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Message | User | Date(yyyy-mm-dd) |
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Spectra/Mesh surface area | csax | 2004-04-22 | Click here to register. |
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| Is it possible to calculate the surface area of various mesh products, either from the dimensions routinely supplied or are data on surface area per unit weight available? | | |
| lil stevie | 2004-04-22 | Click here to register. |
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 | Spectra/Mesh products are simple square woven materials so the filtration surface area is just the area of the surface (i.e. the length times the width).
The % open area is the fraction of the surface area not over a fiber. This is the "holyness" of the material.
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| csax | 2004-04-23 | Click here to register. |
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| By "surface area" I meant the micro surface area presented by the summation of all of the individual surface areas of all of the fibers within a given macro surface area, i.e., the length times the width.
Thanks, |
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| lil stevie | 2004-04-23 | Click here to register. |
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| I'm still not sure exactly what you're looking for.
For example, part 148243 from http://www.spectrapor.com/0/7/8a.html is a
woven monofilament polyester with a 15 micron opening.
The % unrestricted area is 8%, so looking vertically down on a piece of this material, 8% of what you see would be holes, and 92% would be the polyester fibers.
This is woven from 37 micron diamter monofilament polyester. Looking at the curved surface area of the individual fibers would give a surface area greater than the cut area of a piece of material. This are would be about 190% of the cut area in this case.
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| csax | 2004-04-24 | Click here to register. |
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| Yes, that is exactly what I am looking for. Where did the 37 micron d. come from, it is not on the product page? Also how did you get to the 190% of the cut area.
Thanks, |
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| lil stevie | 2004-04-26 | Click here to register. |
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| The 37 micron is from an older catalog. The fiber diameters are not in the current catalog. Let me know if you need this information for a particular materal.
The 190% is an approximation:
- 15 micron approx. square opening + 1 fiber thickness on each side gives a unit cell of 52 micron on a side or 2704 square microns.
- Since the material is woven, where the warp and weft overlap only 1 of them is really exposed so the total exposed fiber length is about (52 + 37) = 89 micron per cell.
- Exposure from 1 side is 1/2 the circumference times the length. The circumference is (pi * d) = (3.14 * 37) = 116 micron. Half the circumference times the exposed length is (116 * .5 * 89) = 5162 square micron.
- Ratio of round area (5200) to cut area (2700) is 1.9.
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