抄録
The shrinking effects on the mechanical characteristics of the crape cloths were discussed. The results obtained are as follows.
By being treated with the Yunoshi-method of shrinking, (1) Tensile : Young's modulus E of the cloths increases remarkably. And tensile energy AL of the cloths becomes larger, but resilience RE of the cloths remains almost unchanged. (2) Shearing : Shear stiffness G, hysteresis 2HG (at shear angle 0.5°) and hysteresis 2HG5 (at shear angle 5°) of the cloths increase respectively, so the shrunk cloths become difficult to shear and recover from shearing deformation. (3) Bending : Bending rigidity B and hysteresis 2HB of the cloths decrease, so the shrunk cloths become easy to bend and recover from bending deformation. (4) Compression : Compressibility EMC, compressive energy WC and resilience RC of the cloths decrease. This means that the cloths become difficult to compress and to recover just a little from the compressive deformation.
From (1) and (2), as the shrunk cloths are difficult to deform for the tensile and the shearing force, it may be said that the dimensional stability of the cloths makes even better. And from (3), the shrunk cloths become easy to bend and recover from its bending deformation, this shows that the shrunk cloths are endowed with flexibility with soft feeling, and the loosed shape of the cloths become poor in bending deformation of the cloths.
