Alternative packaging concepts for two dry, shelf‐stable food products were evaluated. A trade‐off between recyclability (monolayer materials) and performance (multilayered high‐barrier materials) was made for the packaging materials. Caramellized cookies were packaged in flowpacks made of PP film (OTR 1307 cc/m²/d, WVTR 5 g/m²/d), acryl‐coated PVdC/PP film (OTR 21.8 cc/m²/d, WVTR 4.2 g/m²/d) as a reference material and metallized PP (MPP) film (OTR 31.2 cc/m²/d, WVTR 0.4 g/m²/d) and stored at 22°C and 50% relative humidity. Texture was compromised after 6 months of storage for the former two materials, while the latter provided an extension of textural acceptability. Whole milk powder was packaged in unsealed PE bags as a reference, representing a typical paper bag with a PE liner that is stapled shut without a seal. Alternative packages were sealed PE bags (OTR 1464 cc/m²/d, WVTR 3 g/m²/d), PE/PA/EVOH/PA/PE (OTR 0.25 cc/m²/d, WVTR 0.95 g/m²/d) and PA/EVOH/PA/PE (OTR 1.24 cc/m²/d, WVTR 8 g/m²/d) multilayer bags, and PP/Al/PE (OTR 0.1 cc/m²/d, WVTR 0.1 g/m²/d) bags and stored at room temperature and relative humidity between 70% and 90%. Unsealed bags were found to be unacceptable for storage at high humidity, due to excessive caking, discolouration and mould growth. Sealed PE bags provided adequate protection against moisture, yet not against oxygen ingress, leading to oxidative off‐odours. The barrier efficiency of PA/EVOH/PA/PE was compromised by the high humidity. Both PE/PA/EVOH/PA/PE and PP/Al/PE bags provided adequate protection for over a year.

中文翻译：

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通过权衡可持续性和性能来选择干食品的包装材料：以饼干和奶粉为例

对两种干燥，耐贮存食品的替代包装概念进行了评估。在包装材料的可回收性（单层材料）和性能（多层高阻隔材料）之间进行了权衡。袋装的曲奇包装在由PP薄膜（OTR 1307 cc / m ² / d，WVTR 5 g / m ² / d），丙烯酸涂层的PVdC / PP薄膜（OTR 21.8 cc / m ² / d，WVTR 4.2 g）制成的流袋中/ m ² / d）作为参考材料和金属化PP（MPP）膜（OTR 31.2 cc / m ² / d，WVTR 0.4 g / m ²/ d）并储存在22°C和50％相对湿度下。前两种材料在存放6个月后，质地受到损害，而后者则提供了质地可接受性的扩展。将全脂奶粉包装在未密封的PE袋中作为参考，代表具有带PE衬纸的典型纸袋，该衬纸被钉合在一起而没有密封。替代包装为密封PE袋（OTR 1464 cc / m ² / d，WVTR 3 g / m ² / d），PE / PA / EVOH / PA / PE（OTR 0.25 cc / m ² / d，WVTR 0.95 g / m ² / d）和PA / EVOH / PA / PE（OTR 1.24 cc / m ² / d，WVTR 8 g / m ² / d）多层袋和PP / Al / PE（OTR 0.1 cc / m ² / d， WVTR 0.1克/平方米²/ d）袋子，并在室温和70％到90％的相对湿度下存储。发现未密封的袋子由于过度结块，变色和霉菌生长而不能在高湿度下存储。密封的PE袋可提供足够的防潮保护，但不能防止氧气进入，从而导致氧化异味。高湿度损害了PA / EVOH / PA / PE的阻隔效率。PE / PA / EVOH / PA / PE和PP / Al / PE袋均可提供一年以上的充分保护。