JP2009039979A - Multilayered film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light shielding multilayered film, which is excellent in light shielding property, aluminum-less, excellent in barrier property for preventing permeation of oxygen gas and steam or barrier property for preventing penetration and permeation of a component in a content, in addition to excellent laminate strength, heat seal property, strength or the like, and further excellent in toughness such as weather resistance, heat resistance, water resistance and others, shows beautiful decorativeness without impairing the packaging appearance with excellent content-filling and packaging adaptability, storage adaptability or the like, facilitates foreign matter inspection by a metal detector, and generates no toxic substance in incineration disposal after use with extremely excellent disposal treatment adaptability, environmental adaptability or the like. <P>SOLUTION: The multilayered film has a laminated structure obtained by successively laminating a white polyolefin resin layer, a gray light shielding and barrier resin layer, and a transparent or translucent back polyolefin resin layer. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a multilayer laminated film. More specifically, the present invention has excellent light-shielding properties, barrier properties, heat seal properties, etc., and also has excellent fastness properties, content protection suitability, , Excellent cosmetics, encouraging consumers to purchase without losing the appearance of the package, mainly filling boiled / retort foods, fats and oils, frozen foods, snacks, optical industrial materials, etc. It relates to a multilayer laminated film useful for packaging.

Conventionally, as laminated film filling and packaging boiled / retort foods, fats and oils, frozen foods, snacks, optical industrial materials, etc., content protection, especially in the ultraviolet to visible range as a measure to prevent fat oxidation Various physical properties are required, such as a light-blocking property that blocks sunlight or fluorescence, etc., a barrier property that blocks the transmission of oxygen gas, water vapor, etc., a barrier property that blocks the penetration and penetration of components in the contents, and others. Is.
Thus far, as the most general material that satisfies the above-mentioned various physical properties, aluminum foil, an aluminum deposited film, or the like has been used.
By the way, when the above aluminum foil or aluminum vapor deposition film is used, the aluminum foil, aluminum vapor deposition film or the like has a barrier property to prevent transmission of oxygen gas, water vapor and the like, and also has a light shielding property such as sunlight or fluorescence, Although it is a very useful material because it has aroma retaining properties, etc., the aluminum foil, etc. lacks bending resistance, etc., so that pinholes are likely to occur and the barrier properties are impaired. In addition to being used as a packaging container, when it is disposed of as garbage, for example, if it is disposed of by incineration, etc., metal such as aluminum remains, which may damage the incinerator, and the disposal It is preferred because it lacks suitability and causes problems such as environmental destruction and lacks suitability for the environment. It is those not Ku.
Furthermore, when using an aluminum foil or an aluminum vapor deposition film, for example, using a metal detector or the like to detect a metal piece (foreign matter) or the like mixed in the contents, There is also a problem that it is extremely difficult for the aluminum foil or the aluminum vapor deposition film to react with a metal detector and detect the metal piece (foreign matter) for inspection.

For this reason, in recent years, various materials satisfying light-shielding properties, barrier properties, etc. have been developed and proposed in place of the above-described aluminum foil or aluminum vapor-deposited film.
For example, as one of them, the content of the white pigment is 5 to 20% by weight and the thickness is 10 μm or more, and the content of the black pigment is 0.2 to 1.0% by weight. And a laminated film for food packaging comprising a white pigment in a ratio of 2.0 to 60 by weight with respect to the black pigment 1 and a laminate of a gray film having a thickness of 10 μm or more, and Has proposed a laminated film for food packaging in which a film layer made of an ethylene-α-olefin copolymer is laminated on the gray film side of the laminated film for food packaging (for example, see Patent Document 1).
As another example, a light-shielding packaging material in which a transparent barrier film having a gas barrier property, a printing ink layer, and a heat-sealing resin layer are laminated in order from at least the outside has also been proposed ( For example, see Patent Document 2.)
JP-A-11-91042 (Claims) JP 2000-280394 A (claim)

However, the laminated film for food packaging according to the above-mentioned Patent Document 1 is used to produce a packaging material by laminating other base film and the like, and then the packaging material is used to make a bag. In the case of manufacturing a packaged product by filling and packaging, for example, retort food, snack confectionery, fats and oils, frozen food, etc. In packaged products filled with frozen food, etc., components in the contents are adsorbed, permeated, and permeated from the inner surface of the packaging material constituting the packaging bag in the processing process such as retort processing or freezing processing. There is a problem that the laminated film for food packaging constituting the packaging material is contaminated or colored, and the cosmetics, appearance and the like are impaired, and further, the components in the contents are adsorbed, permeated and permeated, For packaging Cost lamination - DOO strength or its heat - tosylate - lack of Le resistance strength, etc., delamination or breakage, etc., there is a problem that it is difficult to produce a desired packaging products.
Moreover, about the laminated | multilayer film for food packaging which concerns on said patent document 1, this was used as a packaging material which wraps the photosensitive material etc. as an industrial member, and this wrapped the photosensitive material and manufactured the packaging product. However, the light shielding function is inferior, and it has been found that the above-described laminated film for food packaging cannot be used as a packaging material for packaging a photosensitive material or the like. In general, a photosensitive material is required to have a high light-shielding property (complete light-shielding) from the ultraviolet region to the visible region in order to protect contents and optical functionality.
By the way, in order to protect products such as photosensitive materials as industrial members, it is necessary to shield the light rays in the entire region. The visible light region of 400 nm to 700 nm and the shielding of ultraviolet light of 400 nm or less It is essential and needs to be shielded even with infrared light of 700 nm or more as much as possible.
Up to now, packaging materials for packaging photosensitive materials and the like have been mainly made of packaging materials made of silver base that complement the light shielding function from laminated materials of aluminum foil. is there.
However, the use of aluminum foil or the like not only has the above-mentioned problems, but also has the problem of causing deterioration of the working environment and surrounding environment due to the use of an adhesive during lamination. It is.
Moreover, about the light-shielding packaging material which concerns on said patent document 2, using this, manufacturing a bag by manufacturing a bag, and using this packaging bag after that, for example, boiled retort food, When manufacturing packaged products by filling and packaging snacks, fats and oils, frozen foods, etc., especially for packaged products filled and packaged with retort foods, frozen foods, etc. In the processing process, etc., the components in the contents are adsorbed, permeated and permeated from the inner surface of the packaging material constituting the packaging bag, so that the printing ink layer, the heat sealing resin layer, etc. constituting the packaging material are not contaminated. There is a problem that the cosmetics, appearance, etc. are colored, and the laminating strength of the packaging material or the heat fusion resin thereof is obtained by adsorbing, penetrating and permeating the components in the contents. Heat seal of layer Lack degrees like, delamination or breakage, etc., there is a problem that it is difficult to produce a desired packaging products.

  Therefore, the present invention is excellent in light-shielding properties, is aluminum-free, and has barrier properties that prevent permeation of oxygen gas, water vapor, etc., or barrier properties that prevent penetration and permeation of components in the contents. Excellent, in addition, excellent laminating strength, heat seal strength, etc., and other excellent fastness such as weather resistance, heat resistance, water resistance, etc. It has extremely excellent utility as a packaging material for photosensitive materials as industrial members that require complete light shielding, as well as food and drink products, chemical products, etc., and is excellent in filling and packaging suitability, storage suitability, etc. In addition, it has excellent cosmetics without damaging the packaging appearance, and it is easy to inspect foreign materials with a metal detector, and it does not generate harmful substances when incineration disposal after use. Extremely good shading To provide a multilayer laminate film.

  As a result of various studies to improve the problems as described above, the present inventor uses a polyolefin-based resin and a barrier resin as a medium, pays attention to the coextrusion lamination processability, and shades by a black pigment, Paying attention to the light-shielding property by the white pigment and its cosmetic appearance, and further the barrier property by the barrier resin, first, at least a polyolefin-based resin as a main component, and further a resin composition containing a white pigment, oxygen gas, and A resin composition containing as a main component a barrier resin that prevents the permeation of water vapor, or prevents the penetration and permeation of components in the contents, and further contains a black pigment and a white pigment, and a polyolefin resin Are used as a main component, and each of the resin compositions is co-extrusion laminated to produce at least a white polyolefin-based resin layer and a gray color. Producing a coextruded laminated film in which a light-shielding and barrier resin layer and a transparent or translucent backside polyolefin-based resin layer are sequentially laminated, and thus the co-extruded laminated film has a light-shielding property, a barrier property, and It is used as a material that exerts effects such as heat seal properties, etc., and laminates of the coextruded laminate film and at least other substrate films are produced to produce laminates having various laminate configurations, Using the laminated material, the bag is produced to produce a desired packaging bag, and then the packaging bag is filled with, for example, boiled / retort food, snacks, fats and oils, frozen food, etc. When a packaged product is manufactured by filling and packaging, it is excellent in light shielding or light shielding while being aluminum-free, and has a gas barrier property that prevents permeation of oxygen gas and water vapor, and the penetration and permeation of components in the contents. It has excellent barrier properties, etc., has excellent heat seal properties, etc., and has strength, etc., and also has various properties such as weather resistance, heat resistance, water resistance, laminating strength, etc. Excellent robustness, for example, blocking the transmission of sunlight or fluorescence by the sun or fluorescent lamps, etc., blocking the transmission of oxygen gas and water vapor, and the contents are decomposed or altered, or discolored, etc. In addition, it prevents the deterioration of components such as photodegradation, prevents penetration and transmission of components in the contents, prevents contamination, coloring, etc. of the inner surface layer and intermediate layer constituting the laminated material. It has filling and packaging suitability, storage suitability, etc., in particular, it has extremely excellent usefulness as a packaging material for photosensitive materials as industrial members that require complete light shielding, and has excellent cosmetic properties without impairing the packaging appearance. In addition, it is useful for incineration disposal after use. The present invention finds that it is possible to produce a self-supporting bag that is extremely excellent in waste disposal suitability, environmental suitability, etc. without generating harmful substances, and that can easily detect metal pieces (foreign matter) using a metal detector or the like. Is completed.

  That is, the present invention comprises a multilayer structure comprising a white polyolefin resin layer, a gray light-shielding / barrier resin layer, and a transparent or translucent backside polyolefin resin layer sequentially laminated. The present invention relates to a laminated film.

