Magnetic Recording Medium High-Temperature Stability
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Solution Overview
Problem
Magnetic recording tapes face challenges in maintaining travelling stability and preservation stability, especially in high-temperature environments, due to shape deformation and increased friction.
Innovation Solution
A magnetic recording medium with specific properties, including an average loss elastic modulus of 0.06 GPa or less, an average storage elastic modulus of 6 GPa or less, and an average Tanδ value of 0.017 or less, is developed. Additionally, the medium has a base layer thickness of 4.5 μm or less and a total thickness of 5.3 μm or less, which enhances its stability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic recording medium is preserved in a high-temperature environment, then the preservation stability deteriorates due to shape deformation, but the travelling stability also deteriorates due to increased friction
Solution Approach 1:
The patent applies parameter changes by precisely controlling the loss elastic modulus (E'') to be 0.06 GPa or less and the storage elastic modulus (E') to be 6 GPa or less in the temperature range of 60°C to 65°C. This parameter optimization enables the magnetic recording medium to maintain shape stability and reduce friction in high-temperature environments, thereby improving both preservation stability and travelling stability simultaneously
2Reliability
If the base layer thickness is reduced to enhance stability, then the manufacturing precision becomes more challenging, but the travelling stability improves
Solution Approach 1:
The patent specifies that the base layer thickness should be 4.5 μm or less and the total medium thickness should be 5.3 μm or less. By defining these precise parameter ranges, the patent achieves both improved travelling stability through reduced thickness and acceptable manufacturing precision through clear specification guidelines
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 magnetic recording medium exhibits improved preservation stability and travelling stability in high-temperature environments, while also enhancing electromagnetic conversion characteristics.
Implementation Method 1
an average value A(E'') of loss elastic moduli E'' in a temperature range of 60° C. to 65° C. when dynamic mechanical analysis is performed on the magnetic recording medium at a frequency of 10 Hz and a heating rate of 2° C./min is 0.06 GPa or less, and an average value A(E') of storage elastic moduli E' in a temperature range of 60° C. to 65° C. when the dynamic mechanical analysis is performed may be 6 GPa or less
Implementation Method 2
an average value A(Tanδ) of Tanδs (loss elastic modulus E''/storage elastic modulus E') in a temperature range of 60° C. to 65° C. when the dynamic mechanical analysis is performed may be 0.017 or less
Data Source
AI summary
An object of the present technology is to provide a magnetic recording medium that has excellent travelling stability even when preserved in a high-temperature environment.The present technology provides a magnetic recording medium, in which an average value A(E″) of loss elastic moduli E″ in a temperature range of 60° C. to 65° C. when dynamic mechanical analysis is performed on the magnetic recording medium at a frequency of 10 Hz and a heating rate of 2° C./min is 0.06 GPa or less, and an average height Rpk of protruding peaks measured using a non-contact profilometer using optical interference is 2.4 nm or less.