US4692371A
Expired / Lapsed
US
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High temperature method of making elastomeric materials and materials obtained thereby
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1985-07-30
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Granted: 1987-09-08
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Expires: 2005-07-30
Abstract
Abstract Elastomeric materials such as elastomeric nonwoven webs of elastomeric meltblown fibers, elastomeric films or elastomeric molded materials are attained by forming, e.g., extruding or meltblowing, a polystyrenic poly(ethylenebutylene) thermoplastic block copolymer at elevated temperatures of at least about 290 degrees Centigrade, e.g., from about 290 degrees Centigrade to 345 degrees Centigrade. The resulting products retain good elastic elongation and strength properties. In the case of elastomeric nonwoven webs of elastomeric fibers, other fibers such as cellulosic fibers, e.g., cotton fibers, may be combined with the elastomeric fibers by known methods to provide an elastomeric nonwoven web comprising a blend of the elastomeric fibers with other fibers. Such web or film materials are useful generally in applications utilizing webs or sheets of elastic fabrics or the like, for example, in making composite materials in which an elastic layer of material is bonded to a gatherable web.
Inventors
- 👤 Michael T. Morman
- 👤 Tony J. Wisneski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/42; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; Y; Y10; Y10S; Y10S264/00; Y10S264/15; Y10T; Y10T442/00; Y10T442/60; Y10T442/601; Y10T442/602; Y10T442/68; Y10T442/697
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
52 words
A nonwoven elastomeric material comprising a coherent matrix of entangled elastomeric fibers having a diameter of from about 0.5 micron to about 100 microns, said fibers consisting essentially of an A-R-A' block copolymer where A and A' are each a thermoplastic endblock containing a styrenic moiety and B is a poly(ethylene-butylene) midblock.
Claim 2
Dependent Claim
52 words
A nonwoven elastomeric material comprising a coherent matrix of entangled elastomeric fibers having a diameter of from about 0.5 micron to about 100 microns, said fibers consisting essentially of an A-R-A' block copolymer where A and A' are each a thermoplastic endblock containing a styrenic moiety and B is a poly(ethylene-butylene) midblock.
Claim 3
Dependent Claim
24 words
The nonwoven elastomeric material of claim 1, wherein each of A and A' is selected from the group consisting of polystyrene and polystyrene homologs.
Claim 4
Dependent Claim
24 words
The nonwoven elastomeric material of claim 1, wherein each of A and A' is selected from the group consisting of polystyrene and poly(alpha methylstyrene).
Claim 5
Dependent Claim
22 words
The nonwoven elastomeric material of claims 1 or 2, wherein the fibers are essentially continuous about 1 micron to about 50 microns.
Claim 6
Dependent Claim
16 words
The nonwoven elastomeric material of claims 1 or 2, wherein the fibers are essentially continuous fibers.
Claim 7
Dependent Claim
41 words
The nonwoven elastomeric material of claim 2, wherein the sum of the molecular weight of A with the molecular weight of A' comprises from about 14 percent to about 29 percent, by weight, of the molecular weight of A-B-A' block copolymer.
Claim 8
Dependent Claim
88 words
A nonwoven elastomeric material comprising a coherent matrix of entangled elastomeric fibers having a diameter of from about 0.5 micron to about 100 microns, said fibers consisting essentially of an A-B-A' block copolymer where A and A' are each a thermoplastic endblock containing a styrenic moiety and B is a poly(ethylene-butylene) midblock and where the sum of the molecular weight of A with the molecular weight of A' comprises from about 14 percent to about 29 percent, by weight, of the molecular weight of the A-B-A' block copolymer.
Claim 9
Dependent Claim
88 words
A nonwoven elastomeric material comprising a coherent matrix of entangled elastomeric fibers having a diameter of from about 0.5 micron to about 100 microns, said fibers consisting essentially of an A-B-A' block copolymer where A and A' are each a thermoplastic endblock containing a styrenic moiety and B is a poly(ethylene-butylene) midblock and where the sum of the molecular weight of A with the molecular weight of A' comprises from about 14 percent to about 29 percent, by weight, of the molecular weight of the A-B-A' block copolymer.
Claim 10
Dependent Claim
24 words
The nonwoven elastomeric material of claim 7, wherein each of A and A' is selected from the group consisting of polystyrene and polystyrene homologs.
Claim 11
Dependent Claim
25 words
The nonwoven elastomeric material of claim 7, wherein each of A and A' is selected from the group consisting of polystyrene and and poly(alpha methylstyrene).
Claim 12
Dependent Claim
24 words
The nonwoven elastomeric material of claim 8 or 9, wherein the fibers have a diameter of from about 1 micron to about 50 microns.
Claim 13
Dependent Claim
16 words
The nonwoven elastomeric material of claims 8 or 9, wherein the fibers are essentially continuous fibers.
Claim 14
Dependent Claim
39 words
The nonwoven elastomeric material of claims 8 or 9, wherein the sum of the molecular weight of A with the molecular weight of A' comprises about 14 percent, by weight, of the molecular weight of the A-B-A' block copolymer.
References Cited (Backward Citations)
GB1175192A
Cited
US3849241A
Cited
US3576913A
Cited
US3845380A
Cited
US4100324A
Cited
US4305990A
Cited
JPS54103466A
Cited
US4296163A
Cited
US4259220A
Cited
US4418123A
Cited
JPS5590663A
Cited
US4323534A
Cited
US4450026A
Cited
US4355425A
Cited
US4413623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |