describe the cultivation to yarn story of cotton
Answers
Ginning is accomplished by one of two methods. Cotton varieties with shorter staple or fiber length are ginned with saw gins. This process involves the use of circular saws that grip the fibers and pull them through narrow slots.
The seeds are too large to pass through these openings, resulting in the fibers being pulled away from the seed. Long fiber cottons must be ginned in a roller gin because saw gins can damage their delicate fibers. The roller gin was invented in India centuries ago and this concept is still used in modern gins. Long staple cottons, like Pima, separate from the seed more easily than Upland varietie. A roller gin uses a rough roller to grab the fiber and pull it under a rotating bar with gaps too small for the seed to pass.
The raw fiber, now called lint, makes its way through another series of pipes to a press where it is compressed into bales(lint packaged for market), banded with eight steel straps, sampled for classing, wrapped for protection then loaded onto trucks for shipment to storage yards, textile mills and foreign countries. The cotton industry has adopted a standard for a bale of cotton, 55 inches tall, 28 inches wide, and 21 inches thick, weighing approximately 500 pounds. A bale meeting these requirements is called a universal density bale. This is enough cotton to make 325 pairs of denim jeans.
Every bale of cotton is classed from a sample taken after its formation. The classing of cotton lint is the process of measuring fiber characteristics against a set of standards (grades). Classing is done by experts, called classers, who use scientific instruments to judge the samples of lint. All standards are established by the U.S. Department of Agriculture. Once the quality of the cotton bale is determined, pricing parameters are set and the lint may be taken to market. Cotton marketing is the selling and buying of cotton lint. Cotton is priced in cents per pound when sold and the price is negotiated according to the cotton's quality. After baling, the cotton lint is hauled to either storage yards, textile mills, or shipped to foreign countries. The cotton seed is delivered to a seed storage area. Where it will remain until it is loaded into trucks and transported to a cottonseed oil mill or directly for livestock feed.
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by the grining process the cotton fibres are separated from seeds. The continuous and constant mass of fibres hop together by the insertion of twist is known as a yarn. Bales is a raw cotton contains some amount of impurities termed as 'Trash'. in a cotton yarn the very first process use is spinning mile in the blow room. In this process such as opening, cleaning and mixing machines are done. Then for the reduction of an entangled is done by carding process. The carding machine in coil is formed by the delivered silver. Then from the drawing frame the elivere silver is transferred to the speed frame which is known as roving frame. The process such as creeling, drafting, twisting, winding, building up and doffing is involve in ring spining.The delivered yarn is wound on the yard bobbin.