WO2016181827A1 - Laminate for packaging having ultraviolet absorption layer - Google Patents

Laminate for packaging having ultraviolet absorption layer Download PDF

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Publication number
WO2016181827A1
WO2016181827A1 PCT/JP2016/063063 JP2016063063W WO2016181827A1 WO 2016181827 A1 WO2016181827 A1 WO 2016181827A1 JP 2016063063 W JP2016063063 W JP 2016063063W WO 2016181827 A1 WO2016181827 A1 WO 2016181827A1
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Prior art keywords
layer
polyolefin
laminate
packaging
ultraviolet
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PCT/JP2016/063063
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French (fr)
Japanese (ja)
Inventor
恭平 高橋
白根　隆志
山本　光
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共同印刷株式会社
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Priority to JP2017517870A priority Critical patent/JP6789213B2/en
Publication of WO2016181827A1 publication Critical patent/WO2016181827A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes

Definitions

  • the present invention relates to a packaging laminate having an ultraviolet absorbing layer.
  • the present invention relates to a transparent laminate for laminated tubes having an ultraviolet absorbing layer that can suppress bleed out of an organic ultraviolet absorber and can be easily manufactured.
  • a package with an ultraviolet absorbing layer for preventing the contents from being deteriorated by ultraviolet rays is conventionally known.
  • an application type package with an ultraviolet absorbing layer using a coating layer containing an ultraviolet absorber and a kneaded type package with an ultraviolet absorbing layer in which an ultraviolet absorber is kneaded in a resin binder The body can be mentioned.
  • Patent Document 1 discloses a package including polyethylene and an ultraviolet absorber in the outermost heat seal layer.
  • Patent Document 3 discloses a laminate including (a) a layer made of a thermoplastic resin and (b) a layer made of a thermoplastic resin containing an ultraviolet absorber. Here, (b) Sandwich layers.
  • JP 2002-068222 A Japanese Patent Laid-Open No. 9-239889 Japanese Patent Laid-Open No. 7-040954
  • the oxygen atom-containing thermoplastic resin used for the migration blocking layer of the ultraviolet absorber is expensive. Moreover, it is necessary to adhere
  • the easy-adhesive resin used at this time is relatively difficult to manufacture because it involves complicated processing such as that the mold cannot be easily washed. Furthermore, when this laminated body is used for a packaging body and a heat seal layer is laminated on the surface, the number of laminated layers also increases.
  • the laminate described in Patent Document 3 also does not have heat sealability because a polyester resin or the like is used for the (a) layer made of a thermoplastic resin, and the laminate is used on the surface to be used for a package. If it is going to laminate
  • ⁇ Aspect 5 The packaging laminate according to any one of aspects 1 to 4, wherein an adhesive for dry lamination does not exist between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. .
  • ⁇ Aspect 6 The laminate strength of the first polyolefin layer and the ultraviolet absorbing layer, and the laminate strength of the ultraviolet absorbing layer and the second polyolefin layer are 5.0 N / 15 mm or more, respectively.
  • ⁇ Aspect 7 The packaging laminate according to any one of aspects 1 to 6, further comprising a base material layer and a heat seal layer in this order, which are laminated on the second polyolefin layer.
  • ⁇ Aspect 8 A packaging laminate, wherein the base material layer is sandwiched between the second polyolefin layers of the two packaging laminates according to any one of aspects 1 to 6.
  • ⁇ Aspect 9 The laminate for packaging according to aspect 7 or 8, wherein the light transmittance at a wavelength of 380 nm is 10% or less and the light transmittance at a wavelength of 450 nm is 75% or more.
  • ⁇ Aspect 10 A tube packaging body formed using the packaging laminate according to any one of Embodiments 7 to 9.
  • the present invention it is possible to provide a packaging laminate having an ultraviolet absorbing layer that can suppress bleed-out of an organic ultraviolet absorber and can be easily manufactured.
  • FIG. 1 illustrates the packaging laminate of the present invention.
  • the packaging laminate of the present invention includes a first polyolefin layer, an ultraviolet absorbing layer containing an organic ultraviolet absorber and polyolefin, and a second polyolefin layer in this order.
  • the thickness of each of the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer is more than 25 ⁇ m, and the content of the organic ultraviolet absorber is 0.01 with respect to the ultraviolet absorbing layer. ⁇ 2.0% by weight.
  • the ultraviolet absorbing layer is made relatively thick while the bleed-out is suppressed by reducing the concentration of the ultraviolet absorber contained in the ultraviolet absorbing layer, and the ultraviolet absorbing performance is not lowered.
  • the polyolefin layer can function as an ultraviolet absorber migration-preventing layer.
  • the laminated body of this invention can raise the adhesive strength between these layers by making the density
  • the laminate of the present invention is preferably transparent, whereby the inside of the package produced using this laminate can be visually confirmed.
  • the laminate of the present invention has a light transmittance at a wavelength of 450 nm of 75% or more, 80% or more, or 85% or more when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation). is there.
  • the laminate of the present invention does not transmit ultraviolet rays.
  • the laminate of the present invention has a light transmittance at a wavelength of 380 nm of 20% or less, 10% or less, or 7% or less when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation). is there.
  • the laminate of the present invention has a light transmittance at a wavelength of 350 nm of 5.0% or less, 3.0% or less when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation) Or 1.0% or less.
  • a polyurethane-based adhesive, an acrylic resin-based adhesive, an epoxy resin-based adhesive, and a silicone resin-based adhesive are interposed between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. Preferably it is not present.
  • the laminate strength between the first polyolefin layer and the ultraviolet absorbing layer, and the laminate strength between the ultraviolet absorbing layer and the second polyolefin layer are measured by using a graph VE10D (Toyo Seiki Seisakusho Co., Ltd.) by the T-shaped peel test method.
  • a graph VE10D Toyo Seiki Seisakusho Co., Ltd.
  • it is preferably 5.0 N / 15 mm or more, 7.0 N / 15 mm or more, or 10.0 N / 15 mm or more, respectively.
  • the laminate of the present invention may further have a base material layer on the second polyolefin layer side in order to give an appropriate stiffness as a package.
  • the laminated body of this invention may have a heat seal layer in the opposite surface to the 2nd polyolefin layer of a base material layer.
  • the base material layer may be sandwiched between two laminates of the present invention.
  • this laminate also has high ultraviolet absorptivity, it does not generate bleed-out, can be easily formed by giving a waist to the package and heat-sealing it in a cylindrical shape. It is advantageous.
  • the laminate of the present invention may have other layers as long as the effects of the present invention are not substantially impaired, for example, an adhesive layer, a printed layer, an anchor coat layer, a primer layer, etc. Also good.
  • the laminate of the present invention may have a total thickness of all layers of 100 ⁇ m or more, 150 ⁇ m or more, 200 ⁇ m or more, 250 ⁇ m or more, or 300 ⁇ m or more, and is 800 ⁇ m or less, 600 ⁇ m or less, or 500 ⁇ m or less. There may be.
  • FIG. 1A illustrates a laminate according to one embodiment of the present invention.
  • This laminated body (10) is comprised from the 1st polyolefin layer (1), the ultraviolet absorption layer (3), and the 2nd polyolefin layer (2).
  • FIG. 1 (b) illustrates a laminate (10) of one embodiment of the present invention comprising a substrate layer (4) and a heat seal layer (5).
  • FIG. 1 (c) illustrates a laminate (10) of one embodiment of the present invention in which the substrate layer (4) is sandwiched by the two laminates of FIG. 1 (a). . This is also considered that the laminated body of Fig.1 (a) is used as the heat seal layer (5) of FIG.1 (b).
  • the ultraviolet absorbing layer used in the laminate of the present invention contains an organic ultraviolet absorber and polyolefin. This layer has a thickness of more than 25 ⁇ m, and the content of the organic ultraviolet absorber is 0.01 to 2.0% by weight in this layer.
  • the ultraviolet absorbing performance can be maintained by reducing the concentration of the ultraviolet absorber to suppress bleed-out and securing the thickness.
  • the thickness of this layer may be, for example, 30 ⁇ m or more, 40 ⁇ m or more, 50 ⁇ m or more, 60 ⁇ m or more, 70 ⁇ m or more, 100 ⁇ m or more, or 130 ⁇ m or more, or 300 ⁇ m or less, 250 ⁇ m or less, or 200 ⁇ m or less.
  • the thickness described here means the total thickness thereof.
  • the content of the organic ultraviolet absorber may be, for example, 0.01% by weight or more, 0.05% by weight or more, 0.1% by weight or more, 0.25% by weight or more, or 0.5% by weight or more. It may be 2.0% by weight or less, 1.8% by weight or less, 1.5% by weight or less, 1.2% by weight or less, or 1.0% by weight or less.
  • the content of the organic ultraviolet absorber is particularly 0.10% by weight to 1.5% by weight, and particularly preferably 0.25% by weight to 1.0% by weight.
  • the organic ultraviolet absorber is not particularly limited as long as it is an organic compound that absorbs ultraviolet rays, but benzotriazole compounds, benzophenone compounds, triazine compounds, cyanoacrylate compounds, oxanilide compounds, salicylate compounds, formamidines. And benzotriazole compounds can be used.
  • polyolefins examples include polyolefins suitable for forming an ultraviolet absorbing layer by sandwich lamination, and particularly polyethylene and polypropylene.
  • Polyethylene includes low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid.
