JP3767501B2 - Exterior packaging materials - Google Patents

Exterior packaging materials Download PDF

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Publication number
JP3767501B2
JP3767501B2 JP2002073740A JP2002073740A JP3767501B2 JP 3767501 B2 JP3767501 B2 JP 3767501B2 JP 2002073740 A JP2002073740 A JP 2002073740A JP 2002073740 A JP2002073740 A JP 2002073740A JP 3767501 B2 JP3767501 B2 JP 3767501B2
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Japan
Prior art keywords
layer
packaging material
paper
exterior packaging
exterior
Prior art date
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Expired - Fee Related
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JP2002073740A
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Japanese (ja)
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JP2003267433A (en
Inventor
彰男 福田
勝美 丸林
啓二郎 大森
裕二 原田
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Toppan Inc
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Toppan Inc
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Publication date
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Description

【0001】
【発明の属する技術分野】
個装したガムやキャンディー等を外装するための包装材料に関するものである。
【0002】
【従来の技術】
従来、個装した粒状のガムやキャンディー等を数個並べたものを集積包装する外装用包装材料は、主に基材層、アルミニウム箔、紙層などを積層した積層体が使用されている。この外装用包装材料の基材層には、一般的にヒートシール性を付与する為に塩化ビニル・酢酸ビニル共重合体樹脂または塩化ビニリデン系樹脂を主成分としたコート剤を表面全面にコーティングした防湿セロファンが使用されている。
【0003】
【発明が解決しようとする課題】
しかしながら、前記コート剤はその樹脂成分に塩素を含有している。近年のダイオキシン問題などから、塩素を含む材料は敬遠される傾向があり、塩素を含まない代替え品が要望されている。これらの代替え品として非塩素系樹脂、例えばアクリル系樹脂を主成分とするコート剤を表面全面にコーテイングした防湿セロファンが使用されていたが、ヒートシール強度が弱く、ヒートシール性を向上させる為にさらにその上にシール層をパートコートしたものが検討されているが、巻き取り段階でこのシール層と最外面の紙層がブロッキングするなどの問題を生じていた。
【0004】
本発明の課題は、巻き取り保存時にブロッキングすることがなく、個包装済みの内容物を集積包装する時のヒートシール性も良好で、かつ、環境に優しい外装用包装材料を提供することにある。
【0005】
【課題を解決するための手段】
本発明の請求項1に係る発明は、個包装済みの内容物を集積包装する外装用包装材料であって、基材層の一方の面にアルミニウム箔、紙層、ワックス層、紙層を順次積層し、他方の面にビカット軟化点50℃以上のエチレン・酢酸ビニル共重合体樹脂を主成分とするコート剤からなるシール層を基材層の流れ方向と平行に線状にグラビアコート法で積層した積層体からなることを特徴とする外装用包装材料である。
【0006】
【発明の実施の形態】
本発明の外装用包装材料を、実施の形態に沿って以下に詳細に説明する。
【0007】
