Multi-layer security mat for playground surface

Details Multi-layer security mat for playground surface Multi-layer security mat for playground surface

E - Fixed Constructions

01

C

E01C 13/08 (2006.01) B32B 27/32 (2006.01) B32B 27/40 (2006.01) E01C 13/06 (2006.01)

Patent

CA 2432204

The present invention relates to a multi-layer security mat for covering a playground surface, comprising a top abrasion layer, an intermediate charge-distributing layer and a bottom shock-absorbing layer. The intermediate charge-distributing layer is interposed between the top abrasion layer and the bottom shock-absorbing layer for distributing charges applied to the top surface of the top abrasion layer on the bottom shock-absorbing layer. The bottom layer absorbs shocks applied to the top surface of the top abrasion layer. The top abrasion layer, the intermediate charge-distributing layer, and the bottom shock-absorbing layer increase in thickness while they reduce in density. To manufacture the multi-layer security mat, a prefabricated panel of expanded polypropylene is disposed generally horizontally to form the bottom shock-absorbing layer. A first mixture of (a) granules of rubber material and (b) polyurethane is poured on the top surface of the prefabricated panel of expanded polypropylene and, then, is cured to form the intermediate charge-distributing layer. A second mixture of (a) granules of rubber material and (b) polyurethane is finally poured on the top surface of the intermediate charge-distributing layer and then cured to form the top abrasion layer.

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