Nonwoven loop member for a mechanical fastener

• US 7,805,818 B2
• Filed: 02/18/2004
• Issued: 10/05/2010
• Est. Priority Date: 09/05/2001
• Status: Expired due to Fees

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Horn, Thomas Alexander, Simmons, John Norman
• Primary Examiner(s): Lavinder; Jack W.
• Application Number:
  US10/781,613
• Publication Number:
  US 20040158957A1
• Time in Patent Office: 2,421 Days
• Field of Search: 244/42, 244/44, 244/47, 244/48, 604/391, 156/290, 428/94, 428/96, 428/97, 428/99, 442/408, 442/409
• US Class Current: 24/448
• CPC Class Codes: A44B 18/0011 Female or loop elements A44B18/0007 takes precedence
• CPC Class Codes: A61F 13/62 Mechanical fastening means, A61F13/5611, A61F13/5616, A61F13/581, A61F13/66 take precedence; Fabric strip fastener elements, e.g. hook and loop
• CPC Class Codes: A61F 13/627 characterised by the loop
• CPC Class Codes: Y10T 24/27 including readily dissociable fastener having numerous, protruding, unitary filaments randomly interlocking with, and simultaneously moving towards, mating structure [e.g., hook-loop type fastener]
• CPC Class Codes: Y10T 24/2758 Thermal or adhesive
• CPC Class Codes: Y10T 428/23986 With coating, impregnation, or bond
• CPC Class Codes: Y10T 428/24124 Fibers

Abstract

A loop member for a mechanical fastener comprises a nonwoven web, the nonwoven web having a pattern of intersecting bond lines. The pattern is characterized in that at least a portion comprises a first plurality of non-intersecting continuous bond lines and a second plurality of non-intersecting continuous bond lines, each non-intersecting continuous bond line of the first plurality intersecting each non-intersecting continuous bond line of the second plurality. The intersecting bond lines define unbonded pattern elements, each of the pattern elements being at least partially bounded by non-linear segments of the bond lines. The bond pattern for a nonwoven web is suitable for use as a loop member of a mechanical fastener. The bond pattern comprises intersecting bond lines having a uniform width and defining a number of bond pattern elements per unit area, wherein at least one of the bond lines is nonlinear, and wherein the ratio of contour to overall bonded area of the bond pattern is greater than a bond pattern comprising all straight lines having the same uniform line width and defining the same number of bond pattern elements per unit area.

Claims

1. A fibrous web having a pattern of intersecting bond lines, said pattern comprising a first plurality of linear non-intersecting continuous bond lines and a second plurality of non-linear non-intersecting continuous bond lines, each linear non-intersecting continuous bond line of said first plurality intersecting each non-linear non-intersecting continuous bond line of said second plurality, said pattern of intersecting bond lines defining unbonded pattern elements, each of said pattern elements being bounded by two linear segments and two non-linear segments.

2. The web of claim 1 wherein each bond line in said first plurality of linear non-intersecting continuous bond lines is disposed at a constant equal distance from adjacent bond lines.

3. The web of claim 1, wherein each bond line in said second plurality of non-linear non-intersecting continuous bond lines defines a wave pattern.

4. The web of claim 3, wherein in said second plurality of non-linear non-intersecting continuous bond lines adjacent bond lines are 180 degrees out of phase.

5. The web of claim 1, wherein said nonwoven web is chosen from the group consisting of:

spunbond webs, meltblown webs, carded webs, and hydroentangled webs.

6. The web of claim 1, wherein said nonwoven web is bonded to a backing member.

7. The web of claim 6, wherein said backing member is elastomeric, and said nonwoven web is shirred.

8. The web of claim 1, wherein the fibrous web is a nonwoven web.