Copper ammonia yarn is an artificial cellulose fiber, which absorbs moisture and breathes air, and is generally used for high-grade fabrics or linings; Polyester fiber, that is, polyester fiber, is a synthetic fiber extracted from petroleum and then synthesized artificially, which has poor hygroscopicity.

Copper ammonia yarn is a kind of rayon fabric. Its material is very light, very soft and smooth, and has good air permeability. Because the cohesive force of long fibers of copper ammonia yarn is not as good as that of other blended fiber fabrics, it may become a doubling yarn under the action of other forces.

Copper ammonia yarn belongs to the category of rayon. It is made of high-quality wood pulp and cotton linter pulp as raw materials, which are dissolved in copper ammonia solution of copper double salt solution composed of ammonium copper hydroxide to make spinning solution, and then mixed, filtered and defoamed.

Polyester fiber is a synthetic fiber obtained by spinning polyester condensed from organic dibasic acid and diol. Invented in 194 1, it is the most variety of synthetic fibers at present.