Table 1 (Film Properties)

 

LDPE / HDPE / Metallocene / Table 2 (Additives)
 


General Guide to the Effects of LDPE Resin Physical Properties on film’s Mechanical Properties

 

Film Property

As Melt Index Increases

As Density Increases
Chemical Resistance

Remains the same

Increases
Clarity

Increases

Increases
Elongation at rupture Decreases Decreases
Film drawdown Increases Increases
Film impact strength (toughness) Decreases Decreases
Flexibility Decreases Remains the same
Gloss Increases Remains the same
Heat resistance (softening point) Decreases Increases
Impermeability to gases/liquids Remains the same Increases
Low temperature flexibility Decreases Decreases
Melt viscosity Decreases Increases
Mechanical flex life Decreases Decreases
Resistance to film blocking Decreases Increases
Stress cracking resistance Decreases Decreases
Tensile strength at rupture Decreases Increases

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