Abstract
Present work proposes a recycling form of multilayer food packages to avoid their incineration, landfill of wastes or re-using of their individual components. The manufacturing process of the material consists of binding several sheets by the non-simultaneous application of temperature and pressure, these being bound by the fusion of the polyethylene, without any other adhesives. The influence of elected variables (temperature, pressure, time and number of sheets) on the mechanical properties is determined. Bending tests in three points were carried out, with the purpose of obtaining flexural strength and flexural modulus. Finally, the reliability was determined through the method of Weibull using different failure estimators for the most appropriate materials (relative to flexural strength and porosity values). Light microscopy to obtain information about defectology before and after tests was used. The results obtained by this type of material are very similar to those presented by wood-based materials and present good reliability from the strength point of view.
Highlights
The multilayer packages used in the food industry have their origins in 1951 [1,2]
The cardboard provides stiffness and the aluminium protects from the environment (Figure 1)
Is shown some aspects related to the different components of Tetra Pak® that influence on the package LCA
Summary
The multilayer packages (or aseptic cardboards, Tetra Pak® , Pully, Switzerland) used in the food industry have their origins in 1951 [1,2]. They demonstrated a great capacity to protect and conserve the foods due to an excellent design of the layers (polyethylene, aluminium and cardboard) and their properties [3]. One of the most important points, in production or design, is the Life Cycle Assessment or LCA [4,5,6]. Is shown some aspects related to the different components of Tetra Pak® that influence on the package LCA
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