Paper substrates useful as universal release liners
View Patent ↗This invention relates to a paper substrate useful as a universal release liner, as well as methods of making and using the same.
1. A composite structure, comprising:
a paper substrate comprising a web comprising a plurality of cellulosic fibers;
a coating layer applied to at least one surface of said web; wherein 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 TAPPI test method T 555 om-99, said coating layer 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.;
has a modulus ranging from about 7×10 6 to about 3×10 7 dyn/cm 2 at a temperature range of from about 120 to about 200° F.; and
contains no platinum catalyst inhibitor, wherein the platinum catalyst inhibitor is one or more platinum-catalyst inhibiting compound selected from the group consisting of amine, amide, neutralizing amine, ethanolamine, N,N-methylethanolamine, triethanolamine, N,N-dimethyl ethanolamine, n-butylamine, diethylamine, triethylamine, tetramethylenediamine, cyclohexylamine, melamine, dimethylformamide, nitrile, cyanate, oximo, nitroso, hydrazo, azo, adiponitrile, 2-butoxime, alpha-nitroso-betanaphthol, chelate, EDTA, NTA, sulfur-containing compound, sulfide, thio, tin-containing compound, tin salt, phosphorus-containing compound, phosphine, phosphites, arsenic-containing compound, antimony-containing compound, selenium-containing compound, tellurim-containing compound, chlorinated hydrocarbon-containing solvent with amine stabilizer, chlorinated hydrocarbon-containing monomer with amine stabilizer, alcohol solvent, ester solvent, ethanol, methanol, ethyl acetate, vinyl acetate, unsaturated compound, and any combination thereof; and a release layer applied to the coated layer, said release layer comprising a silicone-containing release agent.
2. The composite structure according to claim 1 , further comprising an adhesive layer applied to said release layer.
3. The composite structure according to claim 2 , further comprising a second paper substrate or a plastic substrate applied to said adhesive layer.
4. The composite structure according to claim 1 , wherein said latex is present at an amount ranging from about 10 to about 40 parts based upon the total weight of said coated layer.
5. The composite structure according to claim 4 , wherein said calcium carbonate is present at an amount ranging from about 10 to about 30 parts based upon the total weight of said coated layer.
6. The composite structure according to claim 4 , wherein said latex is a styrene-butadiene-containing latex.
7. The composite structure according to claim 1 , wherein said paper substrate is a release liner.
8. The composite structure according to claim 1 , wherein said coating layer is present at a coat weight of from about 3 to about 12 lb/3300 ft 2 .
9. The composite structure according to claim 1 , wherein said web has a basis weight of from about 65 to about 90 lb/3300 ft 2 .
10. A composite structure having a basis weight of from about 75 to about 100 lb/3300 ft 2 , and comprising:
a web of cellulose fibers having at least one surface;
at least one coating layer on said at least one surface of said web; wherein the coated web comprises at least one supercalendered coated surface having a Parker Print Smoothness ranging from 1.0 to 3.0 as measured by TAPPI test method T 555om-99, the coating layer comprising from about 20 to about 30 parts of at least one latex based upon the weight of the coating layer, and from about 15 to about 25 parts of at least one calcium carbonate based upon the weight of the coating layer, wherein said latex:
has a Tg ranging from about 4 to about 10° C.;
has a modulus ranging from about 7×10 6 to about 3×10 7 dyn/cm 2 at a temperature range of from about 120 to about 200° F.; and
contains no platinum catalyst inhibitor, wherein the platinum catalyst inhibitor is one or more platinum-catalyst inhibiting compound selected from the group consisting of amine, amide, neutralizing amine, ethanolamine, N,N-methylethanolamine, triethanolamine, N,N-dimethyl ethanolamine, n-butylamine, diethylamine, triethylamine, tetramethylenediamine, cyclohexylamine, melamine, dimethylformamide, nitrite, cyanate, oximo, nitroso, hydrazo, azo, adiponitrile, 2-butoxime, alpha-nitroso-betanaphthol, chelate, EDTA, NTA, sulfur-containing compound, sulfide, thio, tin-containing compound, tin salt, phosphorus-containing compound, phosphine, phosphites, arsenic-containing compound, antimony-containing compound, selenium-containing compound, tellurim-containing compound, chlorinated hydrocarbon-containing solvent with amine stabilizer, chlorinated hydrocarbon-containing monomer with amine stabilizer, alcohol solvent, ester solvent, ethanol, methanol, ethyl acetate, vinyl acetate, unsaturated compound, and any combination thereof; and a release layer applied to the coated layer, said release layer comprising a silicone-containing release agent.
11. A method of making the composite structure according to claim 10 , comprising
forming a web comprising a plurality of cellulosic fibers;
applying said coating layer to at least one surface of said web;
supercalendering at least one coated surface of said web to produce said composite structure.