JP2000272633A - Baggy container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a baggy container in which a packaging material capable of being carried out for a metallic inspection even after the contents are filled into it, a released opening port of it is heat sealed and it can be completely ignited or reproduced after its use is applied and further the contents can be enclosed after its opening of the seal. SOLUTION: There is provided a baggy container in which the end surfaces of the two packaging materials are thermally melted and attached to each other to form the container, wherein an inlet port of the baggy container is provided with an openable or closable engaging means, at least one of the two packaging materials is a laminated product having a laminar configuration in which a heat-sealing resin adhering layer (Ia) is laminated at one surface of a fine porous resin extension film base layer (I) with a degree of opaque (JIS P-8138) being more than 80% and a gas-barrier resin film layer (II) having a non-organic oxide thin film layer (III) is laminated at the other surface, resulting in that a moisture permeability of the laminated substance (JIS Z-0208) is 5 g/m2.24 hr or less and an oxygen permeability (JIS Z-1707) is 5 cc/m2.24 hr.atm or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to tea, coffee beans,
The present invention relates to a bag-like container suitable for packaging powders such as bath salts, medicines, agricultural chemicals, fertilizers, candy (candy) and the like, and liquids such as mirin, liquor and fruit juice.

[0002]

2. Description of the Related Art Tea, coffee beans, bath additives, pharmaceuticals, pesticides,
Packaging of powders such as fertilizers and candy (candy) and liquids such as mirin, liquor and fruit juice is generally required to have a function of preventing the transmission of water vapor, oxygen and visible light. In order to meet this demand, (1) generally, an aluminum foil is provided on the back surface of the wax-coated printing paper, and a heat-sealing resin layer such as an ethylene / acrylic acid copolymer or an ethylene / vinyl acetate copolymer is provided on the back surface. Opaque packaging material consisting of laminated laminates, (2) biaxially oriented polyethylene terephthalate film / polyethylene film adhesive layer /
An opaque packaging material composed of a laminate of an aluminum foil / biaxially oriented polypropylene film / polyethylene heat sealable film is used in a carton box or a flexible packaging bag.

[0003] In general, the above-mentioned powder packaging bag is filled with tea, coffee beans, and medicine contents into the bag, inspected for foreign matter of metal powder in the contents, and then packed. Is heat-sealed and shipped or stored. However, inspection during opening gives the opportunity for dust and foreign matter to enter the bag.Therefore, it is necessary to provide a packaging material that can be inspected for metal powder contamination after filling and heat sealing the opening. Desired by the market. Further, the conventional packaging material has a disadvantage that after burning, the aluminum foil remains as burning waste, and the treatment requires time and effort. Further, once the packaging material is opened, there is a disadvantage that the contents cannot be sealed and cannot be stored for a long period of time.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve these problems of the prior art. That is, the present invention uses a packaging material capable of metal inspection even after filling the contents and heat sealing the opening, and which can be completely burned or regenerated after use, and further opened. An object to be solved is to provide a bag-like container capable of enclosing the contents later.

[0005]

As a result of diligent studies to solve these problems, the present inventors have developed a occlusal means that can be opened and closed at the entrance using a packaging material having a specific configuration and physical properties. The present inventors have found that the intended purpose can be effectively achieved by forming a bag-shaped container having the same, and have provided the present invention.

That is, according to the first invention of the present invention, in a bag-shaped container formed by heat-welding the end surfaces of two packaging materials, an openable and closable means is provided at an entrance of the bag-shaped container. Is provided, at least one of the two packaging materials,
A heat-sealing resin adhesive layer (Ia) is laminated on one surface of a microporous resin stretched film base layer (I) having an opacity (JIS P-8138) of 80% or more, and an inorganic oxide thin film is formed on the other surface. A laminate having a layer structure obtained by laminating a gas barrier resin film layer (II) provided with a layer (III), wherein the laminate has a moisture permeability (JIS Z-020).
8) is 5 g / m ² · 24 hr or less and the oxygen permeability (JI
S Z-1707) is 5cc / m ² · 24hr · atm
A bag-like container characterized by the following.

[0007] A second invention of the present invention is a bag-shaped container formed by heat-welding the end faces of two packaging materials, wherein an opening and closing occlusal means is provided at the entrance of the bag-shaped container. At least one of the two packaging materials has an inorganic oxide thin film layer (II) on a microporous resin stretched film base layer (I) having an opacity (JIS P-8138) of 80% or more.
A gas barrier resin film layer (II) provided with I) is laminated, and a heat sealable resin adhesive layer (I) is further formed thereon.
V), wherein the laminate has a moisture permeability (JIS Z-0208) of 5 g / m ^2.
・ Oxygen permeability (JIS Z-170) at 24 hours or less
7) is a bag-like container characterized in that it is 5 cc / m ² · 24 hr · atm or less.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the structure, materials and embodiments of the bag-like container of the present invention will be described in detail. The bag-like container of the present invention is formed in a bag-like shape by heat-welding the end faces of two sheets. Therefore, before describing the bag-shaped container, first, the sheet-shaped packaging material constituting the bag-shaped container will be described in detail. In addition,
The packaging material described below may be applied to at least one of the two sheets of the bag-like container.

Structure of Packaging Material The structure of the packaging material is a heat-sealing resin adhesive layer (Ia) /
Opacity of 80% or more includes a microporous resin stretched film base layer (I) / a gas barrier resin film layer (II) provided with an inorganic oxide thin film layer (III), or an opacity of 80% It includes a gas-barrier resin film layer (II) provided with the above-mentioned microporous resin stretched film base layer (I) / inorganic oxide thin film layer (III) / heat-sealing resin adhesive layer (IV). Specifically, it is a laminate as exemplified in the enlarged cross-sectional views of the packaging material in FIGS. 1 and 3. "Inorganic oxide thin film layer (II
Gas barrier resin film layer provided with I) (II) "
Usually has a structure in which a thin film layer (III) of an inorganic oxide is laminated on a gas barrier resin film layer (II), and any surface thereof is on the side of the microporous resin stretched film base layer (I) side. It may be formed.

The laminate has a moisture permeability (JIS Z-020).
8) is 5 g / m ² · 24 hr or less, and oxygen permeability (J
IS Z-1707) is 5cc / m ² · 24hr · at
It shows physical properties of m or less. Due to having these characteristics, by processing, for example, FIGS.
The present invention can be used as a bag for green tea, which is a bag-like container of the present invention as shown in FIG. FIG. 1 is an enlarged cross-sectional view of one embodiment of a packaging material, and FIG. 2 is a perspective view of a green tea bag obtained by processing the same. FIG. 3 is an enlarged cross-sectional view of one embodiment of the packaging material, and FIG. 4 is a perspective view of a green tea bag obtained by processing the same. In the figure, I is a microporous resin stretched film base layer, Ia is a heat sealable resin adhesive layer, Ib is an optional adhesive layer, II is a gas barrier resin film layer, III is an inorganic oxide thin film layer, and IV is The heat-sealable resin layer, P, is printed. The printing P, if necessary, may be performed on any of the microporous resin stretched film base layer (I), the gas barrier resin film layer (II), and the inorganic oxide thin film layer (III). For example, as shown in FIG. 1, printing may be performed on the surface of the gas barrier resin film layer (II) on the side of the microporous resin stretched film base layer (I), or as shown in FIG. 3. The non-laminated surface of the stretched film base layer (I) may be printed. In FIG. 3, the print P may be provided on the surface of the gas barrier resin film layer (II) in contact with the heat-sealing resin adhesive layer (IV).

Layer Structure of Laminate (1) Base Layer of Stretched Microporous Resin Film (I) The stretched microporous resin film (I) imparts stiffness to the wrapping material and makes it opaque, thereby enabling identification of printing. It has the function of making it easier and lowering the light transmittance. Opacity (JIS-P8138) is 80
% Or more, and more preferably 85 to 100%. As the microporous resin stretched film, for example, the following three films can be exemplified.

As the first stretched microporous resin film,
A biaxially stretched film of a thermoplastic resin having microporosity containing an inorganic or organic filler in a proportion of 8 to 65% by weight can be mentioned (Japanese Patent Publication No. 54-31032, US Pat. No. 3,775,521). No., U.S. Pat. No. 4,1
No. 91,719, U.S. Pat. No. 4,377,616.
No., U.S. Pat. No. 4,560,614).

As a second microporous resin stretched film,
A uniaxial or biaxially stretched thermoplastic film containing 0 to 40% by weight of a white inorganic fine powder as a core layer, and a uniaxial thermoplastic resin containing 10 to 65% by weight of a white inorganic fine powder on both surfaces or one surface of the core layer. Synthetic paper provided with a stretched film as a paper-like layer can be mentioned (Japanese Patent Publication No. 46-40 / 1976)
794, JP-A-57-149363, JP-A-57-181829, etc.).

This synthetic paper has a three-layer structure in which a paper-like layer of a uniaxially stretched film is present on the front and back surfaces of the core layer even if it has a two-layer structure (Japanese Patent Publication No. 46-40794, US Pat.
18950), three to seven layers of synthetic paper having another resin film layer between the paper-like layer and the core layer (Japanese Patent Publication No. 50-29738, Japanese Patent Application Laid-Open No. 57-14936).
No. 3, JP-A-56-126155 and JP-A-5-126155.
No. 7-181829, U.S. Pat. No. 4,472,22
No. 7). Also, on the back surface of these synthetic papers, metal salts of propylene / ethylene copolymer and ethylene / (meth) acrylic acid copolymer (Na, Li, Zn,
K), three or more synthetic paper sheets provided with a heat seal layer (Ia) made of a resin having a lower melting point than the resin of the base layer (I) such as chlorinated polyethylene, ethylene / vinyl acetate copolymer, etc. (Japanese Patent Publication No. 3-13973).

