Xerogel Heat Insulating Sheet With Weldable Attachment Regions
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Solution Overview
Problem
Existing heat insulating sheets with silica xerogel have low adhesiveness and are difficult to fix, especially when enlarged, requiring protective sheets and facing challenges in attaching them to casings.
Innovation Solution
A heat insulating sheet configuration with a nonwoven fabric containing a first region with silica xerogel and a second region without, both surfaces covered with protective sheets that are thermally fused together, allowing for easy attachment and sealing to prevent silica xerogel separation and enhance weldability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the size of heat insulating sheet is increased, then heat insulation performance is improved, but attachability deteriorates
Solution Approach 1:
The heat insulating sheet is divided into a first region containing silica xerogel for heat insulation and a second region without silica xerogel for attachment purposes. This segmentation allows different portions of the sheet to serve different functions, enabling large-sized sheets to maintain good attachability through the dedicated second region.
2Reliability
If protective sheets are added to prevent silica xerogel separation, then reliability is improved, but device complexity increases
Solution Approach 1:
The protective sheets are merged with the second region through thermal fusion, creating an integrated structure. This combining approach maintains reliability by preventing silica xerogel separation while avoiding excessive complexity by integrating components rather than adding separate assembly steps.
Solution Approach 2:
Thermal fusion is used to join the protective sheets to the second region, utilizing phase transition (melting and solidification) to create a strong bond. This approach provides reliable attachment and sealing while maintaining manufacturing simplicity through a well-established process.
3Loss of energy
If silica xerogel is used for heat insulation, then heat insulating performance is improved, but adhesiveness deteriorates
Solution Approach 1:
The sheet has different compositions in different regions: the first region contains silica xerogel for optimal heat insulation, while the second region excludes silica xerogel to provide good adhesiveness for attachment. This local quality differentiation allows both heat insulation performance and adhesiveness to be optimized in their respective areas.
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 solution provides a heat insulating sheet that is securely attachable, resistant to external forces, and can be easily welded to casings, ensuring effective heat retention and improved usability.
Implementation Method 1
the protective sheets are mutually joined in a periphery of the heat insulating body
Implementation Method 2
a heat insulating body carrying xerogel in a space inside the nonwoven fabric
Data Source
AI summary
An object is to provide a heat insulating sheet that is easily attachable even if a size is increased, and to provide a method for manufacturing the same. A heat insulating sheet includes nonwoven fabric, and heat insulating body carrying xerogel in a space inside nonwoven fabric. Heat insulating body includes first region carrying the xerogel, and second region not carrying the xerogel and provided inside an outer periphery of heat insulating body. The heat insulating sheet is configured such that each of both surfaces of heat insulating body is provided with protective sheet, and in a periphery of heat insulating body and in second region, protective sheets are mutually joined or protective sheets and second region are joined.