JP2005231041A - Multilayered laminated film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayered laminated film excellent in shading properties and gas barrier properties for preventing the permeation of an oxygen gas and steam, having content protecting properties, further excellent in aesthetic properties, awakening the buying will of a consumer without damaging the appearance of a package and useful for mainly packaging retort food, snack confectioneries, oils and fats, frozen food and the others. <P>SOLUTION: The multilayered laminated film comprises a coextrusion laminated film containing at least a shading resin layer and a barrier resin layer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a multilayer laminated film, and more specifically, a polyolefin resin as a main component, which has excellent light shielding properties, barrier properties, heat seal properties, etc., and also has excellent fastness properties, etc. It has protective suitability, has excellent cosmetics, and does not impair the appearance of the package, and has motivated consumers to purchase, mainly retort foods, fats and oils, frozen foods, snacks, optical industrial materials In addition, the present invention relates to a multilayer laminated film useful for filling and packaging others.

Conventionally, as laminated film filling and packaging retort foods, fats and oils, frozen foods, snacks, optical industrial materials, etc., content protection, especially from the ultraviolet region to the visible region as a measure to prevent fat oxidation A light shielding property for shielding sunlight or fluorescence is required.
Thus far, as the light-shielding material, aluminum foil or an aluminum vapor deposition film has been used as the most common material.
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 the transmission of oxygen gas, water vapor and the like, and also has a light shielding property such as sunlight or fluorescence. Therefore, although it is an extremely useful material, aluminum foil or the like lacks bending resistance, and therefore, not only has a problem that pinholes are easily generated and the barrier property is impaired, but also as a packaging container. When the waste is disposed of as waste after use, for example, when it is disposed of by incineration, etc., a metal such as aluminum remains, which may damage the incinerator, which is not suitable for disposal and has problems such as environmental destruction. This is not preferable because it has a problem in that it lacks environmental suitability and the like.
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.

Therefore, in recent years, instead of using the aluminum foil or aluminum deposited film as the light-shielding material, a white colorant or a black colorant is used instead of these, and a white or black color containing this is used. Forms a colored layer or film, and therefore uses the white or black colored layer or film as a light-shielding material because it exhibits a light-shielding function by reflecting or absorbing sunlight or fluorescence. New technologies have been proposed.
Specifically, the content of white pigment is 5 to 20% by weight and the thickness is 10 μm or more, and the content of black pigment is 0.2 to 1.0% by weight, And the laminated film for food packaging formed by laminating the black pigment 1 with a gray film containing a white pigment at a weight ratio of 2.0 to 60 and having a thickness of 10 μm or more, There has been 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 (see, for example, Patent Document 1).
JP-A-11-91042 (Claims)

However, the laminated film for food packaging according to the above-mentioned Patent Document 1 is used to produce a packaging material therefrom, and then the packaging material is used to produce a bag to produce a packaging bag. Thereafter, when the packaging bag is used to produce a packaged product by filling and packaging, for example, retort foods, snacks, fats and oils, frozen foods, etc., in particular, packaging products filled and packaged with retort foods, frozen foods, etc. In the processing process such as retort treatment or freezing treatment, the laminating strength of the laminated film for food packaging constituting the packaging bag or the heat sealing strength of the heat sealing portion, etc. There is a problem that it is difficult to produce a desired packaged product due to chipping, delamination or bag breaking.
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 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.

  Therefore, the present invention is excellent in light-shielding properties, is aluminum-free, and has excellent barrier properties that prevent the transmission of oxygen gas, water vapor, etc., lamination strength, heat seal strength, etc. In addition, it is excellent in various fastnesses such as weather resistance, heat resistance, water resistance, etc., in particular, excellent in light shielding properties, as well as food and drink, chemical products, etc., photosensitive materials as industrial members that require complete light shielding It is extremely useful as a packaging material for packaging, has excellent packing and storage suitability for contents, excellent cosmetics without impairing the packaging appearance, and easy foreign object inspection with a metal detector. In addition, it is to provide a light-shielding multilayer laminated film that is extremely excellent in disposal property, environmental property and the like without generating harmful substances when incinerated and discarded after use.

  As a result of various researches on the light-shielding material as described above, the present inventor uses a polyolefin-based resin and a barrier resin as a medium, pays attention to the co-extrusion lamination processability, and also uses a black pigment for light-shielding and white pigment Focusing on light-shielding properties and its cosmetic appearance, and barrier properties due to barrier resins, first, a multilayer laminated film comprising at least a co-extruded laminated film comprising a light-shielding resin layer and a barrier resin layer, specifically Contains a polyolefin resin as a main component, further contains a black pigment and a white pigment, and the content of the black pigment is 0.1% by weight to 20.0% by weight with respect to the polyolefin resin. And a resin composition in which the content of the white pigment is 1 to 30 times the content of the black pigment, and a barrier that prevents permeation of oxygen gas and water vapor. A multilayer laminated film comprising at least a coextruded laminated film including a light shielding resin layer and a barrier resin layer. Thus, the multilayer laminated film is used as a material having effects such as light shielding property, barrier property, and heat seal property, and the multilayer laminated film and at least a base film are laminated. A laminated material is produced, and further, the laminated material is used, and a bag is produced from the laminated material to produce a desired packaging bag, and then, for example, retort food, snacks, fats and oils, When a packaged product is manufactured by filling and packaging frozen foods, etc., it is excellent in light-shielding properties while being aluminum-free, and has excellent gas barrier properties that prevent permeation of oxygen gas and water vapor. In addition, 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 or light blocking properties, for example, Prevents sunlight or fluorescent light from being transmitted by the sun or fluorescent lamps, prevents the contents from being decomposed or altered, or causing light deterioration such as discoloration, etc. , Having storage suitability, in particular, having extremely excellent utility as a packaging material for photosensitive materials as industrial members requiring complete light shielding, and excellent in cosmetics without impairing the packaging appearance, Produces self-supporting bags that do not generate harmful substances when incinerated after use, are extremely excellent in disposal and environmental suitability, and are easy to detect metal fragments (foreign matter) using a metal detector. Find out what you can do The present invention has been completed.

  That is, the present invention relates to a multilayer laminated film characterized by comprising a coextruded laminated film including at least a light shielding resin layer and a barrier resin layer.

