Process for producing a tubular nonwoven fabric and tubular nonw

Details Process for producing a tubular nonwoven fabric and tubular nonw Process for producing a tubular nonwoven fabric and tubular nonw

1992-06-11

1994-03-22

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156 626, 156169, 156170, 156173, 156174, 156175, 156184, 156191, 156193, 15624421, B32B 3102

Patent

active

052960617

ABSTRACT:
Disclosed are a process for producing a tubular nonwoven fabric and tubular nonwoven fabrics produced by the same. In the process, a web is formed on a first rotating cylinder by catching fibers carried to the surface of the first rotating cylinder by a fluid, the web is transferred to a second rotating cylinder, a tube of the transferred web is formed on and around the second rotating cylinder, and the tube is drawn in the axial direction of the second rotating cylinder to form a tubular nonwoven fabric. The tubular nonwoven fabric with a high unit weight can be produced without elongating or breaking the nonwoven fabric, and the diameter of the tubular nonwoven fabric can be freely changed.

REFERENCES:
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patent: 2886877 (1959-05-01), Frickert et al.
patent: 3303010 (1964-02-01), Copenhefer
patent: 3674599 (1972-07-01), Wiltshire
patent: 3801400 (1974-04-01), Vogt et al.
patent: 3874970 (1975-04-01), Dunn
patent: 3933557 (1976-01-01), Pall
patent: 4021281 (1977-05-01), Pall
patent: 4240864 (1980-12-01), Lin
patent: 4593706 (1986-06-01), Preston et al.
patent: 4731215 (1988-03-01), Schwarz

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