# US 8,784,968 B2 · Waterproof breathable composite materials for fabrication of flexible membranes and other articles > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,784,968 B2 - Document ID: US8784968B2 - Status: Granted - Kind: B2 - Application number: 13/168,912 - Filed: 2011-06-24 - Published: 2012-04-26 - Granted: 2014-07-22 - Earliest claimed: 2010-06-24 - Assignees: Cubic Tech Corporation - Applicants: Christopher Michael Adams; Roland Joseph Downs; Keith Joel McDaniels - Inventors: Christopher Michael Adams; Roland Joseph Downs; Keith Joel McDaniels - Web page: https://patentgrep.com/patent/US8784968B2 ## CPC - B32B 5/12: characterised by the relative arrangement of fibres or filaments of {different layers, e.g. the fibres or filaments being parallel or perpendicular to each other} - B32B 3/266: {characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12} - B32B 5/022: {Non-woven fabric} - B32B 7/14: applied in spaced arrangements, e.g. in stripes - B32B 27/12: next to a fibrous or filamentary layer - B32B 27/322: {comprising halogenated polyolefins, e.g. PTFE} - B32B 27/40: comprising polyurethanes - B32B 2250/02: 2 layers - B32B 2250/03: 3 layers - B32B 2250/04: 4 layers - B32B 2262/0253: Polyolefin fibres - B32B 2262/12: Conjugate fibres, e.g. core/sheath or side-by-side - B32B 2307/514: Oriented - B32B 2307/5825: Tear resistant - B32B 2307/724: Permeability to gases, adsorption - B32B 2307/7242: Non-permeable - B32B 2307/7265: Non-permeable - B32B 2437/00: Clothing - B32B 2605/12: Ships - Y10T 428/24: Structurally defined web or sheet [e.g., overall dimension, etc.] - Y10T 428/24033: including stitching and discrete fastener[s], coating or bond - Y10T 428/24058: including grain, strips, or filamentary elements in respective layers or components in angular relation - Y10T 428/24074: Strand or strand-portions - Y10T 428/24091: with additional layer[s] - Y10T 428/24099: On each side of strands or strand-portions - Y10T 428/24132: including grain, strips, or filamentary elements in different layers or components parallel - Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] - Y10T 442/643: Including parallel strand or fiber material within the nonwoven fabric - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A waterproof breathable material has a higher strength-to-weight ratio and higher tear resistance-to-weight ratio than traditional materials, and may be applied in a wide field of potential uses. A non-woven composite material comprises at least one waterproof breathable (W/B) membrane, a first unidirectional non-woven composite layer having multiple fibers enclosed by adhesive in parallel to each other, a second unidirectional non-woven composite layer having multiple fibers enclosed in adhesive in parallel to each other. The first unidirectional non-woven composite layer is positioned such that the fibers are oriented 90° relative to the fibers of the second unidirectional non-woven composite layer, and a space is formed between the first and second multiple fibers. No adhesive is present in the space. ## Claims ### Claim 1 A non-woven composite material comprising: at least one waterproof breathable (W/B) membrane; and at least one unidirectional fiber reinforced layer comprising parallel fibers embedded in a W/B polymer, said fibers enclosed by a non-W/B adhesive; wherein spaces between said parallel fibers are absent said non-W/B adhesive, and wherein said W/B membrane is bonded to said W/B polymer. ### Claim 2 (depends on 1) The non-woven composite material of claim 1, wherein at least one unidirectional fiber reinforced layer comprises a unidirectional fiber/matrix tape. ### Claim 3 (depends on 1) The non-woven composite material of claim 1, further comprising at least one layer of woven or non-woven fabric. ### Claim 4 A non-woven composite material comprising: at least one waterproof breathable (W/B) membrane; a first unidirectional fiber reinforced layer comprising a first set of parallel fibers embedded in a W/B polymer, said first set of parallel fibers enclosed by a non-W/B adhesive; a second unidirectional fiber reinforced layer comprising a second set of parallel fibers embedded in a W/B polymer, said second set of parallel fibers enclosed by a non-W/B adhesive; wherein said first and second layers are bonded together such that said first and second sets of parallel fibers are 90° relative to one another; wherein spaces between said fibers are absent said non-W/B adhesive; and wherein said W/B membrane is bonded to ether one of said first or second layers. ### Claim 5 (depends on 4) The non-woven composite material of claim 4, further comprising at least one layer of woven or non-woven fabric. ### Claim 