Multilayer Vehicle Paint Protection Film for Stain Resistance
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Solution Overview
Problem
Existing paint protection films for vehicles lack durability, stain resistance, and aesthetic qualities, often yellowing over time and failing to maintain transparency.
Innovation Solution
A multilayer paint protection film comprising a coating layer of polycaprolactone-based polyurethane, a base layer of polyester-based thermoplastic polyurethane, and an adhesive layer, with specific solvent compositions and ratios to ensure excellent stain resistance, durability, and no yellowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single polyurethane film layer is used, then the manufacturing process is simple, but the durability and stain resistance are insufficient
Solution Approach 1:
The patent divides the protection film into multiple functional layers: a top polyurethane layer for durability and stain resistance, and a bottom adhesive layer for bonding. This segmentation allows each layer to specialize in its function, resolving the contradiction between manufacturing simplicity and performance requirements.
Solution Approach 2:
The patent uses composite material structure combining polyurethane resin for the protective top layer and adhesive resin for the bonding layer. This composite approach enables the film to simultaneously achieve high durability, stain resistance, and proper adhesion, overcoming the limitations of single-material films.
2Illumination intensity
If conventional paint protection films are used, then transparency is maintained, but yellowing occurs after prolonged exposure to external environment
Solution Approach 1:
The patent modifies the chemical composition parameters of the polyurethane resin by incorporating specific functional groups and using controlled polymerization conditions. This parameter optimization enhances UV resistance and prevents yellowing while maintaining high transparency, resolving the time-dependent degradation issue.
Solution Approach 2:
The patent employs a sacrificial bottom adhesive layer that can be replaced if needed, while the top protective layer maintains long-term stability. This design allows the durable top layer to focus on long-term UV and stain resistance without being compromised by the temporary nature of the adhesive layer.
3Illumination intensity
If aesthetic qualities are prioritized with transparent films, then appearance is enhanced, but durability and stain resistance are compromised
Solution Approach 1:
The patent applies different material properties to different locations within the film structure: the top surface layer uses polyurethane with optimized optical properties for aesthetic transparency and visual appeal, while the bottom layer provides the necessary adhesion and structural support. This local differentiation allows the film to simultaneously achieve aesthetic quality and durability.
Solution Approach 2:
By combining transparent polyurethane resin in the top layer with appropriate adhesive resin in the bottom layer, the patent creates a composite structure where each material contributes its strengths. The result is a film that maintains high aesthetic transparency while achieving superior durability and stain resistance through the synergistic combination of materials.
Data Source
AI summary
Proposed is a paint protection film with excellent self-healing ability, stain resistance, and weather resistance. When being applied to vehicles, damage to the painted surface, such as chipping, scratches, and the like occurring in the middle of driving, can be effectively prevented. In addition, even when exposed to the external environment for a long period of time, the transparency of the film can be maintained. Furthermore, discoloration or stains caused by contaminants can be prevented, thereby maintaining aesthetics.