Nitto-denko Corporation

Tsunaki Kitahara

Kunio Nagasaki

Kiichiro Matsushita

Yutaka Tosaki

Kazumichi Kato

Kohei Doi

Hideyuki Tokuyama

Tetsuya Otsuka

Mika Okada

Tadao Takahashi

Nurul Janna Binti Abdullah Abdullah

A foamed sheet according to the present invention has a thickness of 30 to 500 &#x3bc;m and includes a foam. The foam has a density of 0.2 to 0.7 g/cm, an average cell diameter of 10 to 150 &#x3bc;m, and a peak top of loss tangent (tan &#x3b4;) occurring in a temperature range of from &#x2212;30&#xb0; C. to 30&#xb0; C., where the loss tangent is defined as the ratio of a loss modulus to a storage modulus determined at an angular frequency of 1 rad/s in dynamic viscoelastic measurement of the foam. The foam preferably has a maximum of the loss tangent (tan &#x3b4;) in the temperature range of from &#x2212;30&#xb0; C. to 30&#xb0; C. of 0.2 or more.

Foamed sheet

Growing community of inventors

Ibaraki, Japan

Tsunaki Kitahara