Process for the manufacture of polyester industrial yarn

Details Process for the manufacture of polyester industrial yarn Process for the manufacture of polyester industrial yarn

1986-04-01

1989-09-19

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264136, 264171, 26421114, 264DIG26, 264129, D01F 814

Patent

active

048679259

ABSTRACT:
Manufacture of a multifilament polyester yarn which is suitable for use as an industrial yarn, particularly tire yarn, and displays a specific breaking strength at high spinning speeds, the yarn is made in accordance with a process comprising the successive steps of spinning a molten polymer through a plurality of holes, cooling and drawing the resulting filaments, and finally collecting them, the polymer flow in each of the spinneret holes exhibits a core portion having a higher relative viscosity and a sheath portion having a lower relative viscosity, the difference between said relative viscosities amounting to less than 0.100, preferably 0.040-0.003.

REFERENCES:
patent: 3570235 (1971-03-01), Fukuhara et al.
patent: 3595738 (1971-07-01), Clarke et al.
patent: 3963678 (1976-06-01), Conrad et al.
patent: 4134882 (1979-01-01), Frankfort et al.
patent: 4195051 (1980-03-01), Frankfort et al.
patent: 4415726 (1983-11-01), Tanji et al.
patent: 4473617 (1984-09-01), Lemstra et al.

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