Composite Laminate Moisture Barrier for Agrochemicals
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Solution Overview
Problem
Conventional packaging materials for moisture-sensitive agrochemicals, such as polyethylene and biaxially oriented polyester, fail to provide adequate mechanical strength and moisture resistance, leading to interaction with the packaged material and degradation of sensitive compounds like acephate.
Innovation Solution
A composite laminate packaging system comprising a water-soluble primary package made of polymers like polyvinyl alcohol and a secondary package with multiple layers, including thermoplastic polymers, metallic layers, and a specific configuration of polyethylene terephthalate and aluminum, which enhances mechanical strength and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyethylene is used for packaging moisture-sensitive agrochemicals, then moisture barrier properties are improved, but mechanical strength deteriorates
Solution Approach 1:
The patent applies composite materials by combining polyethylene (providing moisture barrier properties) with biaxially oriented polyester (providing mechanical strength) in a multi-layer packaging structure. This composite approach allows the package to simultaneously achieve both moisture resistance and adequate mechanical strength that neither material can provide alone.
2Strength
If biaxially oriented polyester is used for packaging, then mechanical strength is improved, but moisture resistance deteriorates
Solution Approach 1:
The patent uses a composite multi-layer structure where biaxially oriented polyester provides the necessary mechanical strength while polyethylene layers provide the moisture barrier properties. This composite material approach resolves the contradiction by assigning different functions to different material layers.
3Device complexity
If conventional single-layer packaging is used, then device complexity is reduced, but packaging performance deteriorates
Solution Approach 1:
The patent segments the packaging into multiple functional layers, with each layer performing a specific function (moisture barrier, mechanical strength, sealing). This segmentation allows the complex packaging performance requirements to be met by distributing functions across multiple specialized layers rather than requiring a single complex material.
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 described packaging system significantly improves the mechanical strength and moisture resistance of agrochemicals, preventing degradation and ensuring compliance with regulatory water content standards, as demonstrated by stability tests and comparative examples.
Implementation Method 1
a secondary package with multiple layers, including thermoplastic polymers, metallic layers, and a specific configuration of polyethylene terephthalate and aluminum
Implementation Method 2
a composite laminate packaging system comprising a water-soluble primary package made of polymers like polyvinyl alcohol and a secondary package with multiple layers, including thermoplastic polymers
Implementation Method 3
a water-soluble primary package made of a water soluble polymer selected from polyethylene glycol or a block copolymer comprising polyethylene glycol
Data Source
AI summary
A packaged moisture sensitive product and a method for packaging a moisture sensitive product. The packaging comprises a primary package, and a secondary 5 package comprising a composite laminate comprising at least one thermoplastic layer and at least one metallic layer.