Developed a monomaterial (single material) paper high barrier package with a pulp recovery rate of over 85%.

Dai Nippon Printing · Jun 24 23:00

大日本印刷株式会社（DNP）は、食品・化粧品・医療品等の包装材として、紙の単一素材（モノマテリアル）にすることによって“リサイクルしやすさ”を高めながら、酸素や水蒸気等の透過を防ぐ“高いバリア性”を持つ環境配慮型のパッケージ用紙シートを2022年に開発し^＊1、サンプルを提供しています。今回、材料や加工方法をさらに改良することで、パルプ回収率85％以上^＊2を有する紙製ハイバリアモノマテリアルパッケージを完成させました。

紙製ハイバリアモノマテリアルシートを使ったパッケージ

【紙製ハイバリアモノマテリアルシートの開発背景と概要】

気候変動や地球温暖化、プラスチックによる海洋汚染等の環境課題の解決に向け、国内外の大手メーカーや小売流通業は商品を開発・提供する際、石油由来から植物由来の材料への切り替えや、堆肥化可能な生分解性の材料の使用などによるパッケージによる環境負荷の低減に努めています。欧米では近年、紙製パッケージのリサイクル性の１つの指標としてパルプ回収率を80％以上とするなど、資源としての再生効果の向上を進めています。

こうした中でDNPは、「DNP環境配慮パッケージング GREEN PACKAGING」^＊3の製品ラインアップの拡充に努めています。今回、2022年に開発した紙製モノマテリアルシートをさらに改良し、ハイバリア機能を維持したままでリサイクル性を高めた製品の提供を開始します。パルプ回収率を85%以上まで高めることで、循環型社会の実現に貢献すると共に、自然再生可能資源である紙の使用量を増やすことで、枯渇資源である石油由来の材料の利用を減らし、サプライチェーン全体でのCO₂の排出量削減にもつなげていきます。またハイバリア機能によるフードロス、在庫の破棄削減につなげます。

【紙製ハイバリアモノマテリアルシートの特長・メリット】

１．リサイクル性評価でパルプ回収率を85％以上まで高め、紙パッケージ資源のリサイクルに貢献

モノマテリアル基材として、一般的なクラフト紙、カードボードを使用しています。今回、リサイクル性評価でのパルプ回収率を使用する材料や加工方法の改良によって85%以上まで高めることで、紙によるパッケージの一層の資源循環リサイクルに貢献します。

２．高いバリア性を持つ紙製包材

紙はパルプ繊維が細かく絡み合う多孔質構造であり、酸素や水蒸気等を透過させないことが難しく、包装材に使用した場合、これまでは内容物を長期間保護することが困難でした。この課題に対してDNPは、独自のコンバーティング（材料加工）技術を活かして、紙では難しいとされてきたハイバリア域である酸素透過度（OTR）0.5cc／m²・day・atm^＊4以下、水蒸気透過度（WVTR）0.5g／m²・day^＊5以下を実現しています。

３．薄紙から厚紙までハイバリア性能とパルプ回収率を実現

薄紙（クラフト紙）だけでなく厚い板紙（カードボード）など、さまざまな用紙に対応し、ハイバリア性能と高いパルプ回収率を実現するとともに、折り曲げ加工後のバリア性の劣化を最小限に抑えることで、パッケージとして必要な機能を実現しています。

４．透明ハイバリア膜により、リサイクル時の金属微片の混入を防止

薄い透明材料で構成するハイバリア膜に、プラスチックのポリ塩化ビニリデン（PVDC）を使用していません。また、アルミ蒸着膜、アルミフィルム等も使っていないため、リサイクル時の微小な金属（アルミ）の混入がなく、再生したパルプの質の劣化（ダウングレード）を防ぎます。

【今後の展開】

DNPは、紙製ハイバリアモノマテリアルシートを食品・化粧品・医療品等のメーカーに提供していきます。また、独自のコンバーティング技術を活かして、バリア性等の機能を高めた環境配慮製品・サービスのラインアップを拡充し、環境負荷低減の需要が高まる国内外の市場に展開していきます。

なおDNPは、2024年6月26日（水）～28日（金）に東京ビッグサイトで開催される「第26回インターフェックスジャパン[医薬品][化粧品]製造展」のDNPブース（東3ホール・小間番号21-46）^＊6で本製品を紹介します。

＊1　紙製ハイバリアモノマテリアルシート → https://www.dnp.co.jp/news/detail/20167605_1587.html

＊2　紙の斤量によりパルプ回収率が変わります

＊3　GREEN PACKAGINGについて → https://www.dnp.co.jp/biz/products/detail/20172609_4986.html

＊4　酸素透過度：フィルムの物性値で、1気圧（atm）で1m²のフィルムに1日で通過する酸素の量。

＊5　水蒸気透過度：フィルムの物性値で、1m²のフィルムに1日で通過する水蒸気の量。

＊6　DNPの出展内容について → https://www.dnp.co.jp/biz/eventseminar/event/20173876_4966.html

※記載された製品の仕様、サービス内容などは発表日現在のものです。その後予告なしに変更されることがありますので、あらかじめご了承ください。

Dai Nippon Printing Co., Ltd. (DNP) has developed an environmentally friendly packaging paper sheet with a high barrier property that can prevent the permeation of oxygen and water vapor while increasing the recyclability by using a single material of paper (monomaterial) as a packaging material for food, cosmetics, medical supplies, etc. in 2022, and is offering samples. This time, we have completed a paper high-barrier monomaterial package with a pulp recovery rate of over 85% by further improving the materials and processing methods. The operating income of 100-300 billion yuan products is 401/1288/60 million yuan respectively.^*1We are providing a sample. We have completed a paper high-barrier monomaterial package with a pulp recovery rate of over 85% by further improving the materials and processing methods.^*2We have completed a paper high-barrier monomaterial package with a pulp recovery rate of over 85% by further improving the materials and processing methods.