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 properties while being aluminum-free, and transmits oxygen gas and water vapor. It has excellent gas barrier properties, heat resistance, etc., strength, etc., and robustness such as weather resistance, heat resistance, water resistance, laminating strength, etc. Excellent in light-blocking property or light-blocking property, for example, blocking the transmission of sunlight or fluorescent light by the sun or fluorescent lamp, etc., contents are decomposed or altered, or discolored, etc. Prevents photo-degradation, has contents filling and packaging suitability, storage suitability, etc., and has particularly excellent utility as a packaging material for photosensitive materials as industrial members that require complete light shielding. ,And, Excellent cosmetics without impairing the appearance of the product. Furthermore, it does not generate harmful substances when incinerated and discarded after use, and is extremely suitable for disposal and environmental suitability. (Foreign matter) It has an advantage of easy detection.
Thus, the multilayer laminated film according to the present invention is produced by laminating at least a base film and the like to produce a laminated material. Manufacturing packaging products of various forms by filling and packaging the packaging bags with, for example, retort foods, snacks, fats and oils, frozen foods, etc. It is something that can be done.

Hereinafter, the present invention will be described in more detail with reference to the drawings.
First, FIG.1, FIG.2, FIG.3 and FIG. 4 is schematic sectional drawing which shows a few examples of the layer structure about the multilayer laminated film which concerns on this invention, FIG. 5 shows this invention shown in FIG. FIG. 6 is a schematic cross-sectional view showing an example of the layer structure of the laminated material according to the present invention manufactured using such a multilayer laminated film, and FIG. 6 shows the production of the laminated material according to the present invention shown in FIG. FIG. 7 is a schematic perspective view showing an outline of the configuration of the packaging bag according to the present invention produced by bagging, and FIG. 7 is a packaging in which the contents are packed in the packaging bag according to the present invention shown in FIG. It is a schematic perspective view which shows the outline of the structure about a product.

  First, in the present invention, the multilayer laminated film according to the present invention will be described. As the multilayer laminated film A according to the present invention, for example, as shown in FIG. One layer constituting the extruded laminated film 1 is composed of the light shielding resin layer 2 and one layer is composed of the barrier resin layer 3, and includes at least the light shielding resin layer 2 and the barrier resin layer 3. The basic structure consists of the film 1.

Thus, as a specific example of the multilayer laminated film according to the present invention, as shown in FIG. 2, it contains a polyolefin resin as a main component, further contains a black pigment and a white pigment, and a black pigment. The resin composition comprises 0.1 wt% to 20.0 wt% of the polyolefin resin, and the white pigment content comprises 1 to 30 times the black pigment content. A barrier resin layer 3 made of a resin composition comprising, as a main component, a barrier resin that prevents permeation of oxygen gas and water vapor on one surface of the light shield resin layer 2. And further comprising a polyolefin resin as a main component on both the other surface of the light-shielding resin layer 2 and the other surface of the barrier resin layer 3, and further including a white pigment. And containing white pigment A multilayer according to the present invention comprising a coextruded laminated film 1a having a structure in which white resin layers 4 and 4 are laminated with a resin composition having an amount of 0.5 to 30.0% by weight with respect to a polypropylene resin. it can be exemplified a laminated film a _1.

As another specific example of the multilayer laminated film according to the present invention, as shown in FIG. 3, it contains a polyolefin resin as a main component, further contains a black pigment and a white pigment, and a black pigment. The resin composition comprises 0.1 wt% to 20.0 wt% of the polyolefin resin, and the white pigment content comprises 1 to 30 times the black pigment content. A barrier resin layer 3 made of a resin composition comprising, as a main component, a barrier resin that prevents permeation of oxygen gas and water vapor on one surface of the light shield resin layer 2. And transparent or semi-transparent by a resin composition containing a polyolefin resin as a main component on both the other surface of the light-shielding resin layer 2 and the other surface of the barrier resin layer 3. Transparent resin layer , It can be exemplified multilayer laminate film A ₂ according to the present invention comprising a coextruded multilayer film 1b having the structure of laminating a 5.

Furthermore, another specific example of the multilayer laminated film according to the present invention is illustrated. As shown in FIG. 4, the polyolefin-based resin is included as a main component, and further, a black pigment and a white pigment are included. The resin composition comprises 0.1 wt% to 20.0 wt% of the polyolefin resin, and the white pigment content comprises 1 to 30 times the black pigment content. A barrier resin layer 3 made of a resin composition comprising, as a main component, a barrier resin that prevents permeation of oxygen gas and water vapor on one surface of the light shield resin layer 2. And further comprising a polyolefin resin as a main component on both the other surface of the light-shielding resin layer 2 and the other surface of the barrier resin layer 3, and further including a white pigment. And of white pigment The white resin layers 4 and 4 are laminated with a resin composition having an amount of 0.5% to 30.0% by weight with respect to the polypropylene resin, and the both surfaces of the white resin layers 4 and 4 are also laminated. A multilayer laminated film A _{3 according} to the present invention comprising a coextruded laminated film 1b having a constitution in which transparent or translucent resin layers 5 and 5 made of a resin composition containing a polyolefin resin as a main component are laminated. Can do.

The above illustrations illustrate a few examples of the multilayer laminated film according to the present invention, and it goes without saying that the present invention is not limited thereto.
In the multilayer laminated film according to the present invention, the light-shielding resin layer, the white resin layer, the transparent or translucent resin layer, etc. are all made of a polyolefin-based resin as a main component, and thus have mutual affinity. The barrier resin layer is composed mainly of, for example, an ethylene-vinyl alcohol copolymer or nylon MXD6 resin as will be described later. Therefore, the light-shielding resin layer, the white resin layer, and the transparent or semi-transparent resin layer are inferior in affinity, adhesion, etc. The transparent resin layer or the like and the barrier resin layer are desirably laminated via an adhesive resin layer or the like having adhesiveness to each other.
Further, in the multilayer laminated film according to the present invention, although not shown, the light-shielding resin layer, the barrier resin layer, the white resin layer, or the transparent or translucent resin layer is not limited to one layer, but two types of each resin composition. As described above, it can be laminated in multiple layers.
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 acts as a light-shielding material, a barrier material, and a heat-sealable material, has excellent light-shielding properties while being aluminum-less, and It has excellent gas barrier properties that prevent the permeation of oxygen gas and water vapor, is excellent in heat seal properties, etc., has strength, etc., and has weather resistance, heat resistance, water resistance, and laminating strength. Excellent in various other fastnesses, in particular, excellent in light-shielding properties or light-shielding properties, for example, blocking the transmission of sunlight or fluorescence by the sun or fluorescent lamps, etc., and the contents are decomposed or altered, or Prevents photodegradation such as discoloration, discoloration, etc., has contents filling and packaging suitability, storage suitability, etc., especially excellent as a packaging material for photosensitive materials as industrial members that require complete light shielding Have 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 more specifically. In the multilayer laminated film according to the present invention, the light-shielding resin layer basically functions synergistically with the white resin layer. It acts as a light-blocking or light-blocking layer that absorbs sunlight or fluorescent light from the sun or a fluorescent lamp and blocks its transmission.
In the multilayer laminated film according to the present invention, the barrier resin layer acts as a gas barrier layer that prevents permeation of oxygen gas and water vapor.
Next, in the multilayer laminated film according to the present invention, the white resin layer basically includes a protective layer or a concealing layer that mainly protects or conceals the light shielding resin layer or the barrier resin layer, and the sun. Alternatively, it acts as a light blocking or light blocking layer that reflects or diffuses sunlight or fluorescent light from a fluorescent lamp or the like and blocks its transmission, and the white resin layer is formed on, for example, a desired layer. When directly or indirectly forming a printed pattern such as characters, symbols, patterns, figures, etc., the printed pattern such as desired characters, symbols, patterns, figures, etc. that make up the printed pattern is clearly displayed. The white resin layer acts as a base layer, and the white resin layer constitutes a laminated material as a packaging material to be described later. Resin layer It is intended to act as a.

