Corrosion-Resistant Log Saw Blades for Nonwoven & Hygiene Converting

Wet wipe lines continuously expose blades to preservatives (phenoxyethanol), surfactants, and alcohol-based solutions at elevated humidity. Bare D2 tool steel develops micro-pitting at the cutting edge within weeks under these conditions, accelerating wear and creating a particulate contamination risk. The solution is a corrosion-resistant surface treatment: TiN PVD coating (2–3 µm, HV 2300+) provides a chemically inert barrier against alcohol and surfactant ingress, while hard chrome plating seals surface micro-pores against cleaning agent penetration during washdown cycles.

Fraying on spunbond PP or SMS substrates is caused by two factors: incorrect bevel geometry and/or excessive lateral runout. Synthetic fibres are elastic — they deflect ahead of a shallow tissue-spec bevel (15°–25°) instead of shearing cleanly. Nonwoven substrates require a steeper primary bevel (25°–35°) to concentrate cutting force at the fibre contact point. Additionally, lateral runout above 0.20 mm causes the blade to compress the log rather than shear it, producing ragged edges. Our nonwoven blades are CMM-verified to ≤0.15 mm lateral runout and ground with a compound bevel profile optimised for synthetic fibre.

Yes. We manufacture to customer drawing or sample for Fameccanica, GDM, Curt G. Joa, Zuiko, and Chinese domestic OEM platforms. Bore diameter, drive-pin hole pattern, OD, and thickness are all customisable. Send us your OEM drawing or a worn blade sample and we will provide a dimensional confirmation and first-article sign-off before full production.

TiN PVD (titanium nitride) is a thin, extremely hard coating (2–3 µm, HV 2300+) applied in a vacuum chamber. It provides an inert barrier against chemical corrosion, adds surface hardness that resists micro-abrasion from SAP particles in absorbent core lines, and extends edge service intervals. Hard chrome is a thicker electrodeposited layer (20–30 µm) that offers excellent corrosion resistance in high-humidity environments and reduces friction coefficient against synthetic fibre webs. For wet wipe lines with aggressive chemistry, TiN is the preferred option. For dry or semi-dry nonwoven lines in high-humidity mill environments, hard chrome is cost-effective.

Most nonwoven hygiene converting log saws do not use continuous in-line CBN sharpening systems (unlike tissue lines). Blades are typically replaced on a scheduled interval rather than continuously dressed. However, if your line does use in-line CBN grinding, our D2 blades hardened to HRC 58–60 are compatible with standard CBN wheel specifications. The TiN coating will be removed by CBN contact at the cutting edge, which is normal — the protective benefit applies to the blade body, not the actively sharpened edge zone.