PE Films Weights and Measures
Yield Auditor - English Units
Single Roll Cutoff with Wand and Heat Seal Pass Through: Roll on Top / Roll on Bottom

Complimentary Slide Rule Complimentary Slide Rule

Check Out the Yield Auditor for Heat Seal Pass Through: Roll on Top / Roll on Bottom

Single Roll Cutoff with Wand

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 in. X 2 mils sheeting and have one ply on top & bottom, for practical purposes, you are making a bag. Multiply the weight per 1,000 packages by the price per kilogram 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.

Example: 22 in. 2 mils 34 in. cutoff

Half of the web width or ½ of 22″: 11″ X 34″ X 2 mils÷15 = 49.86 # / 1,000 packages

Half of the web cutoff or ½ of 34″: 17″ X 22 X 2 mils ÷15 = 49.86 # / 1,000 packages

Example: Here is an example of film which is 7% “heavy” and well within the ± 10% industry tolerances. However, the film is produced “heavy” adding cost to the packages without the customer realizing the additional cost:

  • 22″
  • 2 mils (ostensibly)
  • 16″ od rolls
  • 77 pounds per roll
  • No footage marked on roll tags
  • one roll cutoff style
  • 34″ cutoff
  • 1,443 packages from 1 roll of film @ 77 pounds per roll
Step 1 measured cutoff = 34″
Step 2 1,443 packages from 1 roll of film
Step 3 weight per 1,000 packages = 49.86 # / 1,000
Step 4 77 # ÷ 42.53 # /1,000 = 1544 “theoretical yield” from 34.93 kg film
Step 5 compare actual (1,443) to theoretical (1,544)
In this example, the real cost per 1,000,000 cases assuming a price of $1 per pound is $53,350 not $49,860.

Heat Seal Pass Through: Roll on Top / Roll on Bottom

Example:

Here is a nearly perfect scenario:

  • 22″
  • 2 mils 16″ od rolls
  • 70 pounds per roll
  • No footage marked on roll tags
  • one roll on top one roll on bottom
  • 2 rolls of shrink film in a heat-sealed pass through fashion
  • 29″ cutoff
  • 3,309 packages from 2 rolls of film @ 70 pounds per roll
Step 1measured cutoff = 29″
Step 23,309 packages from 140 pounds of film (2 rolls x 70 # / roll)
Step 3weight per 1,000 packages = 42.53 # / 1,000
Step 4140 # ÷ 42.53 # /1,000 = 3284 “theoretical yield” from 140 # film
Step 5compare actual (3,309) to theoretical (3,292)

In this example, the yield is practically perfect and there were 17 “free” packages from “light film”.

Request Consultation

Please Complete The Form

or Call Now

314 – 968 – 1135