Biodegradable Shipping Container with Starch Insulation
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Solution Overview
Problem
Conventional shipping containers face challenges in maintaining temperature stability during transportation, especially for perishable items, as they often rely on non-recyclable and non-biodegradable insulating materials like Styrofoam, which harm the environment.
Innovation Solution
A shipping container made of recyclable pulp material with a biodegradable starch-based insulation layer between the outer and inner trays, providing thermal insulation with an R-value of 3-5, suitable for shipping wine bottles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polystyrene-based packaging (Styrofoam) is used for thermal insulation, then insulating properties are improved, but environmental harm increases due to non-recyclability and non-biodegradability
Solution Approach 1:
The patent changes the material parameters from synthetic polystyrene to natural starch-based material, transforming the insulation medium while maintaining thermal performance. The starch pellets are expanded through controlled heating and pressurization to create an insulating foam structure with comparable R-values to Styrofoam.
Solution Approach 2:
The patent employs a porous foam structure created by expanding starch pellets. The expansion process creates numerous air pockets within the material, which provide thermal insulation through trapped air layers. This porous structure achieves the required insulating properties while using a biodegradable base material.
2Object-generated harmful factors
If pulp-based shipping containers are used, then environmental friendliness is improved through recyclability, but insulative properties deteriorate due to lack of thermal insulation
Solution Approach 1:
The patent creates a composite structure combining pulp-based outer trays with starch-based insulating material. The pulp provides structural integrity and environmental friendliness, while the starch foam provides thermal insulation. This composite approach allows both materials to contribute their strengths to the overall packaging system.
Solution Approach 2:
The patent divides the packaging into distinct functional segments: outer pulp trays for structural support and environmental compatibility, and inner starch-based insulation for thermal protection. This segmentation allows each material to be optimized for its specific function while maintaining overall system performance.
3Object-generated harmful factors
If expandable starch pellets are used for insulation, then biodegradability is improved, but manufacturing complexity increases due to additional processing steps
Solution Approach 1:
The patent uses pre-expanded starch pellets that have been prepared in advance. These pre-prepared pellets are simply placed into the packaging cavity and then heated to complete the expansion and bonding process. This preliminary preparation simplifies the final assembly process compared to creating the foam structure from raw materials during production.
Solution Approach 2:
The starch pellets undergo self-expansion when exposed to heat and pressure, transforming from compact pellets to expanded foam structure without requiring external molding equipment. The material essentially performs its own forming operation, reducing the need for complex manufacturing tooling and processes.
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 offers a sustainable, environmentally friendly insulation solution that maintains temperature stability while being easy to manufacture and recycle, addressing the environmental concerns of traditional packaging materials.
Implementation Method 1
A middle layer is provided between the outer tray and the inner tray, the middle layer including one or more insulative materials
Data Source
AI summary
A shipping container, particularly suited for shipping wine bottles within a shipping box, having a pair of container halves. Each container half includes an outer tray that is shaped to fit the shipping box, and an inner tray that is configured for securely holding one or more wine bottles. Both the outer tray and inner tray are made of readily recyclable pulp material, and have a void therebetween. A starch based biodegradable insulation material fills the void therebetween, such that the shipping container is made entirely of biodegradable material, yet is sturdy and has insulative properties.