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.

Dependencies are inferred from the claim text.