A particularly preferred microporous resin stretched film base layer (I) is a uniaxially stretched or biaxially stretched thermoplastic resin film containing 0 to 40% by weight of a white inorganic fine powder and / or an organic filler. As a core layer (A), a uniaxially stretched thermoplastic resin film containing 0 to 65% by weight of a white inorganic fine powder and / or an organic filler is provided on both sides of the core layer.
This is a laminated stretched film provided as B ′). As a method for producing such a synthetic paper having a three-layer structure, for example, a thermoplastic resin film containing 0 to 40% by weight, preferably 8 to 25% by weight of an inorganic fine powder and / or an organic filler is used. The film is unidirectionally stretched at a temperature lower than the melting point, and the inorganic fine powder and / or the organic filler is coated on both sides of the obtained uniaxially stretched film in an amount of 0 to 65% by weight, preferably 3 to 65% by weight.
A method of laminating a molten film of a thermoplastic resin containing 10% to 65% by weight, more preferably 10 to 65% by weight, and then stretching the laminated film in a direction perpendicular to the above direction can be mentioned. The synthetic paper produced by this method is a film in which a paper-like layer is uniaxially oriented and has many fine voids, and the core layer is a biaxially oriented laminated structure.

As a third stretched microporous resin film,
On the paper-like layer side of the second stretched microporous resin film, there can be mentioned a synthetic paper further provided with a transparent thermoplastic resin laminate layer having a thickness of 0.1 to 20 μm containing no inorganic fine powder. (JP-B-4-60437, JP-B-1-60411, JP-A-61-3748,
U.S. Pat. No. 4,663,216). High gloss printing can be performed on this synthetic paper.

More specifically, a multilayer having a front layer and a back layer made of a uniaxially stretched film of a thermoplastic resin containing 8 to 65% by weight of an inorganic fine powder is used as a core layer with a biaxially stretched film of a thermoplastic resin as a core layer. Synthetic paper comprising a film as a support, a transparent film layer of a thermoplastic resin containing no inorganic fine powder provided on the surface layer side of the support, and further provided with a primer coating layer having an antistatic function (Japanese Patent Application Laid-Open No. -374
No. 8) or a uniaxially stretched thermoplastic resin film in which a biaxially stretched thermoplastic resin film is used as a core layer and at least one surface of the core layer contains an inorganic fine powder in a ratio of 8 to 65% by weight. Paper comprising a laminate of a paper-like layer made of a thermoplastic resin film and a surface layer made of a uniaxially stretched thermoplastic resin film, wherein the thickness (t) of the surface layer is present in the paper-like layer. Assuming that the average particle size of the inorganic fine powder to be formed is (R), a synthetic paper (Japanese Patent Publication No. 1-60411) made of a multilayer resin film characterized by satisfying the following formula (2) is exemplified. Can be.

R ≧ t ≧ 0.1 × R (2) This multi-layered synthetic paper also has a heat-sealable resin layer (Ia) provided on the back surface like the second microporous resin stretched film. May be used.

These stretched microporous resin films are microporous synthetic papers made of a stretched resin film having fine voids inside the film. Its opacity (JIS
P-8138) is preferably 80% or more, more preferably 85% or more, and the thickness is preferably 30 to 300 µm, more preferably 50 to 150 µm. The porosity calculated by the following equation (1) is preferably 10 to 60%,
More preferably, it is 15 to 45%. In equation (1), ρ0 represents the true density of the support, and ρ1 is the density of the support (JIS).
P-8118), but the true density is almost equal to the density before stretching, unless the material before stretching contains a large amount of air.

[0019]

(Equation 3) ρ ₀ : true density of resin film ρ ₁ : density of resin film

As the thermoplastic resin used as the material of the synthetic paper,
Polyolefin resins, for example, high-density polyethylene, polypropylene, poly (4-methyl-1-pentene), polyamide, polyethylene terephthalate, polybutylene terephthalate, and mixtures thereof can be exemplified. Among them, polypropylene and high-density polyethylene are preferable from the viewpoint of water resistance and chemical resistance. When polypropylene is used for the core layer, a thermoplastic resin having a melting point lower than that of polypropylene such as polyethylene, polystyrene, or ethylene-vinyl acetate copolymer is blended in an amount of 3 to 25% by weight in order to improve stretchability. preferable.

As the inorganic fine powder, for example, calcium carbonate, calcined clay, silica, diatomaceous earth, talc, titanium oxide, barium sulfate and the like can be used. The particle size is preferably from 0.03 to 7 μm. As the organic filler, it is preferable to select a filler made of a resin different from the thermoplastic resin as the main component. For example, when the thermoplastic resin film is a polyolefin resin film, polyethylene terephthalate, polybutylene terephthalate, polycarbonate as an organic filler,
Nylon-6, nylon-6,6, nylon-6, T,
It is possible to use a polymer such as a cyclic olefin, polystyrene, or polymethacrylate having a melting point (for example, 170 to 300 ° C.) or a glass transition temperature (for example, 170 to 280 ° C.) higher than that of the polyolefin resin. it can. Stretch ratio is 4 ~ in both longitudinal and transverse directions
The stretching temperature is preferably from 130 to 162 when the resin is a propylene homopolymer (melting point: 164 to 167 ° C).
The temperature is preferably 110 to 120 ° C for high-density polyethylene (melting point 123 to 134 ° C), and 104 to 120 ° C for polyethylene terephthalate (melting point 246 to 252 ° C). The stretching speed is 50 to 350 m /
Minutes is preferred. The thickness of the microporous resin stretched film base layer (I) is preferably 30 to 300 μm, more preferably 40 to 100 μm.

(2) Heat-sealable resin adhesive layer (I
a), (IV) The heat-sealable resin adhesive layer is formed so as to be melt-bonded by heating when the packaging material is subjected to secondary processing into a bag or a carton box. A heat-sensitive adhesive resin is used for the heat-sealing resin adhesive layer. Examples of the heat-sensitive adhesive resin include ethylene / acrylic acid copolymer, ethylene / vinyl acetate copolymer, low-density polyethylene, metal salt of ethylene / (meth) acrylic acid copolymer (so-called Surlyn), chlorinated polyethylene, Examples thereof include those having a melting point of 60 to 135 ° C. such as chlorinated polypropylene.

These may be produced by laminating the heat-sealable resin film layer (Ia) simultaneously with the production of the microporous resin stretched film (I) as described above,
The heat-sealing resin (Ia) may be extrusion-laminated on the back surface of the stretched microporous resin film (I). Further, a resin solution obtained by dissolving or dispersing these heat-sealable resins (Ia) in an organic solvent such as toluene, xylene, or tetralin is applied to the back surface of the microporous resin stretched film (I), followed by drying. You may. In addition, in the case of contributing gloss to the surface of the packaging material or using the packaging material for a carton box, it is preferable to provide a heat sealing resin layer (IV) on the surface of the inorganic oxide thin film layer (III). The thickness of the heat-sealable resin adhesive layers (Ia) and (IV) is preferably 1 to 50 μm, more preferably 2 to 4 μm.
0 μm.

(3) Gas barrier resin film layer (I
I) The gas barrier resin film layer is formed to greatly reduce the permeability of water vapor, oxygen, and the like, and uses a gas barrier resin. As the gas barrier resin, polyethylene terephthalate, polyethylene-
Moisture permeability (JIS Z-) of saturated polyesters such as 2,6-naphthalate, polyamides such as nylon 6, nylon 12, and nylon 6,6, aromatic polycarbonates, polyvinylidene chloride, ethylene-vinyl alcohol copolymers, etc.
0208) is 100 g / m ² · 24 hr or less, preferably 50 g / m ² · 24 hr or less, and the oxygen permeability (JIS
Z-1707) is 300cc / m ² · 24hr · atm
Or less, preferably 200 cc / m ² · 24 hr · atm
Use the following: The gas barrier resin film layer may or may not be stretched. Also,
The thickness of the gas barrier resin film layer (II) is preferably 6 to 40 μm, more preferably 8 to 20 μm.

(4) Inorganic Oxide Thin Film (III) In order to further improve the gas barrier properties of the packaging material, an inorganic oxide thin film (III) is formed on the surface of the gas barrier resin film layer (II). The inorganic oxide thin film includes amorphous Al ₂ O ₃ , SiO _x , SnO _x , ZnO _x , IrO _x
(X is a number of 1 to 2) or the like can be used. Among these inorganic oxides, amorphous Al ₂ O ₃ and SiO _x are preferable in terms of transparency and workability, and SiO _x is preferable in terms of gas barrier properties. The thickness of these thin films is restricted by transparency, deposition rate, gas barrier property, film winding property, etc., and is preferably 5 to 600 nm, more preferably 20 to 600 nm.
５００500 nm. When the thickness is less than 5 nm, the gas barrier property becomes insufficient, and when the thickness is more than 600 nm, transparency is deteriorated, and the inorganic oxide thin film itself tends to crack or peel. The light transmittance of the inorganic oxide thin film is 7
Those which are transparent at 5% or more are preferred.

As a vapor deposition method for forming an inorganic oxide thin film, an inorganic oxide is vapor-deposited under vacuum (1 × 10 ⁻⁶ to 1 × 10 ⁻³ Torr) in a high-frequency induction heating type vapor deposition machine. (See JP-B-53-12953 and JP-A-62-101428), or a gas flow containing an organic silicon compound, oxygen and an inert gas which has been evacuated in advance and evaporated in a vacuum deposition apparatus under vacuum. A method in which plasma is generated by discharge to deposit SiO _x on a molded article in the vapor deposition machine (Japanese Patent Application Laid-Open No. 64-87772).
U.S. Pat. No. 4,557,946 and U.S. Pat. No. 4,599,678). Thin film formation methods are classified as ion plating, high frequency plasma CVD, electron beam (EB) evaporation, and sputtering in Industrial Materials, Vol. 38, No. 14, pages 104 to 105, published in November 1990. The principle is introduced.

