Rynite® GW525CS1 BK527

Alternative and trade names
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Rynite® GW525CS1BK527 is a 25% Glass Reinforced, Flame Retardant, Polyethylene Terephthalate with Improved Glow Wire Performance

This material data has been provided by Matmatch.

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.

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23.0 °C

1.65 g/cm³

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ISO 1183



Elastic modulus

23.0 °C

11 GPa

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ISO 527-1/-2


23.0 °C

2 %

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ISO 527-1/-2

Impact strength, Charpy notched

23.0 °C

10 kJ/m²

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ISO 179/1eA

Impact strength, Charpy unnotched

23.0 °C

40 kJ/m²

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ISO 179/1eU

Poisson's ratio

23.0 °C

0.34 [-]

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Tensile strength

23.0 °C

155 MPa

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ISO 527-1/-2



Heat deflection temperature, 1.80 MPa

230 °C

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ISO 75-1/-2

Melting point

250 °C

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ISO 11357-1/-3 | 18°F/min

Relative temperature index, electrical

140 °C

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UL 746B | 120mil

Relative temperature index, mechanical strength

140 °C

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UL 746B | 120mil


Burning Behav. at thickness h: V-2 class, Thickness tested: 0.8 mm, UL recognition: yes -, FMVSS Class: B -, Burning rate, Thickness 1 mm: <80 mm/min



Comparative tracking index

23.0 °C

200 V

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IEC 60112

Rheological Properties


Melt viscosity

280.0 °C

205 Pa·s

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ISO 11443 | @ 1000 sec-1, 280°C


23.0 °C

0.2 %

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ISO 294-4, 2577

Shrinkage, transverse

23.0 °C

0.8 %

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ISO 294-4, 2577

Technological properties


25% Glass Fiber

Processing methods

Drying Recommended: yes, Drying Temperature: 120°C, Drying Time, Dehumidified Dryer: 4-6h, Processing Moisture Content: ≤0.02%, Melt Temperature Optimum: 280°C, Min. melt temperature: 270°C, Max. melt temperature: 290°C, Max. screw tangential speed: 0.2m/s, Mold Temperature Optimum: 140°C, Min. mold temperature: 120°C, Max. mold temperature: 140°C, Hold pressure range: ≥80MPa, Hold pressure time: 4s/mm, Back pressure: As low as possible, Ejection temperature: 170°C