Mazda Motor Corporation

Nippon Kayaku Kabushiki Kaisha

Ishii Hyoki Co., Ltd.

Ishii Hyoko Co., Ltd.

Takashi Fujii

Takakazu Yamane

Daiji Katsura

Kenta Okada

Sakura Nakano

Takaaki Kurata

Hiroyuki Tsukui

Sakura Nakao

Tsunetoshi Egusa

The content of compound(s) having a molecular weight of 650-670, typically a molecular weight of 660, as measured by mass spectrometry, is reduced to 0.5 mass % or less in a heat-sensitive recording material comprising 3,3'-diallyl-4,4&#x2032;-dihydroxy diphenylsulfone, or in a diphenylsulfone or a color-developing agent. Provided is, thereby, a heat-sensitive recording material, a color-developing agent, or a diphenylsulfone which cause less background fogging under moisture and heat conditions and which has excellent preservation stability of a colored image.

Heat-sensitive recording material and diphenylsulfone

A decorative film structure includes: a surface layer constituted by a transparent or translucent resin layer; a metal luster layer constituted by dots provided on a back surface of the surface layer; and an achromatic layer provided on the back surface of the surface layer to fill a gap between the dots. As surface roughness of a front surface of the surface layer, an Ra is 2 &#x3bc;m or less and either an Rmax is 4 &#x3bc;m or less or a Sm is 50 &#x3bc;m or more. A stimulus value Y45&#xb0; of the metal luster layer is 10000 or more. An area of each dot when viewed from a front side of the surface layer is 10-10&#x3bc;m. A dot area percentage per a unit area when viewed from the front side of the surface layer is 20-99%. A lightness L* of the achromatic layer is 0-80.

Decorative film structure and decorative member

A decorative film structure includes: a surface layer constituted by a transparent or translucent resin layer; an achromatic layer constituted by dots provided on a back surface of the surface layer; and a metal luster layer provided on the back surface of the surface layer to fill a gap between the dots. As surface roughness of a front surface of the surface layer, an Ra is 2 &#x3bc;m or less and either an Rmax is 4 &#x3bc;m or less or a Sm is 50 &#x3bc;m or more. A lightness L* of the achromatic layer is 0-80. An area of each dot when viewed from a front side of the surface layer is 10-10&#x3bc;m. A dot area percentage per a unit area when viewed from the front side of the surface layer is 1-80%. A stimulus value Y45&#xb0; of the metal luster layer is 10000 or more.

Growing community of inventors

Fukuyama, Japan

Takashi Fujii