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An attempt was made to carry out a dry—-spinning of cellulose triacetate (CTA) filament yarns in a solution of acetone. Mixture of the CTA and acetone was cooled down to — 70•Ž and then heated up to 50•Ž .with stirring to prepare a stable spinning solution. From the solution CTA filament yarns were dry-spinned by using the large—scale, commercially available spining machine for cellulose diacetate filament yarns. The CTA filament yarns thus produced are almost same in their structural and physical properties as the CTA filament yarns on the market, which have been dry-pinned from a solution of methylene chloride. (Received February 10, 1981) 摘 要 アセ トンを紡糸 溶媒と して三酢酸 セルロース(結 合酢酸量58.8~61%)の 紡 糸 を試み た.三 酢酸 セル ロー スとアセ トンの混合物 を一70°C に冷却 し,50°C まで昇温中に撹搾す ることによって安定 な紡糸原液が調製 できた.こ の紡糸原液を二酢酸 セルロース繊維 商業生 産用紡 糸機 を利用 して紡糸 し,市 販 の三酢酸 セルロース繊維 とほぼ同等の繊維構造 と物性 を持つ三酢酸セルロース繊 維 を得 た.(昭 和56年2月10日 受理 〉

Dry Spinning of Cellulose Triacetate Filament Yarns from Solution of Acetone