초록 ▼

An optical fiber transmission medium (30) ) includes optical fiber (21) provided with a coating system (31) typically including two layers each of a different coating material. An inner layer (32) of a first coating material is called the primary coating and an outer layer is termed the secondary. I

An optical fiber transmission medium (30) ) includes optical fiber (21) provided with a coating system (31) typically including two layers each of a different coating material. An inner layer (32) of a first coating material is called the primary coating and an outer layer is termed the secondary. In order to achieve desired performance characteristics, performance is related to properties of a coating system. The coating materials have well defined moduli and the second coating material has an elongation which is substantially less than in prior secondary coating materials. Adhesion levels which are optimized rather than maximized are substantially stable with respect to time. Curing of the coating materials may be accomplished simultaneously or in tandem with the application separately of the coating materials.

대표청구항 ▼

An optical fiber cable, which comprises: at least one optical fiber comprising a core and a cladding; a coating system which comprises: a first coating material which engages and which encloses substantially the optical fiber, said first coating material being one which is characterized by a modulus

An optical fiber cable, which comprises: at least one optical fiber comprising a core and a cladding; a coating system which comprises: a first coating material which engages and which encloses substantially the optical fiber, said first coating material being one which is characterized by a modulus spectrum and a glass transition temperature which are such as to provide suitable resistance to microbending over a predetermined temperature range, and being characterized by an adhesion to the optical fiber which is substantially uniform and continuous and free from delamination and heterogeneous materials at the interface between the optical fiber and the first coating material, which is optimal to avoid tenacious residues on the optical fiber after the first coating material is removed from the optical fiber and which is substantially constant with respect to time, said modulus spectrum, glass transition temperature and adhesion being substantially maintained under relatively high humidity and relatively long aging conditions; and a second coating material which encloses substantially the first coating material, said second coating material being one which is characterized by a sufficiently low glass transition temperature to avoid delamination of the coating system from the optical fiber and to provide suitable resistance to microbending; and a jacket which is made of a plastic material and which encloses said at least one optical fiber.