US5491025A
Expired / Lapsed
US
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Abrasive filaments comprising abrasive-filled thermoplastic elastomer
Assignee: 3M Co
•
Filing: 1995-05-15
•
Granted: 1996-02-13
•
Expires: 2015-05-15
Abstract
Abstract An abrasive filament, including a thermoplastic elastomer having abrasive particles dispersed and adhered therein, exhibits improved life over previously known abrasive-filled polymeric filaments. Methods of making abrasive filaments of the invention, articles including the abrasive filaments, and methods of abrading surfaces using the abrasive articles of the invention are also described.
Inventors
- 👤 Richard M. Pihl
- 👤 Duane J. Hayes
- 👤 Loren L. Barber, Jr.
- 👤 Dennis G. Welygan
- 👤 R. Eugene Hardwick
- 👤 Ronald O. Zemke, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:43
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/416; A01D34/4168; A46; A46D; A46D1/00; B; B24; B24D; B24D13/00; B24D13/02; B24D13/10; B24D3/00; B24D3/02; B24D3/20; B24D3/28; D; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34; D01F; D01F8/00; D01F8/04; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/404; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2927; Y10T428/2929; Y10T428/2931
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
114 words
An extruded, unoriented abrasive filament comprising (a) said first elongate filament component having a continuous surface throughout its length and comprising a first hardened organic polymeric material; and (b) a second elongate filament component coterminous with said first elongate filament component, said second elongate filament component comprising of a second hardened organic polymeric material in melt fusion adherent contact with said first elongate filament component along said continuous surface, the second hardened organic polymeric material being the same or different than the first hardened organic polymeric material, wherein at least one of the first and second hardened organic polymeric materials comprises a thermoplastic elastomer, the thermoplastic elastomer having abrasive particles dispersed and adhered therein.
Claim 2
Dependent Claim
114 words
An extruded, unoriented abrasive filament comprising (a) said first elongate filament component having a continuous surface throughout its length and comprising a first hardened organic polymeric material; and (b) a second elongate filament component coterminous with said first elongate filament component, said second elongate filament component comprising of a second hardened organic polymeric material in melt fusion adherent contact with said first elongate filament component along said continuous surface, the second hardened organic polymeric material being the same or different than the first hardened organic polymeric material, wherein at least one of the first and second hardened organic polymeric materials comprises a thermoplastic elastomer, the thermoplastic elastomer having abrasive particles dispersed and adhered therein.
Claim 3
Dependent Claim
14 words
An abrasive filament in accordance with claim 1 wherein said thermoplastic elastomer is segmented.
Claim 4
Dependent Claim
29 words
An abrasive filament in accordance with claim 2 wherein said segmented thermoplastic elastomer is selected from the group consisting of segmented polyesters, segmented polyurethanes, segmented polyamides, and mixtures thereof.
Claim 5
Dependent Claim
16 words
An abrasive filament in accordance with claim 1 wherein said abrasive particles are individual abrasive grains.
Claim 6
Dependent Claim
46 words
An abrasive filament in accordance with claim 4 wherein said individual abrasive grains are selected from the group consisting of silicone carbide, aluminum oxide, alumina zirconia, cubic boron nitride, garnet, pumice, sand, emery, mica, corundum, quartz, diamond, boron carbide, alpha alumina-based ceramic material, and combinations thereof.
Claim 7
Dependent Claim
44 words
An abrasive filament in accordance with claim 4, wherein said abrasive grains are selected from the group consisting of aluminum oxide, silicone carbide, and alpha alumina-based ceramic materials, said first thermoplastic elastomer comprises from about 0.1 to about 65 weight percent of abrasive grains.
Claim 8
Dependent Claim
55 words
An abrasive filament in accordance with claim 1 having a filament cross sectional area, wherein said first elongate filament component comprises a core having a core cross-sectional area and said first hardened organic polymeric material comprises a first thermoplastic elastomer, and wherein said second elongate filament component comprises a sheath having a sheath cross-sectional area.
Claim 9
Dependent Claim
42 words
An abrasive filament in accordance with claim 1, wherein said first elongate filament component comprises a core and said first hardened organic polymeric material comprises a polymer selected from the group consisting of segmented polyesters, segmented polyurethanes, segmented polyamides and mixtures thereof.
Claim 10
Dependent Claim
31 words
An abrasive filament in accordance with claim 7, wherein said second hardened organic polymeric material comprises a second thermoplastic elastomer which is the same or different from said first thermoplastic elastomer.
