Sumitomo Electric Industries, Limited

Kentaro Takeda

Ken Takahashi

Fumiaki Sato

Taro Fujita

Makoto Itoh

Ryoei Oka

Deva Omalka Vayanthi Suduwa

Ken Manabe

Takao Hirama

Reo Amano

An optical-fiber ribbon includes a plurality of optical-fibers, and a common covering layer. There are formed a plurality of intermittent connection portions in which a first connection portion that is formed from the common covering layer and a non-connection portion are alternately formed between the optical-fibers. There are formed a plurality of continuous connection portions in which a second connection portion that is formed from the common covering layer is continuously formed between optical-fibers. The intermittent connection portions include a central intermittent connection portion at a central portion of the optical-fiber ribbon in a width direction. The continuous connection portions include adjacent continuous connection portions. A thickness of adjacent continuous connection portion is larger than a thickness of the central intermittent connection portion and is larger than a thickness of the continuous connection portion other than the adjacent continuous connection portions.

Optical-fiber ribbon, die, and method of manufacturing optical-fiber ribbon

Provided is a polyethylene resin for use in a spacer for an optical fiber cable, the polyethylene resin having a density of 0.952 g/cmor more, containing a polyethylene having a molecular weight of 10,000 or less in a weight fraction of 22% or more, and containing a polyethylene having a molecular weight of 300,000 or more in a weight fraction of 12% or more.

Polyethylene resin for use in spacer for optical fiber cable and spacer for optical fiber cable using the same

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Yokohama, Japan

Kentaro Takeda