Natural nonwoven materials
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Solution Overview
Problem
Current methods for processing natural fibres, such as pineapple leaf fibres, often require chemical degumming which can damage the fibres and result in a coarse texture, and there is a need for environmentally friendly techniques to produce high-quality nonwoven materials from renewable resources.
Innovation Solution
A multilayered nonwoven stack material composed of 80-100% leaf or stem fibres and 0-20% fusible polymer, where the polymer is fusible at 180°C or less, is created using air laying and enzymatic degumming processes to produce a strong, biodegradable material resembling leather.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical degumming methods are used to process natural fibres, then the fibres can be separated and processed, but the fibres are damaged and produce a coarse texture
Solution Approach 1:
The patent changes the fundamental parameter of the degumming process from chemical to enzymatic. Enzymes such as cellulase, hemicellulase, pectinase, and xylanase are used to selectively degrade gum and hemicellulose components at controlled temperatures and pH levels, achieving fibre separation without the harsh chemical treatment that damages fibre strength and produces coarse texture.
Solution Approach 2:
The patent introduces enzymes as intermediary substances that mediate between the natural fibre material and the desired processed state. These biological catalysts act as gentle intermediaries that break down specific components (gum and hemicellulose) without directly attacking the cellulose fibre structure, thus preserving fibre quality while achieving separation.
2Ease of manufacture
If chemical processes are used for fibre processing, then degumming can be achieved, but toxic chemicals are used and environmental impact increases
Solution Approach 1:
The patent substitutes chemical processes with enzymatic processes. Instead of using toxic chemical reagents for degumming, the invention employs biological enzymes that naturally occur in the fibre material or can be introduced as catalysts. This substitution eliminates the need for harmful chemicals while maintaining effective degumming capability.
Solution Approach 2:
The patent converts the naturally occurring gum and hemicellulose components, which are typically considered unwanted impurities, into beneficial elements for the process. By using enzymes to selectively degrade these components, the invention transforms what would be processing obstacles into controlled reaction substrates, achieving clean separation without chemical pollution.
3Ease of manufacture
If conventional degumming methods are used, then fibre separation is achieved, but additional softening agents are required
Solution Approach 1:
The patent merges multiple functions into the enzymatic treatment process. The same enzymatic cocktail that performs degumming (removing gum and hemicellulose) also simultaneously softens the fibre material by breaking down rigid structural components. This consolidation eliminates the need for separate softening agent application steps, reducing process complexity while achieving both separation and softening objectives.
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 solution results in a strong, biodegradable material with good tensile strength and fine denier, suitable for various applications including artificial leather, while avoiding the use of toxic chemicals and reducing environmental impact.
Implementation Method 1
each of the layers, which may be the same or different, comprising a composite fibre material of from about 80 to 100% w/w leaf or stem fibre and from about 0 to 20% w/w of a polymer, wherein the polymer is fusible at a temperature of about 180° C. or less
Data Source
AI summary
There is described a nonwoven material comprising a multilayered stack, the multilayered stack comprising discrete interconnected layers, each of the layers, which may be the same or different, comprising a composite fibre of from about 80 to 100% w/w leaf or stem fibre and from about 1 to 20% w/w of a polymer, wherein the polymer is fusible at a temperature of about 180° C. or less. There is also described a novel method of enzyme degumming leaf and/or stem fibres.