  • EMA ethylene-ethyl acrylate copolymer
  • EMA ethylene-methyl acrylate copolymer
  • EVA ethylene vinyl acetate copolymer
  • carboxylic acid modified polyethylene carboxylic acid modified ethylene vinyl acetate
  • examples include copolymers, ionomers, and derivatives thereof, and mixtures thereof.
  • polypropylene include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, carboxylic acid-modified polypropylene, and derivatives thereof, and mixtures thereof.
  • the ultraviolet absorbing layer may contain other additives or may contain an inorganic ultraviolet absorber as long as the effects of the present invention are not substantially impaired.
  • the first polyolefin layer and the second polyolefin layer both have a thickness of more than 25 ⁇ m, thereby suppressing bleeding out of the ultraviolet absorber.
  • Both the first polyolefin layer and the second polyolefin layer are preferably heat-sealable.
  • the thickness is more than 25 ⁇ m because the film formation is easily stabilized.
  • the thickness of the first polyolefin layer and the second polyolefin layer used in the present invention is preferably more than 25 ⁇ m.
  • polyolefin used in these layers examples include the same types as the polyolefin that can be used in the ultraviolet absorbing layer.
  • the polyolefin used in the first polyolefin layer and the second polyolefin layer is the same type of polyolefin as the polyolefin used in the ultraviolet absorbing layer.
  • the polyolefin used in the first polyolefin layer and the second polyolefin layer is not an oxygen atom-containing polyolefin.
  • the polyolefin used in the first polyolefin layer and the second polyolefin layer has an ethylene group repeating unit of 50 mol% or more, 60 mol% or more, 70 mol% or more, 80 mol% or more, or 90 mol in the main chain of the polymer.
  • % which is a resin containing 30 mol% or more, 40 mol% or more, 50 mol% or more, 60 mol% or more, 70 mol% or more, or 80 mol% or more of a repeating unit of propylene group in the main chain of the polymer.
  • the thickness of the base material layer is not particularly limited as long as the above-described object can be achieved, but may be, for example, 5 ⁇ m or more, 8 ⁇ m or more, or 10 ⁇ m or more, and 100 ⁇ m or less, 50 ⁇ m or less, 30 ⁇ m or less, or 20 ⁇ m or less It may be.
  • the heat seal layers are not particularly limited as long as they can be bonded by being pressed against each other and brought to a temperature in the range of 80 to 250 ° C.
  • it is not particularly limited as long as it is a layer that can be heat-sealed for 1.0 second under conditions of 140 ° C. and 0.2 MPa and can be bonded with strength useful as a package.
  • heat seal layer examples include a polyolefin layer, and the same types as those of the polyolefin that can be used in the ultraviolet absorbing layer.
  • the heat seal layer is preferably capable of printing on its surface.
  • the printing is preferably performed with UV ink.
  • cello tape registered trademark
  • the printed part is preferably not peeled off.
  • Printing can be performed by, for example, flexographic printing, resin letterpress printing, or the like.
  • a batch kneader such as a kneader, a Banbury mixer, a mixing roll, or a continuous kneader such as a biaxial kneader can be used.
  • a batch kneader such as a kneader, a Banbury mixer, a mixing roll, or a continuous kneader such as a biaxial kneader
  • it can be performed at 100 ° C. or higher, 120 ° C. or higher, or 140 ° C. or higher, and can be kneaded at a temperature of 220 ° C. or lower, 200 ° C. or lower, or 180 ° C. or lower. it can.
  • the above-described packaging laminate having upper and lower surfaces that are heat-sealable is formed into a cylindrical shape, and the cylindrical formed body is formed by heat-sealing the upper and lower layers. And the both ends of the obtained cylindrical molded object can be sealed, and a package can be obtained.
  • a shoulder portion may be formed on one side of the cylindrical molded body so that a cap can be attached, and components constituting the shoulder portion may be attached to the cylindrical molded body.
  • the package of the present invention can contain contents such as solid, liquid, gel and the like.
  • the package of the present invention can contain contents such as foods, chemicals, cosmetics, and detergents, and particularly can contain cosmetics.
  • an ultraviolet absorbing layer of 70 ⁇ m or less it was formed by sandwich lamination with the first and second polyolefin layers.
  • the laminated body having the ultraviolet absorbing layer is formed by extruding the ultraviolet absorbing layer once to the second polyolefin layer, and finally the laminated body and the first polyolefin layer are formed. Then, the molten resin composition containing the ultraviolet absorber and polyolefin was sandwich-laminated to ensure the thickness of the ultraviolet absorbing layer.
  • the amount of the dry laminate adhesive applied was 3.5 g / m 2 .
  • Example 4 instead of the heat seal layer, a laminate in which an ultraviolet absorbing layer was sandwich-laminated with first and second polyolefin layers was used.
  • the laminated body of Example 4 includes two ultraviolet absorbing layers, but the ultraviolet absorber concentration is the same for the two ultraviolet absorbing layers.
  • a pattern was printed by flexographic printing using UV ink to form a tube-shaped package. The pattern is printed on the heat seal layer in Examples 1 to 3, Examples 5 to 6 and Comparative Example 1; in Examples 4 and 7, it is printed on the first polyolefin layer; In 2, it went to the ultraviolet absorbing layer.
  • the laminated body of Example 7 was produced, without using PET film which is a base material layer.
  • ⁇ when the transmittance is 3% or less For a wavelength of 350 nm, ⁇ when the transmittance is 3% or less, ⁇ when the transmittance is more than 3% and 5% or less, and x when the transmittance is more than 5%;
  • ⁇ when the transmittance is more than 10% and 20% or less
  • ⁇ when the transmittance is more than 20%
  • x for a wavelength of 450 nm, the transmittance is 75%
  • ⁇ when the transmittance is more than 10% and 20% or less
  • ⁇ when the transmittance is more than 20%
  • the laminate strength of the first polyolefin layer, the ultraviolet absorbing layer and the second polyolefin layer was measured using a T-peeling test method using a strograph VE10D (Toyo Seiki Seisakusho Co., Ltd.). Using, the distance between the gripping jigs was 50 mm, and the tensile speed was 300 mm / min.
  • the laminate strength was 5.0 N / 15 mm or more, the interlayer strength was evaluated as ⁇ , and when the laminate strength was less than 5.0 N / 15 mm, the interlayer strength was evaluated as x.

Abstract

The present invention provides a laminate for packaging having an ultraviolet absorption layer, which is able to be easily produced and is capable of suppressing bleeding of an organic ultraviolet absorbent. The present invention relates to a laminate for packaging (10), which sequentially comprises a first polyolefin layer (1), an ultraviolet absorption layer (3) containing an organic ultraviolet absorbent and a polyolefin, and a second polyolefin layer (2) in this order, and wherein the thicknesses of the first polyolefin layer (1), the ultraviolet absorption layer (3) and the second polyolefin layer (2) are more than 25 μm, respectively; and the content of the organic ultraviolet absorbent is 0.01-2.0% by weight relative to the ultraviolet absorption layer (3).

Description

紫外線吸収層を有する包装用積層体Laminate for packaging having ultraviolet absorbing layer
　本発明は、紫外線吸収層を有する包装用積層体に関する。特に、本発明は有機系紫外線吸収剤のブリードアウトを抑制でき、容易に製造することができる、紫外線吸収層を有する透明なラミネートチューブ用積層体に関する。 The present invention relates to a packaging laminate having an ultraviolet absorbing layer. In particular, the present invention relates to a transparent laminate for laminated tubes having an ultraviolet absorbing layer that can suppress bleed out of an organic ultraviolet absorber and can be easily manufactured.
　内容物を紫外線による劣化から防ぐための紫外線吸収層付の包装体は従来から知られている。このような包装体としては、紫外線吸収剤を含有するコーティング層を用いた塗布型の紫外線吸収層付包装体と、紫外線吸収剤を樹脂バインダー中に混練させた練込型の紫外線吸収層付包装体とを挙げることができる。 A package with an ultraviolet absorbing layer for preventing the contents from being deteriorated by ultraviolet rays is conventionally known. As such a package, an application type package with an ultraviolet absorbing layer using a coating layer containing an ultraviolet absorber, and a kneaded type package with an ultraviolet absorbing layer in which an ultraviolet absorber is kneaded in a resin binder The body can be mentioned.
　練込型の紫外線吸収層付包装体として、特許文献１では、最外層のヒートシール層にポリエチレン及び紫外線吸収剤を含む包装体を開示している。 As a kneaded-type package with an ultraviolet absorbing layer, Patent Document 1 discloses a package including polyethylene and an ultraviolet absorber in the outermost heat seal layer.
　特許文献２では、ベンゾトリアゾールである紫外線吸収剤とポリエチレンとを含む紫外線吸収層を有する、包装用積層体を開示している。ここでは、紫外線吸収剤の表面へのブリードアウト（粉ふき）を抑制するために、紫外線吸収層に移行阻止層を積層させている。移行阻止層としては、酸素原子含有熱可塑性樹脂層、特にナイロン（Ｎｙ）、エチレン－ビニルアルコール共重合体（ＥＶＯＨ）等を用いている。移行阻止層には、さらにポリエチレンフィルムをドライラミネートによって積層して、包装体をヒートシールできるようにしている。 Patent Document 2 discloses a laminate for packaging having an ultraviolet absorbing layer containing a UV absorber that is benzotriazole and polyethylene. Here, in order to suppress bleed-out (powdering) to the surface of the ultraviolet absorbent, a transition blocking layer is laminated on the ultraviolet absorbent layer. As the migration preventing layer, an oxygen atom-containing thermoplastic resin layer, particularly nylon (Ny), ethylene-vinyl alcohol copolymer (EVOH), or the like is used. A polyethylene film is further laminated by dry lamination on the transition prevention layer so that the package can be heat sealed.
