Method for making bio-degradable paper board

Abstract

A method for making the paper board includes a step of pre-heating and the paper roll and removing static electricity from the paper roll by way of corona treatment; a step of pre-heating the bio-degradable material to be liquid status; a step of extruding the bio-degradable material to be foam type layer and coating the foam type layer on the paper roll; a step of cooling the foam type layer by cooling rollers which evenly press the layer on the paper board; a step of cooling the layer on the paper board by cooling rollers and treated by another corona treatment, and a step of cutting the paper board into desired sections.

1 . A method for making bio-degradable paper board, comprising the following steps: 
 step 1: pre-heating and the paper roll and removing static electricity from the paper roll by way of corona treatment;    step 2: pre-heating the bio-degradable material to be liquid status;    step 3: extruding the bio-degradable material to be foam type layer and coating the foam type layer on the paper roll;    step 4; cooling the foam type layer by cooling rollers which evenly press the layer on the paper board;    step 5: cooling the layer  20  on the paper board  10  by cooling rollers and treated by another corona treatment, and    step 6: cutting the paper board into desired sections.    
   
   
       2 . The method as claimed in  claim 1 , wherein the paper roll is stretched between silicon rollers to be paper board and the iron rollers are heated.  
   
   
       3 . The method as claimed in  claim 2 , wherein the iron rollers are provided with hot water which flows through the iron rollers.