Optical transmission element having a two-layer protective sheat

Details Optical transmission element having a two-layer protective sheat Optical transmission element having a two-layer protective sheat

1991-07-12

1992-08-11

Lee, John D.

Optical waveguides

Optical transmission cable

Loose tube type

385141, G02B 644

Patent

active

051386836

ABSTRACT:
A protective sheath for an optical transmission element is constructed of an inside layer of polycarbonate and an outside layer of a material which has a high degree of crystallization with the crystallization temperature of the outside layer preferably being below the softening temperature of the polycarbonate used for the inside layer so that the heat of crystallization release during crystallization will retard the cooling of the inside layer to produce solidification of the inside layer from the inside of the element toward the outside.

REFERENCES:
patent: 4641916 (1987-02-01), Oestreich et al.
patent: 4660926 (1987-04-01), Mayr et al.
patent: 4664472 (1987-05-01), Mayr et al.

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