Microfibrillated Cellulose High Shear Treatment for Paper Burst Strength
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Solution Overview
Problem
Existing methods for enhancing paper burst strength using microfibrillated cellulose do not further improve this property beyond a certain point, and there is a need for a process to modify paper properties such as burst strength, tensile strength, and porosity in paper products.
Innovation Solution
Subjecting an aqueous suspension of microfibrillated cellulose and optional inorganic particulate material to high shear, generated by a moving shearing element, to enhance paper properties like burst strength, tensile strength, and porosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If microfibrillated cellulose is used as a filler to replace mineral filler, then paper burst strength is improved, but the mechanical strength enhancement reaches a limit and cannot be further improved by conventional methods
Solution Approach 1:
The patent applies high shear treatment to microfibrillated cellulose to modify its physical and chemical parameters, including surface area, porosity, and fibril structure. This parameter modification enables further improvement of paper burst strength beyond what conventional microfibrillated cellulose can achieve, resolving the limitation of reaching a strength enhancement ceiling
2Strength
If high shear treatment is applied to microfibrillated cellulose, then paper burst strength and tensile strength are improved, but porosity is reduced
Solution Approach 1:
High shear treatment modifies the porosity parameter of microfibrillated cellulose to optimize its paper-making properties. The controlled reduction in porosity through shear treatment creates a denser fibril structure that enhances mechanical strength while maintaining sufficient porosity for paper formation and drainage characteristics
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 high shear treatment increases paper burst strength and other mechanical properties, such as tensile strength and reduces porosity, resulting in improved paper products with enhanced performance characteristics.
Implementation Method 1
subjecting an aqueous suspension comprising microfibrillated cellulose and optionally inorganic particulate material to high shear, wherein the high shear is generated, at least in part, by a moving shearing element
Data Source
AI summary
A process for modifying the paper burst strength enhancing attributes of microfibrillated cellulose, an aqueous suspension comprising said microfibrillated cellulose, and papermaking compositions and paper products comprising said microfibrillated cellulose.