Biodegradable 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 emissions, necessitating a sustainable alternative.

Innovation Solution

Biodegradable sheets are developed using a base layer, a resin layer with polylactic acid (PLA) resin, and optional additional layers such as a printed or surface-treated layer, which are formed using renewable vegetable resources, reducing environmental impact and providing a substitute for PVC.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If PVC sheets are used in building structures, then aesthetic and functional properties are maintained, but environmental harm increases due to harmful emissions and resource depletion

Engineering Contradiction:

Improveenvironmental harmVSAvoidfunctional properties

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the material parameter from petroleum-based PVC to plant-based PLA resin, fundamentally altering the chemical composition to eliminate harmful emissions while maintaining the sheet's functional properties for building applications

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite sheet structure combining base layer, resin layer with PLA resin, and printed layer, where the PLA resin provides both aesthetic appearance and environmental benefits, replacing traditional PVC while maintaining functional reliability

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If petroleum-based resins are used for sheet production, then manufacturing processes are well-established, but raw material supply becomes vulnerable to resource depletion

Engineering Contradiction:

Improvemanufacturing processVSAvoidraw material supply

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent transitions from petroleum-based resin to plant-based PLA resin, changing the raw material source parameter from non-renewable fossil fuels to renewable agricultural products, thereby securing long-term supply while maintaining manufacturing feasibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent adopts biodegradable PLA resin that can be safely discarded after use, aligning with a disposable model that eliminates the need for long-term material recovery and reduces supply chain vulnerability to resource depletion

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Object-generated harmful factors

If conventional PVC sheets are disposed of, then waste management is straightforward, but environmental burden increases due to harmful substance emission

Engineering Contradiction:

Improveharmful substance emissionVSAvoidwaste disposal

Core Design Contradiction:

Object-generated harmful factorsVSLoss of substance

Solution Approach 1:

The patent converts the traditional waste disposal problem into a benefit by using biodegradable PLA resin that naturally decomposes into harmless substances, transforming the harmful disposal process into an environmentally friendly one that reduces pollution and resource depletion

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS8962118B2Biodegradable sheets

Publication Date: 2015.02.24 LG HAUSYS LTD

AI summary

The present invention relates to sheets. The sheets include a base layer, a resin layer formed on the base layer, and a printed layer formed on the resin layer. The resin layer includes a polylactic acid (PLA) resin. The sheets are biodegradable.