JP2525227Y2 - Rice bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION Field of the Invention The present invention relates to a rice bag having load-carrying prevention properties and air permeability.

2. Description of the Related Art As a packaging material used for rice bags, a base film provided with a heat-sealing resin layer on the inner surface side is widely used. As the base film, a polyester film (biaxially oriented polyethylene terephthalate film), a biaxially oriented polypropylene film, a biaxially oriented polyamide film, or the like is used. From the viewpoint of aesthetics and insect repellency, a film provided with a metal deposition layer may be used.

Rice bags are required to have some air permeability,
A small hole may be provided at an appropriate location, or a non-heat-sealing location may be provided at a part of the peripheral heat-sealed portion to impart air permeability.

Problems to be solved by the invention Rice bags filled with rice are handled in multiple layers in each process, such as loading and unloading with a forklift, transportation by truck, storage in the distribution process, display at stores, etc. It is.

At that time, load collapse may occur, but load collapse prevention often depends on the experience of workers, such as devising the stacked state, and it seems that load collapse prevention is not performed by improving the packaging material. It is.

However, making the stacking state into a pyramid shape, for example, reduces the number of stacking, and is not preferable in terms of work efficiency.

Also, regarding the air permeability, the number of small holes and non-heat-sealed parts is naturally limited in consideration of the strength and sealing strength of the packaging material. .

The present invention has been made in view of such a situation, and has as its object to provide a rice bag that is unlikely to collapse and that can maintain air permeability.

Means for Solving the Problems The rice bag of the present invention has a film material comprising a base film (11) in which a half surface (A surface) of the bag is provided with a heat-fusible resin layer (12) on the inner surface side of the bag. 1), wherein the other half surface (B surface) of the bag is made of a nonwoven fabric (2) by a spun bond method.

In this case, a water-permeable film (3) can be further disposed on the inner surface side of the nonwoven fabric (2) constituting the side B of the bag.

 Hereinafter, the present invention will be described in detail.

Film material (1) The film material (1) comprises a base film (11) provided with a heat-fusible resin layer (12), and the inner surface side of the bag becomes the heat-fusible resin layer (12). .

As the base film (11), a polyester film, a polypropylene film, a polyamide film or the like is used, and it is preferable that the base film is biaxially stretched from the viewpoint of strength. A multilayer film or a film provided with a metal deposition layer can also be used.

Examples of the heat-fusible resin layer (12) include copolymers of low-density polyethylene and ethylene with comonomers such as vinyl acetate, propylene, unsaturated carboxylic acid, unsaturated carboxylate, and unsaturated carboxylic acid ester. And various resin layers having heat fusibility.

Printing on the film material (1) may be performed from the outer surface side of the base film (11) or from the inner surface side (the side facing the heat-fusible resin layer (12)).

Nonwoven fabric (2) As the nonwoven fabric (2), a nonwoven fabric by a spun bond method is used for the purpose of the present invention. The spunbonded nonwoven fabric is obtained by stretching a yarn (span) spun from an extruder and bonding it immediately to form a sheet. Since the continuous long fibers are used as the fibrous material, the strength is higher than that of a normal nonwoven fabric made from short fibers. As the bonding method, any of a fixing method using heat, a fixing method using a binder, and a fixing method using needling are adopted. As the raw material resin, polyamide, polyester, polyolefin, acrylic, or the like is used.

If the thickness of the nonwoven fabric (2) is insufficient,
It can also be used by stacking.

In the nonwoven fabric (2) formed by the spunbond method, the core-sheath composite fiber (21) having a high melting point resin (2a) as a core component and a heat-fusible resin (2b) as a sheath component, and It is particularly preferable that the sheath component of the composite fiber (21) is joined only at the thermocompression bonding portion (22) by embossing thermocompression bonding. The core-sheath structure includes both a concentric core-sheath structure and an eccentric core-sheath structure. Here, as the high melting point resin (2a) constituting the core component, polyamide,
Among resins such as polyester, polyolefin and acrylic, those having a relatively high melting point (for example, 130 ° C. or more, particularly 150 ° C. or more) are mentioned. As the heat-fusible resin (2b) constituting the sheath component, And polyamides, polyesters, polyolefins and the like having a relatively low melting point or softening point (for example, those having a melting point of less than 130 ° C., especially less than 120 ° C.).

