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D2 steel plastic recycling shredder blades for industrial granulator machines

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Plastic Recycling Shredder Blades

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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.