What is denier, or dpf?

Because of the nature of fiber extrusion, there is always some fluctuation in the diameter of the filaments. Fiber manufacturers use the measurement of denier (the weight in grams of 9000 meters of yarn) to define the diameter. The diameter of the yarn will fluctuate over this 9000 meters, so by weighing it and considering the density of the polymer, they are able to determine the average diameter.

Multifilament yarn is made up of numerous filaments. The denier of the yarn divided by its number of filaments is the denier per filament (dpf).

Converting Denier per Filament / Diameter in Microns

The conversions from dpf to microns will vary depending upon the density of the fiber in question. To convert to dpf from microns:

  • Look up the density of the fiber in g/cm3
  • Calculate dpf ÷ density
  • Calculate the square root of the resulting number
  • Multiply the square root X 11.89

Hate math? Click here for a document containing diameter conversions on some of our standard cut fiber products.

Converting Denier per Filament / Decitex

Decitex = denier per filament ÷ 0.9
Denier per filament = decitex X 0.9

Converting Measurements of Tenacity

cN/dtex = g/den ÷ 1.1325
cN/tex = g/den ÷ 0.11325
g/dtex = g/den X 0.9
g/tex = g/den X 9

Converting Millimeters / Inches

Millimeters = inches ÷ 0.03937
Inches = millimeters X 0.03937

MillimetersInches
0.50.02
10.03937
1.50.06
20.08
3.21/8
50.20
6.31/4
100.39
12.71/2
19.03/4
25.41
31.81-1/4
38.11-1/2
50.82
76.23

We are passionate about our customers.

Still trying to figure it out? Please don’t hesitate to ask for help.

Contact

We invite you to contact us to discuss your specific needs and how MiniFIBERS can help.

If you are planning to purchase our Fibrillated HDPE products, please visit our Distributors page to find your nearest source.

You must enable javascript to view this website