Cellulose Fiber Insulation Packaging for Cold-Chain Handling
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Solution Overview
Problem
Existing packaging technologies using cellulose fibers struggle to fully utilize their heat or cold insulating capacity due to their volatile nature, making handling cumbersome and inefficient, and they do not meet modern requirements for maintaining perishable goods at low temperatures for extended periods while being recyclable and suitable for large-scale industrial use.
Innovation Solution
The packaging employs air-permeable paper bags filled with cellulose fiber flakes, treated with lubricants to prevent sticking and enhance insulation, and an inner lining with perforations to maintain uniform distribution and facilitate gas transfer, ensuring effective insulation and recyclability without the use of fire retardants, and can maintain perishable goods at temperatures below -15°C for at least 13 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cellulose fibers are used for insulation in packaging, then heat or cold insulating capacity is improved, but handling becomes cumbersome due to volatile nature
Solution Approach 1:
The patent uses cellulose fiber flakes enclosed in air-permeable paper bags, creating a porous insulation structure that maintains thermal performance while containing the volatile fibers. The porous structure allows air circulation for equalization while preventing fiber dispersion during handling.
Solution Approach 2:
Air-permeable paper bags serve as an intermediary container that holds the cellulose fiber flakes. This mediator allows the fibers to be handled as a contained unit while still permitting air flow through the bag walls for moisture equalization, resolving the contradiction between containing volatile material and maintaining insulation performance.
2Loss of energy
If cellulose fiber flakes are used for insulation, then insulation effectiveness is improved, but uniform distribution and compression are difficult to achieve
Solution Approach 1:
The air-permeable paper bags allow air to flow through during compression, enabling uniform distribution of cellulose fiber flakes throughout the bag volume. The porous structure permits air equalization that ensures consistent insulation properties across different regions of the packaging.
3Reliability
If reusable packaging is used to meet retail industry requirements, then food safety and quality are improved, but organizational, financial, administrative and logistic burden increases
Solution Approach 1:
The patent employs a disposable packaging system made entirely of cellulose-based materials (container, insulating pads, and lining) that can be discarded after single use. This eliminates the complex logistics of reusable packaging while maintaining food safety and quality through adequate insulation performance.
Solution Approach 2:
The entire packaging system is made from homogeneous cellulose-based materials (paper container, cellulose fiber insulating pads, paper lining), simplifying both manufacturing and disposal processes. This homogeneity reduces the complexity associated with managing multiple material types in reusable packaging systems.
4Adaptability or versatility
If cellulose fiber insulation is used, then recyclability is improved, but handling complexity increases due to volatile nature
Solution Approach 1:
The air-permeable paper bags act as an intermediary that contains the volatile cellulose fiber flakes, making them easy to handle during recycling processes. The contained fibers can be easily removed and disposed of or recycled separately from the paper container and lining.
Solution Approach 2:
Since the entire packaging is made from cellulose-based materials, the insulating pads made from cellulose fiber flakes are homogeneous with the rest of the packaging, simplifying recycling by allowing all components to be processed together or easily separated as similar materials.
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 effectively utilizes cellulose fibers for insulation, protects fragile goods during transport, and allows for easy handling and recycling, maintaining a consistent low temperature for perishable goods while reducing energy exchange and enabling the use of a mono-material, fully recyclable packaging system.
Implementation Method 1
The paper of the paper bags of the insulation pads has an air permeability in the range of 3 - 5 seconds Gurley
Implementation Method 2
both the container and said insulating pads being substantially composed of cellulose fibers
Implementation Method 3
treated with lubricants to prevent sticking and enhance insulation
Implementation Method 4
an inner lining with perforations to maintain uniform distribution and facilitate gas transfer
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3
AI summary
Packaging (1) for perishable goods, comprising a container (2) and insulating pads (3), both the container and said insulating pads being substantially composed of cellulose fibers, which insulating pads are placeable adjacent to inner walls of the container, wherein the insulating pads are embodied as one or more paper bags (10) containing said cellulose fibers which are embodied as flakes.