図1は本発明の一実施形態の外装用包装材料を説明した図であり、最外面から順に厚み方向に、シール層(7)、基材層(1)、接着剤層(2)、アルミニウム箔(3)、接着剤層(4)、紙層(5a)、ワックス層(6)、紙層(5b)が順次積層されている。
【0008】
前記基材層(1)は、普通セロファン、非塩素系樹脂コートセロファン、延伸ポリエステルフィルムなどを使用する。
【0009】
前記アルミニウム箔(3)の厚みは、6〜12μmの範囲が好ましい。
【0010】
前記紙層(5a)には、坪量30〜65g/m2 の純白ロール紙、上質紙、クラフト紙等のいずれかの紙を使用し、紙層(5b)には、坪量14〜23g/m2 の薄葉紙を使用する。
【0011】
前記ワックス層(6)には、パラフィンワックス、ポリエチレンワックス、マイクロクリスタリンワックス等のワックス単独若しくはそれらの混合物を使用し、塗布量は25〜30g/m2 の範囲が好ましい。
【0012】
前記基材層(1)にアルミニウム箔(3)を積層する方法は、ポリウレタン系接着剤からなる接着剤層(2)を介し、公知のドライラミネート法で積層する。
【0013】
前記アルミニウム箔(3)に紙層(5a)を積層する方法は、酢酸ビニル系樹脂を主成分としたエマルジョン型接着剤からなる接着剤層(4)を介し、公知のウェットラミネーション法で積層する。
【0014】
前記紙層(5a)に紙層(5b)を積層する方法は、ロールコーティング法で塗布したワックス層(6)を介し、公知の方法で積層する。
【0015】
前記シール層(7)は、巻き取り時にブロッキングし難く、集積包装時に容易に熱接着できるように、ビカット軟化点が50℃以上のエチレン・酢酸ビニル共重合体樹脂(EVA樹脂)を主成分とするコート剤を基材層(1)の流れ方向(8)と平行に線状にパートコートして積層する。積層方法は公知のグラビアコート法で積層する。塗布量は0.5〜10g/m2(乾燥状態)の範囲で適宜選択する。前記ビカット軟化点とは、JIS K−6730に規定されているビカット軟化点である。
【0016】
【実施例】
本発明の外装用包装材料を具体的な実施例を挙げて説明する。
【0017】
〈実施例1〉
基材層(1)として、片面に非塩素系樹脂コートした300番の防湿セロファンを使用し、その防湿セロファンの非コート面にポリウレタン系接着剤を乾燥状態で3g/m2 塗布し、その上に厚さ7μmのアルミニウム箔をドライラミネートした。続いて、前記アルミニウム箔面に酢酸ビニル系エマルジョン接着剤を湿潤状態で9g/m2 塗布し、その上に坪量35g/m2 の純白ロール紙をウェットラミネートした。さらに、前記純白ロール紙面にビカット軟化点80℃のポリエチレンワックスを乾燥状態で30g/m2 塗布し、その上に坪量14g/m2 の薄葉紙をラミネートした。最後に、前記防湿セロファンの非塩素系樹脂コート面にシール層(7)として、ビカット軟化点70℃のエチレン・酢酸ビニル共重合体樹脂を主成分とするコート剤〔東洋モートン(株)、商品名‘AD1536−15’〕を防湿セロファンの流れ方向と平行に線状に塗布量1.5g/m2(乾燥状態)でパートコートし、本発明の外装用包装材料を得た。
【0018】
〈比較例1〉
実施例1において、シール層(7)として、塩化ビニリデン系樹脂を主成分とするコート剤を使用した以外、同様にして比較用の外装用包装材料を得た。
【0019】
〈比較例2〉
実施例1において、シール層(7)として、アクリル系樹脂を主成分とするコート剤を使用した以外、同様にして比較用の外装用包装材料を得た。
【0020】
〈比較例3〉
実施例1において、シール層(7)として、ビカット軟化点40℃のエチレン・酢酸ビニル共重合体樹脂を主成分とするコート剤を使用した以外、同様にして比較用の外装用包装材料を得た。
【0021】
〈評価〉
実施例1及び比較例1〜3の外装用包装材料を用いて、以下に示す測定方法でシール強度及びブロッキング性を評価した。その結果を表1に示す。
(1)シール強度測定方法
作成した外装用包装材料を2枚スリットし、1枚の外装用包装材料のシール層面に、他の1枚の外装用包装材料のシール層を重ね合わせて、上からシール温度120℃、シール圧力0.2MPa、シール時間2秒の条件でヒートシールした。ヒートシールした試験片を15mm幅にスリットし、引っ張りスピード300mm/min、90度剥離でシール強度を測定した。
(2)ブロッキング性測定方法
作成した外装用包装材料を2枚スリットし、1枚の外装用包装材料のシール層面に、他の1枚の外装用包装材料の最外面の薄葉紙を重ね合わせて、上から温度38℃、圧力0.03MPaで加圧した状態で常温で24時間放置後、ブロッキングの有無を確認した。
【0022】
【表1】

