Naslov
Oxygen permeability of high barrier food packaging film after ultrasound treatment

Autori
Ščetar, Mario ; Režek Jambrak, Anet ; Galić, Kata ; Lelas, Vesna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings MATBIM2012 / Debeaufort, Frédéric - Dijon, 2012

Skup
2nd International symposium International Meeting on packaging Material / Bioproduct Interactions

Mjesto i datum
Dijon, Francuska, 22.04.2012. - 25.04.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ultrasound; polypropylene; oxygen permeability

Sažetak
Ultrasonic waves can be readily propagated through certain optically opaque materials including many foods and packaging materials. For food products expected to exhibit extended shelf-life, a loss of packaging integrity may be a precursor to major food safety and quality issues. Coated (acrylic/ polyvinylidene chloride) biaxially oriented transparent polypropylene (BOPP/Ac/PVDC) films was treated for 2, 4 and 6 minutes with power ultrasound, high intensity and low frequency, 20 kHz probe with constant amplitude of 50%, 75% and 100% (S-4000, Misonix Sonicators, Newtown, Connecticut, SAD). The oxygen permeability, using a Brugger (GDP-C model) permeability tester, of the BOPP/Ac/PVDC was analysed at 20/40/60 °C. The permeability (P), the diffusion (D) and the solubility (S) constants of the oxygen in BOPP/Ac/PVDC film was determined before and after ultrasound treatments. Ultrasound treatment (6 min., 50% amplitude) increased oxygen permeability of BOPP/Ac/PVDC film from 3.8 cm3/m2.d. bar (non- treated sample) to 57 cm3 /m2.d. bar, at 20°C. BOPP/Ac/PVDC film, treated at 2 min. with 100% amplitude, showed increased oxygen permeability from 290 to 330 cm3/ m2.d. bar at 60°C. The present work has clearly illustrated that the structure of the BOPP/Ac/PVDC film was damaged leading to the gas barrier degradation of coated polypropylene film.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA