| 摘要 |
PURPOSE:To enhance light transmission efficiency, by using prescribed resins for a core component and a sheath component, highly purifying the sheath component through a specified method, and improving molecular structural compatibility between the core and the clad. CONSTITUTION:The plastic optical fiber consists of a methyl methacrylate polymer as a core material and a copolymer of methacrylate and fluorinated methacrylate as a sheath component. Dust contained in the monomers of the sheath component are controlled to <=100 particles per 1mm.<3>, and they are block copolymerized in the absence of oxygen in a closed system at <=100 deg.C polymn. temp. so as to produce a copolymer contg. 5-50wt% methacrylate component, and <=0.5wt% remaining monomers, and having 50,000-150,000 weight average mol.wt. Optional methacrylate can be selected in accordance with intended physical properties, such as heat resistance strength, or light transmission efficiency, but methyl methacrylate is the most desirable from the view point of the molecular structural compatibility. |