Furthermore, in the multilayer laminated film according to the present invention, the transparent or translucent resin layer basically functions as a protective layer for protecting the light shielding resin layer, the barrier resin layer, the white resin layer, or the like. Further, in some cases, it acts as a concealing layer for concealing these, and further, a transparent or translucent resin layer is printed thereon with, for example, desired characters, symbols, designs, figures, etc. When a pattern is formed directly or indirectly, it acts as an underlayer that makes the printed pattern of the desired character, symbol, pattern, figure, etc. that constitutes the printed pattern clear, and is a transparent or translucent resin. The layer constitutes a laminated material as a packaging material, which will be described later, and acts as a heat-sealable resin layer that forms a seal portion, for example, when a bag is made using this material. is there.
Thus, since the multilayer laminated film according to the present invention is aluminum-free, it does not generate harmful substances when incinerated and discarded after use, and is extremely excellent in disposal and environmental suitability. 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, a laminated material 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. 5, the book shown in FIG. The case where the multilayer laminated film A according to the invention is used will be described. First, a printed pattern made of, for example, desired characters, symbols, patterns, figures, etc. After the layer 12 is formed, the multilayer laminated film A according to the present invention shown in FIG. 1 is laminated on the surface of the base film 11 including the printed pattern layer 12 with one surface constituting the same facing the surface. It can laminate | stack together and can manufacture the laminated material B which concerns on this invention manufactured using the multilayer laminated film A which concerns on this invention.
In FIG. 5, the meanings of reference numerals 1, 2, 3, A, etc. represent the same meanings as the reference numerals 1, 2, 3, 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 white resin layer constituting a multilayer laminated film according to the present invention, or a transparent or translucent resin layer, etc. After forming a printed pattern layer composed of desired characters, symbols, patterns, figures, etc. on the surface of the substrate, a substrate film is laminated and laminated on the surface including the printed pattern layer according to the present invention. A laminated material according to the present invention using a multilayer laminated film can also be produced.
Of course, in the present invention, the multilayer laminated film according to the present invention shown in FIGS. 2 to 4 is used, and the laminated material according to the present invention can be produced in the same manner as described above.

  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 an example of such a packaging bag, the case of a packaging bag made using the laminated material B according to the present invention shown in FIG. 5 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 sealing resin layer are heat-sealed at the outer periphery and the side seal portions 21 and 21 and the bottom seal, respectively. -Forming the lug 22 and the like, and forming the opening 23 above, according to the present invention Way according to the present invention described bag-making using the layer material 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. 7, the three-side seal type packaging bag C according to the present invention manufactured as described above is used, and from the opening 23, for example, retort food, snack food Foods and beverages such as foods, fats and oils, frozen foods, etc., and other contents 24 are filled, then the opening 23 is heat sealed, and the upper heat sealing 25 is The packaged product D according to the present invention can be manufactured by forming and using the packaging bag C according to the present invention.
The above illustration 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, it can take the form of a packaging bag suitable for the contents such as a pillow packaging form, a gusset packaging form, a standing (self-supporting) pouch packaging form, and the like.
Further, in the present invention, the laminated material according to the present invention manufactured using the multilayer laminated film according to the present invention shown in FIGS. The packaging bag according to the present invention can be manufactured.

  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 As the polyolefin resin forming the light-shielding resin layer, white resin layer, transparent or translucent resin layer, etc. constituting the multilayer laminated film according to the invention, a polyolefin resin that can be melted by heat and extruded from a T-die, Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene-α-olefin copolymer polymerized using a metallocene catalyst, polypropylene, ethylene- Vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene -Polyolefin resins such as methacrylic acid copolymer, ethylene-propylene copolymer, methylpentene polymer, polyethylene, polypropylene, etc., and unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, etc. One or two or more kinds of polyolefin resins having heat sealing properties such as acid-modified polyolefin resins modified with the above can be used.

Accordingly, 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 the 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, as the polyolefin resin, it is preferable to use a polypropylene resin such as a homopolymer of propylene or a copolymer (copolymer) of propylene and an α-olefin such as ethylene. It is.
In addition, as said polypropylene resin, the block copolymer (copolymer) or a 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 rises 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 blowing inflation film forming method.

Next, in the present invention, as the barrier resin for forming the barrier resin layer constituting the multilayer laminated film according to the present invention, a resin having a property of blocking or preventing permeation of oxygen gas or water vapor, for example, poly Vinylidene chloride resin, polyvinyl alcohol resin, ethylene-vinyl alcohol copolymer, nylon MXD6 resin, and others 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, an ethylene-vinyl alcohol copolymer or a nylon MXD6 resin. Is preferably used.

  Furthermore, in the present invention, the adhesive resin for forming the adhesive resin layer constituting the multilayer laminated film according to the present invention is melted by heat and has adhesion to the above-mentioned polyolefin resin and barrier resin. Resins, specifically, for example, polyolefin resins, especially ethylene-vinyl acetate copolymers, ionomer resins, ethylene-ethyl acrylate copolymers, ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers. An acid-modified polyolefin obtained by modifying a polyolefin resin such as a polymer, polyethylene resin or polypropylene resin with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, maleic acid, itaconic acid, etc. One or two or more types of polyolefin resins having heat seal properties such as epoxy resins It can be used.

Next, in the present invention, as the black pigment forming the light-shielding resin layer constituting the multilayer laminated film or the like according to the present invention, for example, it absorbs sunlight or fluorescent light such as the sun or a fluorescent lamp (mainly It absorbs the visible region from near ultraviolet), blocks or blocks its transmission, and prevents the degradation or alteration of the contents packed in the packaging bag, or the light deterioration such as discoloration, etc. For example, it is desirable to use a mixture of one 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 5.0 wt%, preferably 1.0 wt% to 3.0 wt%, based on 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 light-shielding resin layer or the white resin layer constituting the multilayer laminated film according to the present invention include, for example, sunlight or fluorescent light composed of the sun or a fluorescent lamp. Is used to prevent or degrade the contents filled or packaged in packaging bags, or to prevent light deterioration such as discoloration, etc., specifically, for example, It is desirable to use a mixture of one or more of various colorants such as various white and inorganic dyes and organic dyes and pigments.
In the present invention, as the above-mentioned various white type inorganic or organic dyes, pigments and other colorants, 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 black pigment content when the light-shielding polypropylene resin layer is formed. In the case of forming the resin composition, about 1.0% to 30.0% by weight, preferably about 3.0% to 20.0% by weight is added to the polypropylene resin forming the resin composition. It is desirable to use it.

