Double-Sided Adhesive Tape Viscosity Control for Oiled Surfaces
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Solution Overview
Problem
Conventional double-sided adhesive tapes fail to ensure sufficient adhesiveness on surfaces with oil present, requiring cleaning and surface treatment, and often struggle with releasing the release paper.
Innovation Solution
A double-sided adhesive tape with a thermosetting resin layer containing rubber-modified epoxy resin and a latent curing agent, having a flowtester viscosity of 1000 Pa·s or more and 7000 Pa·s or less, which includes a substrate with a thickness of 25 μm or more, such as glass fiber cloth, to ensure adhesiveness and easy release paper removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional film adhesive is used, then handling and adhesiveness are improved, but adhesiveness fails to ensure on oiled surfaces
Solution Approach 1:
The patent changes the viscosity parameter of the adhesive composition to 1000-7000 Pa·s at 40°C, which optimizes the adhesive's ability to penetrate and bond with oiled surfaces. This specific viscosity range allows the adhesive to maintain sufficient cohesion while still adhering to contaminated surfaces without requiring pre-cleaning.
Solution Approach 2:
The patent uses a composite adhesive material consisting of epoxy resin, rubber-modified epoxy resin, and latent curing catalyst. This composite formulation combines the bonding capabilities of epoxy with the flexibility and adhesion enhancement provided by rubber modification, enabling reliable bonding on oiled surfaces.
2Reliability
If cleaning and surface treatment are performed, then adhesiveness is ensured, but working becomes complicated
Solution Approach 1:
The adhesive composition is formulated to self-adjust and bond effectively on oiled surfaces without requiring external cleaning or surface treatment. The specific viscosity and composite composition enable the adhesive to penetrate and adhere to the oil-containing surface directly, making the adhesive system self-sufficient and eliminating the need for additional preparation steps.
3Ease of manufacture
If release paper is laminated on adhesive, then bonding is enabled, but releasing becomes difficult
Solution Approach 1:
The patent optimizes the viscosity parameter (1000-7000 Pa·s) to ensure proper flow and bonding characteristics while maintaining adequate release paper removal. This viscosity range provides sufficient adhesion strength for bonding but not so much that the release paper becomes difficult to separate from the adhesive layer.
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 achieves sufficient adhesiveness on oiled surfaces without pre-cleaning and facilitates easy release paper peeling, enhancing workability and adhesiveness while maintaining structural integrity.
Implementation Method 1
the thermosetting resin layer has a flowtester viscosity at 40° C. and under a load of 20 Kg of 1000 Pa·s or more and 7000 Pa·s or less
Implementation Method 2
the thermosetting resin layer contains a rubber-modified epoxy resin and a latent curing agent
Data Source
AI summary
A double-sided adhesive tape includes a substrate, and a thermosetting resin layer laminated on both sides of the substrate. The thermosetting resin layer contains a rubber-modified epoxy resin and a latent curing agent. The thermosetting resin layer has a flowtester viscosity at 40° C. and under a load of 20 Kg of 1000 Pa·s or more and 7000 Pa·s or less.