気相処理によるアラミド繊維の高機能化と応用
■繊維生活部 守田啓輔 沢野井康成
アラミド繊維は，高強度，高耐熱性等の優れた特長を有する反面，機能加工剤との密着性が低いため，後加工により機能性及び耐久性を付与しにくいことが実用面での課題とされている。本研究では，アラミド繊維に機能性と耐久性を付与する目的で，活性ガス(フッ素ガスと二酸化硫黄ガス)を用いた気相処理を行った。気相処理したアラミド布帛に対し，機能加工(撥水，帯電防止，防汚，抗菌)をそれぞれ行った場合の洗濯耐久性を評価した。その結果，アラミド繊維への気相処理により機能加工剤の密着性が増大したため，気相処理を行わない試料に比べて，繰返し洗濯後も機能性の低下が抑制された。気相処理後に機能加工したアラミド布帛を使用して，撥水性を有する手袋及び消防服，帯電防止性を有する作業着，防汚性を有する靴をそれぞれ試作した。
キーワード: アラミド繊維，活性ガス，フッ素ガス，二酸化硫黄ガス，機能加工
Functionalization and Application of Aramid Fiber by Exposure to Active Gas
Keisuke MORITA and Yasunari SAWANOI
Aramid fiber has excellent tensile strength and heat stability, but the interaction between its surface and the finishing agent is not strong enough. The adhesion of finishing agents for application of aramid fiber to functional products requires improvement. In this study, we pre-treated aramid fiber by exposing it to active gas (fluorine gas and sulfur dioxide gas) for the purpose of increasing its durability and functionality. We evaluated aramid fiber that had been gas-treated and finished with coatings for hydrophobicity, prevention of static electricity, release of soil, and bacteria repulsion, for washing durability. The results showed that because the gas treatment caused increased adhesiveness of the finishing agents, even after repeated washings the properties were better maintained compared with fiber that was not gas-treated. Using aramid fibers that were first gas-treated, and then coated to give them various functional properties, we made trial products such as hydrophobic gloves, hydrophobic firefighter uniforms, antistatic work clothes, and soil-releasing shoes.
Keywords : aramid fiber, active gas, fluorine gas, sulfur dioxide gas, functionalization
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