Patent GB-970417-A (GB)
Title: Particulate coated sheet material
IPC: B24D11/00
Filed: 1960-10-06
Abstract: An abrasive sheet material comprises a dimensionally stable linear highly crystalline polymono-alpha-olefinic backing, which may be fibrous or non-fibrous, capable of being subjected to temperatures of at least 85 DEG  C. without shrinking or distorting, an adhesive firmly adhered to the backing and a multiplicity of small abrasive particles affixed to the backing by the adhesive. The backing may be of linear highly crystalline polymers, copolymers, or blends thereof, of ethylene, sterro-regulated propylene, butene-1, 3-methyl-butene-1, 4-methyl pentene-1, 4-methyl hexene-1, 5-methyl-hexene-1, 4,4-dimethyl-pentene-1, isoprene and styrene. The backing may be oriented in at least one direction.  The surface of the backing may be primed for adhesion e.g. by corona discharge, with chlorine gas, ozone, nitrous oxide and acid dichromate, prior to the application of adhesive and particles.  The adhesive composition may differ from that of the backing.  The abrasive particles may be, for example, silicon carbide, aluminium oxide, and may be embedded in the adhesive. The adhesive layer may be hardened and may lie over and anchor the particles. The adhesive may comprise chinawood oil varnish, phenolic resin, epoxy resin and polyamide. The back surface of the backing may be coated with pressure-sensitive adhesive or with a non-slip coating of rubber-phenolic resin having cork flour sprinkled thereon.  The sheet material containing abrasive particles may be made up into an endless belt e.g. by adhesion to an endless steel or vulcanized fibre band, or attached to a rigid disc. Specification 557,967 is referred to.ALSO:A sheet material comprises a dimensionally stable linear highly crystalline polymono-alphaolefinic backing, which may be fibrous or non-fibrous, capable of being subjected to temperatures of at least 85  DEG C. without shrinking or distorting, an adhesive firmly adhered to the backing and a multiplicity of small particles affixed to the backing by the adhesive.  The backing may be of linear highly crystalline polymers, copolymers, or blends thereof, of ethylene, stereo-regulated propylene, butene-1, 3-methyl-butene-1,4-methyl pentene-1,4-methyl hexene-1, 5-methyl-hexene-1, 4,4-dimethyl-pentene-1, isoprene and styrene. The backing may be oriented in at least one direction.  The surface of the backing may be primed for adhesion, e.g. by corona discharge, with chlorine gas, ozone, nitrous oxide and acid dichromate, prior to the application of adhesive and particles. The adhesive composition may differ from that of the backing.  The particles may be abrasive, e.g. silicon carbide, aluminium oxide, and may be embedded in the adhesive.  The adhesive layer may be hardened and may lie over and anchor the particles.  The adhesive may comprise chinawood oil varnish, phenolic resin, epoxy resin and polyamide.  The back surface of the backing may be coated with pressure sensitive adhesive or with a non-slip coating of rubber-phenolic resin having cork flour sprinkled thereon.  The sheet material containing abrasive particles may be made up into an endless belt, e.g. by adhesion to an endless steel or vulcanized fibre band, or attached to a rigid disc.  Specification 557,967 is referred to.