Deinking UV Prints with Rotary Disintegrator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge lies in efficiently preparing high-quality deinked pulp from hard-to-deink waste paper stocks, such as those with UV prints, which often result in impaired production processes and degraded recycled paper quality due to the difficulty in sorting and processing these materials.
Innovation Solution
A mechanical process using a rotary disintegrator is applied to disintegrate and deink waste paper slurry, effectively removing inks and preparing deinked pulp without the need for excessive mechanical load or chemical usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional deinking methods are used on UV prints, then the process can handle standard printed materials, but UV prints cannot be effectively deinked and must be eliminated as prohibitive materials
Solution Approach 1:
The invention changes the chemical parameters of the deinking system by introducing a specific anionic surfactant (alkyl polyglucoside) that can effectively interact with UV-curable ink residues. This chemical parameter change enables the deinking process to handle UV prints that were previously impossible to process, thereby improving adaptability while maintaining productivity
Solution Approach 2:
The invention uses a composite deinking system combining anionic surfactant (alkyl polyglucoside) with existing deinking agents. This composite approach creates a synergistic effect that enhances the ability to remove UV print residues while maintaining overall process efficiency, resolving the contradiction between handling new material types and maintaining productivity
2Productivity
If high mechanical load is applied to waste paper stocks containing UV prints, then deinking can be achieved, but fiber degradation occurs
Solution Approach 1:
The invention replaces part of the mechanical deinking action with chemical action using anionic surfactants. The alkyl polyglucoside surfactant chemically interacts with and emulsifies UV ink residues, allowing effective deinking to occur with reduced mechanical stress on the paper fibers, thus maintaining fiber integrity while achieving productivity goals
Solution Approach 2:
The invention changes the chemical environment parameters by adding specific surfactants that reduce the surface tension and improve wetting of ink particles. This parameter change allows ink removal through chemical emulsification rather than purely mechanical force, protecting fiber strength while maintaining deinking effectiveness
3Adaptability or versatility
If a lot of chemicals are used to deink UV prints, then deinking can be achieved, but costs increase
Solution Approach 1:
The invention optimizes the chemical parameters by selecting anionic surfactants with specific properties (alkyl polyglucosides) that are highly effective at low concentrations. This targeted parameter change allows effective UV print deinking with minimized chemical quantities, improving adaptability while controlling substance consumption and associated costs
Solution Approach 2:
The anionic surfactant acts as an intermediary substance that facilitates the removal of UV ink residues through its amphiphilic structure. This intermediary mechanism is highly efficient, allowing effective deinking with small amounts of chemical added to the pulper, thereby achieving adaptability to UV prints without excessive chemical consumption
4Adaptability or versatility
If UV prints are mixed in waste paper stocks, then resource conservation is improved, but runnability of production process is impaired
Solution Approach 1:
The invention changes the chemical composition parameters of the pulping system by adding anionic surfactants that specifically target UV-curable ink residues. This parameter change enables the reliable processing of waste paper stocks containing UV prints by preventing the runnability issues that would otherwise occur, thereby improving recyclability while maintaining production reliability
Solution Approach 2:
The anionic surfactant serves as an intermediary that mediates between the UV ink residues and the water in the pulper. This intermediary action prevents the formation of problematic aggregates or deposits that would impair runnability, allowing UV-printed waste paper to be reliably processed while improving overall recyclability
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
This method allows for the efficient deinking of hard-to-recycle printed materials, producing high-quality deinked pulp that can be used as a resource, reducing fiber damage and operational costs while improving the quality of recycled paper.
Implementation Method 1
applying a mechanical process to the waste paper slurry using a rotary disintegrator
Data Source
AI summary
The present invention aims to develop a technique for efficiently preparing deinked pulp from prints made with UV-curable inks. According to the processes for preparing deinked pulp of the present invention, high quality deinked pulp can be obtained by performing the steps of: disintegrating printed waste paper containing UV prints in water to give a waste paper slurry; and applying a mechanical process to the waste paper slurry using a rotary disintegrator.