Mitsubishi Rayon Company, Limited

Michisuke Edamatsu

Tsuneo Takano

Katsuhiko Shimada

Yasuo Hiromoto

Tokuo Shinomiya

Syoji Imao

Osamu Itamoto

Sirou Mihara

Yoshihiro Osajima

A method and apparatus for producing a polymer-clad silica (PCS) optical fiber comprising a core of a transparent inorganic glass and a cladding of a transparent organic polymer characterized in that the amount of volatile components in its cladding is not more than 1 wt %, which method and apparatus comprise forming the core fiber, forming the cladding around the core fiber, and treating the cladding with a far infrared heater.

Plastic-clad silica (PCS) fibers and methods and apparatuses for

A process is disclosed whereby porous flakes usable for making paper-like sheets are produced by melting a 10 to 75 parts by weight of thermoplastic polymer, dispersing 25 to 90 parts by weight of finely divided inorganic particles in a solvent capable of dissolving the polymer in an amount of 80 to 95% based on a total weight of the polymer, the inorganic particles and the solvent, at room temperature or lower to prepare a slurry. At a temperature at which the polymer can be dissolved in the solvent, the polymer melt is mixed with the slurry which has been preliminarily heated to a temperature pertinent for realizing the above-mentioned dissolving temperature when the heated slurry is mixed with the polymer melt, to prepare a uniform dispersion of the inorganic particles in the polymer solution in the solvent and then, the dispersion is spurted from a closed tank through an orifice, into a zone having a temperature and pressure lower than that of the dispersion, whereby the spurted dispersion is converted to composite porous flakes by rapidly evaporating the solvent.

Process for continuously producing composite porous flakes

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Otake, Japan

Michisuke Edamatsu