Why is polyester often added to cotton cloth, even if only in tiny few percentage quantities?

Question

I often see on clothes, bags, sheets, etc. a few % of polyester in the cotton cloth label. What does this mean and why do they do it? Are they weaving one out of every few strands out of polyester? Or is the fiber itself made of a few % polyester in composition? And what does it do for the cloth?

In: 1242

Answer 1

With just some polyester added to the cotton, it makes the over all fabric less susceptible to pilling (where those little fabric bumps/balls form) and static.

Plus generally they dont wrinkle as much