Conductive Micro Lines in Laminated Glass Interlayers
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Solution Overview
Problem
Conventional methods for defrosting laminated glass in automotive and architectural applications face challenges such as complex manufacturing processes, mechanical damage, and visual contamination, while providing either inadequate functionality or excessive visual impact.
Innovation Solution
The use of polymer films with micro lines formed from conductive materials, such as copper or silver, integrated into laminated glass interlayers, allowing for controlled conductor design and application, enabling efficient heating with minimal visual impact and easy fabrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional defrosters use Tungsten or Wolfram wires stitched onto polymer layers, then defrosting functionality is achieved, but manufacturing complexity increases and visual contamination occurs
Solution Approach 1:
The patent replaces the mechanical stitching process with a chemical bonding approach. Conductive polymer layers are laminated between glass layers using heat and pressure, eliminating the need for mechanical wire stitching. This substitution reduces manufacturing complexity while maintaining defrosting functionality through electrical resistance heating of the conductive polymer layers.
Solution Approach 2:
The patent uses composite materials by integrating conductive polymer layers with glass layers to form a laminated composite structure. This composite approach combines the structural integrity of glass with the flexible conductive properties of polymer layers, achieving defrosting functionality without the manufacturing complexity of wire stitching.
2Temperature
If conventional defrosters are used, then heating capability is provided, but visual contamination increases
Solution Approach 1:
The patent uses thin conductive polymer films that can be laminated between glass layers. These thin films provide sufficient electrical resistance for heating while maintaining optical transparency, reducing visual contamination compared to thicker conventional wire or coating-based defrosters.
Solution Approach 2:
The patent optimizes the thickness and conductivity parameters of the polymer layers to achieve the desired balance between heating capability and visual transparency. By adjusting these parameters, the system provides effective defrosting while minimizing visual contamination, allowing light to pass through the laminated glass.
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 solution provides effective defrosting capabilities with improved manufacturing ease and reduced visual contamination, maintaining high light transmission and conductivity, thus enhancing the functionality of laminated glass products.
Implementation Method 1
an electrical potential is applied across the conductor and the resistance to the resultant current produces heat
Data Source
AI summary
The present invention provides interlayers that comprise a polymer film onto which micro lines have been formed from a conductive material. The interlayers comprising such films can be incorporated, for example, into a two glass pane multiple layer glazing. Such glazings can be used, for example, in automobile windscreens or rear window applications or other applications that require a heated glazing panel.