JP3038088U - Grain bag - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a bag for grains with air vent holes, which is easy to manufacture and can be mass-produced, prevents the generation of mold during storage of grains, and also has an antibacterial action. A resin film formed by mixing a mildew-proofing agent or an antibacterial agent into resin or nylon resin,
Grain bag shaped like a bag with air vent holes.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a grain bag that can be stored for a long period of time without producing mold on grains such as rice.

[0002]

[Prior art]

 Generally, bags made of polyolefin resin such as polyethylene or nylon resin are used in bags for grains such as rice. Since these resin films have no air permeability, air vent holes are usually provided to vent air during filling. Recently, there has been a problem that molds are produced on grains such as rice around the air vent holes while the grains are filled and stored in such grain bags.

Up to now, in a sterilization packaging bag, a filter tape having air permeability and bacteria blocking property is brought into contact with a ventilation notch provided in a package made of a non-air permeable film. However, the structure of the structure complicates the manufacturing method and is not suitable for mass production. Until now, there has never been a bag for grains with air vent holes that has antifungal and antibacterial effects suitable for mass production.

[0004]

[Problems to be solved by the device]

 In view of the above points, the present invention provides a bag for air-bleeding grains, which is easy to manufacture, can be mass-produced, prevents the growth of mold during storage of grains, and has an antibacterial action.

[0005]

[Means for Solving the Problems]

 That is, the present invention is a grain bag in which a resin film formed by blending a mildew-proofing agent or an antibacterial agent with a polyolefin resin or nylon resin is formed into a bag shape having an air vent hole.

[0006]

[Embodiment of the invention]

 The resin used in the grain bag of the present invention may be any of the polyolefin resins such as polyethylene and polypropylene that have been generally used so far, or nylon resins such as nylon 6 and nylon 66. Before forming into a film, an appropriate amount of antifungal agent or antibacterial agent is mixed with these resins in advance.

The antifungal agent or antibacterial agent used in the present invention may be any one as long as it can be blended with a resin to form a film, but at least at the melting temperature of the resin during film formation. It needs to be stable. Examples of such a fungicide or antibacterial agent include various commercially available prebentol, thiabendazole, metallic silver, metallic silver ceramics antibacterial agents, metal ion-containing inorganic antibacterial / antifungal agents and the like. These antifungal agents and antibacterial agents may be used alone or in combination of two or more kinds. Further, in order to improve mixing and dispersion with the resin, a fungicide or an antibacterial agent may be supported on silica gel, calcium phosphate or other inorganic simple substance.

The amount of the antifungal agent or the antibacterial agent is 0.1 to 5 parts by weight, preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the resin. If it is less than 0.1 part by weight, sufficient antifungal and antibacterial action cannot be obtained, and if it is more than 5 parts by weight, the mechanical strength of the film decreases. The antifungal agent or the antibacterial agent can be compounded with the resin at the same time as the compounding of the dispersant and other resin additives by using a drum blender, a screw blender, a static blender or the like. It is also possible to use a master batch in which 10 to 30% of a fungicide or an antibacterial agent is previously mixed with the resin, and the mixture is melt-kneaded by an extruder and extruded into pellets.

Molding of a resin containing a fungicide or an antibacterial agent into a film can be carried out by manufacturing a hollow tubular film by an inflation molding machine which has been conventionally used or by manufacturing a flat film by extrusion molding. It is possible to form these films into grain bags with air vent holes by using a commonly used heat sealer and a continuous bag making machine with a cutter, and forming air vent holes with a needle or punch. . The air vent holes are smaller than the grain size of the grain to be filled, and usually a plurality of diameters of about 0.1 to 3 mm are formed on the front surface and the back surface of the bag.

An example of the grain bag of the present invention is shown in FIG. In the figure, 1 is a bag body formed by blending an antibacterial agent with polyethylene resin and molding it with an inflation molding machine. 2 indicates a heat-sealed portion forming the bottom of the bag. Numeral 3 is a circular air vent hole for venting air when filling the grain. FIG. 2 is a view showing a state in which the grain bag of the present invention is filled with rice.

[0011]

【Example】

 Example A commercially available metal silver ceramics antibacterial agent 2% and magnesium stearate 0.5% as a dispersant were mixed in a polyethylene blend with a drum blender, and then a hollow tubular film was produced by an inflation molding machine. A hollow tubular polyethylene film with this antibacterial agent kneaded was formed into a bag using a continuous bag-making machine, and a total of 20 circular air vent holes with a diameter of 1 mm were made on the front and back of the bag by a punching machine. Produced rice bags. This rice bag was filled with polished rice and left for 1 month in a humid kitchen, but no rice mold was found in the polished rice around the air vent hole.

Comparative Example For comparison, using only polyethylene resin pellets containing no antibacterial agent or dispersant, a hollow tube-shaped film was produced by an inflation molding machine, and a continuous bag-making machine and a punching machine were used. A rice bag with a vent hole was manufactured. When this rice bag was filled with polished rice and arranged in the same place as the rice cleaning bag of the example and left for one month, mold was observed in the polished rice around the air vent hole.

[0013]

[Effect of the invention]

 The grain bag with air vents of the present invention can be mass-produced using a conventional film forming machine or bag making machine, and is blended with the polyolefin resin or nylon resin forming the grain bag and kneaded. The use of a fungicide or antibacterial agent that is uniformly dispersed in the bag body prevents the entry of fungi and fungi through the air vent holes, and the fungicidal and antibacterial effects over a wide area on the inner and outer surfaces of the bag It is possible to effectively prevent the development of mold on the grains during long-term storage.

[Brief description of the drawings]

FIG. 1 is a perspective view of a grain bag.

FIG. 2 is a perspective view of a grain bag after filling with grains and heat sealing.

[Explanation of symbols]

 1 ... Bag body 2 ... Heat seal bottom 3 ... Air vent 4 ... Opening 5 ... Heat seal after grain filling

Claims (1)

[Utility model registration claims] 1. A resin film formed by blending a fungicide or an antibacterial agent with a polyolefin resin or a nylon resin,
Grain bag shaped like a bag with air vent holes.