　特許文献３は、熱可塑性樹脂からなる（ａ）層と紫外線吸収剤を含む熱可塑性樹脂からなる（ｂ）層とを含む積層体を開示しており、ここでは（ａ）層によって（ｂ）層をサンドイッチしている。 Patent Document 3 discloses a laminate including (a) a layer made of a thermoplastic resin and (b) a layer made of a thermoplastic resin containing an ultraviolet absorber. Here, (b) Sandwich layers.
特開２００２－０６８２２２号公報JP 2002-068222 A 特開平９－２３９８８９号公報Japanese Patent Laid-Open No. 9-239889 特開平７－０４０９５４号公報Japanese Patent Laid-Open No. 7-040954
　特許文献１に記載の発明では、表面層に紫外線吸収剤を含有させるため、有機系の紫外線吸収剤を用いた場合に特に、容易にブリードアウトしてしまう。その場合、包装体にする前の積層体の状態でロールにしたときに、内容物が接する内層側にまで紫外線吸収剤が移行する場合がある。また、外層側の表面に紫外線吸収剤がブリードアウトすると、印刷をしようとしてもインキ密着性が低くなり、印刷が困難になる。 In the invention described in Patent Document 1, since an ultraviolet absorber is contained in the surface layer, bleeding easily occurs particularly when an organic ultraviolet absorber is used. In that case, when it is set as a roll in the state of the laminated body before making it into a package, the ultraviolet absorbent may be transferred to the inner layer side in contact with the contents. Further, when the ultraviolet absorber bleeds out on the surface on the outer layer side, the ink adhesion is lowered even if printing is attempted, and printing becomes difficult.
　特許文献２に記載の発明では、紫外線吸収剤の移行阻止層に用いる酸素原子含有熱可塑性樹脂が高価である。また、紫外線吸収層と移行阻止層とは、接着剤を用いたドライラミネート又は易接着性樹脂によって接着させる必要がある。この際に使用する易接着性樹脂は、金型の洗浄が容易ではない等の加工の煩雑性も伴うため、製造が比較的困難である。さらに、この積層体を包装体に用いるために表面にヒートシール層を積層しようとすると、積層数も多くなってしまう。 In the invention described in Patent Document 2, the oxygen atom-containing thermoplastic resin used for the migration blocking layer of the ultraviolet absorber is expensive. Moreover, it is necessary to adhere | attach an ultraviolet absorption layer and a transfer prevention layer by the dry lamination using an adhesive agent, or easily adhesive resin. The easy-adhesive resin used at this time is relatively difficult to manufacture because it involves complicated processing such as that the mold cannot be easily washed. Furthermore, when this laminated body is used for a packaging body and a heat seal layer is laminated on the surface, the number of laminated layers also increases.
　特許文献３に記載の積層体も、熱可塑性樹脂からなる（ａ）層にポリエステル樹脂等が用いられるためにヒートシール性を有しておらず、この積層体を包装体に用いるために表面にヒートシール層を積層しようとすると積層数も多くなってしまう。 The laminate described in Patent Document 3 also does not have heat sealability because a polyester resin or the like is used for the (a) layer made of a thermoplastic resin, and the laminate is used on the surface to be used for a package. If it is going to laminate | stack a heat seal layer, the number of lamination will also increase.
　そこで、本発明は、有機系紫外線吸収剤のブリードアウトを抑制でき、容易に製造することができる、紫外線吸収層を有する包装用積層体を提供することを目的とする。 Therefore, an object of the present invention is to provide a packaging laminate having an ultraviolet absorbing layer that can suppress bleed-out of an organic ultraviolet absorber and can be easily manufactured.
　本発明者らは、以下の態様を有する本発明によって、上記課題を解決できることを見出した。
《態様１》
　第１のポリオレフィン層、有機系紫外線吸収剤及びポリオレフィンを含む紫外線吸収層、及び第２のポリオレフィン層をこの順に含む、包装体用積層体であって、
　前記第１のポリオレフィン層、前記紫外線吸収層、及び前記第２のポリオレフィン層の厚さが、それぞれ２５μｍ超であり、かつ
　前記有機系紫外線吸収剤の含有量が、前記紫外線吸収層に対して０．０１～２．０重量％である、包装用積層体。
《態様２》
　前記第１のポリオレフィン層及び前記第２のポリオレフィン層の厚さがそれぞれ３０μｍ以上である、態様１に記載の包装用積層体。
《態様３》
　前記紫外線吸収層の厚さが６０μｍ以上であり、かつ前記有機系紫外線吸収剤の含有量が、前記紫外線吸収層に対して０．２５～１．０重量％である、態様１又は２に記載の包装用積層体。
《態様４》
　前記第１のポリオレフィン層、前記紫外線吸収層、及び前記第２のポリオレフィン層の厚さの合計が、２００μｍ以上５００μｍ以下である、態様１～３のいずれか一項に記載の包装用積層体。
《態様５》
　前記第１のポリオレフィン層、紫外線吸収層、及び前記第２のポリオレフィン層の間に、ドライラミネート用の接着剤が存在していない、態様１～４のいずれか一項に記載の包装用積層体。
《態様６》
　前記第１のポリオレフィン層と前記紫外線吸収層とのラミネート強度、及び前記紫外線吸収層と前記第２のポリオレフィン層とのラミネート強度が、それぞれ５．０Ｎ／１５ｍｍ以上である、態様１～５のいずれか一項に記載の包装用積層体。
《態様７》
　前記第２のポリオレフィン層に積層して、さらに基材層及びヒートシール層をこの順に含む、態様１～６のいずれか一項に記載の包装用積層体。
《態様８》
　基材層が、態様１～６のいずれか一項に記載の２枚の包装用積層体の前記第２のポリオレフィン層によってサンドイッチされている、包装用積層体。
《態様９》
　波長３８０ｎｍの光線透過率が１０％以下であり、かつ波長４５０ｎｍの光線透過率が７５％以上である、態様７又は８に記載の包装用積層体。
《態様１０》
　態様７～９のいずれか一項に記載の包装用積層体を用いて形成された、チューブ用包装体。
《態様１１》
　第１のポリオレフィン層に、有機系紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物を押し出しして紫外線吸収層を形成して、第１の積層体を形成すること、及び
　前記第１の積層体と、第２のポリオレフィン層とで、紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物をサンドイッチラミネートすることを含む、包装用積層体の製造方法。 The present inventors have found that the above problems can be solved by the present invention having the following aspects.
<< Aspect 1 >>
A laminated body for a packaging body including a first polyolefin layer, an ultraviolet absorbing layer containing an organic ultraviolet absorber and a polyolefin, and a second polyolefin layer in this order,
The thicknesses of the first polyolefin layer, the ultraviolet absorption layer, and the second polyolefin layer are each greater than 25 μm, and the content of the organic ultraviolet absorber is 0 with respect to the ultraviolet absorption layer. A packaging laminate having a content of 0.01 to 2.0% by weight.
<< Aspect 2 >>
The laminated body for packaging according to aspect 1, wherein the first polyolefin layer and the second polyolefin layer each have a thickness of 30 μm or more.
<< Aspect 3 >>
The thickness of the ultraviolet absorbing layer is 60 μm or more, and the content of the organic ultraviolet absorber is 0.25 to 1.0% by weight with respect to the ultraviolet absorbing layer. Laminate for packaging.
<< Aspect 4 >>
The packaging laminate according to any one of aspects 1 to 3, wherein the total thickness of the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer is 200 μm or more and 500 μm or less.
<< Aspect 5 >>
The packaging laminate according to any one of aspects 1 to 4, wherein an adhesive for dry lamination does not exist between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. .
<< Aspect 6 >>
The laminate strength of the first polyolefin layer and the ultraviolet absorbing layer, and the laminate strength of the ultraviolet absorbing layer and the second polyolefin layer are 5.0 N / 15 mm or more, respectively. The laminate for packaging according to claim 1.
<< Aspect 7 >>
The packaging laminate according to any one of aspects 1 to 6, further comprising a base material layer and a heat seal layer in this order, which are laminated on the second polyolefin layer.
<< Aspect 8 >>
A packaging laminate, wherein the base material layer is sandwiched between the second polyolefin layers of the two packaging laminates according to any one of aspects 1 to 6.
<< Aspect 9 >>
The laminate for packaging according to aspect 7 or 8, wherein the light transmittance at a wavelength of 380 nm is 10% or less and the light transmittance at a wavelength of 450 nm is 75% or more.
<< Aspect 10 >>
A tube packaging body formed using the packaging laminate according to any one of Embodiments 7 to 9.
<< Aspect 11 >>
Extruding a molten resin composition containing an organic ultraviolet absorber and polyolefin to the first polyolefin layer to form an ultraviolet absorbing layer to form a first laminate, and the first laminate and A method for producing a laminate for packaging, comprising sandwich-laminating a molten resin composition containing an ultraviolet absorber and a polyolefin with a second polyolefin layer.
　本発明によれば、有機系紫外線吸収剤のブリードアウトを抑制でき、容易に製造することができる、紫外線吸収層を有する包装用積層体を提供することができる。 According to the present invention, it is possible to provide a packaging laminate having an ultraviolet absorbing layer that can suppress bleed-out of an organic ultraviolet absorber and can be easily manufactured.
