JP2598471Y2 - Packaging bag with bent part using corrosion resistant barrier packaging material - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag using a barrier packaging material used for detergents, cosmetics, industrial chemicals, and the like. have a crooked portion using a corrosion resistant barrier packaging material having a corrosiveness
It relates to a packaging bag to be used.

[0002]

2. Description of the Related Art Conventionally, as a constituent material of a flexible packaging material used for a packaging bag, an aluminum foil excellent in light-shielding property and non-breathability has been used for protecting contents. As shown in FIG. 2, the packaging materials used for packaging bags for detergents, cosmetics, industrial chemicals, and the like also include base films (21, outside the package) such as polypropylene films, polyester films, and nylon films. 7) to 15μ
In general, a flexible packaging material (20) in which an aluminum foil (22) and a polyolefin film (23, inside of a package) are laminated in order has been used.

[0003]

However, when the above-mentioned flexible packaging material of [outside] base film / aluminum foil / polyolefin film [inside] is used, a polyolefin film such as a fragrance or a cationic surfactant is used. In the case of contents containing a component which easily penetrates, for example, a chemical rag (wet tissue), floor wax, etc., the aluminum foil of the intermediate layer may be corroded by the component penetrating the inner polyolefin film. In particular, in a form in which a fold is formed in the packaging bag by the bent portion , for example, as shown in FIG. 3, the fold (32) of the other bent portion of the three-way seal (a), the side surface of the gusset seal (b) a fold by the bent portion of the (3
2), folding of the bottom of self-supporting flexible packaging material (c)
The aluminum foil is folded by a fold (32) caused by a bent portion and a fold (33) generated when the contents are filled (d), or folded by external force during transportation.
When bending occurs due to bending or the like, the aluminum foil of the intermediate layer is often corroded by a component that has penetrated, and the part cannot often maintain its original state. In the case of using aluminum foil, the contents could not be seen through. This invention uses a laminated material not used in the aluminum foil constituting material, the contents of the permeate composition broken with corrosion resistance <br/> barrier packaging material having a corrosion resistance to bending unit Is provided.

[0004]

According to the present invention, as shown in FIG. 1, a thermoplastic resin film having a thin film of an inorganic compound formed on at least one surface thereof on a single-layer or multi-layer substrate film (11). corrosion resistant barrier packaging material, characterized in that 12) and a penetration resistance of heat-sealable thermoplastic resin film (13) laminated through an adhesive layer (14, 15)
It is a packaging bag having a bent portion using (10) .

[0005] Even without least the above and formed a thin film of an inorganic compound on one side, either one of the inner surface or the outer surface of the packaging material shown in FIG. 1 of the thermoplastic resin film or the inorganic compound on both surfaces It is a thin film formed.

[0006] The term "laminated with an adhesive layer interposed therebetween" means that the layer is laminated with an adhesive by a dry lamination method or a wet lamination method, or is laminated with a molten polyolefin or the like by an extrusion lamination method.

[0007] A permeation-resistant heat-sealable thermoplastic resin film is one which has permeation resistance to the permeable component of the contents and is heat-fusible.

[0008]

The heat-sealing film provided inside the packaging material of the packaging bag of the present invention is made of a thermoplastic resin such as polyester or polyacrylonitrile, which hardly allows the components of the contents to pass therethrough, and is resistant to penetration. Since the film is a water-soluble film, the permeation of the components of the contents is extremely smaller than that of a conventional polyolefin-based heat-sealing film, and the amount of the permeated components of the contents reaching the barrier layer of the intermediate layer is suppressed. Therefore, delamination (delamination) is prevented.

The barrier layer provided in the middle of the packaging material of the packaging bag of the present invention is a film in which a thin film of an inorganic compound is formed on at least one side, and uses a metal such as an aluminum foil like a conventional barrier layer. Since it is an inorganic compound, it is not corroded by the components of the permeated contents. In addition, a thin film of an inorganic compound rarely causes pinholes and cracks due to breakage, and there is no risk of morphological destruction due to corrosion caused by pinholes and cracks caused by breakage of conventional aluminum foil.

[0010] Further, some films formed by forming a thin film of an inorganic compound on a transparent thermoplastic resin are transparent.
It is possible to obtain a transparent packaging bag in which the contents can be seen from the outside of the packaging bag , which is impossible with a packaging material using a conventional aluminum foil for the barrier layer.

