High bulk, embossed fiber sheet material and apparatus and method of manufacturing the same
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United States of America Patent
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Jul 18, 1989
Issued Date -
N/A
app pub date -
Jan 14, 1988
filing date -
Dec 4, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A bulky, embossed, fibrous web material having a basis weight in the range of 5 to 50 lbs./ream and geometric means tensile strength (TS) (kg/3' width), apparent bulk (AB) (cal. pts./lb. ream), and oil holding capacity (OH) (ml/gm fiber) substantially satisfying, in absolute values, the relationships (0.27 BW-1) TS>(0.17 BW-1), AB>[0.7-(TS.div.20)], and OH 0.063TS.sup.2 -1.13TS+8.6. The invention includes an apparatus and a method of manufacturing the product comprising wet pressing a fibrous web to about 30% to 50% solids, conveying the web to a transfer position proximate the three-dimensional surface of an embossing fabric moving at a speed less than that of the web at the transfer position, and applying a vacuum to the web through the embossing fabric to transfer and conform the web to the three-dimensional surface of the fabric, the vacuum magnitude being in the range of 1 to 20 inches Hg.
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