Chemical resistance: HPP for aggressive environments

Chemical resistance: HPP for aggressive environments

Chemical Resistance, a Structuring Asset for HPPs

Environments where aggressive fluids - acids, alkalis, solvents, hydrocarbons - circulate require durable, inert and stable materials, even at high temperatures. Unlike standard plastics, HPP resists the most corrosive chemical attacks, without swelling, cracking or loss of properties.

Which chemical agents? Which risks?

Unsuitable materials can suffer from :

  • Swelling or stress cracking
  • Fragilization by solvents or oxidation
  • Substance migration or fluid contamination
  • Pressure/temperature failure

HPPs avoid these phenomena thanks to their stable molecular structure.
 

HPP polymers with high chemical resistance - Sélection DEMGY

Product

 

Resistant agents

 

Continuous temperature

 

Key benefits

 

PTFE (Teflon® FEP 9302)

 

Strong acids, solvents, bases

 

200°C

 

Total inertia, self-lubricating

 

PVDF (Kynar® 1000 HD)

 

Acids, bases, aqueous solutions

 

140°C

 

Excellent wet strength

 

PFA / MFA

 

All media + high T°

 

260°C

 

PTFE equivalent but thermotransformable

 

PEEK (KT820, Victrex®)

 

Oxidizing agents, steam, hydrocarbons

 

250°C

 

Chemical inertness + mechanical stability

 

PPS (Ryton® R4)

 

Hydrocarbons, bases, weak acids

 

220°C

 

Dimensional + chemical stability

 
Press Enter to type after or Shift + Enter to type before the widget.

Critical application areas

Chemical industry

  • Pumps, valves, sensor bodies
  • PTFE & PFA: 100% inert, no leaching

Pharmaceutical & food

  • CIP/SIP systems, membranes, piping
  • PVDF & PEEK: resistant + FDA/USP-certifiable

Power & batteries

  • Cooling circuits, sealed enclosures
  • Ryton® R4: the right compromise between rigidity and chemistry

Semiconductors & microfluidics

  • Chemical tanks, ultrapure parts
  • PFA : resistance + extreme cleanliness

Semiconductors & microfluidics

  • Chemical tanks, ultrapure parts
  • PFA: resistance + extreme cleanliness
     

DEMGY: your chemical-resistant HPP expert

Material selection

  • Analysis of your fluid + temperature + pressure
  • Choice of polymer according to pKa, polarity, compatibility

Controlled processing

  • Machining, injection, compression of filled or purified materials
  • Additive manufacturing for sealed prototypes

Traceability & compliance

  • FDA, USP Class VI, ISO 10993 certifications
  • Chemical resistance validated by immersion test, spectroscopy
     

Conclusion

Chemically resistant HPP polymers are essential for designing reliable components in aggressive environments. Thanks to their inertness, durability and purity, they are a durable alternative to standard metals or plastics.