Waste Paper Recycling Liquid Ejection for Custom Whiteness
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Solution Overview
Problem
Existing waste paper recycling techniques face challenges in achieving consistent paper quality, particularly in terms of whiteness and print quality, as they require manual adjustment and cannot efficiently produce papers with varying properties on demand.
Innovation Solution
A waste paper recycling apparatus and method that utilize a liquid ejection device to selectively apply different liquids containing binders and pigments to specific regions of a sheet, allowing for controlled paper formation with varying properties, such as whiteness and image quality, by aligning nozzle holes to intersect the transport direction and using a control system to manage the application of these liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a pigment is used to increase the degree of whiteness in recycled paper, then the whiteness is improved, but the device complexity increases due to the need for liquid ejection devices and control systems
Solution Approach 1:
The patent applies local quality by selectively applying pigment-containing liquid to specific regions of the sheet rather than uniformly treating the entire sheet. The liquid ejection device deposits pigment only where needed to achieve desired whiteness levels, while other regions can have different properties. This allows different regions to have different whiteness degrees based on local requirements.
Solution Approach 2:
The patent changes parameters by controlling the composition and concentration of liquids applied to different regions. By adjusting the pigment concentration in the liquid and controlling the ejection parameters, the system can achieve varying degrees of whiteness across different regions of the same sheet, thereby improving whiteness through parameter optimization.
2Adaptability or versatility
If paper quality is changed between regions to meet user requests, then the adaptability is improved, but the manufacturing precision becomes more difficult to maintain
Solution Approach 1:
The patent implements local quality by enabling different regions of the sheet to receive different liquid compositions with varying binder and pigment ratios. This allows each region to be customized for specific quality requirements (e.g., different whiteness, strength, or printability) while maintaining overall manufacturing precision through controlled liquid deposition.
Solution Approach 2:
The patent applies universality by designing a single liquid ejection system that can handle multiple liquid types and compositions. The system can switch between different liquids (first liquid with binder, second liquid with pigment and binder, third liquid with different pigment) to produce sheets with varied properties, making the manufacturing process versatile while maintaining precision.
3Productivity
If multiple liquids with different compositions are applied to achieve varied paper properties, then the productivity is improved through automated liquid ejection, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a single liquid ejection device capable of handling multiple liquid types (first liquid with binder, second liquid with pigment and binder, third liquid with different pigment). This multi-functional device can switch between different liquids to produce sheets with varied properties, improving productivity while consolidating equipment rather than requiring separate devices for each liquid type.
Solution Approach 2:
The patent implements self-service through the automated liquid ejection system that automatically selects and applies the appropriate liquid composition to different regions based on predetermined patterns or control signals. This automation reduces manual intervention and increases productivity, allowing the system to serve itself in managing complex liquid application processes.
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
Enables the production of papers with consistent and varied properties, such as different whiteness levels and image qualities, efficiently addressing the need for customized paper products by improving infiltration and binding of fibers, thus enhancing paper strength and productivity.
Implementation Method 1
a liquid ejection device which receives a first liquid and a second liquid different from the first liquid... a control portion which controls the liquid ejection device to adhere the liquid selected by the selection operation to the predetermined region
Implementation Method 2
the first liquid contains a binder which binds fibers together, and the second liquid contains a pigment and a binder which binds fibers together
Data Source
AI summary
A waste paper recycling apparatus includes a liquid ejection device which receives a first liquid and a second liquid different from the first liquid; a receiving portion receiving a selection operation which selects one of the first liquid and the second liquid which is adhered to a predetermined region of a sheet containing fibers formed from waste paper; and a control portion which controls the liquid ejection device to adhere the liquid selected by the selection operation to the predetermined region. In the waste paper recycling apparatus, the first liquid contains a binder which binds fibers together, and the second liquid contains a pigment and a binder which binds fibers together.