Multilayer Adhesive Tape Low Temperature Interface Separation
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Solution Overview
Problem
Conventional multilayer adhesive tapes experience interface separation between layers in extreme low temperature or fluctuating temperature environments, leading to performance deterioration and failure in maintaining adhesion.
Innovation Solution
A multilayer adhesive tape structure comprising a first outer adhesive layer, an intermediate adhesive layer, and a second outer adhesive layer, where the layers are treated with liquefied nitrogen for 15 seconds to maintain interlayer attachment force, preventing interface separation and enhancing durability and reworkability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional adhesive tape is used in extreme low temperature environments, then adhesion performance is maintained at normal temperatures, but interface separation occurs between layers in extreme low temperature or fluctuating temperature environments
Solution Approach 1:
The adhesive tape is divided into multiple layers (first outer adhesive layer, intermediate adhesive layer, second outer adhesive layer) with each layer having different glass transition temperatures. This segmentation allows each layer to contribute differently to the overall performance, with the intermediate layer preventing interface separation while outer layers maintain adhesion.
Solution Approach 2:
The patent changes the physical and chemical parameters of the adhesive layers by controlling their glass transition temperatures within specific ranges. The intermediate adhesive layer has a glass transition temperature of -50°C to -10°C, while outer layers have -60°C to -20°C, creating parameter differentiation that resolves the contradiction between adhesion and interface stability.
2Reliability
If adhesive tape durability is improved for high temperature fluctuation, then adhesion performance is enhanced, but reworkability may be compromised when removal is needed for reconstruction
Solution Approach 1:
The adhesive tape utilizes the dynamic property of glass transition temperature to achieve different performance states. At service temperatures, the adhesive remains flexible and durable. During removal, heating above the glass transition temperature makes the adhesive more pliable, enabling clean removal and reworkability without compromising earlier durability.
3Reliability
If multilayer adhesive tape structure is implemented to prevent interface separation, then reliability in extreme temperatures is improved, but device complexity increases
Solution Approach 1:
Different regions (layers) of the adhesive tape are assigned different qualities based on their glass transition temperatures. The intermediate layer has higher glass transition temperature for interface stability, while outer layers have lower glass transition temperatures for adhesion. This local differentiation achieves high reliability without requiring complex overall structure.
Data Source
AI summary
A multilayer adhesive tape in which an interface separation between layers does not occur even at in extremely low temperature atmosphere is provided. The multilayer adhesive tape sequentially includes: a first outer adhesive layer; an intermediate adhesive layer; and a second outer adhesive layer, in which attaching force among the first outer adhesive layer, the intermediate adhesive layer, and the second outer adhesive layer is maintained after the multilayer adhesive tape is treated in liquefied nitrogen for 15 seconds.