The determination of the crystallinity or the amorphousness of the aluminum oxide can be easily measured by a usual X-ray diffractometer using Cu Kα ray. For example, when crystalline α-Al ₂ O ₃ is contained, the diffraction angle 2θ is 43.39 degrees or 57.56.
A clear diffraction peak appears at a position such as a degree. β-Al ₂ O ₃
In the case of, a position diffraction peak such as a diffraction angle 2θ of 66.65 degrees or 33.43 degrees appears. The crystal particle size can also be measured from the half width of these diffraction peaks. In addition, unique diffraction peaks can be similarly measured for other crystalline aluminum such as γ-Al ₂ O ₃ and δ-Al ₂ O ₃ . In the case of amorphous aluminum oxide, a specific diffraction peak is not measured by an X-ray diffractometer. The non-crystalline aluminum oxide referred to here is one in which specific diffraction is not observed by X-ray diffraction.

(5) Adhesive layer Depending on the type of the gas barrier resin film layer (II), the film layer (II) and the inorganic oxide thin film (III)
In some cases, the adhesiveness with the adhesive is insufficient. In such a case, a primer (adhesive) can be applied between the gas barrier resin film layer (II) and the inorganic oxide thin film (III). Examples of such a primer include polyester polyol / polyisocyanate and polyether polyol / polyisocyanate of a polyurethane-based primer. The coating amount of the primer is generally 0.5 to 5 g / m ² (solid content).

The base layer (I) and the inorganic oxide thin film layer (I
Gas barrier resin film layer having II) (II)
In order to facilitate the bonding process, the inorganic oxide thin film layer (III) may be covered with a heat-sealable resin adhesive layer (Ib) as shown in FIG. As the polyurethane primer used at this time, for example, EL-150 (trade name) or BLS-2080A and B of Toyo Morton Co., Ltd.
A mixture of LS-2080B can be exemplified. Also, as a polyester primer, the company's AD-5
03 (product name). These primers are applied so that the basis weight is usually 0.5 to 25 g / m ² .

When a transparent plastic film is formed on the inorganic oxide thin film, various transparent plastic films are laminated or a transparent plastic coating film is formed. For the formation of transparent plastic films, vinyl chloride resins such as polyethylene and ethylene copolymers, polypropylene and propylene copolymers, ethylene-vinyl acetate copolymers, ionomers, polyvinyl chloride and their copolymers And vinylidene chloride-based resins such as vinylidene chloride-vinyl chloride copolymer, polyester resins such as polyethylene terephthalate, and the like.

Lamination (adhesion) of microporous resin stretched film base layer (I) and gas barrier resin film (II)
Is used when producing the microporous resin stretched film (I),
The gas barrier resin film may be co-extruded with the filler-containing resin film and stretched to simultaneously produce a laminate of the microporous resin stretched film (I) and the gas barrier resin film (II). The two may be adhered using the primer (Ib).

(6) Other Layers The packaging material is the above-mentioned stretched microporous resin film (I), heat-sealable resin film (Ia) (IV), gas barrier resin film (II), inorganic oxide thin film (II
In addition to I) and the primer layer (Ib), a woven fabric, a nonwoven fabric, a light shielding layer, a pulp paper, a foamed resin layer in order to contribute to the improvement of rigidity, tear resistance and light opacity of the packaging material. Between the heat-sealing resin adhesive layer (Ia) and the microporous resin stretched film base layer (I), and between the gas barrier resin film layer (II) and the microporous resin stretched film base layer (I). It may be provided.

The woven fabric used for imparting the tear resistance, the sewing property, the heat curl resistance and the light impermeability to the packaging material is 4
0 to 150 denier, preferably 50 to 100 denier warp yarn and weft yarn, each 2.54 cm 50 to 50
The basis weight woven by the plain weave method of crossing every other one at a ratio of 140, preferably 60 to 100 is 50 to 200 g / m
² , preferably 50-200 g / m ² plain woven fabric (Ponzi) (JP-A-7-52298, 7-2).
27941).

As a material of warp and weft of plain woven fabric,
Nylon 6, nylon 6,6, polyethylene terephthalate, cotton, rayon, polyacrylonitrile, polyfluoroethylene, polypropylene, polyvinylidene fluoride and the like can be used. The diameters of the warp and the weft are each 40 to 150 denier. The diameters may be the same or different, but the same diameter is more preferable in terms of smoothness. Also, 2.54cm per width for reinforcement,
Thicker yarns may be used for warp yarns and / or weft yarns in a ratio of 1 to 2 yarns.

The nonwoven fabric has a basis weight of 12 to 80 g / m ² obtained by heating and pressing a nonwoven fabric in which short fibers are entangled.
A non-woven fabric sheet, or a thermoplastic resin powder is sprayed on the non-woven fabric and / or a thermoplastic resin sheet is laminated,
Next, this was heated and pressed and integrated, and the basis weight was 60 to 200 g.
/ M ² of a fiber reinforced nonwoven fabric sheet (Japanese Patent Publication No.
74180).

A method for producing a fiber reinforced sheet obtained by heating and pressurizing a nonwoven fabric in which short fibers are entangled is disclosed in
-4993, JP-A-53-10704, JP-A-53-90404, JP-A-53-119305, JP-A-53-122803, and JP-A-56-15500.
JP-A-57-29700, JP-A-57-3929
No. 9, No. 59-70600, No. 57-617
No. 96, 57-139597 and the like.

Usually, this nonwoven fabric sheet is made of polyethylene,
A short or long net or circular net made of a paper material in which short fibers (fiber thickness: 0.2 to 15 denier, fiber length: 1 to 20 mm) of thermoplastic resin such as polypropylene, polyamide and polyester are dispersed in water. After making paper using a paper machine,
It can be produced by applying a pressure of 5 to 200 kg / cm ² at 120 to 270 ° C. to a papermaking paper by a roll and a press. Such a sheet is sold by Teijin Limited under the trade name of Spunbond #Unicell (RT type, B type, BT type).

At the time of this papermaking, pulp-like particles may be blended in the aqueous dispersion at a ratio of 10 to 90% by weight. Examples of the raw material of the pulp-like particles include aromatic polyamide, aromatic polyester, and the like. Further, a polyvinyl alcohol fibrous binder or a thermoplastic resin powder such as polyethylene, polyester, polyamide or polypropylene may be blended as a short fiber binder in an amount of 5 to 30% by weight. Further, a pigment, a plasticizer, a tackifier, a dispersant and the like may be blended.

Further, a non-woven fabric sheet may be produced by spraying thermoplastic resin powder and / or laminating a thermoplastic resin sheet on the non-woven fabric obtained by the papermaking method, and then heating and press-integrating them. . The thermoplastic resin used as the material of the powder and sheet includes polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, styrene-butadiene-acrylonitrile copolymer, polyamide, copolymerized polyamide, polycarbonate, polyacetal, and polymethyl meta. Acrylate, polysulfone, polyphenylene oxide, polyester, copolymerized polyester, polybutylene sulfide,
Examples include polyetheretherketone, polyethersulfone, polyetherimide, polyamideimide, polyimide, polyurethane, polyetherester, polyetheramide, and polyesteramide, and these can be used in combination of two or more.

Further, a non-woven fabric sheet is disclosed in JP-B-48-32.
No. 986, a web of nonwoven synthetic paper obtained by the process described in US Pat. No. 986, comprising at least 75% by weight of filaments of randomly arranged crystalline and oriented synthetic organic polymer of denier for fibers. A web self-bonded at a number of spatially spaced intersections by exposing the filament to a heating fluid that is insoluble in the filament and continuing to restrain it under light compressive force; A nonwoven synthetic paper made by removing the binding force only after the temperature of the web has been lowered to a temperature sufficient to prevent shrinkage of the filaments thereafter may be used. Such nonwoven synthetic paper is sold by DuPont in the United States under the trade name "Tyvek".

In order to use the packaging material in a carton box,
The layers used for imparting rigidity and foldability to the packaging material include a carton paper having a thickness of 80 to 700 μm, a white cardboard, a foamed resin extruded sheet having an expansion ratio of 1.5 to 5 times, and inorganic fine powder of 25 to 55 times. Wt.% Of a thermoplastic resin film (JP-A-5-245962, JP-A-6-91795).
No.). The above-mentioned primer and heat-sealing resin are used for bonding these optional layers.

The bag-like container of the present invention is formed by preparing two sheets of the above-described packaging material and heat-welding the end faces of the two packaging materials as shown in FIGS. The end face to be adhered here is not particularly limited as long as a bag-like container can be manufactured from two sheet-like packaging materials. The packaging material used for the bag-shaped container of the present invention has a moisture permeability (JIS Z-020).
8) is 5 g / m ² · 24 hr or less, preferably 2 g / m ²
・ 24 hr or less, more preferably 1 g / m ²・ 24 hr
And the oxygen permeability (JIS Z-1707) is 5
cc / m ² · 24 hr · atm or less, preferably ² cc
/ M ² · 24 hr · atm or less, more preferably 1 cc
/ M ² · 24 hr · atm. By satisfying these conditions, it is possible to prevent deterioration of the contents and deterioration of the contents. Furthermore, in order to use for packaging of contents that do not like the incidence of light, such as coffee beans, high-grade green tea, true tea, fruit juice, shochu, etc., the total light transmittance of the packaging material (JIS K-710)
5) needs to be 0%.

When the thickness of each layer is thin and the light shielding property is insufficient, the back surface of the microporous resin stretched film (I) is
Forming a shielding layer by performing black solid printing with a thickness of 1 to 5 μm by offset or gravure printing,
In a primer layer for bonding the microporous resin stretched film base layer (I) and the gas barrier resin film layer (II), a large amount of white filler such as titanium oxide whiskers and titanium oxide fine particles (5 to 75% by weight) ) To form a shielding layer by a method such as applying the primer adhesive at ² to 10 g / m ^2, so that the total light transmittance of the packaging material is 0%.

The thickness of the packaging material is 80
３５０350 μm, preferably 80 to 150 μm to provide flexibility, and 350 to 1,
000 μm to give shape retention.

