By using a foam dyeing apparatus, the diffusion of purified disperse dyes in nylon 6 film from the foam phase was studied by means of the cylindrical film-roll method. 1) By the investigation of absorbance curves of disperse dye in the nylon 6 films, it was clarified that disperse dye adsorbed on nylon 6 film was in the same state even if it had diffused under the different dyeing condition. Further, the diffusion of disperse dyes in nylon 6 film was not affected by the difference of the dyeing method, namely the exhaust dyeing or the foam dyeing. 2) In the foam dyeing, the dye concentration at the film-roll surface was larger than that of the exhaust dyeing. 3) Dye concentration at the film-roll surface obtained by the foam dyeing with anionic surfactants were larger than that with nonionic ones, indicating the moderate interaction between disperse dye and anionic surfactant. However, diffusion of disperse dye in nylon 6 film was scarcely affected by the difference of surfactants. 4) Disperse dye was considerably adsorbed on the gas-liquid interface of the foam film, because the dye concentration in the foam film increased with increase of the area of the gas-liquid interface.
In this study, dynamic thread tension during machine sewing (type: 401, 2-thread chain stitch machine) was measured and the infuluence of the tension on the thread consumption and the stretchability of seams was considered. The results obtained were as follows: (1) Three characteristic peaks were observed in each chart of needle and looper thread tension. The looper thread tension tended to be affected by the needle one. (2) The change in setting of needle thread tension caused the difference in the thread balance of the stitch. The stitched seams were classified into two groups whose stitches were balanced and unbalanced ones. It was possible to distinguish these two groups, using the observed peak values of the needle thread tension from the discriminant analysis. (3) A relation between the thread consumption and the tension was obtained by the multiple regression analysis that the dependent and independent variables were MLn-Lnand the peak values of both the dynamic tensions respectively. Where, MLnis the needle thread length per stitch in balanced state without fabric deformation and Lnis nneedle thread length per stitch obtained actually. There was a linear relationship between ML1-L1and MLn-Ln. Where, subscript 1 stands for looper. (4) A linear relationship was observed between the stretch ratio of seams at break and the sum of needle and looper thread lengths per 10mm of seam. (5) It was possible to predict the thread balance of the stitch, thread consumption and stretch ratio at break of seams using the results mentioned above in optional sewing conditions.
The purpose of this investigation was to examine the relationships between‘perceived fashion risk’and risk-reduction methods in purchasing clothing, and to examine the influences of personal factors on these relationships. Undergraduates and their parents served as subjects. They were asked to rate thirty-eight fashion risk items and fourty-five risk-reduction items on a five-point scale, and to rate thirty-seven socio-psychological trait items on either a four-point scale or with a simple‘Yes/No’.The total number of subjects was 698. Major findings obtained were as follows: 1) Five factors of‘perceived fashion risk’and twelve factors of the risk-reduction methods were produced by the method of factor analysis. 2) Major risk-reduction methods for each factor of‘perceived fashion risk’ were as follows: ‘Confirmation of Quality/Performance’and‘Confirmation of Product Life’to remove‘Anxiety about Quality/Performance’; ‘Reduction of Economical Sacrifice’and‘Confirmation of Product Life’to remove‘Anxiety about Deviating from Clothing Norms’; ‘Endorsements by Friends/Models’and‘Confirmation of How to Use’to remove‘Anxiety about Ability to Wear Well and about Fashionability’; ‘Endorsements by Brand/Store Image’to remove‘Anxiety about Fashionability’; ‘Confirmation of How to Use’and‘Endorsements by Family’to remove‘Anxiety about Self-Expression’.3) It was possible to cluster the subjects in terms of the riskreduction strategies, and to characterize each cluster by sex, age, and socio-psychological traits.
Water absorbency of pile fabrics, such as terry fabrics and towelling was studied experimentally with the porous plate method. The initial rate of absorption in the direction perpendicular to a plane of fabric increased with the amount of compressive loading, and changed remarkably below about 15g/cm2. And it was found that the change of initial rate of absorption depends upon the contact area. When allowing the absorption in the direction parallel to a plane of fabric, the initial rate of absorption increased more than that in direction perpendicular and increased by about three times as much as the latter. And it was studied how the initial rate of absorption and saturation absorption relate to fabric structure and some properties. Furthermore the relation between the above mentioned results and that obtaind by strip method was examined.