Photocurable Repeelable Adhesive Tape for Strong Bond and Clean Peel
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Solution Overview
Problem
Conventional acrylic foam-type adhesive tapes exhibit high bonding strength, making them difficult to separate and disassemble, and photocurable tapes lack easy peelability due to surface wettability issues.
Innovation Solution
A repeelable adhesive is developed using a photocurable adhesive composition comprising an acrylic copolymer, photocurable acrylate monomer, photocurable urethane acrylate oligomer, crosslinking agent, and photoinitiator, combined with a heat foaming agent, which is cured by UV irradiation and heated to foam, allowing easy peeling without residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional acrylic foam-type adhesive tapes are used to achieve high bonding strength, then adhesion reliability is improved, but the bonding portions become difficult to separate and disassemble
Solution Approach 1:
The invention changes the physical and chemical parameters of the adhesive by incorporating a heat-responsive component that alters the adhesive's properties at different temperatures. At room temperature, the adhesive maintains strong bonding, but when heated to a specific transition temperature, the adhesive softens and becomes easily peelable, thus resolving the contradiction between strong adhesion and easy removal
Solution Approach 2:
The adhesive composition is designed to dynamically change its properties based on temperature conditions. The heat-responsive component enables the adhesive to transition from a rigid, high-strength state during bonding to a soft, easily removable state during separation, making the adhesive's behavior adaptive to different operational phases
2Loss of substance
If photocurable adhesive tapes are used to eliminate adhesion by UV irradiation, then adhesive transfer is reduced, but the tapes are not easily peeled off due to base layer wettability
Solution Approach 1:
The invention introduces temperature as a controlling parameter alongside UV irradiation. The heat-responsive component remains dormant during UV curing but activates upon heating, fundamentally changing the adhesive's physical state and enabling easy peeling without adhesive transfer, thus resolving the contradiction between preventing adhesive transfer and enabling easy removal
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 adhesive maintains strong initial adhesion but can be easily peeled off after UV curing and heating, ensuring no adhesive transfer or residue on the adherend.
Implementation Method 1
a repeelable adhesive including: a photocurable adhesive prepared by polymerizing a photocurable adhesive composition including an acrylic copolymer, a photocurable acrylate-based monomer, a photocurable urethane acrylate-based oligomer, a crosslinking agent, and a photoinitiator
Implementation Method 2
a heat foaming agent... after photocuring is performed with primary UV irradiation, foaming is performed by secondary heating
Data Source
AI summary
A repeelable adhesive including a photocurable adhesive and a heat foaming agent and a repeelable adhesive tape including the repeelable adhesive are disclosed. The repeelable adhesive maintains excellent adhesion, but easily peels off from an adherend after ultraviolet (UV) irradiation and heating.