Tungsten Carbide Slitting Knife Blade with 1000°C Operating Temperature 350 MPa High Pressure and 1900 MPa Tensile Strength

Tungsten Carbide Thin Slitting Knife Blades are ultra-thin industrial cutting tools engineered for high-precision slitting and longitudinal cutting applications. They are widely used in the processing of flexible materials such as films, tapes, BOPP, lithium battery separators, paper, and composite materials. Manufactured through integral tungsten carbide sintering technology, these blades combine an ultra-thin geometric profile with exceptional hardness, delivering burr-free, smooth cut edges even under high-speed continuous operation.

Made from high-purity virgin tungsten carbide material, the blades achieve a hardness of HRA 90 or above, significantly outperforming conventional high-speed steel (HSS) blades. In typical applications such as BOPP film slitting, the service life of tungsten carbide blades is generally 5 to 10 times longer than that of HSS blades, drastically reducing replacement frequency and downtime for maintenance.

Through high-precision edge finishing processes, the blade edges are exceptionally sharp and free from micro-defects, ensuring smooth and clean cut surfaces while effectively eliminating burrs, fiber tear-out, and stringing. For demanding precision slitting applications, a micro-ground edge design is also available to further reduce cutting resistance and minimize material waste.

Tungsten carbide offers outstanding bending strength as well as resistance to high temperatures and corrosion, enabling the blades to withstand thermal loads and mechanical stresses encountered in high-speed continuous operations. This ensures that the blades maintain dimensional stability and consistent cutting performance over prolonged use.

The table below provides a direct comparison of key performance indicators between tungsten carbide thin slitting blades and conventional high-speed steel (HSS) blades:

The standard commonly used specification is 57.15 mm × 19.05 mm × 0.4 mm. Thickness can also be customized, ranging from 0.1 mm to 50 mm, to accommodate different material cutting requirements. The blades typically feature a standardized single-hole design for quick and easy mounting and positioning, ensuring compatibility with the majority of domestic and imported slitting machines on the market.

• Film Industry: Slitting and longitudinal cutting of BOPP, PET, PE, and other plastic films
• Adhesive Products: Processing of various tapes and protective films
• New Energy: Precision slitting of lithium battery separators
• Packaging & Printing: Cutting of paper, composite materials, and folding cartons
• Electronics & Light Industry: Cutting of polyester films, PVC, leather, and other flexible materials

Although the initial purchase cost of tungsten carbide thin slitting blades is higher than that of conventional steel blades, their significantly extended service life and consistently stable cut quality translate into substantially lower overall tooling costs. Reduced blade-change frequency also minimizes production line downtime, effectively improving Overall Equipment Effectiveness (OEE). In a market environment characterized by fluctuating raw material prices, adopting a "longer life, higher efficiency" consumables management strategy over the traditional "low cost, frequent replacement" approach has become the preferred path for precision processing industries.