Polysaccharide Filament Ductility via Thermal Processing
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Solution Overview
Problem
Polysaccharide filaments, such as starch-based materials, exhibit brittle properties and lack ductility, making them unsuitable for applications requiring flexibility and strength, like toilet tissue or paper towels, due to their inherent structure and the need for plasticizers or synthetic polymers which are costly or undesirable.
Innovation Solution
Processing polysaccharide filaments at elevated temperatures between 170°C to 175°C for 1 to 2 minutes to create a more homogeneous melt composition, then quickly quenching them, results in filaments with improved ductility and birefringence without the need for plasticizers or synthetic polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If plasticizers are added to polysaccharide filaments to improve ductility, then flexibility and stretchability are enhanced, but wet tensile strength deteriorates
Solution Approach 1:
The patent removes plasticizers from the polysaccharide filament composition entirely, achieving ductility through alternative means (high-amylose starch formulation and processing conditions) rather than through plasticizer addition, thus eliminating the wet strength deterioration problem
Solution Approach 2:
The patent changes the chemical composition parameters by using high-amylose starch (≥70% amylose content) and controls processing parameters (temperature, moisture content) to achieve ductile properties without plasticizers, resolving the contradiction between ductility and wet strength
2Strength
If synthetic polymers are added to polysaccharide filaments to improve mechanical properties, then ductility and strength are enhanced, but manufacturing cost increases
Solution Approach 1:
The patent eliminates synthetic polymer additives from the composition, achieving the desired mechanical properties through optimized polysaccharide formulation (high-amylose starch) and processing conditions, thereby removing the cost burden of expensive synthetic additives
Solution Approach 2:
The patent uses a homogeneous polysaccharide-based composition (high-amylose starch with controlled moisture and plastic content) throughout the filament, avoiding the need for synthetic polymer blends, which simplifies manufacturing and reduces costs
3Stability of the object's composition
If polysaccharide filaments are processed at elevated temperatures to improve homogeneity, then material uniformity is enhanced, but energy consumption increases
Solution Approach 1:
The patent optimizes the processing temperature parameter to a specific range (143-155°C) that achieves sufficient homogeneity and ductility while minimizing energy consumption, avoiding excessive heating that would waste energy
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 method produces polysaccharide filaments with an Elongation at Rupture greater than 100% and significant birefringence, enhancing their flexibility and strength, making them suitable for sanitary tissue products without the use of costly additives.
Implementation Method 1
polysaccharide filaments that exhibit birefringence
Implementation Method 2
Processing polysaccharide filaments at elevated temperatures between 170°C to 175°C
Implementation Method 3
quickly quenching them
Data Source
AI summary
Polysaccharide filaments and fibrous structures containing such polysaccharide filaments and more particularly polysaccharide filaments that exhibit birefringence are provided.