Heat-Treated PVC Panels for Thermal Warpage Resistance
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Solution Overview
Problem
PVC plates are not resistant to high thermal loads, such as solar radiation, leading to warpage and curvature, which restricts their use in applications like flooring near large window areas or in homes with radiators.
Innovation Solution
A method involving heat treatment of PVC plates in an oven to at least 70°C, with controlled heating and cooling gradients to reduce internal stresses and improve resistance to thermal stress, eliminating the need for separate décor papers and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVC plates are used in applications exposed to solar radiation and thermal stress, then they are easy to manufacture and install, but they warp and bend due to poor thermal resistance
Solution Approach 1:
The patent applies heat treatment by heating the PVC plate to a temperature of at least 70°C (preferably at least the glass transition temperature) and then cooling it. This parameter change in temperature causes reorientation of macromolecules and reduction of internal stresses, thereby improving thermal resistance and preventing warpage without changing the fundamental material composition.
Solution Approach 2:
The heat treatment is performed as a preliminary action before the PVC plate is installed or used in applications exposed to thermal stress. By pre-heating and cooling the plate to reduce internal stresses and reorient macromolecules beforehand, the plate is prepared to resist future thermal loads and prevent warpage during service.
2Reliability
If heat treatment is applied to PVC plates to improve thermal resistance, then resistance to solar radiation and thermal stress increases, but additional processing time and energy are required
Solution Approach 1:
The patent specifies heating to at least 70°C or at least the glass transition temperature, which allows the treatment to be effective without requiring excessively high temperatures or prolonged heating times. This optimized temperature parameter achieves the desired macromolecular reorientation and stress reduction efficiently.
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 heat treatment significantly enhances the resistance of PVC plates to solar radiation and thermal stress, preventing distortion and curvature, while also improving durability and allowing for direct decorative printing on PVC films, reducing manufacturing costs and complexity.
Implementation Method 1
heating of the plates up to and preferably above the glass transition temperature (glass temperature) leads to a reduction in the internal stresses of the plate
Implementation Method 2
heating of the plates up to and preferably above the glass transition temperature (glass temperature) leads to a reduction in the internal stresses of the plate
Implementation Method 3
cooling the heated plate
Data Source
AI summary
A method of treating PVC plates as well as plates and panels manufactured by this method. The plates and panels, in particular wall, ceiling or floor panels, comprise a heat-treated carrier plate based on polyvinyl chloride with a density of, for example, 900 to 2,500 kg/m3 and a film applied thereon. The film is a thin PVC-film and comprises a decorative pattern directly printed thereon.