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US 5,478,644 AGranted
Laminated polyester film
AssigneeDiafoil Hoechst Company, Limited
InventorJun Takahashi
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Abstract
A laminated polyester film comprising a polyester film and a layer comprising an antistatic agent and formed on at least one side of the polyester film, the antistatic agent being a high-molecular-weight antistatic agent having a nitrogen atom-containing group and a sulfonic acid or sulfonate group.
Claims17
A laminated polyester film comprising a polyester film and a layer comprising an antistatic agent formed on the polyester film,
- wherein the antistatic agent has a number average molecular weight of 10.sup.3 to 10.sup.7,
- wherein the antistatic agent contains at least one nitrogen atom-containing group selected from the group consisting of an amino group, an alkylamino group, and a pyridyl group,
- wherein the antistatic agent contains at least one sulfur atom-containing group selected from a sulfonic acid and a sulfonate group,
- wherein the content of sulfur atoms in the antistatic agent is from 1 to 20% by weight and the content of nitrogen atoms in the antistatic agent is from 0.03 to 10% by weight,
- wherein the ratio of the number of said sulfur atom-containing groups to the number of said nitrogen atom-containing groups is from 1.05 to 150,
- wherein the layer containing the antistatic agent comprises 1 to 100% by weight of the antistatic agent, and
- wherein the thickness of said layer containing the antistatic agent is 0.005 to 5 .mu.m.
4 more elements
Dependencies are inferred from the claim text.