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Tensile Strength of Rubber

13 May 2024 Posted by: makeyourmark New Technologies

Rubber is a versatile material used in a wide range of applications due to its unique properties, one of which is its tensile strength. Tensile strength measures the maximum amount of stress that a material can withstand while being stretched or pulled before breaking. In the case of rubber, tensile strength is particularly important as it determines the material’s ability to withstand stretching forces without breaking. The tensile strength of rubber is influenced by various factors such as its composition, processing methods, and environmental conditions. Understanding the tensile strength of rubber is crucial for selecting the right type of rubber for specific applications and ensuring that products made from rubber meet the necessary durability requirements.

How To Measure Tensile Strength of Rubber

Rubber’s tensile strength is a key property that defines its ability to resist breaking under tension. It is measured by applying a force to a rubber sample until it breaks, and is typically expressed in units of force per unit area, such as pounds per square inch (psi) or megapascals (MPa). The process of measuring rubber’s tensile strength involves preparing a sample of the material in a specific shape, such as a dumbbell-shaped specimen, and then subjecting it to a tensile testing machine. The machine pulls the sample at a constant rate until it breaks, recording the force applied and the elongation of the sample. The tensile strength is then calculated by dividing the maximum force applied by the cross-sectional area of the sample. Factors such as the sample’s dimensions, the speed of the testing machine, and the temperature of the environment can all affect the measured tensile strength. 

Rubber Tensile Strength Chart

A rubber tensile strength chart is a graphical representation of the tensile strength values of different types of rubber under various conditions. These charts are essential tools for engineers, designers, and manufacturers to compare the tensile strength of different rubber materials and select the most suitable one for their specific applications. The chart typically lists different types of rubber along one axis and their corresponding tensile strength values along the other axis. By referring to a rubber tensile strength chart, professionals can quickly identify which type of rubber is best suited for their needs based on the required tensile strength. These charts also provide valuable information for quality control, ensuring that rubber materials meet the necessary specifications for their intended use.

Like durometer charts, tensile strength charts can be unique to specific companies or manufacturers, based on their specific standards and testing methods. It is a best practice for users to always consult the chart provided by the manufacturer before choosing a material. 

Silicone Rubber Tensile Strength

Silicone rubber is known for its excellent tensile strength, making it a popular choice for various applications. Silicone rubber’s tensile strength can vary depending on its formulation, with some types offering higher tensile strength than others. This variation allows silicone rubber to be tailored to meet specific application requirements, in industries such as aerospace, automotive, and medical. In aerospace applications, silicone rubber’s high tensile strength allows it to withstand the extreme conditions of space, while in the automotive industry, it is used in seals and gaskets where durability and resilience are crucial. Similarly, in the medical field, silicone rubber’s tensile strength ensures that it can withstand the rigors of sterilization and repeated use. 

Butyl Rubber Tensile Strength

Butyl rubber is another elastomer known for its unique combination of properties, including good tensile strength. Butyl rubber’s tensile strength is particularly noteworthy in applications where resistance to gasses, water, and chemicals is required. This makes butyl rubber ideal for use in tire inner tubes, seals, and gaskets, where it can provide a reliable barrier against moisture and other environmental factors. Butyl rubber’s tensile strength is also crucial in the construction industry, where it is used in roofing membranes and sealants. Additionally, butyl rubber’s tensile strength makes it suitable for use in the manufacturing of hoses and conveyor belts, where durability and flexibility are essential. 

Read more about rubber and silicone on our blog page or learn more about ILT, the world leader in manufacturing seals and septa here.