  Next, in the present invention, when describing each resin composition constituting the multilayer laminated film according to the present invention, first, as the resin composition forming the light-shielding resin layer constituting the multilayer laminated film according to the present invention, 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 black pigments and one or more of the above white pigments are added thereto. And the content of the black pigment is about 0.1% to 20.0% by weight, preferably 1.0% to 10.0% by weight, based on the polyolefin resin. The white pigment content is 1 to 30 times, preferably 3 to 15 times the content of the black pigment, and if necessary, When forming the film, for example, Improved and improved rumm processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant properties, slip properties, mold release properties, flame retardancy, antifungal properties, electrical properties, 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 light-shielding resin layer concerning this can be prepared.

  Next, in the present invention, as the resin composition for forming the barrier resin layer constituting the multilayer laminated film according to the present invention, for example, a barrier resin that blocks or blocks the permeation of oxygen gas or water vapor is used. One or two or more types are the main components of the vehicle, and if necessary, for example, when forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, resistance, One or two kinds of various plastic compounding agents and additives for the purpose of improving and modifying oxidation, slipperiness, releasability, flame retardancy, antifungal property, electrical properties, strength, etc. The resin composition which forms the barrier resin layer based on this invention can be prepared by adding the above arbitrarily, and also adding a solvent, a diluent, etc. if necessary, and kneading sufficiently.

  Furthermore, in the present invention, as the resin composition for forming the white resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above-mentioned polyolefin-based resins are used as the main component of the vehicle. In addition, one or more of the above white pigments are added, and the content of the above white pigment is about 0.5 wt% to 30.0 wt%, preferably 5.0 wt% In addition, it is added at a blending ratio of about 20.0% by weight, and if necessary, for example, when forming the film, for example, film processability, heat resistance, weather resistance, mechanical properties, dimensional stability, antioxidant One or more of various plastic compounding agents and additives for the purpose of improving and modifying properties, slipping properties, mold release properties, flame retardancy, antifungal properties, electrical properties, strength, etc. Is added arbitrarily, and if necessary, a solvent, a diluent, etc. are added. And, sufficiently kneaded, it is possible to prepare a resin composition for forming the white resin layer according to the present invention.

Next, in the present invention, as the resin composition for forming the transparent or translucent resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above-mentioned polyolefin-based resins may 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 properties, strength, etc., one or more kinds of various plastic compounding agents and additives are optionally added, If necessary, a resin composition that forms a transparent or translucent 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 the resin composition forming the transparent or translucent resin layer according to the present invention, for example, in order to conceal the light shielding resin layer, the white resin layer, etc., for example, A resin composition containing at least a polyolefin resin as a main component of a vehicle can be prepared by adding one or more colorants such as chromatic dyes and pigments.
In the above, as colorants such as chromatic dyes / pigments, for example, azo dyes / pigments, anthraquinone dyes / pigments, phthalocyanine dyes / pigments, quinacridone dyes / pigments, dioxazine dyes / pigments, etc. Inorganic pigments such as organic dyes / pigments, yellow lead, chrome vermilion, bitumen, petal, etc. can be used.
Of course, in the present invention, the above-mentioned white pigment can also be used.

  In the present invention, as the resin composition for forming the adhesive resin layer constituting the multilayer laminated film according to the present invention, for example, one or more of the above adhesive resins are used as the main component of the vehicle, In addition, 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, etc. In order to improve and improve antifungal properties, electrical properties, strength, etc., one or more kinds of various plastic compounding agents and additives are optionally added, and if necessary, A resin composition for forming the adhesive 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, 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 adipic acid) ester, ester of sugar sugar sugar and fatty acid, hydrogenated Edible fats and oils, 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 others 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, erucic acid amide, ethylene bis oleyl amide, stearic acid amide, oleic acid amide, methylene bis stearic acid amide, etc., are themselves slippery, 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 polyolefin resin, barrier resin, or adhesive resin. .

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 with respect to 100 parts by weight of polyolefin resin, barrier resin, or adhesive 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. And then using two or more of the resin compositions and then co-extrusion of the resin compositions using, for example, a T-die co-extruder, an inflation co-extruder, etc. And the multilayer laminated film which concerns on this invention can be manufactured.

  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, The resin composition which forms the light-shielding resin layer according to the invention, the resin composition which forms the barrier resin layer according to the invention, the resin composition which forms the white resin layer according to the invention, and the invention A resin composition for forming an adhesive resin layer is prepared, and then the four types of resin compositions are used, and these are used, for example, using a T-die co-extruder, an inflation co-extruder, or the like. The first layer is a white resin layer, the second layer is a light-shielding resin layer, the third layer is an adhesive resin layer, the fourth layer is formed by coextrusion molding and the multilayer laminated film according to the present invention. The layer is a barrier resin layer, the fifth layer is an adhesive resin layer, and Layers, it is possible to produce a multi-layer laminate film consisting of four 6-layer according to the present invention having the structure obtained by sequentially with 6-layer co-extrusion lamination of the white resin layer.

  In the present invention, another specific method for producing the 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 light-shielding resin layer according to the invention, a resin composition for forming a barrier resin layer according to the present invention, and a resin composition for forming a transparent or translucent resin layer according to the present invention; The resin composition for forming the adhesive resin layer according to the present invention is prepared, and then the four types of resin compositions are used. These are used, for example, as a T-die co-extruder, an inflation co-extruder, etc. And the first layer is a transparent or translucent resin composition, the second layer is a light-shielding resin layer, and the third layer. Is an adhesive resin layer, the fourth layer is a barrier resin layer, Manufactured a multilayer laminated film consisting of 4 types and 6 layers according to the present invention, wherein 5 layers are adhesive resin layers, and 6th layer is a laminate of 6 layers in the order of transparent or translucent resin layers. can do.

