How to control the tear strength of silicone material and whether its softness and hardness have a significant impact on it?

Various raw materials such as silicone and rubber have their own hardness and flexibility characteristics, and silicone rubber products are no exception. So why silicone materials can be used in various industries is because they have different soft and hard supports!

Different silicone products have their unique properties and process requirements. For example, silicone seals, silicone accessories, etc., the most suitable polymer and combination can be selected and reasonably adjusted to achieve a tight fit of softness and hardness. Sealing, shock absorption, waterproofing, oil resistance, etc. The physical properties of softness and hardness are closely related to the formula and raw materials of the product. The debugging of formulas can test various performance differences and functions, so it is still necessary to debug the softness and hardness, otherwise the error in softness and hardness may inevitably cause trouble!

Everyone knows that silicone materials have good tensile strength, and the indicator of tensile strength depends on the softness and hardness of the product. The general softness and hardness of silicone rubber product manufacturers are around 20-80 degrees. The lower the hardness, the better the product. The tensile strength is good, generally reaching around 300%, with the lowest being around 20%. However, the tensile strength still depends on the structure and shape of the product.

What silicone materials cannot do without is tear strength. Silicone rubber materials can tear due to stress factors. This is one of the inevitable phenomena in all soft colloidal materials, where cracks and fissures can cause damage due to stress. It accounts for a minority because normal hardness silicone rubber generally does not tear or break. Materials with higher hardness are prone to tearing due to crack propagation!

Therefore, the tensile strength and hardness of silicone products are important indicators of the material. In the vulcanization production process of silicone processing manufacturers, the larger the silicon molecular weight of the mixed rubber, the greater the effective cross-linking elongation stress. In order to obtain the specified tensile stress, for materials with smaller molecular weights, the crosslinking density can be appropriately increased. Any structural factor that can increase intermolecular forces. Increasing the density of silicone material can prevent the hardness of the product from affecting its tensile strength!