oljeförlängda

Oljeförlängda is a Swedish term that translates to "oil-extended" in English. It refers to a process or product where a significant amount of oil is incorporated into a material, typically rubber or plastics, during or after its manufacturing. This oil is not a processing aid that is later removed but rather becomes an integral part of the final compound.

The primary purpose of oil extension is to reduce the overall cost of the material. The oil used is generally less expensive than the base polymer. By adding oil, manufacturers can maintain a desired volume of material at a lower price point. Beyond cost reduction, oil extension can also modify the physical properties of the material. It can improve flexibility, low-temperature performance, and processability, making the material easier to handle and shape. In some applications, it can also contribute to a softer feel or a degree of tackiness.

However, oil extension can also have drawbacks. The added oil can potentially reduce the mechanical strength, such as tensile strength and abrasion resistance, of the material. It can also affect the long-term durability and resistance to heat aging or chemical attack. The type and amount of oil used are critical factors that determine the extent of these property changes. Different types of oils, such as naphthenic, paraffinic, or aromatic oils, are chosen based on their compatibility with the polymer and the desired performance characteristics. The practice of oil extension is common in the tire industry, footwear manufacturing, and in various molded rubber goods.