US4784908A
Expired / Lapsed
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Static dissipative laminate for work surfaces
Assignee: General Electric Co
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Filing: 1987-08-13
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Granted: 1988-11-15
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Expires: 2007-08-13
Abstract
Abstract A static dissipative laminate having a resistivity on the order of 106 to 109 ohms/square and a surface resistance in the static dissipative range even at very low humidities is produced by adding to the melamine resin for the decor sheet a small amount of ionic salt and a small amount of an aliphatic tertiary amine or glycerin which is believed to function as a humectant. The core sheets are formed of carbon filled paper impregnated with a phenolic resin containing a small amount of ionic salt.
Inventors
- 👤 Israel S. Ungar
- 👤 Robin D. O'Dell
- 👤 Alice Simon
- 👤 Joseph A. Lex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:04
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/18; B32B2260/00; B32B2260/04; B32B2260/046; B32B2264/00; B32B2264/10; B32B2264/107; B32B2264/108; B32B2307/00; B32B2307/20; B32B2307/21; B32B2307/50; B32B2307/584; B32B2386/00; B32B2451/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/26; Y10T428/30; Y10T428/31504; Y10T428/31844; Y10T428/31848; Y10T428/31851; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31942; Y10T428/31946; Y10T428/31949; Y10T428/31964
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
98 words
A decorative, static dissipative, high pressure laminate comprising a plurality of consolidated layers including a plurality of carbon containing core layers impregnated with thermoset core resin containing up to 6% by weight based on the weight of the resin solids of an ionic salt; and a decor layer above said core layers, said decor layer having an abrasion resistant covering thereon and impregnated with thermoset resin containing 1-7% by weight of an ionic salt and an humectant in an amount sufficient to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 2
Dependent Claim
98 words
A decorative, static dissipative, high pressure laminate comprising a plurality of consolidated layers including a plurality of carbon containing core layers impregnated with thermoset core resin containing up to 6% by weight based on the weight of the resin solids of an ionic salt; and a decor layer above said core layers, said decor layer having an abrasion resistant covering thereon and impregnated with thermoset resin containing 1-7% by weight of an ionic salt and an humectant in an amount sufficient to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 3
Dependent Claim
35 words
A laminate according to claim 1 further comprising a core layer formed of kraft paper without carbon and impregnated with said thermoset core resin, located between said carbon containing core layers and said decor layer.
Claim 4
Dependent Claim
37 words
A laminate according to claim 2 further containing a bottom core layer lying beneath said carbon containing core layers, said bottom core layer being formed of kraft paper without carbon and impregnated with said thermoset core resin.
Claim 5
Dependent Claim
27 words
A laminate according to claim 1 further comprising a bottom core layer formed of kraft paper without carbon, and impregnated with said ionic salt containing core resin.
Claim 6
Dependent Claim
23 words
A laminate according to claim 1 further comprising an ultra-thin abrasion resistant layer containing solid lubricant forming the upper surface of said laminate.
Claim 7
Dependent Claim
13 words
A laminate according to claim 1 wherein said ionic salt is lithium chloride.
Claim 8
Dependent Claim
31 words
A laminate according to claim 1 wherein said ionic salt in said decor layer is sodium acetate or sodium formate and said ionic salt in said core layers is lithium chloride.
Claim 9
Dependent Claim
19 words
A laminate according to claim 1 wherein the resistance of the core is about 10 6 -10 9 ohms.
Claim 10
Dependent Claim
20 words
A laminate according to claim 1 having a zero volt charge after two seconds at 17% or lower relative humidity.
Claim 11
Dependent Claim
22 words
A laminate according to claim 1 wherein said abrasion resistant covering on said decor layer is an ultra-thin abrasion resistant coating thereon.
Claim 12
Dependent Claim
22 words
A laminate according to claim 10 wherein said ultra-thin abrasion resistant coating contains solid lubricant so that said laminate is scuff resistant.
Claim 13
Dependent Claim
21 words
A laminate according to claim 1 wherein the quantity of ionic salt, based on the weight of resin solids, is 1-4%.
Claim 14
Dependent Claim
34 words
A laminate according to claim 1 wherein said ionic salt in said core resin comprises lithium chloride present in an amount of 1-3% by weight, based on the weight of the core resin solids.
Claim 15
Dependent Claim
27 words
A laminate according to claim 1 wherein said aliphatic tertiary amine is present in an amount of 1-4% by weight, based on the weight of resin solids.
Claim 16
Dependent Claim
90 words
A decorative, static dissipative, high pressure laminate comprising a plurality of consolidated layers having a zero volt charge after two second at 17% or lower relative humidity, said consolidated layers including a plurality of core layers having a conductivity of 5×10 4 to 5×10 6 ohms; and a decor layer above said core layers, said decor layer being impregnated with a thermoset resin containing an amount sufficient of an ionic salt humectant and to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 17
Dependent Claim
90 words
A decorative, static dissipative, high pressure laminate comprising a plurality of consolidated layers having a zero volt charge after two second at 17% or lower relative humidity, said consolidated layers including a plurality of core layers having a conductivity of 5×10 4 to 5×10 6 ohms; and a decor layer above said core layers, said decor layer being impregnated with a thermoset resin containing an amount sufficient of an ionic salt humectant and to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 18
Dependent Claim
34 words
A decorative, static dissipative, high pressure laminate according to claim 1, wherein said humectant is an aliphatic tertiary amine present in an amount of 1-6% by weight based on the weight of resin solids.
Claim 19
Dependent Claim
32 words
A decorative, static dissipative, high pressure laminate according to claim 1, wherein said humectant is glycerin present in an amount of about 1-8% by weight based on the weight of resin solids.
Claim 20
Dependent Claim
93 words
A static dissipative, high pressure laminate comprising a plurality of consolidated layers having a zero volt charge after two seconds at 17% or lower relative humidity, said consolidated layers including a plurality of core layers having a conductivity of 5×10 4 to 5×10 6 ohms; and a decor layer above said core layers, said decor layer being impregnated with a thermoset resin and an amount sufficient of an ionic salt, glycerin or an aliphatic tertiary amine to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 21
Dependent Claim
93 words
A static dissipative, high pressure laminate comprising a plurality of consolidated layers having a zero volt charge after two seconds at 17% or lower relative humidity, said consolidated layers including a plurality of core layers having a conductivity of 5×10 4 to 5×10 6 ohms; and a decor layer above said core layers, said decor layer being impregnated with a thermoset resin and an amount sufficient of an ionic salt, glycerin or an aliphatic tertiary amine to provide a surface resistance no greater than about 2×10 9 at a relative humidity of 17%.
Claim 22
Dependent Claim
21 words
A laminate according to claim 18 wherein said decor layer is covered with an ultra-thin abrasion resistant coating containing solid lubricant.
Claim 23
Dependent Claim
54 words
A laminate according to claim 18 wherein said plurality of core layers includes at least one carbon containing core layer, a core layer formed of kraft paper without carbon located between said at least one carbon containing core layer and said decor layer, and a bottom core layer formed of kraft paper without carbon.
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) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |