Toray Industries, Inc.

Shigeru Aoyama

Kozo Takahashi

Hiroji Kojima

Yoshihiro Masuda

Jun Sakamoto

Atsushi Shiomi

Akikazu Kikuchi

Tomohide Masuda

Tadamasa Suzuki

Koichi Dan

Takafumi Arike

Shohei Yoshida

Risa Hamasaki

Ayako Shimazu

A multilayer film having a multi-layer structure unit which is a 51-layered or more multiple layer formed by alternately layering a layer (A layer) a main component of which is a polyester resin (resin A) having a dicarboxylic component and a diol component, and a layer (B layer) a main component of which is a thermoplastic resin (resin B) different from the resin A in optical properties; wherein at least one surface of the multi-layer structure unit has a refractive index of 1.68 or more and 1.80 or less, wherein the surface has a critical load of 15 mN or less at 100&#xb0; C. in a scratch test, and wherein the multilayer film has at least one reflection bandwidth having a reflectance of 30% or more continuous over a wavelength width of 20 nm or more in a profile of reflectance measured on at least one surface side of the multi-layer structure unit.

Laminate film

The present invention is a film having at least one reflection band in which the reflectance is 30% or greater continuously in at least a 100-nm range in a wavelength range of 1200-1800 nm when light is incident from at least one side, the mean transmittance in a wavelength range of 430-600 nm is 70% or greater, and the average value of the axial rigidity of the film in the principal orientation axis direction of the film and in the direction orthogonal thereto is 45 N/m or less.

Film and layered body having specified thickness ratios of thermoplastic layers

Provided is a film having excellent electrical insulation performance, heat dissipation performance, and workability. In addition, by using the film, provided are an electrical insulation sheet having excellent heat conductivity, a rotating machine using the sheet, an adhesive tape, and the like. The number of coarse projections SPc (4000) on at least one surface of the film is 15 projections/mmor greater.

Film, and electrical insulation sheet, adhesive tape, rotating machine using same

A polyester composition contains polyester, a phosphoric acid and an alkali metal phosphate, a phosphorous element content P (mol/t) is 1.8 mol/t or more and 5.0 mol/t or less relative to the whole of the polyester composition. The polyester composition contains at least one metal element of Mn and Ca, any divalent metal element content other than Mn and Ca is 5 ppm or less, and when an alkali metal element content relative to the polyester composition is denoted by M1 (mol/t), and a total amount of Mn element content and Ca element content relative to the polyester composition is denoted by M2 (mol/t), a metal element content M (mol/t) in the polyester composition which is calculated by expression (i) below and the phosphorous element content P (mol/t) satisfy expression (ii): (i) M=M1/2+M2 and (ii) 1.1&#x2266;M/P&#x2266;3.0.

Polyester composition and film using same, sheet-like structure, electric insulation sheet, and solar cell back sheet, and manufacturing method therefor

A polyethylene terephthalate composition includes a copolymer component having at least 3 functional groups in an amount of 0.01 mol % to 1.00 mol % with respect to ethylene terephthalate units, in which a ratio (Mw/Mn) between the weight average molecular weight and number average molecular weight of the polyethylene terephthalate composition is 5.0 to 8.0; an alkali metal compound in an amount of 1.0 mol/ton to 3.0 mol/ton in terms of alkali metal element; a phosphorus compound in an amount of 1.5 mol/ton to 5.0 mol/ton in terms of elemental phosphorus; and an o-chlorophenol insoluble matter in an amount of less than 0.5 wt %.

Polyethylene terephthalate composition, manufacturing method therefor, and polyethylene terephthalate film

A polyester film includes particles and two kinds of crystalline polyester resins in which a sea-island structure is formed, wherein, if a crystallization temperature of a crystalline polyester resin A that forms a continuous phase or matrix phase in the polyester film is represented by TccA and a crystallization temperature of a crystalline polyester resin B that forms a dispersion phase or domain phase in the polyester film is represented by TccB, expression (1) below is satisfied, and a degree of flatness of the dispersion phase is 3 or more, and 70% or more of a total number of the particles present in the dispersion phase or are in contact with the dispersion phase:5&#xb0; C.&#x2003;&#x2003;Expression (1).

Polyester film, laminated film, solar battery backsheet and solar battery

A white polyester film has a high level of whiteness, reflectivity, lightness, or thermal dimensional stability, and a surface light source that is produced with the white polyester film and has a high level of brightness characteristics. The white polyester film includes a white polyester layer (W layer) containing a polyester resin component (A) and a component (B) incompatible with the resin component (A) and having voids inside, wherein the incompatible component (B) is a cyclic-olefin resin (b) having a glass transition temperature of 110&#xb0; C. or more, and the content Z of the cyclic-olefin resin (b) in the white polyester layer (W layer) is from 5% by weight to 50% by weight, based on the amount of the white polyester layer (W layer). The surface light source is produced therewith.

White polyester film and surface light source therewith

A polyester film includes a polyester layer (W layer) containing an aromatic polyester resin (A) and a component (B) incompatible with the polyester resin (A), wherein the incompatible component (B) contains an acid-denaturated polyolefin resin (b2) and is dispersed as dispersion pieces with a flatness of 10 or higher in the polyester layer (W layer), and wherein volume occupancy of the dispersion pieces in the polyester layer (W layer) is 3 vol % to less than 50 vol %, and volume occupancy of voids in the polyester layer (W layer) is less than 3 vol %.

Polyester film and a production process thereof, and a surface light source, solar battery backsheet and solar battery respectively obtained by using the same

A polyester film has a laminate structure including a polyester layer (layer P) containing a crystalline polyester and inorganic particles and a polyester layer (layer P) containing a crystalline polyester, inorganic particles, and an antihydrolysis segment, wherein the content (Wa) of the inorganic particles in the layer Pis at least 10 mass % of the layer P, the difference between the content (Wa) (mass %) of the inorganic particles in the layer Pand the content (Wa) (mass %) of the inorganic particles in the layer P, Wa&#x2212;Wa, is 5 to 25 mass %, and the content (Wb) of the antihydrolysis segment in the layer Pis 0.02 to 1.5 mass % of the layer P

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Otsu, Japan

Shigeru Aoyama