US5169706A
Expired / Lapsed
US
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Low stress relaxation composite elastic material
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1990-01-10
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Granted: 1992-12-08
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Expires: 2010-01-10
Abstract
Abstract A composite elastic material having a stress relaxation of less than about 30 percent is composed of at least one elastic sheet formed from a blend of (1) a styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer or a mixture of styrene-poly(ethylene-propylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers, and (2) a tackifying resin. The blend may also include a polyolefin and/or an extending oil. The elastic sheet is joined to at least one gatherable layer at spaced-apart locations in which the gatherable layer is gathered between the spaced-apart locations so that the composite material is elastic.
Inventors
- 👤 L. Warren Collier, IV
- 👤 Steven R. Stopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:30
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/04; A; A41; A41D; A41D31/00; A41D31/04; A41D31/18; A41D31/185; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/086; B32B27/00; B32B27/32; B32B38/00; B32B38/0012; B32B5/022; B32B7/00; B32B7/04; B32B7/12; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F2013/15284; A61F2013/15292; A61F2013/15325; A61F13/15577; A61F2013/15821; A61F2013/15861; A61F2013/1591; A61F2013/15934; A61F2013/15967; A61F2013/15991; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/08; B32B2270/00; B32B2274/00; B32B2307/00; B32B2307/50; B32B2307/51; B32B2323/00; B32B2323/04; B32B2323/10; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24446; Y10T428/24479; Y10T428/24595; Y10T428/24603; Y10T428/24612; Y10T428/24628; Y10T428/24669; Y10T428/24686; Y10T428/24694; Y10T428/24711; Y10T428/24727; Y10T428/24802; Y10T428/24826; Y10T428/25; Y10T428/253; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/621; Y10T442/659; Y10T442/66
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
78 words
A composite elastic material having a stress relaxation of less than about 30 percent comprising: at least one elastic sheet formed from a blend comprising: an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers; and a tackifying resin; and at least one gatherable layer joined at spaced apart locations to the elastic sheet, and wherein the gatherable layer is gathered between the spaced-apart locations.
Claim 2
Dependent Claim
78 words
A composite elastic material having a stress relaxation of less than about 30 percent comprising: at least one elastic sheet formed from a blend comprising: an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers; and a tackifying resin; and at least one gatherable layer joined at spaced apart locations to the elastic sheet, and wherein the gatherable layer is gathered between the spaced-apart locations.
Claim 3
Dependent Claim
44 words
The composite elastic material of claim 1, wherein the styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer has the formula: ##STR3## wherein m is an integer from about 38 to 337; and n is an integer from about 500 to 1860; and R is a benzyl group.
Claim 4
Dependent Claim
32 words
The composite elastic material of claim 2, wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has an average molecular weight ratio of polystyrene endblocks to poly(ethylene-propylene) midblocks ranging from about 10:90 to about 25:75.
Claim 5
Dependent Claim
44 words
The composite elastic material of claim 1 wherein the elastic sheet formed from a blend comprising a mixture of styrene-poly(ethylene-prolypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers contains at least about 40 parts by weight styrene-poly(ethylene-polypropylene)-styrene elastomric block copolymer per 100 parts of elastomeric block copolymer.
Claim 6
Dependent Claim
24 words
The composite elastic material of claim 1, wherein the tackifying resin is selected from the group including hydrogenated hydrocarbon resins and terpene hydrocarbon resins.
Claim 7
Dependent Claim
21 words
The composite elastic material of claim 1, wherein the elastic sheet is formed from a blend further comprising a polyolefin resin.
Claim 8
Dependent Claim
29 words
The composite elastic material of claim 6, wherein the polyolefin resin is selected from the group including polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, butylene copolymers and mixtures thereof.
Claim 9
Dependent Claim
15 words
The composite elastic material of claim 6, wherein the blend further includes an extending oil.
Claim 10
Dependent Claim
63 words
The composite elastic material of claim 8, wherein the blend comprises from about 50 to about 80 percent, by weight, of an elastomeric polymer, from about 15 to about 30 percent, by weight, of a tackifying resin, from about 3 to about 25 percent, by weight, of a polyolefin, and from about 0 to about 15 percent, by weight, of an extending oil.
Claim 11
Dependent Claim
19 words
The composite elastic material of claim 1, wherein the elastic sheet is an elastic nonwoven web of meltblown fibers.
Claim 12
Dependent Claim
15 words
The composite elastic material of claim 10, wherein the web of meltblown fibers includes microfibers.
Claim 13
Dependent Claim
17 words
The composite elastic material of claim 1 wherein the gatherable layer is a nonwoven web of fibers.
Claim 14
Dependent Claim
56 words
The composite elastic material of claim 12 wherein the gatherable layer is selected from the group consisting of a web of spunbonded fibers, a web of meltblown fibers, a bonded carded web of fibers, a multi-layer material including at least one of the webs of spunbonded fibers, meltblown fibers, and a bonded carded web of fibers.
