Papermaker's felt incorporating a closed cell polymeric foam lay

Details Papermaker's felt incorporating a closed cell polymeric foam lay Papermaker's felt incorporating a closed cell polymeric foam lay

1988-08-22

1989-05-16

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

162358, 162DIG1, 428280, 428282, 428300, B32B 502

Patent

active

048309052

ABSTRACT:
A papermaker's felt having improved water extraction characteristics. The felt is composed of a base fabric, and a layer of a closed cell polymeric foam is disposed on a face of the base fabric. A batt of fibrous material is needled to the base fabric and foam layer. The needling operation penetrates the fibers of the batt into the foam layer, intersecting the cells. The resiliency of the foam tends to close the cell walls against the penetrated fibers so that under uncompressed conditions, the felt is substantially impervious. Under compressive forces, as occurs in the nip between press rolls, the interfaces between the penetrated fibers and the cell walls will open to enable water to be extracted through the felt.

REFERENCES:
patent: 3059312 (1962-10-01), Jamieson
patent: 3617442 (1971-11-01), Hurschman
patent: 3772746 (1973-11-01), Ivanowicz
patent: 4271222 (1981-06-01), Hahn
patent: 4357386 (1982-11-01), Luciano et al.
patent: 4369081 (1983-01-01), Curry et al.
patent: 4469740 (1984-09-01), Bailly
patent: 4701368 (1987-10-01), Kiuchi et al.

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