JP2004010067A - Packaging material, packaging container, and method of manufacturing the packaging material - Google Patents

Packaging material, packaging container, and method of manufacturing the packaging material Download PDF

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Publication number
JP2004010067A
JP2004010067A JP2002162677A JP2002162677A JP2004010067A JP 2004010067 A JP2004010067 A JP 2004010067A JP 2002162677 A JP2002162677 A JP 2002162677A JP 2002162677 A JP2002162677 A JP 2002162677A JP 2004010067 A JP2004010067 A JP 2004010067A
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JP
Japan
Prior art keywords
layer
innermost
density
packaging material
polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002162677A
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Japanese (ja)
Inventor
Kazuya Ono
小野 和也
Hiroaki Ogita
荻田 弘明
Frisk Peter
ペーター フリスク
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nihon Tetra Pak KK
Original Assignee
Nihon Tetra Pak KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nihon Tetra Pak KK filed Critical Nihon Tetra Pak KK
Priority to JP2002162677A priority Critical patent/JP2004010067A/en
Priority to AU2003241879A priority patent/AU2003241879A1/en
Priority to PCT/JP2003/006975 priority patent/WO2003101732A1/en
Publication of JP2004010067A publication Critical patent/JP2004010067A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins

Landscapes

  • Cartons (AREA)
  • Laminated Bodies (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging material and a packaging container which have flavor keeping properties preventing flavor components from escaping out of the container and are excellent in heat sealability using an inexpensive multi-purpose resin, and a method of manufacturing the packaging material. <P>SOLUTION: The packaging material is made of a laminate packaging material comprising at least a base material, the outermost thermoplastic material layer and the innermost thermoplastic material layer. At least one intermediate layer is provided between the base material and the innermost layer. The innermost layer and the intermediate layer are made of polyethylene resin, wherein the density of the polyethylene resin of the intermediate layer is higher than that of the polyethylene resin of the innermost layer. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、保香性に優れた包装材料、包装容器および包装材料の製造方法に関する。
