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US 12,434,455 B2Granted
Multilayer foam sheet and adhesive tape
AssigneeSekisui Chemical Co., Ltd.
InventorsKento Sato, Hiroki Matsukawa, Masahiro Hamada
Life of this patent
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Abstract
Provided is a multilayer foam sheet excellent in flexibility and mechanical strength in the shear direction. A multilayer foam sheet of the present invention is a multilayer foam sheet including: a base layer including a foam layer, and a surface layer including a foam layer or a resin film and laminated on at least one side of the base layer directly or with another layer interposed therebetween, a low-speed shear modulus being 50 MPa or more, and a 25% compressive strength being 125 kPa or less.
Claims12
A multilayer foam sheet comprising:
- a base layer comprising a foam layer;
- and a surface layer comprising a foam layer or a resin film, the surface layer being laminated on each of both sides of the base layer,
- wherein the multilayer foam sheet has a low-speed shear modulus being 50 MPa or more,
- wherein the multilayer foam sheet has a 25% compressive strength being 125 kPa or less,
- wherein, the multilayer foam sheet, a ratio of a thickness of the base layer to a thickness of the surface layer (thickness of base layer/thickness of surface layer) is 4.0 or more, and
- wherein the multilayer foam sheet has a gel fraction from 30 to 80%.
3 more elements
A multilayer foam sheet comprising:
- a base layer comprising a foam layer;
- and a surface layer comprising a foam layer or a resin film, the surface layer being laminated on each of both sides of the base layer,
- wherein the multilayer foam sheet has a 25% compressive strength being 125 kPa or less,
- wherein the multilayer foam sheet has a tensile strength at break being from 10 to 700 N/10 mm,
- wherein, in the multilayer form sheet, a ratio of a thickness of the base layer to a thickness of the surface layer (thickness of base layer/thickness of surface layer) is 4.0 or more, and
- wherein the multilayer form sheet has a gel fraction from 30 to 80%.
3 more elements
Dependencies are inferred from the claim text.