Colorless Transparent Toner with Urethane Bonds for Fixing Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current toners with crystalline resin for image forming face challenges in balancing low temperature fixability and high temperature stability, often resulting in poor offset resistance and peeling issues due to uneven crystallization, which affects image quality and durability.
Innovation Solution
Development of a colorless transparent toner with a binder resin containing a crystalline resin having a urethane bond and/or a urea bond, optimized to achieve a softening point to maximum peak temperature ratio of 0.8 to 1.55, ensuring strong attachment to substrates and improved viscoelasticity for balanced fixability and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a crystalline resin is used for low-temperature fixing, then the fixing temperature is reduced, but the attachment strength to substrate weakens due to crystallization
Solution Approach 1:
The patent changes the chemical composition parameters of the crystalline resin by introducing urethane bonds and/or urea bonds into the polymer structure. This chemical modification allows the resin to maintain crystallinity for low-temperature fixing while the specific chemical bonds provide enhanced adhesion to substrates, resolving the contradiction between low fixing temperature and strong attachment.
Solution Approach 2:
The patent creates a composite binder resin system combining crystalline resin with specific chemical functional groups (urethane/urea bonds). This composite material approach integrates the low-temperature fixing property of crystalline structure with the high adhesion property of urethane/urea bonded polymers, achieving both requirements simultaneously.
2Productivity
If the toner is fixed onto substrate, then the image is formed, but the toner layer peels off after image formation due to crystallization progression
Solution Approach 1:
The patent modifies the chemical structure parameters of the crystalline resin by incorporating urethane and/or urea bonds. These chemical modifications maintain the crystallinity needed for image formation while the specific chemical bonding characteristics prevent peeling and enhance long-term durability, resolving the contradiction between productivity and reliability.
3Stability of the object's composition
If colorless transparent toner is applied to reduce uneven gloss, then the gloss uniformity is improved, but the offset resistance and abrasion resistance must be balanced
Solution Approach 1:
The patent changes the chemical composition of the binder resin to include crystalline resin with urethane/urea bonds. This composition modification provides the right balance between gloss uniformity (through controlled crystallization) and surface durability (through strong chemical bonding), resolving the contradiction between aesthetic quality and functional reliability.
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 achieves a good combination of low temperature fixability and high temperature stability, enhancing image durability and reducing peeling issues while maintaining uniform gloss and offset resistance.
Implementation Method 1
the toner described therein must strike a balance between offset resistance and abrasion resistance. In particular, when the toner using a crystalline resin is fixed onto a substrate like paper, the attachment of the toner to the paper weakens as crystallization progresses
Implementation Method 2
optimized to achieve a softening point to maximum peak temperature ratio of 0.8 to 1.55, ensuring strong attachment to substrates and improved viscoelasticity for balanced fixability and stability
Data Source
AI summary
A colorless transparent toner containing a crystalline resin having a urethane bond and/or a urea bond.