Composite sheet material
AssigneesFitesa High Point Inc., Fitesa Germany GmbH
InventorsDavid Alan Rohrbach, Ted Larry Clodfelter, Gustavo Osorio
Life of this patent
Estimating the term…
Abstract
Provided is a composite sheet material including a nonwoven fabric having an outer exterior surface comprising a plurality of discreet, spaced-apart projections extending outwardly from the exterior surface. Collectively, the spaced-apart projections define a three-dimensional topography characterized by the plurality of spaced-apart projections and valleys disposed therebetween. The composite sheet material is particularly useful as a wiper instrument.
Claims22
A composite sheet material suitable for use as a wipe comprising
- a first meltblown layer comprised predominately of polypropylene, and having an exterior surface characterized by a repeating pattern comprising a plurality of spaced-apart projections defining a three-dimensional topography characterized by the plurality of spaced-apart projections extending outwardly from said exterior surfaces and a plurality of valleys disposed therebetween;
- and
- a second meltblown layer comprised predominately of polypropylene, and wherein the first meltblown layer has a machine direction (MD) Roughness (Rz) from about 600 to 1100 μm.
A wiper comprising a composite sheet material comprising of a first meltblown layer composed predominately of a polypropylene resin having an MFR ranging from about 400 to 650 g/10 min., and a second meltblown layer predominately comprising a polypropylene resin having an MFR ranging from about 1,100 to 2,000 g/10 min., and wherein an exterior surface of the first meltblown layer exhibits a Shore Hardness A that is at least 10% greater than the Shore Hardness A of an exterior surface of the second meltblown layer, and wherein the first meltblown layer has a machine direction (MD) Roughness (Rz) from about 600 to 1100 μm.
Dependencies are inferred from the claim text.