The multilayer laminated film according to the present invention acts as a heat-sealable material as well as a light-shielding material, a barrier material, etc., is excellent in light-shielding properties while being aluminum-free, and transmits oxygen gas and water vapor. It has excellent gas barrier properties to prevent the penetration of components in the contents, barrier properties to prevent permeation of the contents, etc., and also has excellent heat seal properties, etc., and further has strength, etc., and weather resistance, Excellent fastness such as heat resistance, water resistance, laminating strength, etc. Especially, excellent in light blocking property, light blocking property, barrier property, etc., for example, transmission of sunlight or fluorescence by the sun or fluorescent lamp And prevents oxygen gas and water vapor from permeating, preventing the contents from being decomposed or altered, or causing photodegradation such as discoloration, etc. In particular, it has extremely excellent usefulness as a packaging material for photosensitive materials as industrial parts that require complete light shielding, and has excellent cosmetic properties without impairing the packaging appearance. It has the advantage that it does not generate harmful substances during processing, is extremely excellent in waste disposal suitability, environmental suitability, etc., and it is easy to detect a metal piece (foreign matter) by a metal detector or the like.
Thus, the multilayer laminated film according to the present invention is produced by laminating at least another base film and the like to produce laminated materials having various laminated structures, and using the laminated material. To produce a desired packaging bag, and then the packaging bag is filled with, for example, retort foods, snacks, fats and oils, frozen foods, etc. A packaged product can be manufactured.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
First, FIG. 1 and FIG. 2 are schematic sectional views showing two examples of the layer structure of the multilayer laminated film according to the present invention, and FIG. 3 uses the multilayer laminated film according to the present invention shown in FIG. FIG. 4 is a schematic cross-sectional view showing an example of the layer structure of the laminated material according to the present invention produced by using the laminated material according to the present invention shown in FIG. FIG. 5 is a schematic perspective view showing the outline of the configuration of the packaging bag according to the present invention, and FIG. 5 shows the configuration of the packaged product filled and packaged in the packaging bag according to the present invention shown in FIG. It is a schematic perspective view which shows the outline of this.

First, in the present invention, the multilayer laminated film according to the present invention will be described. The multilayer laminated film A according to the present invention includes, for example, a white polyolefin-based resin layer 1, a gray light-shielding and barrier as shown in FIG. The basic structure is composed of a coextruded laminated film 4 obtained by sequentially coextruding a transparent resin layer 2 and a transparent or translucent backside polyolefin resin layer 3.
In the present invention, another example of the multilayer laminated film according to the present invention is exemplified. The multilayer laminated film according to the present invention is, for example, as shown in FIG. 2, the multilayer according to the present invention shown in FIG. In the laminated film A, the interlayer between the white polyolefin-based resin layer 1 and the gray light-shielding / barrier resin layer 2 and the gray light-shielding / barrier resin layer 2 and a transparent or translucent backside polyolefin-based resin layer 3 illustrates a multilayer laminated film A _{1 according} to the present invention comprising a coextruded laminated film 4a obtained by sequentially coextruding and laminating adhesive polyolefin resin layers 5 and 5a between layers 3 and 3, respectively. Can do.

The above illustrations are examples of the layer structure of the multilayer laminated film according to the present invention, and it goes without saying that the present invention is not limited to these examples.
For example, although not shown, as the multilayer laminated film according to the present invention, for example, a transparent or translucent surface polyolefin resin layer can be provided on the above white polyolefin resin layer, if necessary. Further, a white polyolefin resin layer or the like can be laminated between the gray light shielding / barrier resin layer and the transparent or translucent back surface polyolefin resin layer.
In the multilayer laminated film according to the present invention, the adhesive polyolefin resin layer includes a white polyolefin resin layer and a gray light-shielding / barrier resin layer, and a gray light-shielding / barrier property. It is possible to intervene between the resin layer and the transparent or translucent backside polyolefin-based resin layer, and to firmly laminate these layers by closely adhering each other, and to prevent delamination or the like between the layers. Is.
Moreover, in the multilayer laminated film according to the present invention, although not shown, other resin compositions can be used depending on the intended purpose, application, etc., and a resin layer having other functions can be laminated. It is.

  By the way, the multilayer laminated film according to the present invention basically functions as a light-shielding material, a barrier material, and a heat-sealable material. Excellent gas barrier property that prevents the permeation of gas and water vapor or penetration of components in the contents, barrier property that prevents permeation, etc., also has excellent heat seal properties, etc. In addition, it is excellent in various fastnesses such as weather resistance, heat resistance, water resistance, laminating strength, etc., in particular, excellent in light-shielding properties or light blocking properties, such as sunlight or fluorescence by the sun or a fluorescent lamp, etc. It is excellent in gas barrier property that prevents permeation of oxygen gas and water vapor, or penetration of components in the content, barrier property that prevents permeation, etc., and the content is decomposed or altered, or is discolored, Prevents other photodegradation, etc., has contents filling and packaging suitability, storage suitability, etc., especially extremely useful as a packaging material for photosensitive materials as industrial members that require complete light shielding In addition, it has excellent cosmetics without impairing the packaging appearance, and is extremely excellent in waste disposal suitability, environmental suitability, etc. without generating harmful substances when incineration disposal after use. It has an advantage that it is easy to detect a metal piece (foreign material) by a metal detector or the like.

The multilayer laminated film according to the present invention will be described in more detail. In the multilayer laminated film according to the present invention, the white polyolefin-based resin layer is basically composed mainly of the gray light-shielding / barrier resin layer. It acts as a protective layer or concealing layer that protects or conceals etc., and a light shielding or light blocking layer that reflects or diffuses sunlight or fluorescent light from the sun or fluorescent lamps and blocks its transmission. Furthermore, when the white polyolefin resin layer is formed directly or indirectly on the printed pattern of, for example, a desired character, symbol, pattern, figure, or the like, a desired pattern constituting the printed pattern is formed. Acts as a base layer to sharpen printed patterns such as letters, symbols, patterns, figures, etc. The white polyolefin resin layer is a packaging material described later When forming the laminate as, or, when the bag making using this, for example, shea - heat forming a pole tip, etc. - tosylate - is intended to act as Le resin layer or the like.
Next, in the multilayer laminated film according to the present invention, the gray light-shielding / barrier resin layer basically works synergistically with the white polyolefin-based resin layer, and the sun or fluorescent lamp It acts as a light-blocking or light-blocking layer that absorbs sunlight or fluorescence, etc., and blocks its transmission, and also functions as a barrier resin layer. In the multilayer laminated film according to the present invention, the gray light-shielding / barrier resin layer is a gas barrier layer that blocks the permeation of oxygen gas and water vapor or a barrier that blocks the adsorption, penetration, and permeation of components in the contents. It acts as a sex layer.
Next, in the multilayer laminated film according to the present invention, the transparent or translucent backside polyolefin-based resin layer constitutes a laminated material as a packaging material to be described later, and when making a bag using this, for example, The polyolefin resin constituting the polyolefin resin layer acts as a heat-sealable resin layer or the like that forms a seal part by melting and fusing together by the action of heat.
Thus, since the multilayer laminated film according to the present invention is aluminum-free, it does not generate harmful substances during incineration disposal after use, and is extremely excellent in disposal disposal suitability, environmental suitability, etc. In addition, it has the advantage of facilitating the inspection of metal pieces (foreign matter) using a metal detector or the like.

  Next, in the present invention, the laminated material according to the present invention manufactured using the multilayer laminated film according to the present invention as described above will be described. As the laminated material, as shown in FIG. In the case where the multilayer laminated film A according to the present invention shown in FIG. 1 is used, first, for example, a desired character, symbol, pattern, figure, etc. 1 is formed on the surface of the base film 11 including the printed pattern layer 12, and the white laminated film A constituting the multilayer laminated film A according to the present invention shown in FIG. The laminated material B according to the present invention manufactured using the multilayer laminated film A according to the present invention can be manufactured by laminating the polyolefin resin layer 1 so that the surfaces thereof are opposed to each other.

In FIG. 3, the meanings of reference numerals 1, 2, 3, 4, A, etc. represent the same meaning as the reference numerals 1, 2, 3, 4, A, etc. in FIG.
The above illustration is an example of the laminated material according to the present invention as a packaging material manufactured using the multilayer laminated film according to the present invention, and the present invention is not limited thereto. There is nothing.
For example, although not shown in the drawings, the laminated material according to the present invention has, for example, other barrier substrates, other substrates, etc., depending on the contents to be filled and packaged, its packaging purpose, packaging form, etc. The laminates according to the present invention having various forms can be produced by arbitrarily laminating materials.
Although not shown, instead of forming a printed pattern layer or the like on the back surface of the base film as described above, a desired character is applied to the surface of the white polyolefin resin layer or the like constituting the multilayer laminated film according to the present invention. A book using the multilayer laminated film according to the present invention, after forming a printed pattern layer composed of symbols, patterns, figures, etc., and then laminating a base film on the surface including the printed pattern layer The laminated material according to the invention can also be manufactured.

  In addition, in the above, as a laminating method for laminating at least the base film and the multilayer laminated film according to the present invention, for example, a laminating adhesive layer with a laminating adhesive or the like is provided, and then A dry laminating lamination method in which at least the base film and the multilayer laminated film according to the present invention are laminated via the laminating adhesive layer, or an adhesion assistant layer by an anchor coating agent or the like. A melt-extruded resin layer, etc., and then at least a base film and a multilayer laminated film according to the present invention through an adhesion assistant layer, a melt-extruded resin layer, etc. by the anchor coat agent. It can carry out by the melt extrusion lamination system etc. which laminate.

  Next, in the present invention, an example of the packaging bag according to the present invention, which is produced by using the laminated material according to the present invention as described above, and manufacturing the bag, will be described. As the packaging bag, for example, the case of a packaging bag made using the laminated material B according to the present invention shown in FIG. 3 will be described. As shown in FIG. Two sheets of the laminated material B according to the present invention are used, and the multilayer laminated films A and A according to the present invention constituting the two laminated materials B and B are overlapped to face each other, -The opposite surfaces of the multilayer laminated films A and A according to the present invention as the seal material are heat sealed at the outer periphery and the side seal portions 21, 21 and the bottom seal, respectively. And the opening 23 is formed on the upper side to form the product according to the present invention. Way according to the present invention described bag-making using wood B sheet - in which it is possible to manufacture the bag C for Le-type packaging.

Thus, in the present invention, as shown in FIG. 5, the three-way seal type packaging bag C according to the present invention produced as described above is used, and the boiled retort food, for example, is opened from the opening 23 thereof. Food and drinks such as snacks, fats and oils, frozen foods, etc., and other contents 24 are filled, then the opening 23 is heat sealed, and the upper heat sealing part 25, the packaged product D according to the present invention manufactured using the packaging bag C according to the present invention can be manufactured.
The above exemplification is an example of the packaging bag according to the present invention and the packaged product using the same, and the present invention is not limited thereto, for example, as a form of the packaging bag. Although not shown, for example, a pillow packaging form, a gusset packaging form, a standing (self-supporting) pouch packaging form, and other packaging bag forms suitable for the contents can be taken.

Next, in the present invention, the multilayer laminated film, the laminated material, the packaging bag, the material constituting the packaged product, the manufacturing method, etc. according to the present invention as described above will be described. First, in the present invention, the present invention The multilayer laminated film according to the present invention will be described. First, the white polyolefin resin layer constituting the multilayer laminated film according to the present invention contains, for example, a polyolefin resin as a main component, further contains a white pigment, and is white. The white polyolefin resin layer according to the present invention may be formed using a resin composition having a pigment content of 0.5 wt% to 30.0 wt% with respect to the polyolefin resin. it can.
Next, the gray light-shielding and barrier resin layer constituting the multilayer laminated film according to the present invention is, for example, a barrier resin that blocks permeation of oxygen gas and water vapor, or the penetration of components in the contents, It contains a barrier resin that prevents permeation as a main component, and further contains a black pigment and a white pigment, and the content of the black pigment is 0.1 wt% to 20.0 wt% with respect to the barrier resin. In addition, the gray light-shielding barrier resin layer according to the present invention is formed using a resin composition having a white pigment content of 1 to 30 times the black pigment content. can do.