図１は、本発明の包装用積層体を例示している。FIG. 1 illustrates the packaging laminate of the present invention.
《包装用積層体》
　本発明の包装用積層体は、第１のポリオレフィン層、有機系紫外線吸収剤及びポリオレフィンを含む紫外線吸収層、及び第２のポリオレフィン層をこの順に含む。ここで、第１のポリオレフィン層、紫外線吸収層、及び第２のポリオレフィン層の厚さは、それぞれ２５μｍ超であり、かつ有機系紫外線吸収剤の含有量は、紫外線吸収層に対して０．０１～２．０重量％である。 《Packaging for packaging》
The packaging laminate of the present invention includes a first polyolefin layer, an ultraviolet absorbing layer containing an organic ultraviolet absorber and polyolefin, and a second polyolefin layer in this order. Here, the thickness of each of the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer is more than 25 μm, and the content of the organic ultraviolet absorber is 0.01 with respect to the ultraviolet absorbing layer. ~ 2.0% by weight.
　本発明においては、紫外線吸収層に含まれる紫外線吸収剤の濃度を低くすることによってブリードアウトを抑制しつつ、紫外線吸収層を比較的厚くすることによって、紫外線吸収性能を低下させないようにし、かつ第１のポリオレフィン層及び第２のポリオレフィン層も比較的厚くすることによって、ポリオレフィン層を紫外線吸収剤の移行阻止層として機能させることができる。さらに、本発明の積層体は、紫外線吸収剤の濃度を低くし、かつ各層をポリオレフィンから構成することによって、これらの層間の接着強度を高めることができる。 In the present invention, the ultraviolet absorbing layer is made relatively thick while the bleed-out is suppressed by reducing the concentration of the ultraviolet absorber contained in the ultraviolet absorbing layer, and the ultraviolet absorbing performance is not lowered. By making the first polyolefin layer and the second polyolefin layer relatively thick, the polyolefin layer can function as an ultraviolet absorber migration-preventing layer. Furthermore, the laminated body of this invention can raise the adhesive strength between these layers by making the density | concentration of a ultraviolet absorber low, and comprising each layer from polyolefin.
　本発明の積層体は、好ましくは透明であり、それによりこの積層体を用いて作製した包装体では、内部を目視で確認することができる。特に、本発明の積層体は、波長４５０ｎｍでの光線透過率が、分光光度計Ｕ－４０００（株式会社日立ハイテクノロジーズ）で測定した場合に、７５％以上、８０％以上、又は８５％以上である。 The laminate of the present invention is preferably transparent, whereby the inside of the package produced using this laminate can be visually confirmed. In particular, the laminate of the present invention has a light transmittance at a wavelength of 450 nm of 75% or more, 80% or more, or 85% or more when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation). is there.
　本発明の積層体は、紫外線を透過させない。特に、本発明の積層体は、波長３８０ｎｍでの光線透過率が、分光光度計Ｕ－４０００（株式会社日立ハイテクノロジーズ）で測定した場合に、２０％以下、１０％以下、又は７％以下である。また特に、本発明の積層体は、波長３５０ｎｍでの光線透過率が、分光光度計Ｕ－４０００（株式会社日立ハイテクノロジーズ）で測定した場合に、５．０％以下、３．０％以下、又は１．０％以下である。 The laminate of the present invention does not transmit ultraviolet rays. In particular, the laminate of the present invention has a light transmittance at a wavelength of 380 nm of 20% or less, 10% or less, or 7% or less when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation). is there. In particular, the laminate of the present invention has a light transmittance at a wavelength of 350 nm of 5.0% or less, 3.0% or less when measured with a spectrophotometer U-4000 (Hitachi High-Technologies Corporation) Or 1.0% or less.
　本発明の積層体は、第１のポリオレフィン層、紫外線吸収層、及び第２のポリオレフィン層の間に他の層を含まず、３層から構成されていてもよい。この場合、さらに好ましくは、紫外線吸収層がサンドイッチラミネートによって、第１のポリオレフィン層及び第２のポリオレフィン層の間に形成されていることが好ましい。この場合には、これらの層間に高いラミネート強度を与えることができる。この場合、本発明の積層体は、第１のポリオレフィン層、紫外線吸収層、及び第２のポリオレフィン層の間に、ドライラミネート用の接着剤が存在していないことが好ましい。具体的には、第１のポリオレフィン層、紫外線吸収層、及び第２のポリオレフィン層の間には、ポリウレタン系接着剤、アクリル樹脂系接着剤、エポキシ樹脂系接着剤、及びシリコーン樹脂系接着剤が存在していないことが好ましい。 The laminate of the present invention may be composed of three layers without including other layers between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. In this case, it is more preferable that the ultraviolet absorbing layer is formed between the first polyolefin layer and the second polyolefin layer by sandwich lamination. In this case, a high laminate strength can be given between these layers. In this case, in the laminate of the present invention, it is preferable that an adhesive for dry lamination does not exist between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. Specifically, a polyurethane-based adhesive, an acrylic resin-based adhesive, an epoxy resin-based adhesive, and a silicone resin-based adhesive are interposed between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. Preferably it is not present.
　例えば、第１のポリオレフィン層と紫外線吸収層とのラミネート強度、及び紫外線吸収層と第２のポリオレフィン層とのラミネート強度は、Ｔ字剥離試験法でストログラフＶＥ１０Ｄ（株式会社東洋精機製作所）を用いて、つかみ治具間距離５０ｍｍで引っ張り速度３００ｍｍ／分で測定した場合に、それぞれ５．０Ｎ／１５ｍｍ以上、７．０Ｎ／１５ｍｍ以上、又は１０．０Ｎ／１５ｍｍ以上であることが好ましい。 For example, the laminate strength between the first polyolefin layer and the ultraviolet absorbing layer, and the laminate strength between the ultraviolet absorbing layer and the second polyolefin layer are measured by using a graph VE10D (Toyo Seiki Seisakusho Co., Ltd.) by the T-shaped peel test method. When measured at a distance between gripping jigs of 50 mm and a pulling speed of 300 mm / min, it is preferably 5.0 N / 15 mm or more, 7.0 N / 15 mm or more, or 10.0 N / 15 mm or more, respectively.
　第１のポリオレフィン層、紫外線吸収層、及び第２のポリオレフィン層の３層の厚さの合計は、１００μｍ以上、１２０μｍ以上、１５０μｍ以上、又は２００μｍ以上であってもよく、５００μｍ以下、３５０μｍ以下、３００μｍ以下、又は２５０μｍ以下であってもよい。 The total thickness of the three layers of the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer may be 100 μm or more, 120 μm or more, 150 μm or more, or 200 μm or more, 500 μm or less, 350 μm or less, It may be 300 μm or less, or 250 μm or less.
　本発明の積層体は、包装体として適度なコシを与えるために、さらに第２のポリオレフィン層側に基材層を有していてもよい。また、本発明の積層体は、基材層の第２のポリオレフィン層とは反対面に、ヒートシール層を有していてもよい。これにより、積層体を筒状にしてヒートシールすることによって、容易に包装体を形成することができる。 The laminate of the present invention may further have a base material layer on the second polyolefin layer side in order to give an appropriate stiffness as a package. Moreover, the laminated body of this invention may have a heat seal layer in the opposite surface to the 2nd polyolefin layer of a base material layer. Thereby, a package can be easily formed by heat-sealing a laminated body into a cylinder shape.
　さらに、２枚の本発明の積層体によって、基材層をサンドイッチしてもよい。この積層体も、高い紫外線吸収性を有していながら、ブリードアウトを発生させず、包装体に腰を与え、かつ筒状にしてヒートシールすることによって容易に包装体を形成することができる点で、有利である。 Further, the base material layer may be sandwiched between two laminates of the present invention. Although this laminate also has high ultraviolet absorptivity, it does not generate bleed-out, can be easily formed by giving a waist to the package and heat-sealing it in a cylindrical shape. It is advantageous.
　本発明の積層体は、本発明の効果を実質的に損なわない範囲で、他の層を有していてもよく、例えば接着層、印刷層、アンカーコート層、プライマー層等を有していてもよい。 The laminate of the present invention may have other layers as long as the effects of the present invention are not substantially impaired, for example, an adhesive layer, a printed layer, an anchor coat layer, a primer layer, etc. Also good.
　例えば、本発明の積層体は、全ての層の厚さの合計が、１００μｍ以上、１５０μｍ以上、２００μｍ以上、２５０μｍ以上、又は３００μｍ以上であってもよく、８００μｍ以下、６００μｍ以下、又は５００μｍ以下であってもよい。 For example, the laminate of the present invention may have a total thickness of all layers of 100 μm or more, 150 μm or more, 200 μm or more, 250 μm or more, or 300 μm or more, and is 800 μm or less, 600 μm or less, or 500 μm or less. There may be.
