M2 HSS Circular Slitter Knives for Spunbond, Meltblown & SMS Nonwoven Fabrics
Slitter Knives
M2 HSS and D2 circular slitter knives for spunbond PP, meltblown, SMS, and SMMS nonwoven fabrics. Specialised rake angle geometry prevents fibre fraying and slub formation on loose-structure materials. Used in hygiene, medical, filtration, and geotextile slitting lines.
- ■Material: M2 HSS (standard) / D2 (heavy nonwoven) / 52100 (hydroentangled)
- ■Application: Spunbond PP, Meltblown, SMS/SMMS, Hydroentangled, Geotextile
■ ISO 9001:2015 Certified
■ In-House Heat Treatment
■ Strict Dimensional Tolerances
■ Global Door-to-Door Delivery
[ Engineering Reference ]
Decisive Specifications
| Material | M2 HSS (standard) / D2 (heavy nonwoven) / 52100 (hydroentangled) |
|---|---|
| Hardness | HRC 62–64 (M2) | HRC 60–62 (D2) |
| Rake Angle | 15°–20° positive rake (nonwoven-optimised geometry) |
| Surface Finish | Ra ≤ 0.4μm — reduces fibre adhesion and slub formation |
| Options | ESD conductive coating (meltblown / filtration media) |
| Application | Spunbond PP, Meltblown, SMS/SMMS, Hydroentangled, Geotextile |
■ All values verified via CMM inspection · ISO 9001:2015
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[ Standard Reference ]
Common Standard Dimensions
| Outer Diameter (OD) | Inner Diameter (ID) | Thickness |
|---|---|---|
| 75 mm | 32 mm | 1.0 mm |
| 100 mm | 40 mm | 1.0 mm |
| 100 mm | 50 mm | 1.5 mm |
| 120 mm | 50 mm | 1.0 mm |
| 120 mm | 60 mm | 1.5 mm |
| 150 mm | 75 mm | 2.0 mm |
[ Technical Audit ]
Engineering Advantages
Nonwoven-Optimised Rake Angle
Standard slitter knife geometries designed for paper and plastic film use a 5°–10° positive or neutral rake angle. For loose-structure nonwoven, this geometry pushes fibres laterally before shearing, causing the frayed edge that registers as a quality defect in hygiene product inspection. Our 15°–20° positive rake shears through fibre bundles in a single progressive action, producing a clean, tight slit edge at line speeds up to 400 m/min.
ESD Conductive Coating
Electrostatic charge is generated when lightweight PP nonwoven fabric runs over metallic surfaces at high speed. On meltblown layers (<15 GSM), this charge causes fibres to cling to the blade face and transfer as contamination to the reslitted roll edge. Our ESD conductive coating dissipates charge from the blade face continuously, eliminating fibre attraction without requiring process speed reduction.
Medical Batch Traceability
For converting lines supplying surgical drape, gown, and sterilisation wrap manufacturers, we provide full batch traceability: M2 steel mill certificates, hardness test records, and dimensional CMM reports referenced to your purchase order batch number. Documentation is formatted for inclusion in your supplier qualification file.
[ System Inventory ]
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[ Knowledge Base ]
Product FAQs & Buying Guidance
Technical FAQs
01What rake angle should I specify for spunbond polypropylene at 200 m/min?+−
For spunbond PP at 200 m/min in basis weights 15–80 GSM, specify 15° positive rake on the cutting bevel. This geometry shears polypropylene fibres cleanly at the contact point without the lateral displacement that causes fraying. For heavier basis weights (80–150 GSM SSS or SMMS), a 20° positive rake with a slightly wider bevel width provides better stability at reduced line speed (150 m/min).
02My meltblown slitting produces visible fibre transfer on the blade face. What is the cause?+−
Fibre transfer on meltblown fabric (particularly <10 GSM layers) is caused by electrostatic charge accumulation on the blade face, not edge geometry. PP meltblown fibres at 1–5μm diameter are extremely susceptible to static attraction. Specify the ESD conductive coating option on your next order and ensure the slitter machine frame is properly earthed. This typically eliminates visible blade-face contamination within one production shift.
Why Choose Sureay
01Can Sureay supply nonwoven slitter knives with a certificate of conformance for our medical device supplier audit?+−
Yes. We issue a Certificate of Conformance (CoC) with each batch referencing the purchase order number, steel grade (M2 AISI M2 / DIN 1.3343), hardness range (HRC 62–64), and dimensional verification results. For full medical device supplier qualification, we can also provide the steel mill certificate and heat treatment batch record on request.
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