Fiber Cement Shingle Textured Surface and Coating System
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Solution Overview
Problem
Fiber cement shingles struggle to replicate the natural appearance of wood shingles, particularly cedar shingles, due to uniform texture and lack of three-dimensional imperfections, resulting in a manufactured and fake appearance.
Innovation Solution
A fiber cement shingle system with varied texture and color, featuring a textured surface with a depth of relief ranging from 0.045 to 0.085 inches, combined with a specific coating system including a two-part waterborne epoxy sealer, basecoat, and topcoat, to mimic the appearance of sawn cut wood, with the topcoat being semi-transparent and containing UV absorbers and Hindered Amine Light Stabilizers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fiber cement shingles use a uniform manufactured texture, then manufacturing precision is improved, but the natural appearance of wood is lost
Solution Approach 1:
The patent applies local quality by creating different texture patterns in different areas of the shingle surface. The embossed patterns include circular saw marks, straight grain, and cathedral patterns with varying depths and orientations, mimicking the natural variability found in real wood rather than using a uniform texture across the entire surface.
Solution Approach 2:
The patent employs asymmetry by using irregular, non-repeating patterns that lack perfect symmetry. The circular saw marks have varying diameters and positions, the grain patterns are asymmetric in their arrangement, and the overall texture design intentionally avoids uniform repetition to replicate the imperfect, asymmetric nature of natural wood grain.
2Ease of manufacture
If fiber cement shingles have a flat manufactured surface, then ease of manufacture is improved, but light reflection becomes monochromatic and artificial
Solution Approach 1:
The patent applies curvature by creating three-dimensional embossed patterns with rounded edges and varied surface contours. The circular saw marks feature curved boundaries, the cathedral patterns have arched forms, and the overall texture includes raised and recessed areas that create curved light reflection paths, eliminating the flat, monochromatic appearance.
Solution Approach 2:
The patent transitions from a two-dimensional flat surface to a three-dimensional textured surface by embossing patterns with depth. The texture patterns have raised portions and valleys that create multiple light reflection angles and shadows, adding a dimensional aspect that mimics the complex light interaction with real wood surfaces.
3Manufacturing precision
If fiber cement shingles use embossed patterns in wet greensheet, then manufacturing precision is improved, but pattern distortion and blurring occur
Solution Approach 1:
The patent applies parameter changes by optimizing the embossing process parameters including pressure, temperature, and timing to achieve sharp pattern definition without distortion. The process parameters are controlled to allow the fiber cement greensheet to properly receive and hold the embossed pattern, preventing blurring while maintaining manufacturing efficiency.
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
The system effectively creates a natural appearance of sawn cut wood, with randomized light reflection and color differences between shingles, enhancing the visual appeal and durability of the shingles.
Implementation Method 1
reflection of light and the color difference from shingle to shingle is randomized within certain controlled parameters
Implementation Method 2
The topcoat is semi-transparent and containing UV absorbers and Hindered Amine Light Stabilizers
Implementation Method 3
The topcoat is semi-transparent and containing UV absorbers and Hindered Amine Light Stabilizers
Data Source
AI summary
Disclosed herein is a fiber cement cladding system such as fiber cement shingles or shakes which can have the appearance of authentic wood. Each individual fiber cement shingle or shake comprises a textured surface having a depth of relief and a coating system disposed on the textured surface. The coating system may include a sealing agent, a basecoat, and a topcoat. In some embodiments, the basecoat is disposed on at least a portion of the sealing agent and the topcoat is disposed on at least a portion of the basecoat. In some embodiments, the basecoat comprises a DFT of 1 to 3 mils and the topcoat comprises a DFT of 0.05 to 2 mils. In some embodiments, the depth of relief of the textured surface of the fiber cement shingle is about 0.045″ to 0.085″.