　図１（ａ）は、本発明の１つの実施形態の積層体を例示している。この積層体（１０）は、第１のポリオレフィン層（１）、紫外線吸収層（３）、及び第２のポリオレフィン層（２）から構成されている。図１（ｂ）は、基材層（４）及びヒートシール層（５）を含む、本発明の１つの実施形態の積層体（１０）を例示している。図１（ｃ）は、図１（ａ）の２枚の積層体によって、基材層（４）をサンドイッチしている、本発明の１つの実施形態の積層体（１０）を例示している。これは、図１（ｂ）のヒートシール層（５）として、図１（ａ）の積層体を用いているとも考えられる。 FIG. 1A illustrates a laminate according to one embodiment of the present invention. This laminated body (10) is comprised from the 1st polyolefin layer (1), the ultraviolet absorption layer (3), and the 2nd polyolefin layer (2). FIG. 1 (b) illustrates a laminate (10) of one embodiment of the present invention comprising a substrate layer (4) and a heat seal layer (5). FIG. 1 (c) illustrates a laminate (10) of one embodiment of the present invention in which the substrate layer (4) is sandwiched by the two laminates of FIG. 1 (a). . This is also considered that the laminated body of Fig.1 (a) is used as the heat seal layer (5) of FIG.1 (b).
〈紫外線吸収層〉
　本発明の積層体で用いられる紫外線吸収層は、有機系紫外線吸収剤及びポリオレフィンを含む。この層は、２５μｍ超の厚みを有し、かつ有機系紫外線吸収剤の含有量はこの層中で０．０１～２．０重量％である。紫外線吸収剤の濃度を低くしてブリードアウトを抑制しつつ、かつ厚みを確保することで紫外線吸収性能を維持することができる。 <Ultraviolet absorbing layer>
The ultraviolet absorbing layer used in the laminate of the present invention contains an organic ultraviolet absorber and polyolefin. This layer has a thickness of more than 25 μm, and the content of the organic ultraviolet absorber is 0.01 to 2.0% by weight in this layer. The ultraviolet absorbing performance can be maintained by reducing the concentration of the ultraviolet absorber to suppress bleed-out and securing the thickness.
　この層の厚みは、例えば３０μｍ以上、４０μｍ以上、５０μｍ以上、６０μｍ以上、７０μｍ以上、１００μｍ以上、又は１３０μｍ以上であってもよく、３００μｍ以下、２５０μｍ以下、又は２００μｍ以下であってもよい。積層体中に２つ以上の紫外線吸収層が存在する場合には、ここに記載の厚みは、それらの合計の厚みを意味する。 The thickness of this layer may be, for example, 30 μm or more, 40 μm or more, 50 μm or more, 60 μm or more, 70 μm or more, 100 μm or more, or 130 μm or more, or 300 μm or less, 250 μm or less, or 200 μm or less. When two or more ultraviolet absorbing layers are present in the laminate, the thickness described here means the total thickness thereof.
　有機系紫外線吸収剤の含有量は、例えば０．０１重量％以上、０．０５重量％以上、０．１重量％以上、０．２５重量％以上、又は０．５重量％以上であってもよく、また２．０重量％以下、１．８重量％以下、１．５重量％以下、１．２重量％以下、又は１．０重量％以下であってもよい。含有量が少なすぎる場合には紫外線吸収効果が発揮できず、含有量が多すぎる場合には層間の接着強度が低下し、かつブリードアウトが発生する場合がある。そのような観点から、特に有機系紫外線吸収剤の含有量は、０．１０重量％以上１．５重量％以下、特に好ましくは０．２５重量％以上１．０重量％以下である。 The content of the organic ultraviolet absorber may be, for example, 0.01% by weight or more, 0.05% by weight or more, 0.1% by weight or more, 0.25% by weight or more, or 0.5% by weight or more. It may be 2.0% by weight or less, 1.8% by weight or less, 1.5% by weight or less, 1.2% by weight or less, or 1.0% by weight or less. When the content is too small, the ultraviolet absorption effect cannot be exhibited, and when the content is too large, the adhesive strength between the layers may be lowered and bleeding may occur. From such a viewpoint, the content of the organic ultraviolet absorber is particularly 0.10% by weight to 1.5% by weight, and particularly preferably 0.25% by weight to 1.0% by weight.
　有機系紫外線吸収剤としては、紫外線を吸収する有機化合物であれば特に限定されないが、ベンゾトリアゾール系化合物、ベンゾフェノン系化合物、トリアジン系化合物、シアノアクリレート系化合物、オキザニリド系化合物、サリシレート系化合物、ホルムアミジン系化合物等を挙げることができ、特にベンゾトリアゾール系化合物を用いることができる。 The organic ultraviolet absorber is not particularly limited as long as it is an organic compound that absorbs ultraviolet rays, but benzotriazole compounds, benzophenone compounds, triazine compounds, cyanoacrylate compounds, oxanilide compounds, salicylate compounds, formamidines. And benzotriazole compounds can be used.
　ポリオレフィンとしては、サンドイッチラミネートによって紫外線吸収層を形成するのに好適なポリオレフィンを挙げることができ、特にポリエチレン及びポリプロピレンが挙げられる。ポリエチレンとしては、低密度ポリエチレン（ＬＤＰＥ）、直鎖状低密度ポリエチレン（ＬＬＤＰＥ）、中密度ポリエチレン（ＭＤＰＥ）、高密度ポリエチレン（ＨＤＰＥ）、エチレン－アクリル酸共重合体（ＥＡＡ）、エチレン－メタクリル酸共重合体（ＥＭＡＡ）、エチレン－エチルアクリレート共重合体（ＥＥＡ）、エチレン－メチルアクリレート共重合体（ＥＭＡ）、エチレンビニルアセテート共重合体（ＥＶＡ）、カルボン酸変性ポリエチレン、カルボン酸変性エチレンビニルアセテート共重合体、アイオノマー、及びこれらの誘導体、並びにこれらの混合物が挙げられる。また、ポリプロピレンとしては、ポリプロピレン（ＰＰ）ホモポリマー、ランダムポリプロピレン（ランダムＰＰ）、ブロックポリプロピレン（ブロックＰＰ）、塩素化ポリプロピレン、カルボン酸変性ポリプロピレン、及びこれらの誘導体、並びにこれらの混合物が挙げられる。 Examples of polyolefins include polyolefins suitable for forming an ultraviolet absorbing layer by sandwich lamination, and particularly polyethylene and polypropylene. Polyethylene includes low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid. Copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), ethylene vinyl acetate copolymer (EVA), carboxylic acid modified polyethylene, carboxylic acid modified ethylene vinyl acetate Examples include copolymers, ionomers, and derivatives thereof, and mixtures thereof. Examples of polypropylene include polypropylene (PP) homopolymer, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, carboxylic acid-modified polypropylene, and derivatives thereof, and mixtures thereof.
　紫外線吸収層には、本発明の効果を実質的に損なわない範囲で、他の添加剤を有していてもよく、無機系の紫外線吸収剤を有していてもよい。 The ultraviolet absorbing layer may contain other additives or may contain an inorganic ultraviolet absorber as long as the effects of the present invention are not substantially impaired.
〈第１のポリオレフィン層及び第２のポリオレフィン層〉　
　第１のポリオレフィン層及び第２のポリオレフィン層は、共に２５μｍ超の厚さを有することで、紫外線吸収剤のブリードアウトを抑制する。第１のポリオレフィン層及び第２のポリオレフィン層は、共にヒートシール性であることが好ましい。ヒートシール層として製膜フィルムを用いる場合、厚みが２５μｍ超であると製膜が安定しやすくなり、好ましい。本発明で用いる第１のポリオレフィン層及び第２のポリオレフィン層の厚みは、２５μｍを超える厚さが好ましい。 <First polyolefin layer and second polyolefin layer>
The first polyolefin layer and the second polyolefin layer both have a thickness of more than 25 μm, thereby suppressing bleeding out of the ultraviolet absorber. Both the first polyolefin layer and the second polyolefin layer are preferably heat-sealable. When using a film-forming film as the heat seal layer, it is preferable that the thickness is more than 25 μm because the film formation is easily stabilized. The thickness of the first polyolefin layer and the second polyolefin layer used in the present invention is preferably more than 25 μm.
　第１のポリオレフィン層及び第２のポリオレフィン層の厚みは、それぞれ２５μｍ超、３０μｍ以上、３５μｍ以上、４０μｍ以上、又は５０μｍ以上であってもよく、１５０μｍ以下又は１００μｍ以下であってもよい。積層体中に２つ以上の第１のポリオレフィン層及び第２のポリオレフィン層が存在する場合には、ここに記載の厚みは、それぞれの厚みを意味する。第１のポリオレフィン層及び第２のポリオレフィン層の少なくとも一方が、３０μｍ超、４０μｍ超又は７０μｍ超であってもよい。 The thicknesses of the first polyolefin layer and the second polyolefin layer may be more than 25 μm, 30 μm or more, 35 μm or more, 40 μm or more, or 50 μm or more, respectively, or 150 μm or less or 100 μm or less. When two or more first polyolefin layers and second polyolefin layers are present in the laminate, the thicknesses described here mean the respective thicknesses. At least one of the first polyolefin layer and the second polyolefin layer may be greater than 30 μm, greater than 40 μm, or greater than 70 μm.
