Paper-Based Insulating Dunnage for Refrigerated Shipping
Solution Overview
Problem
Current refrigerated shipping systems using molded polystyrene liners face issues with storage space requirements, non-recyclability, hazardous byproducts upon burning, and persistent environmental presence, leading to disposal problems.
Innovation Solution
A paper-based insulating dunnage product is developed, featuring deformed paper sheets forming air pockets within an outer cover, providing insulation and cushioning while being compact, recyclable, and produced on demand, reducing storage needs and facilitating easier disposal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If molded polystyrene liners are used for refrigerated shipping, then insulation performance is achieved, but storage space requirements increase and environmental harm worsens
Solution Approach 1:
The polystyrene liner is segmented into multiple smaller insulation pieces or panels that can be stored more efficiently and assembled as needed, reducing overall storage space while maintaining insulation performance
Solution Approach 2:
The insulation material is transformed from a rigid three-dimensional molded structure to a two-dimensional flat panel or sheet that can be compressed and stored in less space, yet still provides adequate thermal insulation when deployed
2Temperature
If molded polystyrene liners are used for refrigerated shipping, then insulation performance is achieved, but recyclability and environmental compatibility worsen
Solution Approach 1:
The material composition is changed from non-biodegradable polystyrene to biodegradable or recyclable materials such as molded pulp, paperboard, or plant-based foams that provide equivalent insulation while being environmentally compatible
Solution Approach 2:
A composite insulation structure is used combining multiple materials such as paperboard layers with air pockets, or plant-based materials, that achieve the required thermal insulation performance while being fully recyclable or compostable
3Temperature
If molded polystyrene liners are used for refrigerated shipping, then insulation performance is achieved, but disposal problems worsen
Solution Approach 1:
The insulation liner is designed as a disposable product made from inexpensive, easily disposed materials such as single-use paperboard or molded pulp that can be thrown away after one use without special disposal procedures
Solution Approach 2:
The insulation material is designed to be easily separated and discarded after use, or potentially recovered and composted, eliminating the disposal problems associated with persistent polystyrene waste
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 paper-based dunnage product offers effective insulation, reduces storage and transportation costs, and addresses environmental concerns by being recyclable and compostable, offering a sustainable alternative to traditional polystyrene solutions.
Implementation Method 1
a dunnage product with thermal insulation properties
Implementation Method 2
the dunnage products provide cushioning properties and air pockets that provide insulation properties
Data Source
AI summary
A method for making an insulating dunnage product (10) includes the steps of (a) permanently deforming at least one non-planar interior layer (12) that includes a paper sheet to form a plurality of air pockets (14), (b) surrounding the at least one interior layer (12) on all four sides and over the top and bottom sides of the at least one interior layer (12) with at least one outer layer (16) of sheet material and (c) peripherally sealing the at least one outer layer (16) to capture the at least one interior layer (12) therein such that the interior layer (12) has major portions that are free to shift relative to adjacent portions of the at least one outer layer (16).