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Bayblend® FR421 MT

Technical Datasheet | Supplied by Covestro

Bayblend® FR421 MT by Covestro is a flame-retardant, rubber modified polycarbonate blend filled with mineral. Exhibits an excellent balance of properties such as rigidity, high dimensional accuracy & stability, excellent creep resistance, low moisture absorption and high heat resistance. Possesses good paintability, flowability and offers very good UL recognition in small wall thickness. Provides low emissions and offers high stiffness, easy processing & high toughness – even at cold temperatures. Processed by extrusion. Bayblend® FR421 MT is recommended for aircraft interiors application..

Bayblend® FR421 MT Properties

Physical Properties

Value & Unit

Test Condition

Test Method

Linear Mold Shrinkage, Flow

0.5 - 0.7 %

(150x105x3 mm; 260 °C / MT 80 °C)

b.o. ISO 2577

Water Absorption

0.5 %

(At 23°C, Saturation)

ISO 62

Melt Volume Flow Rate (MVR)

2 cm³/10 min

(At 240°C; 5 kg)

ISO 1133

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