| 摘要 |
A coating system for individual glass fibers 12 of a lightwave communications system has improved strippability, particularly in situations where a group of such fibers are arrayed together in what is known as a ribbon 20. A preferred embodiment includes two layers (primary 14 and secondary 15) of polymeric materials surrounding the glass fiber 12. The primary layer 14 comprises an oligomer (50-80% by weight), a diluent (15-40% by weight), and additives (5-35% by weight). The oligomer comprises polyol "A," diisocyanate "B," and a hydroxy-terminated alkyl acrylate "C" having the structure C-BA-B-C. At least one of the additives contains a non-crosslinked hydrocarbon component (1-20% by weight) having a structure R1 - (R)n - R2; where R1, R2 comprises an alkyl group or an OH group, and R is acombination of C, H or C, H, O. In an alternative embodiment, the need for a diluent is substantially eliminated by using an oligomer having the structure E-D-E where "D" represents a carboxy-terminated polyol, and "E" represents a glycidyl acrylate. |
