What is Vulcanized Molded Silicone Rubber

Vulcanized silicone rubber is a process in which the long-chain molecules of silicone rubber are cross-linked through a chemical reaction to form a three-dimensional network structure. This process typically requires specific temperatures, pressures, and the action of catalysts.

In the field of materials science, silicone products have been widely used in various fields such as medical devices, electronic products, and kitchen utensils, thanks to their excellent elasticity, temperature resistance, and chemical stability. However, untreated silicone products often fail to meet the requirements of practical applications. Vulcanization, as a crucial step in the production process of silicone products, is essential for enhancing their performance. So, why is vulcanization necessary for silicone products?

Vulcanization is the key transformation process from raw materials to finished products for silicone products. Untreated silicone has a linear or branched molecular chain structure, which is relatively soft and unstable. Under force or temperature changes, this type of silicone is prone to deformation or even rupture. Through vulcanization, vulcanizing agents promote cross-linking reactions between silicone rubber molecules, forming a stable three-dimensional network structure. This structure significantly enhances the mechanical strength, heat resistance, and cold resistance of silicone products, as well as their chemical resistance. Therefore, vulcanization is the key transformation from soft and easily deformed to tough and durable for silicone products.

The improvement in the physical properties of silicone products after vulcanization is particularly significant. Vulcanized silicone products see a substantial increase in hardness, tensile strength, elongation at break, and dimensional stability. These enhancements make silicone products more durable and reliable during use. Additionally, vulcanization significantly reduces the permanent compression deformation of silicone products, improving their elasticity and tear resistance. This means that whether used as seals, medical devices, or kitchen utensils, vulcanized silicone products can maintain stable performance under various extreme conditions.

Vulcanization also helps eliminate harmful substances in silicone products. During the initial vulcanization process, residual catalysts and other low molecular compounds may be produced. These substances can affect the safety and applicability of silicone products, such as causing odors and reducing transparency. Secondary vulcanization can further remove these harmful substances, ensuring that silicone products meet strict hygiene and environmental standards. This is particularly important for applications requiring high safety standards, such as food packaging and medical devices.

Silicone Vulcanization

Molded Silicone Procedure

Dongguan Hongty Insulation Materials Co., Ltd., established in 2013, has always adhered to the basic principles of “reasonable pricing,” “high-quality products,” “on-time delivery,” and “good reputation service.” The factory covers an area of 3000㎡, equipped with more than 20 types of machinery and equipment, and annually produces over 600 tons of various silicone products. The products are sold to Europe, America, Africa, Asia, and other countries and regions.
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Vulcanization treatment is an indispensable step in the production process of silicone products. Through vulcanization, the performance of silicone products is significantly improved, including mechanical strength, heat resistance, cold resistance, chemical resistance, and processing performance.