Polyimides Plastic
Sintered and Direct Formed Plastics
MichaelDirect Forming
PI material, (chemically known as Polyimides) is a non-melting high temperature polymer. In addition to the sintering process used to produce stock shapes, finished components can be cost-effectively produced in larger quantities using the direct forming process.  

PI plastics are used everywhere where very high or cryogenic temperature resistance is required. Even above 260°C, dimensional stability, strength and creep resistance remain high. For wear and friction applications Polyimides are the ideal material due to the ability to work under unlubricated conditions, low wear rates and high pV-rates. Thus lifetimes are extended and maintenance costs reduced. 

Polyimide applications can therefore be found in a wide range of industries.For aerospace and semicon industry the high purity and low outgassing are additional benefits of Polyimide plastics.

Polyimides have exceptional properties for high performance applications

  • Long-term thermal stability 300°C (short-term up to 400 °C)
  • High heat resistance up to 470 °C (HDT/A)
  • Good cryogenic properties down to -270 °C
  • High strength, modulus and stiffness also at high temperatures over 260 °C
  • Excellent wear resistance under high surface pressure and high sliding speeds
  • Excellent thermal and electrical insulation
  • Minimal thermal conductivity
  • High purity, low outgassing in vacuum conditions in accordance with ESA regulation ECSS-Q-70-02
  • Good machinability
  • Good chemical resistance to acids, fats and solvents
  • Inherently flame retardant  (UL 94 V0)

TECASINT Product Families

The materials belonging to the polyimide group are characterised by an unusually complex property profile with a large number of excellent individual characteristics and so take up a position at the tip of the material pyramid.

Ensinger offers rods, plastes and tubes as well as customized direct formed parts. Polyimides (PI) are produced by polycondensation.

They are non melting due to the high amount of ring-shaped, mostly aromatic chain links and high molecular weights.  The manufacturing of semi-finished products or direct-forming parts is therefore done exclusively by sintering techniques.


  • Very high modulus
  • High rigidity and hardness
  • Previous designation "SINTIMID"


  • Very high modulus
  • High rigidity
  • High hardness
  • Significantly reduced moisture absorption compared to TECASINT 1000
  • Higher toughness and improved machining capability
  • Ideally suited for direct forming components


  • Minimal water absorption
  • Highest stability against oxidation in air
  • Low friction and wear
  • Optimum chemical resistance
  • HDT /A up to 470 °C
  • Different types available with high elongation at break and toughness our with high flexural modulus


  • High-temperature polyamidimide (PAI)
  • Extremely good dimensional stability
  • Load capacity up to 300 °C


  • Matrix of PTFE reinforced with PI powder
  • Reduced creep under load
  • Excellent sliding and friction properties
  • Ideally suited for soft sliding partners (stainless steel, aluminium, brass, bronze)
  • Best chemical resistance
  • Easy machining properties

Core industries for the use of Polyimides

Fields of applications

  • Tribological applications: Bearing parts, bushings, washers, piston rings and guiding elements
  • Hot glass handling parts for the glass industry
  • Space and aircraft applications
  • Semiconductor production equipment like IC testsockets
  • Radiation and chemical resistant sealings for valves
  • Vacuum equipment parts
  • Cryogenic parts down to -270°C

Application examples

Sensor housing made of TECASINT 5011 (PAI)

  • Thermal resistance up to 300°C
  • Very good electrical insulation

Bottle gripper made from high-temperature polyimide

Polyimides from the TECASINT product family are increasingly used for bottle grippers and transportation discs.  

  • Cost savings due to 3-4 times greater durability as compared with conventional materials (such as CFC)
  • Excellent war resistance
  • Significant reduction of microcracks
  • Low thermal conductivity, good impact resistance and high modulus of elasticity 

Test socket made of TECASINT 4011 (PI)

  • Low outgassing 
  • No condensable impurities
  • High dimensional stability
  • Thermal resistance up to 300°C
  • High strength
  • Good electrical insulation.

High quality Rods, Plates and Tubes in various dimensions

Ensinger offers TECASINT polyimide stock shapes as pressed round rods, plates, short pipes and discs in a wide range of dimensions.

We keep a permanent stock of popularly used TECASINT materials, modifications and dimensions. We also manufacture dimensions specifically to customer requirements.  

Shapes on stock

  • Round rods from Ø 6 - 50 mm
    (length up to 1.000 mm)
  • Plate thickness from 6 - 50 mm
    (length up to  300 x 1.000 mm)
  • Short tubes

Shapes on request

Other diameters on request. Maximum thickness up to 100 mm, maximum rod diameter up to 100 mm (type dependant).

Direct formed Polyimide parts for high volume precision parts

Direct forming is a cost effective manufacturing method for producing high volume precision parts. Direct formed Polyimide parts are typically used for applications in the automotive industry or for large quantity production, when machining shapes is too expensive. Fast running presses (mechanical or hydraulic) compact the powder in the mould cavity. The mouldings are then sintered for some hours at high tem­per­a­tures with the exclu­sion of oxygen. The direct forming technique in­volves practically no material waste. In most cases, reworking is also not required.

TECASINT: Semifinished shapes and direct formed parts

Parts and shapes made of TECASINT have excellent long term stability.

TECASINT 4000 High-performance for exceptional applications

TECASINT 4000 is characterized by its minimal water absorption and maximum oxidative stability, as well as low friction values and optimum chemical resistance.


TECASINT 1000 is an amorphous high-temperature polyimide. Parts made of it excel with very good dimensional stability. They bear a very high load under temperatures which are unreachable for other plastics.

TECASINT: Non-melting high-temperature polyimides for the glass industry

High temperature resistance and low thermal conductivity of polyimides offer great benefits when handling hot glass.


TECASINT 2000 has an outstanding thermal long term durability and a high creep resistance under mechanical load.


TEACSINT 5000 is an amorphous high-temperature-Polyimide. Excellent dimensional stability and good wear resistance offer benefits for a broad range of applications.