Eccostock™ LoK

Eccostock™ LoK

Light weight dielectric thermoset

Eccostock LOK weighs only about half that of polystyrene and one quarter that of polytetrafluorethylene, making it first choice for weight sensitive application. It has better dimensional stability than other low loss plastics and exhibit very good moisture resistance It will not cold flow, nor will flow when heat is applied. Eccostock Lok is of benefit in application like coaxial, waveguide and antenna support to minimize reflections in transmission line thanks to its low dielectric constant.

Features and Benefits

  • Very low dielectric constant
  • Lightweight
  • Moisture resistant
  • Good dimensional stability


Automated PackagingAutomated Pad PlacementCustom AutomationCustom Product DevelopmentModelingPrototypingServiceTesting


Last Updated: 16/07/2021

Technical Specification

Typical PropertiesColorWhite
Density (g/cc)0.54
Operating Temperature Max (Celsius)150
Operating Temperature Min (Celsius)-70
Shelf LifeMinimum 720 Days from Date of Shipment
TypeLow Loss Dielectric thermoset
Thermal PropertiesThermal Conductivity (W/mK)0.40
Electromagnetic PropertiesLoss Tangent0.00400
Product Frequency Range0.06 - 10 Ghz
Electrical PropertiesDielectric Constant Max1.70
Dielectric Constant Min1.70
Dielectric strength (Kv/mm)11.8
Volume Resistivity10^14 Ohm-cm
Mechanical PropertiesCoefficient of linear expansion (cm/cm/°c)0.00005
DimensionsThickness Max (mm)50.80
Thickness Min (mm)3.18
ComplianceREACH Yes
ROHS CompliantYes
OptionsOption Availability - MachiningYes
Option Availability - on drawingYes


Last Updated: 11/03/2022


Aerospace/DefenseHealthcare / MedicalIndustrialTelecom/Datacom


AntennaBase station/Power amplifier/Acitve antenna unit /small cellInstrumentation/Test and measureMedical diagnosticSatellites