Impermeable laminate membrane

• US 4,413,359 A
• Filed: 02/26/1982
• Issued: 11/08/1983
• Est. Priority Date: 03/04/1981
• Status: Expired due to Fees

• Current Assignee: Koken Limited
• Original Assignee: Koken Limited
• Inventors: Wada, Fumio, Akiyama, Taichiro
• Primary Examiner(s): Robinson, Ellis P.
• Application Number:
  US06/352,528
• Time in Patent Office: 620 Days
• Field of Search: 428/421, 428/422, 428/447, 428/35, 206/438, 229/55, 128/1 R, 128/DIG. 14, 128/DIG. 21, 3/1, 3/36, 525/937
• US Class Current: 623/23.72
• CPC Class Codes: A61F 2/00 Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents as cosmetic articles, see the relevant subclasses, e.g. wigs, hair pieces, A41G3/00, A41G5/00; artificial nails A45D31/00; dental prostheses A61C13/00; materials for prostheses A61L27/00; artificial hearts A61M60/00; artificial kidneys A61M1/14
• CPC Class Codes: A61F 2/12 Mammary prostheses and implants
• CPC Class Codes: A61L 27/16 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: Y10S 128/14 Polytetrafluoroethylene, i.e. PTFE
• CPC Class Codes: Y10S 128/21 Silicone
• CPC Class Codes: Y10S 525/937 Utility as body contact e.g. implant, contact lens or I.U.D.
• CPC Class Codes: Y10T 428/1334 Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
• CPC Class Codes: Y10T 428/3154 Of fluorinated addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31544 Addition polymer is perhalogenated
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

An impermeable laminated membrane, constructed by the superposition of a silicone rubber membrane on a fluoro-rubber membrane, is disclosed.

This laminated membrane has an extremely low permeability so that its is effective for implantation into living organisms.

Claims

1. An implantable impermeable laminate membrane bag for use in living organisms comprising a laminate of at least one membrane of a cured dimethylsiloxane polymer and at least one membrane of a vinylidene fluoride-hexafluoropropylene-based fluororubber.

2. The impermeable laminate membrane bag according to claim 1, further comprising an additional membrane of the cured dimethylsiloxane polymer.

3. The impermeable laminate membrane bag according to claim 1 or 2 wherein the membrane of the vinylidene fluoride-hexafluoropropylene-based fluororubber is interposed between the two membranes of the cured dimethylsiloxane polymer.