Recycled deinked sheet articles
A wet-laid fibrous product is provided that comprises recycled cellulosic fibers, cellulose ester staple fibers, and residual recycled ink, where the fibrous product has less ink content compared to the ink content for a 100% cellulose comparative fiber wet-laid product, when processed under similar conditions. The wet-laid fibrous product can be formed from a deinked recycled paper pulp slurry, the pulp slurry comprising recycled cellulosic fibers, cellulose ester staple fibers, and ink. A deinking process for the slurry is also provided.
1. A wet-laid fibrous product comprising waste/recycled cellulosic fibers from one or more printed waste/recycle sources, cellulose ester staple fibers, and residual recycled ink from said waste/recycled cellulosic fibers, wherein the fibrous product has less residual ink content compared to the residual ink content for a 100% Cellulose Comparative composition, wherein the cellulose ester staple fibers are present in an amount in the range from 4 to 16 wt %, based on the dry weight of the total fibers, have an average denier per filament (DPF) of 1.8 to less than 3.0 and an average cut length of 3 to less than 6 mm, and wherein the cellulose ester staple fibers are crimped and have an average of 5 CPI or more.
2. The wet-laid fibrous product according to claim 1 , wherein the product comprises said waste/recycled cellulosic fibers in an amount of 50 wt % or more, based on the total dry weight of fibers in the product.
3. The wet-laid fibrous product according to claim 1 , wherein the cellulose ester staple fiber has an average DPF of 1.8 to 2.8.
4. The wet-laid fibrous product according to claim 1 , wherein the cellulose ester staple fiber has a multi-lobal cross-sectional shape.
5. The wet-laid fibrous product according to claim 1 , wherein the recycled cellulosic fibers and cellulose ester staple fibers are co-refined.
6. The wet-laid fibrous product according to claim 1 , wherein the wet laid product has at least 2% higher brightness compared to a 100% Cellulose Comparative composition processed under similar conditions.
7. A wet-laid fibrous product formed from a deinked recycled paper pulp, the pulp comprising recycled cellulosic fibers from one or more printed waste/recycle sources that has been deinked, cellulose ester staple fibers, and residual recycled ink from the recycled cellulosic fibers, wherein the fibrous product has less residual ink content compared to the residual ink content for a 100% Cellulose Comparative composition, and wherein the deinked recycled paper pulp has a Canadian standard freeness at least 5% higher than a 100% Cellulose Comparative composition, wherein the cellulose ester staple fibers are present in an amount in the range from 4 to 16 wt %, based on the dry weight of the total fibers, have an average denier per filament (DPF) of 1.8 to less than 3.0 and an average cut length of 3 to less than 6 mm, and wherein the cellulose ester staple fibers are crimped and have an average of 5 CPI or more.
8. The wet-laid fibrous product according to claim 7 , wherein the product comprises recycled cellulosic fibers in an amount of 50 wt % or more, based on the total dry weight of fibers in the product.
9. The wet-laid fibrous product according to claim 7 , wherein the cellulose ester staple fiber has an average DPF of 1.8 to 2.8.
10. The wet-laid fibrous product according to claim 7 , wherein the cellulose ester staple fiber has a multi-lobal cross-sectional shape.
11. The wet-laid fibrous product according to claim 7 , wherein the recycled cellulosic fibers and cellulose ester staple fibers are co-refined.
12. The wet-laid fibrous product according to claim 7 , wherein the wet laid product has at least 2% higher brightness compared to a 100% Cellulose Comparative composition processed under similar conditions.
13. A deinking process comprising:
providing an aqueous waste paper pulp slurry that comprises waste/recycled cellulosic fibers from one or more printed waste/recycle sources, cellulose ester staple fibers, and residual recycled ink from said waste/recycled cellulosic fibers; and
subjecting the aqueous waste paper pulp slurry to deinking conditions to provide a slurry having a reduced ink content,
wherein the cellulose ester staple fibers are present in an amount sufficient to reduce the ink content, compared to the ink content for a 100% Cellulose Comparative composition, wherein the cellulose ester staple fibers are present in an amount in the range from 4 to 16 wt %, based on the dry weight of the total fibers, have an average denier per filament (DPF) of 1.8 to less than 3.0 and an average cut length of 3 to less than 6 mm, and wherein the cellulose ester staple fibers are crimped and have an average of 5 CPI or more.
14. The deinking process according to claim 13 , wherein the recycled cellulosic fibers and cellulose ester staple fibers are co-refined.
15. The deinking process according to claim 13 , further comprising forming a wet laid product from the reduced ink slurry, wherein the wet laid product has at least 1 wt % less residual ink compared to a 100% Cellulose Comparative composition processed under similar conditions.
16. The deinking process according to claim 15 , wherein the wet laid product has at least 2% higher brightness compared to a 100% Cellulose Comparative composition processed under similar conditions.