撚りの構造に関する研究
第4報 撚られた単繊維の収縮力について(続報)
1956 年 12 巻 1 号 p. 24-27
詳細
1956 年 12 巻 1 号 p. 24-27
The difference between the ideal contractive force of a multifilament with circular section and the observed value of corresponding monofilament by twisting at a fixed length may be explained by the fineness of the fiber included in the multifilament.
If the denier of the monofilament is known, the number of corresponding multifilament of various denier of fiber can be calculated by the following formula._??_
where R; Diameter of multifilament equal to the cross section of Amilan or Saran under consideration. r; Diameter of fiber included in these multifilament. n; Number of fiber.
The curve between contractive force at break of these multifilament by twist under a fixed length and their denier of fiber are shown in Figs 4 & 5.
From these curves and observed values, we can estimate the fineness of fiber (Fibrill) for Amilan (890 D); Saran (1146 D) which correspond respectively to 3 d, 18 d.
Especially for Saran, the fineness of fiber 18 d (Fibrill) is ascertained by microscopic observation.