Furthermore, in this invention, the transparent thru | or translucent back surface polyolefin resin layer which comprises the multilayer laminated film which concerns on this invention uses the resin composition which contains polyolefin resin as a main component, for example, and relates to this invention. A transparent or translucent backside polyolefin resin layer can be formed.
In the present invention, the adhesive polyolefin-based resin layer constituting the multilayer laminated film according to the present invention uses, for example, a resin composition containing an adhesive polyolefin-based resin as a main component, and the adhesive property according to the present invention. A polyolefin resin layer can be formed.

  In the above, the polyolefin resin forming the white polyolefin resin layer, the transparent or translucent backside polyolefin resin layer, etc. constituting the multilayer laminated film according to the present invention is melted by heat and extruded from a T die or the like. Possible polyolefin-based resin, specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene-α / olefin copolymerized using metallocene catalyst Polymer, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene Polyolefins such as polymers, polyethylene and polypropylene 1 of polyolefin resins having heat seal properties such as acid-modified polyolefin resins modified with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc. Species or two or more can be used.

Thus, in the present invention, the polyolefin resin further includes ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene. It is preferable to use a polyethylene resin such as a copolymer with α-olefin such as 1-nonene, 1-decene, etc.
In the present invention, as the polyethylene resin, specifically, a copolymer of ethylene and 1-octene is preferably used from the viewpoint of the melt tension property of the polyethylene resin.
As the copolymer of ethylene and 1-octene, the melt flow rate (MFR) is in the range of 0.1 to 4.0 g / 10 min, and the density is 0.900 to 0.930 g. Those within the range of / cm ³ can be used.
In the above, if the melt flow rate (MFR) is less than 0.1 g / 10 min, it is not preferable because it causes an increase in resin pressure and causes the machine (film forming machine) to stop, and the melt flow rate ( If MFR) exceeds 4.0 g / 10 min, it is not preferable because the top blown inflation film formation becomes difficult. In addition, in the above, if the density is less than 0.900 g / cm ^3, it is not preferable because of a decrease in the stiffness (rigidity) of the entire multilayer laminated film, and the density is 0.930 g / cm ³ . On the other hand, it is not preferable because of lack of suitability as a heat seal layer (heat seal material).

In the present invention, it is also preferable to use a polypropylene resin such as a propylene homopolymer or a copolymer (copolymer) of propylene and an α-olefin such as ethylene as the polyolefin resin. It is.
In addition, as said polypropylene resin, the block copolymer (copolymer) or the random copolymer (copolymer) is used especially, Furthermore, the random copolymer (copolymer) is used. Is preferable.
Thus, in the present invention, it is preferable to use a polypropylene resin that is excellent in melt tension, stretchability, etc., and has an inflation molding suitability described later, specifically, a polypropylene resin. It is preferable to use those in which long chain branching is introduced into the main chain and the tension in the molten state is increased.
In the present invention, specifically, as a polypropylene resin excellent in melt tension and stretchability, a polypropylene resin composed of a block or random copolymer of propylene and ethylene or propylene and 1-octene is used. Is preferred.
Thus, in the polypropylene resin composed of a block or random copolymer of propylene and ethylene or propylene and 1-octene, the density is about 0.9 [g / cm ³ ]. The rate (MFR) is in the range of about 0.1 to 2.0 [g / 10 min], and the melt tension is in the range of 100 [mN] or more (10 [cN] or more). Can be used.
Further, in the above, when the melt flow rate (MFR) is less than 0.1 [g / 10 minutes], the resin pressure increases during resin extrusion, giving a large load to the film forming machine, etc. Those exceeding 2.0 [g / 10 min] are not suitable for the top blowing inflation film formation method and are not preferred because they do not blow upward. Furthermore, in the above, when the melt tension is less than 100 [mN] (less than 10 [cN]), it is not preferable because it is not suitable for the top blown inflation film forming method.

Next, in the present invention, the barrier resin forming the gray light-shielding / barrier resin layer constituting the multilayer laminated film according to the present invention has a property of blocking or preventing permeation of oxygen gas or water vapor. Barrier resins such as polyvinylidene chloride resin, polyvinyl alcohol resin, ethylene-vinyl alcohol copolymer, nylon MXD6 resin, etc. can be used.
Thus, in the present invention, the barrier resin is a resin that can be melted by heat and coextruded with the polyolefin resin, specifically, an ethylene-vinyl alcohol copolymer or a nylon MXD6 resin. Is preferably used.
In the present invention, the barrier resin that forms the gray light-shielding / barrier resin layer constituting the multilayer laminated film according to the present invention has a property of preventing adsorption, penetration, permeation, etc. of components in the contents. For example, nylon 6 resin, nylon 11 resin, nylon 12 resin, nylon 66 resin, nylon 46 resin, nylon 610 resin, nylon 612 resin, aromatic polyamide resin, nylon 6 (85%) and nylon 66 Copolymers with (15%), etc. can be used.
Thus, in the present invention, the barrier resin is a resin that can be melted by heat and coextruded with the above-mentioned polyolefin resin, specifically, nylon 6 (85%) and nylon 66 (15%). It is preferable to use a copolymer.
Specific examples of the copolymer of nylon 6 (85%) and nylon 66 (15%) include Ube Industries, Ltd. trade names, UBE NYLON 5034B, UBE NYLON 5033B, and the like. It is preferable.
In the present invention, the barrier resin having the property of blocking or blocking the permeation of oxygen gas or water vapor as described above, of course, has the property of blocking the adsorption, penetration, permeation, etc. of the components in the contents. Is.

In the present invention, as the adhesive polyolefin-based resin for forming the adhesive polyolefin-based resin layer constituting the multilayer laminated film according to the present invention, basically, the aforementioned polyolefin-based resin can be used in the same manner. It can be done.
Thus, in the present invention, in particular, among the above polyolefin resins, a resin that melts by heat and has adhesion to the polyolefin resin and the barrier resin, specifically, the above polyolefin resins. Among resins, for example, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, polyethylene resin or polypropylene resin, etc. Heat-treated polyolefin-based resins modified with unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, maleic acid, itaconic acid, etc. It is preferable to use one type or two or more types of polyolefin resins having properties.

Next, in the present invention, as the black pigment forming the gray light-shielding / barrier resin layer constituting the multilayer laminated film or the like according to the present invention, for example, sunlight or fluorescent light composed of the sun or a fluorescent lamp is used. Absorbs (mainly absorbs the visible region from the near ultraviolet), blocks or blocks its transmission, and prevents degradation or alteration of the contents filled in the packaging bag, or light deterioration such as discoloration, etc. Specifically, for example, it is desirable to use one kind or a mixture of two or more kinds of colorants such as various black type inorganic or organic dyes and pigments.
In the present invention, examples of colorants such as various black inorganic and organic dyes and pigments include iron black, graphite or carbon black, and electrically conductive materials (polyaniline, polypyrrole). -1) or 2 or more types of black pigments such as other can be used.
Therefore, in the present invention, the carbon black as the black pigment is a carbon black as a special pigment of benzpyrene free which avoids the incorporation of benzpyrene, which has recently been pointed out to be carcinogenic. Is preferably used.
In the present invention, the black pigment is used in an amount of about 0.1 wt% to 20.0 wt%, preferably 0.3 wt% to 10.0 wt%, relative to the polypropylene resin forming the resin composition. It is desirable to add about%.

Next, in the present invention, examples of the white pigment forming the white polyolefin resin layer or the gray light-shielding / barrier resin layer constituting the multilayer laminated film according to the present invention include, for example, the sun or fluorescent lamps. Reflects or diffuses sunlight or fluorescent light, etc., and blocks or blocks its transmission, preventing degradation or alteration of the contents filled in the packaging bag, or light deterioration such as discoloration, etc. Specifically, for example, it is desirable to use a mixture of one or two or more colorants such as various inorganic and organic dyes and pigments of white type.
In the present invention, the above-mentioned various colorants such as white inorganic and organic dyes and pigments include, for example, basic lead carbonate, basic lead sulfate, basic lead silicate, zinc white, sulfide. One or more of white pigments such as zinc, lithopone, antimony trioxide, anatase-type titanium oxide, rutile-type titanium oxide, calcium carbonate, zinc oxide, barium sulfate, etc. can be used.
Thus, the amount of the white pigment used is preferably about 1 to 30 times the content of the black pigment when forming the gray light-shielding / barrier resin layer. Is added to the polyolefin resin forming the resin composition in an amount of about 0.5 to 30.0% by weight, preferably about 3.0 to 20.0% by weight. It is desirable to use.

  Next, in the present invention, each resin composition constituting the multilayer laminated film according to the present invention will be described in more detail. First, in the present invention, a white polyolefin resin layer constituting the multilayer laminated film according to the present invention is provided. As the resin composition to be formed, for example, one or more of the above polyolefin resins are used as the main component of the vehicle, and one or more of the above white pigments are added thereto, and the above Is added at a blending ratio of about 0.5 wt% to 30.0 wt%, preferably about 5.0 wt% to 20.0 wt%, and if necessary, When forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties , Improve strength, etc., 1 to 2 or more of various plastic compounding agents and additives are optionally added for the purpose of quality control, and further, if necessary, a solvent, a diluent and the like are added and kneaded sufficiently to obtain the present invention. The resin composition which forms the white polyolefin resin layer concerning this can be prepared.

  Next, as the resin composition for forming the gray light-shielding and barrier resin layer constituting the multilayer laminated film according to the present invention, for example, a barrier resin that blocks or prevents the permeation of oxygen gas or water vapor, or One or more barrier resins that prevent adsorption, permeation, permeation, etc. of components in the contents are the main component of the vehicle, and one or more of the above black pigments and the above white color are included. 1 type or 2 types or more of pigments are added, and the content of the black pigment is about 0.1 wt% to 20.0 wt%, preferably 0.3 wt% with respect to the barrier resin. % To 10.0% by weight, and the white pigment content is 1 to 30 times, preferably 3 to 15 times the black pigment content. Add in proportion, and if necessary, film formation On the other hand, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, For the purpose of improving and modifying others etc., one or more kinds of various plastic compounding agents and additives are arbitrarily added, and if necessary, a solvent, a diluent, etc. are added sufficiently. By kneading, a resin composition for forming the gray light-shielding and barrier resin layer according to the present invention can be prepared.

  Moreover, in this invention, as a resin composition which forms the transparent thru | or translucent back surface polyolefin resin layer which comprises the multilayer laminated film which concerns on this invention, for example, 1 type or 2 types or more of said polyolefin resin is included. As the main component of the vehicle, and further, if necessary, when forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, release properties, etc. For the purpose of improving and modifying the formability, flame retardancy, antifungal properties, electrical properties, strength, etc., one or more kinds of various plastic compounding agents and additives are arbitrarily added, Furthermore, if necessary, a resin composition for forming a heat-sealable resin layer according to the present invention can be prepared by adding a solvent, a diluent and the like and kneading sufficiently.