Figure 0003767501
【0023】
表1に示すように、実施例1の外装用包装材料は巻き取り保存時にブロッキングせず、シール強度も良好で、かつ、焼却時に塩素ガスの発生もない。比較例1の外装用包装材料は焼却時に塩素ガスを発生する。比較例2の外装用包装材料はシール性が不良である。比較例3の外装用包装材料はブロッキングが発生する。
【0024】
【発明の効果】
本発明の外装用包装材料は、個包装済みの内容物を集積包装する外装用包装材料であって、基材層の一方の面にアルミニウム箔、紙層、ワックス層、紙層を順次積層し、他方の面にビカット軟化点50℃以上のエチレン・酢酸ビニル共重合体樹脂を主成分とするコート剤からなるシール層を基材層の流れ方向と平行に線状にグラビアコート法で積層しているので、積層体を巻き取り状態にした時にシール層と最外面の紙層がブロッキングすることもなく、個包装した内容物を集積包装する時のシール性も良好で、かつ、廃棄焼却時に塩素ガスの発生がない優れた外装用包装材料である。
【図面の簡単な説明】
【図1】本発明の一実施例の外装用包装材料の説明図である。
【符号の説明】
1…基材層
2…接着剤層
3…アルミニウム箔
4…接着剤層
5a,5b…紙層
6…ワックス層
7…シール層
8…流れ方向[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging material for packaging a gum or candy packaged individually.
[0002]
[Prior art]
Conventionally, a laminated body in which a base material layer, an aluminum foil, a paper layer, and the like are laminated is mainly used as an exterior packaging material for accumulating and packaging a plurality of individually arranged granular gums, candies, and the like. The base material layer of the packaging material for exterior packaging is generally coated on the entire surface with a coating agent mainly composed of vinyl chloride / vinyl acetate copolymer resin or vinylidene chloride resin in order to provide heat sealability. Moisture-proof cellophane is used.
[0003]
[Problems to be solved by the invention]
However, the coating agent contains chlorine in its resin component. Due to the dioxin problem in recent years, materials containing chlorine tend to be avoided, and there is a demand for alternatives that do not contain chlorine. As a substitute for these, moisture-proof cellophane coated with non-chlorine resin, for example, a coating agent mainly composed of acrylic resin, was used on the entire surface, but the heat seal strength was weak and the heat sealability was improved. In addition, a part-coated seal layer has been studied, but problems such as blocking of the seal layer and the outermost paper layer occurred at the winding stage.
[0004]
An object of the present invention is to provide an environmentally friendly packaging material for external packaging that does not block during winding and storage, has good heat-sealability when stacking and packaging individually packed contents. .
[0005]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is an exterior packaging material for collecting and packaging individually packaged contents, and an aluminum foil, a paper layer, a wax layer, and a paper layer are sequentially formed on one surface of the base material layer. A sealing layer made of a coating agent mainly composed of an ethylene / vinyl acetate copolymer resin having a Vicat softening point of 50 ° C. or higher is linearly formed in parallel with the flow direction of the base layer on the other surface by a gravure coating method . An exterior packaging material comprising a laminated body.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The packaging material for exterior of this invention is demonstrated in detail below along embodiment.
[0007]
FIG. 1 is a diagram for explaining an exterior packaging material according to an embodiment of the present invention. In order from the outermost surface, a sealing layer (7), a base material layer (1), an adhesive layer (2), aluminum are arranged in the thickness direction. A foil (3), an adhesive layer (4), a paper layer (5a), a wax layer (6), and a paper layer (5b) are sequentially laminated.
[0008]
The base material layer (1) uses ordinary cellophane, non-chlorine resin-coated cellophane, stretched polyester film, or the like.
[0009]
The thickness of the aluminum foil (3) is preferably in the range of 6 to 12 μm.
[0010]
For the paper layer (5a), a pure white roll paper having a basis weight of 30 to 65 g / m 2 , high-quality paper, kraft paper or the like is used. For the paper layer (5b), a basis weight of 14 to 23 g is used. Use thin paper of / m 2 .
[0011]
For the wax layer (6), wax such as paraffin wax, polyethylene wax, microcrystalline wax or the like is used alone or a mixture thereof, and the coating amount is preferably in the range of 25-30 g / m 2 .
[0012]
The aluminum foil (3) is laminated on the base material layer (1) by a known dry laminating method through an adhesive layer (2) made of a polyurethane adhesive.
[0013]
A method of laminating the paper layer (5a) on the aluminum foil (3) is performed by a known wet lamination method through an adhesive layer (4) made of an emulsion type adhesive mainly composed of vinyl acetate resin. .
[0014]
The paper layer (5b) is laminated on the paper layer (5a) by a known method through the wax layer (6) applied by a roll coating method.
[0015]
The sealing layer (7) is mainly composed of an ethylene / vinyl acetate copolymer resin (EVA resin) having a Vicat softening point of 50 ° C. or higher so that it is difficult to block during winding and can be easily heat-bonded during integrated packaging. The coating agent to be coated is part-coated linearly in parallel with the flow direction (8) of the base material layer (1) and laminated. Lamination is performed by a known gravure coating method. The coating amount is appropriately selected within the range of 0.5 to 10 g / m 2 (dry state). The Vicat softening point is a Vicat softening point defined in JIS K-6730.
