Abstract: The invention concerns an elastomer composition for a self-supporting insert (1) intended to support a tyre of a wheel of a vehicle, an insert of which at least one layer (3) comprises said composition and a mounted assembly incorporating said insert. The invention applies to a non-pneumatic mounted assembly, in particular for a vehicle with two wheels, in which each of the tyres is permanently supported by said insert, The elastomer composition comprises, principally by mass, a mixture of at least one first thermoplastic elastomer and at least one second thermoplastic elastomer, and said composition is such that said at least one first thermoplastic elastomer is a copolyamide (COPA) and said at least one second thermoplastic elastomer is a thermoplastic styrene (TPS) elastomer.

Abstract: The invention relates to a cellular substance, the method of preparation and uses thereof, in particular as an absorbent substance, and in particular for the manufacture of sponges and other products for household use. The cellular substance of the invention comprises a mixture of fibers of a hydrophilic polymer, and at least one elastomer, and has a cellular structure formed by cells whose size is between 0.2 ?m and 10 mm, at least 1% of the cells, by volume as compared to the total cell volume, having a size of between 0.2 ?m and 10 ?m. The invention has application, particularly, in the area of absorbent products.