Heat, grease, and cracking resistant release paper and process for producing the same

Abstract

A heat, grease, and cracking resistance release paper, said release paper is composed by 55% to 68% by weight of cellulose fiber, 3% to 6% by weight of one or more sizing agents, 27% to 37% by weight of one or more fillers, and 1% to 3% by weight of one or more binding agents.

1 . A heat, grease, and cracking resistance release paper, which comprising:
 from 55% to 68% by weight of cellulose fiber;   from 3% to 6% by weight of one or more sizing agents;   from 27% to 37% by weight of one or more fillers; and   from 1% to 3% by weight of one or more binding agents.   
   
   
       2 . The paper of  claim 1 , wherein the cellulose fiber is selected from a group consisting of softwood pulp, hardwood pulp, and combinations thereof. 
   
   
       3 . The paper of  claim 2 , wherein the cellulose fiber comprises:
 from 70% to 85% of softwood pulp; and   from 15% to 30% of hardwood pulp.   
   
   
       4 . The paper of  claim 1 , wherein the sizing agent is selected from a group consisting of alkyl ketene dimer and derivates, alkenyl succinic anhydride, calcium stereate, cellulose stereate, and combinations thereof. 
   
   
       5 . The paper of  claim 4 , wherein the sizing agent includes:
 from 2.5% to 5% by weight of alkyl ketene dimer and derivatives; and   from 0.5% to 1% by weight of calcium stereate.   
   
   
       6 . The paper of  claim 1 , wherein the filler is 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. 
   
   
       7 . The paper of  claim 6 , wherein the filler includes:
 from 26.8% to 36% by weight of calcium carbonate; and   from 0.2% to 1% by weight of titanium dioxide.   
   
   
       8 . The paper of  claim 1 , wherein 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. 
   
   
       9 . The paper of  claim 8 , wherein the binding agent includes:
 from 0.8% to 1.6% by weight of acetylated starch;   from 0.1% to 0.4% by weight of anionic polyacrylamide;   from 0.05% to 0.25% by weight of sodium polyacrylate;   from 0.01% to 0.07% by weight of epichlorohydrin polyamine;   from 0.3% to 0.6% by weight of starch cationic starch; and   from 0.01% to 0.07% by weight of amylopectin-2-hydroxy-3-(trimethylammonium) propyl ether chloride.   
   
   
       10 . A process for producing a heat, grease, and cracking resistance release paper, the process is characterized by including the steps of:
 forming a paper pulp starting out from a mixture of 55% to 68% by weight of cellulose fiber, from 6% to 7.5% by weight of one or more fillers, and from 0.03% to 0.05% by weight of one or more binding agents;   reacting the paper pulp with from 1.5% to 2.4% by weight of one or more sizing agents, from 17% to 27% by weight of one or more fillers, and from 0.7% to 1.2% by weight of one or more binding agents;   forming and drying a continuous sheet of paper from the paper pulp; and   reacting the continuous sheet of paper with from 1.5% to 3.6% by weight of one or more sizing agents, from 2.5% to 4% by weight of one or more fillers, and from 0.27% to 1.75% by weight of one or more binding agents.   
   
   
       11 . The process of  claim 10 , wherein the cellulose fiber is selected from a group consisting of hardwood pulp, softwood pulp, and combinations thereof. 
   
   
       12 . The process of  claim 11 , wherein the cellulose fiber comprises:
 from 70% to 85% of softwood pulp; and   from 15% to 30% of hardwood pulp.   
   
   
       13 . The process of  claim 10 , wherein the sizing agent is selected from a group consisting of alkyl ketene dimer and derivatives, alkenyl succinic anhydride, calcium stereate, cellulose stereate, and combinations thereof. 
   
   
       14 . The process of  claim 10 , wherein the filler is 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. 
   
   
       15 . The process of  claim 10 , wherein 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. 
   
   
       16 . The process of  claim 10 , wherein the step of forming a paper pulp starting out from a mixture of 55% to 68% by weight of cellulose fiber, from 6% to 7.5% by weight of one or more fillers, and from 0.03% to 0.05% by weight of one or more binding agents; wherein said filler is granulated calcium carbonate and said binding agent is epichlorohydrin polyamine. 
   
   
       17 . The process of  claim 10 , wherein the step of reacting the pulp with from 1.5% to 2.4% by weight of one or more sizing agents, from 17% to 27% by weight of one or more fillers, and from 0.7% to 1.2% by weight of one or more binding agents; wherein said sizing agent is alkyl ketene dimer, said filler is granulated calcium carbonate, and said binding agent is selected from a group consisting of cationic starch, anionic polyacrylamide, sodium polyacrylate, amylopectin-2-hydroxy-3-(trimethylammonium) propyl ether chloride, and combinations thereof. 
   
   
       18 . The process of  claim 17 , wherein said binding agent includes:
 from 0.35% to 0.57% by weight of cationic starch;   from 0.24% to 0.37% by weight of anionic polyacrylamide; and   from 0.11% to 0.17% by weight of sodium polyacrylate.   
   
   
       19 . The process of  claim 10 , wherein the step of reacting the continuous sheet of paper with from 1.5% to 3.6% by weight of one or more sizing agents, from 2.5% to 4% by weight of one or more fillers, and from 0.27% to 1.75% by weight of one or more binding agents; wherein said sizing agent is selected from a group consisting of alkyl ketene dimer, alkenyl succinic anhydride, calcium stereate, and combinations thereof; wherein said filler is selected from a group consisting of calcium carbonate, titanium dioxide, and combinations thereof; and wherein said binding agent is selected from a group consisting of acetylated starch, ethylated starch, sodium polyacrylate, and combinations thereof 
   
   
       20 . The process of  claim 19 , wherein said sizing agent includes:
 from 1% to 2% by weight of alkyl ketene dimer; and   from 0.5% to 1.6% by weight of calcium stereate.   
   
   
       21 . The process of  claim 19 , wherein said filler includes:
 from 1.78% to 3.3% by weight of calcium carbonate; and   from 0.3% to 0.7% by weight of titanium dioxide.   
   
   
       22 . The process of  claim 19 , wherein said binding agent includes:
 from 0.25% to 1.7% by weight of acetylated starch; and   from 0.02% to 0.05% by weight of sodium polyacrylate.