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High Dielectric Constant Polymer Film

Polymer film made with PVDF homopolymer, PVDF-HFP, PVDF-CTFE, PTFE-HFP-VDF, PVDF-TrFE-CTFE, PVDF-TrFE-CFE. They have high dielectric constant from 10 to >50 (pure polymer without any fillers) and high dielectric breakdown strength (500-800 MV/m). They can be used in high energy density film capacitors, actuators, and other applications. They can also be used in soft robotics.

Most of the film are uniaxially or biaxially oriented with high dielectric breakdown strength and uniform thickness. They are sold either in 200 mm x 250 mm paper size for R&D or in small rolls >100 m.

The PVDF film can be either in alpha phase or in beta phase (no poling).


Ultrathin Film with high dielectric constant: Energy Storage Capacitors, Piezo Sensors, Transducers, Soft Actuators, Electrocaloric Cooling, Hydrophone, etc.


Global Leader in Piezo & Pyro PVDF & PVDF-TrFE Technologies


  1. “Relaxor Ferroelectric Polymer Exhibits Ultrahigh Electromechanical Coupling at Low Electric Field”, Science, Accepted, Feb 08, 2022
  2. “High-entropy polymer produces a giant electrocaloric effect at low fields”, Nature, 600, pages 664–669 (2021)
  3. “Flexible high-temperature dielectric materials from polymer nanocomposites”, Nature, 523: 576-579, (2015”
  4. “Techniques for capacitor dielectrics characterization”, Chapter 2 in “Advanced Dielectric Materials for Electrostatic Capacitors”, edited by Qi Li, The Institute of Engineering and Technology IET, 2020.
  5. “Polymer-Based Dielectrics with High Energy Storage Density”, Annual Review of Materials Research, Vol. 45: 433-458, 2015
  6. “Normal ferroelectric to ferroelectric relaxor conversion in fluorinated polymers and the relaxor dynamics”, J. of Material Science, 2006, 41, 271
  7. Patent: Terpolymer and Films Prepared Therefrom, France No. FR2999187B1, December 11, 2012
Film that PolyK have in stock (in rolls):
1. Biaxially oriented PVDF film: 8 um, 12 um, 17 um, 23 um thick (K around 12)
2. Uniaxially Oriented PVDF film: 7 um, 12 um, 18 um and up to 120 um thick (K~12)
3. Piezo PVDF film: 7 um and above (K ~13)
4. Biaxially oriented PVDF-HFP film: 2 um, 3 um, 4 um, 5 um, 6 um, 10 um (K ~10)
5. PVDF-TrFE copolymer film: solvent cast down to 3 um (on carrier film). Uniaxially oriented: 8 um thick (K ~8)
6. PVDF-TrFE-CTFE /-CFE film: uniaxially oriented 3 um. On carrier film 3 um thick. Up to 30 um thick. (K = 20-50)