  Furthermore, in the present invention, another specific method for producing a multilayer laminated film according to the present invention using each resin composition as described above will be described. In the present invention, first, as described above, A resin composition for forming a light-shielding resin layer according to the present invention, a resin composition for forming a barrier resin layer according to the present invention, a resin composition for forming a white resin layer according to the present invention, and the present invention A resin composition for forming the transparent or translucent resin layer and a resin composition for forming the adhesive resin layer according to the present invention are prepared, and then the five types of resin compositions are used. For example, a co-extrusion molding using a T-die co-extrusion machine, an inflation co-extrusion machine, etc., comprising the multilayer laminated film according to the present invention, and the first layer is a transparent or translucent resin composition Product, second layer is white resin layer, third Are the light-shielding resin layer, the fourth layer is the adhesive resin layer, the fifth layer is the barrier resin layer, the sixth layer is the adhesive resin layer, the seventh layer is the white resin layer, and the eighth layer. However, it is possible to produce a multi-layer laminated film composed of five types and eight layers according to the present invention having a constitution in which eight layers are co-extruded and laminated in the order of transparent or translucent resin layers.

The above examples illustrate a few examples of the method for producing a multilayer laminated film according to the present invention, and the present invention is not limited thereto.
In general, when the multilayer laminated film according to the present invention is formed by extrusion using each of the resin compositions as described above, for film formation, for example, at the time of product replacement (purge) Because it is burdened with work such as disassembly and cleaning of an extruder, etc., it is desired to avoid the use of colorants such as pigments in the resin composition, and it is desired to form a film without colorant addition It 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 cannot be avoided. , And a resin composition mainly composed of a transparent or translucent polypropylene-based resin to which no colorant such as a pigment is added is used, whereby a resin film without addition of a colorant such as a pigment is set to 5 μm to 100 μm. It has the advantage of protecting the dirt on the die.
In the present invention, when producing the multilayer laminated film according to the present invention, the light-shielding resin layer, the barrier resin layer, the white resin layer, the transparent or translucent resin layer, etc. The resin composition is used separately and can be coextruded and laminated not only in one layer but also in two or more layers.
Furthermore, 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 coextruded and laminated to form a coextruded multilayer having various forms. A laminated resin film can be designed and manufactured.

Thus, in the present invention, the light-blocking or light-blocking layer composed of the two layers of the light-blocking resin layer and the white resin layer as described above absorbs sunlight or the like in one layer and the other layer. Layers reflect or diffuse sunlight, etc., and synergistic effects of the two layers completely block or block the transmission of sunlight or fluorescent light from the sun or fluorescent lamp, etc. The action and effect of further preventing the degradation or alteration of the contents, or the light deterioration such as discoloration or the like, is increased.
In the present invention, the white resin layer acts as a protective layer that protects the light-shielding resin layer, the barrier resin layer, or the like, or a concealing concealing layer, thereby improving the cosmetic appearance of the packaged product. The effect of achieving can be achieved.
Furthermore, in the present invention, one of the white resin layers described above has a function such as a base layer of a printed pattern layer provided directly or indirectly thereon, and a character constituting the printed pattern layer, Printed images such as figures, symbols, designs, etc. can be made clearer and beautiful printed patterns can be reproduced or manifested. -The effect of having the function as a heat-seal resin layer for forming the seal portion or the like can be achieved.
Further, in the present invention, the above-mentioned barrier resin layer has an action of blocking or blocking permeation of oxygen gas, water vapor, and the like, thereby achieving quality maintenance and prevention of deterioration of contents. is there.
Furthermore, in the present invention, the transparent or translucent resin layer functions as a protective layer for protecting the light-shielding resin layer, the barrier resin layer, the white resin layer or the like, or a concealing layer for concealing. At the same time, one of the transparent or translucent resin layers also has the function of the base layer of the printed pattern layer provided directly or indirectly on the resin layer, and the characters, figures and symbols constituting the printed pattern layer In addition, the printed image such as a pattern or the like is further clarified, and an effect that a beautiful printed pattern can be reproduced or manifested, and the other transparent or translucent resin layer is used at the time of bag making, etc. The effect of having the function as a heat-sealable resin layer for forming a seal portion or the like can be achieved.
In the present invention, the adhesive resin layer exhibits adhesion or adhesion between the barrier resin layer and the light-shielding resin layer, white resin layer, transparent or translucent resin layer, and the like.

Next, in the present invention, the film thickness of the multilayer laminated film according to the present invention is about 20 μm to 220 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 light-shielding resin layer, the film thickness is 3 μm to 30 μm, preferably about 5 μm to 20 μm, The barrier resin layer has a film thickness of 5 μm to 30 μm, preferably about 10 μm to 20 μm, and the white resin layer has a film thickness of 3 μm to 30 μm, preferably about 5 μm to 20 μm. The film thickness is 5 μm to 100 μm, preferably about 10 μm to 80 μm, and the adhesive resin layer preferably has a film thickness of 3 μm to 30 μm, preferably about 5 μm to 20 μm.
In the above, as the film thickness of each layer constituting the co-extruded multilayer laminated resin film according to the present invention, first, as the film thickness of the light-shielding resin layer, if the film thickness is less than 3 μm, the light-shielding or light-shielding layer, etc. This is not preferable because it may cause a problem that the function is greatly affected by thickness unevenness, and if the film thickness exceeds 30 μm, the light shielding property or light shielding property is increased. However, it is not preferable because it is difficult to set and select a white resin layer or the like for concealing it.
Next, when the thickness of the barrier resin layer is less than 5 μm, it is difficult to achieve the effect, and when the thickness is 30 μm, the effect can be achieved. The overall film thickness becomes high, which is not preferable because it is wasted.
Next, if the thickness of the white resin layer is less than 3 μm, it is difficult to conceal the light-shielding resin layer, and the appearance, aesthetics, and the like are reduced, and the white resin layer In the case of providing a printed pattern layer or the like, it is not preferable because the gradation or color tone of the printed pattern layer or the like is affected, and the function as a heat-seal resin layer or the like is further reduced. In addition, when the film thickness exceeds 30 μm, the shielding property of the light-shielding polypropylene-based resin layer is increased, but the overall thickness is increased, and there is a possibility that the influence on the environment as packaging waste may increase. It is not preferable for the reason.
Furthermore, when the film thickness of the transparent or translucent resin layer is less than 5 μm, it is difficult to perform functions such as protection and concealment, and appearance and aesthetics are deteriorated. Furthermore, it is not preferable because the function as a heat-sealable resin layer or the like is lowered, and when the film thickness exceeds 100 μm, the entire layer thickness becomes large, and it is environmentally friendly when discarded. It is not preferable because it is not preferable.
Moreover, if the film thickness of the adhesive resin layer is less than 3 μm, it becomes difficult to achieve the adhesive function, and if the film thickness is 30 μm, the entire layer thickness becomes large and discarded. However, it is not preferable because it is not preferable for environmental measures.

