Plastics Permeability Info?

Question

Does anyone know where I could find information about the permeability of HDPE, LDPE, UHDPE, and ULDPE?

Basically, I want to know how long a pressure would last in a sealed container with different plastic grades.

Answer 1

Properties for Polyethylene - Low Density Film

Property Value

Dielectric Strength @25µm thick kV mm-1 200

Dissipation Factor @1MHz  0.0003

Elongation at Break % 100-700

Heat-sealing Temperature C 120-204

Initial Tear Strength g µm-1 1.2-10.3

Permeability to Carbon Dioxide @25C x10-13 cm3. cm cm-2 s-1 Pa-1 10

Permeability to Hydrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 8

Permeability to Nitrogen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 0.7

Permeability to Oxygen @25C x10-13 cm3. cm cm-2 s-1 Pa-1 2

Permeability to Water @25C x10-13 cm3. cm cm-2 s-1 Pa-1 70

Permeability to Water @38C x10-13 cm3. cm cm-2 s-1 Pa-1 120