Web materials exhibiting elastic-like behavior
First Claim
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1. A web material comprising:
- at least a first region and a second region being comprised of the same material composition, said first region undergoing a substantially molecular-level deformation and said second region initially undergoing a substantially geometric deformation when said web material is subjected to an applied elongation along at least one axis.
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Abstract
A web material which exhibits an elastic-like behavior along at least one axis when subjected to an applied and subsequently released elongation. The web material includes a strainable network having at least two visually distinct regions of the same material composition. The first region undergoes a molecular-level deformation and the second region initially undergoes a substantially geometric deformation when the web material is subjected to an applied elongation in a direction substantially parallel to the axis of elongation.
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Citations
98 Claims
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1. A web material comprising:
- at least a first region and a second region being comprised of the same material composition, said first region undergoing a substantially molecular-level deformation and said second region initially undergoing a substantially geometric deformation when said web material is subjected to an applied elongation along at least one axis.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A web material exhibiting an elastic-like behavior along at least one axis, said web material comprising:
- at least a first region and a second region, said first region and said second region being comprised of the same material composition and each having an untensioned projected pathlength, said first region undergoing a substantially molecular-level deformation and said second region initially undergoing a substantially geometric deformation when said web material is subjected to an applied elongation in a direction substantially parallel to said axis, said first region and said second region substantially returning to their untensioned projected pathlength when said applied elongation is released.
- View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A web material exhibiting at least two-stages of resistive forces to an applied axial elongation along at least one axis when subjected to the applied axial elongation in a direction substantially parallel to said axis, said web material comprising:
- a strainable network of visually distinct regions, said strainable network including at least a first region and a second region, said first region and said second region being comprised of the same material composition and each having a surface-pathlength, said surface-pathlength of said first region being less than that of said second region as measured parallel to said axis while said web material is in an untensioned condition, said web material exhibiting a Poisson lateral contraction effect less than about 0.4 at 20 percent elongation as measured perpendicular to said axis.
- View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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72. A web material exhibiting at least two-stages of resistive forces to an applied axial elongation, D, along at least one axis when subjected to the applied axial elongation along said axis, said web material comprising:
- a strainable network of visually distinct regions, said strainable network including at least a first region and a second region, said first region having a first surface-pathlength, L1, as measured parallel to said axis while said web material is in an untensioned condition, said second region having a second surface-pathlength, L2, as measured parallel to said axis while said web material is in an untensioned condition, said first surface-pathlength, L1, being less than said second surface-pathlength, L2, said first region producing by itself a resistive force, P1, in response to an applied axial elongation, D, said second region producing by itself a resistive force, P2, in response to said applied axial elongation, D, said resistive force P1 being substantially greater than said resistive force P2 when (L1+D) is less than L2.
- View Dependent Claims (73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83)
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84. A web material exhibiting at least two significantly different stages of resistive forces to an applied axial elongation along at least one axis when subjected to the applied elongation in a direction parallel to said axis, said web material comprising:
- strainable network including at least two visually distinct regions, one of said regions being configured so that it will exhibit a resistive force in response to said applied axial elongation in a direction parallel to said axis before a substantial portion of the other of said regions develops a significant resistive force to said applied axial elongation, at least one of said regions having a surface-pathlength which is greater than that of the other of said regions as measured parallel to said axis while said web material is in an untensioned condition, said region exhibiting said longer surface-pathlength including one or more rib-like elements, said web material exhibiting a first resistive force to the applied elongation until the elongation of said web material is great enough to cause a substantial portion of said region having a longer surface-pathlength to enter the plane of the applied axial elongation, whereupon said web material exhibits a second resistive force to further applied axial elongation, said web material exhibiting a total resistive force higher than the resistive force of said first region.
- View Dependent Claims (85, 86, 87, 88, 89, 90, 91, 92)
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93. A web material exhibiting an elastic-like behavior in response to an applied axial elongation along at least one axis thereof, said web material comprising:
- a strainable network having first and second regions formed of substantially the same material composition, said first region providing a first, elastic-like resistive force to said applied axial elongation, and said second region providing a second distinctive resistive force to further applied axial elongation, thereby providing at least two stages of resistive forces in use.
- View Dependent Claims (94, 95, 96, 97, 98)
Specification
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Current AssigneeThe Procter & Gamble Company
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Original AssigneeThe Procter & Gamble Company
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InventorsCurro, John J., Buell, Kenneth B., Chappell, Charles W., Mansfield, Michele A., Sorensen, Eugene R.
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Primary Examiner(s)Bell, James J.
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Application NumberUS08/203,087Time in Patent Office813 DaysField of Search428/152, 428/156, 428/167, 428/212, 428/910, 428/913, 604/358US Class Current428/152CPC Class CodesA61F 13/15707 Mechanical treatment, e.g. ...A61F 13/51104 the top sheet having a thre...A61F 13/514 Backsheet, i.e. the imperme...A61F 13/51466 providing stretchability wi...A61F 13/51476 being three-dimensional, e....A61F 13/51484 being inhomogeneous in the ...A61F 2013/51322 being elastomeric or stretc...A61F 2013/51429 being elastomeric or stretc...B29C 55/18 by squeezing between surfac...Y10S 428/91 Product with molecular orie...Y10S 428/913 Material designed to be res...Y10T 428/24446 Wrinkled, creased, crinkled...Y10T 428/24479 including variation in thic...Y10T 428/2457 Parallel ribs and/or groovesY10T 428/24942 including components having...
