POLY BASICS- FORMULAS AND CONVERSIONS
 









 

 
CASE WEIGHTS:
Linear Low or Low Density
Width x Length x Mil ÷ 15 = LBS/1,000 bags
High Density:
Width x Length x Micron x .0027034 = LBS/1,000 bags

Convert Mil to Micron
Mil x 25.4 = microns 
(1 mil = 25.4 microns)

Microns to Mil
Microns ÷ 25.4 = Mil
Linear Feet of sheeting or tubing per pound 
30,000 square inches ÷ mil
 ÷ width
 ÷ 12= feet/lb.
 ÷ 2 (if tubing) 		 

For a Cover or Shroud:

Add approximately 4" to either width
(W) or depth (D) for a loose fit. For
length (L) add one half of depth (D)
actual length

For Poly Liners:
Add approximately 4" to either width
(W) or depth (D). For length add all of
the depth (D) to length plus 8" for
tying the top or over lapping.

Definitions:

Mil = thousandths of an inch (.000). Used for linear low or low density polyethylene.

Micron = one hundred thousandths of an inch (.000000). Used for high density polyethylene.

Linear Low Density Polyethylene (LLDPE). The proven standard resin used for manufacturing films and bags. Highly puncture and tear resistant make this the best choice where additional strength and tear resistance are required. 

High Density Polyethylene (HDPE). Bags made from this resin are available in lower gauges and are more temperature resistant. Will also hold moisture and odors better than LLDPE. 

Low Density Polyethylene (LDPE). The first type of polyethylene, it is now used only in a variety of shrink film applications.

Metallocene is a new generation of polyethylene resin using today's most advanced polymer materials. Metallocene offers outstanding toughness and tear resistance in a film that's thinner and tougher than LLDPE. Downgauging of up to 25 per cent is possible from conventional LLDPE.

                                       

 
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