6 (depends on 4) The non-woven composite material of claim 4, wherein said at least one water breathable (W/B) layer consist of two W/B membrane layers, one of which is bonded to said first unidirectional fiber reinforced layer, the other of which is bonded to said second unidirectional fiber reinforced layer. ### Claim 7 (depends on 4) The non-woven composite material of claim 4, wherein at least one of said first or second unidirectional fiber reinforced layers comprises a unidirectional fiber/matrix tape. ### Claim 8 (depends on 4) The non-woven composite material of claim 4, further comprising a third unidirectional fiber reinforced layer comprising a third set of parallel fibers embedded in a W/B polymer, said third set of parallel fibers enclosed by a non-W/B adhesive; wherein said third unidirectional fiber reinforced layer is positioned relative to said first and second layers such that said third set of parallel fibers are 45° relative to said first set of parallel fibers; wherein spaces between said fibers are absent said non-W/B adhesive; and wherein said third unidirectional fiber reinforced layer is bonded to any one of said W/B membrane, first layer, or second layer. ### Claim 9 (depends on 8) The non-woven composite material of claim 8, further comprising at least one layer of woven or non-woven fabric. ### Claim 10 (depends on 8) The non-woven composite material of claim 8, wherein at least one of said first, second or third unidirectional fiber reinforced layers comprise a unidirectional fiber/matrix tape. ### Claim 11 (depends on 8) The non-woven composite material of claim 8, further comprising a fourth unidirectional fiber reinforced layer comprising a fourth set of parallel fibers embedded in a W/B polymer, said fourth set of parallel fibers enclosed by a non-W/B adhesive; wherein said fourth unidirectional fiber reinforced layer is positioned relative to said first, second and third layers such that said fourth set of parallel fibers are 90° relative to said third set of parallel fibers; wherein spaces between said fibers are absent said non-W/B adhesive; and wherein said fourth unidirectional fiber reinforced layer is bonded to any one of said W/B membrane, first layer, second layer, or third layer. ### Claim 12 (depends on 11) The non-woven composite material of claim 11, further comprising at least one layer of woven or non-woven fabric. ### Claim 13 (depends on 11) The non-woven composite material of claim 11, wherein at least one of said first, second, third or fourth unidirectional fiber reinforced layers comprise a unidirectional fiber/matrix tape. ### Claim 14 A non-woven composite material comprising: a first unidirectional fiber reinforced layer comprising a first set of parallel fibers embedded in a waterproof breathable (W/B) polymer adhesive; a second unidirectional fiber reinforced layer comprising a second set of parallel fibers embedded in a W/B polymer adhesive; wherein said first and second layers are bonded together such that said first and second sets of parallel fibers are disposed 90° relative to one another. ### Claim 15 (depends on 14) The non-woven composite material of claim 14, further comprising a W/B membrane bonded to said first unidirectional fiber reinforced layer. ### Claim 16 (depends on 15) The non-woven composite material of claim 15, further comprising a second W/B membrane bonded to said second unidirectional fiber reinforced layer. ### Claim 17 (depends on 14) The non-woven composite material of claim 14, further comprising a third unidirectional fiber reinforced layer comprising a third set of parallel fibers embedded in a W/B polymer adhesive, wherein said third unidirectional fiber reinforced layer is bonded to any one of said first or second layers such that said third set of parallel fibers is disposed 45° relative to said first set of parallel fibers. ### Claim 18 (depends on 14) The non-woven composite material of claim 14, further comprising a third unidirectional fiber reinforced layer comprising a third set of parallel fibers embedded in a W/B polymer, said third set of parallel fibers enclosed by a non-W/B adhesive, wherein spaces between said fibers are absent said non-W/B adhesive; and wherein said third unidirectional fiber reinforced layer is bonded to any one of said first or second layers such that said third set of parallel fibers is disposed 45° relative to said first set of parallel fibers. ### Claim 19 (depends on 17) The non-woven composite material of claim 17, further comprising a W/B membrane bonded to any of said layers. ### Claim 20 (depends on 18) The non-woven composite material of claim 18, further comprising a W/B membrane bonded to any of said layers.