[0011]

EXAMPLES As the base film of the packaging material of the present invention,
12μm or 16μm polyester film, 15μm
A single-layer or multi-layer film such as a nylon film having a thickness of 20 m, a regenerated cellulose film having a thickness of 22 μm, and a biaxially stretched polypropylene film having a thickness of 20 μm can be used. In this embodiment, a biaxially stretched polypropylene film having a thickness of 20 μm was used. On this substrate film, a silicon compound is
A polyester film having a thickness of 0 ° and having a thickness of 12 μm and deposited by a vacuum deposition method was laminated so as to adhere the non-deposited surface by a dry lamination method using a urethane-based adhesive. In addition, the inorganic compound vapor-deposited film used for the packaging material of the present invention uses silicon oxide (Si _x O _y x) as the inorganic compound.
= 1 or 2 y = 0-3) or magnesium oxide (Mg
O) or the like, by vacuum evaporation, sputtering, ion plating, or the like, and the evaporation surface may be one side or both sides, and the thickness of the evaporation is at least 500 °, preferably 800 ° to 1200 °. It is. Furthermore, a 40 μm polyester film is used as a heat-sealable film having low adsorption on the vapor-deposited surface of the produced laminated film, and is adhered by a urethane-based adhesive by a dry lamination method. Materials were made. As the heat-sealing film having low adsorption, a polyacrylonitrile film, an ethylene-vinyl acetate copolymer resin film, or the like may be used in addition to the polyester film.

Next, the produced biaxially stretched polypropylene fiber
Film (20μm) / polyester film (12μm
) / Silicon compound deposited film (deposited thickness 800Å) /
A bag is formed using a corrosion-resistant barrier packaging material having a polyester film (40 μm) structure, and FIG.
Self-supporting flexible packaging bag (150 ^mm × 23
0 ^mm ). To evaluate this packaging bag , put 80 pieces of chemical rag ( 130 ^mm x 200 ^mm ) into
Make a bag, pack it in cardboard, mix it in a truck
After transporting 00 km, the bag was stored at a temperature of 23 ° C. and a relative humidity of 60% for 180 days, and the state of each bag was confirmed. As a result, no abnormalities such as corrosion due to the contents of the barrier layer and delamination peeling between layers of the constituent material did not occur.

[0013]

[Effect of the invention] Using the corrosion-resistant barrier packaging material of the invention.
The following effects can be obtained by using a packaging bag having a bent portion . The barrier layer provided in the middle of the packaging material of the present invention is a film in which a thin film of an inorganic compound is formed on at least one side, and is made of an inorganic compound without using a metal such as an aluminum foil like a conventional barrier layer. Therefore, it is not corroded by the components of the permeated contents. Since the inner heat-sealable film uses a thermoplastic resin with excellent low adsorptivity such as polyester or polyacrylonitrile, corrosion of the barrier layer by permeation components from contents such as fragrances and surfactants and There is little risk of accidents such as delamination between constituent material layers. Be bent portion can by form-fill type, less that pinholes or cracks are generated in the barrier layer as in the conventional aluminum foil, and corroded by the contents component having passed through the heat-sealable film packaging Form
Is not destroyed. Unlike the aluminum foil used for the conventional barrier layer, the inorganic compound vapor-deposited film used in the present invention can be made transparent, so that a packaging material in which the contents are visible can be made.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the constituent layers of the corrosion-resistant barrier packaging material of the present invention.

FIG. 2 is a cross-sectional view showing constituent layers of a conventional barrier packaging material.

FIG. 3 is an explanatory view showing bending of a packaging bag generated by various types of bag making including the bag making type used in the embodiment of the present invention.

[Explanation of symbols]

10 ... ... resistance corrosion barrier packaging material 11, 21 ...... base film 12 ...... silicon compounds deposited film 13 ...... low absorptive heat-sealable film 14,15,24,25 ...... adhesive layer 20 ...... conventional Barrier packaging material 22: Aluminum foil 23: Polyolefin heat sealable film 31: Heat seal 32: Crease 33: Crease generated by filling

Continuing from the front page Judge Shunji Ogishima Judge Minoru Kina Judge Koji Amemiya (56) References JP-A-3-213335 (JP, A) JP-A-5-50550 (JP, A) JP-A 5- 31855 (JP, A) Actually open 61-125427 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A thermoplastic resin film having a thin film of an inorganic compound formed on at least one surface thereof on a single-layer or multi-layer substrate film and a heat-sealing thermoplastic resin film having resistance to penetration through an adhesive layer. packaging having a crooked portion using a corrosion resistant barrier packaging material, characterized in that laminated
Bag .