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US5770531: Mechanical and internal softening for nonwoven web

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Filing Information

Inventor(s) Gregory Todd Sudduth · Ali Yahiaoui ·
Assignee(s) Kimberly--Clark Worldwide, Inc. ·
Attorney/Agent(s) James B. Robinson ·
Primary Examiner Marion E. McCamish ·
Assistant Examiner Elizabeth M. Cole ·
Application Number US8639637
Filing date 04/29/1996
Issue date 06/23/1998
Predicted expiration date 04/29/2016
U.S. Classifications 442/361  · 442/381  ·
International Classifications B32B 2316  ·
Kind CodeA
International Classifications 442361;381;382;392;414 ·
17 Claims, No Drawings


Abstract

There is provided a web which has been spun from a mixture of thermoplastic polymer and a softening additive in an amount up to about 3 weight percent, and which has been mechanically treated to increase softness. The web has a final cup crush value which is less than 50 percent of the starting cup crush value and the drop in cup crush value is greater than the sum of the treatments individually. The web may be a single layer or may be a laminate of spunbond and other materials such as meltblown and coform fabrics.

Independent Claims | See all claims (17)

  1. 1. A nonwoven web comprising a polymer and between a positive amount and about 3 weight percent of an internal softening agent having a formula consisting essentially of ##STR2## wherein n is from 3 to about 1,000, and which web has been mechanically softened wherein the web has a cup crush value which is less than 50 percent of a cup crush value of the same fabric without said internal additive and said mechanical softening.
  2. 16. A nonwoven web comprising a polymer and between a positive amount and about 3 weight percent of a siloxane softening agent having a formula consisting essentially of: ##STR3## wherein n is from 3 to about 1000, and which web has been neck stretched to a second width of between about 50 and 95 percent of its starting, first, unstretched width and un-necked is to a third width of between about 80 and 150 percent of its starting, unstretched width and which has a cup crush value which is less than 50 percent of a cup crush value of the same fabric without said internal additive and said mechanical softening.

References Cited

U.S. Patent Documents

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Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE2513251BAYER AGSep 1976

Other Publications

Riggs, C. L., and Sherill, J. C., Textile Laundering Technology, 1979, p. 71-74.
American Dyestuff Reporter, Sep. 1973, p. 24-26.
Textile World, Dec. 1973, p. 45-46.

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
DE10102501 ADVANCED DESIGN CONCEPTS GMBH MUELLER ANDREAS et al. Aug 2002
GB2362894 KIMBERLY CLARK CO MITCHLER PATRICIA ANN et al. Dec 2001
US6203889 Kimberly-Clark Worldwide, Inc. Roger Bradshaw Quincy, III et al. Mar 2001
US6319342 Kimberly-Clark Worldwide, Inc. Wilfred Eugene Riddell Nov 2001
US6103061 Kimberly-Clark Worldwide, Inc. Ralph L. Anderson et al. Aug 2000
US8420557 --
US6749641 Milliken & Company Elizabeth Cates et al. Jun 2004
US7297643 Milliken & Company Elizabeth Cates et al. Nov 2007
US7270723 Kimberly-Clark Worldwide, Inc. Ann Louise McCormack et al. Sep 2007
US6723669 Kimberly-Clark Worldwide, Inc. Darryl Franklin Clark et al. Apr 2004
US6936076 Milliken & Company Elizabeth Cates et al. Aug 2005
US7048818 Velcro Industries B.V. K. Theodor Krantz et al. May 2006
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US6896843 Kimberly-Clark Worldwide, Inc. Vasily Aramovich Topolkaraev et al. May 2005
US7226880 Kimberly-Clark Worldwide, Inc. Prasad Shrikirshna Potnis Jun 2007
US6494974 Kimberly-Clark Worldwide, Inc. Wilfred Eugene Riddell Dec 2002
US6417120 Kimberly-Clark Worldwide, Inc. Patricia Ann Mitchler et al. Jul 2002
US6936075 Milliken Kirkland W. Vogt et al. Aug 2005
US6835264 Kimberly-Clark Worldwide, Inc. John Joseph Sayovitz et al. Dec 2004
US7037346 Milliken & Company Elizabeth Cates et al. May 2006
US7220478 Kimberly-Clark Worldwide, Inc. Ann Louise McCormack et al. May 2007
US7018945 Kimberly-Clark Worldwide, Inc. Ali Yahiaoui et al. Mar 2006
US7932196 Kimberly-Clark Worldwide, Inc. Ann Louise McCormack et al. Apr 2011