In the present invention, as the resin composition for forming the adhesive polyolefin resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above-mentioned adhesive polyolefin resins can be used as a vehicle. For example, film processing, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slipperiness, releasability, etc. In order to improve and improve flame retardancy, antifungal properties, electrical characteristics, strength, etc., one or more kinds of various plastic compounding agents and additives are optionally added, If necessary, a resin composition for forming the adhesive polyolefin resin layer according to the present invention can be prepared by adding a solvent, a diluent, and the like and kneading the mixture sufficiently.
In the present invention, in each resin composition constituting the multilayer laminated film according to the present invention, examples of the plastic compounding agent and additive include a lubricant, a crosslinking agent, an antioxidant, and an ultraviolet absorber. , Light stabilizers, fillers, reinforcing agents, antistatic agents, flame retardants, flame retardants, foaming agents, antifungal agents, pigments, dyes, dispersants, surfactants, antiblocking agents, etc. Further, a modifying resin or the like can be used, and the addition amount can be arbitrarily added from a very small amount to several tens of weight% depending on the purpose.

Furthermore, in the above, as the compounding agent or additive, specifically, a lubricant having its own lubricity and little migration in the resin can be used. For example, liquid paraffin, white Vaseline, petroleum wax, microcrystalline wax, montan wax, polyethylene wax and the like, higher fatty acids having 8 to 22 carbon atoms, or higher fatty acid aluminum, higher fatty acid calcium, higher fatty acid magnesium higher fatty acid zinc, higher fatty acid lithium Higher fatty acids or metal salts thereof, linear aliphatic monohydric alcohols having 8 to 18 carbon atoms, glycerin, sorbitol, propylene glycol, pentaerythritol, triethylene glycol, etc. Aliphatic alcohols, higher fatty acids having 4 to 22 carbon atoms and straight chain aliphatics having 8 to 18 carbon atoms Esters with polyhydric alcohols, butyl acetyl citrate, di-2-ethyl-hexyl adipate, azelaic acid-n-hexyl, ethanediol montanate, poly (1.3-butanediol adipate) ester, acetylricino Methyl ester, poly (1.3-butylene glycol, 1.4-butylene glycol, octyl alcohol adipate) ester, ester of sugar sugar and fatty acid ester, hydrogenation Edible oils and fats, castor oil, spam acetyl wax, glycerides of acetylated monoglyceride sugar, ethylene bis-fatty acid amide represented by, for example, ethylene bisoleyl amide having 16 to 18 carbon atoms, higher fatty acid amide having 8 to 22 carbon atoms , Stearyl erucamide, erucic acid amide, oleyl palmitoamide, etc. 1 to 2 types of fatty acid amides, and other types such as methylhydrodiene polysiloxane, dimethyl polysiloxane, methylphenyl polysiloxane, silicone oil jarodine such as polyoxyalkylene dimethylpolysiloxane, and glycerin ester of maleic acid modified rosin The above can be used.
In the present invention, among the lubricants as described above, in particular, erucic acid amide, ethylene bis oleyl amide, stearic acid amide, oleic acid amide, methylene bis stearic acid amide, etc. themselves have lubricity, It is a very effective material.
As the addition amount of the above-mentioned lubricant, it is preferable to add at a ratio of about 0.08 wt% to 10.0 wt% with respect to 100 parts by weight of the polyolefin resin, barrier resin, or adhesive polyolefin resin. It is.

In the present invention, other oxides such as aluminum oxide, magnesium oxide, silica, calcium oxide, titanium oxide, and zinc oxide; hydroxides such as aluminum hydroxide, magnesium hydroxide, and calcium hydroxide; Carbonates such as magnesium and calcium carbonate, sulfates such as calcium sulfate and barium sulfate, silicates such as magnesium silicate, aluminum silicate, calcium silicate and aluminosilicate, and others such as kaolin, talc and diatomaceous earth Anti-blocking agent based on inorganic compounds, or high density polyethylene, ultra-high molecular weight polyethylene having a molecular weight of 300000 or more, polypropylene, polycarbonate, polyamide, polyester, melamine resin, diallyl phthalate resin, acrylic resin, etc. Organic consisting of fine powder It one free of compounds based antiblocking agents can be added two or more.
The addition amount is preferably about 0.01 to 3% by weight based on 100 parts by weight of the polyolefin resin, barrier resin, or adhesive polyolefin resin.

  Next, in the present invention, a method for producing a multilayer laminated film according to the present invention using each resin composition as described above will be described. First, in the present invention, each resin composition is as described above. Then, the resin composition is used, and then the resin composition is co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, etc. The multilayer laminated film according to the invention can be produced.

  Thus, in the present invention, a specific method for producing a multilayer laminated film according to the present invention using each of the resin compositions as described above will be described. In the present invention, first, as described above, A resin composition for forming a white polyolefin resin layer according to the invention, a resin composition for forming a gray light-shielding / barrier resin layer according to the present invention, and a transparent or translucent backside polyolefin system according to the present invention A resin composition for forming a resin layer is prepared, and then the three kinds of resin compositions are used. These are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, or the like. The first layer is a white polyolefin-based resin layer, the second layer is a gray light-shielding / barrier resin layer, and the third layer is transparent or molded. Translucent polyolefin It is possible to manufacture a multilayer laminated film composed of three-kind, three-layer according to the present invention comprising the sequential three-layer co-extruded structure of the laminated coextruded multilayer laminate film in this order fin-based resin layer.

  Alternatively, in the present invention, first, as described above, the resin composition for forming the white polyolefin resin layer according to the present invention and the resin composition for forming the gray light-shielding and barrier resin layer according to the present invention. And a resin composition for forming the transparent or translucent backside polyolefin resin layer according to the present invention and a resin composition for forming the adhesive polyolefin resin layer according to the present invention. These resin compositions are used, and these are co-extruded using, for example, a T-die co-extruder, an inflation co-extruder, etc., and are formed of the multilayer laminated film according to the present invention. One layer is a white polyolefin resin layer, the second layer is an adhesive polyolefin resin layer, the third layer is a gray light-shielding / barrier resin layer, the fourth layer is an adhesive polyolefin resin layer, The fifth layer Transparent or semi-transparent sequentially multilayered film comprising four 5-layer according to the present invention having the structure of co-extruded multi-layer laminate films 5 layer coextrusion laminated in this order polyolefin resin layer can be manufactured.

The above illustration is an example of the method for producing a multilayer laminated film according to the present invention, and the present invention is not limited to this.
In general, when each of the resin compositions as described above is used to co-extrusion film formation of the multilayer laminated film according to the present invention, for example, product replacement (page) Occasionally, operations such as disassembly and cleaning of an extruder or the like are loaded, so it is desirable to avoid the use of a colorant such as a pigment in the resin composition, and it is desired to form a colorant-free film. Is.
Therefore, in the present invention, as an outer layer, in order to form a laminated film in which contamination due to the colorant such as the pigment does not occur in a die that is difficult to disassemble, although the contamination due to the colorant such as the pigment of the extruder is not avoided Using a transparent or translucent resin composition to which no colorant such as pigment is added, thereby making the resin film without the addition of colorant such as pigment 5 μm to 100 μm, thereby protecting the dirt on the die It has the advantage that.
Further, in the present invention, as the multilayer laminated film according to the present invention, other materials are used depending on the purpose of use, applications, etc., and these are arbitrarily co-extruded to form a co-extruded multilayer having various forms. A laminated resin film can be designed and manufactured.

Thus, in the present invention, the white polyolefin resin layer and the gray light-shielding / barrier resin layer as described above absorb sunlight or the like in one layer and sunlight in the other layer. Reflecting or diffusing etc., the synergistic effect of the two layers completely blocks or blocks the transmission of sunlight or fluorescent light from the sun or fluorescent lamps, etc. This enhances the effect of further preventing light degradation such as decomposition or alteration, or fading or others.
In the present invention, the white polyolefin-based resin layer acts as a protective layer for protecting the gray light-shielding / barrier resin layer or the like, or as a concealing concealing layer, so that the appearance beauty of the packaged product, etc. It is possible to achieve the effect of achieving the above.
Furthermore, in the present invention, the white polyolefin-based resin layer has a function of a base layer of a printed pattern layer directly or indirectly provided on the white polyolefin resin layer, and the characters constituting the printed pattern layer , Graphics, symbols, designs, and other printed images can be made clearer and beautiful printed patterns can be reproduced or manifested, and the white polyolefin resin layer can be used for other substrates. When laminating a film or the like, it is possible to achieve an effect of having a function as a heat-seal resin layer.
In the present invention, the barrier resin layer has an action of blocking or blocking permeation of oxygen gas, water vapor, etc. or an action of blocking adsorption, penetration, permeation, etc. of components in the contents. As a result, the quality of the contents can be maintained and the deterioration can be prevented.
Furthermore, in the present invention, the transparent or translucent backside polyolefin-based resin layer functions as a protective layer for protecting the gray light-shielding / barrier resin layer or the like, or a concealing layer for concealing. Moreover, the effect of having the function as a heat-sealable resin layer for forming a seal part or the like at the time of bag making or the like can be achieved.

Next, in the present invention, the film thickness of the multilayer laminated film according to the present invention is about 20 μm to 210 μm, preferably about 30 μm to 150 μm.
Thus, in the multilayer laminated film according to the present invention, as the film thickness of each layer constituting the multilayer laminated film, first, as the white polyolefin resin layer, the film thickness is 3 μm to 30 μm, preferably 5 μm to 20 μm. As the gray light-shielding and barrier resin layer, the film thickness is 5 μm to 30 μm, preferably about 10 μm to 20 μm, and the transparent or translucent backside polyolefin resin layer is 5 μm to 100 μm, preferably The adhesive polyolefin resin layer having a thickness of about 10 μm to 80 μm preferably has a thickness of about 5 μm to 30 μm, preferably about 10 μm to 20 μm.
In the above, as the film thickness of each layer constituting the co-extruded laminated resin film according to the present invention, first, the film thickness of the white polyolefin-based resin layer is less than 3 μm. It becomes difficult to conceal the layer, and the appearance and aesthetics are deteriorated. When a printed pattern layer is provided on the white polyolefin resin layer, the gradation or tone of the printed pattern layer, etc. Is unfavorable for reasons such as being affected, and further, the function as a heat-sealable resin layer or the like is reduced, and if the film thickness exceeds 30 μm, a gray light-shielding and barrier resin layer Although the concealability and the like are increased, the overall thickness is increased, and this is not preferable because of the possibility that the influence on the environment as packaging waste or the like may increase.
Next, as the film thickness of the gray light-shielding line barrier resin layer, if the film thickness is less than 5 μm, the function as a light-shielding or light-blocking layer, or a barrier layer is lowered, It is not preferable because it may cause the problem of being greatly affected by thickness unevenness. If the film thickness exceeds 30 μm, the light shielding property, light blocking property, barrier property, etc. will be increased, but it is concealed. For example, it is not preferable because the setting, selection and the like of the white polyolefin resin layer to be performed are difficult.
In addition, the film thickness of the transparent or translucent backside polyolefin resin layer is less than 5 μm because the heat sealability is inferior, and when it exceeds 100 μm, the film thickness is increased and wasteful. It is not preferable.

