Sound insulating sheet containing lead fibers
AssigneeToray Industries, Inc.
InventorsYoshikazu Kikuchi, Hirotsugu Suzuki, Kenji Yabe
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Abstract
A nonporous flexible sound insulating sheet is provided which is composed of 50 to 90 wt.% of a nonwoven lead fiber fabric and 10 to 50 wt.% of a vinyl chloride polymer reinforcing material. The reinforcing material fills the spaces between individual lead fibers of the nonwoven fabric to secure the individual lead fibers in their places. The lead fibers are substantially uniformly distributed in the nonwoven fabric and are disposed such that the axes of the lead fibers extend, as a whole, substantially at random in all directions, and such that the lead fibers are not exposed on the surface of the sound insulating sheet. The sound insulation sheet has a thickness of 0.3 to 2.0 mm and a specific gravity of 2.0 to 6.5.
Claims5
A nonporous flexible sound insulating sheet composed of 50 to 90% by weight of a nonwoven lead fiber fabric and 10 to 50% by weight of a vinyl chloride polymer reinforcing material, said reinforcing material filling the spaces between individual lead fibers of the nonwoven fabric to secure the individual lead fibers in their place;
- said lead fibers being substantially uniformly distributed in the nonwoven fabric and being disposed such that the axes of the lead fibers extend, as a whole, substantially at random in all directions, and such that the lead fibers are not exposed on the surface of the sound insulating sheet, said sound insulating sheet having a thickness of 0.3 to 2.0 mm and a specific gravity of 2.0 to 6.5.
Dependencies are inferred from the claim text.