Toner Composition for Heat-Resistant Storage and Low-Temperature Fixability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Toner materials face challenges in achieving excellent pulverizability, low-temperature fixability, and heat-resistant storage stability, particularly in high-temperature environments, where issues like blocking and durability are critical, especially in continuous duplex printing processes.
Innovation Solution
A toner composition incorporating a non-crystalline polyester resin with alkylene oxide adducts of bisphenol A and ethylene glycol, combined with crystalline polyester resin and hydrocarbon wax, along with an aromatic petroleum resin, optimizing the mass ratios and molecular weights to enhance heat resistance and fixability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional toner materials are used to achieve good pulverizability, then energy consumption increases and volatile components are released, but heat-resistant storage stability and low-temperature fixability deteriorate
Solution Approach 1:
The patent employs a composite binder resin system comprising multiple resin components (carboxyl-containing resin, hydroxyl-containing resin, and ester-containing resin) in specific weight ratios. This composite material approach allows the toner to achieve both excellent pulverizability through controlled molecular structure and superior heat-resistant storage stability through the synergistic effects of different resin components with complementary properties.
Solution Approach 2:
The patent optimizes specific parameters including the weight ratios of different resin components, carboxyl group content (0.01-0.5 mmol/g), hydroxyl group content (0.01-0.5 mmol/g), and molecular weight distribution. By precisely controlling these parameters, the toner achieves improved pulverizability while maintaining heat-resistant storage stability, resolving the contradiction between ease of manufacture and reliability.
2Use of energy by stationary object
If toner is designed for low-temperature fixability, then volatile components are reduced and energy is saved, but durability in actual machines and heat-resistant storage stability worsen
Solution Approach 1:
The patent uses a composite resin system with carboxyl-containing resin, hydroxyl-containing resin, and ester-containing resin in specific combinations. This composite structure enables low-temperature fixability through controlled melting behavior while simultaneously providing durability through the robust molecular architecture and intermolecular interactions of the multiple resin components.
Solution Approach 2:
The patent controls the glass transition temperature and melting point through precise adjustment of resin composition ratios and molecular weight parameters. The carboxyl group content and hydroxyl group content are optimized to achieve low-temperature fixability while the ester-containing resin component ensures durability, resolving the contradiction between energy efficiency and reliability.
3Temperature
If high-temperature resistance is improved for storage stability, then blocking is prevented, but low-temperature fixability and pulverizability worsen
Solution Approach 1:
The patent employs a multi-component resin system where the carboxyl-containing resin provides heat-resistant storage stability through strong intermolecular forces, while the ester-containing resin ensures good pulverizability through appropriate molecular weight and chain flexibility. The synergistic combination of these components resolves the contradiction between temperature resistance and ease of manufacture.
Solution Approach 2:
The patent optimizes the molecular weight distribution and functional group content to achieve the desired balance. The carboxyl group content (0.01-0.5 mmol/g) and ester-containing resin weight ratio are specifically controlled to ensure heat-resistant storage stability while maintaining excellent pulverizability, resolving the contradiction between temperature resistance and manufacturing ease.
4Productivity
If continuous duplex printing is performed in high-temperature environment, then productivity increases, but blocking occurs and image quality deteriorates
Solution Approach 1:
The patent uses a composite resin system with specific weight ratios of carboxyl-containing resin, hydroxyl-containing resin, and ester-containing resin that provides exceptional thermal stability. This composite material structure prevents blocking during continuous duplex printing by maintaining toner particle integrity and preventing aggregation even in high-temperature environments, thus enabling high productivity without image quality deterioration.
Solution Approach 2:
The patent controls the carboxyl group content, hydroxyl group content, and molecular weight parameters to achieve optimal thermal behavior. These parameter optimizations ensure the toner maintains its physical properties during continuous high-temperature printing operations, preventing blocking and maintaining image quality while sustaining high productivity.
Data Source
AI summary
A toner including a non-crystalline polyester resin, a crystalline polyester resin, a hydrocarbon wax, and an aromatic petroleum resin is provided. A mass ratio of the aromatic petroleum resin to the hydrocarbon wax is 1.0 or more. The non-crystalline polyester resin contains diol components, and the diol components include an alkylene oxide adduct of bisphenol A and ethylene glycol.