Highlights
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The migration of carvacrol and thymol from PP films into food simulants was studied.
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The release of carvacrol and thymol from PP films showed a Fick's behaviour.
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The antioxidant activity of migration extracts was confirmed by the DPPH method.
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Thymol showed higher migration and antioxidant activity into fatty food simulants.
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Carvacrol and thymol show a potential use as antioxidants for active packaging.