Core material of string for instruments and string for instrumen

Details Core material of string for instruments and string for instrumen Core material of string for instruments and string for instrumen

1994-02-01

1995-06-27

Gellner, M. L.

Music

Instruments

Stringed

84199, 428364, G10D 300

Patent

active

054270081

ABSTRACT:
Core materials for strings for musical instruments of a twist of two or more multifilaments composed of a vinylidene fluoride resin. The multifilament core has a diameter of 0.1 to 5 mm, an elongation of 10 to 50%, a tensile strength of at least 30 kg/mm.sup.2, a creep elongation of at most 15% and a Young's modulus of at least 200 kg/mm.sup.2. The multifilament is made of monofilaments each having a diameter of 1 to 300 .mu.m, a dispersion diameter of at most 20%/m, a specific gravity of at least 1.6, an inherent viscosity of 0.85 to 1.6 dl/g, an apparent viscosity of 12,000 to 100,000 poise and a birefringence of 30.times.10.sup.-3. Strings for violins, cellos and the like are made by tightly wrapping the core with a metal string.

REFERENCES:
patent: 4382358 (1983-05-01), Tappe et al.
patent: 4833027 (1989-05-01), Ueba et al.

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