Peelable MAP Fiber Liner Structure for Oxygen and Moisture Barrier
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Solution Overview
Problem
Conventional MAP containers rely heavily on non-biodegradable plastics, contributing to environmental pollution and waste accumulation, while achieving effective modified atmosphere preservation remains a challenge.
Innovation Solution
A MAP container with a multi-layered peelable liner composed of biodegradable molded fiber structure and layers of polyethylene, polyamide, and ethylene vinyl alcohol, optimized for moisture and oxygen barriers, ensuring secure sealing and easy peelability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional non-biodegradable plastics are used for MAP containers, then effective modified atmosphere preservation and moisture barrier are achieved, but environmental pollution and waste accumulation worsen
Solution Approach 1:
The patent employs a multi-layer composite structure combining biodegradable molded fiber with plastic liner layers (polyethylene, polyamide, ethylene vinyl alcohol). This composite approach maintains the moisture and oxygen barrier properties necessary for MAP while the biodegradable fiber component reduces environmental persistence and pollution compared to conventional single-use plastics.
2Object-generated harmful factors
If biodegradable molded fiber structure is used, then environmental friendliness is improved, but moisture and oxygen barrier performance deteriorates
Solution Approach 1:
The molded fiber structure is combined with plastic liner layers that provide the necessary moisture and oxygen barrier properties. The biodegradable fiber provides structural integrity and environmental benefits, while the plastic liner layers (polyethylene, polyamide, ethylene vinyl alcohol) supply the required barrier performance against moisture and oxygen transmission.
Solution Approach 2:
A flexible plastic liner is attached to the molded fiber structure to provide the moisture and oxygen barrier. The liner acts as a thin film layer that conforms to the fiber structure while delivering the necessary barrier properties that the biodegradable material alone cannot achieve.
3Reliability
If multi-layered peelable liner is attached to molded fiber structure, then seal integrity and MAP barrier are improved, but device complexity increases
Solution Approach 1:
The packaging system is segmented into distinct functional layers: the molded fiber structure providing structural support and the multi-layer plastic liner providing barrier and sealing functions. This segmentation allows each component to be optimized for its specific function while maintaining overall system performance.
Solution Approach 2:
The plastic liner is merged with the molded fiber structure through attachment methods that create a unified packaging system. The liner is secured to the fiber structure to provide both barrier protection and seal integrity, combining the advantages of biodegradable material with plastic barrier properties in a single integrated solution.
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 solution maintains food quality and extends shelf life by reducing oxygen exposure and moisture loss, while being environmentally friendly and recyclable, thus addressing plastic waste issues.
Implementation Method 1
heating the multi-layered peelable liner with a heating element
Implementation Method 2
conforming the heated multi-layered peelable liner to a surface of the molded fiber structure with a vacuum suction element
Data Source
AI summary
A modified atmosphere packaging (MAP) container, comprising a molded fiber structure that comprises a set of perforations distributed across the molded fiber structure, a multi-layered peelable liner removably attached to a first surface corresponding to a product contact surface of the molded fiber structure. The multi-layered peelable liner comprises a plurality of polyethylene (PE) layers in the range of 40-65 weight percent (wt. %), a plurality of polyamide (PA) layers in the range of 10 to 25 wt. %, and an ethylene vinyl alcohol (EVOH) layer in the range of 5-25 wt. %.