Plastic Crusher Blade Material Selection Guide & NANJING ALAS Solution
In the global circular economy push, plastic recycling efficiency and blade quality are closely linked. This guide details blade material selection principles for different plastics and presents NANJING ALAS’s high-performance solutions, balancing professional guidance with practical application value.
Plastic Characteristics & Blade Selection Principles
Plastic hardness, toughness, and fiber content determine shredding stress; accurate material matching reduces costs and improves efficiency.
Key Plastic Types & Shredding Stress
Hard & brittle (ABS/PS/hard PVC): Strong instantaneous impact, easy blade chipping
Soft & tough (PE/PP/PA/film): High elasticity, easy blade wrapping/adhesion
Fiber-reinforced/thick/mixed: Severe edge wear, complex combined stress
Core Selection Principles
Hard plastics: High hardness, wear resistance, impact resistance
Soft plastics: High toughness, shear force, smooth cutting surface
Fiber-reinforced materials: Ultra-high wear resistance, chipping resistance
Recommended Blade Materials & NANJING ALAS Advantages
NANJING ALAS adopts premium tool steel and precision processing, aligning with material selection standards to meet harsh recycling demands.
For Hard & Brittle Plastics: SKD-11
Material Specifications
Chemical Composition: C(1.40–1.60%), Cr(11.00–13.00%), Mo(0.80–1.20%), V(0.20–0.50%)
Mechanical Properties: HRC 60–64, excellent wear resistance and impact toughness
NANJING ALAS Application Advantages
Vacuum-heat-treated SKD11 blades maintain sharp edges after thousands of cycles, withstanding hard plastic impact and reducing replacements.
For Soft & Tough Plastics: 9CrSi
Material Specifications
Chemical Composition: C(0.85–0.95%), Cr(1.20–1.50%), Si(1.00–1.30%)
Mechanical Properties: HRC 58–62, high toughness, good machinability
Application Advantages
CNC-ground smooth edges reduce wrapping/adhesion, cost-effective for small-batch soft plastic crushing.
For Fiber-Reinforced/Thick/Mixed Materials: DC-53
Material Specifications
Chemical Composition: C(1.00–1.10%), Cr(7.50–8.50%), Mo(1.80–2.20%)
Mechanical Properties: HRC 62–65, superior wear resistance vs SKD-11
NANJING ALAS Application Advantages
High-temperature stability and chipping resistance, suitable for heavy-duty continuous work, extending service life significantly.
NANJING ALAS: Trusted by Global Recyclers
Core Product Advantages
Impact Toughness: Unique tempering prevents chipping from stray metal/impurities
Custom Compatibility: Fits major global brands (Erema, Lindner, Vecoplan)
Lower OPEX: Longer blade life reduces tool changes and downtime
Precision Engineering: CNC-ground micron-level tolerances ensure uniform particle size, boosting recycled resin value
Selection Mistakes to Avoid
Avoid overusing high-end materials (e.g., SKD-11/DC-53 for soft plastics)
Do not use non-standard sizes (causes equipment damage)
Do not ignore edge precision (worsens wrapping for soft plastics)
Conclusion
High-quality blades are the core of efficient plastic recycling. NANJING ALAS combines premium materials, precision engineering, and custom solutions to help recyclers achieve higher throughput, lower costs, and sustainable operations in the circular economy.