Surface treatment and finishing are used to precisely engineer a
paper for its intended end use – improving printability, information capacity,
or enhancing the quality of pictures. Some of these finishing stages can take
place while the paper goes through the paper machine.
Surface sizing
The paper is passed through the nip
of a size press, or starch bath. Sizing makes the paper surface stronger and
its moisture resistance properties can also be improved. The sizing agent used
is normally starch. A size press in the paper machine’s dryer section usually applies
the surface sizing agent.
Glazing and calendaring
The paper can be further glazed and calendared at the end of the
paper machine by passing it between two or several rolls. As a result of this
machine glazing and calendaring, the paper acquires a one sided glossy surface
(MG) or a smooth machine finished (MF) surface.
Goodrich Agrochem’s
specially tailor made biopolymers for surface sizing application results in better stiffness, glaze &
surface strength.
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