Thermal & Cryogenic Resistance: HPP for Extreme Temperatures

Thermal & Cryogenic Resistance: HPP for Extreme Temperatures

Extreme thermal performance: a speciality of HPP polymers

In fields such as aerospace, automotive and electronics, extreme temperatures are the norm. Conventional plastics fail. High-performance polymers (HPPs) provide exceptional thermal resistance over an operating range from -200°C to +550°C, while retaining their mechanical properties.

High-temperature challenges: beyond conventional plastics

  • Loss of rigidity from 100-120°C for standard plastics
  • Deformation, creep, embrittlement under prolonged heat
  • Alteration of tolerances and wear resistance

High-temperature plastics (HPP) retain their structure above 250°C in continuous service, some up to 320-550°C.
 

Cryogenic stress: strength at very low temperatures

  • Risk of breakage, cracking, excessive contraction
  • Loss of elasticity and propagation of internal stresses

But some HPPs, such as Torlon® or Vespel®, operate safely down to -273°C, while remaining structural and functional.
 

DEMGY range: HPP for extreme temperatures

Product

 

Min. temp. (°C)

 

Continuous temp. (°C)

 

Max. temp. (°C)

 

Application

 

Vespel® SCP-5000

 

-273

 

320

 

550

 

Space, engine, cryogenics

 

Torlon® 4203

 

-196

 

260

 

280

 

Mechanical, chemical

 

KetaSpire® KT-820 CF30

 

-60

 

260

 

315

 

Automotive, aerospace

 

Ryton® R4

 

-70

 

220

 

280

 

Electronics, fluids

 

Teflon® FEP-9302

 

-200

 

200

 

280

 

Insulation, wiring

 

Kynar® 1000 HD

 

-40

 

140

 

200

 

Coatings, pharma

 
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HPP vs. Metals & Plastics: the comparison

Criteria

 

Metals

 

Standard plastics

 

HPP

 

Heat resistance

 

High

 

Low

 

Excellent ✅

 

Chemical resistance

 

Medium

 

Low

 

Very good ✅

 

Density / weight

 

High

 

Low

 

Low ✅

 

Heat distortion

 

Yes

 

Yes

 

Low ✅

 

Electrical insulation

 

No

 

Yes

 

Yes ✅

 
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Fields of application

Aerospace & defense

  • Heat shields, engines, light armor
  • Vespel® SCP-5000: +550°C stability

Automotive & electric mobility

  • Motors, sensors, battery insulation
  • KT-820 CF30 : lightweight and rigid at +315°C

Mechanical industry

  • High-load bearings and bushings
  • Torlon® 4203 : mechanical holding under temperature

Power electronics

  • Heat dissipation, connectors
  • Ryton® R4 and Teflon® FEP: dielectrics + temperature
     

DEMGY expertise in thermal resistance

Technical support

  • Thermal cycle analysis
  • Polymer selection according to application, pressure, environment

High-temperature processing

  • Reinforced HPP injection molding, machining and compression
  • Post-process heat treatments

Full validation

  • Ageing tests, creep measurement, deformation under load
  • UL, ISO, REACH-compliant material files
     

Heat-resistant HPP polymers are a reliable alternative to metallic materials in extreme environments. They guarantee stability, safety and lightness, while ensuring constant properties from -200 to +550°C.