As is clear from the above description, the multilayer laminated film according to the present invention acts as a heat-sealable material as well as a light-shielding material, a barrier material, etc., and is excellent in light-shielding property while being aluminum-free. In addition, it has excellent gas barrier properties that prevent the permeation of oxygen gas and water vapor, or barrier properties that prevent the adsorption, penetration, permeation, and the like of components in the contents, etc., and is excellent in heat seal properties, Furthermore, it has strength and the like, and is excellent in various fastnesses such as weather resistance, heat resistance, water resistance, laminating strength, etc., in particular, excellent in light shielding properties, light blocking properties, barrier properties, etc. Blocks the transmission of sunlight or fluorescent light from the sun or fluorescent lamps, prevents the contents from being decomposed or altered, or causing light deterioration such as discoloration, etc. Preservability etc. In particular, it has excellent usefulness as a packaging material for photosensitive materials as industrial members that require complete light shielding, and has excellent cosmetic properties without impairing the packaging appearance, and is disposed of by incineration after use. In this case, there is an advantage that it is extremely excellent in disposal processing suitability, environmental suitability, etc. without generating harmful substances, etc., and it is easy to detect a metal piece (foreign matter) by a metal detector or the like.
Thus, the multilayer laminated film according to the present invention is used as a light-shielding or light-shielding material, a barrier material or a heat-sealable material, and other substrates such as a plastic film. 1 type or 2 types or more of various base films such as paper base materials, other barrier base materials that prevent permeation of oxygen gas or water vapor, cellophane, woven or non-woven fabric, glass plates, etc. Laminate to produce laminated materials of various forms, and thus make the laminated material into bags to apply to packaging materials that make up packaging bags of various forms, etc. It is possible.

  Next, in the present invention, the laminated material according to the present invention as a packaging material using the multilayer laminated film according to the present invention will be described in more detail. First, as a method for producing the laminated material, for example, A dry lamination method in which a desired base film such as a plastic film is arbitrarily laminated via a primer layer or a laminating adhesive layer, etc., or a primer layer or an anchor coat Manufacture laminates in various forms using an extrusion laminating method in which various desired resins are laminated by melting and extruding various resins through an agent layer, etc., and other laminating methods can do.

Thus, in the present invention, the base film constituting the laminated material according to the present invention will be described. As such a base film, this is the basic or auxiliary material that constitutes the packaging bag according to the present invention. Therefore, it has excellent properties in mechanical, physical, chemical, etc., excellent in strength, toughness, etc., and further, heat resistance, moisture resistance, pinhole resistance, puncture resistance, A resin film or sheet excellent in transparency, etc. can be used.
Specifically, for example, polyester resins, polyamide resins, polyaramid resins, polyethylene resins, polypropylene resins, polycarbonate resins, polyacetal resins, fluorine resins, and the like. Resin films or sheets can be used.
Thus, as the resin film or sheet, any of an unstretched film or a stretched film stretched in a uniaxial direction or a biaxial direction can be used.
In the present invention, the thickness of the resin film or sheet may be a thickness that can be kept to the minimum necessary for strength, puncture resistance, rigidity, and the like. On the other hand, if it is too thin, the strength, puncture resistance, rigidity, etc. are lowered, which is not preferable.
In the present invention, for the above reasons, it is most desirable that the thickness is about 10 μm to 100 μm, preferably about 12 μm to 50 μm.
Thus, in the present invention, among the above-described resin films or sheets, in particular, a biaxially stretched polyester resin having a thickness of about 9 to 30 μm, a biaxially stretched polyamide resin, or a biaxial It is preferable to use a stretched polypropylene resin film.

Furthermore, in the present invention, as the base film to be laminated with the multilayer laminated film according to the present invention, in addition to the base film as described above, for example, it has moldability, bending resistance, rigidity, etc. For example, a paper substrate such as a highly sized bleached or unbleached paper substrate, or a pure white roll paper, kraft paper, paperboard, processed paper, or the like can be laminated.
In the above, as the paper substrate constituting the paper layer, it is desirable to use a material having a basis weight of about 80 to 600 g / m ² , preferably a basis weight of about 100 to 450 g / m ² .
Of course, in the present invention, the paper base material constituting the paper layer and various resin films or sheets as the base film mentioned above can be used in combination.

Next, in the present invention, as the other base film laminated with the multilayer laminated film according to the present invention, for example, the property of shielding light such as sunlight, or gas such as water vapor, water, oxygen, etc. It is possible to use a material having a property that does not pass through, etc., and the like, and this may be a single base material or a composite base material formed by combining two or more base materials.
Specifically, for example, a resin film having a deposited film of an inorganic oxide such as silicon oxide or aluminum oxide having a barrier property, low density polyethylene having a barrier property such as water vapor or water, medium density polyethylene, high density Films or sheets of resin such as polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, nylon MXD6, etc. Various resin films or sheets having light-shielding properties obtained by adding a colorant such as a pigment to the resin and kneading the resin with a desired additive and kneading into a film. Can be used.
These materials can be used alone or in combination. The thickness of the film or sheet is arbitrary, but is usually about 5 μm to 300 μm, more preferably about 10 μm to 100 μm.

Further, in the above, a deposited film of inorganic oxide having a thickness of about 100 to 2000 mm can be used.
Examples of the resin film that supports the vapor-deposited film include a polyester film, a polyamide film, a polyolefin film, a polyvinyl chloride film, a polycarbonate film, a polyvinylidene chloride film, a polyvinyl alcohol film, and ethylene-acetic acid. A vinyl copolymer saponified film, etc. can be used.

In the above, as the inorganic oxide constituting the vapor-deposited film layer of the inorganic oxide, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide or the like may be used. it can.
Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide.
Thus, in the present invention, the thin film layer of the inorganic oxide is formed by forming a deposited film by a vacuum deposition method such as an ion beam method or an electron beam method, a sputtering method, or the like. be able to.
In the above, the thickness of the thin film layer of the inorganic oxide is usually preferably about 100 to 2000 mm in order to obtain a sufficient barrier property, and particularly preferably about 200 to 1500 mm in the present invention. .
In the above, when the thickness of the inorganic oxide thin film layer exceeds 1500 mm, particularly when it exceeds 2000 mm, the inorganic oxide thin film layer is liable to crack and the like, thereby reducing the barrier property. It is not preferable because it has the problem that the material cost is high, and it is not preferable, and if it is less than 100 mm, particularly less than 200 mm, it is difficult to recognize the effect, which is not preferable.

Next, in the present invention, as the other base film laminated on the multilayer laminated film according to the present invention, there is little adsorption of a fragrance component and the like contained in the contents to be packed and packed, and the aroma retention is further enhanced. A resin film or sheet having a property that does not cause a taste change or a strange odor can be used.
Specifically, for example, polyacrylic resin, polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or the like Resin obtained by copolymerizing or modifying a part of ethylene component and / or terephthalate component with other di- or higher polyalcohol component or dicarboxylic acid component, or polyester such as polyethylene naphthalate resin Use films or sheets of resins such as resins, polyamide resins, saponified ethylene-vinyl acetate copolymers, polyvinyl alcohol resins, polyvinyl chloride resins, polyvinylidene chloride resins, etc. Can do.
Therefore, in the present invention, among the above-described resin films or sheets, it is desirable to use a resin film or sheet having a fragrance retaining property and a barrier property against oxygen gas or water vapor. Specifically, for example, a saponified ethylene-vinyl acetate copolymer, a polyamide-based resin, a polyacrylonitrile-based resin, a polyester-based resin, or the like is used as a resin film or a film having excellent aroma retention and barrier properties. -It is desirable to use

Furthermore, in the present invention, since the packaging container is usually subjected to severe physical and chemical conditions, the packaging material constituting the packaging container is required to have severe packaging suitability, Various conditions such as anti-deformation strength, drop impact strength, pinhole resistance, heat resistance, sealing performance, quality maintenance, workability, hygiene, and the like are required. A material that satisfies the various conditions as described above can be arbitrarily selected and used.
Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid Ethyl copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer Polymer, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, Polyamide resin, polycarbonate Known resins such as neat resins, polyvinyl alcohol resins, saponified ethylene-vinyl acetate copolymers, fluorine resins, diene resins, polyacetal resins, polyurethane resins, nitrocellulose, etc. Any resin film or sheet can be selected and used.
In addition, for example, a film such as cellophane, a synthetic paper, or the like can be used.
In the present invention, the above-described film or sheet may be any of unstretched, uniaxially or biaxially stretched.
The thickness is arbitrary, but can be selected from a range of several μm to 300 μm.
Furthermore, in the present invention, the film or sheet may be a film having any property such as extrusion film formation, inflation film formation, and coating film.

In the present invention, in the laminated material according to the present invention, an arbitrary printed pattern layer can be provided on the front surface, the back surface, or both surfaces of any material constituting the laminated material.
Thus, in the present invention, as the printed pattern layer, for example, a desired printed pattern made of, for example, characters, figures, symbols, patterns, etc. is printed on the substrate film, A printed pattern layer can be formed.
Thus, as the above-mentioned printed pattern layer, specifically, first, an ink vehicle composed of one or more kinds of resin or the like is a main component, and if necessary, a plasticizer and a stabilizer. , One or more additives such as antioxidants, light stabilizers, ultraviolet absorbers, curing agents, cross-linking agents, lubricants, antistatic agents, fillers, etc. are optionally added, and further dyes, A colorant such as a pigment is added, and the ink composition is prepared by sufficiently kneading with a solvent, a diluent, etc., and then the ink composition is used, for example, gravure printing, offset printing, letterpress printing, screen printing A desired printing pattern consisting of characters, figures, symbols, patterns, etc. is printed on the base film using a printing method such as printing, transfer printing, flexographic printing, etc. The printed pattern layer can be formed

  In the above, as the vehicle for ink, known ones such as sesame oil, drill oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenol resin, malein Acid resins, natural resins, hydrocarbon resins, polyvinyl chloride resins, polyvinyl acetate resins, polystyrene resins, polyvinyl butyral resins, acrylic or methacrylic resins, polyamide resins, polyester resins, polyurethane resins Use one or more of epoxy resin, urea resin, melamine resin, amino alkyd resin, phenol resin, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, etc. Can do.

Next, in the present invention, the laminating adhesive layer constituting the laminated material according to the present invention will be described. As the laminating adhesive layer constituting the laminating adhesive layer, for example, poly A vinyl acetate adhesive, a homopolymer such as ethyl acrylate, butyl, 2-ethylhexyl ester, or a polyacrylate adhesive composed of a copolymer of these with methyl methacrylate, acrylonitrile, styrene, etc., Cyanoacrylate adhesives, ethylene copolymer adhesives consisting of copolymers of ethylene and vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, etc., cellulose adhesives, polyester adhesives Agent, polyamide adhesive, polyimide adhesive, amino resin adhesive made of urea resin or melamine resin, etc. Phenolic resin adhesives, epoxy adhesives, polyurethane adhesives, reactive (meth) acrylic adhesives, rubber adhesives such as chloroprene rubber, nitrile rubber, styrene-butadiene rubber, silicone-based adhesives It is possible to use an adhesive such as an adhesive, an alkali metal silicate, an inorganic adhesive made of low melting point glass, or the like.
The composition system of the above-mentioned adhesive may be any composition form such as an aqueous type, a solution type, an emulsion type, and a dispersion type, and the properties thereof are film / sheet type, powder type, solid type, etc. Any form may be used, and the adhesion mechanism may be any form such as a chemical reaction type, a solvent volatilization type, a heat melting type, and a hot pressure type.
Thus, the above adhesive can be applied by, for example, a roll coating method, a gravure roll coating method, a kiss coating method, a coating method or the like, or a printing method. The coating amount is preferably about 0.1 to 10 g / m ² (dry state).

