A laminated polyester film which comprises a base polyester film and, formed on at least one surface thereof, a laminating membrane comprising two types of polyester resin, wherein said two types of polyester resin are a polyester resin (A) having a glass transition temperature of 60 ° C to 100 ° C and a polyester resin (B) having a glass transition temperature of 0 ° C to 60 ° C, the polyester resin (B) contains specific components in specific amounts, and the polyester resins (A) and (B) exhibit specific proportions of the amount of a sulfonate metal salt group-containing dicarboxylic acid component in the total amount of a dicarboxylic acid component The laminated polyester film retains excellent characteristics inherent in the base polyester film and also exhibits satisfactory adhesion with various coatings, which has not been achieved by a conventional polyester film, and further has satisfactory anti-blocking property, transparency, scratch resistance and the like

Laminated polyester film

Disclosed are a photosensitive resin composition including a composite dye that includes a red fluorescent dye re-emitting light at a 400 to 800 nm fluorescent wavelength; and a metal complex dye including at least one metal ion selected from Mg, Ni, Co, Zn, Cr, Pt, and Pd, and a color filter using the same.

Photosensitive resin composition and color filter using the same

The present invention provides a polyester film which is excellent in hydrolysis resistance of a base film, is hardly deteriorated in adhesion property to various members or top-coating agents, and can suitably used, for example, as a film for a protective member for protecting a back surface of solar cells. The present invention relates to a biaxially oriented polyester film in the form of a laminated film comprising a biaxially oriented polyester base film having a phosphorus element content of 0 to 170 ppm and a terminal carboxylic acid content of not more than 26 equivalents/t, and a coating layer formed on at least one surface of the biaxially oriented polyester base film which comprises a polyurethane having a polycarbonate skeleton or a polyether skeleton and a crosslinking agent, wherein the laminated film has a haze value of not more than 10%.

Biaxially oriented polyester film

The present invention relates to a process for
producing a polyester sheet comprising 
   using a vent-type twin-screw extruder, 
   using a polyester resin having not lower than 1 X 10 -7 
Ω cm of a specific resistance when melted as starting
material, 
   supplying said polyester and a metal salt of an
aliphatic monocarboxylic acid or dicarboxylic acid in amount
of 0.5 to 1,000 ppm, calculated as metallic atom, based on
the polyester resin, and 
   closely adhering the molten polyester sheet extruded
onto a rotating chilling drum from the extruder to the
surface of said chilling drum by use of an electrostatic
pinning technique.

Process for producing polyester composition

PROBLEM TO BE SOLVED: To provide a polyester resin having both high refractive index and low birefringent properties. SOLUTION: The polyester resin includes a dicarboxylic acid component and a diol component as polymerizable components, wherein the dicarboxylic acid component is a dicarboxylic acid component containing an asymmetric monocyclic aromatic dicarboxylic acid component (e.g. an isophthalic acid dicarboxylic acid component) as a main component (e.g. in an amount of more than 50 mol% of the whole dicarboxylic acid components), and the diol component comprises a compound having a 9,9-bis(hydroxy(poly)alkoxyaryl)fluorene skeleton. The diol component may comprise a compound having a 9,9-bis(hydroxy(poly)alkoxyaryl)fluorene skeleton, and an aliphatic diol component. COPYRIGHT: (C)2011,JPO&INPIT

Polyester resin having fluorene skeleton

PROBLEM TO BE SOLVED: To provide a polyester film excellent in wet heat resistance and thermal dimensional stability, a solar cell back sheet, and a solar cell.SOLUTION: A method for producing the polyester film which is produced by the following processes (1)-(3). In a biaxially stretching process (1), a film is biaxially stretched at least 13.5 times in area magnification in the longitudinal direction (MD) and the width direction (TD) of the film at a temperature T1n satisfying formula (a): Tg≤T1n≤Tg+40°C (Tg: the glass transition temperature of the film (°C)). In the first heat treatment process (2), both ends in the width direction of the film are gripped while the dislocation in the gravity direction of the central part of the film is ≥1 and ≤50 mm to a straight line connecting both ends in the width direction of the film, and heat treatment is executed at a heat treatment temperature Th1 satisfying formula (b): Tm-90°C≤Th1≤Tm-45°C [Tm: the melting point of the film (°C)]. In the second heat treatment process (3), MD and TD are contracted 1-10% under the condition of a heat treatment temperature Th2 satisfying formula (c): 150°C≤Th2≤Th1.

