Method for manufacturing bleached wood powder and papers

Abstract

The present invention relates to paper that is produced by mixing bleached wood powder with natural wood pulp, thereby improving the dewaterability while reducing the amount of pulp used such that inexpensive and high-quality paper is provided. The wood material is subjected to a process in which it is milled and dried and is then sorted to smaller than a predetermined size and cleaned, the cleaned wood powder is bleached by being stirred for a predetermined time after having been introduced together with a bleaching agent, and the wood powder resulting from the bleaching is subjected to grinding processing and to a sorting and cleaning process, thereby producing bleached wood powder, and paper is produced by mixing from 5 to 20% by weight of the bleached wood powder with from 80 to 95% by weight of natural wood pulp and then subjecting the mixture to a paper-making process.

What is claimed is: 
     
         1 . A method of manufacturing bleached wood power, comprising:
 a wood pulp dry step of performing a process of producing wood materials into wood pulp by grinding the wood materials using a grinder and drying the wood pulp in such a way as to have moisture content 1˜2 wt %;   a wood powder sorting and picking step of performing a process of sorting the wood pulp, dried in the wood pulp dry step, into wood powder having a length of a fiber of 0.15 mm and picking the wood powder;   a wood powder bleaching step of performing a process of inputting the wood powder, sorted and picked in the wood powder sorting and picking step, to bleaching equipment, adding a mixture of an H 2 O 2  (hydrogen peroxide) aqueous solution and salt water to the bleaching equipment after a lapse of 5 minutes, driving the bleaching equipment so that the mixture and the wood powder are stirred and the wood powder is bleached for 40 minutes;   a bleached wood power dry step of drying the bleached wood power by supplying steam after bleaching the wood power in the wood powder bleaching step; and   a bleached wood power sorting and picking step of sorting and picking the bleached wood power dried in the bleached wood power dry step.   
     
     
         2 . Paper manufactured using the bleached wood power manufactured according to a method of  claim 1 . 
     
     
         3 . The method according to  claim 1 , wherein paper is manufactured by mixing the manufactured bleached wood power of 5˜20 wt % with natural wood pulp of 80˜95 wt % and inputting the mixture to a sheet forming machine. 
     
     
         4 . Bleached wood power manufactured according to a method of  claim 1 .