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Open Area of Rectangular Woven Mesh Formula
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(800) 440-MESH Phone: (360) 835-7507 Fax: (360) 835-8966 |
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% OPEN AREA = (1-ND) (1-nd) x 100
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| N = Wires Per Inch in Warp |
| n = Wires Per Inch in Shute |
| D = Diameter of Warp Wire |
| d = Diameter of Shute Wire |
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| EXAMPLE 1 |
| Assume the following: |
| 24 warp wires per inch |
| 70 shute wires per inch |
| The warp wire diameter
is 0.015" |
| The shute wire diameter
is 0.010" |
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| 1 |
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Multiply the warp
wire count (N) by the warp diameter (D). |
24
x 0.015 = 0.360 |
| 2 |
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Subtract the result
above from 1. |
1 - 0.360 = 0.640 |
| 3 |
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Multiply the
shute wire count (n) by the shute diameter (d). |
70
x 0.010 = 0.70 |
| 4 |
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Subtract the result
above from 1. |
1
- 0.70 = 0.30 |
| 5 |
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Multiply the result
from step 2 by the result from step 4. |
0.64 x 0.30 = 0.19 |
| 5 |
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Multiply the result
above by 100 to covert to a percentage. |
0.19 x 100 = 19% |
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| EXAMPLE 2 |
| Assume the following: |
| 72
warp wires per inch |
| 36 shute wires per inch |
| The warp wire diameter
is 0.008" |
| The shute wire diameter
is 0.07" |
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| 1 |
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Multiply the warp
wire count (N) by the warp diameter (D). |
72
x 0.008 = 0.576 |
| 2 |
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Subtract the result
above from 1. |
1 - 0.576 = 0.424 |
| 3 |
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Multiply the shute
wire count (n) by the shute diameter (d). |
36
x 0.013 = 0.468 |
| 4 |
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Subtract the result
above from 1. |
1
- 0.468 = 0.532 |
| 5 |
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Multiply the result
from step 2 by the result from step 4. |
0.424 x 0.532 = 0.225 |
| 5 |
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Multiply the result
above by 100 to covert to a percentage. |
0.225 x 100 = 22.5% |
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