying on the product name and the place of origin.

On the other hand, a bag for heavy goods, in which a character or a pattern is printed on a transparent or translucent bag, is also used in part, but since the contents can be seen through, the characters or the pattern printed on the surface of the bag are There was a problem that it was hard to see and lacked in luxury. A window-opening bag for heavy-weight packaging, in which a part of the bag remains transparent and the other part is solidly printed, has also been proposed, but the manufacturing process is complicated and the cost is high. Sufficient concealing property could not be obtained only by doing, and it had the same problem as a transparent or translucent bag.

[0004]

The problem to be solved by the present invention is that it has sufficient strength, the contents can be easily confirmed from the outside of the bag, and the printing of characters and patterns is easy to see and impairs the sense of quality. Is to provide a bag for heavy goods packaging.

[0005]

In order to solve the above-mentioned problems, in a heavy-weight packaging bag having a transparent portion where the contents can be confirmed, the bag has a transparent portion and an opaque portion arranged in strips. And a resin layer, and a coextruded multilayer film having a transparent resin layer on one side or both sides thereof, and a bag for heavy goods packaging, wherein the coextruded multilayer film is a tubular film. The present invention also provides the heavy-duty packaging bag, and further provides the use of the heavy-duty packaging bag as a rice bag.

That is, a transparent portion for viewing the contents,
A resin layer (hereinafter, referred to as a color arrangement layer) in which an opaque portion is arranged in a strip shape for making characters and patterns more clearly stand out and giving a high-class feeling is formed on the transparent portion and the opaque portion of the color arrangement layer. It is possible to solve the above problems by forming a bag having a portion where contents can be confirmed (hereinafter referred to as a contents confirmation portion) using a film in which a transparent layer for preventing the strength of a seam from being laminated is laminated. I found it.

The transparent portion and the transparent layer in the present invention mean a portion having transparency to the extent that the contents can be confirmed, and the opaque portion means the extent to which it is difficult to confirm the internal important matter. Means an opaque portion. For example, when the content is light enough to be easily seen even if it is colored, it is a transparent portion or a transparent layer.

The present invention will be described below with reference to the drawings.
The heavy-weight packaging bag 1 of the present invention is, for example, first supplied with transparent or opaque resin raw materials to a plurality of extruders and then subjected to an inflation extrusion molding method or a T-die extrusion molding method to form an opaque portion 22 and a transparent portion 21. A synthetic resin film in which a color-arrangement layer 2 arranged in a strip shape and a transparent layer 3 are laminated on one side or both sides thereof is continuously produced. Next, this is made into a tube shape, and the part which becomes the bottom part of the bag is heat-sealed in the direction perpendicular to the color arrangement direction of the color arrangement layer 2, and further the part which becomes the mouth part is cut to manufacture. When the inflation extrusion molding method is used, the production process is simplified because the film is obtained in a tubular shape, and there is no need for heat sealing to make the film into a tubular shape, and stable strength can be obtained. Particularly preferred.

The color ratio of the transparent portion 21 and the opaque portion 22 is
It is preferable that the opaque portion 22 is as wide as possible and the transparent portion 21 is at least the size necessary for confirming the contents in order to make the printing of characters and patterns stand out more clearly and to give a high-class feeling. Regarding the position of the contents confirmation section A having the transparent portion 21 in the cross section, it is preferable to avoid the central portion where printing is crowded as much as possible. For example, as shown in FIG. Of these, if necessary, it is preferable to provide them in 1 to 4 locations in the vertical direction, and the remaining portion is an opaque portion B having an opaque portion 22 in its cross section.

As a raw material for forming the transparent portion and the transparent layer of the heavy-duty packaging bag of the present invention, the same materials as the conventional heavy-duty packaging bags such as polyolefin resins represented by low-density polyethylene are used. . Further, as the raw material forming the opaque portion in the color arrangement layer, those obtained by adding pigments such as titanium oxide, aluminum powder, and yellow lead to the above resin are exemplified, especially considering that printing is performed as secondary processing,
It is preferable to use light-colored raw materials.

[0011]

The function and effect of the bag for packaging heavy goods according to the present invention allows the contents to be seen from the outside, so that the consumer can actually see the contents and select a product. In addition, since most of the bags are colored with excellent concealing properties like conventional high-grade heavy-duty packaging bags, it is possible to print aesthetically pleasing characters and pictures on the bags, which impairs the sense of quality. Absent. Furthermore, since the transparent layer is provided on one side or both sides of the color arrangement layer, the strength of the joint between the transparent portion and the opaque portion does not decrease.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a bag for packaging heavy goods according to the present invention.

FIG. 2 shows an embodiment of a bag for packaging heavy goods according to the present invention (FIG.
It is a sectional view in dd 'of -b).

[Brief description of reference numerals] 1 bag for heavy goods 2 color layer 21 transparent part 22 opaque part 3 transparent layer A content confirmation part B opaque part

Claims (3)

[Claims] 1. A heavy-duty packaging bag having a transparent portion capable of confirming the contents, wherein the bag has a resin layer in which a transparent portion and an opaque portion are arranged in a strip shape, and a transparent layer on one side or both sides thereof. A bag for packaging heavy goods, comprising a coextruded multilayer film having a resin layer. 2. The bag for packaging heavy goods according to claim 1, wherein the coextruded multilayer film is a tubular film. 3. Use of the heavy-weight packaging bag according to claim 1 or 2 as a rice bag.