【0002】
【従来の技術】
紙を基材としてその両面にポリエチレン樹脂を積層させた構成の包装材料は種々の飲料用のゲーブルトップ容器として使用されている。しかし、保存中に内容物の風味成分がポリエチレン樹脂に収着し、結果として風味が変化する場合がある。
【0003】
その一例として、オレンジの香味成分として代表的なd−リモネンがあげられる。d−リモネンはポリエチレンによく収着される。そして取り込まれたd−リモネンはポリエチレン層を拡散し、基材の紙層を通り抜け徐々に容器外部に放出されてしまう。したがってゲーブルトップ型紙容器に保存されている柑橘系ジュースのフレーバー変化は大きい。
【0004】
ヒートシール性を改良するためにメタロセン触媒で重合を行なった直鎖状ポリエチレンを容器の最内層に用いることが行われている。しかし用いられる直鎖状ポリエチレンの密度が低いために、低密度ポリエチレンを最内層に用いた場合よりも内容物からの風味成分の損失が大きいと判断される場合がある。
【0005】
これを回避するためにはポリエステル樹脂などのいわゆる保香性樹脂をラミネートすることが一般に行われている。容器としては高価なものとなってしまう。
【0006】
【発明が解決しようとする課題】
解決しようとする問題点は、保香性に優れた包装材料、包装容器および包装材料の製造方法において、ヒートシール性に優れ、安価で製造実績のあるポリエチレンを包装材料に使用しながら、保香性に優れた包装材料・容器を得ることができないできない点である。
本発明は、d−リモネンのような香味成分が容器から逃げ出さない保香性を有し、汎用の廉価な樹脂を用いながら、ヒートシール性に優れた包装材料、包装容器及び包装材料の製造方法を提供することを目的とする。
【0007】
【課題を解決するための手段】
この課題を解決するために本発明は、包装材料の層構成を設計するとき、基材と最内層との間に設けられた中間層を最内層より高い密度のポリエチレンとするように構成したものである。これにより、上記目的を実現した。
【0008】
【発明の実施の形態】
本発明の請求項1に記載の発明は、基材と最外熱可塑性材料層と最内熱可塑性材料層とから少なくともなる積層包装材料であって、少なくとも1の中間層が基材と最内層との間に設けられ、最内層と該中間層とがポリエチレン樹脂からなり、中間層のポリエチレン樹脂の密度が最内層のポリエチレン樹脂の密度より高いことを特徴とする包装材料である。
低密度ポリエチレンあるいは直鎖状低密度ポリエチレンなどのポリエチレンを有する包装材料において、基材とそのポリエチレン最内シール層との間に、最内シール層よりも密度の高いポリエチレン中間層層を設けることにより、d−リモネンのような香味成分の収着、拡散を遅らせる。その結果として保香性を改良できるという作用を有する。
【0009】
請求項2に記載の発明は、基材と、最外ポリエチレン層と、最内ポリエチレン層と、該基材と該最内層との間に設けられた少なくとも1の中間層と、から少なくともなる積層包装材料より形成された包装容器であって、該最内層及び該中間層のポリエチレンの密度が連続的若しくは不連続的に内側から外側に向けて高くなることを特徴とする包装容器である。
低密度ポリエチレンあるいは直鎖状低密度ポリエチレンを有する容器において、そのポリエチレンの最内シール層と中間層に、内側から外側に向けて密度の高くなる密度勾配を設けることにより、d−リモネンのような香味成分が収着、拡散することを遅延させる。その結果、保香性を改良できるという作用を有する。
【0010】
請求項3に記載の発明は、基材と最外熱可塑性材料層と最内熱可塑性材料層とから少なくともなる積層包装材料の製造方法であって、少なくとも1の中間層が基材と該最内層との間に押出しラミネーションにより設け、該最内層と該中間層とがポリエチレン樹脂からなり、該中間層のポリエチレン樹脂の密度が最内層のポリエチレン樹脂の密度より高く、該中間層のフィルムに金属蒸着膜が形成されていることを特徴とする包装材料の製造方法である。
基材と最外熱可塑性材料層と最内低密度ポリエチレン層とから少なくともなる積層包装材料の製造方法において、基材とそのポリエチレン最内シール層との間に、最内シール層よりも密度の高いポリエチレン中間層フィルムを設けることにより、d−リモネンのような香味成分が収着、拡散することを遅延させる。更に、そのフィルムにアルミ、スズ等の金属を蒸着したことにより、更に保香性を改良できるという作用を有する。
以下、本発明の実施の形態について、説明する。
【0011】
(実施の形態1)
板紙を基材とし、低密度ポリエチレン(LDPE)を最内層とし、基材と最内層との間に最内層ポリエチレンよりも高密度のポリエチレン(HDPE)を含む下記の構成からなる包装材料である。
LDPE/基材/HDPE/LDPE
【0012】
(実施の形態2)
板紙を基材とし、メタロセン触媒を用いて重合された直鎖状低密度ポリエチレン(LLDPE)を最内層とし、基材と最内層との間に最内層ポリエチレンよりも高密度のポリエチレン(HDPE)を含む下記の構成からなる包装材料である。
LDPE/基材/HDPE/LLDPE
上記の構成は共押し出しラミネートにより製造可能である。
【0013】