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 permeation of oxygen gas and water vapor, is excellent in heat seal properties, etc., has strength, and has weather resistance, heat resistance, water resistance, laminating -Excellent fastness such as strength, etc., especially light-shielding or light-blocking properties, for example, blocking the transmission of sunlight or fluorescence by the sun or fluorescent lamp, etc., and the contents are decomposed or altered In addition, it is possible to prevent photodegradation such as discoloration, etc., and to have the packaging and storage suitability, storage suitability, etc. of the contents. As extreme It has excellent usability, excellent cosmetics without impairing the packaging appearance, and extremely excellent in disposal and environmental suitability without generating harmful substances when incinerated after use. In addition, it has an advantage that it is easy to detect a metal piece (foreign material) using 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, a heat-sealable resin layer, or the like. 1 type or 2 types or more of various base films such as materials, 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. To produce a laminated material having various forms, and thus to form a bag of the laminated material to form a packaging bag having various forms, etc. It can be applied.

  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, Dry laminate lamination method for arbitrarily laminating a desired base material such as a plastic film through a primer agent layer or a laminating adhesive layer, or a primer agent layer or an anchor coating agent Manufacturing laminated materials in various forms using an extrusion laminating method in which various resins are melt-extruded through layers and the like, and a desired base material is arbitrarily laminated, 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 and the like 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 reasons described above, about 10 μm to 100 μm, preferably about 12 μm to 50 μm is most desirable.
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 film of stretched polypropylene resin.

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 the property of not transmitting light, 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 Films or sheets of resin such as density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, nylon MXD6 Films or sheets of resin, etc., and various colored resin films or sheets having light-shielding properties obtained by adding a colorant such as a pigment to the resin and adding a desired additive to knead to form 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 polyester film, polyamide film, polyolefin film, polyvinyl chloride film, polycarbonate film, polyvinylidene chloride film, 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 inorganic oxide thin film layer 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 inorganic oxide thin film layer 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 of the problem that the material cost is high and the material cost is high, 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 filled and packaged, and the aroma retaining property 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 a high aroma retaining property and a barrier property. 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, etc. are required. For this reason, in the present invention, 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 Adhesives such as adhesives, alkali metal silicates, inorganic adhesives made of low-melting glass, and the like can be used.
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 bonding 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. Use the multilayer laminated film according to the present invention as the inner heat-seal resin layer so that the surfaces of the multilayer laminated film face each other and fold them, or overlap the two sheets, and further the peripheral edge Heat-sealed to provide a seal portion, and 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 products, frozen food, meat products, boiled foods, rice cakes, liquids -Contents consisting of various foods and beverages such as coffee, seasonings and other chemicals, chemicals such as adhesives, adhesives, liquid detergents, etc., cosmetics, pharmaceuticals, miscellaneous goods such as chemical warmers, photosensitive materials, and other articles. Can be filled and packaged.
Thus, in the present invention, in particular, for example, self-supporting bags for filling and packaging soy sauce, sauce, soup, etc., self-supporting bags for filling and packaging fresh confectionery, etc., and packaging clothes for filling and packaging frozen foods 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., and also performing a boil process, a retort process etc. as needed, and can manufacture the packaged product which consists of various forms.
Further, in the present invention, it is particularly useful as a self-supporting bag for filling and packaging articles such as photosensitive materials as industrial materials, for example, films, photosensitive agents, and the like.

Thus, 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, sunlight or fluorescence by the sun or a fluorescent lamp, etc. For example, food and drink containing fats and oils as the contents, for example, can prevent the contents from being decomposed or altered or prevented from causing light deterioration such as discoloration or the like. In the case of a product or the like, it has an advantage that oxidation of oil and fat 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 under the above environment, the fat and oil components are greatly affected by light having a wavelength of 500 nm or less, and have 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, the packaged product manufactured as described above is such that 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. 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), (e), (f), and (e) were prepared.
(I). Resin composition constituting the first layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 100 parts by weight, 0.5 part by weight of synthetic silica, 0.05 part by weight of erucic acid amide, and 0.05 part by weight of ethylenebisoleic acid amide Part by weight was sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting the second layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 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.
(C). Resin composition constituting the third layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (Mitsui Chemicals, trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 73.5 parts by weight, Benzpyrene-free carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25 as a white pigment 0.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(D). Resin composition constituting fourth 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.
(E). Resin composition constituting the fifth layer Ethylene-vinyl alcohol copolymer (EVOH) (manufactured by Kuraray Co., Ltd., trade name, Eval H101, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 min) 100.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(What). Resin composition constituting the sixth layer An adhesive resin composition was prepared in the same manner as described above for the same adhesive resin composition as the resin composition constituting the fourth layer.
(G). Resin composition constituting the seventh layer A resin composition was prepared in the same manner as described above for a resin composition similar to the resin composition constituting the first layer.
(2). Next, using each of the resin compositions prepared above, using a 7-type 7-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition of (a) is 5 μm, (B) The resin composition layer is 20 μm, (c) the resin composition layer is 10 μm, (d) the resin composition layer is 5 μm, (e) the resin composition layer is 15 μm, The present invention comprises a co-extruded inflation film of 7 types and 7 layers with a total thickness of 70 μm, which is co-extruded to form a layer of 5) m of the resin composition of 10) and 10 μm of the layer of the resin composition of A multilayer laminated film according to was manufactured.
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 properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
Furthermore, after the multilayer laminated film is manufactured, the resin can be exchanged smoothly, and the amount of colored pigment retained has been reduced.

(1). First, the following resin compositions (a), (b), (c), (d), (e), (f), and (g) were prepared.
(I). Resin composition constituting the first layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 80.0 parts by weight, titanium oxide 20.0 parts by weight as a white pigment, synthetic silica 0.5 parts by weight, erucamide 0. 05 parts by weight and 0.05 parts by weight of ethylene bisoleic acid amide were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting the second layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 73.5 parts by weight, Benzpyrene-free carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25 as a white pigment 0.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(C). Resin composition constituting the third layer A resin composition was prepared in the same manner as described above for the resin composition similar to the resin composition constituting the first layer.
(D). Resin composition constituting fourth 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.
(E). Resin composition constituting the fifth layer Ethylene-vinyl alcohol copolymer (EVOH) (manufactured by Kuraray Co., Ltd., trade name, Eval H101, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 min) 100.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(What). Resin composition constituting the sixth layer An adhesive resin composition was prepared in the same manner as described above for the same adhesive resin composition as the resin composition constituting the fourth layer.
(G). Resin composition constituting the seventh layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (Mitsui Chemicals, trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 100 parts by weight, 0.5 part by weight of synthetic silica, 0.05 part by weight of erucic acid amide, and 0.05 part by weight of ethylenebisoleic acid amide Part by weight was sufficiently kneaded to prepare a resin composition.
(2). Next, using each resin composition prepared above, using a 7-type 7-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition (a) is 20 μm, The layer of (b) resin composition is 8 μm, the layer of (c) resin composition is 7 μm, the layer of (d) resin composition is 5 μm, the layer of (e) resin composition is 15 μm, The present invention comprises a co-extruded inflation film of 7 types and 7 layers with a total thickness of 70 μm, which is co-extruded to form a layer of 5) m of the resin composition of 10) and 10 μm of the layer of the resin composition of (g). A multilayer laminated film according to was manufactured.
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 properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
Furthermore, after the multilayer laminated film is manufactured, the resin can be exchanged smoothly, and the amount of colored pigment retained has been reduced.

