PURPOSE: To prevent the breakage of foamed cells and to improve more the abrasion resistance of the surface of skin material by a method in which the laminate made of the needle punch unwoven cloth composed of the raw polyester fiber and the film of polypropylene or span-bonded unwoven cloth, is integrally formed by forming a locally pressed welded part.

CONSTITUTION: When skin material 1 is laminated on the PP foamed sheet 7 becoming a base at almost softening point, the PP film 2 of the skin material 1 on a laminated surface (or PP span bonded unwoven cloth) is melted by the hot atmosphere in the softened and molten state of a PP foamed sheet, and then while said melt permeates through the side of polyester needle punch unwoven cloth 3 having been stuck, said film is integrally stuck thereto firmly on its laminated surface, and foamed cells are not broken. Accordingly, the abrasion resistance of the surface 8 of the skin material is remarkably improved by the intersect between each fiber due to the needle punch 5 preliminarily, the locally pressed welded part 6 of the PP film pressure-baried inside by the working of an emboss roll from the surface of the needle punch unwoven cloth 3 and the PP film having permeated through the needle punch unwoven cloth in molten state in the process of lamination.