Optical waveguides – Optical transmission cable
Patent
1997-07-10
1999-06-08
Lee, John D.
Optical waveguides
Optical transmission cable
385141, 525 68, G02B 644
Patent
active
059110236
ABSTRACT:
Optical fiber cable components such as buffer tubes, filler rods, or jackets are produced using a thermoplastic polyolefin characterized by a high melt flow index. The use of material with a high melt flow index versus conventional "extrusion grade" materials which are characterized by a low melt flow index results in substantial improvements in buffer tube crystallinity and crystallization rates, improved buffer tube crush resistance, reduced post extrusion shrinkage, improved gel compatibility, and improved excess fiber length control. The advantages of using materials with a high melt flow index are most evident when processing thermoplastic materials such as nucleated copolymers of ethylene and propylene at high line speeds (shear rates) of over 50M/min.
REFERENCES:
patent: 4832443 (1989-05-01), Cameron et al.
patent: 5385976 (1995-01-01), Furuta et al.
patent: 5561729 (1996-10-01), Parris
patent: 5574816 (1996-11-01), Yang et al.
patent: 5734773 (1998-03-01), Teshima et al.
Holder James D.
Risch Brian G.
Alcatel Alsthom Compagnie Generale d'Electricite
Kang Juliana K.
Lee John D.
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