Property Comparion Reference CPP vs BOPP vs LDPE

General Comparison (using "Good" as the benchmark)

Property CPP BOPP LDPE
Tear Strength Better Good Best
Modulus (stiffness) Better Best Good
Low Temp Impact Resistance Better* Good Best
Dimensional Stability Best Good Better
Haze Better Best Good
Heat Sealing Better Good** Best
Barrier Better Best Good
Area Factor (Yield) Best Better Good

* Some PP impact polymers have excellent low temperature impact but generally have high haze.
** dependent upon seal coating. uncoated BOPP does not seal.

Typical Properties (1.0 mil film) 

Property CPP 1 BOPP 1 LDPE 2
 Haze (%) 2 - 3.5 1 - 2  5+
 Gloss (%) 86 - 89 88 - 92 75 - 80
 Elongation (%) 600 200 400
 Modulus/Stiffness (kpsi) 75 - 130 350+ <55
 Impact (Glass Transition Temp. °C) 3 4 -7
 Area Factor (in2/lb) 31,000 30,500 29,800
 Heat Resistance (°C) 145 - 160 150 - 160* <100
 Tensile Strength (psi) 7,000 15,000 3,000
Tear Strength (g/mil)
TD
MD

500
30

10
5

300
200
Surface Treatment (dyne) 36 - 38 36 - 38 42+
Barrier: O2 (cc/100in2/24hr)
H2O (g/100in2/24hr)
220
0.8
120
0.4
500
1.3

1 - Cast Film Extrusion
2 - Blown Film Extrusion
* heat resistance of base polymer, dimensional stability may be affected depending upon orientation heat set temperature
.