Abrasive filaments and production process thereof
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsTomoo Susa, Seiichi Ohira, Hiroyuki Endo
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Abstract
Abrasive filaments made of a composition which comprises 95-70 vol.% of a polyvinylidene fluoride resin, whose inherent viscosity (.eta..sub.inh) ranges from 0.9 to 1.4, and 5-30 vol.% of abrasive grains. They are produced by melt-spinning the composition and then stretching the resultant filaments at a draw ratio of 2.5 times-5.5 times within a temperature range of 100-200.degree. C.
Claims5
Abrasive filaments made of a composition which comprises 95-70 vol.% of a polyvinylidene fluoride resin, whose inherent viscosity (.eta..sub.inh) ranged from 0.9 to 1.4, and 5-30 vol.% of abrasive grains, wherein the polyvinylidene fluoride resin is a polymer blend composed of a high melting-point polyvinylidene fluoride resin whose melting point (T.sub.m1) ranges from 165.degree. C. to 185.degree. C. and a low melting-point polyvinylidene fluoride resin whose melting point (T.sub.m2) ranges from m125.degree. C. to 170.degree. C., and the melting points (T.sub.m1), (T.sub.m2) satisfy the following equation:
- 50.degree. C..gtoreq.(T.sub.m1 -T.sub.m2).gtoreq.5.degree. C.
Dependencies are inferred from the claim text.