Sealing material

• US 20070190871A1
• Filed: 10/12/2005
• Published: 08/16/2007
• Est. Priority Date: 05/07/2004
• Status: Abandoned Application

• Current Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Original Assignee: W. L. Gore & Associates (W.L. Gore & Associates)
• Inventors: Hanrahan, James, Patel, Malay, Napolitano, Michael
• Application Number:
  US11/250,121
• Publication Number:
  US 20070190871A1
• Time in Patent Office: Days
• US Class Current: 442/43
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2260/021 Fibrous or filamentary layer layers of natural mineral fibres or particles being impregnated in a plastic substance B32B19/02
• CPC Class Codes: B32B 2260/048 Natural or synthetic rubber
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres vinyl or acrylic copolymers B32B2262/0223 or B32B2262/0246
• CPC Class Codes: B32B 2262/103 Metal fibres
• CPC Class Codes: B32B 2264/0257 Polyolefin particles, e.g. polyethylene or polypropylene homopolymers or ethylene-propylene copolymers
• CPC Class Codes: B32B 2307/308 Heat stability dimensional stability B32B2307/734
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/7145 Rot proof, resistant to bacteria, mildew, mould, fungi
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/73 Hydrophobic
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2405/00 Adhesive articles, e.g. adhesive tapes labels B32B2519/00
• CPC Class Codes: B32B 25/02 with fibres or particles being present as additives in the layer
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 25/18 comprising butyl or halobutyl rubber
• CPC Class Codes: B32B 2581/00 Seals; Sealing equipment; Gaskets
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 5/02 : characterised by structural features of a fibrous or filamentary layer layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02
• CPC Class Codes: B32B 5/16 : characterised by features of a layer formed of particles, e.g. chips, powder or granules layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09J 2301/122 : the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
• CPC Class Codes: C09J 2301/312 : parameters being the characterizing feature
• CPC Class Codes: C09J 2400/263 : in the substrate
• CPC Class Codes: C09J 2421/00 : Presence of unspecified rubber
• CPC Class Codes: C09J 2427/006 : in the substrate
• CPC Class Codes: Y10T 442/164 : Including a preformed film, foil, or sheet
• CPC Class Codes: Y10T 442/167 : Fluorinated polyolefin film or sheet
• CPC Class Codes: Y10T 442/172 : Coated or impregnated
• CPC Class Codes: Y10T 442/198 : Coated or impregnated

Abstract

A sealing material is presented which can be applied to surfaces and/or surfaces having seams, cracks, crevices and the like to hinder growth and colonization of bacteria while maintaining adhesion over a wide range of service, or use, conditions. The sealing material includes a fluoropolymer layer and a rubber based adhesive layer which is capable of adhering the sealing material to the surface or surfaces to be sealed. The invention combines the inherent anti-stick and hydrophobic properties of fluoropolymers with excellent adhesive characteristics of the rubber based adhesive.

Claims

1. A layered article comprising

a fluoropolymer layer having a surface energy of 25 dynes/cm or less, a water contact angle of 100°

or greater, and which is substantially free of pores; and

a rubber based adhesive bonded to said fluoropolymer layer,

said article having a hardness of 60 (Shore D) or less.

2. The article of claim 1, wherein said adhesive comprises butyl rubber.

3. The article of claim 1, wherein said adhesive further comprises at least one reinforcement.

4. The article of claim 3, wherein said reinforcement comprises a mesh.

5. The article of claim 1 in the form of a tape.

7. A layered article comprising:

a layer of polytetrafluoroethylene having a bulk polytetrafluoroethylene density of 2.11 g/cc or more; and

a rubber based adhesive bonded to said fluoropolymer layer,

said article having a hardness of 60 (Shore D) or less.

8. The article of claim 7, wherein said adhesive comprises butyl rubber.

9. The article of claim 7, wherein said adhesive further comprises at least one reinforcement.

10. The article of claim 7, wherein said reinforcement comprises a mesh.

11. The article of claim 7 in the form of a tape.