The hardness of mold silicone refers to the ability of silicone rubber material to resist being pressed into the surface by hard materials, that is, the hardness of silicone rubber. The hardness range of silicone rubber from 10 to 80 is Shore hardness, which allows designers to freely choose the required hardness to achieve the best specific function. Mixing polymer matrix, fillers, and additives in different proportions can obtain different intermediate hardness values. Similarly, the time and temperature of heat curing can also change the hardness without damaging other physical properties. What is the appropriate hardness and strength for the mold?
Tensile strength: Tensile strength refers to the force required per unit of measurement when a rubber material is torn. The results showed that the tensile strength of solid silicone rubber was 4.0-12.5 MPa, fluorosilicone rubber was 8.7-12.1 MPa, and liquid silicone rubber was 3.6-11.0 MPa.
Tear strength: When a force is applied to a gap, the resistance that hinders the gap or its expansion is called tear strength. Hot vulcanized solid silicone rubber will not tear even under extremely high torsional stress after shearing. The tear strength range of solid silicone rubber is 9 to 55 kn/m, the tear strength range of fluorosilicone rubber is 17.5 to 46.4 kn/m, and the tear strength range of liquid silicone rubber is 11.5 to 52 kn/m.
Organic silicon materials have good tensile strength, and the tensile strength index depends on the hardness and softness of the product. Generally speaking, the softness and hardness of silicone rubber product manufacturers are around 20-80 degrees. The lower the hardness, the better the tensile strength of the product. The tensile strength can generally reach around 300%, with a minimum of around 20%. However, this depends on the structure and shape of the silicone product.
This is the tear strength, which is essential for silicone rubber materials. Silicone rubber materials will tear under stress and other factors, which is one of the inevitable phenomena of all rubber materials. Cracks caused by cracks and stress cracking account for a small number, because silicone rubber with conventional hardness will not tear and break, while materials with higher hardness are likely to crack, and the tensile strength and hardness of silicon gel products are important indicators of materials. In the vulcanization production process of silicone processing manufacturers, the larger the molecular weight of organosilicon compounds, the greater the effective cross-linking tensile stress. In order to obtain the specified elongation stress, the crosslinking density of small molecular weight materials can be appropriately increased. All structural factors that can increase intermolecular forces. Increasing the density of organic silicon materials can prevent the hardness of the product from affecting its tensile strength!
Your message must be between 20-3,000 characters!
