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| Layer | Material Composition | Functional Role |
| Surface Layer (The Shield) | High-Weatherability ASA | Blocks 99% of UV rays; provides anti-aging properties and permanent color. |
| Core Layer (The Skeleton) | Modified Toughness PVC | Provides structural rigidity, impact resistance, and sound insulation. |
| Bonding Interface | Molecular Fusion | Ensures zero peeling or delamination for the entire service life. |
| Bottom Layer | Corrosion-Resistant Polymer | Protects the underside from internal building humidity and chemical vapors. |
| Aging Stressor | Greenutile ASA Performance | Standard PVC Performance |
| UV Radiation | Maintains molecular chains; no "chalking" | Chains break down; surface becomes dusty/white |
| Thermal Cycling | Excellent dimensional stability | Prone to micro-cracking and shrinking |
| Color Retention | ΔE≤5.0 after 10,000 hours QUV | Rapid fading and yellowing within 2-3 years |
| Surface Hardness | Scratch-resistant and anti-static | Softens in heat; attracts dust and soot |


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