この発明の包装材料を製造する際に、押し出し加工によるゲーブルトップ用包装材料の製造で最内層として用いられる低密度ポリエチレンは、密度0.910〜0.926g/cm、融点105〜113℃であり、直鎖状低密度ポリエチレンの場合には密度0.910〜0.918g/cm、融点102〜105℃である。この発明によるこの形態において、最内層よりも密度の高いポリエチレンとは、その密度が0.936g/cm以上、融点127℃以上のものであり、最内層樹脂よりも密度で0.010g/cm以上大きく、また融点では15℃以上高いのものを示す。なお、ここで示すポリエチレン樹脂の融点とは、K6922−2に準拠したDSC分析において得られた温度である。
【0014】
(実施の形態3)
この発明において、次に示す構造も本発明の実施の形態の一つである。
LDPE/基材/LDPE/HDPE/LDPEあるいはLLDPE
上記の構成の材料は、HDPEの多層押し出しラミネーション、あるいはHDPEフィルムを用いた押し出しラミネーションにより製造される。
HDPEフィルムを用いた押し出しラミネーションを用いた包装材料の製造方法では、アルミニウム、スズ等の金属を蒸着したHDPEフィルムを用いることにより、更に保香性能を向上させることができる。得られる包装材料は、次の層構成を持つ。
LDPE/基材/LDPE/金属蒸着HDPE/LDPEあるいはLLDPE
なお、蒸着HDPEはラミネートの際、蒸着面をシーラント層に向けてラミネートすることが保香性の観点から好ましい。実用上は蒸着面を基材側に向けても何ら問題はない。
【0015】
なお、以上の説明では、構成例で説明したが、その他の材料についても同様に実施可能である。
【0016】
上述の包装材料は、製造後、例えば、一般的なゲーブルトップ容器の製造方法と同一の方法でゲーブルトップブランクスに加工される。本構成では蒸着HDPEフィルムを用いると金属断面(蒸着面)が露出するためブランクスにする際、必要に応じてスカイブ加工等の断面処理を行なう。
【0017】
この発明における包装容器は、例えば、ゲーブルトップ型容器の他、ブリック状(平行6面体)の他、6角柱状、8角柱状、四面体形状などがある。
【0018】
【実施例】
次に、本発明の具体例を説明する。
【0019】
(実施例1)
下記構成の包装材料を共押し出し加工により作製した。
LDPE(16g/m)/基材/HDPE(16g/m)/LDPE(20g/m
最内層と外層には密度0.924g/cm、融点113℃である低密度ポリエチレンを用いた。また基材と最内層との間には密度0.942g/cm、融点130℃である高密度ポリエチレンを使用した。
【0020】
(実施例2)
下記構成の包装材料を共押し出し加工により作製した。
LDPE(16g/m)/基材/HDPE(16g/m)/LLDPE(20g/m
外層には密度0.924g/cm、融点113℃である低密度ポリエチレンを用いた。また基材と最内層との間には密度0.942g/cm、融点130℃である高密度ポリエチレンを使用した。最内層にはメタロセン触媒により重合された密度0.913g/cm、融点103℃の直鎖状低密度ポリエチレンを使用した。
【0021】
(実施例3)
厚さ10μmのHDPEフィルムを押し出し加工でラミネートし下記構成の包装材料を作製した。
LDPE(16g/m)/基材/LDPE(10g/m)/HDPEフィルム(10μm)/LDPE(20g/m
最内層、フィルムラミネート層および外層には密度0.924g/cm、融点113℃である低密度ポリエチレンを用いた。また、この時使用したHDPEフィルムは密度0.956g/cm、融点131℃の高密度ポリエチレン樹脂をインフレーション加工して作製したものである。
【0022】
(実施例4)
アルミ蒸着した厚さ10μmのHDPEフィルムを押し出し加工でラミネートし下記構成の包装材料を作製した。
LDPE(16g/m)/基材/LDPE(10g/m)/蒸着HDPEフィルム(10μm)/LDPE(20g/m
最内層、フィルムラミネート層および外層には密度0.924g/cm、融点113℃である低密度ポリエチレンを用いた。また蒸着HDPEフィルムは密度0.956g/cm、融点131℃の高密度ポリエチレン樹脂をインフレーション加工して作製したHDPEフィルムに厚さ400オングストロームのアルミニウムの真空蒸着を行ったものである。
【0023】
(比較例1)
下記構成の包装材料を共押し出し加工により作製した。
LDPE(16g/m)/基材/LDPE(16g/m)/LDPE(20g/m
外層、内層、最内層ともすべて同じポリエチレンを使用した。使用した低密度ポリエチレンの密度は0.924g/cm、融点は113℃である。
【0024】
(比較例2)
下記構成の包装材料を共押し出し加工により作製した。
LDPE(16g/m)/基材/LDPE(16g/m)/LLDPE(20g/m
外層、内層には比較例1と同じ密度0.924g/cm、融点113℃の低密度ポリエチレンを使用した。そして最内層にはメタロセン触媒により合成された密度0.913g/cm、融点103℃である直鎖状低密度ポリエチレンを使用した。
【0025】
(保香性比較試験結果)
上記の実施例、比較例に示された積層体から1リットルのゲーブルトップ型容器ブランクスを製造し、充填機にて濃縮還元100%オレンジジュースを充填した。容器を10℃雰囲気に2日放置した後、官能試験により保香性の評価を行なった。
評価にあたっては同オレンジジュースをガラスビンに詰め密封したものを参照として、1対比較法によりそれぞれの保香性の評価をした。
