Multilayer Biodegradable Packaging With Barrier And Sealing Layers
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Solution Overview
Problem
Conventional packaging materials are difficult to recycle, take a long time to decompose, and lack adequate barrier, printability, antifouling, and water resistance properties, leading to environmental pollution.
Innovation Solution
A multilayer packaging material comprising a surface coating layer, a first fibrous layer, a second fibrous layer, and a sealing coating layer, with optional barrier and adhesive layers, using water-based resins and biodegradable materials to enhance recyclability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If biodegradable materials (PLA) are used instead of conventional materials (PET, nylon, aluminum), then recyclability and biodegradability are improved, but barrier properties to oxygen and moisture deteriorate
Solution Approach 1:
The patent applies composite materials by combining biodegradable PLA with natural fibers (cellulose, starch, chitosan) to create a multi-component packaging material that maintains biodegradability while improving barrier properties through the synergistic effects of different natural materials
Solution Approach 2:
The patent makes natural fibers serve multiple functions simultaneously: they act as barrier layers against oxygen and moisture, provide structural reinforcement, enable biodegradability, and offer surface properties for printing and sealing, thereby replacing multiple conventional material layers
2Object-generated harmful factors
If packaging materials are made from biodegradable materials and paper, then recyclability is improved, but sealing properties deteriorate causing delamination
Solution Approach 1:
The patent introduces natural fiber materials as intermediary components between biodegradable plastic layers and paper layers, providing compatible bonding surfaces that enable effective sealing while maintaining the biodegradable nature of the entire structure
Solution Approach 2:
The patent modifies the surface properties of natural fibers through treatment processes that enhance their thermal and adhesive characteristics, enabling them to provide adequate sealing performance at elevated temperatures without compromising biodegradability
3Reliability
If conventional packaging materials (PET, PP, aluminum foil) are used, then barrier properties and mechanical strength are improved, but recyclability and biodegradability deteriorate
Solution Approach 1:
The patent changes the fundamental material parameters from synthetic polymers to natural-based materials, achieving comparable or superior barrier properties through optimized fiber composition, density, and crystalline structure while ensuring complete biodegradability
Solution Approach 2:
The patent adopts disposable biodegradable packaging materials made from naturally decomposable substances, replacing durable but polluting conventional materials with environmentally friendly alternatives that complete their lifecycle through natural decomposition processes
4Object-generated harmful factors
If biodegradable materials are used for packaging, then environmental friendliness is improved, but printability and antifouling properties deteriorate
Solution Approach 1:
The patent applies local quality by treating specific regions or surfaces of the biodegradable packaging material with coatings or modifications that enhance printability and antifouling properties, while maintaining the bulk material's biodegradability and environmental friendliness
Data Source
AI summary
The present invention relates to an eco-friendly packaging material and a manufacturing method therefor. Specifically, the packaging material according to an embodiment of the present invention includes a surface coating layer, a first fiber layer, a second fiber layer, and a sealing coating layer, and thus has high recyclability and decomposes well in the soil and ocean, and may have excellent oxygen and/or moisture barrier properties, printability, antifouling/water resistance properties, sealing properties, etc.