Conifer Pulp Fiber Beating and Ozone Treatment
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Solution Overview
Problem
Conifer-derived pulp fibers used in paper production often result in a rough surface and reduced tensile strength due to their longer fiber length and width compared to hardwood-derived pulp fibers, making it difficult to form uniform paper sheets.
Innovation Solution
A method involving a beating step to shorten conifer-derived pulp fibers and an ozone treatment to oxidatively decompose and remove impurities, followed by maintaining the fibers in a wet state to enhance fibrillation and surface area, resulting in improved paper quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conifer-derived pulp fibers are used for paper production, then the fiber length and fiber width are increased, but the surface uniformity and tensile strength are reduced
Solution Approach 1:
The patent applies segmentation by dividing the long conifer fibers into shorter segments through mechanical beating and ozone-induced fragmentation. This reduces the average fiber length from several millimeters to shorter lengths, enabling better formation of uniform paper sheets while maintaining the beneficial properties of conifer fibers.
Solution Approach 2:
The patent changes the physical and chemical parameters of conifer fibers through ozone treatment, which modifies fiber surface properties, reduces fiber width, and alters fiber flexibility. These parameter changes enable conifer fibers to behave more like hardwood fibers in terms of paper formation quality.
2Length of moving object
If conifer-derived pulp fibers are used for paper production, then the fiber length is increased, but the tensile strength is reduced
Solution Approach 1:
The patent applies parameter changes by using ozone treatment to modify the chemical composition and physical structure of conifer fibers. This includes oxidizing lignin components, reducing fiber wall thickness, and improving fiber-to-fiber bonding characteristics, which collectively enhance tensile strength despite the inherent length disadvantages of conifer fibers.
Solution Approach 2:
The patent employs ozone, a strong oxidant, to accelerate the oxidation of conifer fiber components. This oxidative treatment modifies the fiber structure by breaking down lignin, hemicellulose, and other impurities, resulting in cleaner fibers with improved bonding characteristics and enhanced tensile strength.
3Area of moving object
If conifer-derived pulp fibers are used for paper production, then the fiber width is increased, but the surface smoothness is reduced
Solution Approach 1:
The patent applies parameter changes through ozone treatment to reduce fiber width and modify surface properties of conifer fibers. The oxidative action selectively removes material from the fiber surface and reduces overall fiber dimensions, enabling better surface smoothness in the resulting paper.
Solution Approach 2:
The patent applies extraction by removing excess material from conifer fibers through ozone oxidation. This includes extracting lignin, hemicellulose, and surface contaminants, which reduces fiber width and creates a cleaner fiber surface that contributes to smoother paper surfaces.
4Length of moving object
If mechanical beating is applied to conifer fibers, then the fiber length is reduced and surface area is increased, but energy consumption increases
Solution Approach 1:
The patent merges mechanical beating with chemical ozone treatment in a combined process. The mechanical beating provides initial fiber separation and surface area increase, while the ozone treatment continues the fiber modification chemically, reducing the need for excessive mechanical energy input to achieve the desired fiber characteristics.
Solution Approach 2:
The patent substitutes part of the mechanical beating process with chemical ozone treatment. Instead of relying solely on mechanical energy to reduce fiber length and increase surface area, the ozone chemically modifies the fibers to achieve similar effects with reduced mechanical energy consumption.
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 method produces conifer-derived pulp fibers with reduced fiber length and increased branching, leading to a smoother paper surface, increased tensile strength, and enhanced dehydration efficiency, suitable for high-quality paper production.
Implementation Method 1
an ozone treatment step of treating the beaten material pulp fibers with ozone water
Data Source
AI summary
A method of producing conifer-derived pulp fibers for paper includes a beating step of beating conifer-derived material pulp fibers in the presence of a liquid including water; and an ozone treatment step of treating, with ozone water, the beaten conifer-derived material pulp fibers.