PPS Resin Composition for Electrophotographic Transfer Belt Toughness
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Solution Overview
Problem
Polyphenylene sulfide (PPS) resin lacks sufficient toughness and uniform carbon dispersibility, leading to nonuniform conductivity in electrophotographic transfer belts, which results in image loss and toner scattering.
Innovation Solution
A PPS resin composition with a nylon resin having a χ-parameter of 1.3 or more at 25° C., ensuring compatibility and a single glass transition temperature, allowing for enhanced toughness, heat resistance, and uniform carbon dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If PPS resin is used as a non-reinforced material, then weight is reduced and surface smoothness is improved, but toughness is insufficient
Solution Approach 1:
The invention uses a composite resin system combining PPS resin with a specific elastomer (polyurethane or polybutadiene) to achieve both light weight and superior toughness. The elastomer content is controlled at 5-50 parts by weight per 100 parts of PPS resin, creating a composite material that maintains the light weight advantage while gaining enhanced impact strength and toughness properties.
2Strength
If PPS resin is blended with polyamide resin, then toughness is improved, but phase separation occurs upon cooling
Solution Approach 1:
The invention changes the chemical composition parameter by selecting specific elastomers (polyurethane or polybutadiene) that are compatible with PPS resin across a wide temperature range. This parameter change prevents phase separation upon cooling while maintaining improved toughness, unlike polyamide resin which exhibits incompatibility at lower temperatures.
3Reliability
If carbon is added to PPS resin for electrophotographic transfer belt, then conductivity is achieved, but carbon dispersibility is poor causing nonuniform conductivity
Solution Approach 1:
The invention creates a composite resin system incorporating PPS resin, elastomer, and carbon together. The elastomer component acts as a dispersing medium that facilitates uniform distribution of carbon particles throughout the resin matrix. This composite approach ensures consistent conductivity across the electrophotographic transfer belt while maintaining the necessary electrical properties for image formation.
Data Source
AI summary
A resin composition comprises a polyphenylene sulfide resin and a nylon resin having a χ-parameter of 1.3 or more at 25° C., and has one glass transition temperature, and an image-forming apparatus comprises:a latent-image supporting member, andan intermediate transfer member that supports a toner image transferred thereon from the latent-image supporting member and transfers the supported toner image onto an image-receiving material,wherein the intermediate transfer member comprises a polyphenylene sulfide resin and a nylon resin having a χ-parameter of 1.3 or more at 25° C., and has one glass transition temperature.