　これらの層に用いられるポリオレフィンとしては、上記の紫外線吸収層で用いることができるポリオレフィンと同様の種類を挙げることができる。好ましくは、第１のポリオレフィン層及び第２のポリオレフィン層で用いられるポリオレフィンは、紫外線吸収層に用いられるポリオレフィンと、同種のポリオレフィンである。また、好ましくは、第１のポリオレフィン層及び第２のポリオレフィン層で用いられるポリオレフィンは、酸素原子含有ポリオレフィンではない。好ましくは、第１のポリオレフィン層及び第２のポリオレフィン層で用いられるポリオレフィンは、ポリマーの主鎖にエチレン基の繰返し単位を、５０ｍｏｌ％以上、６０ｍｏｌ％以上、７０ｍｏｌ％以上、８０ｍｏｌ％以上、又は９０ｍｏｌ％以上含む樹脂であり、ポリマーの主鎖にプロピレン基の繰返し単位を、３０ｍｏｌ％以上、４０ｍｏｌ％以上、５０ｍｏｌ％以上、６０ｍｏｌ％以上、７０ｍｏｌ％以上、又は８０ｍｏｌ％以上含む樹脂である。 Examples of the polyolefin used in these layers include the same types as the polyolefin that can be used in the ultraviolet absorbing layer. Preferably, the polyolefin used in the first polyolefin layer and the second polyolefin layer is the same type of polyolefin as the polyolefin used in the ultraviolet absorbing layer. Preferably, the polyolefin used in the first polyolefin layer and the second polyolefin layer is not an oxygen atom-containing polyolefin. Preferably, the polyolefin used in the first polyolefin layer and the second polyolefin layer has an ethylene group repeating unit of 50 mol% or more, 60 mol% or more, 70 mol% or more, 80 mol% or more, or 90 mol in the main chain of the polymer. %, Which is a resin containing 30 mol% or more, 40 mol% or more, 50 mol% or more, 60 mol% or more, 70 mol% or more, or 80 mol% or more of a repeating unit of propylene group in the main chain of the polymer.
　本発明の積層体においては、第１のポリオレフィン層に印刷を行ってもよい。その印刷は、ＵＶインキによって行うことが好ましく、印刷部分の表面を、セロテープ（登録商標）で剥がそうとした場合に、印刷部分が剥がれないことが好ましい。印刷は、例えばフレキソ印刷、樹脂凸版印刷等によって行うことができる。 In the laminate of the present invention, printing may be performed on the first polyolefin layer. The printing is preferably performed with UV ink. When the surface of the printed part is peeled off with cello tape (registered trademark), the printed part is preferably not peeled off. Printing can be performed by, for example, flexographic printing, resin letterpress printing, or the like.
〈基材層〉
　基材層は、本発明の積層体にコシを与え、また各層を積層する際に基材となることができる。基材層としては、上記の目的を達成できるならば特にその種類は限定されないが、例えば、ポリ塩化ビニルフィルム、ポリ塩化ビニリデンフィルム、ポリクロロトリフルオロエチレンフィルム、ポリテトラフルオロエチレンフィルム、飽和又は不飽和ポリエステルフィルム、ポリアミドフィルム、ポリアクリロニトリルフィルム、及びこれらの２以上の積層体を挙げることができ、特にポリエチレンテレフタレート（ＰＥＴ）フィルムを挙げることができる。これらのフィルムは、無機酸化物の蒸着層、例えばシリカ蒸着層を有していてもよい。 <Base material layer>
The base material layer gives a firmness to the laminate of the present invention, and can serve as a base material when laminating each layer. The type of the base layer is not particularly limited as long as the above-described purpose can be achieved. For example, a polyvinyl chloride film, a polyvinylidene chloride film, a polychlorotrifluoroethylene film, a polytetrafluoroethylene film, a saturated or non-volatile layer is usable. A saturated polyester film, a polyamide film, a polyacrylonitrile film, and a laminate of two or more thereof can be exemplified, and a polyethylene terephthalate (PET) film can be particularly mentioned. These films may have an inorganic oxide vapor deposition layer, for example, a silica vapor deposition layer.
　基材層は、上記の目的を達成できるならば特にその厚みは限定されないが、例えば５μｍ以上、８μｍ以上、又は１０μｍ以上であってよく、また１００μｍ以下、５０μｍ以下、３０μｍ以下、又は２０μｍ以下であってよい。 The thickness of the base material layer is not particularly limited as long as the above-described object can be achieved, but may be, for example, 5 μm or more, 8 μm or more, or 10 μm or more, and 100 μm or less, 50 μm or less, 30 μm or less, or 20 μm or less It may be.
〈ヒートシール層〉
　ヒートシール層は、互いに重ねて押圧し、８０～２５０℃の範囲の温度にすることによって接着させることができれば特に限定されない。特に、１４０℃かつ０．２ＭＰａの条件で１．０秒間ヒートシールをして、包装体として有用な強度で接着できる層であれば、特に限定されない。 <Heat seal layer>
The heat seal layers are not particularly limited as long as they can be bonded by being pressed against each other and brought to a temperature in the range of 80 to 250 ° C. In particular, it is not particularly limited as long as it is a layer that can be heat-sealed for 1.0 second under conditions of 140 ° C. and 0.2 MPa and can be bonded with strength useful as a package.
　このようなヒートシール層としては、ポリオレフィン層を挙げることができ、上記の紫外線吸収層で用いることができるポリオレフィンと同様の種類を挙げることができる。 Examples of such a heat seal layer include a polyolefin layer, and the same types as those of the polyolefin that can be used in the ultraviolet absorbing layer.
　また、ヒートシール層の厚みは、１５μｍ以上、３０μｍ以上、又は５０μｍ以上であってもよく、２００μｍ以下又は１４０μｍ以下であってもよい。 The thickness of the heat seal layer may be 15 μm or more, 30 μm or more, or 50 μm or more, or 200 μm or less or 140 μm or less.
　ヒートシール層は、その表面に印刷を行うことができることが好ましい。その印刷は、ＵＶインキによって行うことが好ましく、印刷部分の表面を、セロテープ（登録商標）で剥がそうとした場合に、印刷部分が剥がれないことが好ましい。印刷は、例えばフレキソ印刷、樹脂凸版印刷等によって行うことができる。 The heat seal layer is preferably capable of printing on its surface. The printing is preferably performed with UV ink. When the surface of the printed part is peeled off with cello tape (registered trademark), the printed part is preferably not peeled off. Printing can be performed by, for example, flexographic printing, resin letterpress printing, or the like.
《包装用積層体の製造方法》
　第１のポリオレフィン層、有機系紫外線吸収剤及びポリオレフィンを含む紫外線吸収層、及び第２のポリオレフィン層を含む上記の包装用積層体の製造方法は、特に限定されない。例えば、本発明の包装用積層体は、上記の各層の材料を各種の成形方法、例えばキャスト法、インフレーション法、カレンダー成形法、Ｔダイ法、共押出成形等することにより製造することができる。 << Manufacturing method of packaging laminate >>
The manufacturing method of said laminated body for packaging containing the 1st polyolefin layer, the ultraviolet absorber layer containing an organic type ultraviolet absorber and polyolefin, and the 2nd polyolefin layer is not specifically limited. For example, the packaging laminate of the present invention can be produced by subjecting the material of each of the above layers to various molding methods such as a casting method, an inflation method, a calendar molding method, a T-die method, and co-extrusion molding.
　また、紫外線吸収層をインフレーション法、Ｔダイ法、カレンダー成形法によりフィルムに形成し、第１のポリオレフィン層及び第２のポリオレフィン層を、これらの方法でフィルム化した後に、紫外線吸収層とラミネートすることによって、本発明の積層体を製造することもできる。この際には、使用する材料に応じて、１５０℃以上、１８０℃以上、又は２００℃以上で、かつ３５０℃以下、３３０℃以下、又は３００℃以下の温度で各層を成膜することができる。 Further, an ultraviolet absorbing layer is formed on a film by an inflation method, a T-die method, or a calendar molding method, and the first polyolefin layer and the second polyolefin layer are formed into a film by these methods and then laminated with the ultraviolet absorbing layer. By this, the laminated body of this invention can also be manufactured. In this case, each layer can be formed at a temperature of 150 ° C. or higher, 180 ° C. or higher, or 200 ° C. or higher, and 350 ° C. or lower, 330 ° C. or lower, or 300 ° C. or lower depending on the material used. .
　紫外線吸収層で用いられる材料の混練は、例えば、ニーダー、バンバリーミキサー、ミキシングロールなどのバッチ式混練機、２軸混練機などの連続混練機などを用いることができる。この際には、使用する材料に応じて、１００℃以上、１２０℃以上、又は１４０℃以上で行うことができ、また２２０℃以下、２００℃以下、又は１８０℃以下の温度で混練することができる。 For the kneading of the material used in the ultraviolet absorbing layer, for example, a batch kneader such as a kneader, a Banbury mixer, a mixing roll, or a continuous kneader such as a biaxial kneader can be used. In this case, depending on the material used, it can be performed at 100 ° C. or higher, 120 ° C. or higher, or 140 ° C. or higher, and can be kneaded at a temperature of 220 ° C. or lower, 200 ° C. or lower, or 180 ° C. or lower. it can.
　特に好ましくは、本発明の積層体は、基材層に積層させた第２のポリオレフィン層と、第１のポリオレフィン層との間に、紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物を押し出しして、サンドイッチラミネートによって紫外線吸収層を形成することが好ましい。紫外線吸収層の厚みを確保する場合には、第１のポリオレフィン層上又は第２のポリオレフィン層上に、紫外線吸収層を押出しラミネートによって第１の積層体を形成し、さらに紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物を第１の積層体と第２のポリオレフィン層とでサンドイッチラミネートによって積層することで、厚みのある紫外線吸収層を形成することができる。この場合には、第１のポリオレフィン層と第２のポリオレフィン層とは入れ替え可能である。 Particularly preferably, the laminate of the present invention is obtained by extruding a molten resin composition containing an ultraviolet absorber and a polyolefin between the second polyolefin layer laminated on the base material layer and the first polyolefin layer. It is preferable to form the ultraviolet absorbing layer by sandwich lamination. In order to secure the thickness of the ultraviolet absorbing layer, an ultraviolet absorbing layer is extruded on the first polyolefin layer or the second polyolefin layer to form a first laminate by laminating, and an ultraviolet absorber and polyolefin are further added. By laminating the molten resin composition containing the first laminate and the second polyolefin layer by sandwich lamination, a thick ultraviolet absorbing layer can be formed. In this case, the first polyolefin layer and the second polyolefin layer can be interchanged.
