To certainly fix a filament to a depth part in a safe and simple manufacturing process and improve durability and usage feeling, by fixing the filament with a specific visible-radiation-hardening-type adhesive composition, in a racket string using the synthetic resin made filament.
In a racket string using a synthetic resin made filament, the filament is fixed using a visible-radiation-hardening-type adhesive composition containing a visible-radiation-polimerization starting system composed of combination of dialkylaminobenzylidene derivative as an electron do nor and diphenyl iodonium salt as an electron acceptor. Here, the dialkylaminobenzylidene derivative is selected from a group composed of 2,6-bis(4'-dimetylaminobenzylidene) cyclohexanone, 2,6-bis(4'-dimetylaminobenzylidene) 4-methylcyclohexanone, and their mixture.
KONO KOTARO
ITO BUNICHI