Next, in the present invention, the anchor coat agent layer constituting the laminated material according to the present invention will be described. As the anchor coat agent constituting such an anchor coat agent layer, for example, alkyl titane is used. Various water-based or oil-based anchor coating agents such as organic titanium-based, isocyanate-based, polyethyleneimine-based, polyptadiene-based, etc. can be used.
The above-mentioned anchor coating agent can be coated using a coating method such as a roll coat, a gravure roll coat, a kiss coat, and the like. The amount is preferably 0.1 to 5 g / m ² (dry state).

Examples of the melt-extruded resin layer in the above extrusion lamination method include, for example, polyethylene resins, polypropylene resins, acid-modified polyethylene resins, acid-modified polypropylene resins, ethylene-acrylic acid or methacrylic acid copolymers. , Thermoplastic resins such as sarin resin, ethylene-vinyl acetate copolymer, polyvinyl acetate resin, ethylene-acrylic acid ester or methacrylic acid ester copolymer, polystyrene resin, polyvinyl chloride resin, etc. 1 type (s) or 2 or more types can be used.
In the above extrusion laminating method, in order to obtain stronger adhesive strength, for example, lamination can be performed through an anchor coating agent layer such as the above-described anchor coating agent. .

In the present invention, examples of the primer layer include a polyurethane resin, a polyester resin, a polyamide resin, an epoxy resin, a phenol resin, a (meth) acrylic resin, and a polyvinyl acetate resin. A primer layer can be formed using a resin composition having a main component of a vehicle such as a polyolefin resin such as polyethylene or polypropylene, or a copolymer or modified resin thereof, a cellulose resin, or the like. .
In the present invention, for example, a primer coating layer is formed by coating using a coating method such as roll coating, gravure rolling coating, kiss coating, etc. Therefore, the coating amount is preferably about 0.1 to 10 g / m ² (dry state).
Moreover, in this invention, when performing said lamination | stacking, if necessary, pre-treatments, such as a corona treatment and an ozone treatment, can be given to a film.

Thus, in the present invention, a method for making a packaging bag according to the present invention using the laminated material according to the present invention as described above will be described. The multilayer laminated film according to the present invention is used as a heat-sealable material of the inner layer facing each other and folded, or the two sheets are overlapped, and the peripheral edge portion is further overlapped. Heat-sealed and provided with a seal portion, packaging bags having various forms can be made.
Thus, as a bag-making method, the above-mentioned laminated material is folded with the inner layer faces facing each other, or the two sheets are overlapped, and the peripheral edge of the outer periphery is, for example, a side sheet. Seal type, two-sided seal type, three-sided seal type, four-sided seal type, envelope-sealed seal type, jointed seal type (pillar seal type), pleated seal type It is possible to manufacture various types of packaging bags according to the present invention by heat sealing in the form of a heat seal such as a flat bottom seal type, a square bottom seal type, or the like.
In addition, for example, a self-supporting packaging bag (standing pouch) or the like can be manufactured, and in the present invention, a tube container or the like can also be manufactured using the above-described laminated material.
In the above, as the heat seal method, for example, a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal and the like are known. It can be done by the method.
In the present invention, a spout such as a one-piece type, a two-piece type, or the like, or a zipper for opening and closing can be arbitrarily attached to the packaging bag as described above.

  Next, in the case of a liquid-filled paper container including a paper base material as a packaging container, first, a laminated material obtained by laminating a paper base material is produced as a laminated material, and a blank for producing a desired paper container therefrom. Manufacturing a plate, and then boxing the body, bottom, head, etc. using the blank plate, for example, manufacturing a brick-type, flat-type or gable-top type liquid paper container, etc. Can do.

In the present invention, the packaging bag produced as described above includes, for example, food and drink, fruit juice, juice, drinking water, liquor, cooked food, marine product, frozen food, meat product, boiled food, rice cake, liquid meal. -Contents made up of various foods and beverages such as coffee, seasonings, chemicals such as adhesives, pressure-sensitive adhesives, liquid detergents, etc., miscellaneous goods such as cosmetics, pharmaceuticals, chemical warmers, photosensitive materials, and other articles Can be filled and packaged.
Thus, in the present invention, in particular, for example, a self-supporting bag for filling and packaging soy sauce, sauce, and soup, a self-supporting bag for filling and packaging fresh confectionery, and a packaging bag for filling and packaging frozen food Alternatively, it is useful as a self-supporting bag for filling and packaging liquid food and drink such as a self-supporting bag filled and packaged with boiled or retort food, etc.
In the present invention, for example, from the opening of the self-supporting bag manufactured as described above, for example, food and drink and other contents are filled, and then the upper opening is heat sealed and the upper sheet is placed. -Forming a lug part etc., Furthermore, a boil process, a retort process, etc. are given as needed, and the packaged product which consists of various forms can be manufactured.
In the present invention, it is particularly useful as a self-supporting bag for filling and packaging photosensitive materials as industrial materials, for example, articles such as films, photosensitive agents, and the like.

Thus, in the present invention, the packaged product produced as described above is such that the multilayer laminated film according to the present invention is particularly excellent in light shielding properties, light shielding properties, barrier properties, etc. Since it is possible to prevent the transmission of light or fluorescence, etc., and to prevent the contents from being decomposed or altered, or causing light degradation such as discoloration, etc. In the case of foods and drinks including etc., there is an advantage that oxidation of fat and oil components and the like due to transmission of sunlight or fluorescence can be prevented.
In particular, frozen foods and drinks are usually handled by supermarkets and other mass retailers. In this case, they are sold on display shelves that receive a lot of fluorescence from fluorescent lamps. It's real.
Thus, in frozen foods and beverages sold in the environment as described above, the fat and oil component is greatly affected by light having a wavelength of 500 nm or less, and has a maximum absorption of visible light in the yellow band around 550 nm. Therefore, the oxidation reaction is accelerated by the influence of fluorescent light or the like by a fluorescent lamp or the like, and the contents may be decomposed or altered.

However, as described above, the multilayer laminated film according to the present invention is particularly excellent in light-shielding property or light-shielding property, for example, blocking the transmission of sunlight or fluorescence by the sun or a fluorescent lamp, and the contents are decomposed. From the laminated material according to the present invention, which is manufactured using the multilayer laminated film according to the present invention, it is possible to prevent the deterioration or the deterioration of the light or the like from causing light deterioration such as others. In the frozen food and drink using the packaging bag according to the present invention, it is handled at a mass retailer such as a supermarket and sold on a display shelf that receives a lot of fluorescent light etc. Even if it is affected by fluorescence or the like, the oxidation reaction can be prevented from being promoted and the contents can be prevented from being decomposed or altered.
In the present invention, since the packaged product manufactured above does not use an aluminum foil or an aluminum deposited film, a metal (foreign matter) detector is used, and a metal (foreign matter) is detected by a metal (foreign matter) detector. It has the advantage that detection is also possible.

