Copol | Property Comparison Reference

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

CPP1

BOPP²

LDPE²

Haze (%)

2 - 3.5

1 - 2

Gloss (%)

86 - 89

88 - 92

75 - 80

Elongation (%)

600

200

400

Modulus/Stiffness (kpsi)

75 - 130

350+

Impact (Glass Transition Temp. °C)

-7

Heat Area Factor (in²/lb)

31,000

30,500

29,800

Heat Resistance (°C)

145 - 160

150 - 160*

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

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

General Comparison (using "Good" as the benchmark)

* 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)

1 - Cast Film Extrusion2 - Blown Film Extrusion* heat resistance of base polymer, dimensional stability may be affected depending upon orientation heat set temperature

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

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