Paper based on recycled papers and process for producing thereof

• US 8,157,958 B2
• Filed: 12/04/2009
• Issued: 04/17/2012
• Est. Priority Date: 12/19/2008
• Status: Active Grant

• Current Assignee: S. A. De C. V. Copamex
• Original Assignee: Copamex SA de CV
• Inventors: Duarte Villa, Eduardo, Peregrina Gomez, José Trinidad
• Primary Examiner(s): Halpern, Mark
• Application Number:
  US12/631,519
• Publication Number:
  US 20100155005A1
• Time in Patent Office: 865 Days
• Field of Search: 162/146, 162/158, 162/177, 162/175, 162/179, 162/181.8, 162/181.2, 162/181.5
• US Class Current: 162/146
• CPC Class Codes: D21H 11/14 Secondary fibres working-up waste paper D21C5/02
• CPC Class Codes: D21H 21/16 Sizing or water-repelling agents
• CPC Class Codes: D21H 21/18 Reinforcing agents

Abstract

A paper produced according to this invention presents a composition of 10% by weight to 40% by weight of recovered post-consumer paper; 60% by weight to 90% by weight of recovered white paper; 0.38% by weight to 0.45% by weight of one or more sizing agents, and 3.33% by weight to 3.95% by weight of one or more binding agents. The method for producing paper that comprises the steps of forming a paper pulp from a mixture of 10% by weight to 40% by weight of recovered post-consumer paper, 60% by weight 90% by weight of recovered white paper, and 0.38% by weight to 0.45% by weight of one or more binding agents; reacting the pulp mixture with 0.38% by weight to 0.45% of one or more of sizing agents, and 0.75% by weight to 0.9% by weight of one or more binding agents; forming and drying a continuous sheet of paper from the pulp mixture, and reacting the continuous sheet of paper with 2.2% by weight to 2.6% by weight of one or more binding agents.

Claims

1. A process for producing paper, characterized by including the steps of:

forming a paper pulp from a mixture of 10% to 40% by weight of recovered post-consumer paper, 60% to 90% by weight of recovered white paper, and 0.38% to 0.45% by weight of one or more binding agents;

reacting the pulp mixture with 0.38% to 0.45% by weight of one or more sizing agents, and 0.75% to 0.9% by weight of one or more binding agents;

forming and drying a continuous sheet of paper from the pulp mixture; and

reacting the continuous sheet of paper with 2.2% to 2.6% by weight of one or more binding agents.

2. The process of claim 1, characterized in that the recovered post-consumer paper is selected from a group consisting of Cardboard, Solid Fibreboard, Corrugated Containers (OCC), Simple Corrugated Cardboard, Single-sided Corrugated Cardboard, Double Corrugated Cardboard, Rolled Cardboard, Duplex, Triplex or Multiplex Cardboard, Gray Cardboard, Solid Cardboard, Paper board, Kraft paper, Soft Mixed Paper (SMP), Hard Mixed Paper (HMP), Boxboard Cuttings, Mill Wrappers, Groundwood paper, News, News De-ink Quality (#7 ONP), Special News De-ink Quality (#8 ONP), Over-Issue News (OI or OIN), Magazines (OMG), New Double-Lined Kraft Corrugated Cuttings (DLK), Used Brown Kraft, Mixed Kraft Cuttings, New Colored Kraft, Grocery Bag Scrap (KGB), Kraft Multi-Wall Bag Scrap, New Brown Kraft Envelope Cuttings, Mixed Groundwood Shavings, Groundwood Computer Printout (GWCPO), New Colored Envelope Cuttings, Semi Bleached Cuttings, Unsorted Office Paper (UOP), Sorted Office Paper (SOP), Manifold Colored Ledger (MCL), Coated Groundwood Sections (CGS), Printed Bleached Board Cuttings, Misprinted Bleached Board, Unprinted Bleached Board, and combinations thereof.

