Polynt SMC LS 3681 CL1 Sheet Molding Compound

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Polynt SMC LS 3681 CL1 Sheet Molding Compound
Categories:	Polymer; Thermoset; Polyester, TS
Material Notes:	SMC LS 3681 CL1 is a sheet molding compound based on an unsaturated polyester resin, fire retardant grade, halogen-free, reinforced with glass fibers. This SMC has been developed for railway applications. Good mechanical properties and good fire protection grade are combined into the SMC LS 3681 CL1. SMC LS 3681 CL1 complies with UNI CEI 11170-3 CL1A and electrical applications UNI CEI 11170-3 LR4 . SMC LS 3681 CL1 is formulated according to RoHS, REAC regulation (SVHC) and WEEE European legislation. Information provided by Polynt Composites.
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Physical Properties	Original Value	Comments

Density	1.80 g/cc	ISO 1183
Filler Content	25 %	Glass; ISO 11667
Water Absorption	<= 0.20 %	ISO 62 Met. 1
Linear Mold Shrinkage	0.00 cm/cm	ISO 2577

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	80	ISO 2039-2
Flexural Strength	150 MPa	ISO 14125A
Flexural Modulus	9500 MPa	ISO 14125A
Charpy Impact Unnotched	70.0 kJ/m²	ISO 179

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm	IEC 93
Surface Resistance	1.00e+14 ohm	IEC 93

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	>= 200 °C	ISO 75

Processing Properties	Original Value	Comments
Mold Temperature	140 - 160 °C
Hold Pressure	1015 - 1595 psi	Molding pressure

Descriptive Properties
Molding time	40 s/mm

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PPOLYN9108 / 231703

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