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US4219602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive/antistatic sheeting
Assignee: Herculite Protective Fabrics Corp
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Filing: 1976-04-29
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Granted: 1980-08-26
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Expires: 1996-04-29
Abstract
Abstract A multi-layered sheeting material is disclosed whereby conductive properties are imparted to one surface and antistatic properties are imparted to the other. In a further embodiment, the sheeting material contains a reinforcing layer. This light-weight sheeting material may be used in applications whereby the accumulation of electrical charge may be dangerous, e.g. in the presence of volatile and flammable materials.
Inventors
- 👤 Christine Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:25
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/08; B32B13/00; B32B13/04; B32B13/12; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B2264/00; B32B2264/10; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/21; B32B2307/30; B32B2307/306; B32B2307/3065; Y; Y10; Y10S; Y10S428/00; Y10S428/907; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/30; Y10T428/31; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/162; Y10T442/164; Y10T442/169; Y10T442/20; Y10T442/2418; Y10T442/2426
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
116 words
A flexible sheeting having conductivity and a surface resistivity of less than 10 6 ohms on one surface thereof, comprising: a first layer of a rubber composition filled with from about 25 to about 40 percent by weight of an electrically conductive filler selected from the group consisting of carbon black, powdered metal and mixtures thereof, the percent by weight of said electrically conductive filler being based on the total weight of the rubber and the electrically conductive filler in said composition; and a second layer of a plastic film material which, prior to incorporation in said sheeting, has a surface resistivity of at least 10 6 ohms and which is bonded to said first layer.
Claim 2
Dependent Claim
116 words
A flexible sheeting having conductivity and a surface resistivity of less than 10 6 ohms on one surface thereof, comprising: a first layer of a rubber composition filled with from about 25 to about 40 percent by weight of an electrically conductive filler selected from the group consisting of carbon black, powdered metal and mixtures thereof, the percent by weight of said electrically conductive filler being based on the total weight of the rubber and the electrically conductive filler in said composition; and a second layer of a plastic film material which, prior to incorporation in said sheeting, has a surface resistivity of at least 10 6 ohms and which is bonded to said first layer.
Claim 3
Dependent Claim
27 words
The sheeting of claim 1, further comprising a third layer of a plastic film material bonded to said second layer on the side opposite said first layer.
Claim 4
Dependent Claim
17 words
The sheeting of claim 2, further comprising a cementing layer interposed between said second and third layers.
Claim 5
Dependent Claim
16 words
The sheeting of claim 2, further comprising a reinforcing element between said second and third layers.
Claim 6
Dependent Claim
13 words
The sheeting of claim 4, wherein said reinforcing element is a nylon scrim.
Claim 7
Dependent Claim
15 words
The sheeting of claim 2, wherein said second and third layers are films of polyvinylchloride.
Claim 8
Dependent Claim
14 words
The sheeting of claim 1, wherein said rubber composition is an acrylonitrile-butadiene rubber composition.
Claim 9
Dependent Claim
26 words
The sheeting of claim 1, wherein said sheeting further comprises an amount of a flame retardant agent sufficient to improve the flame retardancy of said sheeting.
Claim 10
Dependent Claim
13 words
The sheeting of claim 8, wherein said flame retardant agent is antimony oxide.
Claim 11
Dependent Claim
27 words
The sheeting of claim 1, wherein said sheeting further comprises an amount of antibacterial agent sufficient to improve the antibacterial activity of the surface of said sheeting.
Claim 12
Dependent Claim
12 words
The sheeting of claim 10, wherein said antibacterial agent is N-[(trichloromethyl) thio]-4-cyclohexene-1,2-dicarboximide.
Claim 13
Dependent Claim
49 words
The sheeting of claim 1, wherein the surface of said second layer opposite said first layer, which had a surface resistivity of over 10 11 ohms before incorporation into said sheeting, is antistatic and has a surface resistivity of less than 10 11 ohms after incorporation into said sheeting.
Claim 14
Dependent Claim
25 words
The sheeting of claim 12, wherein said surface resistivity of less than 10 11 ohms after incorporation into said sheeting is about 10 8 ohms.
Claim 15
Dependent Claim
44 words
The sheeting of claim 2, wherein the surface of said third layer opposite said second layer, which had a surface resistivity of over 10 11 ohms before incorporation into said sheeting, is antistatic and has a surface resistivity of less than 10 11 ohms.
Claim 16
Dependent Claim
20 words
The sheeting of claim 14, wherein said surface resistivity of less than 10 11 ohms is about 10 10 ohms.
Claim 17
Dependent Claim
20 words
The sheeting of claim 1, wherein said surface resistivity of less than 10 6 ohms is about 10 3 ohms.
