Modified Filler Composition for Paper Strength and Retention
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Solution Overview
Problem
Fillers used in papermaking reduce the strength of paper products and are difficult to retain, limiting their incorporation and resulting in unsatisfactory cost savings.
Innovation Solution
A modified filler composition combining a selected filler material with a binder and a reactant, which modifies the filler to encapsulate it and prevent disruption of the paper's structural integrity, allowing for increased filler usage without strength loss, comprising materials like starch, glyoxal, and calcium carbonate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If filler is added to improve optical properties and reduce cost, then optical properties are improved and cost is reduced, but strength is reduced and retention is difficult
Solution Approach 1:
The patent applies composite materials by combining filler particles with binder materials to form aggregated filler compositions. These composites integrate multiple materials (filler, binder, and optionally reactants) to achieve properties that neither component alone could provide - specifically, the filler provides optical properties while the binder maintains strength and retention.
Solution Approach 2:
The patent changes the physical and chemical parameters of the filler by treating it with binders and reactants. This modification transforms the filler from a simple particulate material into a chemically modified composite that exhibits improved bonding characteristics, retention properties, and strength maintenance while preserving optical benefits.
2Quantity of substance
If filler is added to replace expensive fiber and reduce cost, then cost is reduced, but retention in web forming process is difficult
Solution Approach 1:
The binder material serves as an intermediary between the filler particles and the paper matrix. This intermediary substance facilitates the interaction between filler and fiber, enabling the filler to be retained in the web forming process while maintaining the cost-reduction benefit of filler substitution.
Solution Approach 2:
By creating composite filler-binder structures, the patent improves retention through the binder's ability to bond with both filler particles and paper fibers, ensuring the filler remains integrated in the final product while achieving cost savings.
3Manufacturing precision
If filler is added to improve surface smoothness and print quality, then surface smoothness and print quality are improved, but strength is reduced
Solution Approach 1:
The composite filler-binder structure allows the filler to perform its surface-smoothing function while the binder component compensates for strength loss by forming bonding networks that integrate the filler into the paper matrix, thereby maintaining both surface quality and strength.
Solution Approach 2:
The binder material is localized around filler particles, creating regions of enhanced bonding at filler-fiber interfaces. This local reinforcement ensures that areas with high filler content (needed for surface smoothness) do not become weak points in the overall paper structure.
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 modified filler composition enhances the tensile and bond strength of paper products while maintaining optical properties, enabling higher filler content without diminishing the product's quality or increasing costs.
Implementation Method 1
heating the binder to a temperature in the range of about 140° F. to about 320° F... adding the reactant to the binder and filler material combination and mixing the three components together at a selectable temperature
Data Source
AI summary
A modified filler composition for use in composites, such as paper and paper board, which is produced by reacting a filler material with a binder and a reactant material. Also, a method to produce composites, such as paper and paperboard, produced containing the modified filler composition is disclosed.