Cold Pressure Fix Toner Composition for Low Energy Fuser Wear
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Solution Overview
Problem
Current cold pressure fix toners face challenges such as high energy requirements, significant fuser wear, and environmental impact, while also needing to achieve effective image fixation and reduced power consumption, especially in xerographic copying and printing systems.
Innovation Solution
A cold pressure fix toner composition comprising a core of a colorant, crystalline co-polyester-co-polydimethylsiloxane resin, and an amorphous resin, encapsulated in a polymer shell, which is prepared through emulsion aggregation and coalescence processes, minimizing energy usage and environmental footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional cold pressure fix toners are used, then image fixation is achieved, but high energy requirements and significant fuser wear occur
Solution Approach 1:
The patent modifies the chemical composition parameters of the toner by incorporating specific polymers (polyester-co-polydimethylsiloxane, polyamide, ethylene-vinyl acetate copolymer) with controlled molecular weights and ratios. This changes the melting and softening characteristics of the toner, enabling it to flow and adhere at lower temperatures, thereby reducing energy consumption and fuser wear while maintaining reliable image fixation.
Solution Approach 2:
The patent employs a composite toner formulation combining multiple polymer materials with complementary properties. The polyester-co-polydimethylsiloxane provides low-temperature flow characteristics, polyamide contributes to adhesion and durability, and ethylene-vinyl acetate copolymer enhances flexibility. This composite approach achieves effective image fixation at reduced temperatures, addressing both energy consumption and fuser wear issues.
2Reliability
If conventional cold pressure fix toners are used, then image fixation is achieved, but environmental impact increases
Solution Approach 1:
The patent adjusts the chemical composition parameters to use environmentally preferable polymer materials with controlled degradation characteristics. The specific ratios of polyester-co-polydimethylsiloxane, polyamide, and ethylene-vinyl acetate copolymer are optimized to achieve effective image fixation while improving biodegradability and reducing persistent environmental contamination from toner particles.
3Reliability
If conventional cold pressure fix toners are used, then image fixation is achieved, but power consumption increases
Solution Approach 1:
The patent modifies the thermal transition parameters of the toner by selecting polymers with specific glass transition temperatures and melting points. The polyester-co-polydimethylsiloxane component provides low-temperature flow properties, reducing the power required by the fuser assembly to achieve adequate toner melting and transfer, while polyamide ensures sufficient adhesion at these reduced temperatures.
Solution Approach 2:
The multi-component composite formulation enables image fixation at lower operating temperatures by combining materials with complementary thermal and adhesive properties. This reduces the power consumption of the fuser system while maintaining reliable image quality through the synergistic effects of the polymer components.
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 solution enables efficient image fixation at low temperatures, reduces fuser wear, and decreases energy consumption, while maintaining excellent adhesion and charging characteristics, thus addressing the limitations of existing toners.
Implementation Method 1
Pressure is applied to the composition, in the form of particles, sufficient to cause at least a portion of the first material to exhibit fluidity at a temperature at which, in the absence of the pressure, the portion of the first material remains solid
Implementation Method 2
a polymer shell thereover
Data Source
Figure 1
AI summary
Disclosed are cold pressure fix toner compositions that include a core of a colorant, and a mixture of a co-polyester-co-polydimethylsiloxane and an amorphous resin, and a polymer shell thereover.