Paper Feed Roll Resin Layer Abrasion Resistance
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Solution Overview
Problem
Paper feed rolls with silicone rubber outer layers suffer from low abrasion resistance, leading to deformation and reduced ability to convey paper effectively over time.
Innovation Solution
A roll with a resin layer containing sulfur atoms, carbon chains, and urethane bonds, applied as a cylindrical foamed resin layer to enhance abrasion resistance and friction coefficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If silicone rubber is used as the outer layer material of the paper feed roll, then contamination to the image forming apparatus is reduced, but abrasion resistance becomes low
Solution Approach 1:
The patent applies composite materials by combining silicone rubber with a resin layer containing sulfur atoms, carbon chains, and urethane bonds. This composite structure allows the roll to simultaneously achieve the low contamination property of silicone rubber and the high abrasion resistance of the sulfur-containing resin layer, resolving the contradiction between these two properties.
Solution Approach 2:
The patent changes the chemical composition parameters of the outer layer by introducing a resin layer with specific molecular structures (sulfur atoms, carbon chains, urethane bonds) over the silicone rubber base. This parameter change enables the outer layer to maintain the beneficial low contamination property while gaining enhanced abrasion resistance through the cross-linked resin structure.
2Ease of operation
If the outer layer is made soft to increase contact area and friction coefficient, then paper conveyance ability is improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent applies local quality by creating a two-layer structure where the inner silicone rubber layer provides softness for increased contact area and friction, while the outer resin layer provides abrasion resistance. Each layer performs its specific function locally, allowing the roll to simultaneously achieve good paper conveyance and high abrasion resistance.
Solution Approach 2:
The composite material structure combines the soft, high-friction silicone rubber base with a harder, abrasion-resistant resin coating. This composite approach allows the roll to exhibit both the softness needed for effective paper conveyance and the hardness needed for durability against wear.
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 a paper feed roll with improved abrasion resistance and a large friction coefficient, ensuring effective paper conveyance and preventing malfunction in image forming apparatuses.
Implementation Method 1
A high friction coefficient is required for the paper feed roll. The friction coefficient becomes lager as the contact area when the paper feed roll comes into contact with the paper is greater.
Implementation Method 2
a paper feed roll having an outer layer of silicone rubber has a problem of low abrasion resistance. When the paper feed roll continues to be used, the outer layer with low abrasion resistance gradually is abraded.
Data Source
AI summary
A roll excellent in abrasion resistance, which contains: a resin layer containing a first atom group having a plurality of sulfur atoms, a plurality of second atom groups having a carbon chain that has a plurality of carbon atoms arranged in a line and has an end bonded to any one of the plurality of sulfur atoms, and a plurality of third atom groups each of which has a urethane bond and is bonded to any one of the plurality of second atom groups; and a cylindrical foamed resin having an outer surface covered with the resin layer.