Polypropylene (P/P) Films Blown and Cast



High Temperature resistance (melt point 320 oF to 329 oF)
Higher stiffness (than LDPE)
Available in blown or cast.
Excellent clarity in cast films, good clarity in blown films.
Available in .003" to .020" thickness (limited by width of the film)
Available in various colors (At this time blown films only)
Property Comparison 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. 0C)

3

4

-7

Area Factor (yield - in2/lb)

31,000

30,500

29,800

Heat Resistance (0C)

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/day)
H2O (gm/100in2/day)

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.
 


RFQ