Patent ID: 7094715

Claim:
A non-halogen series floor material, comprising: a first intermediate resin layer containing filler of 100 to 400 mass parts with respect to resin ingredient of 100 mass parts, said resin ingredient consisting essentially of resin having no chlorine atom in chemical structure; a surface resin layer integrally formed at an upper surface side of said first intermediate resin layer, said surface resin layer containing resin having no chlorine atom in chemical structure and having a thickness of 100 to 1,000 μm; a second intermediate resin layer integrally formed at a lower surface side of said first intermediate resin layer, said second lntermediate resin layer containing resin having no chlorine atom in chemical structure and filler of 0 to 200 mass parts with respect to resin ingredient of 100 mass parts; and a backing layer integrally formed at a lower surface side of said second intermediate resin layer, said backing layer being formed of a fibrous fabric constituted by fibers containing resin having no chlorine atom in chemical structure, wherein a content ratio of said filler in said second intermediate resin layer with respect to said resin ingredient of said second intermediate resin layer is smaller than a content ratio of said filler in said first intermediate resin layer with respect to said resin ingredient of said first intermediate resin layer, wherein a thickness of said second intermediate resin layer is 100 μm or more, and wherein a thickness of said second intermediate resin layer is 50% or less of a total thickness of three resin layers of said surface resin layer, said first intermediate resin layer and said second intermediate resin layer, and wherein the following formula is satisfied: 1.0 <x/y≦ 2.0 where “X” is a degree of elasticity of said second intermediate resin layer, and “Y” is a degree of elasticity, of said surface resin layer, whereby edge sides of the floor material are curved downwardly with respect to a central portion of the floor material.