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Volume 19, Issue 2
Displaying 1-3 of 3 articles from this issue
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Kiyoshi Ishii, Tatsuo Takaya, Fumihide Fujimoto1973 Volume 19 Issue 2 Pages 31-34
Published: 1973
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSThe fllammability of Poly-xylyleneadipamide (XDA-6) fiber was investigated by LOI (Limiting Oxygen Index) test, APEX test and 45° Coil test. The flash point and the ignition behavior were also studied by using an electric furmance. LOI value of XDA-6 is a little higher than that of nylon 6 and PET. APEX test shows that XDA-6 fabric is difficult to ignite and burn rapidly except very light weight fabric. It was shown by 45° Coil test that XDA-6 fabric is difficult to continue burning but nylon 6 and PET fabrics are easy to burn.
According to the experimental results of XDA-6 fibers, no ignition point was found below 650°C.
The thermogravimetric behavior of several fibers was studied and discussed in relation to the flammability of these fibers. XDA-6, nylon and PET show two ranges of weight-decreasing temperature while the weight loss in first range of XDA-6 is small compared with the others. The amount of the residue at 600°C were, in order, 17.0% (XDA-6), 8.8% (nylon 66) 3.8% (PET) and 1.5% (nylon 6).View full abstractDownload PDF (397K) -
Hideo Ohe, Katsuyasu Kato, Hiroaki Iida, Syungo Kihara, Hiroshi Shimiz ...1973 Volume 19 Issue 2 Pages 35-44
Published: 1973
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSGeometrical shapes of cross-setions of nylon-6 or polyester false twist textured yarns are classified as those of polysides plus original arcs, those of polysides without arcs, and polygons.
Observing the shapes of the vertical cross-sections cut at equal intervals along a single nylon false twist textured filament, it was found that the filament migrates from outside to inside and vice versa during heat setting.
Nylon and polyester false twisted yarns are relaxed at 120 and 140°C in water or in pressure water containing carrier at 100°C.
The number of sides around the cross-section seems to decrease by relaxation, except nylon of feed ratio of -1.2% and relaxed at 120°C. Single false twisted filaments before and after relaxation were observed with a scanning electron microscope to find the followings: The filament has polysides or polygonal shape at the convex part of the bending, and the original round shape at the concave part.
Filaments which have polysides or polygonal cross-sections have been twisted in straight form, and bent rather abruptly.
Smaller dye penetration length from a round side than from a straight side is observed for a partialy dyed single filament.
Easiness for dye penetration into nylon filament can be ranked as follows: 2.0% feed> ratio>-1.2% feed ratio>yarn before false twisting.
Amount of moisture regain for the corresponding yarns has the same order as above mentioned.View full abstractDownload PDF (1991K) -
Shigeo Kobayashi1973 Volume 19 Issue 2 Pages 45-52
Published: 1973
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSThe handle of textiles is mainly judged by physical stimuli to human hand. So, the subjective assessment of handle is considered as the transmission of information from stimuli to human response. In this paper, the technique of information theory was applied to discuss the measurement of handle. (1) How to classify the characteristic of handle by using symbolic logic method is discussed. (2) How to measure subjective judgement of handle with the transmission of information is discussed. In this case, the information value is expressed as “entropy” which means the degree of uncertainty in information theory. (3) Subjective judgement of handle is calculated as information value for sensory tests on the feeling of textile materials; silk-, wool-, and linen-like touch.View full abstractDownload PDF (886K)
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