Claim 15
Dependent Claim
31 words
The composite elastic material of claim 12, wherein the gatherable layer comprises a nonwoven web of fibers formed from a polymer selected from the group consisting of polyolefins, polyesters, and polyamides.
Claim 16
Dependent Claim
38 words
The composite elastic material of claim 14, wherein the nonwoven web of fibers is formed from a polyolefin selected from the group consisting of one or more of polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, and butylene copolymers.
Claim 17
Dependent Claim
40 words
The composite elastic material of claim 12, wherein the gatherable layer is a nonwoven web comprising a mixture of fibers and one or more other materials selected from the group consisting of wood pulp, staple fibers, particulates and super-absorbent materials.
Claim 18
Dependent Claim
83 words
A composite elastic material having a stress relaxation of less than about 30 percent comprising: at least one elastic sheet formed from a blend comprising: an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers; a polyolefin; a tackifying resin; and an extending oil, and at least one gatherable layer joined to the elastic sheet at spaced apart locations, and wherein the gatherable layer is gathered between the spaced-apart locations.
Claim 19
Dependent Claim
83 words
A composite elastic material having a stress relaxation of less than about 30 percent comprising: at least one elastic sheet formed from a blend comprising: an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers; a polyolefin; a tackifying resin; and an extending oil, and at least one gatherable layer joined to the elastic sheet at spaced apart locations, and wherein the gatherable layer is gathered between the spaced-apart locations.
Claim 20
Dependent Claim
43 words
The composite elastic material of claim 17, wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR4## wherein m is an integer from about 38 to 337; and n is an integer from about 500 to 1860; and R is a benzyl group.
Claim 21
Dependent Claim
32 words
The composite elastic material of claim 18, wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has an average molecular weight ratio of polystyrene endblocks to poly(ethylene-propylene) midblocks ranging from about 10:90 to about 25:75.
Claim 22
Dependent Claim
36 words
The elastic nonwoven web of claim 17 wherein the mixture of styrene-poly(ethylene-polypropylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers contains at least about 40 parts by weight styrene-poly(ethylene-polypropylene)-styrene elastomeric block copolymer per 100 parts of elastomeric block copolymer.
Claim 23
Dependent Claim
28 words
The composite elastic material of claim 17, wherein the polyolefin is selected from the group including polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, butylene copolymers and mixtures thereof.
Claim 24
Dependent Claim
24 words
The composite elastic material of claim 17, wherein the tackifying resin is selected from the group including hydrogenated hydrocarbon resins and terpene hydrocarbon resins.
Claim 25
Dependent Claim
14 words
The composite elastomeric material of claim 17, wherein the extending oil is mineral oil.
Claim 26
Dependent Claim
63 words
The composite elastic material of claim 17, wherein the blend comprises from about 0 to about 80 percent, by weight, of an elastomeric polymer, from about 15 to about 30 percent, by weight, of a tackifying resin, from about 3 to about 25 percent, by weight, of a polyolefin, and from about 0 to about 15 percent, by weight, of an extending oil.
Claim 27
Dependent Claim
19 words
The composite elastic material of claim 17, wherein the elastic sheet is an elastic nonwoven web of meltblown fibers.
Claim 28
Dependent Claim
13 words
The composite elastic material of claim 25, wherein the meltblown fibers include microfibers.
Claim 29
Dependent Claim
17 words
The composite elastic material of claim 17, wherein the gatherable layer is a nonwoven web of fibers.
Claim 30
Dependent Claim
55 words
The composite elastic material of claim 27, wherein the gatherable layer is selected from the group consisting of a web of spunbonded fibers, a web of meltblown fibers, a bonded carded web of fibers, a multi-layer material including at least one of the webs of spunbonded fibers, meltblown fibers, and bonded carded web of fibers.
Claim 31
Dependent Claim
15 words
The composite elastic material of claim 28, wherein the meltblown web of fibers includes microfibers.
Claim 32
Dependent Claim
31 words
The composite elastic material of claim 27, wherein the gatherable layer comprises a nonwoven web of fibers formed from a polymer selected from the group consisting of polylofens, polyesters, and polyamides.
Claim 33
Dependent Claim
41 words
The composite elastic material of claim 30, wherein the gatherable later comprises a nonwoven web of fibers formed from a polyolefin selected from the group consisting of one or more of polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, and butylene copolymers.
Claim 34
Dependent Claim
40 words
The composite elastic material of claim 17, wherein the gatherable layer is a nonwoven web comprising a mixture of fibers and one or more other materials selected from the group consisting of wood pulp, staple fibers, particulates and super-absorbent materials.
References Cited (Backward Citations)
US4892903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |