Nonwoven with non-symmetrical bonding configuration
AssigneeFirst Quality Nonwovens, Inc.
InventorsMichael Kauschke, Mordechai Turi
Life of this patent
Estimating the term…
Abstract
A nonwoven has low tensile and high elongation in the first direction (typically the CD) and high tensile and low elongation in the second direction (typically the MD). The nonwoven has a plurality of bonding points defining a total bonding area along the second direction greater than along the first direction. Accordingly, the nonwoven has unbonded fiber portions and bonded fiber portions, with a bonded portion/unbonded portion ratio greater along the second direction than along the first direction. The bonding points are preferably either circular or oval in plan.
Claims19
A nonwoven wherein orthogonally differential bonding provides high elongation in a first direction and low elongation in a second direction, said nonwoven having a plurality of bonding points defining a total bonding area along said second direction greater than along said first direction, said bonding points forming a uniform pattern of bond density in the first direction different from a uniform pattern of bond density in the second direction, said bonding points being closed figures elongated in said second direction and selected from the group consisting of closed figures:
- (A) oriented in parallel along said second direction axis;
- (B) oriented transverse to adjacent closed figures along said second direction axis;
- and
- (C) oriented in sets with proximate closed figures so as to form therebetween a closed configuration elongated in said second direction.
A member having high elongation in a first direction and low elongation in a second direction, said member being selected from the group consisting of:
- (A) a nonwoven characterized by orthogonally differential bonding and having high elongation in a first direction and low elongation in a second direction, said nonwoven having a plurality of bonding points defining a total bonding area along said second direction greater than along said first direction, said bonding points forming a uniform pattern of bond density in the first direction different from the uniform pattern of bond density in the second direction, said bonding points being closed figures elongated in said second direction and selected from the group consisting of closed figures:
- (i) oriented in parallel along said second direction axis;
- (ii) oriented transverse to adjacent closed figures along said second direction axis;
- and
- (iii) oriented in sets with proximate closed figures so as to form therebetween a closed configuration elongated in said second direction;
- (B) a laminate comprising said nonwoven and a second nonwoven, said nonwoven having an embossed pattern of depressions and projections, with said second nonwoven entering the depressions of said nonwoven, said pattern defining closed figures elongated in said second direction;
- and
- (C) a laminate comprising said nonwoven and an elastic film, said nonwoven having an embossed pattern of depressions and projections, with said elastic film entering the depressions of said nonwoven, said pattern defining closed figures elongated in said second direction.
Dependencies are inferred from the claim text.