Structure of the Bag The rice bag of the present invention is configured such that the half surface (A surface) of the bag is the above-described film material (1) and the other half surface (B surface) of the bag is the nonwoven fabric (2) by the above-described spun bond method. . Bag making is
Usually, this is performed by a heat sealing method.

On the inner surface side of the nonwoven fabric (2) constituting the side B of the bag, a water-resistant film (3) can be further disposed. Examples of the water-resistant film (3) include a polyolefin film, a polyester film, a polyamide film,
Examples thereof include a polyurethane film, and it is desirable that the film has heat sealing properties in terms of bag making. The nonwoven fabric (2) and the water-permeable film (3) may be integrated, or may simply overlap. If the water-permeable film (3) is arranged on the inner surface side of the nonwoven fabric (2), the air permeability of the bag is impaired. Therefore, it is necessary to take measures such as providing small holes in the water-permeable film (3). .

Function and Effect of the Invention As described above, the rice bag of the present invention has a half surface (A side) made of a film material (1) and the other half surface (B side) made of a nonwoven fabric (2) by a spun bond method. Have been. Since both have high strength, they can sufficiently withstand filling of rice of about 1 to 10 kg or more.

The film material (1) that constitutes one half of the bag has a product name,
Necessary printings such as production area, net weight, milling date, price, name of certification institution, certificate of certification, name of manufacturer and distributor, barcode, etc. can be performed.

In the rice bag of the present invention, since the B side of the bag is formed of the nonwoven fabric (2), even if the rice bags filled with rice are stacked in multiple stages, the collapse of the load does not easily occur. Therefore, in each process such as loading and unloading with a forklift, transportation by truck or the like, storage in a distribution process, display at a store, etc., efficiency is improved and space can be effectively used. This is the first feature of the present invention.

In addition, since the half surface of the bag is made of the nonwoven fabric (2), the bag has fine gaps, and can have necessary air permeability while having insect repellency and preventing rice grains from leaking. As described above, the second feature of the present invention is that it has not only the above-mentioned function of preventing the collapse of the load but also the function of ensuring the air permeability.

The fact that the half surface of the bag is made of the nonwoven fabric (2) means that cushioning properties are added. Therefore, the bag of the present invention is also advantageous in reducing the number of bag breakage accidents during handling. This is the third feature of the present invention.

A rice bag in which half of the bag is made of non-woven fabric is extremely unique in design. The fact that such rice bags are piled up at the store is far beyond the conventional wisdom and strongly attracts the interest of customers.

EXAMPLES Next, the present invention will be further described with reference to examples.

Embodiment 1 FIG. 1 is a perspective view showing an example of the rice bag of the present invention, and a part of the rice bag is cut away.

2 and 3 are an enlarged plan view and an enlarged end view schematically showing the nonwoven fabric (2) constituting one half of the rice bag of FIG. 1, respectively.

FIG. 4 is a perspective view schematically showing a heat fusion state at a crossing point of fibers in a thermocompression bonding portion (22) of the nonwoven fabric (2).

(1) is a film material. In this embodiment, a biaxially stretched nylon 6 having a thickness of 15 μm as an example of a base film (11) on which white printing for opacity and necessary printing have been performed in advance. On the printing surface side of the film, a low-density polyethylene film having a thickness of 60 μm as an example of the heat-fusible resin layer (12) is laminated by a dry lamination method.

