Title:
Process for producing a structured, voluminous nonwoven
Document Type and Number:
WIPO Patent Application WO1997022742
Kind Code:
A3
Abstract:
PCT No. PCT/EP96/05481 Sec. 371 Date Dec. 22, 1998 Sec. 102(e) Date Dec. 22, 1998 PCT Filed Dec. 7, 1996 PCT Pub. No. WO97/22742 PCT Pub. Date Jun. 26, 1997A process for producing a structured, voluminous nonwowen comprises the following steps: (a) a spun nonwoven is produced from a plurality of individual filaments which are stretched and gathered into a skein of fibers; (b) the skein is pressed and not-bonded into a crude nonwoven (12) through a first pair of rollers (9a, b); and (c) the crude nonwoven is further processed through a second pair of rollers (10a, b). The process is characterized in that the individual filaments are initially stretched merely up to a range from 50 to 70% of their maximum possible extension, and in that the crude nonwoven (12) is further processed through a pair of rollers (10a, b) composed of a positive roller (10a) with numerous nops or elevations (11) distributed over the outer surface of the roller and of a negative roller (10) with just as numerous recesses or depressions (12). During rolling, the nops engage the recesses and further stretch the crude non-woven in the area of the roller nops.
Inventors:
WAGNER WERNER (DE)
Application Number:
PCT/EP1996/005481
Publication Date:
September 04, 1997
Filing Date:
December 07, 1996
Export Citation:
Assignee:
WAGNER WERNER (DE)
HCD GMBH (DE)
HCD GMBH (DE)
International Classes:
B31F1/07; D04H1/4291; D04H1/4334; D04H1/435; D04H1/44; D04H1/54; D04H3/007; D04H3/009; D04H3/011; D04H3/033; D04H3/14; D04H3/16; B29C59/04; (IPC1-7): D04H1/54; D04H3/16
Foreign References:
| US4333979A | 1982-06-08 | |||
| US4913911A | 1990-04-03 | |||
| US5057357A | 1991-10-15 | |||
| US5399174A | 1995-03-21 |
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