JP3069083U - Packaging bag - Google Patents

Abstract

(57) [Summary] (With correction) [Problem] To sufficiently and easily deaerate the inside of the bag,
Prevent moisture or pests from entering the bag. A mountain fold or a bottom edge of a double-sided film base material (10) or a cylindrical film base (13) having both end edges (one end edge) or both end edges sealed. Sealing is performed after securing a ventilation path 12 that communicates with the outside air by interposing a breathable sheet material 11 that is folded in a valley or a Z-shaped cross section.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to improvement of a packaging bag.

[0002]

[Prior art]

 Resin packaging bags containing cereals, for example, rice grains, are required to prevent collapse due to stacking during the transportation stage, etc., so that pin holes with a diameter of about 1 mm to 2 mm are punched at multiple locations on both sides of the bags. The air inside the bag is evacuated.

[0003]

[Problems to be solved by the invention]

 However, according to conventional pinhole packaging bags, the pinholes are pierced on the sides of the bags, and when rice grains are stacked, the top and bottom of the bags will block the pinholes. Could not be degassed. Also, when storing rice grains, pests such as elephant worms enter the bag from the pinholes and eat the rice grains, or water enters from the pinholes to generate mold and the like, which significantly lowers the product value. ing.

An object of the present invention is to sufficiently and easily deaerate the inside of a bag, and to prevent foreign matter, moisture, pests and the like from entering the inside of the bag.

[0005]

[Means for Solving the Problems]

 The packaging bag of the present invention that solves the above-mentioned problem has a breathable sheet material with a mountain fold, a valley fold, or a Z-shaped cross-section interposed at both edges or all edges of one edge of the two-piece base film. In addition, a ventilation path for communicating with the outside air is secured at a plurality of places at the both end edges or at one end edge, and both end edges and a bottom edge portion are sealed. A breathable sheet material with a mountain fold, a valley fold, or a Z-shaped cross section is interposed at the bottom edge of the laminated base film or the tubular base film, and communicates with the outside air at a plurality of locations on the bottom edge. The feature is that the bottom edge is sealed while the ventilation path is secured.

[0006]

[Embodiment of the invention]

 The substrate film used in the present invention is preferably a synthetic resin film. Such films include stretched polypropylene, unstretched polypropylene, vinylidene chloride coated polypropylene, high density polyethylene, low density polyethylene, polystyrene, polyethylene terephthalate, nylon, and vinylidene chloride coated nylon. It is also possible to use a synthetic resin laminate film obtained by laminating one or two or more of non-axially stretched polypropylene, non-axially stretched linear lowden polyethylene, or ethylene vinyl acetate copolymer resin on these synthetic resin films. It is. Further, a nonwoven fabric or a vapor-deposited film for cosmetics can be attached to the base film.

The packaging bag according to the present invention is manufactured, for example, as follows. First, one base film is cut in half to form a two-piece base film, and a breathable sheet material, for example, a non-woven fabric is applied to both edges or one entire edge between the two films. Hold the film and glue the film and non-woven fabric together. At this time, the nonwoven fabric used is a mountain fold, a valley fold, or a Z-shaped cross section. In this state, only the front and back films are connected via the nonwoven fabric, and the entire broken line portion of the nonwoven fabric is not sealed at all. Next, if the above-mentioned end edges or one end edge are sealed with a mold hot plate in which a hole serving as an air passage is formed in advance, only the hole is left unsealed as an air passage communicating with the outside air. Finally, if the bottom edge is sealed, the packaging bag of the present invention is obtained.

In the case where a double-layered base film or a tubular film having both end edges sealed is used as the film base material, the above-mentioned step is performed at a portion to be a bottom edge portion. You can get a packaging bag.

[0009]

Hereinafter, an embodiment of a packaging bag according to the present invention will be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention. A nonwoven cloth 11 having a valley-folded central portion in the longitudinal direction is sandwiched between both end edges of the two-layered film substrates 10 and 10 or a whole edge of one end edge, and a plurality of air passages 12 communicating with the outside air. Is secured and sealed. The air passages 12 are formed at equal intervals in this embodiment, but may be formed at random. Further, the planar shape of the air passage 12 may be any shape as long as it has a structure that can communicate with the outside air, and is not limited to the shape of the present embodiment. Then, the bottom edges of the film bases 10 and 10 are sealed to form a packaging bag according to the present invention. Although the nonwoven fabric 11 is a valley-folded one in this embodiment, it is not shown, but may be a mountain-folded one or a Z-folded one in cross section.

When the packaging bag is packed with, for example, rice grains and sealed at the upper edge to be piled up during the distribution process, the air vent 12 formed at the edge of the packaging bag releases air from the bag. Is carried out satisfactorily and easily without being affected by rice bags stacked one above the other. Further, since the mouth of the ventilation passage 12 is closed by the nonwoven fabric 11, the nonwoven fabric 11 prevents pests, foreign substances or moisture from entering the bag.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, both edges of the two-layered film bases 10 and 10 are sealed in advance, and other configurations, functions and effects are provided except that a ventilation path 12 is formed at the bottom edge. According to the first embodiment.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, the other configuration, operation and effect are the same as those of the first embodiment, except that a cylindrical film 13 is used and the ventilation path 12 is formed at the bottom edge thereof.

In each of the above embodiments, the nonwoven fabric 11 has been described as an example of the air-permeable sheet material. However, the air-permeable sheet material is not limited to this, and for example, Japanese paper or the like having a break strength may be used. is there. In addition, rice cereal has been described as an example of packing in this packaging bag, but the present invention is not limited to this, and it is only necessary to vent the bag.

[0014]

[Effect of the invention]

 As described above, the packaging bag of the present invention can be used for the two-sided film base material at both ends (one end) or at the bottom edge of the two-layered film base material or the tubular film base material having both end edges sealed. The air permeable sheet material with mountain fold, valley fold, or Z-shaped cross section is interposed in the part, and after securing a ventilation path that communicates with the outside air, it is sealed. This makes it easier to prevent pests, foreign matter or moisture from entering the bag.

[Brief description of the drawings]

FIG. 1 is a partial front view showing a first embodiment of a packaging bag according to the present invention.

FIG. 2 is a schematic sectional view taken along line AA in FIG.

FIG. 3 shows a second embodiment of the packaging bag according to the present invention.
FIG.

FIG. 4 shows a third embodiment of the packaging bag according to the present invention.
FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Double-layered film base material 11 Nonwoven fabric 12 Air passage 13 Cylindrical film base material

Claims (3)

[Utility model registration claims] An air-permeable sheet material having a mountain fold, a valley fold, or a Z-shaped cross section is interposed at all of the both end edges or one end edge of the two-layered base film, and the both end edges or one end are provided. A packaging bag, characterized in that both sides and a bottom edge are sealed while securing ventilation paths for communicating with the outside air at a plurality of edges. 2. A breathable sheet material having a mountain fold, a valley fold, or a Z-shaped cross section is interposed at the bottom edge of a two-piece base film or a tubular base film having both end edges sealed. A packaging bag having a bottom edge sealed with a ventilation path communicating with the outside air at a plurality of locations on the bottom edge. 3. The packaging bag according to claim 1, wherein the breathable sheet material is a nonwoven fabric or Japanese paper having a break strength.