Colloidal Polymer-Aluminum Hydroxide Sizing Particles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The papermaking process faces challenges in retaining fibers and achieving adequate strength and water resistance in the final paper product, particularly due to inefficiencies in the sizing technology used.
Innovation Solution
The introduction of colloidal particles comprising a polymer embedded within a colloidal aluminum hydroxide or ferric hydroxide complex, combined with a sizing agent, into the papermaking process water, specifically designed to improve the retention and performance of the sizing agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sizing agents are added to paper furnish to achieve water resistance, then water resistance is improved, but fiber retention deteriorates due to particles being washed away during drainage
Solution Approach 1:
The invention uses composite particles consisting of sizing agent particles combined with fluorescent polymer particles. This composite structure allows the sizing agent to provide water resistance while the fluorescent polymer component improves visibility and retention characteristics, preventing loss during drainage.
Solution Approach 2:
The invention changes the physical and chemical parameters of the sizing agent system by incorporating fluorescent polymers with specific molecular weights and functional groups. This modification alters the particle properties to enhance both water resistance and fiber retention simultaneously.
2Object-affected harmful factors
If sizing agents are used to provide water resistance, then water resistance is improved, but adequate strength is compromised due to particle loss
Solution Approach 1:
The composite particle system combines sizing agents with fluorescent polymer particles, creating a dual-function material that provides both water resistance and enhanced strength. The fluorescent polymer component contributes to paper strength while the composite structure prevents particle loss during processing.
Solution Approach 2:
The fluorescent polymer acts as an intermediary between the sizing agent and the paper matrix, improving the bonding and retention of sizing particles. This intermediary function ensures that sizing agents remain in the paper sheet to provide both water resistance and strength.
3Object-affected harmful factors
If conventional sizing agents are applied to achieve water resistance, then sizing performance is improved, but measurement and monitoring become difficult due to particle invisibility
Solution Approach 1:
The invention incorporates fluorescent polymer particles that emit visible fluorescence under UV light. This color/fluorescence change enables easy detection, monitoring, and measurement of sizing agent distribution and performance in the paper sheet, solving the visibility problem of conventional sizing particles.
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 approach significantly enhances the sizing agent's performance, leading to improved water resistance and strength of the paper product, while also optimizing fiber retention during the papermaking process.
Implementation Method 1
particles of the sizing agent are capable of forming larger agglomerates, which are adsorbed onto the surfaces of the fibers and fillers of the paper furnish
Implementation Method 2
Influenced by drying temperature, the particles of the sizing agent generally melt and spread onto the fiber surface
Implementation Method 3
Reactive functional groups of the sizing agent direct inward toward the fibers and hydrophobic groups of the sizing agent direct outward away from the fibers. The reactive functional groups react with a hydroxyl group of the cellulose of the fiber, forming a covalent bond
Data Source
AI summary
Compositions, components, and colloidal particles are provided that may be used to improve a papermaking process. The compositions and colloidal particles may include a polymer and an inorganic salt. A sizing agent may also be a component of a composition or added separately to papermaking process water. A papermaking process carried out using the presently disclosed compositions, components, and colloidal particles may produce a paper product that has increased sizing properties.