Biodegradable PLA Adhesive Sheets Resolving PVC Environmental Harm
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Solution Overview
Problem
Conventional PVC sheets pose environmental concerns due to their non-renewable petroleum-based resources and harmful emissions, and require additional work for attachment.
Innovation Solution
Biodegradable sheets are developed using a PLA resin in the adhesive and resin layers, which are derived from vegetable resources, eliminating the need for extra attachment work and reducing environmental harm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If PVC sheets are used, then good adhesion and durability are achieved, but environmental harm and resource depletion occur
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive layer by using PLA resin instead of traditional PVC-based adhesives. This parameter change maintains adhesive functionality while eliminating the harmful environmental factors associated with PVC, particularly the emission of harmful substances during production and disposal.
Solution Approach 2:
The patent employs composite material structure with multiple layers including PLA resin in the adhesive layer, base layer, and resin layer. This composite approach allows each layer to contribute specific properties - PLA provides biodegradability and reduced environmental harm, while the layered composite structure ensures overall adhesion performance and durability.
2Ease of operation
If additional attachment work is required, then strong bonding is achieved, but convenience and productivity are reduced
Solution Approach 1:
The adhesive layer is designed to provide self-adhesive properties, allowing the sheet to attach to surfaces without requiring additional attachment work or separate adhesive application steps. The PLA-based adhesive layer inherently provides both the bonding strength and the convenience of easy application, eliminating the need for extra attachment procedures.
Solution Approach 2:
The patent merges the adhesive function directly into the sheet structure by incorporating the adhesive layer as an integral part of the multi-layer construction. This combination ensures that bonding strength and attachment convenience are achieved simultaneously through the integrated adhesive layer, rather than requiring separate attachment steps.
3Object-affected harmful factors
If PLA resin is used, then environmental friendliness and biodegradability are improved, but manufacturing complexity may increase
Solution Approach 1:
The patent changes the material composition parameter by using PLA resin in specific layers (adhesive layer and resin layer), which improves environmental friendliness and biodegradability. The manufacturing process manages this change by incorporating PLA resin through standard extrusion or coating techniques, maintaining ease of manufacture while achieving the environmental benefits.
Solution Approach 2:
The patent uses a composite multi-layer structure where PLA resin is strategically placed in the adhesive layer and resin layer, while other layers may use different materials optimized for their specific functions. This composite approach allows the manufacturing process to leverage established techniques for each layer type, managing complexity while achieving superior environmental performance.
Data Source
AI summary
The present invention relates to sheets. The sheets include an adhesive layer, a base layer formed on the adhesive layer, a resin layer formed on the base layer, and a printed layer formed on the resin layer. Each of the adhesive layer and the resin layer includes a polylactic acid (PLA) resin. The sheets are biodegradable.