Multilayer gasket
AssigneeNolato Silikonteknik AB
InventorsSimon PETTERSSON, Magnus Carlsson
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Abstract
The present disclosure relates to a gasket (100) for electromagnetic shielding, wherein the gasket comprises a first layer (1) and a second layer (2), wherein the electrical resistance of the first layer is lower than the electrical resistance of the second layer, and wherein the permeability of the second layer is higher than the permeability of the first layer. The present disclosure further relates to a method for manufacturing such a gasket.
Claims20
A gasket (100) for electromagnetic shielding, wherein the gasket (100) comprises:
- a) a first gasket layer (1) comprising a composition of a first carrier material (11) and a first kind of conductive particles (12), wherein said first layer (1) has a first electrical resistance value R1 and a first permeability value P1;
- b) a second gasket layer (2) comprising a composition of a second carrier material (21) and a second kind of conductive particles (22), wherein said second layer (2) has a second electrical resistance value R2 and a second permeability value P2;
- wherein R1<R2 and P2>P1 and wherein said first and second carrier materials are, independently of each other, each selected from at least one of silicone rubber and/or thermoset polymers.
A method for manufacturing a gasket for electromagnetic shielding, wherein the method comprises the steps of:
- i) providing a first composition comprising a first viscous material and a first kind of conductive particles;
- ii) providing a second composition comprising a second viscous material and a second kind of conductive particles;
- iii) applying said first composition as a first gasket layer and said second composition as second gasket layer to a substrate, by applying said first composition and said second composition in the form of a multilayer gasket;
- iv) curing the applied compositions, thus forming a multilayer gasket wherein the first gasket layer after curing has a first electrical resistance value R1 and a first permeability value P1, and wherein the second gasket layer after curing has a second electrical resistance value R2 and a second permeability value P2;
- and
- wherein R1<R2 and P2>P1 and wherein said viscous material is silicon rubber and/or thermoset polymer.
Dependencies are inferred from the claim text.