Claim 18
Independent Claim
151 words
A method for producing a flexible sheeting having conductivity and a surface resistivity of less than 10 6 ohms on one surface thereof, comprising: providing a first layer of a rubber composition filled with from about 25 to about 40 percent by weight of an electrically conductive filler selected from the group consisting of carbon black, powdered metal and mixtures thereof, the percent by weight of said electrically conductive filler being based on the total weight of the rubber and the electrically conductive filler in said composition; bonding to said first layer, a second layer of a plastic film material which, prior to incorporation in said sheeting had a surface resistivity of at least 10 6 ohms; bonding to said second layer on the side opposite from said first layer, a third layer of a plastic film material; and bonding a reinforcing element between said second layer and said third layer.
Claim 19
Independent Claim
151 words
A method for producing a flexible sheeting having conductivity and a surface resistivity of less than 10 6 ohms on one surface thereof, comprising: providing a first layer of a rubber composition filled with from about 25 to about 40 percent by weight of an electrically conductive filler selected from the group consisting of carbon black, powdered metal and mixtures thereof, the percent by weight of said electrically conductive filler being based on the total weight of the rubber and the electrically conductive filler in said composition; bonding to said first layer, a second layer of a plastic film material which, prior to incorporation in said sheeting had a surface resistivity of at least 10 6 ohms; bonding to said second layer on the side opposite from said first layer, a third layer of a plastic film material; and bonding a reinforcing element between said second layer and said third layer.
Claim 20
Dependent Claim
17 words
The method of claim 17, further comprising a cementing layer interposed between said second and third layers.
Claim 21
Dependent Claim
13 words
The method of claim 17, wherein said reinforcing element is a nylon scrim.
Claim 22
Dependent Claim
15 words
The method of claim 17, wherein said second and third layers are films of polyvinylchloride.
Claim 23
Dependent Claim
14 words
The method of claim 17, wherein said rubber composition is an acrylonitrile-butadiene rubber composition.
Claim 24
Dependent Claim
28 words
The method of claim 17, further comprising the incorporation into said sheeting of amount of a flame retardant agent sufficient o improve the flame retardance of said sheeting.
Claim 25
Dependent Claim
13 words
The method of claim 22, wherein said flame retardant agent is antimony oxide.
Claim 26
Dependent Claim
29 words
The method of claim 17, further comprising the incorporation into said sheeting of amount of antibacterial agent sufficient to improve the antibacterial activity of the surface of said sheeting.
Claim 27
Dependent Claim
12 words
The method of claim 24, wherein said antibacterial agent is N-[(trichloromethyl) thio]-4-cyclohexene-1,2-dicarboximide.
Claim 28
Dependent Claim
49 words
The method of claim 17, wherein the surface of said second layer opposite said first layer, which had a surface resistivity of over 10 11 ohms before incorporation into said sheeting, is antistatic and has a surface resistivity of less than 10 11 ohms after incorporation into said sheeting.
Claim 29
Dependent Claim
25 words
The method of claim 26, wherein said surface resistivity of less than 10 11 ohms after incorporation into said sheeting is about 10 8 ohms.
Claim 30
Dependent Claim
44 words
The method of claim 17, wherein the surface of said third layer opposite said second layer, which had a surface resistivity of over 10 11 ohms before incorporation into said sheeting, is antistatic and has a surface resistivity of less than 10 11 ohms.
Claim 31
Dependent Claim
20 words
The method of claim 28, wherein said surface resistivity of less than 10 11 ohms is about 10 10 ohms.
Claim 32
Dependent Claim
20 words
The method of claim 17, wherein said surface resistivity of less than 10 6 ohms is about 10 3 ohms.
Claim 33
Dependent Claim
14 words
The sheeting of claim 1, wherein said second layer is a non-porous plastic film.
Claim 34
Dependent Claim
14 words
The method of claim 17, wherein said second layer is a non-porous plastic film.
Claim 35
Dependent Claim
22 words
The sheeting of claim 1, wherein said electrically conductive filler is carbon black and said second layer is a film of polyvinylchloride.
Claim 36
Dependent Claim
62 words
The sheeting of claim 1, wherein said electrically conductive filler is carbon black and said second layer is a film of polyvinylchloride, further comprising a third layer of a polyvinylchloride film, bonded to said said second layer on the side opposite said first layer by means of a polyvinylchloride plastisol, and an open scrim reinforcing element between said second and third layers.
Claim 37
Dependent Claim
22 words
The sheeting of claim 34, wherein said rubber composition is an acrylonitrile-butadiene rubber composition and said open scrim is a nylon scrim.
Claim 38
Dependent Claim
22 words
The method of claim 17, wherein said electrically conductive filler is carbon black and said second layer is a film of polyvinylchloride.
Claim 39
Dependent Claim
55 words
The method of claim 17, wherein said electrically conductive filler is carbon black and said second layer is a film of polyvinylchloride, further comprising providing an open scrim reinforcing element and a polyvinylchloride plastisol on said second layer on the side opposite said first layer and bonding thereto a third layer of a polyvinylchloride film.
Claim 40
Dependent Claim
22 words
The method of claim 37, wherein said rubber composition is an acrylonitrile-butadiene rubber composition and said open scrim is a nylon scrim.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |