Method of producing string of polyamide and stringed rackets and

Details Method of producing string of polyamide and stringed rackets and Method of producing string of polyamide and stringed rackets and

1976-02-10

1977-03-29

Nelms, David C.

Radiant energy

Irradiation of objects or material

Irradiation of semiconductor devices

204156, G21G 500

Patent

active

040151336

ABSTRACT:
String of polyamide is irradiated with dosages of 10.sup.4 to 10.sup.10 rads. It has been discovered by actual experience that in string which is treated in this way the cross linkage of the molecules is enhanced. Such string has higher elasticity and substantially lower damping when set into oscillation than untreated string and that a tennis racket produced with such string is superior to a racket with untreated polyamide string. The dosage is not so high as to cause the string to become brittle.

REFERENCES:
patent: 2257177 (1941-09-01), Luster
patent: 2878174 (1959-03-01), Rainer et al.
patent: 3069283 (1962-12-01), Coleman

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