Wire Assembly Resin Interface for Waterproof Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wire assemblies face challenges in achieving sufficient waterproof performance between the resin molded member and the resin coating, due to varying affinities between different resin grades, molecular weights, and additive ratios.
Innovation Solution
A wire assembly design where the adhesion work between the resin molded member and the resin coating is set to 45 mJ/m2 or more, ensuring firm adhesion and maintaining satisfactory waterproofness. This is achieved by controlling the surface free energy and adhesion properties of both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different resin grades, molecular weights, and additive ratios are used for the resin molded member and resin coating, then material selection flexibility is improved, but adhesion between the resin molded member and resin coating deteriorates
Solution Approach 1:
The patent applies parameter changes by establishing specific ranges for surface free energy (30-40 mJ/m2 for resin coating, 35-45 mJ/m2 for resin molded member) and adhesion work (45 mJ/m2 or more) to ensure reliable adhesion. This allows flexible material selection within defined parameters while maintaining consistent adhesion performance across different resin grades and compositions.
2Reliability
If adhesion between resin molded member and resin coating is strengthened, then waterproof performance is improved, but material selection becomes more restricted
Solution Approach 1:
The patent defines specific parameter ranges for surface free energy and adhesion work that ensure waterproof performance (adhesion work ≥45 mJ/m2) while allowing material flexibility. By establishing these quantitative guidelines, the invention enables selection from various resin grades and compositions without compromising adhesion or waterproofing.
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 wire assembly demonstrates excellent waterproof performance, with leak pressures exceeding 30 kPa and up to 50 kPa in certain cases, indicating robust adhesion and resistance to moisture intrusion.
Implementation Method 1
a value of an adhesion work obtained from a surface free energy of the resin molded member and a surface free energy of the resin coating being 45 mJ/m2 or more
Data Source
AI summary
A wire assembly includes a wire including a conductor and a resin coating, an end member connected to the conductor at an end part of the wire, and a resin molded member for covering a region from the end member to the resin coating. A value of an adhesion work obtained from a surface free energy of the resin molded member and a surface free energy of the resin coating is 45 mJ/m2 or more.