Sound insulating sheet containing lead fibers

Details Sound insulating sheet containing lead fibers Sound insulating sheet containing lead fibers

1976-12-01

1978-09-05

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428246, 428253, 428285, 428297, 428302, 428409, B32B 502

Patent

active

041121759

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.

REFERENCES:
patent: 3184368 (1965-05-01), Juras
patent: 3253947 (1966-05-01), McCluer et al.
patent: 3410936 (1968-11-01), Juras
patent: 3556914 (1971-01-01), Juras
patent: 3622432 (1971-11-01), McCluer et al.
patent: 3719538 (1973-03-01), Carlson et al.
patent: 3767505 (1973-10-01), Coran et al.
patent: 3973059 (1976-08-01), Brown et al.
patent: 3976728 (1976-08-01), Hawthorne

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