Staple yarns form a very large part of the production of textiles both in the United States and around the world. In the past century, the manufacture of staple yarns has been driven by the motive to achieve desired tensile properties and aesthetics at a reasonable cost. The achievements in accomplishing the stated goals during the last century may be discussed in terms of the developments that occurred before the second world war and those between the 1940s and late '70s and the explosive growth that occurred in the last 20 years of this century, especially in the '90s.
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