High Temperature resistance (melt point 3200 F to 3290 F)
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 | 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.
| 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 | 500 | 10 | 300 |
| MD | 30 | 5 | 200 |
| Surface Treatment (dyne) | 36 - 38 | 36 – 38 | 42+ |
| Barrier: O2 (cc/100 in2 /day) |
220 | 120 | 500 |
| H2O (gm/100 in2/day) | 0.8 | 0.4 | 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.
Cast film process involves extrusion of polymers melted through a flat die to form a thin, molten sheet or film. This film is "pinned" to the surface of a chill roll, typically water-cooled and chrome-plated by a blast of air from an air knife or vacuum box. The film quenches immediately and then has its edges slit prior to winding.
Because of the fast quench capabilities, a cast film generally has much better optics than a blown film and can be produced at higher line speeds. Also, the thickness tolerance can be maintained within (+/-) 5%, unlike (+/-) 15% in Blown process.
However, it has the disadvantage of higher scrap due to edge trim and very little film orientation in the cross-direction.
We can produce natural or colored films with, Cast HDPE, Cast LDPE, Cast Metallocene, Cast PP (CPP) and Cast Liner Low Density (LLDPE) grades. Our maximum width is 62” and 0.002”thru 0.020” thickness. We can also supply film with embossing on one side.
We are capable of co-extruding up to three layers (A:B:C, A:B:A, A:B or B:C) which can provide additional functional, protective, and decorative properties
Because of the custom nature of Cast films, it is not possible to provide TDS (Technical Data Sheet) or typical physical properties.
Typical Cast Gauge profile is displayed below: (0.020” LDPE)
Mailing Address:
P.O. Box 1600
Petersburg, VA 23805-0600
Physical Address:
10921 Lamore Drive
Disputanta, VA 23842-4602
Toll Free: 888-706-4600
Tel: 804-862-8700
Fax: 804-862-5100
E-mail: sales@blueridgefilms.com
Mailing Address:
P.O. Box 1600
Petersburg, VA 23805-0600
Physical Address:
10921 Lamore Drive
Disputanta, VA 23842-4602
Toll Free: 888-706-4600
Tel: 804-862-8700
Fax: 804-862-5100
