Electroconductive Endless Belt with Composite Resin Substrate
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Solution Overview
Problem
Electroconductive endless belts used in image-forming apparatuses require flexibility, anti-setting properties, high mechanical strength, and consistent electrical conductivity while maintaining high glossiness, which existing technologies fail to achieve effectively.
Innovation Solution
The electroconductive endless belt is composed of a substrate with a thermoplastic polyalkylene naphthalate resin and a combination of amorphous and crystalline thermoplastic resins having ester bonds, along with a conductive filler, specifically carbon black, to enhance flexibility, anti-setting properties, and electrical conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thermoplastic polyalkylene naphthalate resin is used as the substrate material, then mechanical strength and dimensional stability are improved, but flexibility and anti-setting properties deteriorate
Solution Approach 1:
The patent uses a composite material system consisting of thermoplastic polyalkylene naphthalate resin combined with specific plasticizers and lubricants. This composite approach allows the substrate to simultaneously achieve high mechanical strength from the polyalkylene naphthalate resin and improved flexibility/anti-setting properties from the plasticizer-lubricant combination, resolving the contradiction between strength and flexibility.
2Illumination intensity
If the belt structure is optimized for high glossiness, then surface appearance is improved, but electrical conductivity consistency deteriorates
Solution Approach 1:
The patent optimizes specific parameter ranges including plasticizer content (5-50 parts by weight per 100 parts resin), lubricant content (1-30 parts by weight per 100 parts resin), and belt thickness (0.05-0.5 mm) to simultaneously achieve high glossiness and consistent electrical conductivity. This parameter optimization allows the surface to be highly reflective while maintaining stable electrical properties through controlled material composition.
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 provides an electroconductive endless belt that withstands repeated continuous operation, maintains consistent glossiness, and ensures high electrical conductivity, addressing the limitations of existing belts in terms of durability and performance.
Implementation Method 1
The electroconductive endless belt is composed of a substrate with a thermoplastic polyalkylene naphthalate resin and a combination of amorphous and crystalline thermoplastic resins having ester bonds, along with a conductive filler, specifically carbon black, to enhance flexibility, anti-setting properties, and electrical conductivity.
Implementation Method 2
The electroconductive endless belt is composed of a substrate with a thermoplastic polyalkylene naphthalate resin and a combination of amorphous and crystalline thermoplastic resins having ester bonds
Data Source
AI summary
An electroconductive endless belt can withstand repeated continuous operation, in particular has anti-setting properties, and has consistent gloss and electrical conductivity. An image-forming apparatus including the electroconductive endless belt is also provided. The electroconductive endless belt contains a substrate and a conductive filler. The substrate contains a thermoplastic polyalkylene naphthalate resin and at least two types of thermoplastic resins having an ester bond other than the thermoplastic polyalkylene naphthalate resin. The weight ratio of the thermoplastic polyalkylene naphthalate resin to the at least two types of thermoplastic resins having an ester bond is in the range of 95:5 to 55:45. The at least two types of thermoplastic resins having an ester bond contains at least one amorphous thermoplastic resin and at least one crystalline thermoplastic resin.