Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work
Patent
1989-05-19
1990-01-23
Foelak, Morton
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Reshaping running or indefinite-length work
2642902, 524592, 528222, 528226, B29C 5500, C08F28300
Patent
active
048956910
ABSTRACT:
Disclosed herein are poly(arylene thioether-ketone) fibers obtained by melt-spinning a thermoplastic material which comprises 100 parts by weight of a melt-stable poly(arylene thioether-ketone) (PTK) and optionally, up to 50 parts by weight of at least one of thermoplastic resins. The PTK has predominant recurring units of the formula ##STR1## wherein the --CO-- and --S-- are in the para position to each other, and has a melting point, Tm of 310.degree.-380.degree. C., a residual melt crystallization enthalpy, .DELTA.Hmc (420.degree. C./10 min) of at least 10 J/g, a melt crystallization temperature, Tmc (420.degree. C./10 min) of at least 210.degree. C., and a reduced viscosity of 0.3-2 dl/g as determined by viscosity measurement at 25.degree. C. and a polymer concentration of 0.5 g/dl in 98 percent by weight sulfuric acid. The PTK fibers of this invention have high heat resistance and strength.
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patent: 4690972 (1987-09-01), Johnson et al.
patent: 4698415 (1987-10-01), Sinclair et al.
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Indian J. Chem., Vol. 21A, May, 1982, pp. 501-502.
Indian Journal of Pure and Applied Physics, Vol. 22, April, 1984, pp. 247-248.
Mol. Cryst. Liq. Cryst., Vol. 83, 1982, pp. 229-238.
Endo Hiroyuki
Iizuka Yo
Katto Takayuki
Kouyama Toshitaka
Satake Yoshikatsu
Foelak Morton
Kureha Kagaku Kogyo K.K.
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