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Development of Protein‐Based High‐Oxygen Barrier Films Using an Industrial Manufacturing Facility
Author(s) -
Chang Yoonjee,
Joo Eunmi,
Song Honggeon,
Choi Inyoung,
Yoon Chan Suk,
Choi Young Ju,
Han Jaejoon
Publication year - 2019
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.14427
Subject(s) - materials science , composite material , polypropylene , polyethylene terephthalate , ultimate tensile strength , coating , polymer , polyethylene , nylon 6 , low density polyethylene , chemical engineering , engineering
In this study, protein‐based high‐oxygen barrier multilayer films were manufactured at a pilot plant scale by a roll‐to‐roll coating process and an adhesive lamination process. Also, their characteristics were examined to evaluate their industrial feasibility. Oxygen transmission rates (OTRs) of the protein‐based films (polyethylene terephthalate [PET]/pea protein isolate [PPI]/nylon/cast polypropylene [CPP], PET/whey protein isolate [WPI]/CPP, PET/WPI/nylon/CPP, and PET/PPI/nylon/low‐density polyethylene [LDPE]) were significantly lower than OTR of the PET/nylon/CPP film without a protein‐coating layer and that of the commercial high‐barrier multilayer film copolymer (PET/aluminum/CPP). In addition, water vapor transmission rates of the films containing protein layer were significantly lower than that of the commercial high‐barrier film containing ethylene vinyl alcohol [nylon/nylon/EVOH/easy peel layer [EPL]). Among the tested polymers, the PET/WPI/nylon/LDPE film showed the highest heat‐sealing ability, tensile strength, and elastic modulus. Moreover, transparency and haze of the PET/WPI/nylon/CPP film were similar to the film without WPI coating. Taken together, our results indicate that the protein‐based coating films showing high‐oxygen and high‐water barrier properties can be manufactured using industrial facilities and could replace commercial multilayer films based on synthetic materials. Practical Application Oxygen barrier property is an important feature in food packaging materials. Therefore, protein‐coated high‐oxygen barrier multilayer films were manufactured at a pilot scale to verify the possibility of their mass production. Specifically, high‐oxygen and high‐moisture barrier coating was produced by pea and whey proteins. Finally, the protein‐based multilayer films made by an industrial facility were confirmed to be able to replace current commercial films containing synthetic barrier materials.