Method for making paperboard for food container

Abstract

A method for making a paperboard includes a first process and a second process, wherein the first process includes steps of making a coating liquid by mixing bio-degradable liquid and primer, arranging the coating liquid in a container, sending the coating liquid to a roller unit by rollers and transporting the coating liquid to a printing unit by the roller unit. The second process includes steps of pre-heating the paperboard and eliminating static electricity from the paperboard, coating the coating liquid on the paperboard by the printing unit, one of rollers of the printing unit coating one or two sides of the paperboard with the coating liquid, pressing the paperboard to a desired shape and drying the paperboard.

1 . A method for making a paperboard, comprising:
 a step of making a coating liquid by mixing bio-degradable liquid and primer with a ratio of 9:1;   a step of arranging the coating liquid in a container and sending the coating liquid to a roller unit by rollers;   a step of transporting the coating liquid to a printing unit by the roller unit;   a step of pre-heating the paperboard and eliminating static electricity from the paperboard;   a step of coating the coating liquid on the paperboard by the printing unit, one of rollers of the printing unit coating one or two sides of the paperboard with the coating liquid, and   a step of scrolling the paperboard to be a paper roll.   
   
   
       2 . The method as claimed in  claim 1 , wherein the primer is copolymers which is mixed with the bio-degradable liquid by a ratio of 9:1, the coating liquid is heated by at least 150 degrees Celsius. 
   
   
       3 . The method as claimed in  claim 1 , wherein the primer is copolymers which are mixed with the bio-degradable liquid by a ratio of 1:9, the coating liquid is heated by at least 150 degrees Celsius. 
   
   
       4 . The method as claimed in  claim 1 , wherein the bio-degradable liquid is a Polylactic Acid (PLA). 
   
   
       5 . The method as claimed in  claim 1 , wherein the bio-degradable liquid is made by a material similar to PET. 
   
   
       6 . The method as claimed in  claim 1 , wherein the bio-degradable liquid is made by a material similar to PET which is Biomax 4024 PET by DU PONT. 
   
   
       7 . The method as claimed in  claim 1 , wherein the bio-degradable liquid is made by a material similar to PET which is Fepol by Far-Eastern Textile Ltd. 
   
   
       8 . The method as claimed in  claim 1 , wherein the primer is made by Polyvinyl Acetate (PVA). 
   
   
       9 . The method as claimed in  claim 1 , wherein the primer is made by Vinyl Acetate Resin.