By casting aqueous solution of silk fibroin on the glass, nylon6, and nylon66 at room temperature, fibroin films with Silk I crystal forms were obtained with good reproducibility at the examined fibroin concentrations. These casted films were stretched up to 1000% by moistening with water at 30°C for 6 hours. X-ray diffraction study showed that unlike the previous works on Silk I film, the obtained films were still kept Silk I form after 1000% stretching. By using these highly streched films, three reflections with the spacing of 3.75, 2.87, and 2.18_??_ were newly indexed as (121), (042), (211) and (221), respectively.
This is a paper concerned with investigating which points of the drape image are checked by consumers and specialists when they evaluate the sensory value “good drapability” of fabrics. Results obtained are as follows. When consumers and specialists evaluated the drapability about the drape image with node numbers 3 and 4, it was found that the number of points watched by consumers was larger than that by specialists. And specialists evaluated the sensory value “good drapability” after they watched the limited points of the drape image. As the node number of the drape image increased, the number of points watched by consumers increased although the locations of drape image checked by specialists didn't change. This fact may indicate that consumers, who didn't have much experience in evaluating the sensory value “good drapability”, have some sorts of uncertainty about which points of the drape image to be important for the evaluation.
The relaxation behavior of wet-heat-treated fibers of poly(vinyl alcohol) was investigated. The ratio of the length of heat-treated fibers before and after heat-shrinkage occured with boiling the fiber in 20% of ammonium sulfate solution was obtained at various heat-treatment times and temperatures. The plots of heat-treatment time required to obtain a given ratio of shrinkage against reciprocal absolute temperature gave a straight line at various heat-treated temperatures. This result shows that the wet-heat-treatment is explained by the relaxation equation.