This website uses cookies to improve service quality. You will find more information about cookies on the privacy policy page.

Hazy Biaxially Oriented Polyester Film 250µm (ES301232)



A hazy untreated polyester film with excellent flatness and high roughness on both surfaces for good processability



Thickness t

0.25 mm


Density ρ

1.4 g/cm³ at 20 °C

ASTM D1505

Film yield Yfilm

2.9 m²/kg at 20 °C

Surface density ρsurf

0.04 g/cm² at 20 °C

Surface roughness RMS

0.97 μm

DIN 4768


Elongation A

180 % at 20 °C

ASTM D882-80

Elongation, transverse A

180 % at 20 °C

ASTM D882-80

Tensile strength Rm

19 MPa at 20 °C

ASTM D882-80

Tensile strength, transverse Rm,trans

19 MPa at 20 °C

ASTM D882-80


Haze H

35 %

ASTM D1003

Luminous transmittance t

87 [-]

ASTM D1003-77 (Gardner hazemeter)


Coefficient of thermal expansion α

1.9E-5 1/K at 50 °C

Coefficient of thermal expansion, transverse αtrans

1.6E-5 1/K at 50 °C

Melting point Tm

255 - 260 °C

ASTM E794-85

Technological properties


The key features are: High dimensional stability and excellent flatness, superb machinability due to surface roughness characteristics, certified UL746B (105°C), available in both reels and sheets

This material data has been provided by Goodfellow.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.