Further, in the present invention, in the packaged product manufactured as described above, the multilayer laminated film according to the present invention is particularly excellent in light-shielding property or light-shielding property, for example, transmission of sunlight or fluorescence by the sun or a fluorescent lamp or the like. For example, as a content, a photosensitive material as an industrial material can be prevented from being decomposed or altered or prevented from causing photodegradation such as discoloration or the like. It is useful as a packaging material for filling and packaging.
Next, the present invention will be described more specifically with reference to examples.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting the first layer Ethylene-α / olefin copolymer (trade name, Evolu-SP2020, manufactured by Mitsui Chemicals, Ltd., density = 0.0.0) copolymerized using a single-site catalyst (metallocene catalyst). A resin composition was prepared by sufficiently kneading 80.0 parts by weight of 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) and 20.0 parts by weight of titanium oxide as a white pigment.
(B). Resin composition constituting second layer Adhesive resin composition was prepared by sufficiently kneading maleic anhydride-modified adhesive polyethylene (trade name, Adma-NF528, 100, 0, manufactured by Mitsui Chemicals, Inc.).
(C). Resin composition constituting the third layer Ethylene-vinyl alcohol copolymer (EVOH) (Kuraray Co., Ltd., trade name, EVAR H171, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 min, ethylene molar concentration = 38%) 73.5 parts by weight, carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25.0 parts by weight as a white pigment are sufficiently kneaded. A resin composition was prepared.
(D). Resin composition constituting the fourth layer An adhesive resin composition was prepared by sufficiently kneading maleic anhydride-modified adhesive polyethylene (Mitsui Chemicals, trade name: Adma-NF528) 100.5.
(E). Resin composition constituting the fifth layer Ethylene-α / olefin copolymer (trade name, Evolu-SP2020, density = 0.0.0, made by Mitsui Chemicals, Inc.) copolymerized using a single site catalyst (metallocene catalyst). 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 minutes) 100.0 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and ethylenebisoleic acid amide 0 .05 parts by weight were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a five-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 20 μm, The layer of (b) resin composition is 5 μm, the layer of (c) resin composition is 10 μm, the layer of (d) resin composition is 5 μm, and the layer of (e) resin composition is 30 μm. A multilayer laminated film according to the present invention consisting of 5 types and 5 layers of coextruded inflation film having a total thickness of 70 μm was manufactured by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting the first layer Ethylene-α / olefin copolymer (trade name, Evolu-SP2020, manufactured by Mitsui Chemicals, Ltd., density = 0.0.0) copolymerized using a single-site catalyst (metallocene catalyst). A resin composition was prepared by sufficiently kneading 80.0 parts by weight of 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) and 20.0 parts by weight of titanium oxide as a white pigment.
(B). Resin composition constituting the second layer 100.0 parts by weight of maleic anhydride-modified adhesive polyethylene (trade name, Adma-NF528, manufactured by Mitsui Chemicals, Inc.) was sufficiently kneaded to prepare an adhesive resin composition did.
(C). Resin composition constituting third layer Nylon 6 / nylon 66 copolymer (product name, Ube Nylon 5033B, melting point 196 ° C., manufactured by Ube Industries, Ltd.) 73.5 parts by weight, carbon black 1. 5 parts by weight and 25.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to prepare a resin composition.
(D). Resin composition constituting the fourth layer 100.0 parts by weight of maleic anhydride-modified adhesive polyethylene (manufactured by Mitsui Chemicals, trade name, Adma-NF528) was sufficiently kneaded to prepare an adhesive resin composition did.
(E). Resin composition constituting the fifth layer Ethylene-α / olefin copolymer (trade name, Evolu-SP2020, density = 0.0.0, made by Mitsui Chemicals, Inc.) copolymerized using a single site catalyst (metallocene catalyst). 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 minutes) 100.0 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and ethylenebisoleic acid amide 0 .05 parts by weight were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a five-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 20 μm, The layer of (b) resin composition is 5 μm, the layer of (c) resin composition is 10 μm, the layer of (d) resin composition is 5 μm, and the layer of (e) resin composition is 30 μm. A multilayer laminated film according to the present invention consisting of 5 types and 5 layers of coextruded inflation film having a total thickness of 70 μm was manufactured by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting the first layer Functional polypropylene block copolymer (manufactured by Sun Aroma Co., Ltd., trade name, PF380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min) 80.0 parts by weight and 20.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer 100.0 parts by weight of maleic anhydride-modified adhesive polypropylene (trade name, Adma-QE800, manufactured by Mitsui Chemicals, Inc.) was sufficiently kneaded to prepare an adhesive resin composition did.
(C). Resin composition constituting the third layer Ethylene-vinyl alcohol copolymer (EVOH) (Kuraray Co., Ltd., trade name, EVAR H171, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 min, ethylene molar concentration = 38%) 73.5 parts by weight, carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25.0 parts by weight as a white pigment are sufficiently kneaded. A resin composition was prepared.
(D). Resin composition constituting the fourth layer 100.0 parts by weight of maleic anhydride-modified adhesive polypropylene (trade name, Adma-QE800, manufactured by Mitsui Chemicals, Inc.) was sufficiently kneaded to prepare an adhesive resin composition did.
(E). Resin composition constituting the fifth layer Functional polypropylene block copolymer (manufactured by Sun Aroma Co., Ltd., trade name, PF380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min) 100 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and 0.05 parts by weight of ethylenebisoleic acid amide were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a five-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 20 μm, The layer of (b) resin composition is 5 μm, the layer of (c) resin composition is 10 μm, the layer of (d) resin composition is 5 μm, and the layer of (e) resin composition is 30 μm. A multilayer laminated film according to the present invention consisting of 5 types and 5 layers of coextruded inflation film having a total thickness of 70 μm was manufactured by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Functional polypropylene block copolymer (manufactured by Sun Aroma Co., Ltd., trade name, PC380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min) 80.0 parts by weight and 20.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer 100.0 parts by weight of maleic anhydride-modified adhesive polypropylene (trade name, Adma-QE800, manufactured by Mitsui Chemicals, Inc.) was sufficiently kneaded to prepare an adhesive resin composition did.
(C). Resin composition constituting third layer MXD-6 metaxylylenediamine (MX nylon) (Mitsubishi Gas Chemical Co., Ltd., trade name, MX nylon S6007, density = 1.22 g / cm ³ , melt flow rate, MFR = 2.0 g / 10 min) 73.5 parts by weight, carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25.0 parts by weight as a white pigment were sufficiently kneaded to obtain a resin composition. Prepared.
(D). Resin composition constituting the fourth layer 100.0 parts by weight of maleic anhydride-modified adhesive polypropylene (trade name, Adma-QE800, manufactured by Mitsui Chemicals, Inc.) was sufficiently kneaded to prepare an adhesive resin composition did.
(E). Resin composition constituting the fifth layer Functional polypropylene block copolymer (trade name, PC380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min, manufactured by Sun Aroma Co., Ltd.) 100 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and 0.05 parts by weight of ethylene bisoleic acid amide were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a five-type five-layer top-blown air-cooled inflation co-extrusion film forming machine, the layer of the resin composition of (A) is 20 μm, The layer of (b) resin composition is 5 μm, the layer of (c) resin composition is 10 μm, the layer of (d) resin composition is 5 μm, and the layer of (e) resin composition is 30 μm. A multilayer laminated film according to the present invention consisting of 5 types and 5 layers of coextruded inflation film having a total thickness of 70 μm was manufactured by extrusion.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting first layer Ethylene-α / olefin copolymer (trade name, Evolu-SP2020, manufactured by Mitsui Chemicals, Ltd., density = 0.0.0) copolymerized using a single-site catalyst (metallocene catalyst). A resin composition was prepared by sufficiently kneading 80.0 parts by weight of 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) and 20.0 parts by weight of titanium oxide as a white pigment.
(B). Resin composition constituting second layer Ethylene-vinyl alcohol copolymer (EVOH) (Kuraray Co., Ltd., trade name, Eval H171, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 minutes, ethylene molar concentration = 38%) 73.5 parts by weight, carbon black 1.5 parts by weight as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded. A resin composition was prepared.
(C). Resin composition constituting the third layer Ethylene-α-olefin copolymer (trade name, Evolu-SP2020, density = 0.0.0, made by Mitsui Chemicals, Inc.) copolymerized using a single site catalyst (metallocene catalyst). 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 minutes) 100.0 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and ethylenebisoleic acid amide 0 .05 parts by weight were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a three-layer, three-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition of (A) is 20 μm, (B) A layer made of the resin composition of 10 μm and (c) a layer of the resin composition of 30 μm are coextruded to form a film, and three types and three layers of coextruded inflation film having a total thickness of 60 μm A multilayer laminated film according to the present invention was produced.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting the first layer Functional polypropylene block copolymer (manufactured by Sun Aroma Co., Ltd., trade name, PF380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min) 80.0 parts by weight and 10.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting second layer MXD-6 metaxylylenediamine (MX nylon) (Mitsubishi Gas Chemical Co., Ltd., trade name, MX nylon S6007, density = 1.22 g / cm ³ , melt flow rate, MFR = 2.0 g / 10 min) 73.5 parts by weight, carbon black 1.5 parts by weight as a black pigment, and 25.0 parts by weight of titanium oxide as a white pigment were sufficiently kneaded to obtain a resin composition. Prepared.
(C). Resin composition constituting the fifth layer Functional polypropylene block copolymer (manufactured by Sun Aroma Co., Ltd., trade name, PF380A, density = 0.9 g / cm ³ , melt flow rate, MFR = 1.0 g / 10 min) 100 parts by weight, 0.5 parts by weight of synthetic silica, 0.05 parts by weight of erucic acid amide, and 0.05 parts by weight of ethylenebisoleic acid amide were sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a three-layer, three-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition of (A) is 20 μm, (B) A layer made of the resin composition of 10 μm and (c) a layer of the resin composition of 30 μm are coextruded to form a film, and three types and three layers of coextruded inflation film having a total thickness of 60 μm A multilayer laminated film according to the present invention was produced.
When the multilayer laminated film produced above was visually recognized from the first layer side, it was milky white and excellent in aesthetics.
Furthermore, in the multilayer laminated film produced above, the light-shielding property was sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted and was extremely good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
In addition, the appearance design was greatly improved by the dye barrier.

(Experimental example)
About the multilayer laminated film which concerns on said Examples 1-6, (1). Film thickness, (2). Oxygen permeability, (3). Total light transmittance, (4). The light shielding property was measured and evaluated.
(1). Measurement of film thickness This was measured from μ-meter manufactured by Sony Corporation.
(2). Measurement of oxygen permeability This was measured from a measuring method based on the JIS-K7126B method.
The oxygen permeability was measured under the condition of 23 ° C.-60% RH from the MOCON method.
(3). Measurement of total light transmittance This was evaluated by measuring the transmittance of all light using Suga Test Instruments Co., Ltd., model name, haze meter (SM-C).
(4). Measurement of light shielding properties This was evaluated by measuring the light transmittance in the region of 220 nm to 800 nm using a model name, UV-2400PC, spectrophotometer, manufactured by Shimadzu Corporation.
The measurement results are shown in Table 1 below.

(Table 1)
┌────┬───┬──────┬───┬─────────────────┐ │ │ Film thickness │ Oxygen permeability │ All Light │ Shading [%] │ │ │ [μm | cc / m ² │Transmissivity ├─────┬─────┬─────┤ │ │] │d ・ atm] │ [ %] │500nm│550nm│650nm│ ├────┼───┼──────┼───┼─────┼─────┼─────┤ Example 1│ 70│ 3.1 │0.3│0.12 │0.20 │0.45 │ ├────┼───┼─────────┼──── ─┼─────┼─────┤ │Example 2│ 70│15.3 │0.3│0.12 │0.21 │0.46 │ ├────┼─── ┼──────┼───┼─────┼─────┼─────┤ │Example 3│ 70│ 2.9 │0.3│0.12 │0.20 │0.46 │ ├────┼───┼──────┼───┼─────┼─────┼ ─────┤ │Example 4│ 70│ 1.4 │0.3│0.13 │0.22 │0.46 │ ├────┼───┼──────┼ ───┼─────┼─────┼─────┤ │Example 5│ 60│ 3.5 │0.5│0.22 │0.31 │0.62 │ │ ────┼───┼──────┼───┼─────┼─────┼─────┤ │Example 6│ 60│ 1.9 │0 .4│0.16 │0.27 │0.57 │ └────┴───┴──────┴───┴─────┴─────┴── ───┘

  As is clear from the measurement results shown in Table 1 above, the multilayer laminated film according to the present invention has an appropriate light shielding property or light shielding property while maintaining the appearance, aesthetics, etc. In addition, it has a high level of force, excellent oxygen barrier properties, excellent barrier properties to prevent penetration and permeation of components in the contents, and has sufficient practicality.

