Back to results
US 7,504,002 B2Granted
Method of producing coated paper with reduced gloss mottle
AssigneeNewpage Corporation
InventorsGregg Lee Brelsford, Steven Paul Metzler, Stephen Craig Petro, Stig Renvall, Susanne Lynn Sowers
Life of this patent
Estimating the term…
Abstract
A method of producing a coated paper having reduced gloss mottle and excellent smoothness includes the steps of calendering a base stock at a relatively high pressure in a first calendering step, coating at least one side of the calendered base stock and calendering the coated base stock at a relatively low pressure in a second calendering step.
Claims22
A method of producing a coated paper having reduced gloss mottle comprising:
- calendering a base stock at an average nip pressure of at least about 18,000 psi in a first calendering step;
- coating at least one side of said base stock with a coating composition to form a coated base stock;
- and
- calendering said coated base stock at a nip pressure not exceeding about 3000 psi in a second calendering step.
1 more element
A method of treating a web of cellulose fibers to reduce gloss mottle comprising:
- calendering a web of cellulose fibers in a first calendering step at a first average nip pressure to a density of at least about 15 lbs/ream per caliper point;
- coating at least one side of the web with a coating composition to form a coated paper web;
- and
- calendering said coated paper web in a second calendering step at a second average nip pressure wherein said first average nip pressure is greater than said second average nip pressure to form a product having a gloss value of at least about 45, a Tobias gloss mottle rating of no more than about 550 and a Parker Print Surf of less than about 1.2 microns.
1 more element
Dependencies are inferred from the claim text.