Openable / closable occlusal means An openable / closable occlusal means 14 is formed at the entrance 12 of the bag-shaped container 10 of the present invention. The mode of the occlusal means that can be formed in the bag-shaped container of the present invention is not particularly limited as long as it can be opened and closed and can maintain a closed state. Hereinafter, specific modes of the openable and closable occlusal means will be described with reference to FIGS.

The occlusal means 14 shown in FIG. 5 has a male engaging portion 18 comprising one protrusion 17 on one of the packaging materials 1a.
Is formed, and a female engaging portion 20 composed of two projecting portions 17 is formed on the other packaging material 1b side. Each of the projections 17 has a rectangular cross section in which a flat engagement surface 21 is formed on both sides. Two protrusions 1 in female engaging portion 20
7 are arranged with a distance such that the male engaging portion 20 can just enter.

The occlusal means 14 shown in FIG.
The male engaging portion 18 enters between the projecting portions 17 of the female engaging portion 20 by sequentially pressing both sides of the a and 16b from the end of the packaging material, and the male engaging portion 18 engages with the projecting portion 17 of the male engaging portion 18. The surface 21 corresponds to each of the projections 17 in the female engagement portion 20.
Can be tightly engaged with the engagement surface 21 on the inside of the container 10 to make the inside of the container 10 a sealed state.

Also, in the occlusal means 14 shown in FIG. 6, a male engaging portion 18 is formed on one packing material 1a side, and the other packing material 1 is formed.
A female engaging portion 20 is formed on the b side. Male engaging part 18
Has a circular tip 24 having a circular cross section at the tip of the leg 22, while the female engaging portion 20 includes two receiving projections 26 having an arcuate cross section, and a circular section between the receiving projections 26. A capture portion 28 for receiving the distal end portion 24 is formed. The distance between the tips of the two receiving projections 26 is larger than the diameter of the circular tip 24.

The occlusal means 14 shown in FIG.
By successively pressing both surfaces of a and 16b from the end of the packaging material, the circular distal end portion 24 pushes and spreads the distal end portions of the two receiving projections 26 and is captured in the capturing portion 28. As a result, the circular tip portion 24 and the inner surface of the receiving protrusion 26 are tightly engaged with each other, and the inside of the container 10 can be sealed.

Also, in the occlusal means 14 shown in FIG. 7, a male engaging portion 18 is formed on one side of the packaging material 1a, and the other packaging material 1 is formed.
A female engaging portion 20 is formed on the b side. Male engaging part 18
The triangular insertion portion 30 having a triangular cross section is formed at the tip of the leg portion 22, while the female engaging portion 20 has a catching portion 28 having a cross-sectional shape substantially corresponding to the triangular insertion portion 30 inside.
Are formed. Locking projections 32 project from both sides at the entrance of the capturing portion 28, and the upper portion thereof is inclined downward so as to easily receive the triangular insertion portion 30.

The occlusal means 14 shown in FIG.
By pressing both sides of the a and 16b sequentially from the end of the packaging material, the triangular insertion portion 30 is turned into two locking projections 32.
Is spread out and is captured in the capturing section 28. As a result, the triangular insertion portion 30 is engaged with the locking projection 32,
The inside of the container 10 can be sealed.

FIGS. 8 to 12 show modified examples of the occlusal means 14 shown in FIGS. The engagement means 14 shown in FIG. 8 has two protrusions 17 constituting the male engaging part 18 shown in FIG. 5 arranged side by side. On the female engaging portion 20 side, three projections 17 are arranged side by side, and two receiving portions 34 are formed between these projections 17.

In the occlusal means 14 shown in FIG.
8 are two projections 17 on the female engagement portion 20.
Into the two receiving portions 34, and the engaging surface 2 of each of the protrusions 17.
1 can be brought into close contact with each other, and the inside of the container 10 can be sealed. Therefore, a sealing ability approximately twice as large as that of the occlusion means 14 shown in FIG. 5 is obtained.

Each occlusion means 14 shown in FIGS.
In FIG. 6, two occlusal means 14 shown in FIGS. 6 and 7 are arranged in the same direction. Further, each of the occlusal means 14 shown in FIG. 11 and FIG.
4 are arranged in two with one being arranged oppositely. By adopting the structure as shown in FIGS. 9 to 12,
The sealing ability can be obtained about twice as compared with the occlusal means 14 shown in FIGS. In addition, based on the structure of FIG. 5, FIG. 6, and FIG.
Three or more sets of these may be arranged side by side, or these basic structures of different types may be variously combined with each other to form a new occlusal means.

In the occlusal means 14 shown in FIG. 13, a male engaging portion 18 is formed on one wrapping material 1a side, and a female engaging portion 20 is formed on the other wrapping material 1b side. Male engaging part 18
A protrusion piece 36 having a circular tip 24 with a circular cross section formed at the tip of the leg 22 in the same manner as the male engaging portion of the embodiment of FIG.
It is composed of On the other hand, the female engaging portion 20 is
It is configured by arranging two protruding pieces 36 having the same form as above, and the capturing portion 28 is formed between the two protruding pieces 36. The two projecting pieces 36 in the female engaging portion 20 are arranged such that the interval between the closest portions of the circular tip portions 24 of the projecting pieces 36 is equal to the circular tip portion 24 of the male engaging portion 18.
Are arranged so as to be slightly smaller than the diameter.

In the occlusal means 14 shown in FIG.
By pressing both sides of the a and 16b sequentially from the end of the packaging material, the circular distal end 24 of the male engaging portion 18 pushes and spreads the two circular distal end portions 20 of the female engaging portion 20, and the inside of the capturing portion 28 Is captured by Thereby, the male engaging portion 1
The inside of the container 10 can be sealed in such a manner that the circular tip portions 20 of the female member 8 and the female engaging portion 20 are engaged with each other.

In the occlusal means 14 shown in FIG. 14, the male engaging portion 18 formed on one of the packaging materials 1a has a triangular tip 38 having a triangular cross section at the tip of a leg 22 having a substantially triangular cross section. The projection 36 is provided. The female engaging portion 20 formed on the other packaging material 1b side is
8 is composed of two protrusions 36 of the same form as the protrusion 36. Between the two projecting pieces 36 of the female engaging portion 20, a capturing portion 28 capable of receiving the triangular tip portion 38 of the male engaging portion 18 is formed.

The occlusal means 14 shown in FIG.
By pressing both sides of the a and 16b sequentially from the end of the packaging material, the triangular tip 38 of the male engaging portion 18 pushes and expands the two triangular tip 38 of the female engaging portion 20, and the inside of the catching portion 28 is expanded. Is captured by Thereby, the male engaging portion 1
The inside of the container 10 can be sealed in such a manner that the triangular tip portions 38 of the female 8 and the female engaging portion 20 engage with each other.

Next, each of the occlusal means 14 shown in FIGS.
Will be described. In the engaging means 14 shown in FIG. 15, the male engaging portion 18 formed on the one packaging material 1a side has a projecting piece 36 having a substantially mushroom-shaped cross section. The female engaging portion 20 formed on the other packaging material 1b side is arranged such that two engaging pieces 40 having a J-shaped cross section (or a hook-shaped cross section) face inward each other. Piece 4
The capturing part 28 is formed inside the zero. FIG. 15 (a)
As shown in the figure, the distance between the tip portions 42 of the two engagement pieces 40 is smaller than the width dimension of the tip portion 41 of the projection piece 36.

In such an occlusal means 14, the packaging material 1
By successively pressing both surfaces of a and 16b from the end of the packaging material, the tip portion 41 of the protruding piece 36 which is the male engaging portion 18 is pushed into the two engaging pieces 40. At this time, the entire engagement piece 40 opens outward, and the engagement piece 40
Is bent inward to receive the protruding piece 36 into the capturing portion 28. As shown in FIG.
Is received in the catching portion 28, the distal end portion 42 of the engaging piece 40 comes into contact with the leg portion 22 of the projecting piece 36, so that the container 1
The inside of 0 can be sealed.

The biting means 14 shown in FIG.
The two engaging contact pieces 44 are further formed in the capturing portion 28 of the female engaging portion 20 using the engaging means 14 shown in FIG. In such an occlusal means 14, when the protrusion 36 is received in the capturing portion 28, the tip 41 of the protrusion 36
Makes close contact with the contact abutment piece 44 while pushing and spreading the contact abutment piece 44, so that the inside of the container 10 can be more reliably kept in a sealed state.

[0062]

EXAMPLES The present invention will be described more specifically with reference to Production Examples and Examples. The materials, amounts used, ratios, operations, and the like shown below can be appropriately changed as long as they are not excluded from the gist of the present invention. Therefore, the scope of the present invention is not limited to the following specific examples.

(Production Example 1) Production of stretched microporous resin film (1) Polypropylene having a melt flow rate (MFR) of 0.8 g / 10 min (ASTM D1238: 230 ° C, 2.16 kg load) (melting point: about 164 to 167 ° C) 81
After kneading the composition (a) obtained by mixing 3% by weight of high-density polyethylene and 16% by weight of calcium carbonate having an average particle size of 1.5 μm with an extruder set at 270 ° C.,
Extruded into a sheet, cooled by a cooling roll,
An unstretched sheet was obtained. After the sheet was heated again to 150 ° C., it was stretched five times in the machine direction using the difference in peripheral speed of the roll group to obtain a five-fold stretched film.

(2) A composition (b) in which 54% by weight of polypropylene (melting point: about 164 to 167 ° C.) having an MFR of 4 g / 10 minutes and 46% by weight of calcium carbonate having an average particle size of 1.5 μm were mixed. After kneading at 210 ° C. with an extruder,
It was extruded into a sheet shape by a die and laminated on both sides of the 5-fold longitudinally stretched film obtained in the above step (1) to obtain a three-layer laminated film. Next, after cooling the three-layered laminated film to 60 ° C., it was heated again to about 155 ° C., stretched 7.5 times in the transverse direction using a tenter, and 165
Annealing treatment was performed at ℃. After cooling to 60 ° C. and corona discharge treatment on both sides, the ears are slit and the thickness of the three-layer structure (uniaxial stretching / biaxial stretching / uniaxial stretching) is 80.
μm (B / A / B = 10 μm / 60 μm / 10 μm) laminated film having an opacity of 87%, a porosity of 31%, a density of 0.78 g / cm ³ , and a water vapor transmission rate (air permeability: temperature 40
(° C., relative humidity 90%) A stretched resin film having 3.4 g / m ² · 24 hr, an oxygen transmittance of 920 cc / m ² · 24 hr · atm, and a total light transmittance of 14% was obtained.