[0016]
【Example】
The exterior packaging material of the present invention will be described with reference to specific examples.
[0017]
<Example 1>
As base material layer (1), No. 300 moisture-proof cellophane coated with non-chlorine resin on one side was used, and 3 g / m 2 of polyurethane-based adhesive was applied in a dry state to the non-coated surface of the moisture-proof cellophane. An aluminum foil having a thickness of 7 μm was dry laminated. Subsequently, 9 g / m 2 of vinyl acetate emulsion adhesive was applied to the aluminum foil surface in a wet state, and a pure white roll paper having a basis weight of 35 g / m 2 was wet-laminated thereon. Further, 30 g / m 2 of polyethylene wax having a Vicat softening point of 80 ° C. was applied in a dry state on the surface of the pure white roll paper, and a thin paper having a basis weight of 14 g / m 2 was laminated thereon. Finally, as a seal layer (7) on the non-chlorine resin-coated surface of the moisture-proof cellophane, a coating agent comprising a Vicat softening point ethylene / vinyl acetate copolymer resin as a main component [Toyo Morton Co., Ltd. The name “AD1536-15”] was part-coated linearly in parallel with the flow direction of the moisture-proof cellophane at a coating amount of 1.5 g / m 2 (dry state) to obtain an exterior packaging material of the present invention.
[0018]
<Comparative example 1>
In Example 1, a comparative packaging material for comparison was obtained in the same manner except that a coating agent mainly composed of vinylidene chloride resin was used as the seal layer (7).
[0019]
<Comparative example 2>
In Example 1, an outer packaging material for comparison was obtained in the same manner except that a coating agent mainly composed of an acrylic resin was used as the seal layer (7).
[0020]
<Comparative Example 3>
In Example 1, a packaging material for comparison was obtained in the same manner except that a coating agent mainly composed of an ethylene / vinyl acetate copolymer resin having a Vicat softening point of 40 ° C. was used as the seal layer (7). It was.
[0021]
<Evaluation>
Using the packaging materials for exteriors of Example 1 and Comparative Examples 1 to 3, seal strength and blocking properties were evaluated by the following measurement methods. The results are shown in Table 1.
(1) Seal strength measuring method Two pieces of the outer packaging material prepared are slit, and the seal layer of the other outer packaging material is superimposed on the surface of the sealing layer of one outer packaging material. Heat sealing was performed under conditions of a sealing temperature of 120 ° C., a sealing pressure of 0.2 MPa, and a sealing time of 2 seconds. The heat-sealed test piece was slit into a width of 15 mm, and the sealing strength was measured by peeling at 90 ° at a pulling speed of 300 mm / min.
(2) Two blocking packaging materials prepared for the blocking property measurement method are slit, and the outermost thin paper of the other packaging material is overlaid on the seal layer surface of one packaging material, After standing at room temperature for 24 hours in a state pressurized from above at a temperature of 38 ° C. and a pressure of 0.03 MPa, the presence or absence of blocking was confirmed.
[0022]
[Table 1]
Figure 0003767501
[0023]
As shown in Table 1, the packaging material for exterior use of Example 1 does not block during winding and storage, has good sealing strength, and does not generate chlorine gas during incineration. The exterior packaging material of Comparative Example 1 generates chlorine gas during incineration. The packaging material for exterior of Comparative Example 2 has poor sealing properties. The exterior packaging material of Comparative Example 3 is blocked.
[0024]
【The invention's effect】
The exterior packaging material of the present invention is an exterior packaging material that collects and wraps the individually packaged contents, and an aluminum foil, a paper layer, a wax layer, and a paper layer are sequentially laminated on one surface of the base material layer. A seal layer made of a coating agent mainly composed of an ethylene / vinyl acetate copolymer resin having a Vicat softening point of 50 ° C. or higher is laminated on the other surface linearly in parallel with the flow direction of the base material layer by a gravure coating method. Therefore, when the laminate is wound up, the sealing layer and the outermost paper layer do not block, the sealing property when collecting the individually packed contents is good, and at the time of disposal incineration It is an excellent exterior packaging material that does not generate chlorine gas.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an exterior packaging material according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Base material layer 2 ... Adhesive layer 3 ... Aluminum foil 4 ... Adhesive layer 5a, 5b ... Paper layer 6 ... Wax layer 7 ... Seal layer 8 ... Flow direction

