Stretchable Adhesive Tape for Easy Re-Peeling in Tight Spaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing adhesive tapes require significant labor to peel off due to high adhesive strength, making recycling or reuse difficult, and existing solutions fail to provide effective re-peelability, especially in confined spaces of electronic equipment.
Innovation Solution
An adhesive tape with a substrate layer having a breaking stress of 1 to 100 MPa and elongation at break of 400% to 3000%, and an adhesive layer satisfying the relational expression P400/P0 ≤ 0.9, which includes components like styrene block copolymers and silicone fillers to enhance re-peelability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive tape has high adhesive strength for reliable bonding, then adhesion reliability is improved, but peeling operation requires considerable labor and repeelability deteriorates
Solution Approach 1:
The patent changes the physical parameters of the adhesive layer by controlling its thickness (1 to 10 μm) and elastic modulus (10^6 to 10^8 Pa) to achieve optimal balance between adhesion strength and peeling ease. This parameter optimization allows the adhesive to maintain strong bonding during use while enabling easy peeling for recycling without requiring excessive force or labor.
Solution Approach 2:
The patent uses a composite structure combining a substrate layer with an adhesive layer having specific mechanical properties. The substrate provides structural support while the adhesive layer with controlled elastic modulus and thickness provides both strong bonding and easy peeling characteristics, creating a composite material system that resolves the contradiction between adhesion reliability and peeling ease.
2Ease of operation
If adhesive tape is stretched at 90 degrees during re-peeling, then peeling force is applied, but the tape adheres again to the adherend due to touching, preventing re-peeling
Solution Approach 1:
The patent changes the elastic modulus parameter of the adhesive layer to a specific range (10^6 to 10^8 Pa) that prevents re-adhesion during re-peeling operations. This parameter control ensures that when the tape is stretched and peeled, it does not adhere again to the adherend surface, maintaining repeelability throughout multiple peeling cycles.
Solution Approach 2:
The patent applies dynamic peeling by stretching the adhesive tape in the longitudinal direction during peeling operations. This dynamic approach, combined with the controlled elastic modulus, prevents the adhesive from re-adhering to the adherend surface during the peeling process, enabling successful re-peeling operations.
3Adaptability or versatility
If adhesive tape is used in narrow spaces between members, then it can bond components in confined areas, but it becomes difficult to stretch and peel in a direction parallel to the bonding surface
Solution Approach 1:
The patent optimizes the adhesive layer thickness to 1 to 10 μm and elastic modulus to 10^6 to 10^8 Pa, which allows the tape to be easily stretched and peeled even in narrow spaces between members. These parameter adjustments reduce the force and space required for peeling operations while maintaining bonding effectiveness in confined areas.
4Strength
If substrate layer has high breaking stress for strength, then tape strength is improved, but elongation at break decreases, reducing ability to stretch without breakage
Solution Approach 1:
The patent optimizes the substrate layer breaking stress to 1 to 100 MPa and elongation at break to 400% to 3000%, creating a balanced material property profile. This parameter optimization ensures the substrate has sufficient strength for bonding applications while maintaining high elongation capability to allow stretching during peeling operations without breakage.
Solution Approach 2:
The patent creates a composite structure where the substrate layer and adhesive layer work together with complementary properties. The substrate provides strength and elongation, while the adhesive layer provides bonding and peeling characteristics, forming a composite system that achieves both high strength and stretchability without breakage.
Data Source
AI summary
An adhesive tape with high repeelability from the state that a portion of the adhesive tape has already been peeled from an adherend is provided. The adhesive tape includes a substrate layer and an adhesive layer. The substrate layer has a breaking stress in a range of 1 to 90 MPa and an elongation at break in a range of 400% to 3000%. The adhesive tape satisfies the following relational expression (i): [Math. 1] P400/P0≤0.9 (i). P0 denotes an initial cleavage strength N/cm2 of the adhesive tape, and P400 denotes a cleavage strength N/cm2 when the adhesive tape is stretched by 400%.