(Production Example 2) Production of Stretched Microporous Resin Film In Production Example 1, the thickness of each layer (B / A / B) was 15 μm.
The opacity is 82%, the porosity is 33%, and the density is 0.79 g / c, except that the width of the die lip is changed so as to obtain m / 30 μm / 15 μm (total thickness 60 μm).
A stretched resin film having m ³ , a water vapor transmission rate of 6.0 g / m ² · 24 hr, an oxygen transmission rate of 1,360 cc / m ² · 24 hr · atm, and a total light transmittance of 21% was obtained.

(Production Example 3) Production of Stretched Microporous Resin Film (1) Polypropylene having a MFR of 4 g / 10 min (melting point of about 1
64 to 167 ° C) 55% by weight, high density polyethylene 2
Calcium carbonate 2 with 5% by weight and average particle size
The composition containing 0% by weight was kneaded with an extruder set at 270 ° C., extruded into a sheet, and further cooled by a cooling roll to obtain a non-stretched sheet.

(2) After the sheet was heated again to 150 ° C., it was stretched 5 times in the machine direction to obtain a 5 times stretched film. Then, the film was heated again to 155 ° C. and stretched 7.5 times in the transverse direction using a tenter.
Annealing treatment was performed at 5 ° C. Thereafter, the mixture was cooled to 60 ° C., and after corona discharge treatment on both sides, the ears were slit and the density was 0.88 g / cm ³ , the opacity was 86%, the wall thickness was 60 μm,
Porosity 37%, water vapor transmission rate 7.2g / m ² · 24h
r, oxygen permeability 1,680 cc / m ² · 24 hr · at
m, a biaxially stretched film having a total light transmittance of 23% was obtained.

(Production Example 4) Production of stretched microporous resin film Polypropylene having a MFR of 4 g / 10 min (melting point: about 164 to
(167 ° C.) A mixture of 70% by weight, 8% by weight of high-density polyethylene and 22% by weight of calcium carbonate having an average particle size of 1.5 μm is defined as (A), and polypropylene having an MFR of 20 g / 10 min (melting point: about 164 to 167 ° C.) 40 (B), and melt-kneaded at 270 ° C. with separate extruders, and the mixture (A) was mixed with the core layer. The article (B) was laminated and co-extruded on both sides thereof, and cooled by a cooling device to obtain an unstretched three-layer sheet.
After heating this sheet to 135 ° C., a uniaxially stretched film stretched 5 times in the machine direction was obtained.

Further, both surfaces of the film were subjected to corona discharge treatment to obtain a stretched film having a three-layer structure (uniaxial stretching / uniaxial stretching / uniaxial stretching). This film has a thickness of 80 μm
(B / A / B = 10 μm / 60 μm / 10 μm) with a opacity of 87%, a porosity of 29%, and a density of 0.
85 g / cm ³ , water vapor permeability (air permeability; temperature 40 ° C.,
(Relative humidity 90%) 3.0 g / m ² · 24 hr, oxygen permeability 920 cc / m ² · 24 hr · atm, and total light transmittance 16%.

(Production Example 5) Production of stretched microporous resin film (1) 81% by weight of polypropylene (melting point: about 164 to 167 ° C) with MFR of 0.8g / 10 minutes, 3% by weight of high-density polyethylene and average particle size The composition (A) in which 16% by weight of 1.5 μm calcium carbonate was mixed was kneaded with an extruder set at 270 ° C., extruded into a sheet, and further cooled by a cooling device to obtain a non-stretched sheet. . And
After the sheet was heated again to 150 ° C., it was stretched 5 times in the machine direction to obtain a 5 times machine-stretched film.

Next, a polyproducer having an MFR of 4 g / 10 min.
54% by weight of pyrene (melting point: about 164 to 167 ° C), average
46% by weight of calcium carbonate having a particle size of 1.5 μm
Composition (B) and MFR of 4 g / 10 min (AST
MD1238: low density of 190 ° C, 2.16 kg load)
Degree polyethylene (melting point about 109-113 ° C) (C)
After kneading at 280 ° C. using separate extruders,
This is extruded into a sheet by a die, and
Laminate on both sides of the 5-fold longitudinally stretched film obtained in step (1).
Laminated film with five layers (C / B / A / B / C)
I got Next, the laminated film having the five-layer structure was heated to 60 ° C.
After cooling to about 155 ° C,
And stretched 7.5 times in the transverse direction using
Was processed. Then cool to 60 ° C and roll both sides
After the discharge treatment, the ears are slit and the five-layer structure (uniaxial
Stretching / uniaxial stretching / biaxial stretching / uniaxial stretching / uniaxial stretching)
90 μm thick (C / B / A / B / C = 10 μm / 10 μm
/ 50μm / 10μm / 10μm) laminated film,
86% opacity, 26% porosity, 0.82 g / cm density
^Three, Water vapor permeability (air permeability; temperature 40 ° C, relative humidity 90)
%) 3.4 g / m^Two・ 24 hr, oxygen permeability 1,260
cc / m^Two・ 24hr ・ atm, total light transmittance 17%
A stretched resin film was obtained.

(2) A resin composition (D) containing 3% by weight of calcium carbonate having a particle size of 0.8 μm and 97% by weight of a propylene / ethylene block copolymer having an MFR of 1.2 g / 10 min. A resin composition comprising 25% by weight of 0.0 μm calcium carbonate, 28% by weight of a propylene / ethylene block copolymer having an MFR of 1.2 g / 10 minutes, 48% by weight of a propylene homopolymer having a MFR of 4 g / 10 minutes, and 5% by weight of a low-density polyethylene. The product (E) was melt-kneaded at 260 ° C. using separate extruders, and then supplied to one die, and laminated in the die (D / E / D = 12 μm / 300).
(μm / 12 μm), extrusion-laminated on one surface of the five-layer stretched film obtained in (1) above, and compression-cooled with a roll to obtain a laminated sheet having a thickness of 414 μm.

(Production Example 6) Production of Stretched Microporous Resin Film A polyurethane-based anchor coat agent (manufactured by Toyo Morton Co., Ltd .: BL) was applied on one side of the multilayer stretched resin film obtained in Production Example 1.
4 g of an adhesive obtained by mixing 15 parts by weight of titanium oxide with 85 parts by weight of a mixture of S-2080A and BLS-2080B)
/ M ² (solid content), and then a plain woven fabric (Toray Industries, Inc .: Ponzi # 6575) is applied using a pressure roll, and a composite consisting of a plain woven fabric / shielding layer / stretched resin film I got a sheet. The thickness of this composite sheet is 126μ
m, opacity was 100%, and total light transmittance was 0%.

(Production Example 7) Production of SiO ₂ vapor-deposited gas barrier film A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm (stretched 3 times in length and 3 times in width) was coated on one surface with an isocyanate compound (Nihon Polyurethane Industry Co., Ltd.). Co., Ltd .:
Coronate L) and saturated polyester (Toyobo Co., Ltd.)
(Byron 300) was applied at a ratio of 50:50, and dried to form a resin layer having a thickness of about 0.1 μm. 8 × 10 ⁻⁵ Torr on the resin layer
Under vacuum of r, SiO ₂ having a purity of 99.9% was heated and evaporated by a high-frequency induction heating method to form a SiO ₂ film having a thickness of 50 nm. The water vapor permeability of the obtained film is 1.0 g /
m ² · 24hr, oxygen permeability 0.5cc / m ² · 24h
r.atm and total light transmittance were 84%.

(Production Example 8) Production Example of SiO ₂ Vapor Deposition Gas Barrier Film The same as Production Example 7 except that the thickness of the silicon oxide thin film was 300 nm, the water vapor permeability was 0.7 g / m ² ···. 24
hr, oxygen permeability is 0.4 cc / m ² · 24 hr · at
m, a biaxially oriented film of SiO ₂ deposited polyethylene terephthalate having a total light transmittance of 77% was obtained.

(Production Example 9) Production of amorphous aluminum oxide vapor-deposited gas barrier film A biaxially stretched polyethylene terephthalate film having a thickness of 12 μm (three times in the machine direction and three times in the transverse direction) was coated on one surface with an isocyanate compound. A primer prepared by mixing 50% of 50:50 (manufactured by Nippon Polyurethane Industry Co., Ltd .: Coronate L) and saturated polyester (manufactured by Toyobo Co., Ltd .: Byron 300) is applied and dried to a thickness of about 0.
A 1 μm resin layer was formed. Next, 8 on the resin layer
Under a vacuum of × 10 ^-5 Torr, Al ₂ O ₃ having a purity of 99.9% is heated and evaporated by a high-frequency induction heating method to a thickness of 100 n.
m of amorphous aluminum oxide film was formed. This Al ₂
O ₃ -deposited polyethylene terephthalate biaxially stretched film has a water vapor transmission rate of 3 g / m ² · 24 hr and an oxygen transmission rate of 3
cc / m ² · 24 hr · atm, and the total light transmittance was 86%.

(Production Example 10) Production of amorphous aluminum oxide deposited gas barrier film Production Example 9 except that the thickness of the Al ₂ O ₃ thin film was changed to 500 nm.
In the same manner as described above, a biaxially stretched amorphous aluminum oxide-deposited polyethylene terephthalate film having a water vapor transmission rate of 2 g / m ² · 24 hr, an oxygen transmission rate of ² cc / m ² · 24 hr · atm, and a total light transmittance of 85% was obtained.

