Commonly used fibre formulas and reference guides used by the textile fibre industry.


In this page

  1. Fiber Formulae
  2. Tenacity Conversion

Fiber Formulae

Name Description
Micronaire value of cotton (Micrograms per inch) Average weight of 1 inch of fibre in Micrograms (1/1000,000 gms)
Denier (for man-made fibres) Weight in gms per 9000 metres of fibre
Micron  (micro-metre)  (μm) (fibre diameter) (normally for Wool) 0.001 mm
Denier 0.354  x Micronaire value
Micronaire Value 2.824 x Denier
Fibre diameter ( μ )  11.3 x √ ( dtex / sp.gr) =  11.9 x √ (den / sp.gr)
Tenacity values: Kg / mm2 9 x (g/den) x Sp.gr. = RKM value x Sp.gr. = (g/tex) x Sp.gr.

 



Tenacity Conversion

Tenacity Conversions (Free Strength) g = gms

  g/den g/tex g/dtex cN/tex
g/den 1 ( g/tex ) / 9 ( g/dtex ) x 10 / 9 ( cN/tex ) x 0.113
g/tex ( g/den ) x 9 1 ( g/dtex ) x 10 ( cN/tex ) x 1.02
g/dtex ( g/den ) x 0.9 ( g/tex ) / 10 1 ( cN/tex ) x 0.102
cN/tex ( g/den ) / 0.113 ( g/tex ) / 1.02 ( g/dtex ) / 0.102 1