Perforated, embossed film to foam laminates having good acoustic

Details Perforated, embossed film to foam laminates having good acoustic Perforated, embossed film to foam laminates having good acoustic

1976-11-22

1978-06-27

Cannon, J.C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

52145, 156209, 156220, 181286, 181290, 181294, 181DIG1, 296137A, 428158, 428159, 428160, 428161, 428163, 428164, 428167, 428182, 428311, 428315, 428321, B32B 324, B32B 532, E04B 186, E04F 1300, G10K 1104

Patent

active

040976335

ABSTRACT:
An embossed film-to-foam laminate is provided having minute perforations through the film selectively distributed essentially along the sidewalls and valleys of the embossed pattern. The integrity of the laminated film material is retained on the crowns of the embossed patterned surface, since the perforations in the film material are mainly distributed on the sidewalls and valleys of the embossed pattern. The laminated product has a water-resistant and abrasion-resistant upper surface imparted by the film material on the crowns while the small perforations in the sidewalls and valleys permit sound to pass through the film and be exposed to the acoustical matrix of the open cell foam component of the laminate while impeding the penetration of liquids (e.g. water) through the film into the foam under the action of gravity. The film and/or the foam material are heated to supply adhesive material by melting or softening which serves to bond the film material to the foam.

REFERENCES:
patent: 2967583 (1961-11-01), Jack
patent: 3160549 (1964-12-01), Caldwell et al.
patent: 3712846 (1973-01-01), Daniels et al.
patent: 3770560 (1973-11-01), Elder et al.
patent: 3848043 (1974-11-01), Garrick et al.

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