(Reference Example 1)
(1). The surface of the white resin layer of the first layer of the multilayer laminated film according to the present invention produced in Example 1 is subjected to corona treatment, and then a two-component curable urethane adhesive (main agent) on the corona treatment surface. : Polyester polyol, Curing agent: Aliphatic socyanate), which was coated to a thickness of 4.0 g / m ² (dry state) using a gravure roll coat method and laminated Then, a biaxially stretched nylon 6 film (trade name, Harden N-1102, manufactured by Toyobo Co., Ltd.) having a thickness of 15 μm is bonded to the surface of the adhesive layer for laminating. Thus, a laminated material according to the present invention was manufactured.
(2). Next, using the laminate material produced above, then cut out the front plate, the rear plate made of 100 mm × 150 mm, and the inverted V-shaped bottom plate formed with a notch at the end of 100 mm × 50 mm, The front plate and the rear plate are sealed from the impulse sealer on both sides of the 150 mm side, and then the bottom plate is sealed from the impulse sealer to the one-side unsealed portion, so that the self-supporting light shielding A self-supporting bag (standing pouch) according to the present invention as a packaging container was manufactured.
In the self-supporting bag manufactured as above, the snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal, so that the self-supporting according to the present invention is formed. A packaged product using bags was produced.
In the packaged product manufactured above, no leakage, overturning, buckling, etc. were observed, and when the drop test from 1.2 m was performed 5 times, no bag breakage, leakage, etc. were observed. .
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 2)
(1). Using the multilayer laminated film according to the present invention produced in Example 2 above, the surface of the first white resin layer is subjected to corona discharge treatment, and then the two-component curable urethane system is applied to the corona treatment surface. An adhesive (main agent: polyester polyol, curing agent: aliphatic socyanate) was used, and this was coated with a thickness of 4.0 g / m ² (dry) using a gravure roll coat method. -Forming a layer adhesive layer, and then laminating a 15 .mu.m thick biaxially stretched nylon 6 film with the corona-treated surface facing each other, and then laminating the laminate layer surface. Both were laminated by dry lamination.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor deposition film is laminated on the laminating adhesive layer surface with the silicon oxide vapor-deposition film surface facing each other. Then, both of them were dry laminated and laminated to produce a laminated material according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. the packaged semifinished product produced, then subjected to the packaging workpiece placed in the retort, the temperature, 120 ° C., a pressure, 2.1Kgf / cm ² · G, time, the retorted retorting conditions of 30 minutes The retort packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product having excellent storage stability and filling / packaging suitability for the contents.
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 3)
(1). The surface of the white resin layer of the first layer of the multilayer laminated film according to the present invention produced in Example 3 is subjected to corona treatment, and then a two-component curable urethane adhesive (main agent) on the corona treatment surface. : Polyester polyol, Curing agent: Aliphatic socyanate), which was coated to a thickness of 4.0 g / m ² (dry state) using a gravure roll coat method and laminated Then, a biaxially stretched polypropylene film having a thickness of 20 μm was bonded to the surface of the laminate adhesive layer to produce a laminate according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, the snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. The packaged food according to the present invention was manufactured.
In the packaged product produced above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and it is excellent in storage and storage, and is suitable for filling and packing contents. It was possible to produce a fully satisfactory packaged product.
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 4)
(1). Using the multilayer laminated film according to the present invention produced in Example 4 above, the surface of the first white resin layer is subjected to corona discharge treatment, and then the two-component curable urethane system is applied to the corona treatment surface. An adhesive (main agent: polyester polyol, curing agent: aliphatic socyanate) was used, and this was coated with a thickness of 4.0 g / m ² (dry) using a gravure roll coat method. -Forming a layer adhesive layer, and then laminating a 15 .mu.m thick biaxially stretched nylon 6 film with the corona-treated surface facing each other, and then laminating the laminate layer surface. Both were laminated by dry lamination.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor deposition film is laminated on the laminating adhesive layer surface with the silicon oxide vapor-deposition film surface facing each other. Then, both of them were dry laminated and laminated to produce a laminated material according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. the packaged semifinished product produced, then subjected to the packaging workpiece placed in the retort, the temperature, 120 ° C., a pressure, 2.1Kgf / cm ² · G, time, the retorted retorting conditions of 30 minutes The retort packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product having excellent storage stability and filling / packaging suitability for the contents.
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 5)
(1). Using the multilayer laminated film according to the present invention produced in Example 5 above, the surface of the first white resin layer is subjected to corona discharge treatment, and then the two-component curable urethane system is applied to the corona treatment surface. An adhesive (main agent: polyester polyol, curing agent: aliphatic socyanate) was used, and this was coated with a thickness of 4.0 g / m ² (dry) using a gravure roll coat method. -Forming a layer adhesive layer, and then laminating a 15 .mu.m thick biaxially stretched nylon 6 film with the corona-treated surface facing each other, and then laminating the laminate layer surface. Both were laminated by dry lamination.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor deposition film is laminated on the laminating adhesive layer surface with the silicon oxide vapor-deposition film surface facing each other. Then, both of them were dry laminated and laminated to produce a laminated material according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. the packaged semifinished product produced, then subjected to the packaging workpiece placed in the retort, the temperature, 120 ° C., a pressure, 2.1Kgf / cm ² · G, time, the retorted retorting conditions of 30 minutes The retort packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product having excellent storage stability and filling / packaging suitability for the contents.
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

(Reference Example 6)
(1). Using the multilayer laminated film according to the present invention manufactured in Example 6 above, the surface of the first white resin layer is subjected to corona discharge treatment, and then the two-component curable urethane system is applied to the corona treatment surface. An adhesive (main agent: polyester polyol, curing agent: aliphatic socyanate) was used, and this was coated with a thickness of 4.0 g / m ² (dry) using a gravure roll coat method. -Forming a layer adhesive layer, and then laminating a 15 .mu.m thick biaxially stretched nylon 6 film with the corona-treated surface facing each other, and then laminating the laminate layer surface. Both were laminated by dry lamination.
Next, after applying the corona discharge treatment to the surface of the biaxially stretched nylon 6 film laminated as described above, a laminating adhesive layer is formed on the corona treatment surface in the same manner as described above, and thereafter A 12 μm-thick biaxially stretched polyethylene terephthalate film having a 200-nm-thick silicon oxide vapor deposition film is laminated on the laminating adhesive layer surface with the silicon oxide vapor-deposition film surface facing each other. Then, both of them were dry laminated and laminated to produce a laminated material according to the present invention.
(2). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated film are opposed to each other, and then the outer peripheral edge is sealed in a three-way heat seal. A three-sided seal-type flexible packaging bag having an opening and an upper opening was produced.
In the three-sided seal type soft packaging bag produced above, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. the packaged semifinished product produced, then subjected to the packaging workpiece placed in the retort, the temperature, 120 ° C., a pressure, 2.1Kgf / cm ² · G, time, the retorted retorting conditions of 30 minutes The retort packaged food according to the present invention was manufactured.
In the packaged product manufactured above, the multilayer laminated film as a heat seal material is excellent in properties such as strength and waist, and is excellent in transparency, slipperiness, impact resistance, tearability, etc. Furthermore, because it is excellent in heat seal characteristics, laminating characteristics, etc., almost no phenomena such as delamination are observed, and leakage of the packed and packed contents is not recognized, and its storability. In addition, it was possible to produce a fully satisfactory packaged product having excellent storage stability and filling / packaging suitability for the contents.
Furthermore, no discoloration of the contents due to light was observed.
The oxygen barrier property was also excellent, and the quality of the contents was not deteriorated.
In addition, the packaged product manufactured as described above can be subjected to foreign matter inspection using a metal detector.

  The multilayer laminated film according to the present invention is used as a light-shielding or light-shielding material, a barrier material, a heat-sealable material or the like, and a substrate such as another plastic film, a paper substrate. In addition, various kinds of substrate films such as a barrier substrate that prevents permeation of oxygen gas or water vapor, cellophane, woven or non-woven fabric, glass plate, and the like are arbitrarily laminated with various kinds of various films. The laminated material having the form can be manufactured, and thus the laminated material can be made into a bag and applied to uses such as packaging materials constituting packaging bags having various forms, and the like.

It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the multilayer laminated film which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of the example about the laminated material which concerns on this invention as a packaging material manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. The schematic perspective view which shows the structure of the example about the packaging bag concerning this invention manufactured by bag-making the laminated material based on this invention manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. It is. The schematic perspective view which shows the structure of the example about the packaging bag concerning this invention manufactured by bag-making the laminated material based on this invention manufactured using the multilayer laminated film which concerns on this invention shown in said FIG. It is.

Explanation of symbols

A, A ₁ Multilayer laminated film B Laminated material C Packaging bag D Packaged product 1 White polyolefin resin layer 2 Gray light-shielding / barrier resin layer 3 Transparent or translucent backside polyolefin resin layer 4, 4a Coextrusion Multilayer laminated film 5, 5a Adhesive polyolefin resin layer 11 Base film 12 Print pattern layer 21 Side seal part 22 Bottom seal part 23 Opening part 24 Contents 25 Upper seal part

Claims (20)

A multilayer laminated film comprising a laminated structure in which a white polyolefin resin layer, a gray light-shielding / barrier resin layer, and a transparent or translucent backside polyolefin resin layer are sequentially laminated. Between the white polyolefin resin layer and the gray light-shielding / barrier resin layer, and between the black or gray light-shielding / barrier resin layer and the transparent or translucent backside polyolefin resin layer, respectively. The multilayer laminated film according to claim 1, wherein an adhesive polyolefin resin layer is interposed. The white polyolefin resin layer contains a polyolefin resin as a main component, further contains a white pigment, and the content of the white pigment is 0.5% by weight to 30.0% with respect to the polyolefin resin. 3. The multilayer laminated film according to claim 1, comprising a white polyolefin-based resin layer made of a resin composition consisting of% by weight. The gray light-shielding / barrier resin layer contains a barrier resin as a main component, further contains a black pigment and a white pigment, and the content of the black pigment is 0 with respect to the barrier resin. .1 wt% to 20.0 wt%, and the white pigment content is composed of a light shielding / barrier resin layer of a resin composition comprising 1 to 30 times the black pigment content. The multilayer laminated film according to any one of claims 1 to 3, wherein the multilayer laminated film is characterized. The transparent or translucent backside polyolefin-based resin layer is composed of a heat-sealable resin layer made of a resin composition containing a polyolefin-based resin as a main component. The multilayer laminated film described in item 1. 6. The adhesive polyolefin resin layer according to claim 1, wherein the adhesive polyolefin resin layer is composed of a heat-sealable resin layer made of a resin composition containing an adhesive polyolefin resin as a main component. A multilayer laminated film described in 1. The multilayer polyolefin film according to any one of claims 1 to 6, wherein the white polyolefin-based resin layer has a thickness of 3 µm to 30 µm. The multilayer laminated film according to any one of claims 1 to 7, wherein the gray light-shielding and barrier resin layer has a thickness of 5 to 30 µm. The multilayer laminated film according to any one of claims 1 to 8, wherein the transparent or translucent backside polyolefin-based resin layer has a thickness of 5 to 100 µm. The multi-layer laminated film according to any one of claims 1 to 9, wherein the adhesive polyolefin-based resin layer has a thickness of 5 µm to 30 µm. The multilayer laminated film according to any one of claims 1 to 10, wherein the polyolefin resin constituting the white polyolefin resin layer is made of a polyethylene resin or a modified resin thereof. The multilayer laminated film according to any one of claims 1 to 10, wherein the polyolefin resin constituting the white polyolefin resin layer comprises a polypropylene resin or a modified resin thereof. The gray light-shielding / barrier resin layer is composed of a gray light-shielding / barrier resin layer made of a resin composition containing as a main component a barrier resin that prevents permeation of oxygen gas and water vapor. The multilayer laminated film according to any one of claims 1 to 12. The gray light-shielding / barrier resin layer is composed of a gray light-shielding / barrier resin layer made of a resin composition containing as a main component a barrier resin that prevents penetration and transmission of components in the contents. The multilayer laminated film according to any one of claims 1 to 12. The multilayer laminated film according to any one of claims 1 to 14, wherein the barrier resin constituting the gray light-shielding and barrier resin layer comprises an ethylene-vinyl alcohol copolymer. . The multilayer laminated film according to any one of claims 1 to 15, wherein the barrier resin constituting the gray light-shielding and barrier resin layer is made of nylon MXD6 resin. 17. The barrier resin constituting the gray light-shielding and barrier resin layer is made of nylon 6 resin or a copolymer of nylon 6 and nylon 66. The multilayer laminated film described in item 1. The adhesive polyolefin resin constituting the adhesive polyolefin resin layer is made of a polyethylene resin or a polypropylene resin, or a modified resin thereof. The multilayer laminated film to be described. The above-mentioned claim, wherein the black pigment constituting the gray light-shielding and barrier resin layer comprises one or more of black pigments composed of iron black, graphite, or carbon black. The multilayer laminated film described in any one of 1-18. The white pigment constituting the gray light-shielding and barrier resin layer is basic lead carbonate, basic lead sulfate, basic lead silicate, zinc white, zinc sulfide, lithopone, antimony trioxide, anatase type titanium oxide, or The multilayer laminated film according to any one of claims 1 to 19, wherein the multilayer laminated film comprises one or more of white pigments made of rutile titanium oxide.

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