Core-shell resin particle for low-temperature fixability and thermal stability
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Solution Overview
Problem
Toners face challenges in achieving both low temperature fixability and high temperature storage stability, with existing solutions often compromising one for the other, and there is a need for environmentally friendly options that reduce resource depletion and energy consumption.
Innovation Solution
A resin particle with a core-shell structure containing biomass-derived and recycled materials, such as polyethylene terephthalate and polybutylene terephthalate, is developed, which enhances low temperature fixability while maintaining high temperature storage stability through a specific composition and molecular weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If biomass-derived resin is used to enhance low temperature fixability, then low temperature fixability is improved, but high temperature storage stability deteriorates
Solution Approach 1:
The patent uses a composite resin system combining amorphous resin with crystalline resin containing biomass-derived resin (30-70 wt%). This composite structure allows the amorphous resin to provide low temperature fixability while the crystalline resin maintains high temperature storage stability, resolving the contradiction between these two opposing requirements.
Solution Approach 2:
The patent creates a core-shell structure where the core contains crystalline resin for thermal stability and the shell contains amorphous resin for low temperature processability. This local differentiation of material properties allows simultaneous achievement of both low temperature fixability and high temperature storage stability.
2Object-generated harmful factors
If recycled PET and PBT are used to reduce environmental burden, then environmental friendliness is improved, but toner performance may deteriorate
Solution Approach 1:
The patent carefully controls the molecular weight distribution and composition ratio of recycled PET and PBT within specific ranges (30-70 wt% biomass-derived resin, specific molecular weight distributions). By optimizing these parameters, the patent maintains toner performance while maximizing environmental friendliness through recycling.
Data Source
AI summary
A resin particle contains an amorphous resin, a crystalline resin C containing a biomass-derived resin, and at least one of polyethylene terephthalate or polybutylene terephthalate, wherein the resin particle has a core-shell structure comprising a core resin and a shell resin, the core resin comprises the crystalline resin C, and the proportion of the total mass of the biomass-derived resin, the polyethylene terephthalate, and the polybutylene terephthalate to the resin particle at 100 percent by mass is 30 or more percent by mass.