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What are the main factors affecting the tensile properties of rubber transmission belts

The tensile performance of a rubber belt refers to its performance under tensile force. This characteristic is directly related to the stability and reliability of the transmission belt under load, starting and operating conditions.
The role of fiber reinforcement layer
tensile strength source
Rubber drive belts typically contain fiber reinforcements such as polyester, nylon, or fiberglass. The layout and orientation of these fibers in the rubber matrix directly determines the tensile strength of the drive belt. The function of the fiber layer is to prevent the transmission belt from stretching and breaking under high tension by withstanding the tensile force.
Fiber type and selection
Different types of fibers have different tensile strengths and tensile moduli. Nylon fibers generally have higher tensile strength, while polyester fibers may be more elastic. Manufacturers need to select the appropriate type of fiber based on the requirements of the specific application and optimize their layout to improve the overall tensile properties of the drive belt.
Tensile properties of rubber materials
Rubber molecular chain cross-linking
The rubber material of the rubber transmission belt needs to have good tensile resistance. The molecular chains of rubber can effectively resist stretching and twisting through a cross-linked structure. The vulcanization process is one of the key steps in the manufacturing of rubber transmission belts. By controlling the vulcanization conditions, effective cross-linking of rubber molecular chains can be achieved and its tensile resistance can be improved.
Rubber hardness and elasticity
The hardness and elasticity of rubber have an important impact on tensile properties. Harder rubber generally provides better tensile resistance, but rubber that is too hard may sacrifice elasticity, making it prone to cracking under high load conditions. Manufacturers need to strike a balance between stiffness and elasticity to meet the needs of specific applications.
Surface design and texture
The role of texture
The design and texture of a drive belt's surface directly affects the friction between it and other components, thereby affecting tensile properties. Properly designed textures provide greater surface area, dispersing frictional heat and reducing wear. In addition, the carefully designed surface texture helps prevent slippage and improve transmission efficiency.
Texture Manufacturing Process
The molds and manufacturing processes used in drive belt manufacturing also have an impact on surface texture. High-quality manufacturing processes ensure uniform and stable surface texture, preventing uneven wear and improving tensile properties.
Manufacturing process optimization
Homogeneous rubber mix
Ensuring a homogeneous rubber mix during the manufacturing process is critical to improving tensile properties. Uniform mixing ensures even distribution of additives, fillers and fibers in the rubber, preventing local performance differences and improving overall tensile properties.
Proper vulcanization process
Vulcanization is one of the key steps in rubber drive belt manufacturing. Proper vulcanization process ensures the cross-linked structure of the rubber, improving its tensile resistance and overall performance. Parameters such as vulcanization time, temperature and pressure need to be strictly controlled.
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