technical guide

chemical & technical properties

Fluoroplastics, known as the noble plastics, are some of the most inert materials known to man.

 

Fluoropolymers are unaffected by all chemicals, and certainly most chemicals in industrial use. The few chemicals that are known to have an effect are:

  • Sodium metal

  • Potassium metal, in liquid form or as reactive complexes which are, in effect, liquid solutions of these metals

  • Fluorine and related oxidising compounds, such as chlorine trifluoride at elevated temperatures

There is no known solvent for PTFE, FEP or PFA. Find the PTFE Chemical Resistance technical data.

Fluoroplastic Technical Properties

 
PTFE 
FEP 
PFA 
ETFE
Tensile strength (kp/cm³) 250 210 280 450
Elongation (%) 350 300 300 200
Flexural modulus (kp/cm²) 6800 6800 1400 1400
Hardness D55 D55 D55 D75
Melting point (°C) +327 +279 +305 +270
Max service temp. (°C) +260 +200 +260 +150
Low service temp. (°C) -200 -200 -200 -200
Non flammability 94 VO 94 VO 94 VO 94 VO
Water absorption 20°C (%)  <0.01 <0.01 <0.01 0.01
Weather resistance Excellent Excellent Excellent Excellent
Density (g/cm³) 2.1 2.1 2.1 1.7
Dielectric constance (MHz) 2.1 2.1 2.1 2.6
Dissipation factor 0.0002 0.0002 0.0002 0.0008
Organic solvent resistance Excellent Excellent Excellent Excellent
Acids & alkalies resistance Excellent Excellent Excellent Excellent
Flexibility Excellent Good Good Good
Radiation resistance (rad) 10-5 10-6 10-6 10-8
Specific heat (cal/g/°C) 0.3 0.28 0.29 N/A
Thermal conduct. (cal.sec.sq cm/°C/cm) 5 x 10-4 5x 10-4 5 x 10-4 N/A
Linear expansion coef. (cm/cm/°C) 10-4 9 x 10-5 14 x 10-5 9 x 10-5
Friction coef. (dynamic to steel) 0.1 0.2 0.2 0.3

 

Plastics Maximum Operating Temperatures

Diagram showing Plastics Maximum Operatin Temperatures

IMPORTANT NOTE: This data is intended as a guide and is taken from resin manufacturers' data. Adtech cannot take responsibility for the accuracy of the data, and customers must evaluate the material under the relevant conditions if the properties are critical to their applications.

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