Correlation between Surface Energy and Adhesion Force of Polyethylene/Paperboard: A Predictive Tool for Quality Control in Laminated Packaging

Table 1

Influence of flame treatment on roughness parameter Ra (µm) for the top (coated with polar latex A) and the bottom surface of the paperboard.

	Ra (µm) top (white side) coated with polar latex A		Ra (µm) bottom (brown side)
	Without flame treatment	With flame treatment	With starch/without flame treatment	With starch/with flame treatment	Without starch/with flame treatment
Mean (µm)	0.52	0.50	3.21	3.23	3.50
Standard deviation	0.02	0.09	0.13	0.13	0.16