Patent ID: 8906486
Filing Date: 2014-12-09
Classification: B26D,B26F,E04B,E04F,Y10T

Abstract:
1. A flexible polymer sheet material or tensioned false ceilings or false walls, said sheet having a thickness of less than half a millimeter, wherein microprojections having a height of 100 um or less are formed in the sheet material, said microprojections being formed by displacing the material from which the sheet is made, each microprojection comprising a through hole presenting a visible opening of the order of two-tenths of a millimeter, said microprojections being formed by needling and extending in a direction substantially perpendicular to the plane of said sheet, the needling being performed while the sheet of material is placed under tension, said tension being of the same order as that which the sheet is subjected in use in a tensioned false ceiling, the material being selected from the group consisting of plastified polyvinyl chlorides, viniylidene chlorides, and copolymers of vinyl chloride and vindlidene chloride.