Open-Cell Foam Sponge Compression for Shape Recovery After Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for compressing and transporting foam sponges fail to account for long-term compression and temperature variations during global transportation, leading to permanent loss of resilience and deformation, making them unsuitable for retail packaging and immediate consumer use.
Innovation Solution
Adding a plasticizer or water to the foam before compression, followed by warm water rinsing or hot air application upon unpacking, ensures full recovery of the foam's original size and shape within minutes, even after prolonged compression and extreme temperature exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If foam sponges are compressed and transported at high density to reduce transportation costs, then transportation efficiency is improved, but the foam loses resilience and deforms permanently after long-term compression and temperature exposure
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of the foam through adding plasticizers or water before compression. This changes the physical and chemical parameters of the foam material to prevent permanent deformation. The plasticizer or water acts as a protective agent that maintains molecular mobility and prevents the foam from entering a permanent deformed state during long-term compression and temperature variations in transportation.
Solution Approach 2:
The patent uses plasticizers or water as intermediary substances that mediate between the compression force and the foam structure. These intermediaries prevent direct harmful interaction between the compression environment and the foam polymer chains, allowing the foam to withstand compression without permanent deformation. The plasticizer/water acts as a buffer that maintains the foam's ability to recover its original shape.
2Volume of moving object
If foam sponges are compressed to 20 times higher density for retail packaging, then packaging space is reduced, but the foam fails to return to its original shape and size after unpacking
Solution Approach 1:
The patent applies preliminary action by adding plasticizers or water to the foam before compression packaging. This preparatory step ensures that the foam has the necessary chemical composition to withstand compression and recover its shape later. The plasticizer or water is incorporated in advance to prevent permanent deformation, enabling the foam to return to its original shape and size after unpacking from the compressed state.
Solution Approach 2:
The patent modifies the chemical and physical parameters of the foam by incorporating plasticizers or water, which changes the material's response to compression. This parameter change allows the foam to be compressed to 20 times higher density while maintaining the ability to fully recover its original shape and size, eliminating the permanent deformation problem.
3Adaptability or versatility
If foam sponges are subjected to temperature variations during global transportation, then global distribution is enabled, but localized compression regions develop pseudo-glass transition states that prevent full shape recovery
Solution Approach 1:
The patent applies parameter changes by adding plasticizers or water to modify the molecular-level properties of the foam. This changes the glass transition temperature and molecular free volume characteristics, preventing the formation of pseudo-glass transition states during temperature variations. The modified composition maintains molecular mobility across a wider temperature range, enabling full shape recovery after global transportation.
Solution Approach 2:
The plasticizer or water acts as an intermediary that mediates between temperature variations and the foam's molecular structure. During global transportation with temperature fluctuations, this intermediary prevents the formation of localized pseudo-glass transition states by maintaining molecular free volume and preventing excessive molecular packing in compressed regions.
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
Foam sponges regain their full size and shape within seconds to minutes after unpacking, suitable for retail packaging and immediate consumer use, reducing transportation and warehousing costs by compressing goods up to 20 times their original density.
Implementation Method 1
A method that allows vacuum or compression packed open cell foam sponges to return to their normal size and form within minutes of being removed from their high-density packaging
Implementation Method 2
there is a pseudo-glass transition state related to inter-molecular space defined whereby polymers like polyurethane, cellulose, silicones and others that may contain both hard segment (crystalline segments) and amorphous chain segments sustain a reduced molecular free volume which artificially increases the glass transition temperature
Implementation Method 3
The foam is then subjected to a temperature once again above its Tg. At the temperature above its Tg the foam expands to its original form and shape
Implementation Method 4
U.S. Pat. No. 503,622 details a method of compressing a polyurethane foam after heating it at an elevated temperature that is above its glass transition temperature (Tg). The foam is then locked into its compressed form by reducing the temperature to below the foam's Tg.
Data Source
AI summary
A method is disclosed for compressing and packaging an open cell foam sponge to more than 20 times its normal density, transporting it without any constraints related to pressure and temperature and then returning the article to its original size and shape without losing any of its resilience, shape or form. The invention is particularly useful for transporting large volumes of foam sponge materials by compressing them to less than 20% of their original volume thereby reducing transportation costs by 80% or more.