Claims (1)

個包装済みの内容物を集積包装する外装用包装材料であって、基材層の一方の面にアルミニウム箔、紙層、ワックス層、紙層を順次積層し、他方の面にビカット軟化点50℃以上のエチレン・酢酸ビニル共重合体樹脂を主成分とするコート剤からなるシール層を基材層の流れ方向と平行に線状にグラビアコート法で積層した積層体からなることを特徴とする外装用包装材料。 A packaging material for exterior packaging that collects and packs individually packed contents, in which an aluminum foil, a paper layer, a wax layer, and a paper layer are sequentially laminated on one side of a base material layer, and a Vicat softening point 50 on the other side. It is characterized by comprising a laminate in which a sealing layer composed of a coating agent mainly composed of an ethylene / vinyl acetate copolymer resin at a temperature of ℃ or higher is laminated linearly in parallel with the flow direction of the substrate layer by a gravure coating method Exterior packaging material.
JP2002073740A 2002-03-18 2002-03-18 Exterior packaging materials Expired - Fee Related JP3767501B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100825520B1 (en) * 2006-10-12 2008-04-28 이일동 Multi-layered packaging sheet comprising a wax layer and packaging bags manufactured therefrom

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007062786A (en) * 2005-08-30 2007-03-15 K & N:Kk Easily releasable food packaging paper, easily releasable food container using this and method for using it, and easily releasable laminate
JP6232006B2 (en) * 2015-02-28 2017-11-15 東洋アルミニウム株式会社 Packaging material and manufacturing method thereof

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JPH01115539U (en) * 1988-01-29 1989-08-03
JP2537795Y2 (en) * 1991-02-15 1997-06-04 大日本印刷株式会社 Packaging material
JP3315518B2 (en) * 1994-03-31 2002-08-19 旭化成株式会社 Heat shrinkable multilayer film
JP4668373B2 (en) * 1999-06-24 2011-04-13 大日本印刷株式会社 Battery exterior laminate
JP2004001876A (en) * 2002-03-01 2004-01-08 Dainippon Ink & Chem Inc Cover tape for carrier tape having adhesion preventive layer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100825520B1 (en) * 2006-10-12 2008-04-28 이일동 Multi-layered packaging sheet comprising a wax layer and packaging bags manufactured therefrom

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