PEO Polyacrylamide Additive for Paper Ash Retention
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Solution Overview
Problem
In the paper and paperboard manufacturing industry, the increased use of fillers leads to reduced retention and strength of the final paper product, limiting the ability to enhance physical properties and increase fiber replacement, which in turn affects machine performance and costs.
Innovation Solution
The combination of poly(ethylene oxide) (PEO) and a polyacrylamide polymer as an additive in paper compositions, which can be present in specific weight percentages and ratios, significantly increases ash retention, allowing for higher filler content without sacrificing paper quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If filler content in paper composition is increased to save cost and improve physical properties, then fiber replacement and cost savings are achieved, but ash retention is reduced leading to decreased machine performance and paper strength
Solution Approach 1:
The patent combines PEO and polyacrylamide polymer into a single additive composition that provides synergistic ash retention enhancement. This merged additive achieves superior filler retention compared to using either polymer alone or separate additions, enabling higher filler content while maintaining reliable ash retention.
Solution Approach 2:
The invention uses a composite additive system comprising PEO and polyacrylamide polymer in specific weight ratios (PEO: 1-15 wt%, polyacrylamide: 20-40 wt%). This composite material leverages the complementary properties of both polymers to achieve enhanced ash retention and filler stability at higher filler loadings.
2Quantity of substance
If filler content is increased to replace fiber material, then cost savings are achieved, but paper strength and physical properties are reduced
Solution Approach 1:
By merging PEO and polyacrylamide polymer into a single additive system, the patent achieves synergistic enhancement of filler retention and paper strength. This combined approach allows higher fiber replacement while maintaining paper strength through improved filler-polymer-fiber interactions.
Solution Approach 2:
The patent optimizes the weight ratios of PEO to polyacrylamide polymer (within specific ranges) to achieve maximum filler retention and paper strength at high filler loadings. This parameter optimization enables effective fiber replacement while preserving essential paper properties.
3Reliability
If conventional additives (PEO alone or polyacrylamide alone) are used for ash retention, then some retention improvement is achieved, but the effect is limited and higher amounts of additive are required
Solution Approach 1:
The patent merges PEO and polyacrylamide polymer into a synergistic additive system where the combination produces more than additive effects. This merged system achieves superior ash retention at lower total additive concentrations compared to using either polymer alone or adding them separately.
Solution Approach 2:
By changing the additive composition parameters to include both PEO and polyacrylamide polymer in optimized weight ratios, the patent achieves enhanced ash retention efficiency. This parameter change allows reduced additive dosing while maintaining or improving ash retention performance.
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 combination achieves a more-than-additive effect in ash retention, enabling the use of reduced amounts of PEO and polyacrylamide polymer, resulting in improved physical properties and cost savings while maintaining or exceeding the ash retention performance of conventional additives.
Implementation Method 1
The additive is capable of increasing ash retention of a paper composition by at least about 25% relative to ash retention of a paper composition having an additive comprising PEO alone, an additive comprising polyacrylamide polymer alone, or the separate addition of both an additive comprising PEO alone and an additive comprising polyacrylamide polymer alone
Data Source
AI summary
Provided herein are additives for paper compositions comprising poly(ethylene oxide) (PEO) and polyacrylamide polymer that are capable of increasing the ash retention of the paper composition. Also provided are methods of making a paper composition using the additives of the disclosure.