Gasket formed from various material
A gasket for creating a seal between two surfaces. The gasket may include a pervious base sheet and a permeating material applied to or incorporated into the base sheet. The gasket is formed by various methods disclosed herein. The gasket may include a base sheet, a primary sealing material covering the base sheet, and a secondary sealing material covering the primary sealing material.
1. A gasket having an upper face and a lower face, the gasket comprising:
a base sheet, the base sheet having an upper surface and a lower surface and comprising a pervious material having interstitial spaces therein, the base sheet comprising a mesh material having parallel first elements and transversely extending second elements intersecting the first elements, the interstitial spaces being respectively between the intersecting first and second elements; and
a permeating material at least partially covering the upper and lower surfaces of the base sheet and at least partially filling the interstitial spaces, the permeating material comprising a polymer material and having an upper patterned surface on the upper face of the gasket and a lower patterned surface on the lower face of the gasket, the upper and lower patterned surfaces each comprising intersecting projections and recesses respectively between the intersecting projections, wherein the upper surface and lower surface are partially free from coverage with the permeating material at locations corresponding to the upper and lower recesses.
2. The gasket of claim 1 wherein the upper and lower patterned surfaces comprise substantially all of the surface area of the respective upper face and lower face.
3. The gasket of claim 2 wherein the intersecting projections and recesses comprise a grid pattern on each of the upper face and the lower face.
4. The gasket of claim 1 wherein the intersecting projections on the upper face project away from an upper surface of the first and second elements and the intersecting projections on the lower face project away from a lower surface on the first and second elements.
5. The gasket of claim 1 wherein the permeating material comprises polyacrylate rubber (ACM).
6. The gasket of claim 1 wherein the permeating material comprises fluoroelastomer.
7. A method of forming a gasket having an upper face and a lower face, the method comprising:
providing a base sheet having an upper surface, a lower surface and interstitial spaces, the base sheet comprising a mesh material having parallel first elements and transversely extending second elements intersecting the first elements, the interstitial spaces being respectively between the intersecting first and second elements;
at least partially covering the base sheet with a permeating material and at least partially filling the interstitial spaces,
forming an upper patterned surface on the upper surface of the base sheet; and
forming a lower patterned surface on the lower surface of the base sheet, the upper and lower patterned surfaces each comprising intersecting projections and recesses respectively between the intersecting projections, wherein the upper surface and lower surface are partially free from coverage with the permeating material at locations corresponding to the upper and lower recesses.
8. The method of claim 7 wherein the upper and lower patterned surfaces are formed on substantially all of the surface area of the respective upper face and lower face.
9. The method of claim 7 wherein the intersecting projections and recesses comprises a grid pattern formed on each of the upper face and the lower face.
10. The method of claim 7 wherein covering the base sheet comprises dipping the base sheet in a polymeric coating.
11. The method of claim 7 wherein covering the base sheet comprises spraying the base sheet with a polymeric coating.
12. A gasket comprising:
a base sheet having an upper surface and a lower surface, formed of a mesh material having parallel first elements, transversely extending second elements intersecting the first elements, and the interstitial spaces being respectively between the intersecting first and second elements;
a coating of polymeric material on the upper surface and lower surface of the base sheet at least partially filling the interstitial spaces, the coating being configured in a pattern defined by raised portions forming an upper patterned surface of the upper surface of the gasket and lowered portions forming a lower patterned surface of the lower surface of the gasket, the raised portions comprising intersecting projections forming recesses between the respective raised portions, the lowered portions comprising intersecting projections forming recesses between the respective lowered portions, wherein the upper surface and lower surface are partially free from coverage with the permeating material at locations corresponding to the upper and lower recesses.
13. The gasket of claim 12 wherein the mesh material comprises a screen.
14. The gasket of claim 13 wherein the screen is formed of intersecting metal strands.
15. The gasket of claim 12 wherein the base sheet has first and second faces and the coating is configured in a pattern on at least one of the faces.
16. The gasket of claim 12 wherein the raised portions and lowered portions extend across substantially all of the surface area of the gasket.
17. The gasket of claim 12 comprising:
a wire mesh base sheet having first and second faces;
a coating of polymeric material on the base sheet, the coating being formed into a predetermined pattern on at least one face of the base sheet.
18. The gasket of claim 17 wherein the predetermined pattern extends across substantially all of the surface area of the at least one face.