Barrier Coating Composition for Perishables With Balanced Moisture Barrier
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Solution Overview
Problem
Existing coatings for perishable items, such as fruits and vegetables, fail to achieve a balanced combination of mechanical and barrier properties, leading to issues like excessive water vapor loss, flavor problems, and unsuitable mass loss, while also being environmentally costly and inefficient.
Innovation Solution
A barrier coating composition comprising an active hydrogen component (AHC) and a polyvalent metal crosslinking agent (PMCA), optionally with additives, which can include polysaccharides, lipids, and other agents to enhance mechanical and barrier properties, applied in a multi-part system for improved shelf-life and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polysaccharide-based coatings or polypeptide-based coatings are applied to extend shelf-life, then mechanical film properties are improved, but barrier properties deteriorate leading to excessive water vapor loss
Solution Approach 1:
The patent applies composite materials by combining polysaccharide or polypeptide base coatings with lipid-based barrier layers. This multi-layer composite structure allows the polysaccharide/polypeptide component to provide mechanical strength and flexibility while the lipid layer provides the necessary barrier properties to reduce water vapor loss, thus resolving the contradiction between mechanical properties and barrier properties.
2Loss of substance
If lipid-based coatings are applied to improve barrier properties, then water vapor loss is reduced, but mechanical properties deteriorate
Solution Approach 1:
The patent uses composite materials by creating a multi-layer coating system where lipid-based layers provide the barrier function to reduce water vapor loss, while polysaccharide or polypeptide layers provide the mechanical strength and flexibility. This division of functional roles within the composite structure resolves the contradiction between barrier properties and mechanical properties.
3Loss of substance
If thick wax-based coatings are applied to improve barrier properties, then water loss is reduced, but flavor problems occur due to anaerobic fermentation
Solution Approach 1:
The patent applies local quality by using thin, controlled barrier layers rather than thick coatings. The multi-layer structure provides sufficient barrier properties to reduce water loss while maintaining adequate oxygen permeability to prevent anaerobic fermentation, thus avoiding flavor problems. Each layer is optimized for its specific function without excessive thickness.
4Reliability
If air transport and refrigeration are employed to avoid timing-related spoilage, then quality degradation is reduced, but cost increases and environmental friendliness deteriorates
Solution Approach 1:
The patent applies preliminary action by coating the produce with protective compositions before harvest or early in the supply chain. This pre-application of protective barriers extends shelf-life and maintains quality, reducing the need for subsequent energy-intensive refrigeration and expedited transport, thus addressing the contradiction between quality maintenance and energy consumption.
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 composition provides enhanced shelf-life and quality of perishable items by balancing mechanical and barrier properties, reducing water permeability, and maintaining flavor, while being environmentally friendly and cost-effective.
Implementation Method 1
A barrier coating composition comprising an active hydrogen component (AHC) and a polyvalent metal crosslinking agent (PMCA)
Implementation Method 2
certain polysaccharide-based coatings and certain polypeptide-based coatings have tended to exhibit poor barrier properties. Such lack of barrier properties typically leads to unsuitable mass loss in coated fruits or vegetables due to excessive water vapor loss
Data Source
AI summary
Barrier coating compositions, wash compositions, and other compositions for perishables and methods, systems, kits, and coated perishables relating thereto are provided. Fresh fruits and vegetables, in particular, can benefit from the teachings of the present disclosure. Preferred barrier coating compositions include an active hydrogen component that preferably includes one or more of a lipid, a polysaccharide, a polypeptide, or a combination thereof. In addition to providing active hydrogen groups, the active hydrogen component preferably functions as a binder and/or barrier component. The barrier coating compositions may include one or more materials to facilitate crosslinking of the resulting coating.