結果を下記に示す。結果はガラスビン充填オレンジジュースのフレーバーを5とし、それぞれの紙容器のオレンジジュースのフレーバーの強度を1、2、3、4、5の5段階で相対的に評価したパネリストの採点の平均値で示した。
参照    5.0
実施例1  3.2
実施例2  3.0
実施例3  3.4
実施例4  3.7
比較例1  2.2
比較例2  1.5
実質的に風味成分の収着のないと考えられるガラスビンと比較した場合、紙容器でのフレーバーの低下は避けられないが、実施例の容器におけるフレーバーは比較例のものよりも明らかに強く、実施例の包材はいずれも保香性が改善されていると判断できる。
【0026】
【発明の効果】
以上説明したように本発明の包装材料、包装容器および包装材料の製造方法によって、
d−リモネンのような香味成分が容器から逃げ出さない保香性を有し、汎用の廉価な樹脂を用いながら、ヒートシール性に優れた包装材料、包装容器及び包装材料の製造方法を提供することができる。
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a packaging material, a packaging container, and a method for producing a packaging material having excellent fragrance retention.
[0002]
[Prior art]
BACKGROUND ART Packaging materials having a configuration in which paper is used as a base material and polyethylene resins are laminated on both sides thereof are used as gable top containers for various beverages. However, during storage, the flavor components of the contents may sorb to the polyethylene resin, resulting in a change in flavor.
[0003]
As an example, a typical d-limonene is cited as a flavor component of orange. d-Limonene is well sorbed on polyethylene. Then, the d-limonene taken in diffuses through the polyethylene layer, passes through the paper layer of the base material, and is gradually released to the outside of the container. Therefore, the flavor change of the citrus juice stored in the gable-top type paper container is large.
[0004]
In order to improve heat sealability, linear polyethylene polymerized with a metallocene catalyst is used for the innermost layer of a container. However, since the density of the linear polyethylene used is low, it may be determined that the loss of flavor components from the contents is greater than when low-density polyethylene is used for the innermost layer.
[0005]
In order to avoid this, it is common practice to laminate a so-called fragrance retaining resin such as a polyester resin. It becomes expensive as a container.
[0006]
[Problems to be solved by the invention]
The problem to be solved is that, in a manufacturing method of a packaging material, a packaging container and a packaging material having an excellent scent retention property, a polyethylene having excellent heat sealing properties, inexpensive and proven in production is used for the packaging material, It is not possible to obtain packaging materials and containers having excellent properties.
