Wednesday, June 27, 2012

Introduction to fully fashioned knitwear (Part 03)

Presented by: Rashedul al rashid
Email: .............

Fully Fashion Knitwear

Textile Fiber/ Fibre

Fibers are natural or chemical structure that can be spun into yarn.

Classification of Textile Fiber (Based on sourcing):

Properties of Fibers

Major three properties:
  1. Mechanical properties: This is the response to apply forces and recovery.
    • Abrasion resistance (fight to fraction)
    • Flexibility (bending capacity)
    • Stress (ability to take pressure)
  1. Absorption properties: This is a measure and the quantity of water vapor or liquid water or oil absorbed by fabric.
  • Water vapor absorption
  • Water absorption
  1. Thermal properties: The behavior of textile in the presence of heat or when exposed to a flame.
  • Heat resistance Or Specific heat
  • Note on Cotton fiber: Abrasion resistance of cotton fiber is poor. It takes long time to dry and temperature needs high. Its thermal capacity is high. Absorbing capacity is also high that’s why releasing capacity is poor. In case of polyester, nylon etc absorbing capacity is poor that’s why releasing capacity is high.
Fibers identification:

  1. Burning Test/ Flammability Test
(Hair burn smell)
(Petrol & plastic burn smell)
(Paper burn smell)
           2.      Chemical Test
(-) Alkalis
(+) Alkalis
(+) Alkalis
3.  Microscopic Test
(DNA or Cell Structure) 

  • Note on Wool fiber: Wool does not burn others and does not spread the fire. It just burn and shrink. It has good capability to resist acid. Its shrinkage percentage (%) is high that’s why we don’t prefer wet processing.
  • Note on Acrylic fiber: It is a petroleum product.
  • Note on Cotton fiber: When it burns smell seems paper burning because paper and cotton both made from vegetable material plant.

Classification of Textile Fiber (Based on fiber’s length):

To be continue....

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