Pressure-sensitive adhesive tape, article, and method for dismantling article
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for detaching pressure-sensitive adhesive tapes often cause thermal damage to adherends due to external heating, and they may emit volatile organic compounds, posing environmental and safety risks.
Innovation Solution
A pressure-sensitive adhesive tape with a melt-softening layer containing a thermoplastic resin and tackifying resin, configured to be thermally detached within a short period without external heat, using a heating element to generate heat internally and minimize volatile organic compound emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external heating is applied to detach the pressure-sensitive adhesive tape, then the tape can be separated from adherends, but thermal damage may occur to the adherend
Solution Approach 1:
A heating element is embedded within the pressure-sensitive adhesive tape structure, positioned between the adhesive layer and the release liner. This internal heating element serves as an intermediary that generates heat directly at the detachment interface, enabling controlled thermal release without requiring external heating sources that could damage the adherend.
Solution Approach 2:
The pressure-sensitive adhesive tape incorporates its own heating element and control circuitry, allowing it to self-generate the necessary heat for detachment. When activated, the heating element raises the temperature of the adhesive layer to facilitate release, enabling the tape to perform its own detachment function without external intervention.
2Productivity
If sufficient heat is generated to detach the tape, then separation is achieved, but volatile organic compounds may be emitted causing environmental harm
Solution Approach 1:
The heating element is designed to operate within a specific temperature range (typically 60-100°C) that is sufficient to reduce the viscosity of the pressure-sensitive adhesive and enable detachment, but below the threshold that would cause decomposition or emission of volatile organic compounds. This controlled parameter change achieves detachment while minimizing environmental harm.
3Duration of action of moving object
If the adhesive layer is heated to melt for detachment, then the tape can be removed, but the heating process may cause thermal deterioration of the adherend
Solution Approach 1:
The heating element is positioned to heat only the adhesive layer and immediate surrounding areas, creating a localized thermal zone. This localized heating melts or softens the adhesive at the detachment interface while the heat does not propagate to the adherend, enabling rapid detachment without thermal deterioration of the adherend.
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 tape allows for easy detachment of adherends while preventing thermal damage and reducing environmental impact, facilitating recycling and reuse of components.
Implementation Method 1
a heating element, and a melt-softening layer which is adjacent to the heating element at least in this order
Implementation Method 2
a melt-softening layer which contains a thermoplastic resin having a weight average molecular weight of 80,000 to 150,000
Data Source
AI summary
[Object] To provide a pressure-sensitive adhesive tape that has a low volatile component content, has reduced adverse effects on the external environment, can be thermally detached within a short period of time and can prevent thermal damage to the adherend, and allows for easy thermal detachment procedures; an article in which at least two adherends are bonded via the pressure-sensitive adhesive tape; and a method for dismantling the article.[Solution] A pressure-sensitive adhesive tape including a pressure-sensitive adhesive layer, a heating element, and a melt-softening layer that is adjacent to the heating element at least in this order, in which the melt-softening layer contains a thermoplastic resin having a weight average molecular weight of 80,000 to 150,000 and a tackifying resin having a mass loss rate of 3% or less when heating from 25° C. to 200° C. at a temperature raising rate of 10° C./min in nitrogen.