Biodegradable Net Extrusion and Stretching for Strong Packaging
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Solution Overview
Problem
Conventional packaging articles made from polymers like polyethylene, polypropylene, and nylon are not biodegradable and contribute significantly to environmental pollution, while biodegradable polymers face limitations in processing and end-product properties.
Innovation Solution
A process involving compounding biodegradable polymers with additives, extruding, quenching, and stretching to create a biodegradable net article with enhanced mechanical strength and environmental friendliness, suitable for packaging applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional polymers (PE, PP, nylon) are used for packaging nets, then mechanical strength and processability are improved, but environmental biodegradability deteriorates
Solution Approach 1:
The patent uses composite materials by combining biodegradable polymers (PLA, PBAT, starch) with natural fibers (jute, coconut, bamboo) to create a material that maintains mechanical strength while achieving biodegradability. The composite structure allows the synthetic polymer matrix to provide strength while the natural fibers contribute to biodegradation capability.
2Object-affected harmful factors
If biodegradable polymers are used for packaging nets, then environmental friendliness is improved, but mechanical strength and processability deteriorate
Solution Approach 1:
The patent combines biodegradable polymers with natural fibers in a composite structure where the polymer matrix provides continuity and strength while the natural fiber reinforcement enhances mechanical properties. This composite approach allows biodegradable materials to achieve the mechanical strength required for packaging applications.
Solution Approach 2:
The patent modifies the physical and chemical parameters of biodegradable polymers through compounding with additives, controlling extrusion temperature, and adjusting stretching parameters to enhance their mechanical properties and processability while maintaining biodegradability.
3Object-affected harmful factors
If biodegradable polymers are used for packaging nets, then environmental friendliness is improved, but processing limitations deteriorate
Solution Approach 1:
The composite formulation with natural fibers and additives improves the thermal and rheological properties of biodegradable polymers, making them more suitable for extrusion and stretching processes. The natural fibers act as nucleating agents that enhance crystallization and improve processability.
Solution Approach 2:
The patent optimizes processing parameters including compounding temperature, extrusion temperature, quenching temperature, and stretching ratio to overcome the inherent processing limitations of biodegradable polymers and achieve successful net formation.
4Object-affected harmful factors
If biodegradable polymers are used for packaging nets, then biodegradability is improved, but end-product properties deteriorate
Solution Approach 1:
The composite structure with natural fiber reinforcement enhances the overall reliability of the biodegradable net by improving tensile strength, elongation, and dimensional stability. The synergistic combination of polymer matrix and natural fibers creates a more reliable end product compared to pure biodegradable polymers.
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 produces biodegradable nets with high mechanical strength, flexibility, and tensile strength, suitable for packaging, and is cost-effective and environmentally friendly, with a holding capacity ranging from 50 grams to 5 kg.
Implementation Method 1
The dried pellets are then extruded by using a means for extrusion at a second predetermined temperature to obtain a plurality of individually extruded strands
Implementation Method 2
The dried pellets are then extruded by using a means for extrusion at a second predetermined temperature to obtain a plurality of individually extruded strands forming an extruded net
Implementation Method 3
The extruded net is then quenched at a third predetermined temperature to obtain a quenched net
Implementation Method 4
The quenched net is then stretched at a predetermined stretch ratio in at least one fluid bath having a fourth predetermined temperature to obtain a stretched net
Implementation Method 5
The quenched net is then stretched at a predetermined stretch ratio in at least one fluid bath having a fourth predetermined temperature to obtain a stretched net
Data Source
AI summary
The present disclosure relates to a process for the preparation of biodegradable net articles. The process is easy to perform and cost-effective. The biodegradable net articles of the present disclosure have comparatively higher melting strengths, good flexibility, better orientability, and high tensile strength. The biodegradable net articles of the present disclosure are environmentally friendly. The articles such as bags made by the biodegradable net of the present disclosure are suitable for packaging applications.