Thermal Liner Structure With Metallized PE Foam for Cargo Insulation
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Solution Overview
Problem
Existing thermal insulation products for transporting perishable goods have a high coefficient of thermal conductivity and lack the ability to monitor thermal performance in real-time.
Innovation Solution
A thermal liner made of laminated metallized polyethylene foam with light-reflecting and heat-shielding properties, combined with a black polyethylene film for UV protection, is used to reduce thermal conductivity and maintain temperature stability. The liner is designed to fit the inner shape of a container, with eyelets for secure mounting and a reflective film to prevent external temperature penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional thermal insulation materials are used, then the structure is simple, but the coefficient of thermal conductivity is high
Solution Approach 1:
The patent applies composite materials by combining polyethylene foam with metallized film and black film layers. The polyethylene foam provides base thermal insulation, while the metallized film adds reflective thermal barrier properties and the black film provides UV protection. This multi-layer composite structure achieves superior thermal insulation performance with reduced thermal conductivity compared to conventional single-material insulation.
2Quantity of substance
If conventional insulation materials are used, then the material cost is low, but the thermal insulation performance is insufficient
Solution Approach 1:
The patent combines multiple materials (polyethylene foam, metallized film, black film) where each layer contributes specific functions. The polyethylene foam provides cost-effective bulk insulation, while the metallized and black films add enhanced thermal reflection and UV protection at relatively low incremental cost, achieving high thermal insulation performance without excessive material expense.
Solution Approach 2:
The patent applies different material properties to different layers: the polyethylene foam provides uniform thermal insulation throughout the bulk, while the metallized film specifically addresses radiant heat transfer through reflection, and the black film targets UV radiation protection. This localized functional assignment optimizes overall insulation performance.
3Ease of manufacture
If standard liner design is used, then the manufacturing is simple, but the thermal stability is insufficient
Solution Approach 1:
The patent uses a multi-layer composite structure where polyethylene foam layers are laminated with metallized film and black film. This composite construction maintains thermal stability by combining materials with complementary properties: the foam provides structural integrity and bulk insulation, while the film layers provide reflective and UV-blocking barriers, together maintaining consistent thermal performance under varying transportation conditions.
Solution Approach 2:
The patent implements a nested multi-layer structure where the metallized film and black film are embedded within or attached to the polyethylene foam layers. This nested arrangement allows each material to function within its optimal zone while being protected by the surrounding layers, enhancing overall thermal stability without complicating the manufacturing process.
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 significantly reduces thermal conductivity, maintaining a temperature difference of at least 9 degrees and providing effective UV protection, ensuring thermal stability during transportation across varying conditions.
Implementation Method 1
laminated metallized polyethylene foam (PE foam) with light-reflecting and heat-shielding ability
Implementation Method 2
the thermal liner is made of a set of materials, and laminated metallized polyethylene foam (PE foam) with light-reflecting and heat-shielding ability as the thermal insulating material
Implementation Method 3
a black polyethylene film with the possibility of avoiding ultraviolet rays through the liner
Data Source
AI summary
The thermal liner relates to the field of thermal insulation for transporting goods and contains a thermal insulating material, and its components are hermetically connected. At that, the liner repeats the inner shapes of the container; it has a front wall that opens, and its fastening elements are made along the upper perimeter with the possibility of fixing the liner in the container using a mounting cord and the inner lugs of the metal container. The thermal liner is made of a set of materials, and laminated metallized polyethylene foam (PE foam) as the thermal insulating material and a black polyethylene film, which provides the desired temperature difference between the external and internal temperatures and reduces the thermal conductivity of the product.