85N is the ultimate polyimide and laminate prepreg system fo PWB's requiring resistance to high temperature, both in process and in end-use applications. Bromine-free chemistry provides Bestin-Class thermal stability for applications with sustained high in-use temperatures as well as for use in lead-free soldering applications.

Polymer Name: Polyimide (PI)

Functions: Laminate, Prepreg

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Polymer Name
Composite Materials Functions

Features & Benefits

Labeling Claims
Materials Features

Applications & Uses

Properties

Flame Rating
Physical Form
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength (CD)48KpsiIPC TM-650 2.4.18.3
Tensile Strength (MD)64KpsiIPC TM-650 2.4.18.3
Peel Strength to Copper (1 oz/35 micron) After Thermal Stress6.4 (1.1)lb/in (N/mm)IPC TM-650 2.4.8
Peel Strength to Copper (1 oz/35 micron) at Elevated Temperatures6.4 (1.1lb/in (N/mm)IPC TM-650 2.4.8.2
Peel Strength to Copper (1 oz/35 micron) After Process Solutions6.4 (1.1lb/in (N/mm)IPC TM-650 2.4.8
Young's Modulus (CD)3.6MpsiIPC TM-650 2.4.18.3
Young's Modulus (CD/MD)3.6/4.1 (24.8/28.2)Mpsi (GPa)IPC TM-650 2.4.18.3
Young's Modulus (MD)4.1MpsiIPC TM-650 2.4.18.3
Poisson's Ratio0.18-ASTM D-3039
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.6-ASTM D 792
Water Absorption (0.062)0.27%IPC TM-650 2.6.2.1
Thermal Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature (Tg) - TMA250°CIPC TM-650 2.4.24
Coefficient of Thermal Expansion (X,Y)16ppm/°CIPC TM-650 2.4.41
z-axis Expansion (50-260oC)1.2%IPC TM-650 2.4.24
Coefficient of Thermal Expansion (Z) - Below Tg55ppm/°CIPC TM-650 2.4.24
Coefficient of Thermal Expansion (Z) - Above Tg149ppm/°CIPC TM-650 2.4.24
Decomposition Temperature (Td, 5%)407°CIPC TM-650 2.3.41
Decomposition Temperature (Td) - Initial387°CIPC TM-650 2.3.41
T260min. 60minIPC TM-650 2.4.24.1
T288min. 60minIPC TM-650 2.4.24.1
T300min. 60minIPC TM-650 2.4.24.1
Thermal Conductivity0.2W/(m K)DIN 52616
Electrical Properties
ValueUnitsTest Method / Conditions
Electrical Strength1450 (57.1)Volts/mil (kV/mm)IPC TM-650 2.5.6.2
Dielectric Constant (1 MHz)4.2-ASTM D 150
Dielectric Constant (1 GHz)4Multilayer ~ 50% RCIPC TM-650 2.5.5.9
Dissipation Factor (1 MHz)0.01-ASTM D 150
Volume Resistivity (C96/35/90)1.5 x 10^8MΩ-cmIPC TM-650 2.5.17.1
Volume Resistivity (E24/125)3.0 x 10^10MΩ-cmIPC TM-650 2.5.17.1
Surface Resistivity (C96/35/90)1.6 x 10^9IPC TM-650 2.5.17.1
Surface Resistivity (E24/125)1.6 x 10^9IPC TM-650 2.5.17.1
Dielectric Breakdownmin. 40kVIPC TM-650 2.5.6
Arc Resistance143secASTM D495
Flammability
ValueUnitsTest Method / Conditions
FlammabilityHB-UL 94

Regulatory & Compliance