Toner Binder Resin Amide Ester Ratio Fixing
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Solution Overview
Problem
Existing toners face challenges in achieving low-temperature fixability and preventing hot offset, particularly in the absence of a crystalline polyester resin, which affects their fixability and image formation quality.
Innovation Solution
The development of an electrostatic latent image developing toner with toner particles containing a binder resin that has a specific ratio of amide to ester bonds, as determined by FT-IR analysis, and specific storage elastic moduli at various temperatures, ensuring improved fixability and preventing hot offset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a crystalline polyester resin is used in the toner, then low-temperature fixability is improved, but the toner composition becomes more complex and requires specific components
Solution Approach 1:
The invention changes the chemical composition parameters of the binder resin by incorporating amide bonds with specific ratios (0.00010 ≤ area ratio ≤ 0.02000) and controlling storage elastic modulus at different temperatures. This allows achieving low-temperature fixability without requiring crystalline polyester resin, thus simplifying the toner composition while maintaining performance
Solution Approach 2:
The invention uses a composite binder resin system combining polyester resin with amide-containing compounds, creating a new material composition that achieves the desired thermal properties. The composite structure allows the toner to exhibit appropriate elasticity at fixing temperatures without relying on crystalline polyester resin
2Use of energy by stationary object
If the toner is designed for low-temperature fixing, then energy consumption is reduced, but hot offset resistance may deteriorate
Solution Approach 1:
The invention optimizes the temperature-dependent mechanical properties of the toner by controlling the storage elastic modulus at different temperatures. The binder resin is designed to have G′80 of 3.5×10⁴ to 5.0×10⁴ Pa, G′120 of 1.0×10³ to 1.0×10⁴ Pa, and G′150 of 1.0×10³ to 1.0×10⁴ Pa, creating a specific elasticity profile that enables both low-temperature fixing and hot offset resistance through parameter optimization rather than extreme temperature design
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 toner exhibits enhanced low-temperature fixability and inhibits hot offset, maintaining elasticity and adhesion properties across a wide temperature range, even without a crystalline polyester resin, thereby improving image formation quality.
Implementation Method 1
The toner has a storage elastic modulus at a temperature of 80° C. of at least 3.5×10⁴ Pa and no greater than 5.0×10⁴ Pa. The toner has a storage elastic modulus at a temperature of 120° C. of at least 1.0×10³ Pa and no greater than 1.0×10⁴ Pa. The toner has a storage elastic modulus at a temperature of 150° C. of at least 1.0×10³ Pa and no greater than 1.0×10⁴ Pa.
Implementation Method 2
An area ratio of a peak originated from C═O stretching of the amide bond to a peak originated from C═O stretching of the ester bond is at least 0.00010 and no greater than 0.02000 in a FT-IR spectrum of the toner obtained by Fourier transform infrared spectroscopy analysis.
Data Source
AI summary
An electrostatic latent image developing toner includes a plurality of toner particles containing a binder resin. The binder resin has an amide bond and an ester bond. An area ratio of a peak originated from C═O stretching of the amide bond to a peak originated from C═O stretching of the ester bond is at least 0.00010 and no greater than 0.02000 in a FT-IR spectrum of the toner obtained by Fourier transform infrared spectroscopy analysis. The toner has a storage elastic modulus at 80° C. of at least 3.5×104 Pa and no greater than 5.0×104 Pa. The toner has a storage elastic modulus at 120° C. of at least 1.0×103 Pa and no greater than 10×104 Pa. The toner has a storage elastic modulus at 150° C. of at least 1.0×103 Pa and no greater than 10×104 Pa.