Gaskets
AssigneeFlexitallic Limited
InventorsJohn Hoyes, Stephen Woolfenden
Life of this patent
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Abstract
The gasket includes a sealing strip comprising a resilient material, the resilient material comprising a chemically exfoliated vermiculite (CEV) component in a proportion of at least 25% w/w of the sealing strip, the said CEV component being at least partially derived from dry CEV, wherein the sealing strip does not include a carrier strip, made by the process of the application of a wet sealing strip material to a forming sheet to form a layer; partially drying the wet sealing strip layer on the forming sheet; removing the layer from the forming sheet; and (d) cutting the layer into strips suitable for use in the formation of a spirally wound gasket.
Claims12
A spirally wound gasket comprising a sealing strip comprising a resilient material, the resilient material comprising a chemically exfoliated vermiculite (CEV) component in a proportion of at least 25% w/w of the sealing strip, the said CEV component being at least partially derived from dry CEV, wherein the sealing strip does not include a carrier strip, made by the process of:
- (a) the application of a wet sealing strip material to a forming sheet to form a layer;
- (b) partially drying the wet sealing strip layer on the forming sheet;
- (c) removing the layer from the forming sheet;
- and
- (d) cutting the layer into strips suitable for use in the formation of a spirally wound gasket.
Dependencies are inferred from the claim text.