Low density nonwoven aramid sheets

Details Low density nonwoven aramid sheets Low density nonwoven aramid sheets

1984-06-01

1989-12-19

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162117, 162146, 1621573, 162192, 162206, D21H 502

Patent

active

048880914

ABSTRACT:
Less porous, more abrasion-resistant nonwoven aramid sheets are made by expanding a smooth-surface, dried, wet-laid sheet of fibrids and fibers, which has fused, nonexpandable, densified regions, segmented by spaced interruptions of nonfused regions of the sheet structure, in a pattern which encloses expandable portions of the sheet structure. The re-wet sheet is heated dielectrically to expand the interior of the nondensified portions without substantially roughening or disrupting their surface skin.

REFERENCES:
patent: 4515656 (1975-05-01), Memeger

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