Method to produce a fabric strip, especially for a screen printing form, and fabric, especially screen printing fabric

• US 6,284,679 B1
• Filed: 03/12/1999
• Issued: 09/04/2001
• Est. Priority Date: 09/13/1996
• Status: Expired due to Fees

• Current Assignee: Sefar AG
• Original Assignee: Sefar AG
• Inventors: Gmür, Hugo, Lehner, Martin, Schilling, Christian
• Primary Examiner(s): Wong, Edna
• Application Number:
  US09/254,835
• Time in Patent Office: 907 Days
• Field of Search: 205/150, 205/159, 205/165, 174/35.MS, 442/131, 442/230, 442/232
• US Class Current: 442/230
• CPC Class Codes: B41N 1/247 Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
• CPC Class Codes: C25D 7/0614 Strips or foils
• CPC Class Codes: Y10T 442/259 Coating or impregnation provides protection from radiation [e.g., U.V., visible light, I.R., micscheme-change-itemave, high energy particle, etc.] or heat retention thru radiation absorption
• CPC Class Codes: Y10T 442/3398 Vapor or sputter deposited metal layer
• CPC Class Codes: Y10T 442/3415 Preformed metallic film or foil or sheet [film or foil or sheet had structural integrity prior to association with the woven fabric]

Abstract

A cloth web is prepared by providing a plastic cloth with a metallic casing layer on both sides thereof by vapor deposition, plasma spraying or cathode sputtering, and then galvanically coating the resultant material with a metal coating.

Claims

1. A process for the production of a cloth web, which comprises:

providing a plastic cloth of mutually crossing plastic cloth strands with a plurality of metallic casing layers on both sides thereof by means of one of vapor deposition, plasma spraying, or cathode sputtering, so that the metallic casing layers have a surface resistance of about 0.2 ohm/2 to 200 ohm/2 and a thickness of between about 5 and 200 nm; and

then galvanically coating the resultant material with a metal coating.

2. A process according to claim 1, including providing said metallic casing layers by said vapor deposition.

3. A process according to claim 1, including providing said metallic casing layers by said cathode sputtering.

4. A process according to claim 1, including providing said metallic casing layers by said plasma spraying.

5. A process according to claim 1, including providing said mutually crossing plastic cloth strands with a metallic casing layer of copper by said vapor deposition, and subsequently galvanically nickel-plating the resultant material, wherein a surface resistance of about 0.5 to 1 ohm/2 is produced in the vapor deposition layer.

6. A process according to claim 1, including providing said mutually crossing plastic cloth strands with a metallic casing layer of steel by said vapor deposition, and subsequently galvanically nickel-plating the resultant material, wherein a surface resistance of about 0.4 ohm/2 to 10 ohm/2 is produced in the vapor deposition layer.

7. A process according to claim 1, wherein said metallic casing layers include at least one of gold, silver, nickel or copper.

8. A process according to claim 7, wherein said at least one of gold, silver, nickel or copper is in the pure form of the metal.

9. A process according to claim 1, wherein the metallic casing layers include at least one of nickel, chromium, steel or aluminum.

10. A process according to claim 1, wherein said metallic casing layers have a thickness of between about 50 nm and 200 nm.

11. A process according to claim 1, including providing said galvanically produced metal coating enclosing the casing layers, with a layer thickness of said galvanically produced metal coating being from about 2 μ

m to about 20 μ

m.

12. A process according to claim 11, including providing nickel as the galvanically produced metal coating.

13. A process according to claim 1 for the production of a cloth web for use as a screen printing form.

14. A cloth web comprising a plastic cloth of intersecting plastic cloth strands provided with a plurality of metallic casing layers on both sides of said plastic cloth by means of one of vapor deposition, plasma spraying or cathode sputtering, with the metallic casing layers having a surface resistance of about 0.2 ohm/2 to 200 ohm/2 and a thickness between about 5 and 200 nm, wherein said metallic casing layers are in turn covered with a galvanically coated metal coating.

15. A cloth according to claim 14, wherein the metallic casing layers contain at least one of gold, silver, nickel, copper, chromium, steel or light metal.

16. A cloth according to claim 14, wherein the thickness of the metallic casing layers are between about 50 and 200 nm.

17. A cloth according to claim 14, wherein the galvanically coated metal coating on the metallic casing layers have a thickness of between about 2 μ

m and 20 μ

m.

18. A cloth according to claim 14 for use as a screen printing form.

19. A cloth according to claim 14 for use as a filter cloth.

20. A cloth according to claim 14 for use for shielding purposes in an electronic sector.