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Material, Types and Applications of Silicone Timing Belt

Silicone timing belt is produced by base timing belt coating with silicone material. Silicone covered timing belt is commonly used in diaper and napkin machine, packing and printing industry. This paper mainly introduces the material, type, advantages and disadvantages of silicone synchronous belt and its application.

Blue Silicone Timing Belt for Diaper Machine after 3 Months Worn Out

Structure and Material of Silicone Timing Belt

Infrastructure

Silicone timing belt is mainly composed of three layers:

  • Base Belt: Base timing belt is made of polyurethane or neoprene rubber, the teeth profile can be customized(like arc teeth, trapezoidal teeth )
  • Tensile Cord: The polyurethane timing belt has steel wire or Kevlar reinforced core, while the neoprene rubber timing belt usually has fiberglass cord.
  • Silicone Coating: The seamless silicone coating is blade coated on timing belt surface, the hardness, color and thickness of silicone coating can be customized according to customers’ requirements.

Silicone Material Performance

Silica gel (methylvinyl silicone rubber) has the following performances due to the high bond energy of Si-O bond in its molecular chain (about 444 kJ/mol) :

  • Wide temperature range: It is flexible from -60°C to 200°C and stable at high or low temperatures.
  • Aging resistance: Under ultraviolet and ozone environment condition, belt service life extends 3-5 times.
  • Chemical resistance: Resistant to acid, alkali, grease and solvents, especially for harsh working conditions.
    4. Anti-stick: Silicone is not easy stick to the surface of most materials, and requires a specific silicone glue to achieve bonding.
  • Food grade: Silicone is food grade and can safely contact food.

As an industrial belt manufacturer, Puteken selects the highest quality silicone raw materials and tests the silicone for heat resistance. Our silicone can withstand high temperatures of 400 degrees and has excellent wear resistance.

Silicone High Temperature Test

Types of Silicone Timing Belt

Silicone coated PU timing belt: Silica gel is coated on the surface of the polyurethane toothed belt to improve the temperature resistance, chemical resistance and friction of the timing belt. The silicone coating thickness varies from 1.5mm to 10mm. The standard color of coating are white, blue, gray and green, and other colors can be customized. Polyurethane and silicone material both are food grade, can be directly in contact with food, widely used in food processing, diaper production, health products, medical equipment and printing industries.

Rubber timing belt coated with silicone: A layer of silica gel is coated on the surface of the rubber timing belt to increase the belt friction and anti-viscosity, which is suitable for high-speed machines in the sanitary products industry and packaging machines in the packing industry.

Advantages and Disadvantages of Silicone Timing Belt

Advantages

  • Excellent Heat Resistance: The silicone material has excellent high temperature resistance characteristics, and it can operate stably at temperatures up to 220℃ or higher, making it ideal for applications where require  high temperature.
  • Superior Chemical Resistance: Silica gel has a high resistance to a variety of chemical material (such as acids, bases, solvents and oils), which makes it preferable in food processing, chemical and pharmaceutical industries.
  • High Elasticity and Anti-aging: The silicone layer not only has good elasticity, but also maintains stable physical properties after a long time of operation, reducing cracks or wear caused by aging.
  • Good Tensile Strength and Wear Resistance: By combining with high-performance reinforced fibers, silicone timing belt can maintain excellent tensile strength and wear resistance when subjected to high load transmission, ensuring long-term stable transmission.

Disadvantages

  • Higher Cost: Compared with traditional rubber or PU timing belts, silicone timing belts are more demanding in raw materials and production processes, so the cost is relatively high and may not be suitable for cost-sensitive projects.
  • Strict Technological Process: The coating process of silica gel has high requirements for equipment and operation, and once the process is improperly controlled, it is easy to cause the silicone coating layer or fall off , thus affecting the belt overall performance.
  • High Friction Affect Stable Operation: Surface silicone coating friction coefficient is higher, compared to polyurethane or rubber synchronous belt, more likely to produce resistance, affecting the flow of transportation.
  • Strong Adhesion to Dust or Pollutants: Silica gel material has a certain adhesion, easy to absorb dust,  affecting the belt service life and cleanliness.

Applications of Silicone Timing Belt

  • Napkin & Diaper Production Line
    Silicone timing belt is mainly used in the production of diapers and napkins for material transportation, semi-finished product transfer and finished product output. Its wear resistance, flexibility and non-sticky properties ensure continuity and efficiency in the production process.‌
  • Food Processing and Packaging
    Food-grade silicone belts are often used in food processing and packaging production lines for transmission, sorting and synchronization transmission, which not only ensures food safety, but also can resist high temperature and oil pollution in the production process.
  • Chemical and Pharmaceutical Industries
    Due to its excellent acid, alkali and solvent resistance, silicone timing belt is often used in chemical equipment and pharmaceutical machinery to ensure efficient and stable transmission in harsh environments.
  • High-temperature Industrial Equipment
    In high temperature industries such as aluminum processing and metallurgy, the silicone timing belt can withstand extreme temperatures to meet the long-term operation needs of the transmission system under harsh conditions.
  • Precision Instruments and Automation Equipment
    High-speed, high-precision automated production lines and robot systems has extreme high transmission accuracy, silicone timing belt with its excellent mechanical properties and stability, become an important part of these equipment.

Comparisons of Silicone Coating with Other Coatings 

Coating type Silicone PU Foil Sponge Natural rubber  Polyurethane Foam
 Hardness 40 Shore A 85 shore A 20 shore A 45 Shore A 40 shore A
Thickness 1.5- 12 mm 2-4mm 4-20mm 2-6mm 6-14mm
Advantages Heat resistant,
wear resistant,
non-sticky
 Oil resistant
chemical resistant
Soft High temperature resistant Excellent cushioning
Disadvantages High cost Not heat resistant Not oil resistant Not chemical resistant Poor waterproof
Maximum temparature 400 ℃ 80 ℃ 70 ℃ 120 ℃ 80 ℃
Application Hygiene industry Glass Industry Fragile material transportation Packing industry Glass bottle transportation

Why Choose Puteken Silicone Timing Belt?

Puteken has been committed in silicone timing belt research and develop for more than 5 years。

  • Superior Durability
    Puteken timing belts are made from high-quality silicone, which provides excellent resistance to wear, heat, and aging, ensuring long service life even in demanding industrial environments.
  • High Temperature Resistance
    Silicone timing belts can withstand extreme temperatures, making them ideal for applications in high-heat or fluctuating temperature conditions.
  • Excellent Flexibility & Low Friction
    The flexibility of silicone allows for smooth and efficient power transmission with minimal friction, reducing energy loss and improving overall system efficiency.
  • Chemical & Oil Resistance
    Puteken silicone belts offer excellent resistance to oils, chemicals, and solvents, making them suitable for industries such as automotive, food processing, and pharmaceuticals.
  • Precision Performance
    These belts ensure accurate and reliable synchronization of mechanical components, improving operational efficiency and reducing downtime.
  • Noise Reduction
    Compared to traditional rubber belts, silicone timing belts operate more quietly, making them ideal for noise-sensitive environments.
  • Customization Options
    Puteken offers customization in terms of size, tooth profile, and reinforcement materials to meet specific industrial requirements.

Would you like additional details on applications or technical specifications? Contact us now!

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Hi,I am author of this post. We have over 10 years of industrial belt production, and we already offered more than 50 countries foreign customers with top quality conveyor belts and transmission belts, such as PVC conveyor belt for logistics, PU conveyor belt for food industry, flat power transmission belt for textile industry and etc. If you have any requests, get in touch with us for free quote and give you professional suggestion.

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