(Example 1) Thickness 80 μm obtained in Production Example 1
After performing offset printing on the surface of the microporous stretched resin film of No. 1, 85 parts by weight of a polyurethane-based primer (manufactured by Toyo Morton Co., Ltd .: BLS-2080A and BLS-2080B) was mixed with 15 parts by weight of titanium oxide. The adhesive was applied to both sides at 4 g / m ² (solid content).
Then, the density of 0.910 g /
A low-density polyethylene film having a thickness of 30 μm and an MFR of 4 g / 10 min. in cm ³ was adhered, and the film side of the SiO ₂ vapor-deposited polyethylene terephthalate biaxially stretched film obtained in Production Example 7 was adhered to the opposite printing surface. About 134 thick
A μm packaging material was produced. The opacity of this packaging material is 10
0%, total light transmittance is 0%, water vapor permeability is 0.0 g /
m ² · 24hr, oxygen permeability 0.2cc / m ² · 24h
r · atm.

Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 5, and the other was formed with the female engaging portion shown in FIG. Two sheets of this packaging material are stacked so that the low-density polyethylene film sides face each other, and the three sides are 190 mm in width of 10 mm.
180m vertical with heat impulse seal at 30 ° C for 30 seconds
A bag having a width of 120 mm and a width of 120 mm was formed after confirming that metal powder was not mixed in with a metal detector from outside the bag. This bag is filled with 50 g of high-grade green tea, the opening is heat-sealed, and once opened, the bite means is closed and the relative humidity is 75%.
% In a constant temperature room at a temperature of 25 ° C. for 3 months. Next, the bag was opened, and the presence or absence of discoloration and the flavor of the sencha were examined, and none of them was inferior to the sencha before packaging.

(Example 2) Thickness of 60 μm obtained in Production Example 2
A polyurethane-based primer (manufactured by Toyo Morton Co., Ltd .: BLS-2080) is provided on both sides of the stretched microporous resin film.
A and BLS-2080B) in an amount of 0.5 g / m
² (solid content) was applied. Next, the SiO ₂ obtained in Production Example 8 was used.
Gravure printing was performed on the polyethylene terephthalate film side of the vapor-deposited polyethylene terephthalate biaxially stretched film, and the printed surface was bonded to the microporous resin stretched film coated with the above primer. A low-density polyethylene film having a thickness of 40 μm was adhered to the other surface (back surface) of the stretched microporous resin film coated with the primer.
Furthermore polyurethane primer SiO ₂ deposition surface (Toyo Morton Co., Ltd.: BLS-2080 a and BLS-20
80B) (0.5 g / m ² (solid content)),
A low-density polyethylene film having a thickness of 40 μm was bonded. Wall thickness about 153μm, water vapor transmission rate 0.1g / m ²・
24 hr, oxygen permeability 0.3 cc / m ² · 24 hr · a
tm, an opacity of 89%, and a total light transmittance of 0% were obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 6, and the other was formed with a female engaging portion shown in FIG.
A bag of the same dimensions was prepared in the same manner as in Example 1, filled with candy, sealed, opened once, closed with the occlusal means, and left in the room for 3 months. Three months later, I opened it,
Inspection of the candy showed no change in appearance or taste.

(Example 3) In Example 1, Production Example 1
Production Example 3 in place of the microporous resin stretched film obtained in
In the same manner except that the stretched resin film having a thickness of 60 μm obtained in the above was used, the thickness was about 114 μm, the opacity was 100%, the total light transmittance was 0%, the water vapor permeability was 0.9 g / m ² · 24 hr,
A packaging material having an oxygen permeability of 0.5 cc / m ² · 24 hr · atm was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 7, and the other was formed with a female engaging portion shown in FIG. A bag is formed in the same manner as in Example 1, and the bath powder 60
After filling with g and heat sealing the opening, it was confirmed from the outside of the bag that no metal powder was mixed with a metal detector. After opening once, the bite means was closed, left in a constant temperature room at 40 ° C. and 90% humidity for 3 months, and then opened. There was no blocking of the bathing agents, and no change was observed in the quality.

(Example 4) Production Example 1
Production Example 4 in place of the microporous resin stretched film obtained in
Approximately 133 μm in thickness, 100% in opacity, 0% in total light transmittance, 0% in total light transmittance, 0.1 g / m ² · 24 hr in water vapor, except that the stretched resin film having a thickness of 80 μm obtained in the above was used.
A packaging material having an oxygen permeability of 0.3 cc / m ² · 24 hr · atm was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 8, and the other was formed with the female engaging portion shown in FIG. A bag was formed in the same manner as in Example 1,
0 g, the opening was heat-sealed, and once opened, the occlusal means was closed and the relative humidity was 75% and the temperature was 2%.
It was left in a constant temperature room at 5 ° C. for 3 months. Then open the bag,
The presence of discoloration and the flavor of the green tea were examined, and none of them was comparable to the green tea before packaging.

(Example 5) After performing gravure printing on the polyethylene terephthalate film side of the SiO ₂ -deposited polyethylene terephthalate biaxially stretched film obtained in Production Example 8, a polyester polyol-polyisocyanate urethane was formed on the SiO ₂ -deposited thin film surface. Apply adhesive (2g
/ M ² ), and a low-density polyethylene film was melt-extruded thereon and dry-laminated to obtain a laminated film having a thickness of about 34 μm. A polyester polyol / polyisocyanate-based adhesive was applied at 4 g / m ² on the E side of the 414 μm thick laminated sheet obtained in Production Example 5, and then the above-mentioned 34 μm thick laminated film biaxial Layered so that the stretched polyethylene terephthalate film side is in contact,
It was pressure-bonded with a roll to obtain a carton box packaging material (wall thickness: 452 μm).

Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 9, and the other was formed with the female engaging portion shown in FIG. After cutting this packaging material and assembling it into a box shape, the adhesive part was heat-sealed to form a 1-liter carton box. Pour sake into this box, heat seal the open mouth, open it once, close the bite means, store it for 3 months, open it and taste the sake, but keep it in a comparable glass bottle There was no difference in taste with the same brand of sake.

(Embodiment 6) Production Example 1
Microporous using the composite sheet obtained in Production Example 6 in place of the stretched resin film, a microporous resin is SiO ₂ deposited polyethylene terephthalate biaxially stretched film / primer layer / print film / barrier layer / plain weave fabric of / A packaging material having a structure of a primer layer / heat-sealing polyethylene film layer was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 10, and the other was formed with a female engaging portion shown in FIG. The thickness of this packaging material is about 180 μm, opacity 100%, total light transmittance 0%, water vapor transmittance 0.0 g /
m ² · 24hr, oxygen permeability 0.1cc / m ² · 24hr
-It was atm.

[0086] The two sheets were superposed on each other so that the low-density polyethylene film sides face each other.
The bag was heat-sealed with a width to form a bag having a length of 300 mm and a width of 210 mm. This bag was filled with 200 g of coffee beans, the opening was heat-sealed, and once opened,
The occlusal means was closed and stored in a room at a temperature of 40 ° C. and a relative humidity of 75% for 3 months. Three months after opening the package and examining the coffee beans, there was no discoloration. Also, put the beans at 95 ℃
The smell and taste of the coffee roasted in Nonoyu was not much different from before the encapsulation.

(Example 7) In Example 1, the production example 7
A packaging material having a wall thickness of about 134 μm was obtained in the same manner except that the aluminum oxide-deposited polyethylene terephthalate biaxially-stretched film obtained in Production Example 9 was used instead of the SiO ₂ -deposited polyethylene terephthalate biaxially-stretched film obtained in 1. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 11, and the other was formed with a female engaging portion shown in FIG. The opacity of this packaging material was 100%, the total light transmittance was 0%, the water vapor permeability was 2 g / m ² · 24 hr, and the oxygen permeability was 1 cc / m ² · 24 hr · atm. A bag is formed in the same manner as in Example 1, and 50
g, the opening was heat-sealed, and once opened, the occlusal means was closed and the relative humidity was 75% and the temperature was 25%.
It was left for 3 months in a constant temperature room at ℃. Next, the bag was opened, and the presence or absence of discoloration and the flavor of the sencha were examined, and none of them was inferior to the sencha before packaging.

(Embodiment 8)
Instead of SiO ₂ deposited polyethylene terephthalate biaxially stretched film in obtained, in resulting aluminum oxide deposited polyethylene terephthalate biaxially stretched film used other are Similarly wall thickness of about 133μm preparation 10, opacity 10
0%, the total light transmittance of 0%, a water vapor permeability of 3g / m ² · ²
A packaging material having an oxygen permeability of 4 cc / m ² · 24 hr · atm was obtained for 4 hr. Prepare two sheets of this packaging material,
A male engaging portion having the form shown in FIG. 1 was formed, and a female engaging portion shown in FIG. A bag was formed in the same manner as in Example 1, filled with 60 g of bath powder, heat-sealed the opening, and after checking from the outside of the bag that there was no metal powder mixed in with a metal detector, the bag was temporarily removed. Open, close the occlusal means, 40 ° C, humidity 9
It was left in a 0% constant temperature room for 3 months and then opened. There was no blocking of the bathing agents, and no change was observed in the quality.

(Example 9) After performing offset printing on the surface of the microporous stretched resin film obtained in Production Example 1, a polyurethane-based primer (Toyo Morton Co., Ltd.)
Manufactured by: BLS-2080A and BLS-2080B) 85 g by weight of an adhesive prepared by mixing 15 parts by weight of titanium oxide with 4 g / m ² (solid content), and SiO ₂ vapor deposition obtained in Production Example 7 thereon The polyethylene terephthalate biaxially-stretched film side of the polyethylene terephthalate biaxially-stretched film is adhered, and an ethylene / polyethylene terephthalate having a melting point of 105 ° C.
Methyl methacrylate copolymer film (thickness 30 μm)
Is extruded at 230 ° C. and has a thickness of about 128 μm.
Was manufactured. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 13, and the other was formed with a female engaging portion shown in FIG. This packaging material has an opacity of 100%,
Total light transmittance of 0%, a water vapor permeability of 0.0g / m ² · 24
hr, oxygen permeability 0.2 cc / m ² · 24 hr · atm
It was shown.