The present invention has a scent retention property such that a flavor component such as d-limonene does not escape from a container. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to solve this problem, the present invention is designed such that when designing the layer configuration of the packaging material, the intermediate layer provided between the base material and the innermost layer is made of polyethylene having a higher density than the innermost layer. It is. As a result, the above object has been achieved.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
An invention according to claim 1 of the present invention is a laminated packaging material comprising at least a base material, an outermost thermoplastic material layer, and an innermost thermoplastic material layer, wherein at least one intermediate layer has a base material and an innermost layer. Wherein the innermost layer and the intermediate layer are made of polyethylene resin, and the density of the polyethylene resin in the intermediate layer is higher than the density of the polyethylene resin in the innermost layer.
In a packaging material having polyethylene such as low-density polyethylene or linear low-density polyethylene, by providing a polyethylene intermediate layer having a higher density than the innermost seal layer between the base material and the polyethylene innermost seal layer. , Slows the sorption and diffusion of flavor components such as d-limonene. As a result, it has the effect of improving the scent retention.
[0009]
The invention according to claim 2 is a laminate comprising at least a base material, an outermost polyethylene layer, an innermost polyethylene layer, and at least one intermediate layer provided between the base material and the innermost layer. A packaging container formed from a packaging material, wherein the density of polyethylene in the innermost layer and the intermediate layer increases continuously or discontinuously from the inside to the outside.
In a container having a low-density polyethylene or a linear low-density polyethylene, the innermost sealing layer and the intermediate layer of the polyethylene are provided with a density gradient in which the density increases from the inside to the outside, so that a material such as d-limonene is formed. Delays sorption and diffusion of flavor components. As a result, there is an effect that the fragrance retention can be improved.
[0010]
The invention according to claim 3 is a method for producing a laminated packaging material comprising at least a base material, an outermost thermoplastic material layer, and an innermost thermoplastic material layer, wherein at least one intermediate layer comprises the base material and the outermost thermoplastic material layer. The innermost layer and the intermediate layer are made of polyethylene resin, and the density of the polyethylene resin of the intermediate layer is higher than the density of the polyethylene resin of the innermost layer. A method for producing a packaging material, wherein a vapor-deposited film is formed.
In a method for producing a laminated packaging material comprising at least a base material, an outermost thermoplastic material layer and an innermost low-density polyethylene layer, between the base material and the polyethylene innermost seal layer, a density lower than the innermost seal layer. Providing a high polyethylene interlayer film delays the sorption and diffusion of flavor components such as d-limonene. Further, by vapor-depositing a metal such as aluminum or tin on the film, there is an effect that the fragrance retention can be further improved.
Hereinafter, embodiments of the present invention will be described.
[0011]
(Embodiment 1)
This is a packaging material having the following constitution, which comprises a paperboard as a base material, a low-density polyethylene (LDPE) as an innermost layer, and a polyethylene (HDPE) having a higher density than the innermost layer polyethylene between the base material and the innermost layer.
LDPE / substrate / HDPE / LDPE
[0012]
(Embodiment 2)
A linear low-density polyethylene (LLDPE) polymerized using a metallocene catalyst is used as the innermost layer of a paperboard substrate, and polyethylene (HDPE) having a higher density than the innermost layer polyethylene is interposed between the substrate and the innermost layer. And a packaging material having the following configuration.
LDPE / substrate / HDPE / LLDPE
The above configuration can be manufactured by co-extrusion lamination.
[0013]
When producing the packaging material of the present invention, the low-density polyethylene used as the innermost layer in the production of the gable-top packaging material by extrusion processing has a density of 0.910 to 0.926 g / cm 3 and a melting point of 105 to 113 ° C. In the case of linear low-density polyethylene, the density is 0.910 to 0.918 g / cm 3 and the melting point is 102 to 105 ° C. In this embodiment according to the present invention, the polyethylene having a density higher than that of the innermost layer has a density of 0.936 g / cm 3 or more and a melting point of 127 ° C. or more, and has a density of 0.010 g / cm 3 or more than that of the innermost layer resin. A material having a melting point greater than 3 and a melting point higher than 15 ° C. is shown. In addition, the melting point of the polyethylene resin shown here is the temperature obtained by DSC analysis based on K6922-2.
