Rice Huller Rubber Rollers (SBR, NBR, EPDM) – Performance Comparison

1. Core Material Properties

Rice huller rubber rollers are engineered with specific rubber compounds to balance durability, elasticity, and thermal stability. Key metrics include:

• ​Shore A Hardness: 85°–95° (±3° tolerance) 1
• ​Temperature Range: -30°C to +150°C (varies by material) 2
• ​Abrasion Resistance: Measured via ASTM D412 standards

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​2. Material Comparison

​1. Styrene-Butadiene Rubber (SBR)

• ​Pros:
  • Cost-effective for large-scale use.
  • Low breakage rate (0.5%–1%).
• ​Cons:
  • Poor abrasion resistance (wear rate: 0.8–1.2 cm³/1.61km).
  • Limited thermal stability (>60°C degrades performance).
• ​Best For:
  • General-purpose clients in tropical climates.
  • Processing capacity: 150–500 tons/year (tropical: 150–250 tons; cold: 300–500 tons).

​2. Polyurethane (PU)

• ​Pros:
  • High wear resistance (wear rate: 0.3–0.5 cm³/1.61km).
  • Suitable for cold climates (-30°C to +80°C).
• ​Cons:
  • High noise levels (>85 dB).
  • Poor heat resistance (>80°C causes premature aging).
• ​Best For:
  • Budget-conscious clients in cold regions.
  • Processing capacity: 300–800 tons/year.

​3. Nitrile Rubber (NBR)

• ​Pros:
  • Excellent heat resistance (up to +100°C).
  • Stable performance with low breakage (<0.7%).
• ​Cons:
  • Higher upfront cost.
  • Limited elasticity in humid conditions.
• ​Best For:
  • Economical clients requiring durability.
  • Processing capacity: 200–600 tons/year.

​4. Ethylene Propylene Diene Monomer (EPDM)

• ​Pros:
  • Superior abrasion resistance (wear rate: 0.2–0.4 cm³/1.61km).
  • Extended lifespan (20–30% longer than SBR).
• ​Cons:
  • Requires specialized vulcanization.
  • Higher initial investment.
• ​Best For:
  • Cost-saving clients in extreme climates.
  • Processing capacity: 300–800 tons/year.

​5. Enhanced EPDM+

• ​Pros:
  • Industry-leading wear resistance (wear rate: <0.2 cm³/1.61km).
  • 40% reduction in energy consumption.
• ​Cons:
  • Premium pricing (2–3× standard models).
• ​Best For:
  • High-volume industrial clients.
  • Processing capacity: 400–1,000 tons/year.

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​3. Operational Guidelines

• ​Temperature Control:
  • Maintain ≤50°C to prevent hardness degradation (Shore A drops 2–4° above 60°C).
• ​Pressure Settings:
  • Roller gap: 0.5–0.8 mm for optimal hulling.
  • Pressure plates ensure uniform force distribution.
• ​Storage:
  • Keep unused rollers in dry, UV-protected areas.