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Fiberglass yarn Nomenclature

 

 

Fiber Designation Glass-Cut

 

 

Nominal Filament Diameter (Microns)

 

 

Nominal Filament Diameter (Inches)

B

3.5

0.00012

C

4.5

0.00018

D

5

0.00021

DE

6

0.000256

E

7

0.00028

G

9

0.00037

H

10

0.00043

K

13

0.00051

US Glass System - Example: ECG 150 3/2 3.0S

 The example above, identifies the following yarn:

                   E = electrical glass
                   C = continuous filament
                   G = average filament diameter of 0.00037"(9 Micron)
                   150 = 15,000 yards/lb. nominal bare glass in basic strand.
                   3/2 = two plies of 3-strand construction (total 6 basic strands)
                   3.0S = the number of turns per inch in the twist of the final yarn in the S direction

 

 

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