絹和服地の地直しに関する研究(第5報) : 縮緬の地直し処理が和針の布通し力にあたえる影響

概要

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This paper is concerned with the penetrating force P of Japanese needles, and the shrinking effect of cloths on P of Japanese needles. The results obtained are as follows: (1) The following Eq. (1) is applicable to the penetrating force P of Japanese needles into cloths. [numerical formula] (1) where, a: thickness (mm) of sewn cloths, l: penetrated length (mm) of the pointed head of needle from the upward surface of sewn cloths, θ: a half vertical angle (°) of the needle, k: constant (g/mm^3), which relates to the force resistance of the needle in its penetrating direction. (2) The value of P of shrunk cloths is smaller than that of unshrunk cloths. It results from the decrease of the value of k and al^2 (1-a/l+a^2/3l^2) in Eq. (1) by the shrinking treatment of sewn cloths. (3) Each shear stiffness G, bending rigidity B and coefficient of friction MIU of cloths corresponds well to k. And the values of G, B and MIU of shrunk cloths decrease mostly compared with the ones of unshrunk cloths, this is caused by the falling-off of value of k in Eq. (1) by shrinking of cloths.
社団法人日本家政学会の論文
1990-08-15