Method of forming a fibrous mat

Details Method of forming a fibrous mat Method of forming a fibrous mat

1993-09-16

1995-10-31

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162109, 162145, 162152, 162156, 162211, 162296, 162903, D21F 1100

Patent

active

054626420

ABSTRACT:
A method of producing a nonwoven fiber glass mat that contains discrete areas which are of different construction than the remainder of the mat. The permeable forming screen onto which a fibrous aqueous slurry is deposited is of a different structure in areas corresponding to the discrete areas of the mat so as to restrict the flow of water through those areas. Less fiber is deposited in those areas, resulting in the discrete areas being comprised of a thinner mat. The orientation of fibers within the discrete areas can be controlled by correlating the restricted flow of slurry in these areas to the flow of slurry necessary to cause this condition.

REFERENCES:
patent: 1616222 (1927-02-01), Harrigan
patent: 3103461 (1963-09-01), Smith et al.
patent: 3322617 (1967-05-01), Osborne
patent: 3350260 (1967-10-01), Johnson
patent: 3969561 (1976-07-01), Marshall
patent: 4070235 (1978-01-01), Marshall
patent: 5098519 (1992-03-01), Ramasubramanian
patent: 5158824 (1992-10-01), Gill et al.

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