Two pieces of this packaging material were overlapped so that the ethylene / methyl methacrylate copolymer film side was opposed to each other, and three sides were heat-impulse-sealed at 190 ° C. for 30 seconds at a width of 10 mm, and were 180 mm long and 120 mm wide. I got a bag of the size. Next, it was confirmed with a metal detector that metal powder was not mixed in from the outside of the bag. This bag is filled with 50 g of high-grade green tea, the opening is heat-sealed, and once opened, the bite means is closed and the relative humidity is 75%.
% In a constant temperature room at a temperature of 25 ° C. for 3 months. Three months later, the bag was opened and the presence of discoloration and the flavor of the green tea were examined.
All were comparable to the green tea before packaging.

(Example 10) Thickness 6 obtained in Production Example 2
Offset printing is performed on the surface of a 0 μm stretched microporous resin film, and a polyurethane primer (BLS-2080A and BLS-2 manufactured by Toyo Morton Co., Ltd.) is formed on the back surface.
080B) (0.5 g / m ² (solid content)), and the SiO ₂ deposited surface of the biaxially stretched SiO ₂ deposited polyethylene terephthalate film obtained in Production Example 8 was adhered thereon. A low-density polyethylene film having a thickness of 40 μm is extrusion-laminated on the back side at 230 ° C. to form a heat seal layer. The thickness is about 113 μm, the water vapor permeability is 0.1 g / m ² · 24 hr, and the oxygen permeability is 0.3 cc / m. ^Two
・ 24 hr ・ atm, opacity 89%, total light transmittance 0
% Packaging material was obtained.

Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 14, and the other was formed with a female engaging portion shown in FIG. Next, a bag of the same dimensions was prepared in the same manner as in Example 9, filled with candy, sealed, and then opened once, the biting means was closed, and the bag was left in the room for 3 months.
Three months later, the candy was opened and the candy was inspected, but there was no change in appearance or taste.

Example 11 The procedure of Example 9 was repeated, except that the stretched resinous film obtained in Production Example 3 was used instead of the stretched microporous resin film obtained in Production Example 1. The thickness was about 10 ⁸ μm and the opacity was 1
00%, total light transmittance 0%, water vapor permeability 1 g / m ² ·
24 hr, oxygen permeability 0.5 cc / m ² · 24 hr · a
tm of packaging material was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 15, and the other was formed with a female engaging portion shown in FIG. A bag is formed in the same manner as in Example 9,
After filling the bath powder 60g and heat sealing the opening, it was confirmed from the outside of the bag that there was no metal powder mixed in with a metal detector, and this was once opened and the bite means was closed, It was left in a constant temperature room at 40 ° C. and 90% humidity for 3 months.
After opening three months, there was no blocking of the bathing agents and no change in quality was observed.

Example 12 The procedure of Example 9 was repeated, except that the stretched microporous resin film obtained in Production Example 1 was replaced with the stretched resin film having a thickness of 80 μm obtained in Production Example 4. Approximately 127 μm thick, opacity 100%, total light transmittance 0%, water vapor transmittance 0.2 g / m ² · 24h
As a result, a packaging material having an oxygen permeability of 0.3 cc / m ² · 24 hr · atm was obtained. Two sheets of this packaging material are prepared, and one
A male engaging portion having the form shown in FIG. 1 was formed, and a female engaging portion shown in FIG. A bag was formed in the same manner as in Example 9, 50 g of high-grade green tea was filled, the opening was heat-sealed, and once this was opened, the biting means was closed and the relative humidity was 75%.
It was left in a constant temperature room at a temperature of 25 ° C. for 3 months. Three months later, the bag was opened and the presence or absence of discoloration and the flavor of the sencha were examined, and none of them was inferior to the sencha before packaging.

(Example 13) In Example 9, the composite sheet obtained in Production Example 6 was used instead of the microporous resin stretched film of Production Example 1, and the printed microporous resin film / shielding layer / plain weave was used. A packaging material having a structure of woven fabric / primer layer / biaxially stretched SiO ₂ evaporated polyethylene terephthalate film / heat-sealing ethylene / methyl acrylate copolymer heat-sealing film layer (30 μm) was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 13, and the other was formed with a female engaging portion shown in FIG. This packaging material has a thickness of about 175 μm, an opacity of 100%, a total light transmittance of 0%, a water vapor permeability of 0.0 g / m ² · 24 hr, and an oxygen permeability of 0.1 cc / m ² · 24 hr · atm. Met.

[0096] Two sheets of this were overlaid with the ethylene-methyl acrylate copolymer heat seal film side facing each other, and heat-sealed on three sides with a width of 15 mm to form a bag having a length of 300 mm and a width of 210 mm. The bag was filled with 200 g of coffee beans, the opening was heat-sealed, and once opened, the occlusal means was closed and stored in a room at a temperature of 40 ° C. and a relative humidity of 75% for 3 months.
Three months later, I opened it and examined the coffee beans, but there was no discoloration.
In addition, the smell and taste of the coffee in which the beans were roasted in hot water at 95 ° C. were not much different from those before encapsulation.

(Example 14) Thickness of 414 μm of Production Example 5
The offset printing was performed on the surface (C surface) of the stretched resin film of the laminated sheet of (1). Next, the SiO ₂ obtained in Production Example 8 was used.
A laminate was obtained by extrusion laminating an ethylene / methyl acrylate copolymer film (thickness: 10 μm) having a melting point of 105 ° C. at 230 ° C. on the back surface of the evaporated biaxially stretched polyethylene terephthalate film. Then on the not subjected to printing of the laminated sheet faces, a polyester polyol-polyisocyanate based adhesive 4g / m ² was applied, the SiO ₂ surface of the laminate formed by depositing the SiO ₂ to the adhesive face The sheets were overlapped so as to be in contact with each other, and pressed with a roll to obtain a packaging material (about 460 μm in thickness) for a carton box.

Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 14, and the other was formed with a female engaging portion shown in FIG. After cutting this packaging material and assembling it into a box shape, the adhesive part was heat-sealed to form a 1-liter carton box. After the sake was put into the box and the opening was heat-sealed, it was opened once, the bite means was closed and stored for 3 months. Three months later, the bottle was opened and the taste of the sake was confirmed, but there was no difference in taste between the sake of the same brand and stored in a glass bottle.

Example 15 After the offset printing was performed on the surface of the microporous stretched resin film obtained in Production Example 1, a polyurethane primer (manufactured by Toyo Morton Co., Ltd .: BLS-2080A and BLS-) was formed on the back surface. A mixture of 2080B) and 85 parts by weight of an adhesive obtained by mixing 15 parts by weight of titanium oxide with 4 g / m ² (solid content) were applied thereto, and then the aluminum oxide-deposited polyethylene terephthalate biaxially stretched obtained in Production Example 9 was applied thereto. Glue the back side of the film,
Further, the density is 0.910 g / cm ³ and the MFR is 4 g / 10
Then, a low-density polyethylene film having a thickness of 10 μm was adhered to produce a packaging material having a thickness of about 10 ⁻⁸ μm.

[0100] Two sheets of this packaging material were prepared, and one of them was shown in FIG.
Form the male engaging part of the form shown, and the female engaging part of the same figure on the other side
Formed. This packaging material is 100% opaque and fully transparent.
Pass rate 0%, water vapor transmission rate 2g / m ^Two・ 24 hours, oxygen permeability
1cc / m^Two・ 24 hr · atm. This package
Two low density polyethylene film sides facing each other
So that the three sides are 10 mm wide and 3 degrees at 190 ° C.
Heat impulse seal for 0 seconds, length 180mm, width
A 120 mm bag was formed. Heat impulse seal
No metal powder from outside of the bag with a metal detector
Was performed while confirming. 50g of high-grade green tea in this bag
Filled, heat-sealed the opening, and opened this once
After that, close the bite means, relative humidity 75%, temperature 25 ° C
In the constant temperature room for 3 months. After three months, open the bag
The presence of discoloration and the flavor of the green tea were examined.
It was comparable to Sencha.

Example 16 The procedure of Example 15 was repeated, except that the stretched microporous resin film obtained in Production Example 1 was replaced with the 80 μm-thick resin stretched film obtained in Production Example 4. Thickness of about 10 ⁸ μm, opacity 100%, total light transmittance 0%, water vapor permeability 0.2g / m ² · 24h
As a result, a packaging material having an oxygen permeability of 0.3 cc / m ² · 24 hr · atm was obtained. Two sheets of this packaging material are prepared, and one
A male engaging portion having the form shown in FIG. 1 was formed, and a female engaging portion shown in FIG. A bag was formed in the same manner as in Example 15, filled with 50 g of high-grade green tea, the opening was heat-sealed, and once opened, the occlusal means was closed and the relative humidity was 75%.
% In a constant temperature room at a temperature of 25 ° C. for 3 months. Three months later, the bag was opened and the presence or absence of discoloration and the flavor of the sencha were examined, and none of them was inferior to the sencha before packaging.

(Example 17) The thickness of 60 μm obtained in Production Example 2
m on both sides of a stretched microporous resin film, a polyurethane-based primer (BLS-208, manufactured by Toyo Morton Co., Ltd.)
OA and BLS-2080B) in an amount of 0.5 g /
m ² (solid content) was applied. Next, the Si obtained in Production Example 8
Gravure printing was performed on the SiO ₂ deposition side of the O ₂ -deposited polyethylene terephthalate biaxially stretched film, and the printed surface was bonded to the microporous resin stretched film coated with the primer. A low-density polyethylene film having a thickness of 40 μm is adhered to the other surface (back surface) of the stretched microporous resin film coated with the primer to a thickness of about 114 μm, a water vapor permeability of 0.2 g / m ² · 24 hr, oxygen Transmittance 0.
A packaging material having 4 cc / m ² · 24 hr · atm, opacity of 89% and total light transmittance of 0% was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 6, and the other was formed with a female engaging portion shown in FIG. A bag of the same dimensions was prepared in the same manner as in Example 1, filled with candy, sealed, opened once, closed with the occlusal means, and left in the room for 3 months. Three months later, I opened it and inspected the candy.
There was no change in appearance or taste.

