| 摘要 |
PROBLEM TO BE SOLVED: To enhance shock absorption properties of a floor material, and especially reduce pain when a user presses a body to a floor.SOLUTION: The floor material has a decorative layer 1, a substrate layer 2 and a shock absorption layer 3. In a rear face of the substrate layer 2, rear grooves 20 are formed parallel in a shorter side direction of the rear face and in 0.8-1.6 pieces per a length of 10 mm. |
