Biodegradable Spout Using Plant-Based Biopolymer and PLA Blend
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Solution Overview
Problem
Conventional plastic spouts used for accessing and dispensing fluids from containers are not biodegradable and may contain harmful chemicals like phthalates and bisphenol-A, posing environmental and health risks.
Innovation Solution
A biodegradable and compostable spout made from a blend of plant-based biopolymers, polylactic acid, coconut husk, coffee grounds, and calcium, processed through injection molding with controlled heating zones to create a strong and safe dispensing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional plastic materials are used to form spouts, then manufacturing durability and flexibility are improved, but environmental biodegradability deteriorates and harmful chemical exposure increases
Solution Approach 1:
The patent applies composite materials by combining polylactic acid (PLA) with natural fibers (cellulose, starch, or protein-based materials) to create a biodegradable spout that maintains structural integrity. The composite formulation allows the spout to achieve necessary durability and flexibility while being composed of environmentally benign materials that decompose naturally, resolving the contradiction between strength and environmental harm.
Solution Approach 2:
The patent changes the material composition parameters by specifying that the biopolymer content must be at least 20% by weight of the total composite material. This parameter change ensures the spout achieves adequate mechanical properties for durability while maintaining biodegradability, thus resolving the contradiction between strength and environmental harm.
2Object-affected harmful factors
If biodegradable plastic materials are used, then environmental compatibility is improved, but manufacturing reliability and structural strength deteriorate
Solution Approach 1:
The patent uses composite materials combining biodegradable PLA with natural fibers (cellulose, starch, or protein-based materials) to maintain structural reliability. The synergistic combination allows the biodegradable components to provide environmental compatibility while the fiber reinforcement ensures mechanical strength and manufacturing reliability, resolving the contradiction between environmental compatibility and structural reliability.
Solution Approach 2:
The patent specifies parameter ranges for biopolymer content (at least 20% by weight) and incorporates heating zones set at specific temperature ranges to properly process the composite materials. These parameter controls ensure that biodegradable materials achieve the necessary structural reliability for spout functionality, resolving the contradiction between environmental compatibility and manufacturing reliability.
3Manufacturing precision
If injection molding with multiple heating zones is used, then material homogeneity and product quality are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the injection molding barrel into multiple heating zones with different temperature settings. Each zone is optimized for specific processing requirements: the first heating zone melts the biopolymer, the second zone maintains temperature for fiber incorporation, and the third zone ensures proper mixing. This segmentation achieves material homogeneity while keeping each individual heating zone relatively simple, resolving the contradiction between manufacturing precision and device 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 solution provides a safe and environmentally friendly spout that can be composted, reducing plastic waste and exposure to harmful chemicals, while maintaining functionality for accessing and resealing containers.
Implementation Method 1
feeding the plant based biopolymer and the polylactic acid (PLA) into a barrel having a plurality of heating zones forming a molten mixture
Implementation Method 2
an injection screw moving the molten mixture through the barrel
Data Source
AI summary
A biodegradable and/or compostable device is formed of a plant-based biopolymer in a range of 50 to 80% by volume and a polylactic acid (PLA) in a range of 10 to 30% by volume.