Nonwoven with non-symmetrical bonding configuration
First Claim
1. 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.
9 Assignments
0 Petitions
Accused Products
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.
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Citations
19 Claims
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1. 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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
(A) oriented in parallel along an MD axis;
(B) oriented transverse to adjacent closed figures along MD axis; and
(C) oriented in sets with proximate closed figures so as form therebetween a closed configuration elongated in the MD.
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7. The laminate of claim 5, formed in a laminating station including a heated engraved hard roll adjacent one nonwoven and an unheated smooth soft roll adjacent the other nonwoven.
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8. The laminate of claim 5 wherein said laminate after lamination has a high MVTR and substantially no holes therein.
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9. The laminate of claim 5 wherein said second nonwoven is a spunbond.
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10. The laminate of claim 9 wherein said nonwoven is a spunbond.
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11. The laminate of claim 5 wherein said nonwoven is a spunbond.
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12. A laminate comprising the nonwoven of claim 1 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.
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13. The laminate of claim 12 wherein said closed figures elongated in said second direction are selected from the group consisting of closed figures:
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(A) oriented in parallel along an MD axis;
(B) oriented transverse to adjacent closed figures along an MD axis; and
(C) oriented in sets with proximate closed figures so as to form therebetween a closed configuration elongated in the MD.
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14. The laminate of claim 12, formed in a coating station including a nip roll adjacent said nonwoven and a chill roll adjacent said elastic film.
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15. The laminate of claim 12 wherein said nonwoven and said elastic film have comparable physical characteristics under stress.
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16. The laminate of claim 12 wherein said elastic film is coated onto said nonwoven.
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17. The laminate of claim 12 wherein said elastic film is cast coated onto said nonwoven.
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18. A laminate comprising the nonwoven of claim 1 and a second material, said second material being selected from the group consisting of a second nonwoven and an elastic film, said nonwoven having an embossed pattern of depressions and projections, with said second material entering the depressions of said nonwoven, said pattern defining closed figures elongated in said second direction.
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19. 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:
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(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.
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Specification