Among the many textile fibres, polyester and cotton are two of the most common in people's lives. They each have their own characteristics, but when it comes to elasticity, polyester performs better.
Cotton fibre is a natural fibre that is loved for its comfort and breathability. However, cotton fibres are relatively inelastic. When cotton fabrics are stretched by external forces, their ability to return to their original state is limited. For example, cotton T-shirts can easily become deformed and loose and lose their original shape after repeated wearing and washing. This is because the molecular structure of cotton fibres is relatively loose and lacks sufficient elastic support.
In contrast, polyester is a synthetic fibre with a compact molecular structure and a high degree of crystallinity. This allows polyester fibres to deform more elastically when stretched by an external force and to return to their original shape as soon as the tension disappears. For example, sportswear made of polyester can adapt well to the stretching and bending of the body during strenuous exercise, will not be easily deformed, and maintain good appearance and function. This good elasticity not only makes polyester fabrics more comfortable to wear, but also extends the life of the clothing.
In practice, people tend to choose the right fibre for different needs and scenarios. For example, in the production of casual clothing, the comfort and breathability of cotton is preferred; while in the production of sportswear, outdoor equipment and other products that require good elasticity and abrasion resistance, polyester is a more appropriate choice.
In short, polyester's elasticity is superior to cotton, which is determined by their different molecular structures and fibre properties. Understanding these differences can help us make more informed decisions when selecting garments and textiles, choosing the most suitable material for different usage scenarios and needs.
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