Conductive Ink Floor Heating System with Bonding Membrane
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Solution Overview
Problem
Existing floor heating systems are inefficient in providing heat to the surface, labor-intensive to install, and not suitable for wet environments like kitchens and bathrooms, as they require custom fabrication and poor adhesion with ceramic tiles.
Innovation Solution
A flexible heating system comprising a conductive ink-based radiant heater with a bonding membrane and adhesive, allowing for cuttable and water-resistant installation under ceramic tiles, using a multilayer panel with a hydraulic component coating and conductive buses for efficient heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If heating elements are installed under the subfloor between floor joists, then the heating system can be installed without replacing the subfloor, but only a relatively small percentage of the power used to generate heat actually comes through to the top surface of the decorative floor
Solution Approach 1:
The heating element is moved from a three-dimensional space between floor joists to a two-dimensional plane on top of the subfloor. This dimensional change allows the heating element to be in direct thermal contact with the decorative floor surface, eliminating the thermal barrier of the subfloor and improving heat transfer efficiency to the room surface.
2Loss of energy
If heating wires are embedded in a mortar layer, then the heating system can provide heat through the floor surface, but the installation is laborious and expensive requiring custom configuration and thick mortar layers
Solution Approach 1:
The heating element is constructed as a thin, flexible mat with heating wires arranged in a predetermined pattern on a supportive mesh or fabric. This thin-film construction eliminates the need for thick mortar layers and custom wire configuration, allowing for simple installation by laying the pre-configured mat over the subfloor and covering with a thin adhesive layer.
Solution Approach 2:
The heating wires are pre-arranged in an optimal configuration on the mat during manufacturing, eliminating the need for on-site custom configuration. This preliminary arrangement of heating elements allows for quick installation without laborious wiring work while maintaining efficient heat distribution patterns.
3Adaptability or versatility
If woven wire mesh heaters are used, then the heating mat can be placed under laminate floor or subfloor, but the mats must be custom made to fit odd-sized spaces and cannot be altered at the job site
Solution Approach 1:
The heating mat is designed with flexible properties that allow it to be cut, trimmed, and shaped on-site to fit various room configurations and floor layouts. This dynamic adaptability enables installers to customize the heating element dimensions and shape without requiring pre-fabricated custom mats for each unique space.
4Ease of operation
If polymer-based heaters are used, then the heating surface can be cuttable, but currently available products exhibit significant thickness
Solution Approach 1:
The heating element utilizes a thin polymer or fabric substrate that supports the heating wire network. This thin-film construction provides both cuttability for on-site customization and minimal thickness that does not significantly increase floor height, unlike traditional polymer-based heating systems.
5Length of stationary object
If conductive ink-based heaters are used, then the heating surface is thin and flexible, but the plastic sheets that protect the device provide a poor surface for adhesion of ceramic tiles
Solution Approach 1:
A bonding membrane with differentiated surface properties is introduced: one side provides a smooth protective surface for the conductive ink heater, while the other side features a rough or chemically treated surface optimized for ceramic tile adhesion. This local quality differentiation allows the same membrane to serve dual functions of protection and bonding.
Solution Approach 2:
The bonding membrane is constructed as a composite material combining a smooth polymer layer for heater protection with a rough or adhesive-enhanced layer for tile bonding. This composite structure integrates the protective and bonding functions in a single component, resolving the adhesion problem while maintaining the thin profile of the heating system.
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 provides efficient heat distribution to the floor surface, is cost-effective and adaptable during installation, and ensures proper adhesion and water resistance for use in wet environments.
Implementation Method 1
conductive ink-based radiant heater
Implementation Method 2
a first adhesive adapted to adhere to both the conductive ink-based radiant heater and the bonding membrane
Data Source
AI summary
A heating system which may include a bonding membrane having a water permeable lamina, an electrically conductive ink-based radiant heater, and a first adhesive adapted to adhere to both the conductive ink-based radiant heater and the bonding membrane. The heating system may be incorporated in a floor including a substrate, the heating system and a decorative floor surface. The heating system may also be in the form of a multilayer panel having a bonding membrane, an electrically conductive ink-based heater including a plurality of electrically resistive strips printed on a first polymer sheet connected by electrically conductive buses, and electrical conductors extending from the buses to at least an edge of the panel.