Multilayer Inorganic Laminar Coating for Humid Gas Barrier
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Solution Overview
Problem
Packaging materials with one layer of inorganic laminar compounds are insufficient in gas barrier properties under highly humid conditions.
Innovation Solution
A multilayer structure comprising a first layer of a first inorganic laminar compound and a second layer of a second inorganic laminar compound with a higher volume fraction, where the second layer's inorganic laminar compound volume fraction is greater than that of the first layer, is formed using a process involving coating slips and liquid mediums to enhance gas barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single layer of inorganic laminar compound is used, then the structure is simple and easy to manufacture, but the gas barrier properties are insufficient under highly humid conditions
Solution Approach 1:
The packaging material is divided into multiple layers, each containing inorganic laminar compounds with different volume fractions. The first layer has a lower volume fraction (5-50 vol%) while the second layer has a higher volume fraction (50-100 vol%), creating a segmented structure that addresses the limitations of single-layer designs under humid conditions
Solution Approach 2:
The invention uses composite materials by combining inorganic laminar compounds with organic resin matrices in different proportions across multiple layers. This composite approach allows optimization of both gas barrier properties and mechanical properties while managing the complexity through systematic composition design
2Reliability
If the volume fraction of inorganic laminar compound is increased, then gas barrier properties improve, but manufacturing precision and coating uniformity become more difficult to achieve
Solution Approach 1:
The coating process is segmented into multiple stages with different volume fractions. The first coating layer uses a lower volume fraction (5-50 vol%) to establish uniform coating and good adhesion, while the second coating layer uses a higher volume fraction (50-100 vol%) to maximize gas barrier properties. This segmentation allows each layer to be optimized for its specific function
Solution Approach 2:
Different regions of the packaging material have different compositions optimized for their specific functions. The first layer has lower inorganic content optimized for coating uniformity and adhesion, while the second layer has higher inorganic content optimized for gas barrier performance. This local quality differentiation resolves the contradiction between manufacturing precision and gas barrier properties
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 multilayer structure demonstrates superior gas barrier properties under highly humid conditions, improving adhesiveness and gas barrier performance compared to single-layer structures.
Implementation Method 1
applying a first coating slip comprising a first liquid medium and the first material contained therein onto a substrate and then removing the first liquid medium, thereby forming the first layer on the layer of the substrate
Implementation Method 2
removing the first liquid medium, thereby forming the first layer on the layer of the substrate
Data Source
AI summary
Disclosed is a multilayer structure including a first layer and a second layer adjacent to the first layer, wherein the first layer is formed of a first material comprising a first inorganic laminar compound and a second layer is formed of a second material comprising a second inorganic laminar compound with a volume fraction greater than the volume fraction of the first inorganic laminar compound in the first layer. The multilayer structure may includes a substrate layer. A method for producing the multilayer structure is also disclosed.