Sekisui Chemical Co., Ltd.

Akihito Dohi

Yuji Tanikawa

Kazuyuki Yahara

Masahiro Hamada

Yozo Toei

The closed cell foam sheet of the present invention is a closed cell foam sheet having a thickness of 0.05 to 0.35 mm, wherein the foam sheet has a 25% compressive stress of 30 to 100 kPa, a tensile strength in MD of 3,000 to 15,000 kPa, a tensile strength in TD of 1,800 to 9,800 kPa, and a recovery time of 0.1 seconds or less after the foam sheet is pressed for 5 seconds by 5 N and then released.

Closed cell foam sheet

The foamable composition according to the present invention comprises a copolymer of ethylene, an &#x3b1;-olefin and a non-conjugated diene, a blowing agent, a crosslinking agent, a catalyst and a reaction suppressor, wherein in the foamable composition, the storage elastic modulus at 23&#xb0; C. as measured by a viscoelasticity measuring apparatus is 2&#xd7;10Pa or lower, and the storage elastic modulus after the foamable composition is held at 115&#xb0; C. for 200 seconds is 5&#xd7;10Pa or higher; thereby, a foam body having a low expansion ratio, a low compression strength and a high cushioning property can be produced.

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Saitama, Japan

Akihito Dohi