Active Energy Ray-Curable Adhesive Tape for Peelable Bonding
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Solution Overview
Problem
Existing adhesive tapes used for joining or labeling in industrial applications are difficult to peel off due to strong adhesion, making recycling and reuse of products challenging, and their multi-layer structure increases production costs while limiting adhesive strength.
Innovation Solution
An easily peelable adhesive tape with an active energy ray-curable layer on its surface, having a storage modulus of less than 1.0×10^6 Pa at 25°C, which cures upon irradiation to enhance peelability without compromising adhesive strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive tapes are used to strongly fix components or labels in industrial applications, then adhesion reliability is improved, but peeling difficulty increases making recycling and reuse challenging
Solution Approach 1:
The patent applies preliminary action by incorporating a photodegradable polymer into the adhesive layer that decomposes upon irradiation with active energy rays (such as UV light). This preliminary chemical modification enables the adhesive to lose its bonding capability on demand, allowing components to be strongly fixed during use and then easily peeled for recycling when irradiated, thus resolving the contradiction between strong adhesion and easy peeling
Solution Approach 2:
The patent changes the chemical composition parameter of the adhesive by using a photodegradable polymer that undergoes decomposition when exposed to active energy rays. This parameter change transforms the adhesive from a permanent bonding state to a removable state, enabling both strong initial adhesion for reliability and easy subsequent peeling for recycling purposes
2Ease of operation
If adhesive tapes have multi-layer structure to enable easy peeling, then peeling ease is improved, but production cost increases
Solution Approach 1:
The patent extracts the peeling function from a separate multi-layer structure and integrates it directly into the adhesive layer itself by incorporating photodegradable polymers. This eliminates the need for additional release layers or complex multi-layer constructions, achieving easy peeling through a single-layer adhesive that decomposes upon irradiation, thereby reducing production costs while maintaining peeling ease
Solution Approach 2:
The adhesive layer serves multiple functions simultaneously: it provides strong adhesion during use, contains the photodegradable polymer for on-demand decomposition, and enables easy peeling after irradiation. This multi-functionality eliminates the need for separate functional layers, simplifying the structure and reducing manufacturing costs while achieving easy peeling
3Ease of operation
If adhesive tapes use weak adhesive layer for easy disassembling, then peeling ease is improved, but adhesive strength decreases limiting fixation capability
Solution Approach 1:
The patent applies dynamics by making the adhesive strength可调 (adjustable) through time and irradiation conditions. The adhesive maintains strong bonding strength during the service period, then transitions to weak bonding strength after irradiation with active energy rays. This dynamic change in adhesive properties allows the same adhesive layer to provide both strong fixation capability and easy peeling ease at different stages
Solution Approach 2:
The patent changes the adhesive strength parameter through photodegradation. The photodegradable polymer maintains intact molecular structure and strong adhesive properties during use, but upon irradiation with active energy rays, the polymer decomposes and the adhesive strength dramatically decreases, enabling easy peeling. This parameter change resolves the contradiction between maintaining strong adhesive strength and achieving easy peeling
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 maintains strong adhesion to adherends and can be easily peeled off after irradiation, reducing detachment issues and production costs while maintaining effective adhesive strength.
Implementation Method 1
an active energy ray-curable layer which has a storage modulus (G′a25) of less than 1.0×10^6 Pa as measured at a temperature of 25° C. and a frequency of 1.0 Hz and has an adhesive layer on a surface side of the active energy ray-curable layer
Data Source
AI summary
[Object] An object of the present invention is to provide an easily peelable adhesive tape that has a good peel adhesive strength when attached to an adherend and that can be easily peeled after being irradiated with active energy rays.[Solution] The present invention is directed to an easily peelable adhesive tape that has, on at least one surface of a base material, an active energy ray-curable layer having a storage modulus (G′a25) of less than 1.0×106 Pa as measured at a temperature of 25° C. and a frequency of 1.0 Hz and has an adhesive layer on the surface side of the active energy ray-curable layer.