Polynt Group SMC LS 3681 CL1

Polynt Group 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.

Functions: Molding Compound

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Composite Materials Functions

Features & Benefits

Applications & Uses

Properties

Typical Properties
ValueUnitsTest Method / Conditions
Rockwell Hardness80HRmISO 2039-2
Heat distortion temperature HDTmin. 200°CISO 75
Flexural modulus9.5MPaISO 14125A
Linear Shrinkage0,0%ISO 2577
arc resistancemin. 180sASTM D 495
Ignitability to direct impingement of flamemax. 150mmISO 11925-2
Density1,8g/cm3ISO 1183
Quantity of glass25%ISO 11667
Impact strength (Charpy)70KJ/m2ISO 179
Water absorptionmax. 0,2%ISO 62 Met. 1
Flexural strength150MPaISO 14125A
Reaction to fire1:00 AMClassUNI CEI 11170-3
Tossicity Indexmax. 20ITCNF F 16-101
Smoke indexF1ClassNF F 16-101
Surface resistivity10^14
Volume resistivity10^14

Storage & Handling

Handling and Storage
  • Storage at 15-25°C, in dry ambient and out of direct sun light
  • Molding time 40 s/mm
  • Molding pressure 70 - 110 bar
  • Molding temperature 140 – 160°C