Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Noninterengaged fiber-containing paper-free web or sheet...
Reexamination Certificate
2005-05-17
2005-05-17
Dixon, Merrick (Department: 1774)
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Noninterengaged fiber-containing paper-free web or sheet...
C428S903000, C428S296700, C181S296000, C181S290000, C181S286000
Reexamination Certificate
active
06893711
ABSTRACT:
The present invention relates an acoustical insulation material for sound attenuation containing a nonwoven web. Surprisingly, it has been discovered that an acoustical insulation material made from a nonwoven web of thermoplastic fibers having an average fiber diameter of less than about 7 microns, wherein the acoustical insulation has a thickness less than about 3 mm and a density of greater than about 50 kg/m3is effective as a sound insulation material. The acoustical insulation is very effective as an acoustical insulation material, despite the low thickness and high density of the acoustical insulation. A method of attenuating sound waves passing from a sound source area to a second area using the acoustical insulation material is also disclosed.
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Frazier Nina
Williamson Bruce Scott
Dean, Jr. Ralph H.
Dixon Merrick
Kimberly--Clark Worldwide, Inc.
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