Method of Manufacturing an opaque paper using Genus Typha L.

Abstract

The present invention relates to a method of manufacturing an opaque paper by using Genus Typha L. The method includes preparing Genus Typha L. bleached pulp from Genus Typha L. and fabricating a paper from the Genus Typha L. bleached pulp. According to the present invention, the method can provide paper with a low basis weight, even if it includes very little or no mineral charging agent but having high opacity, smoothness, and printability. Since it includes very little or no mineral charging agent, it may not have much deteriorated mechanical strength.

1 . A method of manufacturing an opaque paper by using Genus  Typha L.  comprising:
 preparing Genus  Typha L.  bleached pulp with whiteness of more than 70% from Genus  Typha L. ; and   manufacturing opaque paper from the Genus  Typha L.  bleached pulp.   
     
     
         2 . The method of  claim 1 , wherein the Genus  Typha L.  includes a perennial plant selected from the group consisting of  Typha Orientalis, Typha Angustata, Typha Latifolia , and mixtures thereof. 
     
     
         3 . The method of  claim 1 , wherein the Genus  Typha L.  bleached pulp includes Klason lignin with fiber coarseness ranging from 0.02 to 0.08 ug/m and average fiber width ranging from 8 to 15 um, at less than 3 wt %. 
     
     
         4 . The method of  claim 1 , which comprises refining Genus  Typha L.  bleached pulp fiber, sorting and conditioning the refined Genus  Typha L.  bleached pulp fiber, and sheet-forming and converting the sorted and conditioned Genus  Typha L.  bleached pulp fiber. 
     
     
         5 . The method of  claim 4 , wherein the paper fabrication from the Genus  Typha L.  bleached pulp further comprises wood pulp or non-wood pulp such as mulberry bast, flax, hemp, cotton plant, rice straw, bagasse, or red algae, other than the Genus  Typha L.  bleached pulp as a second pulp. 
     
     
         6 . The method of  claim 5 , wherein the Genus  Typha L.  bleached pulp is comprised in an amount of 10 to 90 wt %, and the second pulp is comprised in an amount of 90 to 10 wt %. 
     
     
         7 . The method of  claim 6 , wherein the wood pulp is at least one selected from broad-leaved or needle-leaved pulp. 
     
     
         8 . The method of  claim 5 , wherein the paper formation from the Genus  Typha L.  bleached pulp further comprises a mineral charging agent in an amount of 1 to 20 wt % based on the total weight of the pulp and the mineral charging agent. 
     
     
         9 . A paper with a low basis weight comprising no mineral charging agent or in an amount of less than 10 wt % but having excellent opacity and mechanical strength according to  claim 1 .