《包装体》
　本発明の包装体は、上記の包装用積層体を用いて形成される。本発明の包装体は、包装体の少なくとも１つの面に上記の包装用積層体を有する。 <Packaging body>
The package of the present invention is formed using the packaging laminate described above. The package of the present invention has the above-described packaging laminate on at least one surface of the package.
　好ましくは、上下の面がヒートシール性である上記の包装用積層体を筒状にして、上下に重ねてヒートシールすることによって、筒状の成形体を形成する。そして、得られた筒状の成形体の両端をシールして、包装体を得ることができる。この場合には、キャップを付けることができるように、筒状の成形体の一方にショルダー部分を形成してもよく、ショルダー部分を構成する部品を筒状の成形体に取り付けてもよい。 Preferably, the above-described packaging laminate having upper and lower surfaces that are heat-sealable is formed into a cylindrical shape, and the cylindrical formed body is formed by heat-sealing the upper and lower layers. And the both ends of the obtained cylindrical molded object can be sealed, and a package can be obtained. In this case, a shoulder portion may be formed on one side of the cylindrical molded body so that a cap can be attached, and components constituting the shoulder portion may be attached to the cylindrical molded body.
　本発明の包装体としては、チューブ状包装体、特にラミネートチューブであることが好ましい。上記の積層体を用いた場合には、積層体のコシを基材層によって調節できるため、剛性のあるラミネートチューブを形成することができる。 The package of the present invention is preferably a tubular package, particularly a laminated tube. When the above laminate is used, the stiffness of the laminate can be adjusted by the base material layer, so that a rigid laminate tube can be formed.
　例えば、本発明のチューブ状包装体は、圧子φ２５ｍｍ、押込み２０ｍｍ、押込み速度３．３ｍｍ／分でループステフネステスターＤＡ（株式会社東洋精機製作所）を用いて測定した場合の応力が、１５００ｍＮ以上又は１８００ｍＮ以上であってもよく、４０００ｍＮ以下、３０００ｍＮ以下、又は２５００ｍＮ以下であってもよい。 For example, the tubular package of the present invention has an indenter of 25 mm, an indentation of 20 mm, an indentation speed of 3.3 mm / min, and a stress when measured using a loop step tester DA (Toyo Seiki Seisakusho Co., Ltd.) 1500 mN or more It may be 1800 mN or more, 4000 mN or less, 3000 mN or less, or 2500 mN or less.
　本発明の包装体は、固体、液体、ゲル等の内容物を収容することができる。例えば、本発明の包装体は、食品、化学薬品、化粧品、洗剤等の内容物を収容することができ、特に化粧品を収容することができる。 The package of the present invention can contain contents such as solid, liquid, gel and the like. For example, the package of the present invention can contain contents such as foods, chemicals, cosmetics, and detergents, and particularly can contain cosmetics.
《サンプル作製》
　積層体を構成する際に、以下のフィルム、材料等を用いた。
　　第１及び第２のポリオレフィン層並びにヒートシール層：ＬＬＤＰＥフィルム（Ｌ－１００Ｎ、株式会社アイセロ）
　　紫外線吸収層用ポリオレフィン：ＬＤＰＥ（サンテックＬ１８５０Ｋ、旭化成ケミカルズ株式会社）
　　紫外線吸収剤：ベンゾトリアゾール系化合物（ＴＩＮＵＶＩＮ３２６、ＢＡＳＦジャパン株式会社）
　　基材層：ＰＥＴフィルム（Ｅ５２００、東洋紡株式会社）
　　ドライラミネート用接着剤層：主剤（ＴＭ２７７、東洋モートン株式会社）／硬化剤（ＣＡＴ－ＲＴ８６、東洋モートン株式会社） <Sample preparation>
When constituting the laminate, the following films, materials, and the like were used.
First and second polyolefin layers and heat seal layer: LLDPE film (L-100N, Aicello Co., Ltd.)
Polyolefin for UV absorbing layer: LDPE (Suntech L1850K, Asahi Kasei Chemicals Corporation)
UV absorber: benzotriazole compound (TINUVIN326, BASF Japan Ltd.)
Base material layer: PET film (E5200, Toyobo Co., Ltd.)
Adhesive layer for dry lamination: Main agent (TM277, Toyo Morton Co., Ltd.) / Curing agent (CAT-RT86, Toyo Morton Co., Ltd.)
　７０μｍ以下の紫外線吸収層を形成する際には、第１及び第２のポリオレフィン層とサンドイッチラミネートによって形成した。７０μｍ超の紫外線吸収層を形成する際には、一度、第２のポリオレフィン層に紫外線吸収層を押し出しして紫外線吸収層を有する積層体を成形し、最後にその積層体と第１のポリオレフィン層とで、紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物をサンドイッチラミネートして、紫外線吸収層の厚みを確保した。 When forming an ultraviolet absorbing layer of 70 μm or less, it was formed by sandwich lamination with the first and second polyolefin layers. When forming an ultraviolet absorbing layer having a thickness of more than 70 μm, the laminated body having the ultraviolet absorbing layer is formed by extruding the ultraviolet absorbing layer once to the second polyolefin layer, and finally the laminated body and the first polyolefin layer are formed. Then, the molten resin composition containing the ultraviolet absorber and polyolefin was sandwich-laminated to ensure the thickness of the ultraviolet absorbing layer.
　ＰＥＴフィルムと他のフィルムとを接着する際には、上記のドライラミネート用接着剤の塗布量は、３．５ｇ／ｍ２で用いた。 When the PET film and another film were bonded, the amount of the dry laminate adhesive applied was 3.5 g / m 2 .
　このようにして表１に記載の実施例１～６及び比較例１～２の積層体を作製した。なお、実施例４では、ヒートシール層の代わりに、紫外線吸収層を第１及び第２のポリオレフィン層でサンドイッチラミネートした積層体を用いた。実施例４の積層体では、２つの紫外線吸収層が含まれるが、紫外線吸収剤濃度は２つの紫外線吸収層で同じとした。これらの表面にＵＶインキを用いたフレキソ印刷によって絵柄を印刷し、チューブ状の包装体を形成した。絵柄は、実施例１～３、実施例５～６、及び比較例１においては、ヒートシール層に印刷し；実施例４及び実施例７においては、第１のポリオレフィン層に印刷し；比較例２においては、紫外線吸収層に行った。また、基材層であるＰＥＴフィルムを用いずに、実施例７の積層体を作製した。 Thus, laminates of Examples 1 to 6 and Comparative Examples 1 and 2 described in Table 1 were produced. In Example 4, instead of the heat seal layer, a laminate in which an ultraviolet absorbing layer was sandwich-laminated with first and second polyolefin layers was used. The laminated body of Example 4 includes two ultraviolet absorbing layers, but the ultraviolet absorber concentration is the same for the two ultraviolet absorbing layers. On these surfaces, a pattern was printed by flexographic printing using UV ink to form a tube-shaped package. The pattern is printed on the heat seal layer in Examples 1 to 3, Examples 5 to 6 and Comparative Example 1; in Examples 4 and 7, it is printed on the first polyolefin layer; In 2, it went to the ultraviolet absorbing layer. Moreover, the laminated body of Example 7 was produced, without using PET film which is a base material layer.
《評価方法》
　実施例１～７及び比較例１～２の積層体について、波長３５０ｎｍ、３８０ｎｍ、及び４５０ｎｍでの光線透過率を、分光光度計Ｕ－４０００（株式会社日立ハイテクノロジーズ）を用いて測定した。波長３５０ｎｍについては、透過率が３％以下である場合を○、透過率が３％超５％以下である場合を△、透過率が５％超である場合を×とし；波長３８０ｎｍについては、透過率が１０％以下である場合を○、透過率が１０％超２０％以下である場合を△、透過率が２０％超である場合を×とし；波長４５０ｎｍについては、透過率が７５％以上である場合を○、透過率が７５％未満である場合を×とした。 "Evaluation methods"
For the laminates of Examples 1 to 7 and Comparative Examples 1 and 2, the light transmittance at wavelengths of 350 nm, 380 nm, and 450 nm was measured using a spectrophotometer U-4000 (Hitachi High-Technologies Corporation). For a wavelength of 350 nm, ◯ when the transmittance is 3% or less, Δ when the transmittance is more than 3% and 5% or less, and x when the transmittance is more than 5%; When the transmittance is 10% or less, ◯, when the transmittance is more than 10% and 20% or less, Δ, and when the transmittance is more than 20%, x; for a wavelength of 450 nm, the transmittance is 75% The case where it was above was marked as ◯, and the case where the transmittance was less than 75% was marked as x.
