Abstract
In order to develop silk fishing lines, silk material yarns covered with photo-curing resins were produced. First of all, the manufacturing methods for processing, the structure of the silk material yarns, etc, were inverstigated. In the manufacturing process a running yarn adhereing to photo-curing resins passed through a pipet fine tube with a suitable hole size, the surplus resin was discharged in the tube, and a running yarn appearing like a mono-filament line was formed by applying ultraviolet rays for the hardening of the photo-curing resins.
The apparatus constructed empirically consisted of a vessel containing the photo-curing resin, a pipet fine tube, a suction tube, a suction pump, a plating board with an appropriate hole size, a button to guide the filament, a few mercury lamps for the emission of ultraviolet rays.
The results obtained were as follows. Hardening of photo-curing resins on a running yarn was affected by the emission of ultraviolet rays and by heat drying. The use of light single twisted yarns was preferable to that of hard double twisted ones. Undegummed silk material yarns were more suitable for the production of a mono-filament line with a smooth touch than degummed ones.
