Teijin Limited

Tomoyuki Kishino

Eiji Kinoshita

Kazuteru Kohno

Ryoji Tsukamoto

Tomoyoshi Yamamoto

Nobuo Minobe

Kenichi Ishihara

Minoru Suzuki

Makoto Handa

Ieyasu Kobayashi

Mitsuo Tojo

Tatsuya Ogawa

Hiroki Nagano

Hiroshi Toyao

A biaxially oriented laminated polyester film which has excellent dimensional stability to environmental changes such as temperature and humidity variations and excellent flatness and windability. A biaxially oriented laminated polyester film comprising a film layer B on one side of a film layer A and having a surface roughness (RaB) on the film layer B side which is 1.0 nm or more larger than the surface roughness (RaA) on the film layer A side, wherein at least one of the film layers comprises an aromatic polyester (I) composed of a glycol component and a dicarboxylic acid component containing 5 mol % or more and less than 80 mol % of a recurring unit represented by the following formula (A): wherein Ris an alkylene group having 1 to 10 carbon atoms.

Biaxially oriented laminated film

An object of the present invention is to provide a polyester film having excellent dimensional stability to temperature and humidity. The present invention is a polyester containing a dicarboxylic acid component and a diol component, wherein wherein Ris an alkylene group having 2 to 10 carbon atoms, wherein Ris a phenylene group or naphthalenediyl group; and

Polyester, and composition and film comprising the same

To provide an aromatic polyester which is formed into a film having excellent heat resistance, color, mechanical properties, dimensional stability and gas barrier properties and a manufacturing process thereof; 

Aromatic polyester and manufacturing process thereof

A polyester having a good color tone (a high L value and a low b value) and a low acetaldehyde content is obtained by using a catalyst containing a reaction product of (A) a titanium compound (1) represented by the general formula (I) and/or a titanium compound (2) obtained by reacting the titanium compound (1) of the general formula (I) with an aromatic polyhydric carboxylic acid represented by the general formula (II) or an anhydride thereof, with (B) a phosphorus compound (3) represented by the general formula (III). [wherein R, R, R, Rand R=a C-Calkyl group, k=1 to 3, m=2 to 4, and R=a substituted or non-substituted C-Caryl group or a C-Calkyl group].

Catalyst for preparation of polyester and process for preparing polyester using the catalyst

A poly(ethylene aromatic dicarboxylate ester) resin usable for the production of fibers, films and bottle-formed articles, is produced by polycondensing a diester of an aromatic dicarboxylic acid with ethylene glycol by using a catalyst including a non-reacted mixture or reaction product of a titanium compound component including at least one member selected from titanium alkoxides and reaction products of the titanium alkoxides with aromatic polyvalent carboxylic acids or anhydrides thereof, with a specific phosphorus compound, in which catalyst the contents of titanium and phosphorus elements are controlled.

Process for producing poly(ethylene-aromatic dicarboxylate ester) resin and resin product

The present invention provides a biaxially oriented polyester film made of a polyester containing 0.01 to 5% by weight of crosslinked polymer particles characterized by:

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Matsuyama, Japan

Tomoyuki Kishino