Roofing Panel Partial PVC Coating for Bending and Sealing
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Solution Overview
Problem
Existing roofing systems with corrugated insulated panels face challenges in large-scale installations, where joints remain exposed to the environment for extended periods, risking water infiltration, and the manufacturing process causes deformation of PVC coatings during bending.
Innovation Solution
The panels feature partial PVC coating, leaving uncovered peripheral bands for bending and adhesive tape application, allowing for temporary sealing before final bridging strip welding, ensuring secure and efficient installation and manufacturing without damaging the PVC layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire surface of the flat sheet is coated with PVC membrane for water-tightness, then water infiltration is prevented, but the bending process causes deformation and damage to the PVC coating
Solution Approach 1:
The flat sheet is coated with PVC membrane only on specific areas (central region) rather than the entire surface. The peripheral bands remain uncovered to allow bending without PVC damage, while the central coated area provides sufficient water-tightness for the panel function.
2Productivity
If all panels are mounted before applying bridging strips, then installation efficiency is improved, but joints remain exposed to water infiltration for extended periods
Solution Approach 1:
Panels are pre-assembled with uncovered peripheral bands that allow for quick positioning and temporary securing. The bridging strips are then applied in a subsequent step to seal the joints, preventing water infiltration during the assembly process while maintaining overall installation efficiency.
3Manufacturing precision
If partial PVC coating is applied to leave uncovered peripheral bands, then bending damage is prevented, but water infiltration risk increases at the edges
Solution Approach 1:
Bridging strips serve as intermediary elements that seal the joints between panels at the peripheral bands. These strips compensate for the lack of PVC coating at the edges, preventing water infiltration while allowing the uncovered bands to perform their bending function.
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
This method enables faster, secure installation and prevents water infiltration during large-scale roofing projects while protecting the PVC coating from bending-related damage, ensuring a longer lifespan against weather elements.
Implementation Method 1
the sheet is protected simply by passivation or by painting
Implementation Method 2
the gap between panels can also be sealed by applying a PVC strip that is heat sealed (heat welded) to the contiguous parts of two adjacent panels
Data Source
Figure 1~2
Figure 3~4
AI summary
It is disclosed a composite panel for external cladding, consisting of a pair of opposing sheets with the interposition of a layer of insulating material, at least one of the sheets (10), constituting the external surface of the panel, being essentially flat except in correspondence to the longitudinal sides where bead-like bendings are provided, wherein said substantially flat panel (10) has an external surface coating (10') of weldable protective material extending over the entire surface except on two opposing guard bands (10") in correspondence with the longitudinal sides of the panel, these bands (10") being continuous. There is also disclosed a method of cladded roofing with the panel and a sheet for manufacturing such a panel.