[0014]
(Embodiment 3)
In the present invention, the following structure is also one of the embodiments of the present invention.
LDPE / substrate / LDPE / HDPE / LDPE or LLDPE
The material having the above configuration is manufactured by multi-layer extrusion lamination of HDPE or extrusion lamination using an HDPE film.
In the method for manufacturing a packaging material using extrusion lamination using an HDPE film, the use of an HDPE film on which a metal such as aluminum or tin is vapor-deposited can further improve the fragrance retention performance. The resulting packaging material has the following layer configuration:
LDPE / substrate / LDPE / metal-deposited HDPE / LDPE or LLDPE
In addition, when laminating | stacking the vapor deposition HDPE, it is preferable from a viewpoint of a fragrance retention that a vapor deposition surface is laminated | stacked toward a sealant layer. In practice, there is no problem even if the deposition surface is directed to the substrate side.
[0015]
In the above description, the configuration example is described, but other materials can be similarly implemented.
[0016]
After the above-mentioned packaging material is manufactured, it is processed into gable-top blanks by, for example, the same method as a general gable-top container manufacturing method. In this configuration, when a vapor-deposited HDPE film is used, a metal cross-section (vapor-deposited surface) is exposed, so that when blanks are formed, cross-section processing such as skiving is performed as necessary.
[0017]
Examples of the packaging container in the present invention include a gable-top container, a brick (parallel hexahedron), a hexagonal prism, an octagonal prism, a tetrahedron, and the like.
[0018]
【Example】
Next, a specific example of the present invention will be described.
[0019]
(Example 1)
A packaging material having the following configuration was produced by co-extrusion.
LDPE (16 g / m 2 ) / substrate / HDPE (16 g / m 2 ) / LDPE (20 g / m 2 )
For the innermost layer and the outermost layer, low-density polyethylene having a density of 0.924 g / cm 3 and a melting point of 113 ° C. was used. High density polyethylene having a density of 0.942 g / cm 3 and a melting point of 130 ° C. was used between the base material and the innermost layer.
[0020]
(Example 2)
A packaging material having the following configuration was produced by co-extrusion.
LDPE (16 g / m 2 ) / substrate / HDPE (16 g / m 2 ) / LLDPE (20 g / m 2 )
For the outer layer, low-density polyethylene having a density of 0.924 g / cm 3 and a melting point of 113 ° C. was used. High density polyethylene having a density of 0.942 g / cm 3 and a melting point of 130 ° C. was used between the base material and the innermost layer. For the innermost layer, a linear low-density polyethylene having a density of 0.913 g / cm 3 and a melting point of 103 ° C. polymerized by a metallocene catalyst was used.
[0021]
(Example 3)
An HDPE film having a thickness of 10 μm was laminated by extrusion to produce a packaging material having the following structure.
LDPE (16 g / m 2 ) / substrate / LDPE (10 g / m 2 ) / HDPE film (10 μm) / LDPE (20 g / m 2 )
Low-density polyethylene having a density of 0.924 g / cm 3 and a melting point of 113 ° C. was used for the innermost layer, the film laminate layer and the outer layer. The HDPE film used at this time was produced by inflation of a high-density polyethylene resin having a density of 0.956 g / cm 3 and a melting point of 131 ° C.
[0022]
(Example 4)
An aluminum-deposited HDPE film having a thickness of 10 μm was laminated by extrusion to prepare a packaging material having the following structure.
LDPE (16 g / m 2 ) / base material / LDPE (10 g / m 2 ) / evaporated HDPE film (10 μm) / LDPE (20 g / m 2 )
Low-density polyethylene having a density of 0.924 g / cm 3 and a melting point of 113 ° C. was used for the innermost layer, the film laminate layer and the outer layer. The vapor-deposited HDPE film is obtained by subjecting a high-density polyethylene resin having a density of 0.956 g / cm 3 and a melting point of 131 ° C. to inflation processing by vacuum vapor deposition of 400 Å thick aluminum on an HDPE film.
