Back to results
US 11,560,658 B2Granted
Method of making a nonwoven web
AssigneeKimberly-Clark Worldwide, Inc.
InventorsTimothy D. Ferguson, David A. Palzewicz, Daniel M. Nussbaum, Tom R. Belau
Life of this patent
Estimating the term…
Abstract
Soft point bonded nonwoven webs, and methods of making the same, are described that utilize a pattern of small, discrete bond points in a sequent pattern that together form macro-elements. The macro-elements are themselves positioned and aligned within a pattern such that mechanical stretching operations on the point bonded nonwoven webs yields soft and bulky fabrics but with reduced incidence of tearing or rupturing of the individual bond points.
Claims13
A method of making a nonwoven web comprising:
- directing a fibrous nonwoven spunbond matt in a machine direction, said fibrous nonwoven spunbond matt having a first width in a cross-direction;
- pattern bonding the fibrous nonwoven spunbond matt and forming a pattern bonded nonwoven web, and wherein said pattern comprises (i) discrete individual bond points having a maximum dimension of 1.25 mm or less and an aspect ratio less than 3:1, (ii) macro-elements formed by the individual bond points in a sequent pattern and wherein the macro-elements extend substantially in the machine-direction and have a machine-direction length between about 4 and about 25 mm, (iii) unbonded pockets adjacent the macro-elements having an area between about 20 and about 50 mm2, (iv) an overall bond area of between about 5% and about 20%;
- and
- applying a first stretching force to the pattern bonded nonwoven web in the cross-direction whereby the pattern bonded nonwoven web stretches in the cross direction and has a second width in the cross-direction, the second cross direction width being greater than the first cross direction width;
- and
- applying a second stretching force to the pattern bonded nonwoven web in the machine direction whereby the pattern bonded nonwoven web necks and has a third width in the cross-direction, the third cross direction width being less than the second cross direction width, and wherein some but less than 2% of the individual bond points are ruptured after both the first and second stretching forces have been applied.
3 more elements
Dependencies are inferred from the claim text.