Anticorrosive Adhesive Tape Structure for Complex Surface Adhesion
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Solution Overview
Problem
Existing anticorrosive pressure-sensitive adhesive tapes struggle with insufficient adhesion to complex surface shapes, and issues such as wrinkles, lifting, and tearing during application to large areas, particularly in civil engineering and construction applications.
Innovation Solution
The anticorrosive pressure-sensitive adhesive tape is designed with a base material having specific tensile load and tear strength properties, incorporating a pressure-sensitive adhesive layer with sacrificial protective metals like zinc and electroconductive materials like carbon nanotubes, ensuring excellent adhesion and resistance to corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anticorrosive pressure-sensitive adhesive tape containing zinc particles and conductive filler is used to achieve sacrificial protectability, then corrosion prevention capability is improved, but adhesion to complex surface shapes deteriorates and wrinkles or tearing may occur during application
Solution Approach 1:
The invention changes the mechanical parameters of the base material by controlling the difference between tensile load at 2.5% elongation and tensile load at 0.5% elongation to be 1.5 N/mm or more and 6.0 N/mm or less, and setting tear strength to 1.7 N or more. This parameter optimization enables the tape to conform to complex surfaces without wrinkling or tearing while maintaining corrosion prevention capability
Solution Approach 2:
The invention uses a composite base material structure consisting of a resin film with specific mechanical properties. The composite nature of the base material provides both the flexibility needed for complex surface adhesion and the strength needed to prevent tearing during application, while the pressure-sensitive adhesive layer containing zinc particles provides corrosion protection
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 provides enhanced adhesion to complex surfaces, prevents wrinkles and tearing, and maintains adhesive force even under cyclic corrosion and weathering conditions, offering effective corrosion prevention.
Implementation Method 1
an anticorrosive pressure-sensitive adhesive tape comprising a base material and a pressure-sensitive adhesive layer provided on at least one side of the base material
Implementation Method 2
zinc is a metal having a lower potential than that of iron and that zinc thus exhibits the effect of sacrificial protection and has a high anticorrosive property
Implementation Method 3
zinc particles and a conductive filler are contained in a pressure-sensitive adhesive layer, and an electronic circuit is formed between a zinc plate as a base material and oxygen and water, thereby achieving sacrificial protectability
Data Source
AI summary
An anticorrosive pressure-sensitive adhesive tape of the present invention includes a base material and a pressure-sensitive adhesive layer provided on at least one side of the base material, in which the base material has a difference between tensile loads at 2.5% elongation and at 0.5% elongation of 1.5 N/mm or more and 6.0 N/mm or less, and has a tear strength of 1.7 N or more as measured by an Elmendorff tear method in accordance with JIS K7128-2 (1998) without forming a slit. A structure of the present invention includes the anticorrosive pressure-sensitive adhesive tape of the present invention, and an adherend including a metal material or an adherend including concrete, in which the anticorrosive pressure-sensitive adhesive sheet of the present invention is attached to a surface of the adherend.