Thermal Insulation Sheet Using Expandable Hollow Particles
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Solution Overview
Problem
Existing thermal insulation materials for non-volatile memories deteriorate in high-temperature environments due to shrinkage of organic hollow particles, leading to a loss of thermal insulation properties.
Innovation Solution
A sheet comprising a thermal insulation layer containing both thermally expandable organic hollow particles and organic hollow particles with different expansion properties, along with a matrix polymer, to maintain insulation by compensating for shrinkage with expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic hollow particles are used in the thermal insulation layer, then thermal insulation properties are improved, but the particles shrink at high temperatures causing deterioration of thermal insulation properties
Solution Approach 1:
The patent applies preliminary anti-action by incorporating thermally expandable hollow particles that expand when heated to counteract the shrinkage of non-expandable organic hollow particles. This pre-planned compensatory mechanism activates during the reflow process to maintain overall volume stability and prevent deterioration of thermal insulation properties despite the shrinkage of some particles.
Solution Approach 2:
The patent uses a composite material system consisting of two types of hollow particles with opposite thermal responses: non-expandable organic hollow particles that provide baseline insulation and thermally expandable hollow particles that expand at high temperatures. This composite approach creates a synergistic effect where the expansion of one component compensates for the shrinkage of the other, maintaining stable thermal insulation properties throughout the temperature cycle.
2Reliability
If thermally expandable organic hollow particles are added to compensate for shrinkage, then thermal insulation properties are maintained, but the composition of the thermal insulation layer becomes more complex
Solution Approach 1:
The patent applies parameter changes by carefully controlling the ratio of thermally expandable to non-expandable hollow particles within specific ranges (expandable particles: 1-50 wt%, preferably 5-30 wt%). This quantitative parameter optimization balances the competing requirements of maintaining thermal insulation properties while limiting compositional complexity. The specific ratio ensures sufficient expansion capability to counteract shrinkage without over-complicating the material formulation.
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 sheet effectively suppresses deterioration of thermal insulation properties in high-temperature environments by utilizing thermally expandable particles to counteract shrinkage, ensuring consistent insulation performance.
Implementation Method 1
first hollow particles being thermally expandable organic hollow particles
Data Source
AI summary
A sheet including a thermal insulation layer and an adhesive layer, in which the thermal insulation layer contains first hollow particles being thermally expandable organic hollow particles, second hollow particles being organic hollow particles other than the first hollow particles, and a matrix polymer.