SHISEIDO CO., LTDLion CorporationTOYO INK CO., LTD.1We have developed a groundbreaking technology aimed at promoting both the reduction of plastic usage and the enhancement of recyclability in stand-up pouches for refill products. Usually, these pouches are composed of multi-layer films using adhesives to combine polyolefin sealant layers with films like polyester and polyamide. This combination provides essential container performance, including content protection and impact resistance, while also contributing to plastic usage reduction. However, the mixed-material structure of these laminates complicates high-quality material recycling and hinders resource recovery. To address this challenge, we embarked on creating a stand-up pouch that balances reduced plastic usage with improved recyclability by developing a method to facilitate the separation and recovery of single-material components. Our innovative process uses an alkaline aqueous solution to peel the laminated layers and employ density separation. During this process, the laminates are crushed to expose and subsequently dissolve the adhesive layers using alkaline treatment. This treatment weakens the bond between the outer film layers (nylon or PET) and the polyethylene sealant film, allowing them to separate. The denser outer film sinks, and the less dense polyethylene film floats, enabling the collection of high-purity polyethylene. Successfully, after numerous trials, we developed an advanced adhesive capable of withstanding exposure to contents, including surfactants, while ensuring it dissolves only upon contact with the alkaline solution post-crushing. Our meticulous exploration of various adhesive compositions led us to achieve this equilibrium. Consequently, we introduced these new stand-up pouches in Japan in November 2024, maintaining the same level of content protection and physical strength as traditional pouches while offering an efficient method for recovering high-purity polyethylene through alkaline treatment.In addition to reducing CO2 emissions, this packaging is designed to give consumers a tangible sense of contributing to the environment—something that has been difficult to perceive. To achieve this, our innovative “LiquiForm” technology which combines both bottle manufacturing and content filling in a single step, is incorporated to be visible on the exterior as part of the main container. By blending environmental awareness with the concepts of premium quality and sustainability, we deliver a fresh new value that resonates with our consumers.C02削減の実現に加えて、今回、これまで生活者が感じにくかった「環境への貢献実感」を感じられるように、「ボトル製造」と「中味液充填」をワンステップで実現する技術「LiquiForm」を主容器の一部として外側に出した仕様とした。プレミアム／サステナビリティに「環境実感」を加え、生活者に新たな価値を届けます。目的材料であるポリオレフィンとその他異材質を容易に分離することができるつめかえ用パウチを開発した。生活者が使用するまで内容物を保護するための「耐剥離性」とフィルム同士を分離し易くするための「易剥離性」といった相反する機能を両立させるために、界面活性剤等による層間剥離抑制のための成分（耐剥離性向上）とアルカリでの加水分解反応によって層間の接着力が低下する成分（易剥離性向上）の 最適な組み合わせを選定した易剥離接着剤を開発し、従来パウチと同等レベルの包材品質を実現した。本技術により、高品質な再生ポリオレフィンを確保することが可能となり、軟包材での再生材活用促進及び配合率向上が期待できる。株式会社資生堂ライオン株式会社東洋インキ株式会社★ジャパンスター賞Minister of Economy, Trade and Industry AwardIPSA MEDirector-General for GX Promotion, Ministry of Economy, Trade and Industry AwardDevelopment of Flexible Packages Separable into Single Material by Delamination経済産業大臣賞『イプサME』経済産業省 脱炭素成長型経済構造移行推進審議官賞『易剥離接着剤を活用したリサイクル性を向上させたつめかえパウチの開発』Japan Star
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