Sheet Processing Device with Refining Prevention Agent
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Solution Overview
Problem
Existing sheet processing technologies fail to effectively remove color materials like toner or ink from used paper, leading to incomplete recycling and visible residues, which affects the quality of recycled paper.
Innovation Solution
A sheet processing device equipped with a detector to identify printed areas and a refining prevention agent applicator that applies a hydrophilic refining prevention agent to prevent over-refinement, ensuring that printed areas remain unrefined while unprinted areas are refined, thereby improving the separation of materials and whiteness of recycled sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a refining device is used to process recycled paper, then the unprinted areas are effectively refined and separated, but the printed areas undergo over-refinement causing color material to remain visible and reducing whiteness
Solution Approach 1:
The patent applies a refining prevention agent selectively to printed areas of the paper, creating different refinement characteristics in different regions. The agent forms a protective coating on printed portions that prevents over-refinement and color material transfer, while unprinted areas undergo normal refinement for effective separation.
2Measurement precision
If the sheet is paused for detection and agent application, then printing area identification and selective treatment are achieved, but processing efficiency decreases
Solution Approach 1:
The patent implements continuous conveyance of the paper sheet through the processing system without pausing. The detection device identifies printed areas and the refining prevention agent applicator applies the agent simultaneously during continuous movement, eliminating idle time and maintaining high processing efficiency while achieving precise selective treatment.
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 effectively removes color materials from printed areas, preventing over-refinement and enhancing the whiteness and quality of recycled sheets by ensuring that printed areas are not over-processed, thus improving the separation of refined and unrefined materials.
Implementation Method 1
a detector configured to detect any printed parts of the sheet
Implementation Method 2
the refining prevention agent applicator ejects a liquid containing the refining prevention agent to the printed area
Implementation Method 3
the refining prevention agent is hydrophilic. This configuration improves binding between the refining prevention agent and fiber when the sheet contains cellulosic fiber
Data Source
AI summary
A sheet processing device, a sheet manufacturing apparatus, and a sheet processing method enable effectively removing the color material of printed parts. A sheet processing device for processing a printed sheets has a detector configured to detect the printed parts of the sheet; and a refining prevention agent applicator configured to selectively apply a refining prevention agent that prevents refinement of the sheet to a printed area including the printed parts detected by the detector.