The invention relates to a composite sheet material for brazing, the
composite sheet material having a structure comprising an aluminium or
aluminium alloy substrate on at least one side coupled to a layer
comprising a polyolefin/acrylic acid copolymer as a carrier filled with
brazing flux material, and optionally also with a metal powder, in an
amount sufficient to achieve brazing. The invention further relates to a
method of manufacturing composite sheet material for brazing, which method
comprises the steps (a) mixing the polyolefin/acrylic acid copolymer with
the brazing flux material and/or metal powder, and (b) applying to at
least one surface of the metal substrate a mixture of said copolymer
filled with the brazing flux material and/or metal powder, in an amount
sufficient to achieve subsequent brazing.
