US5124198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal fiber mat/polymer composite
Assignee: 3M Co
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Filing: 1991-05-21
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Granted: 1992-06-23
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Expires: 2011-05-21
Abstract
Abstract The present invention provides a metal/polymer composite comprising a polymeric substrate and a sintered mat of randomly-oriented metal fibers embedded therein, the fibers having a substantially circular cross-section and a diameter of about 10 to 200 μm. The polymeric substrate is typically a thin, flexible sheet-like material having a pair of planar surfaces. The polymeric substrate is preferably thermoformable. If thermoformability is desired the metal will have a melting point of less than the thermoforming temperature of the polymeric substrate. The thermoformable metal/polymer composite of the present invention may be stretched to at least 20%, and often can be stretched at least 200% of its original dimensions, at least in certain regions, without loss of electrical continuity or EMI shielding properties. The present invention also provides a method of making a metal/polymer composite and a sintered mat of randomly-oriented metal fibers.
Inventors
- 👤 David C. Koskenmaki
- 👤 Clyde D. Calhoun
- 👤 Pamela S. Tucker
- 👤 Robert L. Lambert, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:07
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/088; B32B15/00; B32B15/02; B29C70/10; B29C70/12; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/508; B29C70/88; B29C70/882; B29C70/885; B32B5/00; B32B5/02; B32B5/022; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2305/00; B29K2705/00; B29K2995/00; B29K2995/0003; B29K2995/0005; B32B2262/00; B32B2262/10; B32B2262/103; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/31504; Y10T428/31678; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/614; Y10T442/674
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
A thermoformable metal/polymer composite comprising a polymeric substrate and a sintered metal mat embedded therein, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, said metal fibers having a melting temperature less than the thermoforming temperature of the polymeric substrate.
Claim 2
Dependent Claim
60 words
A thermoformable metal/polymer composite comprising a polymeric substrate and a sintered metal mat embedded therein, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, said metal fibers having a melting temperature less than the thermoforming temperature of the polymeric substrate.
Claim 3
Dependent Claim
35 words
The composite of claim 1 wherein said substrate is a thin sheet-like material having first and second planar surfaces and a portion of said mat protruding from said first surfaces, thereby providing a conductive surface.
Claim 4
Dependent Claim
48 words
The composite of claim 2 wherein said metal is selected from the group consisting of tin, lead, bismuth, cadmium, indium, gallium, mixtures thereof, and alloys of said metals containing one or more metals selected from the group consisting of zinc, aluminum, copper, silver, gold, nickel, cobalt and iron.
Claim 5
Dependent Claim
32 words
The composite of claim 2 further including a second sintered metal mat embedded in said second planar surface, said second mat protruding from said second surface, thereby providing a second conductive surface.
Claim 6
Dependent Claim
15 words
The composite of claim 1 wherein said fibers have a diameter of about 25-100 μm.
Claim 7
Dependent Claim
87 words
A metal/polymer composite comprising: a) a first sheet-like polymeric layer; b) a sintered metal mat embedded in a second sheet-like polymeric layer, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, wherein said first polymeric layer is adhered to said second polymeric layer, and wherein said composite is thermoformable, said metal fibers having a melting point of less than the thermoforming temperature of said first polymeric layer.
Claim 8
Dependent Claim
87 words
A metal/polymer composite comprising: a) a first sheet-like polymeric layer; b) a sintered metal mat embedded in a second sheet-like polymeric layer, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, wherein said first polymeric layer is adhered to said second polymeric layer, and wherein said composite is thermoformable, said metal fibers having a melting point of less than the thermoforming temperature of said first polymeric layer.
Claim 9
Dependent Claim
27 words
The composite of claim 6 wherein portions of said sintered metal mat protrude from the surface of said second sheet-like polymeric layer, thereby providing a conductive surface.
Claim 10
Dependent Claim
110 words
A metal/polymer composite comprising: a) a first sheet-like polymeric layer; b) a second sheet-like polymeric layer; c) a sintered metal mat embedded in a third sheet-like polymeric layer, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, wherein said second sheet-like polymeric layer is disposed between said first and third layers, adhering said third layer having said sintered metal mat embedded therein to said first layer, and wherein said composite is thermoformable, said metal fibers having a melting point of less than the thermoforming temperature of said first polymeric layer.
Claim 11
Dependent Claim
110 words
A metal/polymer composite comprising: a) a first sheet-like polymeric layer; b) a second sheet-like polymeric layer; c) a sintered metal mat embedded in a third sheet-like polymeric layer, said mat comprising a plurality of fine, randomly-oriented metal fibers sintered at points of intersection, said fibers having a substantially circular cross-section and a diameter of about 10-200 μm, wherein said second sheet-like polymeric layer is disposed between said first and third layers, adhering said third layer having said sintered metal mat embedded therein to said first layer, and wherein said composite is thermoformable, said metal fibers having a melting point of less than the thermoforming temperature of said first polymeric layer.
Claim 12
Dependent Claim
27 words
The composite of claim 8, wherein portions of said sintered metal mat protrude from the surface of said third sheet-like polymeric layer, thereby providing a conductive surface.
Claim 13
Dependent Claim
38 words
The composite of claim 8 wherein said second polymeric layer comprises homopolymers, copolymers or oligopolymers derived from monomer units selected from the group consisting of ethylene, vinyl acrylates, vinyl acetates, vinyl alcohol, propylene, maleic-anhydride, styrene-butadiene, isoprene, and butylene.
References Cited (Backward Citations)
US3091262A
Cited
US3087233A
Cited
US3506526A
Cited
US3485595A
Cited
US3410936A
Cited
US3556914A
Cited
US3713787A
Cited
US3727292A
Cited
US3888711A
Cited
US3713477A
Cited
US3798093A
Cited
US3811976A
Cited
US4001357A
Cited
US3996167A
Cited
US4107363A
Cited
US4269800A
Cited
US4678699A
Cited
EP0194406A1
Cited
US4689098A
Cited
EP0227131A1
Cited
US4642244A
Cited
GB2189740A
Cited
US4880679A
Cited
US5028490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |