Application Cases
Battery Electrode Knives
SG Tungsten Carbide Industrial Razor Blades | High Precision, Burr-Free for Lithium Battery Separator Film Cutting
Detailed Description
For over 25 years, SG has focused on the development and production of high-precision carbide blades for separator cutting. Our blades are made from high-density, fine-grain tungsten carbide and processed with advanced sintering and grinding techniques. Each piece is designed to perform reliably in both dry and wet separator processes, with stable output even under high-speed conditions.
Performance Highlights
Material: Cemented carbide
Hardness: HRA 92.5 ±0.5
Grain size: 0.5–0.8μm, submicron structure
Surface coating: TiAlN / TiCN multilayer, anti-sticking and wear-resistant
Performance Highlights
Anti-build-up coating prevents powder adhesion and residue
Balanced for 1000–1500 m/min operation
RoHS & REACH compliant
Features
3–5x longer tool life compared to standard blades
Clean separation without smearing or material transfer
Stable, low-vibration cutting at high speeds
Custom thickness (0.1–0.3mm), edge angles (single&double), and hole patterns
Validated by CATL, ATL, BYD, and other Tier-1 manufacturers
Specifications
| Items | L*W*H mm |
| 1 | 43*22*0.15 |
| 2 | 43*22*0.2 |
| 3 | 43*22*0.3 |
Applications
• Lithium-ion battery separator films (PE, PP, PVDF, PVA composite materials)
• Dry process slitting for power battery separators (EV applications)
• Wet process cutting of ceramic-coated separators (ESS batteries)
• Ultra-thin film processing for 3C consumer battery applications
• High-speed precision slitting of polymer films up to 12μm thickness
FAQ
Q: Why does SG's tungsten carbide outperform standard blades?
A: Our nanostructured carbide composition combined with multi-axis CNC grinding creates edges that maintain sharpness 5-8 times longer while resisting micro-chipping and adhesive wear - critical for contamination-sensitive battery production.
Q: Can you accommodate special material requirements?
A: Absolutely! We offer material-specific edge treatments including:
Hydrophobic coatings for wet-process separators
Anti-static treatments for dry-process applications
Customized edge geometries for unique film composites
Q: What are your quality assurance procedures?
A: Every blade undergoes:
Dimensional inspection (optical comparators)
Edge sharpness testing (1000X digital microscopy)
Run-out verification (high-speed dynamic balancing)
Sample cutting tests with customer-specified materials
Q: What's your production capacity?
A: Our 20,000 sqm facility can produce:
50,000+ standard blades/month
10,000+ customized blades/month
With 30-35 day standard lead time (15-20 days for urgent orders)
Why Global Battery Manufacturers Choose SG Blades
Tested lifespan: Up to 23% longer than Japanese and German brands
Cost-effective: 40–50% savings over European equivalents
Hands-on support: Our team works closely with your engineers to solve cutting problems
Fast samples: 7-day turnaround for new designs