3. The process of claim 2, characterized in that the recovered post-consumer paper is kraft-type selected from a group consisting of Corrugated Containers (OCC), Kraft Paper, Mill Wrappers, New Double-Lined Kraft Corrugated Cuttings (DLK), Used Brown Kraft, Mixed Kraft Cuttings, New Colored Kraft, Grocery Bag Scrap (KGB), Kraft Multi-Wall Bag Scrap, New Brown Kraft Envelope Cuttings, and combinations thereof.

4. The process of claim 1, characterized in that the recovered white paper is selected from a group consisting of White Blank News (WBN), Publication Blanks (CPB), Coated Soft White Shavings (SWS), Hard White Shavings (HWS), Hard White Envelope Cuttings (HWEC), Sorted White Ledger (SWL), Manifold White Ledger (MWL), Computer Printout (CPO), Coated Book Stock (CBS), and combinations thereof.

5. The process of claim 1, characterized in that the recovered white paper comprising:

at least 20% by weight of white waste paper; and

from 40% to 70% by weight of pre-consumer white paper.

6. The process of claim 1, characterized in that the sizing agent is selected from a group consisting of alkyl ketene dimer and its derivatives, alkenyl succinic anhydride, calcium stearate, cellulose stearate, and combinations thereof.

7. The process of claim 1, characterized in that the binding agent is selected from a group consisting of starch, cationic starch, cationic amylopectin starch, acetylated starch, ethylated starch, polyvinyl alcohol, carboxy-methyl cellulose, anionic polyacrylamide, cationic polyacrylamide, epichlorohydrin polyamine, polyvinyl acetate, polyacrylates, polyacrylic acid, polystyrene, amylopectin-2-hydroxy-3-(trimethylammonium)propyl ether chloride, and combinations thereof.

8. The process according to claim 1, characterized in that in the step of forming a paper pulp from a mixture of 10% to 40% by weight of recovered post-consumer paper, 60% to 90% by weight of recovered white paper, and 0.38% to 0.45% by weight of one or more binding agents, said binding agent is epichlorohydrin polyamine.

9. The process according to claim 1, characterized in that the step of forming a paper pulp from a mixture of 10% to 40% by weight of recovered post-consumer paper, 60% to 90% by weight of recovered white paper, and 0.38% to 0.45% by weight of one or more binding agents, further including the step of adding from 4.4% to 19% by weight of one or more fillers.

10. The process of claim 9, characterized in that the fillers are selected from a group consisting of calcium carbonate, granulated calcium carbonate, precipitated calcium carbonate, kaolin, titanium dioxide, rutile titanium dioxide, anatasic titanium dioxide, hydrated aluminum silicate, talc, and combinations thereof.

11. The process of claim 10, characterized in that said filler is calcium carbonate.

12. The process of claim 1, characterized in that in the step of reacting the pulp mixture with 0.38% to 0.45% by weight of one or more sizing agents, and 0.75% to 0.9% by weight of one or more binding agents, said sizing agent is alkyl ketene dimer and said binding agent is cationic starch.

13. The process of claim 1, characterized in that the step of reacting the pulp mixture with 0.38% to 0.45% by weight of one or more sizing agents, and 0.75% to 0.9% by weight of one or more binding agents, further including the step of adding from 0.04% to 0.05% by weight of fatty acid esters and surfactants.

14. The process of claim 1, characterized in that in the step of reacting the continuous sheet of paper with 2.2% to 2.6% by weight of one or more binding agents, said binding agent is acetylated starch.

15. The process of claim 1, characterized in that the step of reacting the continuous sheet of paper with 2.2% to 2.6% by weight of one or more binding agents, including the step of adding from 0.6% to 0.75% by weight of one or more printing agents.

16. The process of claim 1, characterized in that in the step of the step of reacting the continuous sheet of paper with 2.2% to 2.6% by weight of one or more binding agents, includes adding from 0.75% to 0.9% by weight of synthetic fibres of one or more synthetic fibres selected from a group consisting of red aventurines, green aventurines or other colors, and combinations thereof.