JNC PI-6643-004 | Insulating Polyimide Ink

Main features
  • Thermal Curable
  • High Heat Resistance
  • Inkjet Printing

Product Description

PI-6643-004 is a high-heat insulating polyimide ink specially designed to meet the demands of high thermal applications, which provide solutions for heat resistance and insulation applications. 

PI-6643-004 is engineered to be a thermally curable polyimide ink with remarkable insulating properties making it an ideal choice for electrical isolation and heat management applications. Its polyimide-based chemistry brings forth the balance between flexibility and resilience. With a high Tg of 395°C, this enabled high resistance features that can withstand extreme heat conditions. Moreover, this ink has a mere 2% water absorbance, making it impervious to moisture-induced vulnerabilities. Its reliability remains intact even in environments with varying humidity levels.

This ink can also be utilised as a Removable, structural material, as long as it is cured at a temperature of ±100°C. If you fully cure it, to get its insulating ink properties, then it is not solubable, etchable or generally removable anymore.

Industry Applications:

Aerospace Engineering | Electronics Manufacturing | High Temperature Sensors | Industrial Furnace Components

Cure condition

  • 350⁰C in 30 min
Product Family
1 kg

Catalog Product

Unlike other products we offer, the products listed on this page cannot currently be ordered directly from the website.

Technical Specifications

General Properties
Process Method Inkjet
Solids 25 %
Physical Properties
Viscosity is a measurement of a fluid’s resistance to flow.

Viscosity is commonly measured in centiPoise (cP). One cP is defined as
the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP.

A product like honey would have a much higher viscosity -around 10,000 cPs-
compared to water. As a result, honey would flow much slower out of a tipped glass than
water would.

The viscosity of a material can be decreased with an increase in temperature in
order to better suit an application
12 mPa.s
Chemical Properties
Water Absorption 2.0 %
Electrical Properties
Breakdown Voltage
Breakdown Voltage
Breakdown voltage is the minimum voltage necessary to force an insulator to conduct some amount of electricity.
It is the point at which a material ceases to be an insulator and becomes a resistor that  conducts electricity at some proportion of the total current. 

After dielectric breakdown, the material may or may not behave as an insulator any more because of the molecular structure alteration. The current flow tend to create a localised puncture that totally alters the dielectric properties of the material.

This electrical property is thickness dependent and is the maximum amount of voltage that a dielectric material can withstand before breaking down. The breakdown voltage is calculated by multiplying the dielectric strength of the material times the thickness of the film.
150 V
Volume Resistivity
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
1.0x1016 Ohms⋅cm
Mechanical Properties
Elongation is the process of lengthening something.

It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks.

It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
3 %
Thermal Properties
Coefficient of Thermal Expansion (CTE)
Coefficient of Thermal Expansion (CTE)
CTE (Coefficient of thermal expansion) is a material property that is indicative of the extent to which a material expands with a change in temperature. This can be a change in length, area or volume, depending on the material.

Knowing the CTE of the layers is helpful in analyzing stresses that might occur when a
system consists of an adhesive plus some other solid component.
Coefficient of Thermal Expansion (CTE), α1
Coefficient of Thermal Expansion (CTE), α1
CTE α1 (alpha 1) is the slope of the Coefficient of thermal expansion in a temperature range below the Glass transition temperature (Tg).

It explains how much a material will expand until it reaches Tg.
60 ppm/°C
Glass Transition Temperature (Tg)
Glass Transition Temperature (Tg)
The glass transition temperature for organic adhesives is a temperature region where the polymers change from glassy and brittle to soft and rubbery. Increasing the temperature further continues the softening process as the viscosity drops too. Temperatures between the glass transition temperature and below the decomposition point of the adhesive are the best region for bonding.

The glass-transition temperature Tg of a material characterizes the range of temperatures over which this glass transition occurs.
395 °C

Additional Information

Properties PI-6643-004
Solids content (wt. %) 25
Viscosity (mPa's) @25℃ 12
Surface tension (mN/m) @23℃ 30
Printing methods Inkjet
Curing 350℃
Post-curing -
Volume resistivity (Ω*cm) 1E+16
Breakdown voltage (V/um) 150
Dielectric constant (1kHz) @1V 3.2
Tensile modulus (MPa) 1530
Elongation (%) 3
Residual stress (MPa) 57
5% weight loss temp (℃) 435
CTE ( 60
Tg (℃) 395
Water absorbance (%) @23℃ 2.0