(2) is a nonwoven fabric formed by a spunbond method, and has a core-sheath composite fiber (polyester as a high melting point resin (2a) as a core component and polyethylene as a heat-fusible resin (2b) as a sheath component). 21), and has a configuration in which the sheath components of the composite fiber (21) are joined to each other only in the thermocompression bonded portion (22) by embossed thermocompression bonding. The emboss is formed by using an emboss roll having 16 short rod-shaped protrusions of approximately 0.5 mm × 5 mm per cm ² .

The film material (1) and the nonwoven fabric (2) are made by heat sealing, and the overall size of the bag is 470 mm in length and 300 mm in width.

(4) is a heat seal portion, which is set to a width of 10 mm.

The rice bag having the above configuration was filled with 5 kg of milled rice, the opening was heat-sealed, and subjected to a slip test with the nonwoven fabric (2) face down. The slip angle was 28 when the contact surface was nylon 6 film. ° and 26 ° when the contact surface was a polyester film.

The slip test was carried out by placing a rice bag containing milled rice on a plate on which a nylon 6 film or a polyester film was laminated, and gradually lifting one end of the plate to measure the angle at which the rice bag began to slide.

Also, in actual handling, the rice bags containing the polished rice of Example 1 did not collapse even if they were stacked in multiple stages, and the collapse prevention property was significantly improved as compared with conventional products.

Comparative Example 1 A slip test similar to the above was performed on both surfaces except that a rice bag made using the film material (1) of Example 1 was used. 19 ° when the contact surface is a polyester film
It was only 13 °.

Embodiment 2 FIG. 5 is a sectional view showing another example of the rice bag of the present invention.

(1) is a film material. In this embodiment, a heat-fused polyester film having a thickness of 12 μm as an example of a base film (11) on which white printing and necessary printing have been performed is applied. It has a configuration in which a 55 μm-thick ethylene-vinyl acetate copolymer film as an example of the adhesive resin layer (12) is laminated by a dry lamination method.

(2) is a nonwoven fabric formed by the same spun bond method as in Example 1.

(3) is a thickness of 25 μm as an example of a water-resistant film
And a large number of small holes (31) having a diameter of 1 mm.

(4) is a heat-sealed portion, in which only the periphery of the film material (1), the water-permeable film (3) and the nonwoven fabric (2) is heat-sealed to a width of 10 mm.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the rice bag of the present invention,
Some parts are cut out. 2 and 3 are an enlarged plan view and an enlarged end view schematically showing the nonwoven fabric (2) constituting one half of the rice bag of FIG. 1, respectively. FIG. 4 is a perspective view schematically showing a heat fusion state at a crossing point of fibers in a thermocompression bonding portion (22) of the nonwoven fabric (2). FIG. 5 is a sectional view showing another example of the rice bag of the present invention. (1) ... film material, (11) ... base film,
(12) ... heat-fusible resin layer, (2) ... non-woven fabric by spun bond method, (2a) ... high melting point resin, (2b) ... heat-fusible resin, (21) ... composite fiber , (22) ... thermocompression bonded part, (3) ... water-permeable film, (31) ... small hole,
(4) ... heat seal part

Claims (3)

(57) [Scope of request for utility model registration] 1. A half surface (A side) of a bag is made of a film material (1) comprising a base film (11) provided with a heat-fusible resin layer (12) on the inner surface side of the bag. The other half (B
(1) a rice bag characterized by comprising a nonwoven fabric (2) by a spunbond method. 2. A non-woven fabric (2) comprising a high melting point resin (2) as a core component.
a) a composite fiber (21) formed of a core-sheath composite fiber (21) in which a heat-sealable resin (2b) is disposed in a sheath component, and only in the thermocompression bonded part (22) by embossed thermocompression bonding;
2. The rice bag according to claim 1, wherein the sheath component of 1) has a configuration in which the sheath components are joined to each other. 3. The rice bag according to claim 1, wherein a water-permeable film (3) is further disposed on the inner surface side of the nonwoven fabric (2) constituting the side B of the bag.