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US5321071A
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Short fiber-containing polymer composition and method for controlling electrical resistance of the polymer composition
Assignee: Osaka Gas Chemicals Co Ltd
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Filing: 1992-10-27
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Granted: 1994-06-14
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Expires: 2012-10-27
Abstract
Abstract The present invention provides a short-fiber containing composition inhibited from electrostatic charging and having practical insulating properties. This composition has a volume resistivity of 105-1013 OMEGA cm and comprises 10-40 parts by weight of at least one kind of short fibers having a volume resistivity of 10-1-103 OMEGA cm and 90-60 parts by weight of a polymer or comprises 10-40 parts by weight of a mixture comprising at least one kind of short fibers having a volume resistivity of less than 10-1 OMEGA cm and at least one kind of short fibers having a volume resistivity of 10-1 OMEGA cm or more and 90-60 parts by weight of a polymer. A method for controlling the polymer composition to 105-1013 OMEGA cm in volume resistivity is also provided.
Inventors
- 👤 Eiji Fujisawa
- 👤 Yasunobu Isobe
- 👤 Hiroaki Shono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; H01B1/24; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B3/42; H01B3/428; H01B3/44
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
56 words
A carbon fiber-containing polymer composition having a volume resistivity of 10 5 -10 13 Ωcm which comprises 10-40 parts by weight of carbon fibers having a volume resistivity of 10 -1 10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm, and 90-60 parts by weight of a polymer.
Claim 2
Dependent Claim
56 words
A carbon fiber-containing polymer composition having a volume resistivity of 10 5 -10 13 Ωcm which comprises 10-40 parts by weight of carbon fibers having a volume resistivity of 10 -1 10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm, and 90-60 parts by weight of a polymer.
Claim 3
Dependent Claim
86 words
A carbon fiber-containing polymer composition having a volume resistivity of 10 5 10 13 Ωcm which comprises 10-40 parts by weight of a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm and carbon fibers having a volume resistivity of 10 -1 10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm, and 90-60 parts by weight of a polymer.
Claim 4
Dependent Claim
86 words
A carbon fiber-containing polymer composition having a volume resistivity of 10 5 10 13 Ωcm which comprises 10-40 parts by weight of a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm and carbon fibers having a volume resistivity of 10 -1 10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm, and 90-60 parts by weight of a polymer.
Claim 5
Dependent Claim
20 words
A short fiber-containing composition according to claim 1 or 2, wherein the short fibers are chopped strands of carbon fibers.
Claim 6
Dependent Claim
17 words
A short fiber-containing composition according to claim 1 or 2, wherein the polymer is a thermoplastic resin.
Claim 7
Independent Claim
49 words
A method for controlling the volume resistivity of a polymer composition to 10 5 -10 13 Ωcm which comprises incorporating carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm into a polymer.
Claim 8
Independent Claim
49 words
A method for controlling the volume resistivity of a polymer composition to 10 5 -10 13 Ωcm which comprises incorporating carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm into a polymer.
Claim 9
Independent Claim
79 words
A method for controlling the volume resistivity of a polymer composition to 10 5 -10 13 Ωcm which comprises incorporating into a polymer a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm and carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm.
Claim 10
Independent Claim
79 words
A method for controlling the volume resistivity of a polymer composition to 10 5 -10 13 Ωcm which comprises incorporating into a polymer a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm and carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm.
Claim 11
Independent Claim
58 words
A method for controlling the volume resistivity of a polymer composition to a specific value in the range of 10 5 -10 13 Ωcm which comprises incorporating carbon fibers having a volume resistivity of less than 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm into a polymer.
Claim 12
Independent Claim
58 words
A method for controlling the volume resistivity of a polymer composition to a specific value in the range of 10 5 -10 13 Ωcm which comprises incorporating carbon fibers having a volume resistivity of less than 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm into a polymer.
Claim 13
Independent Claim
86 words
A method for controlling the volume resistivity of a polymer composition to a specific value in the range of 10 5 -10 13 Ωcm which comprises incorporating into a polymer a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μmm-5 cm and carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm.
Claim 14
Independent Claim
86 words
A method for controlling the volume resistivity of a polymer composition to a specific value in the range of 10 5 -10 13 Ωcm which comprises incorporating into a polymer a mixture comprising carbon fibers having a volume resistivity of less than 10 -1 Ωcm and having a diameter of 3-25 μm and a length of 10 μmm-5 cm and carbon fibers having a volume resistivity of 10 -1 -10 3 Ωcm and having a diameter of 3-25 μm and a length of 10 μm-5 cm.
Claim 15
Independent Claim
19 words
A method according to any one of claims 5-8, wherein the short fibers are chopped strands of carbon fibers.
Claim 16
Independent Claim
16 words
A method according to any one of claims 5-8, wherein the polymer is a thermoplastic resin.
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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) | 1997-06-13 | 1997-12-13 | 1998-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-13 | 2001-12-13 | 2002-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-13 | 2005-12-13 | 2006-06-14 | $7700.00 | Window Closed / Lapsed |