Antimicrobial and Barrier Properties of LDPE Films Containing Imazalil and EDTA

Imazalil and ethylenediamine-tetraacetic acid (EDTA) were incorporated into low-density polyethylene (LDPE) aimed at producing antimicrobial packaging films for foodstuffs. Moulded plates (thickness 2mm) containing 5% of EDTA inhibited Bacillus subtilis, whereas 0.05–0.25% of imazalil had strong act...

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Veröffentlicht in:Journal of plastic film & sheeting 2003-10, Vol.19 (4), p.249-261
Hauptverfasser: Vartiainen, Jari, Skytta, Eija, Ahvenainen-Rantala, Raija, Enqvist, Jouni
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container_end_page 261
container_issue 4
container_start_page 249
container_title Journal of plastic film & sheeting
container_volume 19
creator Vartiainen, Jari
Skytta, Eija
Ahvenainen-Rantala, Raija
Enqvist, Jouni
description Imazalil and ethylenediamine-tetraacetic acid (EDTA) were incorporated into low-density polyethylene (LDPE) aimed at producing antimicrobial packaging films for foodstuffs. Moulded plates (thickness 2mm) containing 5% of EDTA inhibited Bacillus subtilis, whereas 0.05–0.25% of imazalil had strong activity against Aspergillus niger. Further tests for antimicrobial activity, migration and oxygen and water vapor barrier properties were carried out using biaxially stretched LDPE films containing different combinations of both substances. The addition of imazalil and EDTA increased the oxygen transmission rates and water vapor permeabilities, although the effects with imazalil films were not as significant. Transparency of the EDTA containing films decreased rapidly as a function of added EDTA, whereas imazalil films were optically faultless. Total migration into 3% acetic acid and 10% ethanol was below 4 mg/dm2. Although imazalil retained its activity against A. niger on a high level (inhibition zones >30 mm), the activity of EDTA was gone. None of the samples inhibited Escherichia coli.
doi_str_mv 10.1177/8756087903042808
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subjects Applied sciences
Aspergillus niger
Bacillus subtilis
Escherichia coli
Exact sciences and technology
Forms of application and semi-finished materials
Polymer industry, paints, wood
Sheets and films
Technology of polymers
title Antimicrobial and Barrier Properties of LDPE Films Containing Imazalil and EDTA
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