Composite Barrier Layer for Packaging Fluid Penetration
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Solution Overview
Problem
Current packaging materials allow significant fluid penetration, leading to rapid deterioration of packaged products such as food and cosmetics.
Innovation Solution
A composite barrier layer composed of Polyhydroxyalkanoate, polylactic acid, modified layered silicate, polyalkylene carbonate, and auxiliary agents, which is manufactured through blending and granulation followed by extrusion or injection molding, is applied to the packaging material to enhance barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional packaging materials are used, then the packaging structure is simple and easy to manufacture, but fluid penetration is high leading to rapid product deterioration
Solution Approach 1:
The patent applies composite materials by combining Polyhydroxyalkanoate (PHA) as the base polymer with modified layered silicate (MLS) nanoparticles and polyalkylene carbonate (PAC) as a compatibilizer. This composite structure creates a multi-phase system where PHA provides the matrix, MLS provides the barrier layers that reduce fluid penetration, and PAC ensures proper interfacial adhesion between the polymer and filler, thereby achieving high barrier performance while maintaining processability
Solution Approach 2:
The patent employs parameter changes by optimizing the molecular weight of PHA (50,000-200,000), the particle size and surface area of MLS (specific surface area 5-50 m²/g), and the composition ratios of the composite components. These parameter optimizations enable the material to achieve enhanced barrier properties against water vapor and oxygen while maintaining appropriate mechanical properties and processability for manufacturing
2Reliability
If barrier properties are enhanced to reduce fluid penetration, then product quality is maintained longer, but manufacturing complexity increases
Solution Approach 1:
The patent uses polyalkylene carbonate (PAC) as an intermediary or compatibilizer between the hydrophobic PHA matrix and the hydrophilic modified layered silicate filler. The PAC contains both hydrophobic and hydrophilic segments that can interact with both components, ensuring uniform dispersion of MLS in the PHA matrix and strong interfacial adhesion, thereby simplifying the manufacturing process by preventing aggregation and ensuring homogeneous composite formation during blending and extrusion
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 composite barrier layer effectively reduces fluid penetration, thereby extending the shelf life and maintaining the quality of packaged products.
Implementation Method 1
some fluids can permeate the packaging material in a large amount and come into contact with the product in the packaging material
Data Source
AI summary
A composite for manufacturing a barrier layer, a barrier layer, a method for manufacturing the barrier layer, and a packaging material are provided. Based on the total mass of the composite as 100 parts by mass, the composite includes the following components by mass: Polyhydroxyalkanoate, 70 to 96 parts by mass; polylactic acid, 1 to 15 parts by mass; modified layered silicate, 1 to 5 parts by mass; polyalkylene carbonate, 1 to 20 parts by mass; and auxiliary agent, 1.3 to 12 parts by mass.