Patent ID: 7494686
Filing Date: 2009-02-24
Classification: A61N,B22F,C22C,H01F

Abstract:
1. A process for manufacturing a magnet patch tape, which shows a number of stripes of anisotropic magnet field with 2 to 5 mm width and spaced 1 to 3 mm apart from each other when viewed through a magnetic field viewer, for facilitating blood circulation of a human body in a restricted area is comprised of: prepare a slurry of anisotropic magnetic powder having average particle size of less than 1 μm with a surfactant, and coat a roll of plastic structural layer with protecting layer of LDPE via coating rollers to form a composite film of LDPE/structural layer, and paste a first adhesive of epoxy monomers to the composite film of LDPE/structural layer to form a composite film of epoxy monomer/LDPE/structural layer, and paste slurry of anisotropic magnetic powder on the proceeding composite film of epoxy monomers/LDPE/structural layer via a roller to form a composite film of anisotropic magnet powder/epoxy monomers/LDPE/structural layer, and evaporate the surfactant, and coat the composite film of anisotropic magnet powder/epoxy monomers/LDPE/structural layer with a second adhesives of polyols, and smoothen the surface of the second adhesives by passing through a ridge roller to form a patch tape, and stretch the patch tape with a draw down winder, and expose the patch tape to a magnetizer of 10,000 Gauss and having inside structure of anisotropic magnet blades of thickness of 3 to 5 mm spaced 1 to 3 mm to develop anisotropic magnetic field stripes thereon and to form anisotropic magnet field maintaining patch tape, and cut the anisotropic magnet field maintaining patch tape into a desired size.