Patent ID: 7041385
Filing Date: 2006-05-09
Classification: B23K,Y10T

Abstract:
1. A coiled composite sheet material for brazing, the composite sheet material having a structure comprising a substrate, selected from the group consisting of an aluminium substrate and aluminium alloy substrate, on at least one side coupled to a carrier layer having a thickness of at most 150 μm and comprising a polymer selected from the group consisting of a copolymer of ethylene and methacrylic acid; maleic acid modified polyethylene; and polyethylenevinylacetate copolymer as a carrier filled with a brazing flux material, said brazing flux material comprising at least one member of the group consisting of a fluoride flux and a chloride flux in an amount sufficient to achieve brazing, and the brazing flux material has an average particle size dimension of less than 5 μm and the amount of brazing flux material per side of the composite sheet material is less than 5 gram/m