Polyester film and solar cell using the same

Disclosed is a retardation film using a polyester having a photoelastic coefficient of from -40 × 10-12 Pa-1 to 40 × 10-12 Pa-1. Also disclosed is a polyester resin for optical use which contains a phosphorus compound while having an alicyclic component and a fluorene derivative component as constitutional units. This polyester resin for optical use satisfies the following formulae (6) and (7). 100˚C ≤ glass transition temperature ≤ 150˚C (6) 1.0 ≤ (Ma/2 + Mb + Mc)/P ≤ 5.0 (7) (In the formulae, Ma represents the mole number of alkali metal elements contained in 1 ton of the polyester resin; Mb represents the mole number of alkaline earth metal elements contained in 1 ton of the polyester resin; Mc represents the sum of respective mole numbers of Zn, Co and Mn metal elements contained in 1 ton of the polyester resin; and P represents the mole number of phosphorus element contained in 1 ton of the polyester resin.)

Retardation film and polyester resin for optical use

PROBLEM TO BE SOLVED: To provide a polyethylene terephthalate composition good in polymerization reactivity and hydrolysis resistance. SOLUTION: The polyethylene terephthalate composition comprises a polyethylene terephthalate containing 0.1-5.0 moL/t of a buffering agent, wherein the polyethylene terephthalate is such as to be ≤20 eq/t in the number of terminal carboxyl groups, 0.6-1.0 in intrinsic viscosity, 0.1-10 moL/t in alkali metal content, and ≤0.01 wt.% in deposits amount attributable to catalyst residues. COPYRIGHT: (C)2008,JPO&INPIT

Polyethylene terephthalate composition and method for producing the same and film thereof

A method for the production of a polyester resin composition by conducting polycondensation via esterification or transesterification, wherein an alkali metal phosphate in an amount of 1.3 mol/ton to 3.0 mol/ton and phosphoric acid in an amount of 0.4 to 1.5 times (by mole) that of the alkali metal phosphate are added at a stage between the point of time when the esterification or transesterification has been substantially completed and the point of time when the intrinsic viscosity reaches 0.4. A polyester resin composition obtained by the process exhibits excellent long-term hydrolysis resistance and excellent mechanical characteristics.

Polyester resin composition, process for production of same, and film

A practical polyester which is provided with substantially no antimony compound as a polycondensation catalyst. (I) One of the polyester resin compositions has an antimony content of 30 ppm by weight or lower, a titanium content of 0.5 to 50 ppm by weight, and a phosphorus content of 0.1 to 100 ppm by weight and has titanium-containing particles having a diameter of 1 µm or larger in terms of equivalent-circle diameter, the number of the particles being less than 100 per 0.02 mg. (II) The other polyester resin composition has an antimony content of 30 ppm by weight or lower, a titanium content of 0.5 to 50 ppm by weight, and a phosphorus content of 0.1 to 100 ppm by weight and contains 0.1 to 5 wt.% organic polymer particles which have an average particle diameter as measured by the dynamic light scattering method of 0.05 to 3 µm and in which the number of coarse particles having a particle diameter at least two times the average particle diameter account for up to 0.01% of the number of all particles.

Jun Sakamoto

Papers

Polyester film and solar cell using the same

Retardation film and polyester resin for optical use

Polyethylene terephthalate composition and method for producing the same and film thereof

Polyester resin composition, process for production of same, and film

Polyester resin compositions, catalyst for polyester production, polyester film, and magnetic recording medium