All issues
Successor
Volume 30, Issue 11
Displaying 1-11 of 11 articles from this issue
- |<
- <
- 1
- >
- >|
-
YOICHI UEHARA1974 Volume 30 Issue 11 Pages P379-P386
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (559K) -
RYOSUKE FUJII1974 Volume 30 Issue 11 Pages P387-P390
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (332K) -
SHIGERU SUGA1974 Volume 30 Issue 11 Pages P391-P399
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (2181K) -
YOSHIYUKI NAKAJIMA1974 Volume 30 Issue 11 Pages P400-P407
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (1962K) -
KATSUHIKO KATO1974 Volume 30 Issue 11 Pages P408-P412
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (1053K) -
Kiyoichi Matsumoto, Toru Osumi, Toshiyuki Kuroki, Rikizo Imamura1974 Volume 30 Issue 11 Pages T505-T510
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn the previous paper of this series, the molecular orientation and crystallization of biaxially stretched Nylon-6 films at high temperatures were reported. The present study deals with the changes in mechanical properties of the biaxially stretched Nylon-6 films. The specimens, stretching devices and stretching conditions are same as described in the previous report.
The static mechanical properties of the stretched films such as tensile strength, elongation at break, Young's modulus and F_??_, value were measured at 20°C under 65% R. H. using an Autograph tensile tester. The dynamic properties i.e. the temperature dependencies of tan δ and dynamic modulus E′ as well as dynamic loss E′ were measured at 100Hz using a Viscoelastic Junior Spectrometer.
The following results were obtained;
(1) The mechanical properties of the films uniaxially stretched with free width differ only in the transverse direction in those of constant width. For the machine direction, these properties were found to be similar to general tendency of the change.
(2) The mechanical properties of the simultaneous-biaxially stretched films were same in both directions machine and transverse regardless of their stretch-ratio as observed for other polymer films (e. g. PVC, PP and PET films).
(3) The films stretched by different processes show characteristic changes in dynamic viscoelastic properties due to the changes in degree of orientation and crystallinity. For the biaxially stretched films, the strain which the molecular chain suffers is greater than that of uniaxially stretched ones for the same stretch ratio.View full abstractDownload PDF (451K) -
Chizuko Yatome, Yoshimi Takase1974 Volume 30 Issue 11 Pages T511-T516
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe absorption spectra of complexes of basic dyes with 2-naphthalene sulfonic acid sodium salt were measured in aqueous solution at 5°, 15°, 25°, 35° and 45°C. In dilute solutions, the spectral changes are explained as forming 1:1 complex. The association of such oppositely chareged ions is generally enthalpic, however, that of C. I. Basic Violet 10 with 2-naphthalene sulfonic acid sodium salt is entropic. The association of C. I. Basic Violet 10 may be interpreted by considering the solute-water interaction.
The degree of association is decreased by small amounts of added quarternary ammonium salts in aqueous solutions. The effect of the additives is in the increasing order of Et3NBeCl>Me3NBeCl>Et4NCl>Me4NCl.View full abstractDownload PDF (419K) -
Toshihiko Ogawa, Eiichi Idaka, Yoshiro Yamada1974 Volume 30 Issue 11 Pages T516-T522
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSTo elucidate the culture conditions and the inhibitive mechanism in the biological treatments of basic dyes, the dye concentration, cell concentration and the uptake of oxygen in media were measured in the course of cultures on a reciprocating shaker. The cultures were performed at 30°C by the use of media prepared from peptone, meat extract, glucose and mineral salts. In order to treat effectively the dye solution of about 20 ppm, it was necessary to use media, that were the concentration of 100 times of the BOD in the usual sewerage and were adjusted to pH 7.5. Basic Violet 1 owing to the high biofloculation despite the strong toxicity power induced the decrease ratio of 90% by the culture for 24 hours, while Basic Orange 22 did only about 10% owing to the low biofloculation despite the weak toxicity power. This difference of the biofloculations leaded Basic Violet 1 and Basic Orange 22 respectively to non- and unantagonistic inhibition. By the repeated inoculations in media of the same composition containing a certain dye, lag phases of the growth curves of the microbes became shorter to result from the acclimatization of microbes to the media. When the microbes acclimated to Basic Violet 1 were inoculated to the medium containing the other dye, acclimatization of the microbes was maintained for the basic dyes of a homologous series with Basic Violet 1 that was a triphenylmethane derivatives, but not for the basic dyes of the other series, the acid dyes and the direct dyes.View full abstractDownload PDF (509K) -
Mitsunobu Chino, Megumu Suzuki1974 Volume 30 Issue 11 Pages T523-T530
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSSince the friction between spun yarn and roller is said to be important in textile industries, experimental investigations as to the friction of spun yarn wrapping around a cylinder are done by changing factors of fineness, fiber length, number of twists, yarn counts and yarn tension using a tester of bending frictional force in this paper. It is found that the frictional force of yarn wrapping around a cylinder, namely the bending frictional force increases by decreasing the length of constituent fibers of yarn, and also it has same tendency on the fineness of constituent fibers but decreases with increasing the number of twists per unit yarn length.
Therefore, the bending frictional force increases as the yarn counts are increased and becomes nearly proportional to yarn tension.View full abstractDownload PDF (1261K) -
Tomoko Goto, Juni-chi Kyuwa, Yasuo Yuki, Masamitsu Nagano1974 Volume 30 Issue 11 Pages T530-T536
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe stainless-steel fiber was made by means of the melt-spinning conjugated with the vycor glass. The fiber was obtained by removing the glass by NaOH treatment. The fiber was more than 28 μ in diameter and its tensile strength was 55 kg/mm2 and strain was 20%. The strength of the fiber increased with the decreased diameter of the fiber.
The double layer structure of the fiber was obtained by the scanning electron microscope, i. e. the surface layer was consisted of fine crystal grain and it was observed irregular cellular-structure in the inner layer. It may be considered that these results were due to the difference of the rate of solidification of metal and to the work-effect of glass in texture formation of melt spinning of the stainless-steel fiber conjugated with glass.
The crystal structure of the fiber was consisted of the face-centered cubic lattice and a=3.58 Å. The martensite was not observed. The crystal orientation of the fiber axis was not observed. The density of the crystal plane (111) in perpendicular to fiber axis increased with the decreased diameter of the fiber.View full abstractDownload PDF (3613K) -
Takeo Sone, Takashi Yamazaki1974 Volume 30 Issue 11 Pages T537-T539
Published: November 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSIn the previous study it was shown that sulfated poly (ethylene terephthalate) fiber has good deep dyeing properties for cationic dyes at normal pressure.
In the present study an attempt was made to treat poly (ethylene paraoxybenzoate) (PEB) fiber with sulfuric acid as in the case of PET fiber, in order to give it good dyeing properties with cationic dyes at normal pressure.
The dyeing mechanism of cationic dyes on sulfated fibers was also studied. Cationic dye seems to combine with acid groups which contain sulphur atoms and to a part of carboxyl groups which is made by hydrolysis with sulfuric acid.
The fiber thus prepared has good dyeing properties and fastness to light and washing though the tensile strength of the fiber is not so good as in the case of PET fibers.View full abstractDownload PDF (205K)
- |<
- <
- 1
- >
- >|