[0023]
(Comparative Example 1)
A packaging material having the following configuration was produced by co-extrusion.
LDPE (16 g / m 2 ) / substrate / LDPE (16 g / m 2 ) / LDPE (20 g / m 2 )
The same polyethylene was used for the outer layer, the inner layer, and the innermost layer. The low-density polyethylene used has a density of 0.924 g / cm 3 and a melting point of 113 ° C.
[0024]
(Comparative Example 2)
A packaging material having the following configuration was produced by co-extrusion.
LDPE (16 g / m 2 ) / substrate / LDPE (16 g / m 2 ) / LLDPE (20 g / m 2 )
For the outer layer and the inner layer, the same low density polyethylene as in Comparative Example 1 having a density of 0.924 g / cm 3 and a melting point of 113 ° C. was used. For the innermost layer, a linear low-density polyethylene having a density of 0.913 g / cm 3 and a melting point of 103 ° C., synthesized using a metallocene catalyst, was used.
[0025]
(Comparative test results of fragrance retention)
1 liter gable-top type container blanks were manufactured from the laminates shown in the above Examples and Comparative Examples, and filled with 100% concentrated and reduced orange juice using a filling machine. After the container was allowed to stand in a 10 ° C. atmosphere for 2 days, the fragrance retention was evaluated by a sensory test.
In the evaluation, the orange juice was packed in a glass bottle and sealed, and the fragrance retention was evaluated by a one-pair comparison method.
The results are shown below. The results are shown as the average of the scores of panelists who evaluated the flavor intensity of the orange juice in each paper container relative to the five levels of 1, 2, 3, 4, and 5, with the flavor of the orange juice filled in the glass bottle being set to 5. Was.
Reference 5.0
Example 1 3.2
Example 2 3.0
Example 3 3.4
Example 4 3.7
Comparative Example 1 2.2
Comparative Example 2 1.5
When compared to glass bottles that are considered to have substantially no sorption of flavor components, a decrease in flavor in the paper container is inevitable, but the flavor in the container of the example is clearly stronger than that of the comparative example. It can be judged that all the packaging materials of the examples have improved fragrance retention.
[0026]
【The invention's effect】
As described above, the packaging material of the present invention, the packaging container and the method of manufacturing the packaging material,
To provide a packaging material having excellent heat sealing properties while using a general-purpose inexpensive resin, having a fragrance retaining property such that a flavor component such as d-limonene does not escape from a container, and to provide a method for producing a packaging container and a packaging material. Can be.

