Guide to Rice Hulling Rubber Rollers: SBR, PU, NBR, EPDM, and QFPMF+ Material Performance Analysis

1. SBR (Styrene-Butadiene Rubber)

Performance Introduction:
SBR exhibits properties similar to natural rubber and is the most widely produced synthetic rubber. It offers superior abrasion resistance, aging resistance, and thermal stability compared to natural rubber, with a more uniform texture.
Advantages:

• High abrasion resistance.
• Excellent aging and heat resistance.
  Disadvantages:
• Low elasticity.
• Poor flex resistance and tear strength.
• Challenging processing characteristics, including weak self-adhesion and low raw gum strength.
  Temperature Range:
  -50°C to +100°C.
  Applications:
  Used as a substitute for natural rubber in tires, rubber sheets, hoses, shoes, and general-purpose industrial products.

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​2. PU (Polyurethane)

Performance Introduction:
PU is characterized by exceptional abrasion resistance, high strength, good elasticity, and excellent oil resistance. It also demonstrates strong ozone resistance, aging resistance, and airtightness.
Advantages:

• Superior wear and oil resistance.
• High tensile strength.
  Disadvantages:
• Poor thermal stability (>80°C causes degradation).
• Limited resistance to water, alkalis, and solvents (e.g., aromatic hydrocarbons, chlorinated hydrocarbons, ketones, esters, alcohols).
  Temperature Range:
  -30°C to +80°C.
  Applications:
  Manufacturing shock-absorbing components, wear-resistant parts, and high-load machinery seals.

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​3. NBR (Nitrile Butadiene Rubber)

Performance Introduction:
NBR provides strong abrasion resistance and water resistance, along with excellent bonding properties.
Advantages:

• High oil resistance (second only to polysulfide rubber).
• Superior protection against fuels and greases.
  Disadvantages:
• Weak ozone and acid resistance.
• Limited elasticity and poor electrical insulation.
• Poor compatibility with polar solvents.
  Temperature Range:
  -30°C to +100°C.
  Applications:
  Seals, gaskets, and fuel-resistant systems in oily or humid environments.

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​4. EPDM (Ethylene Propylene Diene Monomer)

Performance Introduction:
EPDM excels in high-temperature resistance, ozone resistance, UV resistance, and weatherability. It also offers good electrical insulation, chemical stability, and impact elasticity.
Advantages:

• Withstands extreme temperatures (-30°C to +150°C).
• Resistant to acids, alkalis, and weathering.
  Disadvantages:
• Poor adhesion and solvent compatibility.
• Slightly inferior mechanical properties compared to PU.
  Temperature Range:
  -30°C to +150°C.
  Applications:
  Chemical equipment linings, high-temperature hoses, steam tubes, and industrial seals.

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​5. QFPMF+ (Enhanced High-Wear Rubber)

Performance Introduction:
QFPMF+ features unmatched abrasion resistance and thermal stability, with superior chemical and radiation resistance.
Advantages:

• Withstands temperatures up to 300°C.
• Excellent resistance to acids, alkalis, and oils.
• Outstanding radiation and vacuum resistance.
  Disadvantages:
• High cost and poor cold flexibility.
• Low elasticity and breathability.
  Temperature Range:
  -20°C to +200°C.
  Applications:
  Aerospace and military-grade seals, hoses, and components requiring extreme durability.