Adhesive Coating Composition for Electrical Steel Sheet Laminates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical steel sheet laminates require conventional fastening methods like welding, cramping, or interlocking, which can compromise the magnetic properties of the steel sheets.
Innovation Solution
An electrical steel sheet laminate with a fusion layer formed using an adhesive coating composition that enhances adhesive strength between steel sheets without relying on conventional fastening methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional fastening methods (welding, cramping, interlocking) are used to adhere electrical steel sheets, then adhesive strength is achieved, but magnetic properties are compromised
Solution Approach 1:
The patent replaces mechanical fastening methods (welding, cramping, interlocking) with a chemical bonding system using an adhesive coating composition. The coating contains reactive groups that form chemical bonds with the electrical steel sheets, providing adhesion without mechanical intervention that would damage magnetic properties.
Solution Approach 2:
The adhesive coating composition acts as an intermediary layer between electrical steel sheets. This intermediate layer provides the bonding function while isolating the steel sheets from direct mechanical or thermal contact that would compromise their magnetic characteristics.
2Reliability
If insulating coating film is applied to suppress eddy current, then electrical properties are improved, but adhesion between sheets deteriorates
Solution Approach 1:
The adhesive coating composition is formulated as a composite material containing both insulating components (to maintain electrical properties and suppress eddy currents) and adhesive components (with reactive groups for strong bonding). This composite structure simultaneously provides both required functions.
Solution Approach 2:
The coating is designed with local quality differentiation: it provides insulating properties at the interface with the steel sheets to suppress eddy currents, while simultaneously providing adhesive properties through reactive groups that bond to the sheet surfaces. Different regions of the coating perform different functions.
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 solution improves adhesive strength and maintains the magnetic properties of the electrical steel sheet laminate, offering better magnetism and adhesion at high temperatures.
Implementation Method 1
a fusion layer which is formed by thermal fusion of the adhesive coating layer
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An adhesive coating composition according to one embodiment of the present invention comprises 100 parts by weight of polyethylene acrylate including a repeating unit represented by a following formula (1) and a repeating unit represented by a following formula (2), and 3 to 25 parts by weight of inorganic particles, wherein the polyethylene acrylate contains 75 to 95% by weight of the repeating unit represented by the following formula (1), and 5 to 25% by weight of the repeating unit represented by the following formula (2).