How do humidity levels impact the dimensional stability of polyester fabric?

Polyester fabric is widely known for its durability and resistance to wrinkles, but its dimensional stability can be influenced by humidity levels. When exposed to high humidity, polyester fibers absorb minimal moisture compared to natural fibers, which helps maintain its shape and size. However, excessive moisture over time may cause slight expansion or contraction, though the effect is generally less pronounced than in materials like cotton or wool. Manufacturers often treat polyester with coatings or blends to enhance its moisture resistance, ensuring consistent performance in varying climates. Understanding these factors is crucial for applications in apparel, home textiles, and industrial uses where stability is key. Proper care and storage can further mitigate any potential humidity-related changes.