Self-Binding Pigment Suspensions via Polysaccharide Binders
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Solution Overview
Problem
Current processes for preparing self-binding pigment particle suspensions face challenges in reducing latex-based binder content, achieving sufficient tensile index, minimizing fossil resource components, enhancing biodegradability, and ensuring microbiological stability, while also reducing sticky materials and handling difficulties.
Innovation Solution
A process involving the use of an aqueous pigment material suspension mixed with a polymeric binder comprising polysaccharides with galactose and/or mannose units, followed by grinding to produce self-binding pigment particles with reduced binder and fossil resource content, improved biodegradability, and increased microbiological stability, achieving a tensile index of at least 10 Nm/g.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If latex-based binder is used in self-binding pigment particle suspensions, then mechanical stability and adhesion are improved, but binder content and fossil resource usage increase
Solution Approach 1:
The patent changes the chemical composition parameters of the binder by replacing conventional latex-based polymers with polysaccharide derivatives (carboxymethyl cellulose, carboxymethyl hydroxyethyl cellulose, carboxymethyl hydroxypropyl cellulose). This substitution maintains the binding function while reducing fossil resource content and improving biodegradability, directly addressing the contradiction between mechanical stability and binder content reduction.
Solution Approach 2:
The patent creates composite self-binding pigment particles combining mineral materials (calcium carbonate) with polysaccharide-based binders. This composite approach allows the system to achieve both mechanical stability through the mineral-binder composite structure and reduced environmental impact through the use of renewable polysaccharide materials instead of conventional latex binders.
2Object-generated harmful factors
If polysaccharide-based binder is used to reduce fossil resource content, then biodegradability is improved, but microbiological stability may be compromised
Solution Approach 1:
The patent modifies the chemical parameters of natural polysaccharides by introducing carboxymethyl groups through chemical modification. This creates carboxymethyl cellulose derivatives that maintain the biodegradability advantage of natural polysaccharides while the modified chemical structure provides enhanced microbiological stability, preventing the contradiction between these two properties.
Solution Approach 2:
The patent employs readily available, naturally occurring polysaccharide materials (cellulose, starch derivatives) that are inexpensive and biodegradable. These renewable materials serve as sustainable alternatives to conventional petroleum-based binders, providing both economic benefits and environmental advantages while maintaining functional performance.
3Manufacturing precision
If grinding is performed to reduce particle size, then self-binding pigment particle formation is improved, but energy consumption and processing time increase
Solution Approach 1:
The patent performs preliminary classification of mineral materials before grinding to remove fine particles and impurities. This preliminary action reduces the grinding load and time required, as the subsequent grinding process only needs to process the coarser material that requires size reduction, rather than processing already-fine particles.
Solution Approach 2:
The patent employs dynamic grinding conditions with controlled parameters including adjustable grinding media size, grinding chamber geometry, and processing time. The system dynamically optimizes these parameters to achieve the desired particle size distribution efficiently, balancing energy consumption with processing time to produce self-binding pigment particles with appropriate size for the application.
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 process results in self-binding pigment particle suspensions with reduced binder and fossil resource content, improved biodegradability, and enhanced microbiological stability, imparting a tensile index of at least 10 Nm/g to paper products, while minimizing sticky materials and handling issues.
Implementation Method 1
the binder, generally latex-based and in the form of aqueous suspensions or dispersions, provide the necessary adhesion and cohesion for the respective constituents of the end product to be produced
Implementation Method 2
the binder, generally latex-based and in the form of aqueous suspensions or dispersions, provide the necessary adhesion and cohesion for the respective constituents of the end product to be produced
Implementation Method 3
grinding refers to an operation leading to a reduction in the particle size
Data Source
AI summary
The invention relates to a process for preparing self-binding pigment particle suspensions, to a self-binding pigment particle suspension as well as to a paper product comprising self-binding pigment particles and to the use of the self-binding pigment particle suspension as filler material.