　実施例１～７及び比較例１の積層体について、第１ポリオレフィン層、紫外線吸収層及び第２のポリオレフィン層のラミネート強度を、Ｔ字剥離試験法でストログラフＶＥ１０Ｄ（株式会社東洋精機製作所）を用いて、つかみ治具間距離５０ｍｍで引っ張り速度３００ｍｍ／分で測定した。ラミネート強度が、５．０Ｎ／１５ｍｍ以上である場合、層間強度を○とし、５．０Ｎ／１５ｍｍ未満である場合、層間強度を×とした。 For the laminates of Examples 1 to 7 and Comparative Example 1, the laminate strength of the first polyolefin layer, the ultraviolet absorbing layer and the second polyolefin layer was measured using a T-peeling test method using a strograph VE10D (Toyo Seiki Seisakusho Co., Ltd.). Using, the distance between the gripping jigs was 50 mm, and the tensile speed was 300 mm / min. When the laminate strength was 5.0 N / 15 mm or more, the interlayer strength was evaluated as ◯, and when the laminate strength was less than 5.0 N / 15 mm, the interlayer strength was evaluated as x.
　印刷した絵柄に、セロテープ（登録商標）を指で押しつけて、絵柄が剥がれるかどうかによって、その積層体表面の印刷適性を試験した。絵柄が剥離しない場合、印刷適性を○、絵柄が剥離する場合、印刷適性を×とした。 A cellophane (registered trademark) was pressed against the printed pattern with a finger, and the printability of the laminate surface was tested depending on whether the pattern was peeled off. When the pattern did not peel off, the printability was evaluated as ◯, and when the pattern peeled off, the printability was rated as x.
　実施例１～７及び比較例１～２の積層体から構成したチューブ状包装体の剛性を、ループステフネステスターＤＡ（株式会社東洋精機製作所）を用いて測定した。測定した応力が、１５００ｍＮ以下を×とし１５００～２０００ｍＮ未満を△、２０００ｍＮ以上を○とした。 The rigidity of the tube-shaped package composed of the laminates of Examples 1 to 7 and Comparative Examples 1 to 2 was measured using a loop step tester DA (Toyo Seiki Seisakusho Co., Ltd.). The measured stress was rated as x for 1500 mN or less, Δ for less than 1500 to 2000 mN, and ◯ for 2000 mN or more.
《結果》
　結果を以下の表に示す。
Figure JPOXMLDOC01-appb-T000001
 "result"
The results are shown in the table below.
Figure JPOXMLDOC01-appb-T000001
　比較例１では、ポリオレフィン層が十分に厚いために、ブリードアウトはしていないが、紫外線吸収剤の濃度が高いことから、可視域での光透過性が悪化し、またポリオレフィン層と紫外線吸収層との層間強度が悪化している。比較例２では、紫外線吸収層がむき出しとなっているために、紫外線吸収剤がブリードアウトし、印刷適性が悪化している。 In Comparative Example 1, since the polyolefin layer is sufficiently thick, bleed-out is not performed, but since the concentration of the UV absorber is high, the light transmittance in the visible region is deteriorated, and the polyolefin layer and the UV absorber layer The interlaminar strength has deteriorated. In Comparative Example 2, since the ultraviolet absorbing layer is exposed, the ultraviolet absorbent bleeds out and printability is deteriorated.
　上記の結果から、紫外線吸収剤の濃度を低くし、かつ紫外線吸収層を十分に厚くすることで、透明でかつ十分な紫外線吸収性能を有し、層間強度が高く、ブリードアウトをしない積層体が得られることが分かった。また、実施例１と実施例７とを比較すると、実施例１において３５０ｎｍの光線透過率が下がっており、基材層を設けることで紫外線をよりカットできることが分かる。 From the above results, it is possible to obtain a laminate that is transparent and has sufficient UV absorbing performance, has high interlayer strength, and does not bleed out by reducing the concentration of the UV absorber and sufficiently thickening the UV absorbing layer. It turns out that it is obtained. Moreover, when Example 1 is compared with Example 7, it turns out that the light transmittance of 350 nm is falling in Example 1, and an ultraviolet-ray can be cut more by providing a base material layer.
　１　　第１のポリオレフィン層
　２　　第２のポリオレフィン層
　３　　紫外線吸収層
　４　　基材層
　５　　ヒートシール層
　１０　　積層体 DESCRIPTION OF SYMBOLS 1 1st polyolefin layer 2 2nd polyolefin layer 3 Ultraviolet absorption layer 4 Base material layer 5 Heat seal layer 10 Laminate

Claims (11)

  1. 　第１のポリオレフィン層、有機系紫外線吸収剤及びポリオレフィンを含む紫外線吸収層、及び第２のポリオレフィン層をこの順に含む、包装体用積層体であって、
    　前記第１のポリオレフィン層、前記紫外線吸収層、及び前記第２のポリオレフィン層の厚さが、それぞれ２５μｍ超であり、かつ
    　前記有機系紫外線吸収剤の含有量が、前記紫外線吸収層に対して０．０１～２．０重量％である、包装用積層体。     A laminated body for a packaging body including a first polyolefin layer, an ultraviolet absorbing layer containing an organic ultraviolet absorber and a polyolefin, and a second polyolefin layer in this order,
    The thicknesses of the first polyolefin layer, the ultraviolet absorption layer, and the second polyolefin layer are each greater than 25 μm, and the content of the organic ultraviolet absorber is 0 with respect to the ultraviolet absorption layer. A packaging laminate having a content of 0.01 to 2.0% by weight.
  2. 　前記第１のポリオレフィン層及び前記第２のポリオレフィン層の厚さがそれぞれ３０μｍ以上である、請求項１に記載の包装用積層体。 The packaging laminate according to claim 1, wherein each of the first polyolefin layer and the second polyolefin layer has a thickness of 30 µm or more.
  3. 　前記紫外線吸収層の厚さが６０μｍ以上であり、かつ前記有機系紫外線吸収剤の含有量が、前記紫外線吸収層に対して０．２５～１．０重量％である、請求項１又は２に記載の包装用積層体。 The thickness of the ultraviolet absorbing layer is 60 μm or more, and the content of the organic ultraviolet absorber is 0.25 to 1.0% by weight with respect to the ultraviolet absorbing layer. The laminate for packaging described.
  4. 　前記第１のポリオレフィン層、前記紫外線吸収層、及び前記第２のポリオレフィン層の厚さの合計が、２００μｍ以上５００μｍ以下である、請求項１～３のいずれか一項に記載の包装用積層体。 The packaging laminate according to any one of claims 1 to 3, wherein the total thickness of the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer is from 200 袖 m to 500 袖 m. .
  5. 　前記第１のポリオレフィン層、紫外線吸収層、及び前記第２のポリオレフィン層の間に、ドライラミネート用の接着剤が存在していない、請求項１～４のいずれか一項に記載の包装用積層体。 The packaging laminate according to any one of claims 1 to 4, wherein an adhesive for dry lamination is not present between the first polyolefin layer, the ultraviolet absorbing layer, and the second polyolefin layer. body.
  6. 　前記第１のポリオレフィン層と前記紫外線吸収層とのラミネート強度、及び前記紫外線吸収層と前記第２のポリオレフィン層とのラミネート強度が、それぞれ５．０Ｎ／１５ｍｍ以上である、請求項１～５のいずれか一項に記載の包装用積層体。 The laminate strength between the first polyolefin layer and the ultraviolet absorbing layer and the laminate strength between the ultraviolet absorbing layer and the second polyolefin layer are each 5.0 N / 15 mm or more. The laminated body for packaging as described in any one.
  7. 　前記第２のポリオレフィン層に積層して、さらに基材層及びヒートシール層をこの順に含む、請求項１～６のいずれか一項に記載の包装用積層体。 The packaging laminate according to any one of claims 1 to 6, further comprising a base material layer and a heat seal layer in this order, which are laminated on the second polyolefin layer.
  8. 　基材層が、請求項１～６のいずれか一項に記載の２枚の包装用積層体の前記第２のポリオレフィン層によってサンドイッチされている、包装用積層体。 A packaging laminate in which the base material layer is sandwiched between the second polyolefin layers of the two packaging laminates according to any one of claims 1 to 6.
  9. 　波長３８０ｎｍの光線透過率が１０％以下であり、かつ波長４５０ｎｍの光線透過率が７５％以上である、請求項１～８のいずれか一項に記載の包装用積層体。 The packaging laminate according to any one of claims 1 to 8, wherein the light transmittance at a wavelength of 380 nm is 10% or less and the light transmittance at a wavelength of 450 nm is 75% or more.
  10. 　請求項１～９のいずれか一項に記載の包装用積層体を用いて形成された、チューブ用包装体。 A tube packaging body formed using the packaging laminate according to any one of claims 1 to 9.
  11. 　第１のポリオレフィン層に、有機系紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物を押し出しして紫外線吸収層を形成して、第１の積層体を形成すること、及び
    　前記第１の積層体と、第２のポリオレフィン層とで、紫外線吸収剤及びポリオレフィンを含む溶融樹脂組成物をサンドイッチラミネートすることを含む、包装用積層体の製造方法。     Extruding a molten resin composition containing an organic ultraviolet absorber and polyolefin to the first polyolefin layer to form an ultraviolet absorbing layer to form a first laminate, and the first laminate and A method for producing a laminate for packaging, comprising sandwich-laminating a molten resin composition containing an ultraviolet absorber and a polyolefin with a second polyolefin layer.
PCT/JP2016/063063 2015-05-12 2016-04-26 Laminate for packaging having ultraviolet absorption layer WO2016181827A1 (en)

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