紡績双糸の強伸度について

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書誌事項

タイトル別名
  • Strength and Elongation of the Two-fold Staple Yarn
  • ボウセキ ソウシ ノ キョウシンド ニ ツイテ
公開日
1970
DOI
  • 10.4188/transjtmsj1965b.23.t109
公開者
一般社団法人 日本繊維機械学会

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説明

The strength and elongation of two-fold staple yarn have been analyzed here. Experimental data obtained show that the calculated strength and elongation agree well with the observed one. The main results are what follows :<BR>1) When a two-fold staple yarn is broken, a pressure is produced in the yarn. The pressure is determined mainly by following function. This function is called pressure function.<BR>F(θR', β)=1+ (log cosθR'/tan2θR')(2-4πΔsin2β)<BR>And, θR' : Bottom twist angle of the single yarn in the two-fold yarn.<BR>β : Ply twist helix angle.<BR>Δ : Coefficient<BR>The pressure function of single yarn is :<BR>F(θR)=1+2 log cosθR/tan2θR<BR>where θR is the twist helix angle of single yarn, and θR is the twist helix angle of single yarn.<BR>2) The strength-twist curve of single yarn can be converted into the strength-pressure function curve, and the strength-bottom twist, ply twist curve of two-fold yarn into the strength-pressure function curve. The two strength-pressure function curve are the same essentially. So that, from the strength-twist curve of single yarn the strength-bottom twist, ply twist curve of two-fold yarn can be explained.

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