Antistatic drafting films
AssigneeArkwright Incorporated
InventorsDavid Atherton, Morgan E. Gager, Sankar K. Paul
Life of this patent
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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.times.10.sup.13 ohms/square.
Claims25
A film composite comprising a substrate having on at least one side thereof a polymeric matrix layer which provides a matte 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.times.10.sup.-3 to 13.5.times.10.sup.-3 at a concentration sufficient to provide a surface resistivity of said matrix layer of at most about 1.times.10.sup.13 ohms/square at 50% RH.
A film composite comprising a substrate having on at least one side thereof a thermoplastic polymeric matrix layer which provides a matte drafting surface to the film composite and which contains particulates and
- a quaternary ammonium salt of the following Formula I:
- ##STR3## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are selected from the group consisting of:
- substituted or unsubstituted C.sub.1 -C.sub.3 alkyl groups wherein the alkyl groups may be substituted by hydroxy, C.sub.1-3 alkoxy, amido or acyl, substituted or unsubstituted C.sub.2 -C.sub.3 alkenyl groups wherein the alkenyl groups may be substituted by hydroxy, C.sub.1-3 alkoxy or amido, and substituted or unsubstituted C.sub.2 -C.sub.3 alkynyl groups wherein the alkynyl groups may be substituted by hydroxy, C.sub.1-3 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 and that the charge density of the quaternary ammonium cation is from 3.33.times.10.sup.-3 to 13.5.times.10.sup.-3, and that the cation is present at a concentration sufficient to provide a surface resistitivy of said matrix layer of at most about 1.times.10.sup.13 ohms/square at 50% RH.
A film composite comprising a substrate having on one side thereof a thermoplastic polymeric matrix layer which provides a matte drafting surface to the substrate, and on a side opposite the matte drafting surface of the film an image-forming layer,
- wherein, said matte 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.times.10.sup.-3 to 13.5.times.10.sup.-3 at a concentration sufficient to provide a surface resistivity of said matrix layer of at most about 1.times.10.sup.13 ohms/square at 50% RH.
A film composite comprising a substrate having on at least one side thereof a single polymeric matrix layer which provides a matte 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 .times.10.sup.-3 to 13.5.times.10.sup.-3 at a concentration sufficient to provide a surface resistivity of said matrix layer of at most about 1.times.10.sup.13 ohms/square at 50% RH.
Dependencies are inferred from the claim text.