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Volume 44, Issue 3
Displaying 1-8 of 8 articles from this issue
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Dongping Hua, Kazuhisa Harakawa, Yuji Kon1991 Volume 44 Issue 3 Pages T47-T55
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSA method for analysing the structure of two layered spun yarn is proposed. In this method, structure variation is analyzed by using the cumulative curve of helical path differences (L (n)). L (n) contains two different kinds of components; one has relatively long wave length and the other has relatively short one. We consider that the former is 'trend' and that the latter shows the yarn structure change (migration) which is caused by variation of mutual dynamic balance of fibers.
The variation component with relatively short wave length, named 'HPD', is, derived by removing 'trend' which is calculated by the 5th polynominal regression. Measurement is done about two layered yarns made of polyester staples of 2.0 denier 51 mm in length. Experimental results indicates that ΔHPD, which is the difference of HPD from the beginning of increase or decrease to the end of it, shows almost the same distribution with average 12.4μm, while the trend characterisfically shows the difference of the spinning direction.
It is concluded experimentally that migration occurs when helical path difference becomes about 12.4μm, which is independent of spinnirig direction.View full abstractDownload PDF (911K) -
Yasuharu Fujiwara, Yasuko Tokoro, Nobuko Kondoh1991 Volume 44 Issue 3 Pages T56-T62
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSA comparison of perceptions for textile fibers of womens' college students and textile technical experts was made. The similarity ratings of 10 textile fibers were subjected to a multidimensional scaling analysis ; two dimensions provided the most appropriate solution for the students' data, three dimensions for the textile technical experts' data.
Plot of the fibers in the dimensional configurations indicated that three clusters ; (Wool, Acrylic), (Nylon, Vinylon, Polyester, Rayon, Acetate), (Cotton, Flax, Silk) were differentiated by the dimensions in case of the students, while four clusters ; (Wool, Acrylic), (Flax, Cotton, Vinylon), (Rayon, Acetate), (Polyester, Silk, Nylon) in case of textile technical experts.
From the locations of the fibers in the dimensional space and the projections of perceived fiber properties on the space, the students' two dimensions were interpreted as natural versus chemical fibers, warm versus cool fibers, the experts' three dimensions were did as cellulosic versus noncellulosic fibers, staple versus filament fibers, strong versus weak fibers in mechanical properties.View full abstractDownload PDF (892K) -
Toyonori Nishimatsu1991 Volume 44 Issue 3 Pages T63-T68
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSThe image processing system to predict three-dimensional drape image from the two-dimensional drape photo image was constructed on a basis of the three-dimensional drape images seen from different angles by using this experimental system and these predicted drape images were compared with the drape images observed at different angles.
The results obtained are as follows ;
Using the revised height coefficient (k=5), three-dimensional drape image seen from different angles were computed by the smooth-shading method. The predicted drape images were different from the measured drape images at the salient feature and the re-entrant feature of the drape images.
So the revised height coefficient (kb =kr=km=1) of the suspected colored parts (blue, red and madder red) was given the smaller value than the revised coefficient (kg=ka=ky=5) of the suspected colored parts (green, azure and yellow). And using these coefficients, three-dimensional drape imagem seen from different angles were predicted from the two-dimensional drape image by the smooth-shading method. As the result, there was a good agreement between the predicted three-dimensional drape images and the measured three-dimensional drape images.View full abstractDownload PDF (4720K) -
T. Harada, H. Yorifuji1991 Volume 44 Issue 3 Pages P110-P118
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (2408K) -
H. Minami1991 Volume 44 Issue 3 Pages P119-P126
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (11129K) -
Y. Iwasaki1991 Volume 44 Issue 3 Pages P127-P132
Published: March 25, 1991
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSDownload PDF (1509K) -
A. Ueta1991 Volume 44 Issue 3 Pages P133-P143
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (2292K) -
Y. Miura1991 Volume 44 Issue 3 Pages P144-P155
Published: March 25, 1991
Released on J-STAGE: October 27, 2009
JOURNAL FREE ACCESSDownload PDF (1440K)
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