US5556618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antibacterial electret material
Assignee: Toray Industries Inc
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Filing: 1993-01-08
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Granted: 1996-09-17
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Expires: 2013-01-08
Abstract
Abstract An antibacterial electret material which consists of a synthesized organic polymer having a volume resistivity of not less than 10 13 Ω·cm and containing 0.01 to 2% by weight of one kind of electret stabilizer selected from the group composed of a hindered amine compound, a nitrogen-containing hindered phenol compound, a metallic salt hindered phenol compound, a phenol compound, a sulfur compound and a phosphorus compound and 0.1 to 4% by weight of metal ion-containing inorganic compound, and which has a surface density of charge of not less than 1×10 -10 coulomb/cm 2 .
Inventors
- 👤 Katsutoshi Ando
- 👤 Masanori Takahashi
- 👤 Goro Kondou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:09
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; H01G7/021; H01G7/023
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
An antibacterial electret material comprising a synthetic organic polymer having a volume resistivity of 10 13 Ω·cm or above mixed with 0.01 to 2% by weight of at least one electret stabilizer selected from the group consisting of a hindered amine compound, a nitrogenous hindered phenol compound, a metallic salt hindered phenol compound, a phenol compound, a sulfur compound and a phosphorus compound and 0.1 to 4% by weight of an antibacterial metal-ion-containing inorganic compound selected from the group consisting of a metal-ion-containing zeolite; a metal-ion-containing soluble glass and a metal-ion-containing zirconium phosphate, whereby antibacterial activity is increased as a result of the presence of said antibacterial metal-ion-containing compound, in comparison to an otherwise similar material which contains no antibacterial metal-ion-containing compound, said antibacterial electret material having a surface charge density of 1×10 -10 C/cm 2 or above.
Claim 2
Dependent Claim
138 words
An antibacterial electret material comprising a synthetic organic polymer having a volume resistivity of 10 13 Ω·cm or above mixed with 0.01 to 2% by weight of at least one electret stabilizer selected from the group consisting of a hindered amine compound, a nitrogenous hindered phenol compound, a metallic salt hindered phenol compound, a phenol compound, a sulfur compound and a phosphorus compound and 0.1 to 4% by weight of an antibacterial metal-ion-containing inorganic compound selected from the group consisting of a metal-ion-containing zeolite; a metal-ion-containing soluble glass and a metal-ion-containing zirconium phosphate, whereby antibacterial activity is increased as a result of the presence of said antibacterial metal-ion-containing compound, in comparison to an otherwise similar material which contains no antibacterial metal-ion-containing compound, said antibacterial electret material having a surface charge density of 1×10 -10 C/cm 2 or above.
Claim 3
Dependent Claim
27 words
An antibacterial electret material according to claim 1, wherein said synthetic organic polymer is an olefin polymer having a volume resistivity of 10 15 Ω·cm or above.
Claim 4
Dependent Claim
59 words
An antibacterial electret material according to claim 1, wherein said electret stabilizer comprises at least two compounds selected from the group consisting of a hindered amine compound, a nitrogenous hindered phenol compound, a metallic salt hindered phenol compound, a phenol compound, a sulfur compound and a phosphorus compound and the total content thereof is 0.01 to 0.2% by weight.
Claim 5
Dependent Claim
20 words
An antibacterial electret material according to claim 1, wherein said metal-ion-containing inorganic compound comprises a zeolite containing a silver ion.
Claim 6
Dependent Claim
34 words
An antibacterial electret material according to claim 1, wherein said metal-ion-containing inorganic compound contains a metal ion selected from the group consisting of silver, copper, zinc, mercury, tin, lead, bismuth, chromium and thallium ions.
Claim 7
Dependent Claim
21 words
An antibacterial electret material according to claim 1, wherein said metal-ion-containing inorganic compound comprises a soluble glass containing a silver ion.
Claim 8
Dependent Claim
28 words
An antibacterial electret material according to claim 1, whereon said metal-ion-containing inorganic compound comprises a zeolite containing a silver ion and a soluble glass containing a silver ion.
Claim 9
Dependent Claim
20 words
An antibacterial electret material according to claim 1, wherein said metal-ion-containing inorganic compound comprises zirconium phosphate containing a silver ion.
Claim 10
Dependent Claim
16 words
An antibacterial electret material according to claim 1, which is in the form of a fiber.
Claim 11
Dependent Claim
17 words
An antibacterial electret material according to claim 1, which is in the form of a nonwoven fabric.
Claim 12
Dependent Claim
16 words
An antibacterial electret material according to claim 1, which is in the form of a film.
Claim 13
Dependent Claim
15 words
An antibacterial electret material according to claim 1, which is in the form of paper.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-17 | 2000-03-18 | 2000-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-17 | 2004-03-18 | 2004-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-17 | 2008-03-18 | 2008-09-17 | $7700.00 | Window Closed / Lapsed |