High‐speed plasma treatment of polyethylene terephthalate films using ultrasound assisted dielectric barrier discharge

Cheng Fang, Yukihiro Kusano*, Alexander Bardenshtein

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Polyethylene‐terephthalate (PET) films were treated using an air‐to‐air type atmospheric pressure dielectric barrier discharge (DBD) plasma in helium with ultrasonic irradiation, particularly for aiming at improving wettability. Airborne ultrasound was irradiated to the plasma using a pneumo‐acoustic stem‐jet Hartmann's generator. The wettability was significantly improved even when the treatment speed was up to 300 mm/s, corresponding to an estimated exposure time of approximately 30 ms. It is at least a factor of 30 shorter than the time required to achieve the same level of plasma treatment effect without ultrasonic irradiation. This effect opens an opportunity for industrial implementation of high‐speed plasma treatment of PET flexible packaging films by a straightforward embedding of pneumatic generators of ultrasound into existing wide‐web roll‐to‐roll commercial machines based on DBD.
Original languageEnglish
JournalPackaging Technology and Science
Number of pages7
ISSN0894-3214
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Atmospheric pressure plasma
  • Dielectric barrier discharge
  • Polyethylene-terepthalate
  • Surface modification
  • Ultrasound

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