Legume Dextrin Molecular Weight Control for High Dry Matter Coatings
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Solution Overview
Problem
The paper industry faces challenges in achieving high dry matter concentrations in coating compositions for paper and cardboard, which are essential for energy efficiency and stability, while also needing to reduce the use of synthetic materials and ensure optimal rheological properties and printing performance.
Innovation Solution
The use of legume dextrins with specific molecular weights, amylose content, and branching rates, characterized by molecular weights between 0.11 and 0.40 × 10^6, amylose content less than 60%, and a sol/gel transformation temperature below 20°C, allows for the preparation of high dry matter colloidal solutions with improved stability and rheological properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If high dry matter concentrations are used in coating compositions, then energy efficiency and stability are improved, but achieving optimal rheological properties and printing performance becomes more difficult
Solution Approach 1:
The patent changes the molecular weight parameter of the dextrin to a specific range (0.11-0.40 × 10^6) to optimize the balance between dry matter concentration, stability, and rheological properties. This parameter optimization allows high dry matter content while maintaining workability and printing performance
2Loss of energy
If high dry matter concentrations are used in coating compositions, then energy efficiency and stability are improved, but printing performance may deteriorate
Solution Approach 1:
The patent optimizes the molecular weight parameter of dextrin to a specific range (0.11-0.40 × 10^6) to maintain printing performance while achieving high dry matter concentrations. This precise parameter control ensures that energy efficiency is improved without sacrificing print quality
3Object-generated harmful factors
If synthetic materials are reduced in coating compositions, then environmental sustainability is improved, but achieving optimal coating performance becomes more challenging
Solution Approach 1:
The patent changes to using legume-based dextrin with specifically controlled molecular weight (0.11-0.40 × 10^6), replacing synthetic materials while maintaining coating performance through optimized natural polymer parameters
Solution Approach 2:
The patent uses legume dextrin as a natural polymer composite material that combines environmental sustainability with effective coating performance, achieving both ecological and functional objectives
4Stability of the object's composition
If dextrin molecular weight is reduced to improve colloidal solution stability, then stability is improved, but viscosity and coating applicability may worsen
Solution Approach 1:
The patent optimizes the molecular weight parameter to a specific range (0.11-0.40 × 10^6) that balances colloidal solution stability with appropriate viscosity and coating applicability, avoiding both extremes
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 enables the development of coating compositions with high dry matter content, ensuring stability and energy savings during preparation and application, while providing adapted rheological properties and improved printing performance.
Implementation Method 1
a sol/gel transformation temperature below 20°C
Data Source
AI summary
The invention relates to the use of at least one leguminous starch derivative having a predetermined molecular mass in weight and a predetermined sol/gel transition temperature for preparing a composition for laying paper or flat carton. The invention also relates to the leguminous starch derivative and to laying compositions prepared from the same, in particular with high dried materials.