Patent classifications
D01D5/098
Microporous composite sheet material
A moisture vapor permeable, water impermeable composite sheet material is provided which is suitable for use as a housewrap material, and is also useful for other applications such as tarpaulins, or as covers for automobile, boats, patio furniture or the like. The composite sheet material includes a nonwoven substrate and an extrusion-coated polyolefin film layer overlying one surface of the substrate. The nonwoven substrate is comprised of polymeric fibers randomly disposed and bonded to one another to form a high tenacity nonwoven web. The nonwoven substrate has a grab tensile strength of at least 178 Newtons (40 pounds) in at least one of the machine direction (MD) or the cross-machine direction (CD). The extrusion coated polyolefin film layer is intimately bonded to the nonwoven substrate. The film layer has micropores formed therein to impart to the composite sheet material a moisture vapor transmission rate (MVTR) of at least 35 g/m.sup.2/24 hr. at 50% relative humidity and 23° C. and a hydrostatic head of at least 55 cm. In one embodiment, the nonwoven substrate comprises a spunbonded nonwoven fabric formed of randomly disposed substantially continuous polypropylene filaments. The spunbonded nonwoven fabric is an area bonded fabric in which the filaments are bonded to one another throughout the fabric at locations where the randomly disposed filaments overlie or cross one another.
Fibrous Structures with Improved Tewl Properties
Fibrous structures and more particularly to fibrous structures that exhibit improved TEWL properties, for example lower TEWL % Difference Values as measured according to the TEWL Test Method described herein, compared to known fibrous structures, sanitary tissue products comprising such fibrous structures and method for making such fibrous structures are provided.
Fibrous Structures Different Fibrous Elements
Layered, and optionally dispersible fibrous structures containing fibrous elements that exhibit different physical characteristics, such as different average diameters as measured by the Average Diameter Test Method described herein, different surface characteristics, different lengths, different sources (naturally occurring versus non-naturally occurring and/or spun versus non-spun), sanitary tissue products employing such layered, optionally dispersible fibrous structures, and methods for making same are provided.
Layered Fibrous Structures with Different Common Intensive Properties
Layered, and optionally dispersible fibrous structures containing two or more layers that exhibit different common intensive properties, sanitary tissue products employing such layered, optionally dispersible fibrous structures, and methods for making same are provided.
Fibrous Structures Different Fibrous Elements
Layered, and optionally dispersible fibrous structures containing fibrous elements that exhibit different physical characteristics, such as different lengths, sanitary tissue products employing same, and methods for making same are provided.
Layered Fibrous Structures with Different Planar Layers
Layered, and optionally dispersible fibrous structures containing two or more layers that exhibit different planar characteristics, sanitary tissue products employing such layered, optionally dispersible fibrous structures, and methods for making same are provided.
Fibrous Structures Different Fibrous Elements
Layered, and optionally dispersible fibrous structures containing fibrous elements that exhibit different physical characteristics, such as different average diameters as measured by the Average Diameter Test Method described herein, different surface characteristics, different lengths, different sources (naturally occurring versus non-naturally occurring and/or spun versus non-spun), sanitary tissue products employing such layered fibrous structures, and methods for making same are provided.
Fibrous Structures Different Fibrous Elements
Layered, and optionally dispersible fibrous structures containing fibrous elements that exhibit different physical characteristics, such as different average diameters as measured by the Average Diameter Test Method described herein, different surface characteristics, different lengths, different sources (naturally occurring versus non-naturally occurring and/or spun versus non-spun), sanitary tissue products employing such layered, dispersible fibrous structures, and methods for making same are provided.
Fibrous Structures with Improved Surface Properties
Fibrous structures that exhibit improved surface properties, for example lower Force Variability Values as measured by the Glide on Skin Test Method described herein, compared to known fibrous structures, sanitary tissue products comprising such fibrous structures and method for making such fibrous structures are provided.
Fibrous Structures with Improved Surface Properties
Fibrous structures that exhibit improved surface properties, for example lower Force to Drag Values as measured by the Glide on Skin Test Method described herein, compared to known fibrous structures, sanitary tissue products comprising such fibrous structures and method for making such fibrous structures are provided.