(1). First, the following resin compositions (a), (b), (c), (d), (e), (f), and (e) were prepared.
(I). Resin composition constituting the first layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 100 parts by weight, 0.5 part by weight of synthetic silica, 0.05 part by weight of erucic acid amide, and 0.05 part by weight of ethylenebisoleic acid amide Part by weight was sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting the second layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 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.
(C). Resin composition constituting the third layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (Mitsui Chemicals, trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 73.5 parts by weight, Benzpyrene-free carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25 as a white pigment 0.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(D). Resin composition constituting fourth 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.
(E). Resin composition constituting fifth 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) 100.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(What). Resin composition constituting the sixth layer An adhesive resin composition was prepared in the same manner as described above for the same adhesive resin composition as the resin composition constituting the fourth layer.
(G). Resin composition constituting the seventh layer A resin composition was prepared in the same manner as described above for a resin composition similar to the resin composition constituting the first layer.
(2). Next, using each of the resin compositions prepared above, using a 7-type 7-layer top-blown air-cooled inflation coextrusion film-forming machine, the layer of the resin composition of (a) is 5 μm, (B) The resin composition layer is 20 μm, (c) the resin composition layer is 10 μm, (d) the resin composition layer is 5 μm, (e) the resin composition layer is 15 μm, The present invention comprises a co-extruded inflation film of 7 types and 7 layers with a total thickness of 70 μm, which is co-extruded to form a layer of 5) m of the resin composition of 10) and 10 μm of the layer of the resin composition of A multilayer laminated film according to was manufactured.
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 properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
Furthermore, after the multilayer laminated film is manufactured, the resin can be exchanged smoothly, and the amount of colored pigment retained has been reduced.

(1). First, the following resin compositions (a), (b), (c), (d), (e), (f), and (g) were prepared.
(I). Resin composition constituting the first layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 80.0 parts by weight, titanium oxide 20.0 parts by weight as a white pigment, synthetic silica 0.5 parts by weight, erucamide 0. 05 parts by weight and 0.05 parts by weight of ethylene bisoleic acid amide were sufficiently kneaded to prepare a resin composition.
(B). Resin composition constituting the second layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 73.5 parts by weight, Benzpyrene-free carbon black 1.5 parts by weight as a black pigment, and titanium oxide 25 as a white pigment 0.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(C). Resin composition constituting the third layer (middle core layer) Maleic anhydride-modified adhesive polyethylene (Mitsui Chemicals, trade name, Adma-NF528) 100.0 parts by weight was sufficiently kneaded to provide adhesiveness. A resin composition was prepared.
(D). Resin composition constituting the fourth layer ethylene-vinyl alcohol copolymer (EVOH) (manufactured by Kuraray Co., Ltd., trade name, Eval H101, density = 1.17 g / cm ³ , melt flow rate, MFR = 1 .6 g / 10 min) 100.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(E). Resin composition constituting fifth 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) 100.0 parts by weight were sufficiently kneaded to prepare a resin composition.
(What). Resin composition constituting the sixth layer An adhesive resin composition was prepared in the same manner as described above for the same adhesive resin composition as the resin composition constituting the third layer.
(G). Resin composition constituting the seventh layer Ethylene-1 / olefin copolymer copolymerized using a single site catalyst (metallocene catalyst) (Mitsui Chemicals, trade name, Evolu-SP2020, density = 0. 916 g / cm ³ , melt flow rate, MFR = 1.5 g / 10 min) 100 parts by weight, 0.5 part by weight of synthetic silica, 0.05 part by weight of erucic acid amide, and 0.05 part by weight of ethylenebisoleic acid amide Part by weight was sufficiently kneaded to prepare a resin composition.
(2). Next, using each of the resin compositions prepared above, using a 7-type 7-layer top-blown air-cooled inflation co-extrusion 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, (c) a layer of the resin composition of 5 μm, (d) a layer of the resin composition of 10 μm, (e) a layer of the resin composition of 10 μm, The present invention comprises a co-extruded inflation film of 7 types and 7 layers with a total thickness of 70 μm, which is co-extruded to form a layer made of the resin composition of 5) and 5 μm of the resin composition of 10 A multilayer laminated film according to was manufactured.
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 properties were sufficient, and each wavelength resulting from the oxidation of fats and oils was hardly transmitted, which was very good.
Moreover, the oxygen barrier property was also good and suitable for protecting the contents.
Furthermore, after the multilayer laminated film is manufactured, the resin can be exchanged smoothly, and the amount of colored pigment retained has been reduced.

(Experimental example)
About the multilayer laminated film which concerns on said Examples 1-4, (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 │ Total light transmittance │ │ │ (μm) │ (cc / m ²・ day ・ atm) │ (%) │ ├────┼────┼───────────────┼── ──────┤ │Example 1│ 70 │ 1.5 │ 0.3 │ ├────┼────┼───────────────┼── ───────┤ │Example 2│ 70 │ 1.5 │ 0.3 │ ├────┼────┼───────────────┼ ────────┤ │Example 3│ 70 │ 0.7 │ 0.3 │ ├────┼────┼──────────────── │────────┤ │Example 4│ 70 │ 0.2 │ 0.2 │ └────┴────┴─────────────── ─ ┴────────┘
┌────┬─────────────────┐ │ │ Shading (%) │ │ ├─────┬─────┬──── ─┤ │ │500 nm │550 nm │650 nm│ ├────┼─────┼─────┼─────┤ │Example 1│ 0.1 │ 0.2 │ 0.5 │ ├────┼─────┼─────┼─────┤ │Example 2│ 0.1 │ 0.2 │ 0.6 │ ├────┼── ───┼─────┼ ─────┤ │Example 3│ 0.1 │ 0.2 │ 0.5 │ ├────┼─────┼─────実 施 ─────┤ │Example 4│ 0.0 │ 0.1 │ 0.3 │ └────┴─────┴─────┴─────┘

  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 and excellent oxygen barrier properties, and is sufficiently practical.

