Reasons for Poor Tensile Strength of Mold Liquid Silicone & Solutions
Reasons for Poor Tensile Strength of Mold Liquid Silicone & Solutions
Poor tensile strength of mold liquid silicone mainly results from material formulation, operation process and environmental factors, which loosen molecular structure and reduce tear/fracture resistance. Common reasons fall into four categories.
1. Material and Formulation Issues
Low-quality silicone or improper proportioning (e.g., excessive fillers, lack of tear-resistant additives) reduces purity and elasticity. Condensation silicone has lower tensile strength than addition silicone, so wrong scenario selection also causes insufficient tensile strength.
2. Improper Operation Process
Inaccurate rubber-curing agent proportioning or insufficient stirring leads to uneven/incomplete curing and reduced tensile strength. Incomplete vacuuming leaves internal bubbles, which easily break under force and affect overall performance.
3. Unsuitable Curing Environment
Low temperature slows curing and causes incompleteness; high humidity triggers silicone hydrolysis and damages molecular structure—both reduce tensile strength. Premature demolding before full curing also impairs mechanical properties.
4. Other Influencing Factors
Long-term storage aging, contact with oil or corrosive substances deteriorate silicone, reducing elasticity and tensile strength. To avoid this, use high-quality silicone, standardize operations, control curing environment, and extend mold life.
Follow Jiajinghong Silicone for more silicone information and application solutions.
Productos relacionados
Building H3, Shenye Zilinshan, Shengping Community, Longcheng Street, Longgang District, Shenzhen
Request Quote
