Toray Industries, Inc.

Atsushi Shiomi

Kozo Takahashi

Shigeru Aoyama

Isao Manabe

Tomohide Masuda

Ayako Shimazu

A polyester film has a maximum surface height on a surface A side (SRmaxA) of 1500 nm to 7000 nm, a maximum surface height on a surface B side (SRmaxB) of 5 nm or more but less than 7000 nm, the SRmaxA and the SRmaxB satisfying the following relation (1), and a strength at break at 25&#xb0; C. of 200 MPa to 330 MPa in both the longitudinal direction and the width direction.SRmaxA&#x3e;SRmaxB&#x2003;&#x2003;(1)

Polyester film, laminate including the film, and laminated assembly including the laminate and sealant layer

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 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

Atsushi Shiomi