Vitamin E Release Fluid for Oxidation-Resistant Fuser Rolls
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Solution Overview
Problem
Existing release fluids in electrostatographic machines suffer from oxidative degradation, leading to toner contamination and fuser roll failure, which reduces the lifespan of fuser rolls and results in print defects.
Innovation Solution
A release fluid formulation comprising vitamin E, an amino functional silicone fluid, and a non-functional silicone fluid is used to prevent oxidative degradation of the fuser roll's outer layer, enhancing its longevity and preventing toner adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antioxidants are added to release fluids to prevent oxidative degradation, then the stability and lifespan of the fuser roll is improved, but most conventional antioxidants are toxic and not approved for human contact applications
Solution Approach 1:
The patent changes the chemical parameters of the antioxidant by selecting vitamin E (tocopherol), which has different chemical properties compared to conventional antioxidants like BHT. This parameter change allows the antioxidant to provide the same protective function against oxidative degradation while being non-toxic and safe for human contact applications.
Solution Approach 2:
The patent uses vitamin E, a naturally occurring antioxidant that is biodegradable and safe for disposal, replacing persistent toxic antioxidants. This approach allows the release fluid to be replaced periodically without environmental or health concerns, effectively managing the toxicity issue through controlled replacement.
2Object-affected harmful factors
If common food approved additives like BHT and vitamin C are used as antioxidants, then safety for human contact is improved, but these additives are solids not soluble in silicone oil and not stable at fusing temperatures
Solution Approach 1:
The patent changes the physical state parameter from solid (BHT, vitamin C) to liquid form by using vitamin E in its oil-soluble form. This parameter change enables solubility in silicone oil while maintaining safety. Additionally, the specific selection of tocopherol variants with appropriate molecular weights ensures stability at fusing temperatures up to 200°C.
Solution Approach 2:
The patent creates a composite antioxidant system by combining vitamin E with the silicone oil base, forming a homogeneous liquid solution. This composite approach ensures both solubility and thermal stability, as the vitamin E molecules are distributed throughout the silicone oil matrix, allowing them to function effectively at elevated temperatures.
3Reliability
If the temperature of the substrate is increased above 250° C. to improve toner fusion, then the fusing effectiveness is improved, but the substrate may discolor or scorch or ignite
Solution Approach 1:
The patent introduces vitamin E antioxidant as an intermediary substance between the heat source and the substrate. This antioxidant protects the substrate and release fluid from oxidative degradation caused by high temperatures, enabling effective toner fusion at elevated temperatures while preventing substrate damage through chemical protection.
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 formulation stabilizes the fuser roll under high temperatures, extending its lifespan and maintaining print quality by reducing oxidative degradation and toner contamination.
Implementation Method 1
Several antioxidants can be added to release fluids to prevent or mitigate degradation e.g. typical motor oil has several antioxidants to improve oil stability and engine parts oxidation/corrosion
Implementation Method 2
a release fluid including an amino functional silicone fluid, a non-functional silicone fluid, and vitamin E
Implementation Method 3
In order to fix or fuse the toner onto a support member permanently by heat, it is necessary to elevate the temperature of the toner to a point at which the constituents of the toner coalesce and become tacky
Data Source
AI summary
Disclosed herein is a release fluid, a fuser member and an image forming apparatus. The release fluid includes an amino functional silicone fluid, a non-functional silicone fluid; and vitamin E.