Heat Insulating Sheet With Resin Protrusions
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Solution Overview
Problem
Existing heat insulating materials face challenges in achieving weight reduction while maintaining required insulation properties, particularly when alternately stacking metal vapor-deposited sheets and nets, as they tend to increase weight and decrease insulation efficiency due to metal-to-metal contact and inadequate thermal conduction suppression.
Innovation Solution
A heat insulating sheet comprising a thermal conduction suppressing layer, a radiant heat reflecting layer, and protruding portions with resin on their surface, which are formed by depositing resin on the surface of the thermal conduction suppressing layer and radiant heat reflecting layer, and through-holes that prevent metal vapor-deposited sheets from contacting each other, thereby reducing thermal conduction and enhancing insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If metal vapor-deposited sheets and nets are alternately stacked to form heat insulating material, then insulation structure is formed, but weight increases and insulation efficiency decreases due to metal-to-metal contact
Solution Approach 1:
A resin layer is introduced as an intermediary substance between the metal vapor-deposited sheet and the net layer. This resin layer prevents direct metal-to-metal contact, thereby maintaining insulation efficiency while allowing the use of lighter materials. The resin acts as a thermal barrier that bridges the two layers without creating a thermal bridge through direct metal contact.
Solution Approach 2:
The invention changes the physical and chemical parameters of the interface between layers by using a resin material with specific thermal conductivity properties. The resin layer's thermal conductivity is controlled to be lower than direct metal contact, thereby reducing thermal conduction while maintaining structural integrity. This parameter change allows weight reduction without sacrificing insulation performance.
2Stability of the object's composition
If metal vapor-deposited sheets and nets are alternately stacked, then layered structure is formed, but thermal conduction increases due to direct contact between layers
Solution Approach 1:
The resin layer serves as a thermal intermediary that maintains the layered structure while blocking thermal conduction paths. It physically separates the metal vapor-deposited sheet from the net, preventing direct thermal contact while preserving the alternating layer configuration necessary for insulation functionality.
Solution Approach 2:
The invention creates a composite material structure where the resin layer is combined with the metal vapor-deposited sheet and net layer. This composite approach allows each material to contribute its optimal properties: the metal layers provide radiant heat reflection, the net provides structural support, and the resin provides thermal isolation, together achieving both structural stability and reduced thermal conduction.
3Reliability
If protruding portions with resin are formed on the surface, then metal-to-metal contact is prevented, but manufacturing complexity increases
Solution Approach 1:
The formation of protruding portions with resin is merged with the existing lamination process. The resin is applied and shaped during the same manufacturing step where layers are stacked and bonded, rather than being added as a separate post-processing step. This integration reduces manufacturing complexity while achieving the contact prevention function.
Solution Approach 2:
The resin material itself performs multiple functions: it acts as the bonding agent between layers, provides the protruding portions that prevent metal contact, and serves as the thermal barrier. This self-service approach eliminates the need for separate components or processes to achieve contact prevention, thereby reducing manufacturing complexity.
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 effectively reduces weight and maintains or improves insulation efficiency by preventing metal vapor-deposited sheets from contacting each other, thereby suppressing thermal conduction and enhancing the insulation properties of the heat insulating material.
Implementation Method 1
a first radiant heat reflecting layer that is placed on one surface side of the first thermal conduction suppressing layer and reflects radiant heat
Implementation Method 2
a first thermal conduction suppressing layer that suppresses thermal conduction
Data Source
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AI summary
It has been difficult to achieve weight reduction while satisfying a required insulation property in a heat insulating material configured by alternately stacking a metal vapor-deposited sheet and a net. A heat insulating sheet comprises: a first thermal conduction suppressing layer that suppresses thermal conduction; a first radiant heat reflecting layer that is placed on one surface side of the first thermal conduction suppressing layer and reflects radiant heat; and a protruding portion protruding from a surface of the first radiant heat reflecting layer on an opposite side of a surface on which the first thermal conduction suppressing layer is stacked, the protruding portion containing a resin at least on its surface.