Composite with direct bonding between rubber and foam

A composite comprising the following components:

• (a) a rubber layer comprising a cured rubber that is formed from a composition comprising the rubber and a first copolymer having carboxyl groups wherein the carboxyl groups in the first copolymer are present in an amount of about 0.05 to about 1 weight % based on the total weight of the rubber layer, and wherein the first copolymer having carboxyl groups is a copolymer selected from the group consisting of ethylene-maleic acid monoethyl ester copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, and mixtures thereof;
• and
• (b) a foam layer comprising a crosslinked ethylene vinyl acetate that is formed from a composition comprising the ethylene vinyl acetate and a second copolymer having glycidyl methacrylate groups, wherein the glycidyl methacrylate groups in the second copolymer are present in an amount of about 0.15 to about 3 weight % based on the total weight of the foam layer, wherein the second copolymer having glycidyl methacrylate groups is a copolymer selected from the group consisting of ethylene-glycidyl methacrylate copolymer, ethylene-vinyl acetate- glycidyl methacrylate copolymer, ethylene-butyl acrylate-glycidyl methacrylate copolymer, and mixtures thereof, and wherein the foam layer is free of the first copolymer having the carboxyl groups;
• wherein the foam layer has at least one surface adhering to the rubber layer directly, and
• wherein the composite is free of glues or adhesive films in the interface between the rubber layer and the foam layer.