Refastenable mechanical fastening system

• US 5,540,673 A
• Filed: 01/31/1995
• Issued: 07/30/1996
• Est. Priority Date: 01/31/1989
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Cox, Robert G. Jr., Goulait, David J. K., Thomas, Dennis A.
• Primary Examiner(s): CLARKE, ROBERT A
• Application Number:
  US08/381,025
• Time in Patent Office: 546 Days
• Field of Search: 604/391, 24/442-452, 128/DIG. 15, 2/920, 2/912-919
• US Class Current: 604/391
• CPC Class Codes: A44B 18/0049 obtained by moulding processes compression moulding or articles of indefinite length characterised by the shape of the surface B29C43/222; screen moulding B29C67/08
• CPC Class Codes: A44B 18/0061 Male or hook elements A44B18/0053 takes precedence
• CPC Class Codes: A61F 13/625 characterised by the hook
• CPC Class Codes: B29C 43/222 characterised by the shape of the surface
• CPC Class Codes: B29L 2031/729 Hook and loop-type fasteners
• CPC Class Codes: Y10S 128/15 Hook and loop type fastener
• CPC Class Codes: Y10S 2/912 Garment having a hook-loop type fastener
• 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]

Abstract

The invention is a refastenable mechanical fastening system, made of free formed prongs joined to a substrate. The prongs taper and are nonperpendicularly oriented relative to the plane of the substrate. The prongs also have an azimuthal angle relative to the machine direction of the substrate. Each prong has an engaging means projecting laterally from the periphery of the prong. The free formed prongs are manufactured by the process of depositing liquid material onto a moving substrate, stretching the liquid material in a direction parallel to the plane of the substrate, severing the stretched material to form the distal end and engaging means of the prong, and imparting an azimuthal angle to the prong. The advantageous usage of the fastening system in an article of manufacture, such as a disposable absorbent garment, specifically a diaper, is also disclosed.

Claims

1. An article having a machine direction and a cross-machine direction comprising:

a substrate; and

a fastening system for attaching to a complimentary receiving surface, said fastening system comprising a multiplicity of prongs, each said prong comprising;

a shank joined to said substrate at a base, said shank having a proximal end contiguous with said base and projecting outwardly from said substrate, said shank being nonperpendicularly oriented relative to the plane of said substrate, said shank further having an azimuthal angle between about 20° and

about 160°

; and

an engaging means joined to said shank and projecting laterally beyond the periphery of said shank.

2. The article of claim 1 wherein said shank has an azimuthal angle ranging from about 45°

to about 135°

.

3. The article of claim 1 wherein said shank has an azimuthal angle ranging from about 60°

to about 120°

.

4. The article of claim 1 wherein said shank has an azimuthal angle of about 90°

.

5. The article of claim 1 wherein each said prong additionally comprises a shank having a leading angle and a trailing angle, said leading angle being substantially different from said trailing angle.

6. An absorbent article comprising:

a topsheet;

a backsheet joined with said topsheet;

an absorbent core positioned between said topsheet and said backsheet; and

a fastening system comprising;

a substrate; and

a multiplicity of prongs, each said prong comprising;

a shank joined to said substrate at a base, said shank having a proximal end contiguous with said base and projecting outwardly from said substrate, said shank being nonperpendicularly oriented relative to the plane of said substrate, said shank further having an azimuthal angle between about 20° and

about 160°

; and

an engaging means joined to said shank and projecting laterally beyond the periphery of said shank.

7. The absorbent article of claim 6, further comprising a complementary loop fastening material comprising at least one fibrous element, said loop fastening material being joined to said outer cover such that at least one of said prongs of said fastening system is capable of mechanically entangling said fibrous element.

8. The absorbent article of claim 6, further comprising a tape having a first end and a second end, said first end being joined to said outer cover and said fastening system being joined to said second end.

9. The absorbent article of claim 8, further comprising a complementary loop fastening material comprising at least one fibrous element, said loop fastening material being joined to said outer cover such that at least one of said prongs of said fastening system is capable of mechanically entangling said fibrous element.

10. An absorbent article comprising:

an outer cover comprising a liquid pervious topsheet and a liquid impervious backsheet joined to said topsheet;

an absorbent core positioned between said topsheet and said backsheet; and

a fastening system joined to said outer cover, said fastening system comprising;

a substrate; and

a multiplicity of prongs, each said prong comprising;

a shank joined to said substrate at a base, said shank having a proximal end contiguous with said base and projecting outwardly from said substrate, said shank having a leading angle and a trailing angle, said leading angle being substantially different from said trailing angle, said shank being nonperpendicularly oriented relative to the plane of said substrate, said shank further having an azimuthal angle between about 20° and

about 160°

; and

an engaging means joined to said shank and projecting laterally beyond the periphery of said shank.

11. The absorbent article of claim 10 wherein said shank has an azimuthal angle ranging from about 45°

to about 135°

.

12. The absorbent article of claim 10 wherein said shank has an azimuthal angle ranging from about 60°

to about 120°

.

13. The absorbent article of claim 10 wherein said shank has an azimuthal angle of about 90°

.

14. The absorbent article of claim 10 wherein said substrate of said fastening system comprises at least a portion of said outer cover.

15. The absorbent article of claim 10 additionally comprising a pair of tapes, each of said tapes comprising a first end and a second end, said first end being joined to said outer cover and said second end having said fastening system joined thereto.

16. The absorbent article of claim 15 wherein said shank has an azimuthal angle ranging from about 45°

to about 135°

.

17. The absorbent article of claim 15 wherein said shank has an azimuthal angle ranging from about 60°

to about 120°

.

18. The absorbent article of claim 15 wherein said shank has an azimuthal angle of about 90°

.

19. The absorbent article of claim 15 wherein at least a portion of said second end of each of said tapes forms said substrate of said fastening system.