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PVDF plastic machined parts

PVDF (polyvinylidene fluoride) is a high-performance fluoropolymer with excellent chemical resistance and very good machinability. This guide covers attributes, applications, design notes, finishing options, and UK stock sizes.

Great chemical resistance
Higher tensile & compressive strength than PTFE

PVDF plastic machined parts

PVDF (polyvinylidene fluoride) is a high-performance fluoropolymer with excellent chemical resistance and very good machinability. This guide covers attributes, applications, design notes, finishing options, and UK stock sizes.

Great chemical resistance
Higher tensile & compressive strength than PTFE

PVDF plastic machined parts

PVDF (polyvinylidene fluoride) is a high-performance fluoropolymer with excellent chemical resistance and very good machinability. This guide covers attributes, applications, design notes, finishing options, and UK stock sizes.

Great chemical resistance
Higher tensile & compressive strength than PTFE

PVDF plastic grades we use

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What is PVDF plastic?

PVDF (polyvinylidene fluoride) is a high performance engineering plastic. It is a relatively new fluoropolymer best regarded for its chemical resistance. Although similar to PTFE, the mechanical features such as tensile stress and compressive strength are notably higher. Where PTFE trumps PVDF is in resistance to high temperatures (up to 300°C as opposed to 150°C for PVDF).

PVDF has very good machinability and therefore there are few restrictions to consider when machining.

Sharp cutting tools are recommended to avoid chipping during machining.

You may also see PVDF referred to as:

  • TECAFLON™
  • Symalit®
  • Kynar®

Main attributes

  • Outstanding chemical resistance to acids and alkali
  • High density
  • Mechanical strength and toughness
  • Very low moisture absorption
  • Good UV and weather resistance
  • Flame retardant
  • Very good weldability
  • Food compliant
  • Wide operating temperature range (-50°C to 150°C)
  • Excellent dimensional stability
  • Good electrical insulating properties
  • Low thermal conductivity

Note for designers

PVDF is an expensive thermoplastic and therefore should be reserved for applications requiring the highest strength, purity and chemical and heat resistance.

If the superior tensile stress and compressive strength are not required, or a higher operating temperature is desired, PTFE may be considered as an alternative.

UK stock sizes

Here are some indicative stock sizes/colours for PVDF in the UK. Please note we do not supply stock material, the information provided is purely for design and research purposes.

Examples PVDF Stock Sizes

Stock sizes will vary depending on supplier. Please get in contact to discuss further.

PVDF is typically available in rod, tube and plate form in lengths of 1000mm and 3000mm.

PVDF Rod
  • From 4 to 16mm
  • Natural / Black modificated (electrical conductive)
PVDF Plate
  • 10x500mm to 20x1000mm
  • Natural / Black modificated (electrical conductive)
PVDF Tube
  • 040 / 0025mm to 090 / 0070mm
  • Natural

Please note: some sizes may be non-stocked items and subject to minimum order quantities.

Common Applications

  • Chemical processing & storage equipment
  • Laboratory equipment
  • Solar power systems
  • Valves & pumps
  • Food processing machinery & equipment
  • Bearings & bushings

Technical properties

Here are the properties for TECAFLON PVDF natural which is an unfilled, unreinforced PVDF brand. Reinforced and modified grades will have different properties.

TECAFLON PVDF Properties

Mechanical properties

Mechanical Properties

 Value Parameter Norm Notes
Modulus of Elasticity (tensile test) 2200 MPa 1mm/min DIN EN ISO 527-2 For tensile test: specimen
type 1b
Tensile Strength  62 MPa 50mm/min DIN EN ISO 527-2  
Tensile Strength at Yield 62 MPa 50mm/min DIN EN ISO 527-2  
Elongation at Yield 8% 50mm/min DIN EN ISO 527-2  
Elongation at Break 17% 50mm/min DIN EN ISO 527-2  
Flexural Strength 77 MPa 2mm/min, 10 N DIN EN ISO 178 For flexural test: support span 64mm, norm specimen
Modulus of Elasticity (flexural test) 2100 MPa 2mm/min, 10 N DIN EN ISO 178  
Compression Strength 16/28/59 MPa 1% / 2% / 5% 5mm/min, 10 N EN ISO 604 Specimen 10x10x10mm
Compression Modulus 1900 MPa 5mm/min, 10 N EN ISO 604 Specimen 10x10x50mm
Impact Strength (Charpy) 150 kJ/m2 max. 7.5J DIN EN ISO 179-1eU For Charpy test: support span 64mm, norm specimen
Ball Indentation Hardness 129 MPa   ISO 2039-1 Specimen in 4mm thickness
Thermal properties

Thermal Properties

 Value Parameter Norm Notes
Glass Transition Temperature -40°C   DIN EN ISO 11357 Found in public sources
Melting Temperature 171°C   DIN EN ISO 11357  
Service Temperature 150°C short term   Found in public sources. Individual testing regarding application conditions is mandatory
Service Temperature 150°C long term    
Thermal Expansion (CLTE) 16 10-5 K-1 23-60°C, long DIN EN ISO 11359-1;2  
Thermal Expansion (CLTE) 18 10-5 K-1 23-100°C, long DIN EN ISO 11359-1;2  
Electrical properties

Electrical Properties

 Value Norm
Specific Surface Resistance 1014 Ω DIN IEC 60093
Other properties

Other Properties

 Value Parameter Norm Notes
Water Absorption <0.01 / <0.01% 24h / 96h (23°C) DIN EN ISO 62 Ø ca. 50mm, h=13mm
Resistance to hot water/bases +   - + good resistance
Resistance to weathering +   -  
Flammability (UL94) V0 Corresponding to DIN IEC 60695-11-10 Corresponding means no listing at UL (yellow card). The information might be taken from resin, stock shape or estimation. Individual testing regarding application conditions is mandatory.
Density 1.78 g/cm3      

Industries that use PVDF plastic

PVDF plastic FAQs

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