Packages using a paper high-barrier monomaterial sheet

[Background and overview of paper high-barrier monomaterial sheet development]

In order to solve environmental issues such as climate change, global warming, and marine pollution caused by plastics, leading manufacturers and retailers in Japan and abroad are striving to reduce the environmental impact of packaging by switching from petroleum-derived to plant-derived materials and using compostable, biodegradable materials. In Europe and the United States, the improvement of the recycling effect as a resource, such as setting the pulp recovery rate to 80% or more as one indicator of the recyclability of paper packaging, has been promoted. Against this backdrop, DNP is working to expand its product lineup of environmentally friendly packaging called "DNP Green Packaging". This time, we will begin offering products that maintain high barrier functions while improving recyclability by further improving the paper monomaterial sheet developed in 2022 and increasing the pulp recovery rate to 85% or more. This will contribute to the realization of a circular society by increasing the use of paper, a naturally renewable resource, and reducing the use of materials derived from petroleum, a depleted resource, and reducing CO₂ emissions throughout the supply chain. It will also lead to reducing food loss and inventory disposal through high barrier functions.

DNP is working to expand its product lineup of environmentally friendly packaging called "DNP Green Packaging".^*3This time, we will begin offering products that maintain high barrier functions while improving recyclability by further improving the paper monomaterial sheet developed in 2022 and increasing the pulp recovery rate to 85% or more. This will contribute to the realization of a circular society by increasing the use of paper, a naturally renewable resource, and reducing the use of materials derived from petroleum, a depleted resource, and reducing CO₂ emissions throughout the supply chain. It will also lead to reducing food loss and inventory disposal through high barrier functions.

[Features and benefits of paper high-barrier monomaterial sheets]

1. We improve the pulp recovery rate to over 85% in the recyclability evaluation and contribute to the recycling of paper package resources.

As a monomaterial base material, we use common kraft paper and cardboard. This time, by improving the materials and processing methods used to achieve a pulp recovery rate of over 85% in the recyclability evaluation, we will contribute to further recycling of paper packages.

2. A paper-based packaging material with a high barrier property.

Paper is a porous structure in which pulp fibers are finely intertwined, making it difficult to transmit oxygen, water vapor, etc., and in the past, it has been difficult to protect contents for a long time when used as a packaging material. In response to this challenge, DNP has utilized its own converting (material processing) technology to achieve an oxygen permeability (OTR) of less than 0.5cc/m²-day-atm and a water vapor permeability (WVTR) of less than 0.5g/m²-day, which are high barrier areas that have been difficult to achieve with paper. is realized.²- day - atm^*4Below, the water vapor transmission rate (WVTR) is 0.5g/m²- day^*5or less.

3. Achieves high barrier performance and pulp recovery rate from thin to thick paper

It not only responds to thin paper (kraft paper) but also to various types of paper such as thick cardboard. With high-barrier performance and a high pulp recovery rate, it achieves the necessary functions as a package by minimizing the deterioration of barrier performance after folding and processing.

4. Prevents the mixing of metal particles during recycling with a transparent high-barrier film

This high-barrier film is made of thin transparent material and does not use plastics such as polyvinylidene chloride (PVDC). In addition, it does not use aluminum vapor deposition film, aluminum foil, etc., so there is no slight metal (aluminum) contamination during recycling, preventing the downgrading of the quality of recycled pulp.

Future developments

DNP will provide paper-based high-barrier monomaterial sheets to manufacturers of food, cosmetics, medical supplies, etc. In addition, by leveraging its unique converting technology, it will expand its lineup of environmentally friendly products and services that enhance functions such as barrier properties, and expand into domestic and overseas markets where demand for reducing environmental impact is increasing.

DNP will introduce this product at the DNP booth (East 3 Hall, Booth No. 21-46) at the 26th Interphex Japan [Pharmaceuticals/Cosmetics] Manufacturing Exhibition, which will be held at Tokyo Big Sight from June 26 (Wed) to June 28 (Fri), 2024.^{As part of this effort,}Introducing this product at -day.

Paper-based high-barrier monomaterial sheet → https://www.dnp.co.jp/news/detail/20167605_1587.html

The pulp recovery rate varies depending on the weight of the paper.

About GREEN PACKAGING → https://www.dnp.co.jp/biz/products/detail/20172609_4986.html

Oxygen permeability: The amount of oxygen that passes through a film in one day at 1 atm pressure per meter of film.²The amount of oxygen passing through the film in one day.

Water vapor permeability: The amount of water vapor that passes through a film in one day per meter of film.²The amount of water vapor passing through the film in one day.

DNP's exhibition content → https://www.dnp.co.jp/biz/eventseminar/event/20173876_4966.html

* The specifications and service contents of the listed products are as of the date of announcement. Please note that they may be subject to change without notice.

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パルプ回収率85％以上を有するモノマテリアル（単一素材）の紙製ハイバリアパッケージを開発