Electret tubular nonwoven fabric comprising circumferentially or

Details Electret tubular nonwoven fabric comprising circumferentially or Electret tubular nonwoven fabric comprising circumferentially or

1993-12-28

1995-07-04

Withers, James D.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

55DIG39, 307400, 428 361, 428286, 428294, 428298, G11C 1302, B29D 2200, B32B 2700

Patent

active

054298482

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:
patent: 4215682 (1980-08-01), Kubik et al.
patent: 4948515 (1990-08-01), Okumura et al.
patent: 5035240 (1991-07-01), Braun et al.

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