Perfluoropolyether Lubricant Adhesion to Magnetic Disk
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Solution Overview
Problem
Conventional techniques fail to achieve effective adhesion of the lubricant layer with the magnetic disk, particularly with the protective layer, leading to issues during high-speed rotation.
Innovation Solution
A perfluoropolyether compound with a specific structure, where two perfluoropolyethers are bonded through an aliphatic ether including a carbon atom with a primary alcohol, enhancing adhesion between the magnetic disk and the protective layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional perfluoropolyether compounds are used as lubricant, then the lubricant layer can be formed on the protective layer, but the adhesion between the lubricant layer and the magnetic disk (particularly the protective layer) is insufficient
Solution Approach 1:
The patent modifies the chemical structure parameters of the perfluoropolyether compound by introducing a specific aliphatic ether linkage with a primary alcohol group. This structural parameter change enhances the adhesion between the lubricant layer and the protective layer, resolving the contradiction between reliability and ease of manufacture.
Solution Approach 2:
The patent creates a composite molecular structure by bonding two perfluoropolyether chains through an aliphatic ether linkage. This composite structure combines the lubrication properties of perfluoropolyethers with the adhesion-enhancing properties of the aliphatic ether-Primary alcohol group, achieving both good lubrication performance and strong adhesion.
2Productivity
If the magnetic disk rotates at high speed, then data processing efficiency is improved, but the lubricant layer loses contact with the magnetic disk surface
Solution Approach 1:
The patent changes the molecular structure parameters of the lubricant compound by introducing an aliphatic ether linkage with a primary alcohol group. This structural modification enhances the adhesive forces between the lubricant layer and the magnetic disk surface, enabling the lubricant to maintain contact even during high-speed rotation and thus supporting improved data processing efficiency.
3Reliability
If the lubricant layer is made to adhere strongly to the protective layer, then adhesion is improved, but the lubrication performance may be compromised
Solution Approach 1:
The patent designs a composite molecular structure that integrates both adhesive and lubricative functionalities. The aliphatic ether linkage provides adhesion to the protective layer, while the perfluoropolyether chains maintain low friction and wear properties, thus achieving strong adhesion without compromising lubrication performance.
Solution Approach 2:
The patent applies local quality by having different parts of the molecule serve different functions: the aliphatic ether-Primary alcohol group provides adhesion at the interface with the protective layer, while the perfluoropolyether chains provide lubrication at the sliding interface, achieving both adhesion and low friction simultaneously.
Data Source
AI summary
Provided is a compound with which a lubricant having excellent adhesion to a magnetic disk, particularly to a protective layer can be provided. A perfluoropolyether compound in accordance with one aspect of this invention has a structure in which two perfluoropolyethers are bonded to each other through an aliphatic ether, the aliphatic ether including a carbon atom to which a primary alcohol is bonded.