Asahi Kasei Kabushiki Kaisha

Owens Corning Fiberglas Technology, Inc.

Yuuichi Arito

Kenji Takasa

Shinya Hamasaki

Taku Suetomi

Tsumoru Kuwabara

Yusuke Shigemori

Thumoru Kuwabara

A reflecting sheet of the invention is comprised of at least two, a surface layer portion and an inner layer portion, or more layers, and is characterized in that the surface layer portion contains at least a thermoplastic resin (C), the inner layer portion contains a thermoplastic resin (A), and at least one kind of thermoplastic resin (B) incompatible with the thermoplastic resin (A), reflected light intensity in a vertical direction has anisotropy by an incident direction when light is incident at an incident angle of 60 degrees with respect to the vertical direction of a plane of the reflecting sheet in the entire reflecting sheet including the surface layer portion and the inner layer portion, and that a ratio L/L, which is a ratio of reflected light intensity Lin the vertical direction in an incident direction Awhere the reflected light intensity in the vertical direction is the highest to reflected light intensity Lin the vertical direction in an incident direction Aorthogonal to the incident direction A, is 1.2 or more.

Reflecting sheet

A reflecting sheet of the invention includes at least a surface layer portion and an inner layer portion, where the surface layer portion contains at least 0.3 g/mto 20 g/mof an inorganic powder and a polyolefin resin (C), the inner layer portion contains a polyolefin resin (A) and at least one kind of resins (B) incompatible with the polyolefin resin (A) at temperatures enabling stretching of the polyolefin resin(A), the surface layer portion meets (n&#x2212;n)/n&#x2267;0.20 (n: refractive index of the inorganic powder, n: refractive index of the polyolefin resin (C)), and the inner layer portion has voids.

To provide a type of phenol foam characterized by the fact that the phenol foam is formed by using a hydrocarbon as the foaming agent. The phenol foam has excellent heat-insulating performance, high compressive strength and other mechanical strengths, improved brittleness and is friendly to the environment of the earth.

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Tokyo, Japan

Yuuichi Arito