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US 7,321,009 B2Granted
Process for the production of vermiculite foil
AssigneeFlexitallic Investments, Inc.
InventorsJohn Robert Hoyes, Stephen Woolfenden
Life of this patent
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AssigneeFlexitallic Investments, Inc.
InventorsJohn Robert Hoyes, Stephen Woolfenden
Estimating the term…
The invention is concerned with gasket sealing foils having a sealing layer with enhanced properties which is based upon chemically exfoliated vermiculite. The method of producing a sealing foil for gaskets is described. The method comprises the steps of: (a) the application of a wet sealing foil material to a forming sheet to form a layer, (b) partially drying the said wet sealing foil layer on the forming sheet; (c) removing the said layer from the forming sheet to form a core free gasket sealing foil; and (d) forming, preferably cutting, the layer into at least one suitable shape for use in the formation of a gasket The sealing foil comprises a resilient material, which comprises a CEV component in a proportion of at least 25% w/w of the sealing foil, the CEV component being at least partially derived from dry CEV. The sealing foil layer may be combined with a gasket support layer prior to or after the cutting step.
A method of producing a sealing foil for gaskets comprising the steps of:
A sealing foil for a gasket comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived from dry CEV, the sealing foil not including a core carrier material wherein the sealing foil is suitable for forming, preferably cutting, into a suitable shape for use in combination with a gasket support layer.
Use of a sealing foil for a gasket, the said sealing foil comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived from dry CEV, the sealing foil not including a core carrier material, in the manufacture of a gasket.
A method of manufacture of gasket comprising the steps of:
A gasket comprising a sealing foil comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived from dry CEV, wherein the sealing foil has a moisture level of between 3-20% w/w of the sealing foil resilient material during manufacture of the said gasket.
A gasket comprising:
A method of producing a sealing foil for gaskets, the sealing foil comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived from dry CEV, comprising the steps of:
A sealing foil for a gasket comprising a resilient material, the resilient material comprising a CEV component in a proportion of at least 25% w/w of the sealing foil, the said CEV component being at least partially derived, during production of the gasket, from dry CEV, the sealing foil not including a core carrier material wherein the sealing foil is suitable for forming, preferably cutting, into a suitable shape for use in combination with a gasket support layer.
Dependencies are inferred from the claim text.