Cotton Fibres and Ginning Process

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Questions and Answers

What are the two types of fibres found in cotton?

  • Staples and linters (correct)
  • Twists and wicks
  • Yarns and gauze
  • Felt and compresses

Which method is used to separate fiber from seeds in the cotton production process?

  • Compressing
  • Spinning
  • Weaving
  • Ginning (correct)

What is the nest of fibres surrounding the cotton seed called?

  • Madras
  • Linters
  • Gin
  • Trichomes (correct)

What was the earliest method of cotton ginning known to date?

<p>Hand roller gin (D)</p> Signup and view all the answers

Which product is NOT made from linters after the fiber separation process?

<p>Salad oil (C)</p> Signup and view all the answers

What gives yarn made from cotton fibres cohesion and strength during spinning?

<p>Natural wax (B)</p> Signup and view all the answers

What distinguishes C.sativa subsp.indica from C.sativa in terms of fiber quality?

<p>Use for recreational and medicinal purposes (C)</p> Signup and view all the answers

Which fiber is known for its use in sails and rope by the British and American Navy?

<p>Hemp (D)</p> Signup and view all the answers

What is the primary use of female buds from C.sativa subsp.indica?

<p>Recreational and medicinal purposes (B)</p> Signup and view all the answers

Which mechanical process removes the woody portion of the stalks in flax fiber production?

<p>Scutching (C)</p> Signup and view all the answers

Which type of dyes are particularly attracted to cellulose fibers like cotton and rayon?

<p>Direct dyes (D)</p> Signup and view all the answers

What is the significance of retting in the fiber separation process?

<p>Decomposes pectin binding fibers together in flax (C)</p> Signup and view all the answers

Which plant is known for its inelastic fibers that are moisture-resistant, quick-drying, and buoyant?

<p>Kapok (C)</p> Signup and view all the answers

Which fiber is characterized by being used as stuffing for pillows, mattresses, and upholstery due to its light weight?

<p>Kapok (D)</p> Signup and view all the answers

Which plant produces fibers known as 'coir' which are used in products like floor mats, brushes, and mattresses?

<p>Coconut (A)</p> Signup and view all the answers

Which fiber crop is characterized by long, soft, shiny fibers ideal for burlap, curtains, carpets, and twine?

<p>Hemp (C)</p> Signup and view all the answers

Which fiber separation process involves the use of warmth and moisture for successful cultivation?

<p>Hemp decortication (D)</p> Signup and view all the answers

Which method is commonly used to separate cotton fibers from the cotton seeds?

<p>Ginning (C)</p> Signup and view all the answers

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Study Notes

Cotton Fibres

  • Two types of fibres found in cotton: longitudinal and transverse fibres.

Cotton Production Process

  • Fibre separation from seeds involves the use of ginning method.

Linters and Fibre Separation

  • The nest of fibres surrounding the cotton seed is called a linters.
  • Linters are not used to make yarn or thread after the fibre separation process.

History of Cotton Ginning

  • The earliest method of cotton ginning known to date is the hand-roller gin.

Properties of Cotton Fibres

  • Yarn made from cotton fibres owes its cohesion and strength during spinning to the waxy substance called pectins.

Varieties of Cotton

  • C.sativa subsp.indica is distinguished from C.sativa by its shorter, finer, and more uniform fibre quality.

Historical Uses of Fibres

  • Jute fibres were used in sails and rope by the British and American Navy.

Uses of Cotton Buds

  • Female buds from C.sativa subsp.indica are primarily used for producing seeds.

Flax Fibre Production

  • The mechanical process that removes the woody portion of the stalks is called retting.

Cellulose Fibres

  • Direct dyes are particularly attracted to cellulose fibers like cotton and rayon.

Significance of Retting

  • Retting is a process that separates fibres from the woody portion of the stalks, making it a crucial step in fibre production.

Inelastic Fibres

  • Kapok fibres are known for being inelastic, moisture-resistant, quick-drying, and buoyant.

Fibres for Upholstery

  • Kapok fibres are used as stuffing for pillows, mattresses, and upholstery due to their light weight.

Coir Fibres

  • Coir fibres are produced from coconut plants and are used in products like floor mats, brushes, and mattresses.

Jute Fibres

  • Jute fibres are long, soft, shiny, and ideal for burlap, curtains, carpets, and twine.

Flax Fibre Separation

  • The fibre separation process that involves the use of warmth and moisture for successful cultivation is called retting.

Cotton Ginning Methods

  • The most commonly used method to separate cotton fibres from seeds is the saw-gin method.

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