Claim 11
Dependent Claim
40 words
An abrasive filament in accordance with claim 9, wherein said first thermoplastic elastomer is different from said second thermoplastic elastomer and each thermoplastic elastomer is selected from the group consisting of segmented polyesters, segmented polyurethanes, segmented polyamides and mixtures thereof.
Claim 12
Dependent Claim
28 words
An abrasive filament in accordance with claim 1, wherein the first hardened organic polymeric material comprising abrasive particles and said first thermoplastic elastomer further includes a coupling agent.
Claim 13
Dependent Claim
15 words
An abrasive element in accordance with claim 11 wherein the coupling agent is a titanate.
Claim 14
Dependent Claim
25 words
An abrasive filament in accordance with claim 1 wherein said first thermoplastic elastomer has a Shore D durometer hardness ranging from about 30 to 90.
Claim 15
Dependent Claim
49 words
An abrasive filament in accordance with claim 7 wherein the ratio of the cross sectional area of the sheath to the cross sectional area of the core ranges from about 1:1 to about 20:1, the cross sectional areas defined by a plane perpendicular to the abrasive filament major axis.
Claim 16
Dependent Claim
45 words
An abrasive filament in accordance with claim 7 wherein the cross sectional area of the sheath is at least about 40% of the cross sectional area of the abrasive filament, the cross sectional area defined by a plane perpendicular to the abrasive filament major axis.
Claim 17
Dependent Claim
71 words
An abrasive filament comprising: (a) a core having a continuous surface throughout its length and consisting essentially of a first thermoplastic elastomer, the first thermoplastic elastomer having abrasive particles dispersed and adhered therein; and (b) a sheath coterminous with the core, the sheath consisting essentially of a blend of a second thermoplastic elastomer and a thermoplastic polymer, the blend in melt fusion adherent contact with the core along the continuous surface.
Claim 18
Dependent Claim
71 words
An abrasive filament comprising: (a) a core having a continuous surface throughout its length and consisting essentially of a first thermoplastic elastomer, the first thermoplastic elastomer having abrasive particles dispersed and adhered therein; and (b) a sheath coterminous with the core, the sheath consisting essentially of a blend of a second thermoplastic elastomer and a thermoplastic polymer, the blend in melt fusion adherent contact with the core along the continuous surface.
Claim 19
Dependent Claim
29 words
Abrasive filament in accordance with claim 16 wherein the first thermoplastic elastomer is a first segmented thermoplastic elastomer, and the second thermoplastic elastomer is a second segmented thermoplastic elastomer.
Claim 20
Dependent Claim
38 words
Abrasive filament in accordance with claim 17 wherein the first and the second segmented thermoplastic elastomers are independently selected from the group consisting of segmented polyester thermoplastic elastomers, segmented polyurethane thermoplastic elastomers, and a segmented polyamide thermoplastic elastomers.
Claim 21
Dependent Claim
70 words
An abrasive filament comprising: (a) a core having a continuous surface throughout its length and consisting essentially of a blend of a first thermoplastic elastomer and a thermoplastic polymer; and (b) a sheath coterminous with the core, the sheath consisting essentially of a second thermoplastic elastomer polymer in melt fusion adherent contact with the core along the continuous surface, the second thermoplastic elastomer having abrasive particles dispersed and adhered therein.
Claim 22
Dependent Claim
70 words
An abrasive filament comprising: (a) a core having a continuous surface throughout its length and consisting essentially of a blend of a first thermoplastic elastomer and a thermoplastic polymer; and (b) a sheath coterminous with the core, the sheath consisting essentially of a second thermoplastic elastomer polymer in melt fusion adherent contact with the core along the continuous surface, the second thermoplastic elastomer having abrasive particles dispersed and adhered therein.
Claim 23
Dependent Claim
29 words
Abrasive filament in accordance with claim 19 wherein the first thermoplastic elastomer is a first segmented thermoplastic elastomer, and the second thermoplastic elastomer is a second segmented thermoplastic elastomers.
Claim 24
Dependent Claim
37 words
Abrasive filament in accordance with claim 20 wherein the first and the second segmented thermoplastic elastomers are independently selected from the group consisting of segmented polyester thermoplastic elastomers, segmented polyurethane thermoplastic elastomers, and segmented polyamide thermoplastic elastomers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |