Home Economics - Fibres and Fabrics

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Author:
mshowley
ID:
219115
Filename:
Home Economics - Fibres and Fabrics
Updated:
2013-05-11 17:17:41
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Fibres Fabrics
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Description:
Fibres and Fabrics
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  1. How are fibres classified?
    • 1. Natural fibres - There are two types:
    •     Animal eg. wool and silk
    •     Plant eg. cotton and linen

    • 2. Man made fibres - There are two types:
    •     Synthetic eg. polyestser, nylon and acrylic
    •     Regenerated eg. viscose and acetate
  2. Describe how wool is produced
    1. Sheep are sheared

    2. Fleece is graded, washed and dried

    3. Wool is brushed and combed

    4. Strands are spun into yarn
  3. Name three positive properties of wool
    1. Warm

    2. Absorbent

    3. Does not burn easily
  4. Name two negative properties of wool
    1. Shrinks if washed at to high a temperature

    2. Can irritate the skin
  5. Describe how silk is produced
    1. Silkworm feeds on mulberry leaves

    2. Silkworm spins a cocoon of silk around itself

    3. Cocoons are soaked in water

    4. Silk threads are unwound from cocoons onto reels

    5. These are then woven into fabric
  6. Name five positive properties of silk
    1. Absorbent

    2. Crease resistant

    3. Light

    4. Smooth

    5. Drapes (falls) well
  7. Name three negative properties of silk
    1. Expensive

    2. Flammable

    3. Easily damaged by washing and moths
  8. Describe how cotton is produced
    Cotton balls are picked, cleaned, graded, combed and spun into yarn
  9. Name five positive properties of cotton
    1. Absorbent

    2. Cool

    3. Strong

    4. Washes and dries well

    5. Easy to dye and bleach
  10. Name two negative properties of cotton
    1. Creases, shrinks and burns easily

    2. Can be damaged by mildew (mould)
  11. Describe how linen is produced
    1. Flax plants are grown in wet countries eg. Ireland

    2. Flax stems are soaked until the woody part rots

    3. Fibres are separated from the woody stem

    4. They are then bleached and spun into yarn
  12. Name four positive properties of linen
    1. Absorbent

    2. Cool

    3. Strong

    4. Washes well
  13. Name four negative properties of linen
    1. Expensive

    2. Creases and shrinks easily

    3. Difficult to dye

    4. Damaged by mildew (mould)
  14. Describe how regenerated fabrics are produced
    1. Cellulose from trees or cotton waste is mashed

    2. Chemicals are added

    3. Heat is applied

    4. Liquid is forced through a spinneret

    5. Yarn is formed

    6. Yarn is left in long filaments to make sily fabrics or twisted and cut to make soft fabrics
  15. Name two positive properties of regenerated fabrics
    1. Absorbent

    2. Cool to wear
  16. Name one negative property of regenerated fabrics
    Tears easily
  17. Describe how synthetic fabrics are produced
    1. Synthetic fabrics are made from oil and coal

    2. Other chemicals, air and water are added

    3. The mixture is forced through a spinneret to form long, continuous filaments

    4. Continous filaments can be made into silky fabrics or chopped and twisted to make soft yarn
  18. Name three positive properties of synthetic fabrics
    1. Strong

    2. Hardwearing

    3. Warm
  19. Name two negative properties of synthetic fabrics
    1. Flammable

    2. Do not absorb mixture
  20. List two ways fibres can be made into fabrics
    1. Weaving

    2. Knitting
  21. What is the function of stain repellant?
    It stops stains from soaking into fabric
  22. What is the function of flame resistant?
    It stops the fabric from catching fire
  23. What is the function of brushing?
    It makes fabric feel warmer and softer
  24. What is the function of anti-static?
    It stops clothes from clinging
  25. Describe how you would identify wool using a burning test
    1. It burns slowly

    2. It smells of burning hair

    3. Left with dark ash
  26. Describe how you would identify linen using a burning test
    1. It burns quickly

    2. It smells of burning paper

    3. Left with paper like ash
  27. Describe how you would identify nylon using a burning test
    1. It melts when burned

    2. It smells of celery when burned

    3. Left with a hard bead

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