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US 2012/0164383 A1Published application
Elastomer laminate and method for its production
AssigneeNordenia Technologies GmbH
InventorHenner Sollmann
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Abstract
An elastomer laminate has an elastomer carrier layer composed of a thermoplastic elastomer, and at least one microtextured cover layer composed of a polymer that has a lower elasticity than the material of the carrier layer. The microtexture is produced by stretching the laminate beyond the elasticity limit of the cover layer and elastic recovery of the stretched laminate. The microtextured cover layer contains a plurality of pores.
Claims12
An elastomer laminate comprising:
- an elastomer cover layer composed of a thermoplastic elastomer, and
- at least one cover layer having a microtexture and being composed of a polymer that has a lower elasticity than a material of the carrier layer, said cover layer containing a plurality of pores,
- wherein the microtexture is produced by stretching the laminate beyond an elasticity limit of the cover layer and elastic recovery of the stretched laminate.
A method for the production of an elastomer laminate comprising the following steps:
- producing a coextrudate having a carrier layer composed of a thermoplastic elastomer and at least one cover layer composed of a polymer that has a lower elasticity;
- stretching the coextrudate beyond an elasticity limit of the cover layer;
- and
- subsequently relaxing the coextrudate, in order to produce a microstructure in the cover layer,
- wherein the polymer for the cover layer is mixed with a propellant that expands during melting and extrusion of the polymer and forms pores in the cover layer of the coextrudate.
2 more elements
Dependencies are inferred from the claim text.