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I work in the packaging industry and I need to know how to figure out the equation for the yield of polyethylene film. For instance if I began with a pound of polyethylene, how much film (say about 60 guage) would that yield (square footage).

2007-03-22 00:28:03 · 1 answers · asked by zoso63 2 in Science & Mathematics Mathematics

1 answers

You have 1 pound of polyethylene.
1 pound = 453.6 grams.

The density of polyethylene = 0.92 g/cm^3.

Using the formula : density = mass / volume,
we find that : volume = mass / density,
so, volume = 453.6 / 0.92 cm^3.

When the polyethylene is flattened out,
volume = area * depth.

60 gauge is a thickness of 0.0015 cm.
So the depth will be 0.0015 cm.

Now we can find the area.
Area = volume / depth
= (453.6 / 0.92) / 0.0015 cm^2.

But we need to convert this to square feet,
so we have to divide by (2.54 * 12)^2.

The final result is : 354 sq.ft, which would
make a square sheet nearly 19 ft to a side.

2007-03-22 02:43:21 · answer #1 · answered by falzoon 7 · 0 0

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