Fixing Member Surface Friction and Roughness Control
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Solution Overview
Problem
Conventional fixing members face issues with foreign substances adhering to their surfaces, leading to damage and unintentional separation due to lateral displacement in a joined state, as increased adhesiveness to prevent displacement also attracts unwanted materials.
Innovation Solution
A fixing member with a surface coefficient of kinetic friction of 1.50 or less, arithmetic mean roughness Ra of 5.00 μm or less, and a shear stress of 100.00 N or more during self-attachment, formed from a resin composition containing a silicone-based surface modifier, effectively reduces foreign substance adhesion and prevents lateral displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the adhesiveness between fixing members is increased to prevent lateral displacement, then the stability of the joined state is improved, but foreign substances tend to adhere to the surfaces of the fixing members
Solution Approach 1:
The invention changes the surface parameters of the fixing member by controlling the coefficient of kinetic friction to be 1.50 or less and the arithmetic mean roughness Ra to be 5.00 μm or less. This parameter optimization allows the surface to have reduced foreign substance adhesion while maintaining sufficient shear stress (100.00 N or more) to prevent lateral displacement, thus resolving the contradiction between stability and foreign substance resistance.
Solution Approach 2:
The fixing member is constructed as a composite structure comprising a substrate and a surface layer with specifically controlled friction and roughness characteristics. This composite design enables the surface layer to resist foreign substance adhesion while the overall structure maintains the necessary shear stress for joint stability, addressing both conflicting requirements simultaneously.
2Object-affected harmful factors
If the surface roughness is increased to prevent foreign substance adhesion, then the resistance to foreign substances is improved, but the shear stress during self-attachment decreases
Solution Approach 1:
The invention optimizes the surface roughness parameter (Ra ≤ 5.00 μm) to find the optimal balance point where foreign substance adhesion is sufficiently reduced while maintaining adequate shear stress (≥ 100.00 N) for self-attachment. This precise parameter control resolves the contradiction between foreign substance resistance and attachment strength.
3Object-affected harmful factors
If the coefficient of kinetic friction is increased to prevent foreign substance adhesion, then the resistance to foreign substances is improved, but the lateral displacement prevention capability decreases
Solution Approach 1:
The invention sets the coefficient of kinetic friction at 1.50 or less to achieve optimal performance where foreign substance adhesion is reduced while maintaining sufficient lateral displacement prevention capability through adequate shear stress (100.00 N or more). This parameter optimization resolves the contradiction between foreign substance resistance and lateral stability.
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 described fixing member effectively suppresses foreign substance adhesion and prevents lateral displacement when attached, maintaining the integrity of the joined state.
Implementation Method 1
a coefficient of kinetic friction of 1.50 or less
Implementation Method 2
an arithmetic mean roughness Ra of 5.00 μm or less
Implementation Method 3
a shear stress during self-attachment of 100.00 N or more
Data Source
AI summary
Disclosed is a fixing member in which adhesion of foreign substances to its surface is suppressed, and which hardly causes lateral displacement when such fixing members are attached together to form a joined state. The fixing member disclosed herein includes a surface having a coefficient of kinetic friction of 1.50 or less, an arithmetic mean roughness Ra of 5.00 μm or less, and a shear stress at the time of self-attachment of 100.00 N or more.