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US 2014/0178621 A1Published application
Paper substrates useful as universal release liners
AssigneeInternational Paper Company
InventorsSTEVEN D. SCHULTZ, TIMOTHY J. BRADFORD, KOSARAJU KRISHNA MOHAN
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Abstract
This invention relates to a paper substrate useful as a universal release liner, as well as methods of making and using the same.
Claims20
A paper substrate, comprising
- a web comprising a plurality of cellulosic fibers;
- and
- a composition applied to at least one surface of said web, said coating comprising at least one latex and at least one calcium carbonate, wherein
- said latex has a Tg ranging from about 4 to about 10° C.;
- said latex has a modulus ranging from about 7×106 to about 3×107 dyn/cm2 at a temperature range of from about 120 to about 200° F.;
- and
- said substrate having a Parker Print Smoothness ranging from about 1.0 to about 3.0 as measured by as measured by TAPPI test method T 555 om-99.
4 more elements
A release liner, comprising
- a web of cellulose fibers having at least one surface and at least one composition coated on said at least one surface, the composition comprising from about 20 to about 30 parts of at least one latex based upon the weight of the composition, from about 15 to about 25 parts of at least one calcium carbonate based upon the weight of the composition, wherein said latex has a Tg ranging from about 4 to about 10° C., a modulus ranging from about 7×106 to about 3×107 dyn/cm2 at a temperature range of from about 120 to about 200° F.;
- wherein
- said release liner has a basis weight of from about 75 to about 100 lb/3300 ft2 and a Parker Print Smoothness ranging from about 1.0 to about 3.0 as measured by as measured by TAPPI test method T 555 om-99.
A paper substrate, comprising
- a coated web comprising a plurality of cellulosic fibers and a coating composition;
- wherein said coating composition comprises at least one latex and at least one calcium carbonate and the coated web comprises at least one supercalendered coated surface having a Parker Print Smoothness ranging from about 1.0 to about 3.0 as measured by as measured by TAPPI test method T 555 om-99;
- and
- a release layer in contact with the supercalendered coated surface, the release layer comprising solvent-based or solventless silicone.
1 more element
Dependencies are inferred from the claim text.