Ethylene Vinyl Alcohol Copolymer (EVOH) as a Functional Barrier against Surrogate Components Migrating from Paperboard

Ethylene vinyl alcohol copolymer (EVOH) is a key material of interest as a functional barrier against substances migrating from recycled paperboard, due to its outstanding barrier properties. Three multilayer films containing two different grades of EVOH, L171B (3 µm) and F171B (3 and 5 µm), were be...

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Bibliographic Details
Published in:Journal of chemistry 2019, Vol.2019 (2019), p.1-7
Main Authors: Buntinx, Mieke, Carleer, Robert, Peeters, Roos, Herremans, Geert, Luyten, Wout, Teniers, Cynthia, Yuki Junior, Giberto Mitsuyoshi, Maes, Caroline, Samyn, Pieter
Format: Article
Language:English
Subjects:
Accelerated tests
Alcohol
Anthracene
Barriers
Copolymers
Efficiency
Ethylene
Food contamination & poisoning
Food packaging
Hydrocarbons
Indoor air quality
Mineral oils
Multilayers
Paper board
Paperboard
Polyamide resins
Polyethylene terephthalate
Polymers
Protective coatings
Recycled materials
Science
Shelf life
Weight
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Summary:Ethylene vinyl alcohol copolymer (EVOH) is a key material of interest as a functional barrier against substances migrating from recycled paperboard, due to its outstanding barrier properties. Three multilayer films containing two different grades of EVOH, L171B (3 µm) and F171B (3 and 5 µm), were benchmarked against a multilayer film containing polyamide 6/6.6 copolymer (PA 6/6.6, 3 µm) and monolayer polyethylene terephthalate (PET, 12 µm). The 5 films were evaluated as barrier materials against 5 surrogate substances simulating different migrants potentially present in recycled paperboard: n-heptadecane (C17) as a mineral oil-saturated hydrocarbon (MOSH), 4-methylbenzophenone (MBP) as a photoinitiator, di-n-propyl phthalate (DPP) as a plasticiser, and anthracene (ANT) and perylene (PER) as mineral oil aromatic hydrocarbons (MOAHs). The test was accelerated at 60°C for 25 days, which is equivalent to a shelf life of 2 years at 25°C. All films containing 3 or 5 µm EVOH were found to be good barriers, showing no breakthrough values over 1% of the initial concentration found in the paperboard, and they could easily compete with 12 µm PET. The multilayer with 3 µm PA 6/6.6 showed higher breakthrough values for both MBP and DPP than the other materials although still below the 1% threshold value. However, ANT showed substantial breakthrough values of nearly 2%, indicating that PA 6/6.6 might not offer enough protection against low-weight MOAH components.
ISSN:2090-9063
2090-9071
DOI:10.1155/2019/4180708