Composite material

摘要

A composite material has a polymeric upper layer which is connected via at least one adhesive layer to a substrate. The substrate is predominantly or entirely formed by an open-cell polyurethane foam onto which the upper layer, containing between 2 and 12 wt % of polysiloxane, is bonded by an adhesive layer. An intermediate layer or a double layer, i.e. a composite of the intermediate layer with a bonding layer located between the substrate and the intermediate layer, is provided between the upper layer and the substrate as the adhesive layer for joining the upper layer and the substrate. The regions of the substrate into which the polyurethane dispersion of the adhesive layer has penetrated in a controlled manner during application have a density which is between 12% and 48%, above the density of the regions of the substrate without the adhesive layer.

主权项

1. A composite material, comprising:
a polymer upper layer formed at least partly from a solidified, polyurethane dispersion, said polymer upper layer having an surface structure produced by drying said polyurethane dispersion on a matrix, said polymer upper layer containing between 2 and 12 wt. % of polysiloxane; an adhesive layer; a substrate joined to said polymer upper layer by said adhesive layer, said substrate formed at least partly from an open-cell polyurethane foam, onto which said polymer upper layer, is bonded via said adhesive layer; said adhesive layer containing an intermediate layer, selected from the group consisting of a single intermediate layer and a double layer being a composite of said single intermediate layer with a bonding layer disposed between said substrate and said single intermediate layer, said intermediate layer disposed between said polymer upper layer and said substrate for joining said polymer upper layer to said substrate; at least one of said polymer upper layer, said intermediate layer or said bonding layer being formed by a solidified and cross-linked polyurethane dispersion; and said substrate having first regions into which said solidified and cross-linked polyurethane dispersion of said adhesive layer penetrates in a controlled manner while being deposited have a density that is between 12% and 48% above a density of second regions of said substrate being free of said adhesive layer due to the adhesive layer having penetrated into the first regions thus causing a higher density in the first regions.