Process for producing a structured, voluminous nonwoven
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United States of America Patent
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Oct 24, 2000
Grant Date -
N/A
app pub date -
Dec 22, 1998
filing date -
Dec 19, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A 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.
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