Additiovulkanointi

Additiovulkanointi, also known as secondary vulcanization, is a process used in rubber manufacturing to modify and enhance the properties of vulcanized rubber. It involves applying an additional vulcanization step after the initial curing process to further cross-link polymer chains within the rubber. This secondary vulcanization is typically conducted through heat, sometimes combined with pressure, to improve characteristics such as elasticity, durability, and resistance to aging or environmental degradation.

The primary purpose of additiovulkanointi is to refine the performance of rubber products used in demanding applications, such as seals, hoses, tires, and industrial components. By subjecting the rubber to additional heat treatment, manufacturers can achieve a more uniform cross-linking network, which can help mitigate issues such as cracking, swelling, or weakening over time.

The process can be applied to various types of vulcanized rubber, including natural rubber and synthetic variants like styrene-butadiene rubber or ethylene-propylene-diene rubber. It is especially useful when specific mechanical or chemical properties are required, or when extending the lifespan of rubber components.

Additiovulkanointi must be carefully controlled to prevent over-vulcanization, which can lead to brittleness or loss of flexibility. Typically, the process parameters are optimized based on the rubber compound, intended application, and desired final properties.

This technique is a valuable tool in rubber technology, aiding in the production of high-performance, long-lasting rubber products. Its development has contributed to advances in industries such as transportation, manufacturing, and construction, where material reliability and longevity are crucial.