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PVDF KYNAR® and KYNAR FLEX®

Producer: Arkema
Polymer type PVDF

Kynar® PVDF is a fluorinated semi-crystalline thermoplastic which is obtained by polymerising vinylidene fluoride (VF2).

General info

Homopolymer Kynar® PVDF, without any additives, has the intrinsic stability inherent to fluoropolymers, even when exposed to harsh environments. It provides the user with a unique combination of properties leading to longer equipment life.

The most important properties of Kynar® PVDF are:

  • Excellent chemical resistance to most aggressive substances and solvents
  • Excellent mechanical strength and toughness
  • High abrasion resistance
  • High temperature capabilities: continuous use service temperature up to 150°C
  • Excellent ageing resistance
  • High purity
  • Resistance to UV and nuclear radiations
  • Excellent intrinsic fire resistance
  • Low permeability to most gases and liquids
  • Easily melt-processed by standard methods of extrusion and moulding
  • Wide range of rigid and flexible grades available

Besides the PVDF homopolymers, Arkema also produces a large range of VF2- HFP copolymers called Kynar Flex® which stand out for their higher flexibility (the higher the HFP content, the higher the flexibility), a large range of melting point (from 117-166°C).

Properties

Kynar® PVDF and Kynar Flex® properties

Environment Properties

Kynar® grades exhibit outstanding chemical resistance to most acids & halogens and a low permeability to most gases & liquids

Strength and Toughness

KYNAR® and KYNAR FLEX® PVDF fluoropolymers are inherently strong and tough as reflected by their tensile properties and impact strength.

Flexural and Tensile Creep

Compared to many thermoplastics, KYNAR® fluoropolymers have excellent resistance to tensile creep and fatigue so that KYNAR® resins are suitable for many applications in which load bearing characteristics are important.

Thermal Properties

KYNAR® resins exhibit high thermal stability: Prolonged exposure of KYNAR® resin at 250°C does not lead to weight loss. No oxidative or thermal degradation has been detected during continuous exposure of KYNAR® resins to 150°C for a period of ten years.

KYNAR® homopolymer resins are thermally stable up to 375°C when heated in air at the rate of 5°C/min.

Datasheets

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