Elastomeric waterproof laminate
Patent 4443511 Issued on April 17, 1984. Estimated Expiration Date: 
November 19, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 19, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesProcess for producing porous products Waterproof laminate Production of asymmetric porous film materials Patent #: 4277429 InventorsAssigneeApplicationNo. 06/443137 filed on 11/19/1982US Classes:428/198, Spot bonds connect components264/127, Fluorocarbon resin264/288.8, Nonuniform product (e.g., porous, etc.) or with tensioning before application of heat264/290.2, Biaxial or transverse to travel direction428/196, Including layer of mechanically interengaged strands, strand-portions or strand-like strips428/197, Knitted, with particular or differential bond sites or intersections428/422, Addition polymer is perhalogenated428/423.1, Of polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.)428/910, PRODUCT WITH MOLECULAR ORIENTATION442/328Nonwoven fabric has an elastic qualityExaminersPrimary: Bell, James J.Attorney, Agent or FirmInternational ClassesA41D 31/00 (20060101)A41D 31/02 (20060101) B32B 27/12 (20060101) D06N 3/04 (20060101) D06N 3/00 (20060101) D06N 3/18 (20060101) AbstractThis invention provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article for use in, for example, material for protective articles. The waterproof and breathable polytetrafluoroethylene layered article can for example, exhibit elastomeric properties of stretch to break of 275% in the machine direction, and 145% in the transverse direction and a total stretch recovery of at least 39% after being stretched to 75% extension for 100 cycles. This invention further provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric. The waterproof and breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric is thus durable and possesses a moisture vapor transmission rate exceeding 1000 gms/m2 day, and preferably above about 2000 gms/m2 day.Field of SearchOf fluorinated addition polymer from unsaturated monomersAddition polymer is perhalogenated Of polyamidoester (polyurethane, polyisocyanate, polycarbamate, etc.) PRODUCT WITH MOLECULAR ORIENTATION Spot bonds connect components Including layer of mechanically interengaged strands, strand-portions or strand-like strips | |
