Determining Matrix Channel Width for Heavyweight Folding Boxboard Grades
Determining matrix channel width requires adding steel rule thickness to board caliper multiplied by 1.5 for machine direction or 1.7 for cross direction scores.
Creasing Rule Selection for Coated Folding Boxboard Conversion
Selecting steel creasing rules and matrix channels for coated FBB requires matching board caliper and CTMP core shear limits to prevent surface cracking.
Optimizing Creasing Tool Geometry for Barrier Coated Boxboard Converting
Optimizing creasing geometry for barrier board requires expanding female channel width and applying polished male rule radii to prevent barrier film splitting.
Matrix Channel Width Calibration for Matte Co-Extruded Film Converting
Calibrating matrix channel width to rule thickness plus 1.6 times composite caliper prevents matte skin fracture on co-extruded film laminated paperboard.
Matt Lamination Cracking at the Crease against Gloss That Survives
Matt lamination cracks at the crease because silica matting inclusions reduce film elongation capacity, requiring expanded matrix channels to lower folding strain.