Construction of Performance Testing and Quality Control System for Silicone Rubber

In the production and application of silicone rubber, accurate performance testing and a complete quality control system are of crucial importance. This not only relates to whether the product can meet the usage requirements of different industries but also affects the reputation and market competitiveness of enterprises.
The performance testing of silicone rubber covers many aspects. First is the mechanical property testing, including the determination of indicators such as tensile strength, tear strength, and elongation at break. Tensile strength reflects the ability of silicone rubber to resist tensile failure. By applying a tensile force to a standard specimen with a tensile testing machine and recording the maximum load at the time of fracture, the tensile strength can be calculated. Tear strength measures the resistance of silicone rubber to tearing. Common testing methods include right - angle tearing and trouser - shaped tearing, and it is evaluated by measuring the force required to tear the specimen. Elongation at break indicates the elongation of silicone rubber at the time of fracture and is an important parameter to measure its elasticity. These mechanical property indicators play a key role in evaluating the applicability of silicone rubber in applications such as sealing, shock absorption, and structural materials.
Thermal property testing is also an important part. The thermal stability and heat - aging resistance of silicone rubber directly affect its use in high - temperature environments. Thermogravimetric analysis (TGA) can be used to study the mass change of silicone rubber during the heating process, thereby evaluating its thermal decomposition temperature and thermal stability. Dynamic mechanical analysis (DMA) can measure parameters such as storage modulus and loss modulus of silicone rubber at different temperatures, understand its thermomechanical properties under dynamic loads, and provide data support for its application in high - temperature working conditions. For example, in applications such as automotive engine seals and heat - dissipation components of electronic devices, accurately grasping the thermal properties of silicone rubber is the basis for ensuring product reliability.
In addition, the chemical corrosion resistance, electrical insulation properties, and air permeability of silicone rubber also need to be tested accordingly. The chemical corrosion resistance test is carried out by immersing silicone rubber specimens in different chemical media, observing changes in their appearance, quality, and performance, and evaluating their stability in chemical environments. The electrical insulation property test mainly measures parameters such as volume resistivity, surface resistivity, and dielectric constant of silicone rubber to determine its applicability in the field of electrical insulation. The air permeability test is used to measure the gas - permeation ability of silicone rubber and is of great significance in fields such as food packaging and medical applications.
In order to ensure the stability and consistency of silicone rubber product quality, it is essential to build a complete quality control system. In the raw material procurement process, strictly control the quality of raw materials such as siloxane monomers, cross - linkers, and catalysts, and conduct a comprehensive inspection of each batch of raw materials to ensure that they meet production requirements. During the production process, key parameters such as reaction temperature, pressure, and time are accurately controlled through an automated control system to reduce the impact of human factors on product quality. At the same time, multiple quality inspection points are set up to conduct real - time inspections of semi - finished and finished products, and quality problems in the production process are promptly discovered and corrected. For example, in the silicone rubber mixing stage, indicators such as the hardness and plasticity of the mixed rubber are tested; in the molding stage, the dimensional accuracy and appearance quality of the product are inspected.
Before the product leaves the factory, a comprehensive performance sampling inspection and quality evaluation are carried out. According to relevant national standards, industry standards, and special requirements of customers, strict performance testing and quality inspection are carried out on silicone rubber products. Only products that pass all inspection items are allowed to leave the factory. In addition, a complete quality traceability system is established. Once a quality problem occurs in the product, information such as the raw material batch, production equipment, operator, and production process can be quickly traced, which is convenient for taking timely measures to solve the problem and providing a basis for subsequent process improvement. Through such a complete performance testing and quality control system, the quality of silicone rubber products can be effectively guaranteed, and the healthy development of the silicone rubber industry can be promoted.


High Tear Strength Precipitated Type Silicone Rubber