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Characteristics of Microplastics Emissions from Fabrics with Different Designs by Laundering
Summary
This study (in Japanese) examined how the design of polyester fabric — including yarn type and fabric structure — affects the release of microplastic fibers during washing. Continuous filament yarn released 42–45% fewer microplastic fibers than staple yarn, and fabric washed without softener released 22–25% fewer fibers than softener-treated fabric.
近年，環境中のマイクロプラスチックファイバー（以下，MPFs）の存在が明らかになり，要因の一つに衣類の洗濯による排出が指摘されている．本研究では，洗濯による生地設計別のMPFsの排出特性を把握することを主目的とした．糸（長繊維・短繊維），編立（プレーン・メッシュ），加工（柔軟剤無し・柔軟剤有り）で設計を分けたポリエステル生地を8タイプ開発し，ドラム型洗濯機の標準コースで洗濯後，目開き10μmのプランクトンネットでMPFsを捕集した．目的変数をMPFs重量とした3元配置分散分析では，糸の寄与率74.5%，加工の寄与率18.7%となり排出量の主要因であることが示された．糸の長繊維は短繊維に対し中央値で42～45%小さく，加工の柔軟剤無しは柔軟剤有りに対し中央値で22～25%小さい結果となった．
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