Moulded Pulp Food Packaging With Biodegradable Polyester Barrier
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Solution Overview
Problem
Conventional food packaging units with additional film layers are not sustainable and limit recycling possibilities, while also imposing restrictions on their use and performance.
Innovation Solution
A biodegradable aliphatic polyester is integrated into moulded pulp material to create a compostable food packaging unit, enhancing sustainability and recycling properties, and improving barrier, heat sealability, and dimensional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional film layer is added to the packaging unit to act as a barrier, then barrier properties are improved, but sustainability and recycling possibilities deteriorate
Solution Approach 1:
The patent merges the barrier function with the moulded pulp material itself by incorporating biodegradable aliphatic polyester into the pulp structure. This eliminates the need for separate film layers while maintaining barrier properties against moisture and grease, and ensures the entire packaging unit remains compostable and recyclable.
Solution Approach 2:
The patent uses composite materials by combining moulded pulp with biodegradable aliphatic polyester. This creates a multi-functional material that provides both the structural properties of pulp and the barrier properties of polyester, while maintaining biodegradability and compostability throughout the entire packaging unit.
2Reliability
If an additional film layer is added to the packaging unit, then barrier properties are improved, but recycling possibilities are limited
Solution Approach 1:
The barrier function is merged into the moulded pulp material through incorporation of biodegradable aliphatic polyester, creating a homogeneous composite structure that can be recycled or composted as a single material system, eliminating the complexity of separating different material layers.
3Object-affected harmful factors
If biodegradable aliphatic polyester is mixed into the moulded pulp material, then sustainability is improved, but manufacturing complexity increases
Solution Approach 1:
The biodegradable aliphatic polyester is incorporated into the moulded pulp material during the manufacturing process itself, rather than as a post-processing step. This preliminary integration simplifies the overall manufacturing workflow by combining material preparation and barrier function creation in a single integrated process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The biodegradable packaging unit achieves improved sustainability, reduced environmental impact, enhanced barrier properties, and better recycling capabilities, along with improved heat sealability and dimensional stability.
Implementation Method 1
biodegradable relates to degradation resulting from the action of microorganisms such as bacteria, fungi and algae
Implementation Method 2
Compostable relates to degradation by biological process to yield CO2, water, inorganic compounds and biomass
Data Source
AI summary
The present invention relates to a biodegradable food packaging unit from a moulded pulp material and a method for manufacturing such biodegradable packaging unit. The packaging according to the invention comprises a food receiving or carrying compartment, wherein the moulded pulp material comprises an amount of a biodegradable aliphatic polyester, wherein the food packaging unit is a compostable food packaging unit. In a preferred embodiment the amount of biodegradable aliphatic polyester is in the range of 0.5-20 wt. %, more preferably in the range of 1-15 wt. %.