There is a certain correlation between the hardness and tensile strength of liquid silicone, which is mainly reflected in the following aspects:
1. The influence of hardness on tensile strength
Very soft silicone (0°A):
It has high elongation and low tensile strength. Because of its very soft texture, it is easy to produce large deformation during stretching, but its ability to resist tensile fracture is relatively weak.
Soft silicone (5-10°A):
It has moderate elongation and tensile strength and is suitable for a variety of applications. While maintaining a certain degree of flexibility, this hardness of silicone also has good tensile strength and can resist a certain degree of tensile deformation.
Medium hardness silicone (20-30°A):
It is harder than soft silicone, but also has certain elasticity and compressibility. As the hardness increases, the tensile strength of silicone will also increase accordingly, and it can better resist deformation and fracture during stretching.
2. The reflection of tensile strength on hardness
Tensile strength is an important indicator to measure the ability of silicone materials to resist tensile fracture, and it also reflects the hardness of silicone to a certain extent. Generally speaking, silicones with higher hardness tend to have higher tensile strength because they can better maintain the stability of shape and structure when subjected to tensile force.
3. Other influencing factors
It should be noted that the tensile strength of silicone is not only affected by hardness, but also by many factors such as the type, formula, production process and test conditions of silicone. For example:
Silicone type: There are significant differences in tensile strength between different types of silicone. For example, the tensile strength of heat-cured solid silicone rubber is usually higher than that of liquid silicone rubber.
Formula ingredients: The type and amount of fillers, vulcanizers, plasticizers and other ingredients in the formula will affect the tensile strength of silicone.
Production process: Molding, vulcanization, demolding and other process steps will affect the tensile strength of silicone.
Test conditions: Different test methods and standards may lead to differences in test results. The tensile strength of silicone may also change when tested in high or low temperature environments.
In summary, there is a certain correlation between the hardness and tensile strength of liquid silicone, but it is not an absolute proportional relationship. In practical applications, it is necessary to select the appropriate silicone hardness and tensile strength according to specific usage scenarios and needs.