Conductive Roller Laminate with Ethylene Oxide Resin Layers
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Solution Overview
Problem
Conventional conductive rollers using UV curable resins face issues with hardness increase, leading to insufficient softness and adhesiveness between layers, which affects pressing contact with other members.
Innovation Solution
A laminate structure with at least two energy ray curable resin layers, where the first layer contains an energy ray curable resin with an ethylene oxide skeleton and the second layer contains a hydrocarbon ring skeleton, enhancing adhesiveness and softness through specific resin compositions and curing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a UV curable resin is used in the surface of a conductive roller, then toner filming is suppressed, but cure shrinkage occurs leading to deterioration of adhesiveness between layers
Solution Approach 1:
The patent changes the chemical composition parameters of the UV curable resin by incorporating specific components (urethane acrylate oligomer with weight average molecular weight of 6,000 or more and acryloylmorpholine) to reduce cure shrinkage while maintaining toner filming suppression
Solution Approach 2:
The patent uses a composite resin composition containing multiple components including urethane acrylate oligomer, acryloylmorpholine, and other UV curable resins to achieve both low shrinkage and good adhesiveness properties that single materials cannot provide
2Reliability
If acryloylmorpholine is used to improve adhesiveness, then adhesiveness between layers improves, but hardness of the resin increases and softness is insufficient
Solution Approach 1:
The patent carefully controls the concentration parameters of acryloylmorpholine and balances it with other softening components to achieve optimal adhesiveness while preventing excessive hardness increase
Solution Approach 2:
The patent creates different functional zones within the resin composition - acryloylmorpholine provides adhesiveness in the bonding interface while other components maintain overall softness in the bulk material
3Strength
If the resin hardness is increased to improve strength, then resistance to deformation improves, but softness decreases and pressing contact ability deteriorates
Solution Approach 1:
The patent adjusts the molecular weight parameters and chemical composition of the resin to achieve an optimal balance where the material has sufficient strength resistance while maintaining low enough hardness for good pressing contact
Solution Approach 2:
The patent creates a homogeneous resin composition where strength and softness properties are uniformly distributed, allowing the material to exhibit both resistance to deformation and good pressing contact ability simultaneously
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 laminate achieves improved adhesiveness and softness, enabling sufficient pressing contact with other members, while maintaining desirable properties for conductive rollers.
Implementation Method 1
a first resin composition used in formation of the energy ray curable resin layer (1) contains an energy ray curable resin (A) having an ethylene oxide skeleton having two or more ethylene oxide repeating units
Data Source
Figure 1~2
AI summary
This disclosure is to provide a laminate with improved adhesiveness between the layers and excellent softness, and a conductive roller which enables sufficient pressing contact when pressed to other members. The laminate of this disclosure is a laminate comprising at least 2 or more energy ray curable resin layers formed by curing a resin composition with an energy ray, wherein: the laminate has an energy ray curable resin layer (1) and an energy ray curable resin layer (2); and a first resin composition used in formation of the energy ray curable resin layer (1) contains an energy ray curable resin (A) having an ethylene oxide skeleton having two or more ethylene oxide repeating units.