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Shrink Wrapping Cases
If you are shrink wrapping cases, you are a converter. You buy film by the pound and cut it off into sleeves before it goes into the shrink tunnel. If you buy 22" X 3 mils sheeting and have one ply on top & bottom, for practical purposes, you are making a bag (actually sleeves, prior to exposure to heat in the shrink tunnel.). Using the above example, your bags weigh 127.6 pounds per 1,000 packages. Multiply the weight per 1,000 packages by the price per pound to derive the cost per 1,000 cases.
If you cutoff one sheet at a time - simple. Just imagine a bag by folding either the width or length of the cutoff so there are two plys.
Divide the web width in half X cutoff X gauge ÷ 15 = # / 1,000 cutoff
Example: 22" width
3 mils
37" cutoff
Half of the web width or ½ of 22" :
11" X 37" X 3 ÷ 15 = 81.4 # per 1,000 cutoffs |
Half of the web cutoff or ½ of 37" :
18.5" X 22" X 3 ÷ 15 = 81.4 # per 1,000 cutoffs |
Example: 16.25" width
11.5" cutoff
2.2 mils
Half of the web width or ½ of 16.25" :
8.125" X 11.5" X 2.2 ÷ 15 = 13.70 # per 1,000 cutoffs
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Weight per 1,000 Cutoffs Calculator:
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