Which two synthetic fibers are known to be solution dyed?

The reason polyester and olefin are recognized as being solution dyed lies in the manufacturing process used for these fibers. Solution dyeing refers to the technique where color pigments are added to the polymer solution before the fiber is formed. This method allows for deep and uniform coloration throughout the entire fiber, making it highly resistant to fading and ensuring that the colors remain vibrant even in challenging environments.

Polyester is widely used in various textile applications due to its durability and ability to hold color well when solution dyed. Olefin, known for its stain resistance and moisture-wicking properties, benefits similarly from this dyeing process, enhancing its performance characteristics. Both fibers thus demonstrate improved performance in terms of color retention and longevity, which is crucial in carpet cleaning and maintenance.

In contrast, the other options represent fibers that do not typically undergo solution dyeing. Acrylic and nylon may be dyed after fiber formation, while rayon and acetate are cellulose-based fibers usually subjected to dyeing methods involving liquid dyes. Cotton and wool, being natural fibers, do not use solution dyeing either, as their dyeing process is fundamentally different. Understanding these distinctions highlights the unique advantages of using solution-dyed synthetic fibers in carpet cleaning and maintenance contexts.