EP0514977A1
Expired / Lapsed
EP
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Antistatic drafting films
Assignee: Arkwright Inc
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Filing: 1992-05-14
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Granted: —
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Expires: 2012-05-14
Abstract
Abstract A matte drafting sheet composite at least one side of which comprises a single polymeric matrix layer containing particulates to provide a matte or drafting surface and a quaternary ammonium salt of high charge density at a concentration sufficient to provide a resistivity of said matrix layer of at most about 1 x 10¹³ ohms/square.
Inventors
- 👤 David Atherton
- 👤 Morgan E. Gager
- 👤 Paul Sankar Kumar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/68; G03G; G03G7/00; G03G7/0006; G03G7/002; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24405; Y10T428/24479; Y10T428/24612; Y10T428/24942; Y10T428/25; Y10T428/254; Y10T428/259
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A film composite comprising a substrate having on at least one side thereof a polymeric matrix layer which provides a matte finish or drafting surface to the film composite and which contains particulates and a quaternary ammonium salt, the cation of the quaternary ammonium salt having a charge density of from 3.33 x 10⁻³ to 13.5 x 10⁻³ at a concentration sufficient to provide a surface resistivity of said matrix layer of at most about 1 x 10¹³ ohms/square at 50% RH.
Claim 2
Dependent Claim
26 words
A film composite as recited in claim 1, wherein said matrix layer has a surface resistivity of about 1 x 10⁸ to 1 x 10¹³ ohms/square.
Claim 3
Dependent Claim
22 words
A film composite as recited in claim 1 or 2, wherein said quaternary ammonium salt contains an anion of a strong acid.
Claim 4
Dependent Claim
131 words
A film composite as recited in claims 1, 2 or 3, wherein the quaternary ammonium salt is encompassed by the following Formula I: wherein R₁, R₂, R₃ and R₄ are the same or different and are selected from the group consisting of: substituted or unsubstituted C₁-C₃ alkyl groups where in the alkyl groups may be substituted by hydroxy, C₁₋₃ alkoxy, amido or acyl, substituted or unsubstituted C₂-C₃ alkenyl groups where in the alkenyl groups may be substituted by hydroxy, C₁₋₃ alkoxy or amido, and substituted or unsubstituted c₂-c₃ alkynyl groups wherein the alkynyl groups maybe substituted by hydroxy, C₁₋₃ alkoxy or amido, and X is the anion of a strong acid; with the proviso that the formula weight of the Formula I compound cation is from 74 to about 300 amu.
Claim 5
Dependent Claim
30 words
A film composite as recited in claim 1, 2, 3 or 4, wherein on a side of the film opposite the matte finish or drafting surface is an image-forming layer.
Claim 6
Dependent Claim
104 words
A film composite comprising a substrate having on one side there of a thermoplastic polymeric matrix layer which provides a matte finish or drafting surface to the substrate, and on a side opposite the matte finish or drafting surface of the film an image-forming layer, wherein, said matte finish or drafting surface contains a particulate and a quaternary ammonium salt, the cation of the quaternary ammonium salt having a charge density of from 3.33 x 10⁻³ to 13.5 x 10⁻³ at a concentration sufficient to provide a surface resistivity of said matrix layer of at most about 1 x 10¹³ ohms/square at 50% RH.
Claim 7
Dependent Claim
20 words
A film composite as recited in claim 6, wherein said quaternary ammonium salt contains an anion of a strong acid.
Claim 8
Dependent Claim
129 words
A film composite as recited in claim 6 or 7, wherein said quaternary ammonium salt is encompassed by the following Formula I: wherein R₁, R₂, R₃ and R₄ are the same or different and are selected from the group consisting of: substituted or unsubstituted C₁-C₃ alkyl groups wherein the alkyl groups may be substituted by hydroxy, C₁₋₃ alkoxy, amido or acyl, substituted or unsubstituted C₂-C₃ alkenyl groups wherein the alkenyl groups may be substituted by hydroxy, C₁₋₃ alkoxy or amido, and substituted or unsubstituted C₂-C₃ alkynyl groups wherein the alkynyl groups may be substituted by hydroxy, C₁₋₃ alkoxy or amido, and X is the anion of a strong acid; with the proviso that the formula weight of the Formula I compound cation is from 74 to about 300 amu.
Claim 9
Dependent Claim
20 words
Use of the film composite of claim 1, 2, 3, 4, 5, 6, 7 or 8 as a drafting surface.
Claim 10
Dependent Claim
15 words
Use of the film composite of claim 6, 7 or 8 as an imaging surface.
References Cited (Backward Citations)
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