Pro-fax SR257M by LyondellBasell is a polypropylene (PP) random copolymer containing antistatic agent. It is insoluble in water and exhibits excellent see-through & contact clarity, good colorability and low temperature toughness. It is suitable for processing by blown film extrusion, extrusion blow molding, thermoforming, and compression molding. Pro-fax SR257M is recommended for flexible & rigid packaging such as bags & pouches, caps & closures, clear containers, bottles for consumer goods, film wrap, food packaging film, lamination film, and twist wrap film. It complies with the requirements of FDA 21 CFR 177.1520, RoHS, REACH, Regulation 1935/2004/EC, Regulation 2023/2006/EC (GMP), Regulation (EC) No. 1272/2008, and Regulation 10/2011/EC (PIM).
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Pro-fax SR257M properties
Flammability properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Auto-ignition Temperature | 0.0 Visible After Login | Visible After Login | Visible After Login |
Mechanical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| 1% Secant Modulus | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Elongation at Yield | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Impact Strength, Notched Izod | 0.0 Visible After Login | Visible After Login | Visible After Login |
Optical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Haze | 0.0 Visible After Login | Visible After Login | Visible After Login |
Other properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Tensile Strength at Yield | 0.0 Visible After Login | Visible After Login | Visible After Login |
Physical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Density | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index) | 0.0 Visible After Login | Visible After Login | Visible After Login |
Thermal properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Heat Deflection Temperature (HDT), Unannealed | 0.0 Visible After Login | Visible After Login | Visible After Login |



