Method for making readily defibered pulp product

Abstract

A wet-laid wood pulp product containing cellulose pulp fibers and elongate precipitated calcium carbonate having a diameter of 0.015 to 0.6 microns at its maximum diameter and a length of 1 to 10 microns and the calcium carbonate being incorporated within the sheet and a method for making the product.

1 . A method of making a wet laid cellulose pulp sheet comprising
 providing cellulose pulp fibers to a headbox,   providing elongate precipitated calcium carbonate having a diameter of 0.015 to 0.6 microns at its maximum diameter and a length of 1 to 10 microns to the headbox.   forming a wet sheet comprising the cellulose pulp fibers and the elongate precipitated calcium carbonate,   dewatering and drying the sheet to form a wet-laid pulp sheet incorporating within the sheet the elongate nano or near nano precipitated calcium carbonate.   
   
   
       2 . The method of  claim 1  wherein the elongate precipitated calcium carbonate is present in the amount of 3 to 40% of the weight of the cellulose pulp. 
   
   
       3 . The method of  claim 1  wherein the elongate precipitated calcium carbonate is present in the amount of 3 to 15% of the weight of the cellulose pulp. 
   
   
       4 . The method of  claim 1  wherein the elongate precipitated calcium carbonate is 1 to 3 microns in length. 
   
   
       5 . The method of  claim 1  wherein the elongate precipitated calcium carbonate is 3 to 10 microns in length. 
   
   
       6 . The method of  claim 1  wherein the elongate precipitated calcium carbonate is 0.015 to 0.45 microns in diameter at its maximum diameter. 
   
   
       7 . The method of  claim 6  wherein the elongate precipitated calcium carbonate is present in the amount of 3 to 40% of the weight of the cellulose pulp. 
   
   
       8 . The method of  claim 6  wherein the elongate precipitated calcium carbonate is present in the amount of 3 to 15% of the weight of the cellulose pulp. 
   
   
       9 . The method of  claim 6  wherein the elongate precipitated calcium carbonate is 1 to 3 microns in length. 
   
   
       10 . The method of  claim 6  wherein the elongate precipitated calcium carbonate is 3 to 10 microns in length.