Kitagawa Industries Co., Inc.

Shogo Nasuda

Akira Ikushima

Kazuya Saito

Takashi Miura

A processing method of a silica glass fiber, which is applicable to a long fiber, to improve its UV resistance by UV irradiation and heat treatment. Initially, a heating furnace is positioned such that the left end of the silica glass fiber is within the heating furnace Then, the heating furnace is moved toward the right, while UV is irradiated with a UV source to the left end surface of the silica glass fiber. Since the silica glass becomes transparent due to removal of structural defects that have been caused by the UV irradiation, the UV travels further forward and causes other structural defects there. When the heating furnace is moved there, the structural defects are removed and the silica glass fiber becomes transparent. By repeating these steps, the fiber is processed throughout length. Thus, mass production becomes possible and an improvement of productivity and lower costs can be achieved.

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Inazawa, Japan

Shogo Nasuda