For soft and thin materials such as plastic film, paper, and nonwoven fabrics, slitting operations can generally be performed using three different methods:

 

1. Crush Cutting

 

Crush cutting uses a circular knife driven by pneumatic pressure. The knife is pressed against a hardened counter knife, allowing the material to be cut and slit through a crushing action.

 

2. Shear Slitting

 

Shear slitting uses two circular knives, an upper knife and a lower knife, both equipped with cutting edges. The upper knife is generally thinner and is pressed against the lower knife by pneumatic pressure or spring force.

 

The two cutting edges work against each other in a scissor-like action to cut and slit the material.

 

3. Razor Blade Slitting

 

Unlike the two slitting methods described above, industrial razor blade slitting does not require a counter knife or lower blade.

 

The material is cut directly by the sharp cutting edge of the razor blade itself, making it possible to perform slitting with a simple and compact cutting arrangement.

 

Key Features of Industrial Razor Blades

 

1. Three-Hole Design for Easy Mounting

 

The blade is designed with three mounting holes in the center, making it easy to position and securely fix the blade onto the slitting equipment.

 

2. Double-Edged Design with Four Usable Cutting Points

 

Both sides of the blade are double-edged. The blade can also be turned over for continued use.

 

As a result, one blade provides a total of four usable cutting points, helping maximize blade utilization and service life.

 

3. No Additional Knife Holder Required – Ideal for Narrow Slitting

 

Industrial razor blades can be directly mounted onto the slitting mechanism without requiring a complicated knife holder.

 

Because of their compact design and small installation space, they are particularly suitable for narrow-width slitting and fine-strand cutting applications.

 

Typical applications include the slitting of plastic flat yarns or strands used in woven bags, such as PP woven bags and onion bags.

 

Conclusion

 

Industrial razor blades offer several advantages, including a compact design, easy mounting, four usable cutting points, and the ability to operate without a counter knife or lower blade.

 

They are particularly suitable for slitting soft and thin materials such as plastic film, paper, nonwoven fabrics, and plastic yarns, especially in narrow-width and fine-strand slitting applications.