Claims (3)

基材と最外熱可塑性材料層と最内熱可塑性材料層とから少なくともなる積層包装材料であって、少なくとも1の中間層が基材と該最内層との間に設けられ、該最内層と該中間層とがポリエチレン樹脂からなり、該中間層のポリエチレン樹脂の密度が最内層のポリエチレン樹脂の密度より高いことを特徴とする包装材料。A laminated packaging material comprising at least a substrate, an outermost thermoplastic material layer, and an innermost thermoplastic material layer, wherein at least one intermediate layer is provided between the substrate and the innermost layer, A packaging material, wherein the intermediate layer is made of a polyethylene resin, and the density of the polyethylene resin in the intermediate layer is higher than the density of the polyethylene resin in the innermost layer. 基材と、最外ポリエチレン層と、最内ポリエチレン層と、該基材と該最内層との間に設けられた少なくとも1の中間層と、から少なくともなる積層包装材料より形成された包装容器であって、該最内層及び該中間層のポリエチレンの密度が連続的若しくは不連続的に内側から外側に向けて高くなることを特徴とする包装容器。A packaging container formed from a laminated packaging material comprising at least a base material, an outermost polyethylene layer, an innermost polyethylene layer, and at least one intermediate layer provided between the base material and the innermost layer. A packing container, wherein the density of polyethylene in the innermost layer and the intermediate layer increases continuously or discontinuously from the inside to the outside. 基材と最外熱可塑性材料層と最内熱可塑性材料層とから少なくともなる積層包装材料の製造方法であって、少なくとも1の中間層が基材と該最内層との間に押出しラミネーションにより設け、該最内層と該中間層とがポリエチレン樹脂からなり、該中間層のポリエチレン樹脂の密度が最内層のポリエチレン樹脂の密度より高く、該中間層のフィルムに金属蒸着膜が形成されていることを特徴とする包装材料の製造方法。A method for producing a laminated packaging material comprising at least a substrate, an outermost thermoplastic material layer, and an innermost thermoplastic material layer, wherein at least one intermediate layer is provided between the substrate and the innermost layer by extrusion lamination. The innermost layer and the intermediate layer are made of a polyethylene resin, the density of the polyethylene resin of the intermediate layer is higher than the density of the polyethylene resin of the innermost layer, and a metal-deposited film is formed on the film of the intermediate layer. Characteristic packaging material manufacturing method.
JP2002162677A 2002-06-04 2002-06-04 Packaging material, packaging container, and method of manufacturing the packaging material Pending JP2004010067A (en)

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PCT/JP2003/006975 WO2003101732A1 (en) 2002-06-04 2003-06-03 Packaging material, packaging case and method for producing packaging material

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029597A1 (en) * 2009-09-11 2011-03-17 Tetra Laval Holdings & Finance S.A. A barrier coated thermo-mechanically stable, heat sealable film, a packaging laminate comprising the film, a packaging container formed from the packaging laminate and a method for the production of the film
US9902124B2 (en) 2011-07-26 2018-02-27 Sig Technology Ag Robust planar composite with an intermediate layer of increased vicat softening temperature
US9902524B2 (en) 2011-07-26 2018-02-27 Sig Technology Ag Planar composite with layers of plastic of different Vicat softening temperatures

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Publication number Priority date Publication date Assignee Title
JPS5519522A (en) * 1978-07-29 1980-02-12 Yoshizaki Kozo Transparent hermetic seal packing body that have excellent longitudinal tear property
JPH07205972A (en) * 1994-01-18 1995-08-08 Dainippon Printing Co Ltd Paper container
JP2001225427A (en) * 2000-02-15 2001-08-21 Japan Polyolefins Co Ltd Thermoforming laminated sheet and method of manufacturing the same
JP2001225426A (en) * 2000-02-15 2001-08-21 Japan Polyolefins Co Ltd Laminate, method of manufacturing the same, and molded object
JP2001225428A (en) * 2000-02-15 2001-08-21 Japan Polyolefins Co Ltd Laminated sheet and method of manufacturing the same
JP4722264B2 (en) * 2000-08-07 2011-07-13 日本ポリオレフィン株式会社 Pouch
JP4788031B2 (en) * 2000-10-16 2011-10-05 大日本印刷株式会社 Laminated material for paper container making and paper container made using the same
JP2001213426A (en) * 2000-11-29 2001-08-07 Dainippon Printing Co Ltd Paper container

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029597A1 (en) * 2009-09-11 2011-03-17 Tetra Laval Holdings & Finance S.A. A barrier coated thermo-mechanically stable, heat sealable film, a packaging laminate comprising the film, a packaging container formed from the packaging laminate and a method for the production of the film
US9902124B2 (en) 2011-07-26 2018-02-27 Sig Technology Ag Robust planar composite with an intermediate layer of increased vicat softening temperature
US9902524B2 (en) 2011-07-26 2018-02-27 Sig Technology Ag Planar composite with layers of plastic of different Vicat softening temperatures

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