Biobased Filter Material for Sustainable Food Packaging
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Solution Overview
Problem
Existing food packaging materials, such as tea bags, rely on synthetic plastic binders that are non-biodegradable and contribute to environmental pollution, while there is a growing demand for sustainable, biodegradable alternatives that maintain strength and functionality.
Innovation Solution
A filter material is developed using natural cellulosic fibers and a non-fibrous, hydrophobic binder such as polylactic acid (PLA), polyglycolic acid (PGA), or their copolymers, which enhances the wet tensile strength and wet crimp strength of the material, preventing water ingress and maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If synthetic plastic binders are used in filter materials, then wet tensile strength and wet crimp strength are improved, but biodegradability and environmental sustainability deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters of the binder from synthetic plastic to biobased polymers (polylactic acid, polyglycolic acid, or their copolymers) while maintaining the non-fibrous particulate form. This parameter change enables the binder to provide adequate wet strength for filter materials while being biodegradable and environmentally sustainable, directly resolving the contradiction between strength improvement and environmental harm.
Solution Approach 2:
The patent creates a composite binder system combining biobased polymers (polylactic acid, polyglycolic acid, or their copolymers) with natural cellulosic fibers. This composite material approach allows the biobased binder to enhance wet tensile strength and wet crimp strength of the filter material while maintaining biodegradability, thus resolving the contradiction between improved strength and environmental sustainability.
2Object-affected harmful factors
If biobased binders are used to replace synthetic plastic, then biodegradability is improved, but wet tensile strength and wet crimp strength deteriorate
Solution Approach 1:
The patent optimizes the physical and chemical parameters of the biobased binder by selecting specific polymers (polylactic acid, polyglycolic acid, or their copolymers) in non-fibrous particulate form. This parameter optimization enables the biobased binder to achieve adequate wet tensile strength and wet crimp strength while maintaining biodegradability, resolving the contradiction between improved biodegradability and deteriorated strength.
Solution Approach 2:
The patent copies the functional properties of synthetic plastic binders (adhesion, cohesion, and structural reinforcement) using biobased polymers. By replicating the binding and strengthening functions of synthetic plastics through biobased alternatives, the patent achieves both improved biodegradability and maintained strength performance.
3Strength
If non-fibrous binders are used, then wet crimp strength is improved, but material complexity increases
Solution Approach 1:
The patent changes the physical form parameter of the binder from fibrous to non-fibrous particulate form. This parameter change simplifies the material structure and processing while enabling the binder to effectively enhance wet crimp strength, resolving the contradiction between improved strength and increased material complexity.
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 use of biobased and biodegradable binders significantly improves the wet crimp strength and tensile strength of the filter material, ensuring effective containment of beverage contents and compliance with biodegradability standards, while reducing environmental impact.
Implementation Method 1
The inventors have in particular found that these specific biobased and biodegradable binders may firmly bind to (in particular natural cellulosic) fibers, may be hydrophobic and may prevent water ingress into the crimped area, thus enhancing the strength of the crimp.
Implementation Method 2
The inventors have in particular found that these specific biobased and biodegradable binders may firmly bind to (in particular natural cellulosic) fibers
Data Source
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AI summary
The present invention relates to a filter material having advantageous properties in terms of sustainability and/or strength, the use of a non-fibrous binder for enhancing certain properties of a filter material, a process for producing the filter material and food packaging, in particular tea bags, made from the filter material. The filter material comprises fibers and at least one non-fibrous binder selected from the group consisting of polylactic acid, polyglycolic acid and copolymers.