Textile Fibres

Question 1

Describe the refractive index of fibres

Answer 1

• high RI = acts as a converging lens
• low RI = acts as a diverging lens
• only slightly converge and diverge = BECKE LINE

Question 2

Define the terms ‘woven’ and ‘knitted’ fabrics

Answer 2

WOVEN - composed of two sets of yarns by interlacing the yarn

KNITTED - interlocking series of loops of one or more yarns

                    1. Warp = runs left to right 
                    2. Weft = runs up and down

Question 3

Define the term ‘yarn’

Answer 3

Continuous strands of fibres, filaments or material

Question 4

Define the terms ‘natural’, ‘manufactured’ fibres and ‘denier’

Answer 4

NATURAL FIBRE - any fibre that exists as a fibre in a natural state

MANUFACTURED FIBRE- any fibre derived from the process of manufacturing

DENIER - weight in grams of a 9000m of fibre