Inkjet Recording Medium Friction Control for Feeding Accuracy
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Solution Overview
Problem
Existing inkjet recording technologies face challenges in small-lot production, particularly for individual camera shops, due to high costs and inefficiencies in printing original logo marks, with issues such as warping, friction coefficient problems, and image quality issues, especially when using inorganic fine particles in ink receiving layers.
Innovation Solution
An inkjet recording medium with both sides coated in resin and ink receiving layers on both surfaces, featuring a static friction coefficient of 0.3 to 0.6 with wear-resistant particles, which allows for accurate sheet feeding and prevents curling and banding, enabling cost-effective printing of logo marks on arbitrary sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inorganic fine particles are used in ink receiving layers to improve image quality, then image quality is improved, but friction coefficient problems occur causing feeding inaccuracies and banding
Solution Approach 1:
The patent changes the particle size parameter of inorganic fine particles in the ink receiving layer to a specific range (0.1-10 μm, preferably 0.5-5 μm) to optimize both image quality and friction characteristics. This parameter optimization resolves the contradiction by finding the optimal particle size that provides sufficient image quality while maintaining appropriate friction coefficient (0.3-0.7) for reliable feeding without banding
Solution Approach 2:
The patent uses composite materials by combining inorganic fine particles with specific organic resins and additives in the ink receiving layer formulation. This composite approach allows tuning of both optical properties (for image quality) and surface friction properties (for feeding reliability), resolving the contradiction between image quality and feeding accuracy
2Stability of the object's composition
If resin coating is applied to both sides of the substrate to prevent curling, then curling is prevented, but friction coefficient increases causing feeding problems
Solution Approach 1:
The patent optimizes the thickness parameter of the resin coating layer to a specific range (5-50 μm, preferably 10-30 μm) to balance curling prevention and friction control. This parameter optimization ensures sufficient curling resistance while maintaining friction coefficient within the acceptable range for reliable feeding
Solution Approach 2:
The patent applies different resin compositions or surface treatments to different areas of the recording medium, particularly optimizing the surface properties of the ink receiving layer to have appropriate friction characteristics while the bulk resin coating provides curling resistance. This local quality differentiation resolves the contradiction between overall stability and surface feeding properties
3Adaptability or versatility
If small-lot production is implemented for individual camera shops to print original logo marks, then business customization is enabled, but production cost increases
Solution Approach 1:
The patent designs the inkjet recording medium with universal properties that work effectively for both small-lot customized production and larger production runs. The optimized resin coating and inorganic fine particle formulation provide consistent performance across different production volumes, enabling camera shops to economically produce customized logo marks without prohibitive cost increases
Solution Approach 2:
The patent incorporates pre-optimized resin coatings and inorganic fine particle formulations during manufacturing that are specifically designed to work well with inkjet printing of logo marks and customized images. This preliminary optimization of the recording medium structure enables cost-effective small-lot production by reducing the need for additional processing steps or corrections
4Strength
If wear-resistant particles are adhered to metal rollers to improve durability, then roller durability is improved, but friction coefficient becomes problematic affecting sheet feeding
Solution Approach 1:
The patent optimizes the surface properties of the inkjet recording medium to have a friction coefficient range (0.3-0.7) that is compatible with metal rollers having wear-resistant particles. By controlling the resin coating composition and inorganic fine particle characteristics, the patent ensures appropriate friction for reliable sheet feeding while allowing the use of durable wear-resistant roller coatings
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 ensures high accuracy in feeding and prevents offset or curling during printing, making it suitable for small-lot production and cost-effective for individual camera shops to print original brand logo marks or campaign-specific marks.
Implementation Method 1
ink receiving layers provided on both sides of the resin coated sheet as outermost layers
Implementation Method 2
a static friction coefficient between at least one of the ink receiving layers and a metal roller onto which wear-resistant particles are adhered is from 0.3 to 0.6
Data Source
AI summary
An inkjet recording medium comprising a resin coated sheet formed from a base paper having both sides coated with a resin, and ink receiving layers provided on both sides of the resin coated sheet as outermost layers, wherein a static friction coefficient between at least one of the ink receiving layers and a metal roller onto which wear-resistant particles are adhered is from 0.3 to 0.6.