(Reference Example 1)
(1). The surface of the seventh layer of the multilayer laminated film according to the present invention produced in Example 1 is subjected to corona treatment, and then, on the surface of the corona treatment, a two-component curable urethane adhesive (main agent: polyester polyol) And curing agent: aliphatic socyanate), and this is coated to a thickness of 4.0 g / m ² (in a dry state) using a gravure roll coating method, and an adhesive for laminating 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, and the present invention. The laminated material which concerns on was manufactured.
(2). Next, using the laminated material produced above, then cut out a front plate, a rear plate made of 100 mm × 150 mm, and an 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 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 described above, the snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal portion, so that the self-supporting property according to the present invention is achieved. A packaged product using bags was produced.
In the packaged product produced above, no leakage, overturning, buckling, etc. were observed, and no drop, leakage, etc. were observed when the drop test from 1.2 m was performed 5 times. .
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 seventh layer was subjected to corona discharge treatment, and then the two-part curable urethane adhesive (main agent) was applied to the corona-treated surface. : Polyester polyol, Curing agent: Aliphatic socyanate), and coating this with a gravure roll coat method to a thickness of 4.0 g / m ² (dry), and laminating adhesion An agent layer is formed, and thereafter, a biaxially stretched nylon 6 film having a thickness of 15 μm is superposed on the surface of the adhesive layer for laminating with the corona-treated surfaces facing each other, and then both are laminated with a dry laminate. And laminated.
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-deposited film is laminated on the laminating adhesive layer surface with the silicon-oxide vapor-deposited film surface facing each other. Then, both were laminated by dry lamination 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, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. A semi-finished packaging product is manufactured, and then the semi-finished packaging product is placed in a retort kettle and subjected to retort treatment under conditions of temperature, 120 ° C., pressure, 2.1 kgf / cm ² · G, time, 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 with excellent storage stability and the ability to fill and package 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 seventh layer of the multilayer laminated film according to the present invention produced in Example 3 is subjected to a corona treatment, and then a two-component curable urethane adhesive (main component: polyester polyol) on the corona treatment surface. And curing agent: aliphatic socyanate), and this is coated to a thickness of 4.0 g / m ² (in a dry state) using a gravure roll coating method, and an adhesive for laminating A layer was formed, and then a 20 μm-thick biaxially stretched polypropylene film was bonded to the surface of the laminating 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 manufactured above, snack confectionery is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal part. The 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 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 seventh layer was subjected to corona discharge treatment, and then the two-component curable urethane adhesive (main agent) was applied to the corona treated surface. : Polyester polyol, Curing agent: Aliphatic socyanate), and coating this with a gravure roll coat method to a thickness of 4.0 g / m ² (dry), and laminating adhesion An agent layer is formed, and thereafter, a biaxially stretched nylon 6 film having a thickness of 15 μm is superposed on the surface of the adhesive layer for laminating with the corona-treated surfaces facing each other, and then both are laminated with a dry laminate. And laminated.
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-deposited film is laminated on the laminating adhesive layer surface with the silicon-oxide vapor-deposited film surface facing each other. Then, both were laminated by dry lamination 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, water is filled and packaged from the opening, and then the opening is heat sealed to form the upper seal. A semi-finished packaging product is manufactured, and then the semi-finished packaging product is placed in a retort kettle and subjected to retort treatment under conditions of temperature, 120 ° C., pressure, 2.1 kgf / cm ² · G, time, 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 with excellent storage stability and the ability to fill and package 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 or a heat-sealable resin layer, etc. 1 or 2 or more kinds of various base films such as a material, a barrier base material that prevents permeation of oxygen gas or water vapor, cellophane, woven or non-woven fabric, glass plate, etc. Can be applied to uses such as packaging materials constituting packaging bags and the like 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 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 Multi-layer laminated film A ₁ Multi-layer laminated film A ₂ Multi-layer laminated film A ₃ Multi-layer laminated film A ₄ Multi-layer laminated film B Laminated material C Packaging bag D Packaging product 1 Coextrusion multilayer laminated resin film 2 Light-shielding resin layer 3 Barrier resin Layer 4 White resin layer 5 Transparent or translucent resin layer 11 Substrate film 12 Print pattern layer 21 Side seal part 22 Bottom seal part 23 Opening part 24 Contents 25 Upper seal part

Claims (16)

A multilayer laminated film comprising a coextruded laminated film including at least a light shielding resin layer and a barrier resin layer. 2. The multilayer laminated film according to claim 1, wherein the light-shielding resin layer is formed by laminating a white resin layer and / or a transparent or translucent resin layer on the other surface. The multilayer laminate according to any one of claims 1 to 2, wherein the barrier resin layer comprises a white resin layer and / or a transparent or translucent resin layer laminated on the other surface. the film. The multilayer laminated film according to any one of claims 1 to 3, wherein the barrier resin layer is laminated on the interface via an adhesive resin layer. The light-shielding resin layer contains a polyolefin resin as a main component, further contains a black pigment and a white pigment, and the content of the black pigment is from 0.1% by weight to the polyolefin resin. 20.0% by weight, and the content of the white pigment is a light-shielding resin layer of a resin composition comprising 1 to 30 times the content of the black pigment. Item 5. The multilayer laminated film according to any one of Items 1 to 4. 6. The barrier resin layer according to claim 1, wherein the barrier resin layer comprises a 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. A multilayer laminated film described in 1. The white resin layer contains a polyolefin resin as a main component, further contains a white pigment, and the content of the white pigment is from 0.5% by weight to 30.0% by weight with respect to the polyolefin resin. It consists of a white resin layer by the resin composition which becomes, The multilayer laminated film described in any one of Claims 1-6 characterized by the above-mentioned. The transparent or translucent resin layer is composed of a transparent or translucent resin layer made of a resin composition containing a polyolefin-based resin as a main component, according to any one of the above 1 to 7 features. Multi-layer laminated film. 9. The multilayer laminated film according to claim 1, wherein the light-shielding resin layer has a thickness of 3 μm to 30 μm. 10. The multilayer laminated film according to claim 1, wherein the barrier resin layer has a thickness of 5 μm to 30 μm. 11. The multilayer laminated film according to claim 1, wherein the white resin layer has a thickness of 3 μm to 30 μm. The multilayer laminated film according to any one of claims 1 to 11, wherein the transparent or translucent resin layer has a thickness of 5 µm to 100 µm. The multilayer laminated film according to any one of claims 1 to 12, wherein the polyolefin resin comprises a polyethylene resin, a polypropylene resin, or a modified resin thereof. The multilayer laminated film according to any one of claims 1 to 13, wherein the barrier resin comprises an ethylene-vinyl alcohol copolymer or a nylon MXD6 resin. The multilayer according to any one of claims 1 to 14, wherein the black pigment comprises one or more of black pigments comprising iron black, graphite, or carbon black. Laminated film. 1 of white pigments in which the white pigment is composed of basic lead carbonate, basic lead sulfate, basic lead silicate, zinc white, zinc sulfide, lithopone, antimony trioxide, anatase-type titanium oxide, or rutile-type titanium oxide. The multilayer laminated film according to any one of claims 1 to 15, wherein the multilayer laminated film comprises seeds or two or more kinds.

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