Biodegradable Foamed Sheets Using PLA Resin Layers
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Solution Overview
Problem
The use of petroleum-based polyvinyl chloride (PVC) sheets in building structures poses environmental concerns due to resource depletion and harmful substance emission, necessitating a sustainable alternative.
Innovation Solution
Biodegradable sheets are developed using a base layer, foamed layer, printed layer, and partially foamed layer, with at least one layer comprising polylactic acid (PLA) resin derived from renewable vegetable resources, which reduces environmental impact and provides a substitute for PVC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polyvinyl chloride (PVC) resin is used for sheet production, then manufacturing process and material availability are established, but environmental harm and resource depletion occur
Solution Approach 1:
The patent changes the chemical composition parameter of the resin material from petroleum-based PVC to plant-based PLA (polylactic acid), transforming the material's origin from non-renewable to renewable resources while maintaining the sheet manufacturing process
Solution Approach 2:
The patent uses composite material structure with multiple layers (base layer, foamed layer, printed layer, partially foamed layer) where at least one layer contains PLA resin, combining different material properties to achieve both manufacturability and environmental friendliness
2Quantity of substance
If petroleum-based materials are used, then material supply is currently adequate, but resource depletion will occur in the future
Solution Approach 1:
The patent changes the source parameter of the resin from petroleum-based to plant-based resources, ensuring long-term sustainability by using renewable materials that can be continuously produced without depleting finite resources
3Ease of manufacture
If PVC sheets are disposed of, then waste removal is simple, but harmful substances are emitted
Solution Approach 1:
The patent converts the disposal process from harmful to beneficial by using PLA resin that biodegrades into harmless natural substances, transforming waste disposal from an environmental burden into an eco-friendly process that returns materials to nature
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 biodegradable sheets address the supply issues of petroleum-based materials, emit fewer harmful substances, and are safely disposable, making them suitable for various applications including wallpapers and interior decorative elements.
Implementation Method 1
a foamed layer formed on the base layer, and a partially foamed layer formed on the printed layer wherein at least one layer of the foamed layer and the partially foamed layer includes a polylactic acid (PLA) resin
Data Source
AI summary
The present invention relates to sheets. The sheets include a base layer, a foamed layer formed on the base layer, a printed layer formed on the foamed layer, and a partially foamed layer formed on the printed layer. At least one layer of the foamed layer and the partially foamed layer includes a polylactic acid (PLA) resin. The sheets are biodegradable.