Shojun Satake

Mitsubishi Group (Japan)

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Masao Ishii

Meteorological Research Institute

Hidenari Suyama

Mitsubishi Group (Japan)

Masataka Kiyota

Mitsubishi Group (Japan)

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Mitsubishi Group (Japan)

Meteorological Research Institute

Japan Meteorological Agency

Institute for Basic Science

Japan Agency for Marine-Earth Science and Technology

Imperial College London

University of Bristol

University of Glasgow

Universidade do Estado do Rio de Janeiro

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

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STUDIES ON THE POLYVINYL ALCOHL FIBERS

Sen i Gakkaishi (1962)

Hidenari Suyama Shojun Satake Masao Ishii Masataka Kiyota

In wet spinning of polyvinyl alcohol fibers, aqueous solutions saturated with salt such as sodium sulfate are usually employd as a coagulation bath. However, sodium sulfate salted out during drying process obstructs the operation such as heat-treatment. As the polyvinyl alcohol fibers, stretched adequately in coagulation bath, become insoluble in water under tension, the effects of washing on the fibers were investigated under the conditions mentioned above. The conclusions were as follows.By washing the stretched fibers under tension, the operations such as drying and heating process became smooth and the strength of the fibers thus removed salt was improved.Conventional wet-spun polyvinyl alcohol fibers microscopically two regions, i.e. the skin and core regions, and show a paler and duller shade as compared with the dry-spun polyvinyl alcohol fibers under same dyeing conditions. Such properties of dyeings seems mainly to be due to the presence of a porous structure of the core in the wet-spun fibers. By stretching the wet-spun fibers at adequate ratio, washing at adequate interval and succeeding drying at high temperature, such fiber structure disappears. The fibers heat-treated and formalized after above treatment show a deeper and brighter shade as compared with conventional wet-spun fibers under same dyeing conditions.

Polyvinyl Alcohol

Synthetic fiber

Salt solution

Sodium sulfate

10.2115/fiber.18.317

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