PURPOSE: To obtain a fiber, excellent in durability and dimensional stability and useful for rubber reinforcing materials or usual industrial materials by thermally shrinking a fiber drawn at a high temperature and a high draw ratio, coating the resultant fiber with a polyamide-based or a polyurethane-based resin and applying an oil agent having a low friction coefficient thereto.
CONSTITUTION: A fiber drawn at a high temperature and a high draw ratio is thermally shrunk to provide a highly crystalline fiber having a high elongation. A polyamide-based or a polyurethane-based resin in an amount of 0.5-8wt.% is then applied to the fiber surface and an oil agent having ≤0.28 F/F static friction coefficient is subsequently applied to afford a PVA-based fiber having ≥6% yarn elongation and ≤2% dry heat shrinkage factor at 180°C.
YOSHIMOCHI TOSHIMI
NARAMURA SHUNPEI
KOBAYASHI SATORU