[0103] Instead of (Example 18) SiO ₂ deposited polyethylene terephthalate biaxially stretched film obtained in Production Example 8 In Example 17, except for using aluminum oxide deposited polyethylene terephthalate biaxially stretched film obtained in Production Example 10 The same Thickness of about 114 μm, water vapor permeability 0.3 g / m ² · 24 hr, oxygen permeability 0.5 cc /
A packaging material having m ² · 24 hr · atm, opacity of 89% and total light transmittance of 0% was obtained. Two pieces of this packaging material were prepared, one of which was formed with a male engaging portion having the form shown in FIG. 6, and the other was formed with a female engaging portion shown in FIG. A bag of the same dimensions was prepared in the same manner as in Example 1, filled with candy, sealed, opened once, closed with the occlusal means, and left in the room for 3 months.
Three months later, the candy was opened and the candy was inspected, but there was no change in appearance or taste.

[0104]

By closing the biting means even after opening the bag-shaped container, the inside is sealed and the contents can be stored for a long period of time. Further, even after the container is once opened, the container can be transported without fear of leakage of the contents by closing the biting means. In addition, it is a packaging material with excellent light blocking properties and gas barrier properties, and containers such as bags and carton boxes formed by performing secondary processing using this packaging material are used to check whether metal powder is mixed in the contents. The inspection can be performed with a metal detector from outside the container.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view of a packaging material according to an embodiment of the present invention.

FIG. 2 is a perspective view of a green tea bag obtained by processing the packaging material of FIG.

FIG. 3 is an enlarged sectional view of a packaging material according to another embodiment of the present invention.

FIG. 4 is a perspective view of a green tea bag obtained by processing the packaging material of FIG. 3;

FIG. 5 is a schematic diagram showing an embodiment of an occlusion means.

FIG. 6 is a schematic diagram showing another embodiment of the occlusion means.

FIG. 7 is a schematic diagram showing still another embodiment of the occlusion means.

FIG. 8 shows still another embodiment of the occlusal means.
It is a schematic diagram which shows the modification of embodiment.

FIG. 9 shows still another embodiment of the occlusal means.
It is a schematic diagram which shows the modification of embodiment.

10 is still another embodiment of the occlusion means, and is a schematic view showing a modified example of the embodiment of FIG. 7;

FIG. 11 is a schematic diagram showing still another embodiment of the occlusal means, and showing another modification of the embodiment of FIG. 6;

FIG. 12 is a schematic diagram showing still another embodiment of the occlusal means, showing another modified example of the embodiment shown in FIG. 7;

FIG. 13 is a schematic diagram showing still another embodiment of the occlusion means.

FIG. 14 is a schematic view showing still another embodiment of the occlusion means.

FIG. 15 is a schematic view showing still another embodiment of the occlusion means.

FIG. 16 is a schematic diagram showing still another embodiment of the occlusion means, which is a modified example of FIG.

[Explanation of symbols]

 I Microporous resin stretched film base layer Ia Heat sealing resin adhesive layer Ib Primer II Gas barrier resin film layer III Inorganic oxide thin film layer IV Heat sealing resin adhesive layer 1, 1a, 1b Packaging material A Core layer B Surface layer B 'back surface layer P printing 10 container 12 entrance part 14 biting means 17 projection part 18 male engagement part 20 female engagement part 21 engagement surface 22 leg part 24 circular tip part 26 receiving projection 28 capture part 30 triangular insertion part 32 Stop projection part 34 Receiving part 36 Projection piece 38 Triangular tip part 40 Engagement piece 41 Tip part of projection piece 42 Tip part of engagement piece 44 Close contact piece

Claims (23)

[Claims] 1. A bag-shaped container formed by heat-welding end faces of two packaging materials, wherein an opening and closing occlusal means is provided at an entrance of the bag-shaped container. Opacity (JI)
(SP-8138) is 80% or more, a heat-sealing resin adhesive layer (Ia) is laminated on one surface of a microporous resin stretched film base layer (I), and an inorganic oxide thin film layer (III) is formed on the other surface. ) Provided gas barrier resin film layer (I)
A laminate having a layer structure obtained by laminating I), wherein the laminate has a moisture permeability (JIS Z-0208) of 5 g / m ^2.
・ Oxygen permeability (JIS Z-170) at 24 hours or less
(7) a bag-like container characterized by having a pressure of 5 cc / m ² · 24 hr · atm or less. 2. The heat-sealable resin adhesive layer (Ia).
The bag-shaped container according to claim 1, wherein a heat-sealable resin layer (IV) is provided on the outermost layer on the opposite side of the container. 3. The stretched microporous resin film base layer (I) has a thickness of 30 to 300 μm, the heat-sealable resin layer (Ia) has a thickness of 1 to 50 μm, and the gas barrier resin film layer (II). )), And the thickness of the inorganic oxide thin film layer (III) is 5 to 600 nm.
The bag-like container according to claim 1, wherein the packaging material has a total thickness of 80 to 350 μm. 4. A bag-shaped container formed by heat-welding end faces of two packaging materials, wherein an opening and closing occlusal means is provided at an entrance of the bag-shaped container. Opacity (JI)
A gas barrier resin film layer (II) provided with an inorganic oxide thin film layer (III) is laminated on a microporous resin stretched film base layer (I-8) having 80% or more of SP-8138), and further thereon. Heat-sealable resin adhesive layer (IV)
Having a layer structure obtained by laminating a laminate having a moisture permeability (JIS Z-0208) of 5 g / m ² · 2.
A bag-like container characterized by having an oxygen permeability (JIS Z-1707) of 5 cc / m ² · 24 hr · atm or less at 4 hours or less. 5. The gas barrier resin film layer (II) between the microporous resin stretched film base layer (I) and the inorganic oxide thin film layer (III). 5. The bag-shaped container according to any one of items 1 to 4. 6. The inorganic oxide thin film layer (III) between the microporous resin stretched film base layer (I) and the gas barrier resin film layer (II). 5. The bag-shaped container according to any one of items 1 to 4. 7. The bag-shaped container according to claim 1, wherein a printing (P) is applied to one surface of the microporous resin stretched film base layer (I). 8. The method according to claim 7, wherein the surface on which the printing (P) is performed is a surface opposite to the surface on which the gas barrier resin film layer (II) is formed. The bag-shaped container according to the above. 9. The gas barrier resin film layer (I)
The bag-shaped container according to any one of claims 1 to 6, wherein printing (P) is performed on one surface of I). 10. The bag-like container according to claim 1, wherein printing (P) is performed on one surface of the inorganic oxide thin film layer (III). 11. The total light transmittance of the packaging material (JIS K-
The bag-like container according to any one of claims 1 to 10, wherein 7105) is 0%. 12. The inorganic oxide thin film layer (III),
The bag-shaped container according to any one of claims 1 to 11, which is a silicon oxide thin film layer or an amorphous aluminum oxide thin film layer. 13. The stretched microporous resin film base layer (I) is a uniaxially stretched or biaxially stretched thermoplastic resin film containing 0 to 40% by weight of a white inorganic fine powder and / or an organic filler. To the core layer (A)
And white inorganic fine powder and / or
Or a laminated stretched film provided as a front and back layer (B, B ') with a uniaxially stretched thermoplastic resin film containing an organic filler of 0 to 65% by weight. The bag-shaped container according to item 1. 14. The microporous resin stretched film base layer (I) has a porosity of 10 to 60% represented by the following formula:
A bag-like container according to claim 13. (Equation 1) ρ ₀ : true density of resin film ρ ₁ : density of resin film 15. The method according to claim 15, wherein the engaging means comprises a male engaging portion formed on one of the two packaging materials and a female engaging portion formed on the other of the two packaging materials. The bag-like container according to any one of claims 1 to 14, wherein 16. The male engaging portion has a projection, the female engaging portion has two projections, and the female engaging portion has two projections.
The bag-like container according to claim 15, wherein the projection of the male engagement portion is engageable between two projections. 17. The bag-like container according to claim 15, wherein said male engaging portion has a circular tip portion, and said female engaging portion has a catch portion capable of receiving said circular tip portion. 18. The bag-like container according to claim 15, wherein the male engaging portion has a triangular insertion portion, and the female engaging portion has a catch portion capable of receiving the triangular insertion portion. 19. The bag-shaped container according to claim 15, wherein a plurality of combinations of the male engaging portion and the female engaging portion are formed. 20. The male engaging portion includes a projection having a circular tip, and the female engaging portion includes a projection having the same shape as the projection.
16. A catching portion comprising an array of two projecting pieces, the catching portion being capable of receiving a circular tip portion of the male engaging portion between the two projecting pieces of the female engaging portion.
The bag-shaped container according to item 1. 21. The male engaging portion includes a protrusion having a triangular tip, and the female engaging portion includes a protrusion having the same shape as the protrusion.
16. A catching portion comprising an array of two projecting pieces, wherein a capturing portion capable of receiving a triangular tip portion of the male engaging portion is provided between two projecting pieces of the female engaging portion.
The bag-shaped container according to item 1. 22. The male engaging portion includes a protruding piece having a mushroom-shaped cross section, and the female engaging portion includes two engaging pieces having a J-shaped cross section and disposed opposite to each other. The bag-like container according to claim 15, further comprising a catching portion that can receive the protruding piece between the pieces. 23. Two closely contacting pieces are formed in the capturing portion, and when the protrusion of the male engaging portion is inserted into the capturing portion, the tip of the projecting piece contacts the two closely contacting pieces. The bag-like container according to claim 15, wherein the bag-like container is in close contact with the piece.