By Toshi Takajima
Probably the most attention-grabbing advancements of the previous few many years within the box of fiber creation were the results of extensive learn in eastern and study institutes. This publication was once initially released in jap through the Society of Fiber technology and expertise, Japan, as a way to current an intensive medical and technological overview of advances in fiber construction, and is now released in English. as well as supplying an intensive evaluation of modern breakthroughs in fiber spinning know-how, this well known booklet illustrates how R&D pays
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Additional resources for Advanced Fiber Spinning Technology
Thick and thin yarn. Examples of final products: Blouses, suits. 35 Institute for Chemical Research, Kyoto University, Japan There are a great many subjects covered by the heading 'Fundamentals of spinning'. In this chapter, however, we confine ourselves to a description of the fundamentals of mathematical simulation for spinning and of new findings on structural formation during spinning and fiber structure. This description should be undertaken for each of the three types of spinning: melt spinning, dry spinning and wet spinning.
Such morphology was interpreted by Keller and co_workers24•25 as a structure consisting of folded-chain lamellar crystals grown epitaxially on a long and slender nucleus composed of extended chains. Row structure, however, can readily emerge even from very weakly-oriented melts, and in a thin film of the polymer we can observe many nuclei which are aligned in a line in the rod-like domain. 26 It is, therefore, presumed that the concept of a nucleus composed of extended chains would be a product of too extreme modeling.
1 Poly(p-phenylene terephthalamide) (PPTA) A Kevlar fiber was annealed at 400°C under the condition of constant length, and then fibrillar fragments were obtained by tearing them off from the fiber. The fragments thus prepared were used as specimens for TEM. 10(a) is the dark-field image of the specimen using the 006 meridional reflection, showing a periodic banded texture which consists of alternating bright and dark bands with a period of about 500 nm. Such a banded texture was also observed in longitudinal thin section36,37 and in the fibrillar fragments 38 of PPTA.