Fuji Photo Film Company, Limited

Fujifilm Corporation

Yukio Shirokura

Fumiyuki Suzuki

Takahito Miyoshi

Tohru Ogura

Takanori Sato

Tadahiro Kegasawa

Tetsuya Yoshida

Masami Okamoto

Hiroko Sugihara

Kousuke Yamaki

Toru Ogura

A cylindrical outer clad section is formed by melt-extrusion molding of polyvinylidene fluoride (PVDF) having a molecular structure in which the number of defect bonds of successive CFunits and successive CHunits constitutes not less than 4% with respect to a total number of bonds of CFunits and CHunits. Next, an inner clad section forming material is poured into a hollow portion of the outer clad section and polymerized to form a cylindrical inner clad section. A core section forming material is filled in a hollow portion of the inner clad section and polymerized to form a core section. Thus, a preform is fabricated. The preform is heat-drawn to obtain a POF. The POF has an outer clad in which small spherocrystals are formed. Average roughness Ra of an inner wall of the outer clad is less than 0.10 &#x3bc;m.

Plastic optical fiber and production method thereof

A clad is produced by polymerizing methyl methacrylate and (meth)acrylic acid ester having alicyclic hydrocarbon group. A core is produced by an interfacial-gel-polymerization method. A first covering layer having a thickness being less than 500 &#x3bc;m is formed on an outer surface of the clad to produce a single-fiber optical cable. A plurality of the single-fiber optical cables are bundled. A gap between the single-fiber optical cables is infused with a filler. The bundled single-fiber optical cables are covered with a second covering layer to produce a multi-fiber optical cable. Since the covering layer is thin, the multi-fiber optical cable has excellent flexibility and reduced bending loss.

Plastic fiber-optic cable and producing method for the same

A polyester resin composition containing a thermoplastic polyester resin; a polyester copolymer containing a monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group; a layered silicate; and an antioxidant. The monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group is contained in the polyester copolymer in an amount of 5 to 15 mol %. The monomer having at least one of an amino group, an imino group, an amido group, and a sulfonic acid group is contained in the polyester resin composition in an amount of 1 to 5 mol % based on a total polyester content of the polyester resin composition. The antioxidant is contained in the polyester resin composition in an amount of 0.01% to 1.0% by mass.

Polyester resin composition

The present invention provides an image-receiving sheet for electrophotography, which is capable of providing an image excellent in gloss and which has an excellent offset resistance during a fixing step at a high temperature. The toner image-receiving layer comprises a polyester resin having the following characteristic properties:

Image-receiving sheet for electrophotography

Biaxial oriented polyester film and method of manufacturing same, photographic substrate, and photographic light-sensitive material

This invention provides a method of producing polyester and charging apparatus therefor capable of producing a high quality polyethylene naphthalate usable for photographic purpose from recovered polyethylene naphthalate which comprises subjecting an ester-forming derivative consisting essentially of naphthalene dicarboxylic acid or its lower alkyl ester and a diol compound consisting essentially of ethylene glycol to ester exchange reaction or esterification to produce polyethylene naphthalate, wherein recovered polyethylene naphthalate resin is charged before beginning of effusion of alcohol or water which is a by-product of the ester exchange reaction or esterification, and a charging apparatus comprising a slidable inner pipe capable of penetrating through a supply valve.

Method of producing polyester and charging apparatus therefor

A photographic film has a width of 35 mm and comprises a continuous support comprising polyester and at least one photographic layer provided thereon. The support has a thickness of 112 to 128 .mu.m. The polyester has recurring units comprising 60 to 85 molar % of ethylene-2,6-naphthalate unit and 15 to 40 molar % of ethylene terephthalate unit and satisfies the formula (1):

Photographic film

Disclosed is a process for the preparation of polyester having an ethylene-terephthalate recurring-unit in the amount of not less than 60 molar % of the total recurring-unit of the polyester by polymerizing a bifunctional carboxylic acid comprising terephthalic acid and glycol comprising ethylene glycol in the presence of an antimony compound, at least one metal compound selected from the group consisting of a glycol-soluble magnesium compound, a glycol-soluble manganese compound and a glycol-soluble zinc compound, a hindered phenol compound, and a sulphur-containing ester compound, wherein the metal compound, the hindered phenol compound and a sulphur-containing ester compound are employed under the following conditions:

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Shizuoka, Japan

Yukio Shirokura