繊維の加撚による微結晶配向の変化について

概要

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Twisted a fiber，the twist bands appear on its surface. The angle betweenthe twist bands and the fiber axis is called the twist angle. Generally, the twistangle increases in proportion to the twist number. On the other hand， it canbe seen that the crystallite orientation in the fiber also varies by twisting. Theangle between the fiber axis and the crystal axis is called the spiral angle andit has some distributions around it in the real fiber structure. Generally，thespiral angle in man-made fiber is about O and it has a litt1e distribution around it.In this experiment，the authors tried to know the relation between the variationof twist angle and spiral angle by twisting Tetoron-fish line (2500den.).In order to know the spiral angle，the authors used X-ray method. Generally，(101) plane，(100) plane，(010) plane and (110) plane in Polyethylene Terephtalate(Tetoron) give very c1ear X-ray diffraction. Therefore，the authors tried to measurethe variation of the spiral angle through the variation of these four Xray diffractions.Consequently，it is shown that the spiral angle varies in proportion to thetwist angle for about 50-100 t.p.m. more in the twist number and the simplefiber structure varies to the spiral fiber structure for 400 t.p.m. more.