Non-destructive structural analysis of needle punching non-woven fabric by X-ray CT

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K02089
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 08030:Family and consumer sciences, and culture and living-related
• Research Institution: Shinshu University
• Principal Investigator: Kim KyoungHou 信州大学, 学術研究院繊維学系, 教授 (30504550)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 不織布 / XCT観察 / トレーサー繊維 / 不織布の変形 / 定量的評価

Outline of Final Research Achievements

We prepared a Nylon/AgI tracer fiber and succeeded in visualizing only the tracer fiber in a needle punch (NP) nonwoven fabric using X-ray CT. We made a nonwoven fabric consisting of three layers of nylon fiber web and one layer of Nylon/AgI tracer fiber web, visualized only the tracer fiber portion, and calculated the volume fraction of fibers moving from the first, second, and third layers. We prepared also Nylon/CuI tracer fiber which has a different X-ray absorption coefficient with Nylon/AgI tracer fiber, and analyzed the visualization of the NP nonwoven fabric structure prepared using the two types of tracer fiber and the fiber movement to the fourth layer or lower, and evaluated how the fibers move from different positions in the sample and affect the pilar-like fiber bundles and stitch structure that are formed.

Free Research Field

不織布、繊維集合体

Academic Significance and Societal Importance of the Research Achievements

不織布とは, 繊維同士が機械的な交絡, もしくは熱・化学的な接着により結合したシート状の繊維集合体のことである.現在では繊維産業の約10%を占めている重要な繊維材料であるが,内部構造に関する定量的な解析など,不織布の機械的な物性発現メカニズムに関してもほとんど知られてなかった．提案されたトレーサー繊維とXCTを応用し，不織布の杭状繊維束やstitch構造など繊維集合体の構造を可視化及び定量評価することで，不織布の内部構造と物性との関係を明らかにする基礎研究が出来た.材料の微細構造をモデルかし強度発現メカニズムを明らかにする研究ができ,学術的および産業的にも価値がある研究になったと考えている．