Multilayer Biodegradable Composite for Corrosive Packaging
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Solution Overview
Problem
Biodegradable polymeric films lack mechanical properties and are incompatible with corrosive ingredients in tobacco and pharmaceutical products, and they struggle with processing methods like co-extrusion and lamination, limiting their use in packaging.
Innovation Solution
A multilayer polymeric composite comprising a biodegradable and compostable first substrate, a metal or paper layer, and a protective coating, with specific layer thicknesses and materials like polylactic acid blends and aluminum or ARSR paper, prepared through lamination or extrusion coating methods, ensuring mechanical strength and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable polymeric films are used as packaging material, then environmental friendliness is improved, but mechanical properties deteriorate
Solution Approach 1:
The patent applies composite materials by combining biodegradable polymeric films with metal layers (aluminum, steel), paper layers, and polymer coatings to create a multilayer structure. This composite approach allows the biodegradable polymer to provide environmental benefits while the metal, paper, and coating layers contribute mechanical strength, barrier properties, and structural integrity, thereby resolving the contradiction between environmental friendliness and mechanical properties.
2Object-affected harmful factors
If biodegradable polymeric films are used for packaging, then biodegradability is improved, but compatibility with corrosive ingredients deteriorates
Solution Approach 1:
The patent uses intermediary layers such as metal layers (aluminum, steel), paper layers, and polymer coatings between the biodegradable polymeric film and the packaged contents. These intermediary layers act as barriers that protect the biodegradable polymer from direct contact with corrosive ingredients in tobacco, pharmaceutical, and food products, thereby maintaining both biodegradability and chemical compatibility.
3Ease of manufacture
If biodegradable polymeric films are processed using conventional methods, then ease of manufacture is improved, but processing compatibility deteriorates
Solution Approach 1:
The patent segments the packaging structure into multiple functional layers, each optimized for specific processing requirements. The multilayer configuration allows different layers to be processed using different methods (co-extrusion, lamination, coating) and enables the structure to adapt to various manufacturing processes like high-speed form-fill-seal packaging, thereby improving both ease of manufacture and processing compatibility.
4Strength
If multilayer composite structure is implemented, then mechanical properties are improved, but device complexity increases
Solution Approach 1:
The patent merges multiple functional requirements into a single integrated multilayer packaging structure. By combining biodegradable polymer, metal layers, paper layers, and coatings into one composite system, the design achieves improved mechanical properties, barrier properties, and processability while presenting a unified structure that can be manufactured as a single integrated component, thereby managing complexity.
Data Source
AI summary
The present disclosure discloses an environment-friendly polymeric composite prepared using biodegradable, compostable and recyclable materials, yet having good mechanical properties. The polymeric composite of the present disclosure comprises a biodegradable and compostable multilayer first substrate comprising an inner later, an outer layer and a core layer; and a second substrate comprising at least one layer selected from metal layer, metallized layer, paper layer and pretreated paper layer, such that the second substrate is disposed on the outer layer of the multilayer first substrate. The present disclosure further discloses a packaging material comprising the polymeric composite suitable for packaging tobacco based products, pharmaceutical products and food products.