Contech USA

Web Slitting

How do I determine the correct slitter for my material?
Theory: Uses a stationary razor blade.
Cost: The most economical initial cost.
Replacement Blades: Inexpensive, easily obtainable.
Slit Quality: Good.
Secondary Process: Can create dust.
Minimum Slit Width: .5”
Max. Web Speed: 4,000-fpm
Materials: Paper, coated papers, film laminates.

Score Slitting:
Theory: Uses a circular blade with a radius edge to nullify the material against a hardened anvil roller.
Cost: Moderate initial cost.
Replacement Blades: Inexpensive, easily obtainable.
Slit Quality: Poor.
Secondary Process: Can create ridge at slit edge, typically, seals edge of laminated materials.
Minimum Slit Width: .5”
Max. Web Speed: 4,000-fpm
Materials: Papers, coated papers, foils, laminates, tissues, metal sheeting, polyethylene and co-extrusion films.

Shear Slitting:
Theory: Uses a pair of circular blades to achieve a continuous shearing action.
Cost: High initial cost.
Replacement Blades: Prioritized mounting styles resulting in expensive replacements typically, available only from the manufacturer.
Slit Quality: Excellent.
Secondary Process: Can create a minute ridge at slit edge.
Minimum Slit Width: 3.5” Blade Diameter 1”
5.9” Blade Diameter: 2”
7.87” Blade Diameter: 3”
Max. Web Speed: 3.5” Blade Diameter 3,500-fpm
5.9” Blade Diameter: 5,500-fpm
7.87” Blade Diameter: 8,000-fpm
Materials: Papers, coated papers, foils, laminates, tissues, metal sheeting, polyethylene and co-extrusion films.

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