How much Stretchfilm

Guide to Stretchwrap usage based upon 4’ Round Bale Silage / Haylage

Film Specification Approx. No. Bales Per Roll (4’ Bale)
6 Layers 4 Layers
500mm Wide x 1800m Long 17 26
750mm Wide x 1500m Long 22 33

Guide to Stretchwrap usage based upon Mini Bales Silage / Haylage

File Specification Approx. No. Bales Per Roll (Mini Bale)
 6 Layers 4 Layers
 1800m Long x 250mm Wide 17 26

How to calculate film usage
The number of bales that can be wrapped from a single roll of stretchfilm can be accurately calculated,
provided the following points are adhered to:

  • THE BALES ARE 1.2m X 1.2m AND OF UNIFORM SHAPE.
  • THE WRAPPER IS CALIBRATED FOR THE CORRECT NUMBER OF TURNS.

4 film layers 24 turns (500mm) or 16 turns (750mm)
6 film layers 36 turns (500mm) or 24 turns (750mm)

  • THE FILM IS ACCURATELY AND CORRECTLY STRETCHED TO 70%.

If all the parameters are correct (bale size, film stretch of 70% and correct number of bale revolutions),
then the following figures will always be achieved.

Any variation to the above parameters will cause numbers to differ.

Given a standard bale size of 1.2m x 1.2m, applying film at 70% stretch using the correct number of turns for
the film width used (24 turns for 500mm and 16 turns for 750mm for 4 layers of film), the calculations are as follows:

A – BALE CIRCUMFERENCE (sum length of all four sides of the bale).
B – TURNS OF THE BALE.
C – FILM LENGTH AFTER STRETCH (film roll length plus 70%).

Multiply A x B and divide into C

Film Width A B C Bales Per Roll
500 mm 4.8m
(1.2m x 4 layers)
24 3,060m
(1,800m + 70%)
26
750 mm 4.8m
(1.2m x 4 layers)
16 2,550m
(1,500m +70%)
33
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