Cellulose-based insulation and methods of making the same
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Solution Overview
Problem
Conventional cellulose insulation made from short fiber residuals (SFR) faces challenges in achieving desired thermal performance and fire retardancy due to high density and dust issues, making it unsuitable for blown-in applications, while also being costly and environmentally inefficient.
Innovation Solution
The formation of cellulose-based insulation using SFR and other fiber residuals into superstructures with voids, treated with fire retardants before drying, which reduces density and enhances structural integrity, allowing for effective insulation with lower material costs and reduced environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cellulose insulation is made from short fiber residuals (SFR), then material cost is reduced and environmental impact is minimized, but the insulation density becomes too high and dust issues increase, making it unsuitable for blown-in applications
Solution Approach 1:
The patent applies parameter changes by treating the SFR with a chemical solution that modifies the fiber properties, specifically reducing the fiber stiffness and increasing the lumen diameter. This allows the short fibers to form a more open, less dense structure that is suitable for blown-in applications while maintaining cost effectiveness and environmental benefits.
Solution Approach 2:
The patent creates a composite material structure by combining SFR with a binding agent or coating that encapsulates the fibers and prevents dust generation. This composite approach maintains the cost and environmental advantages of SFR while solving the dust and density problems through the addition of a functional coating or binder.
2Adaptability or versatility
If SFR is used to make cellulose insulation, then feedstock availability is increased and waste utilization is improved, but fire retardant characteristics and thermal performance are compromised
Solution Approach 1:
The patent applies preliminary action by pre-treating the SFR with fire retardant chemicals during the manufacturing process, before the insulation is installed. This ensures that the fire retardant properties are embedded in the material structure from the beginning, addressing fire safety concerns while utilizing the versatile SFR feedstock.
Solution Approach 2:
The patent introduces a chemical intermediary or treatment solution that facilitates the incorporation of fire retardant properties into the SFR structure. This intermediary substance acts as a bridge between the SFR fibers and the fire retardant chemicals, ensuring effective protection while maintaining the advantages of using SFR as feedstock.
3Ease of operation
If conventional cellulose insulation is blown into place, then installation flexibility is improved, but maintaining proper density is difficult as insulation settles over time
Solution Approach 1:
The patent applies dynamics by creating an insulation material with controlled flexibility and rebound properties. The treated SFR fibers are engineered to maintain their loft and resist settling after installation, providing both the installation flexibility of blown-in insulation and the long-term density stability needed for sustained thermal performance.
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 method enables the production of cost-effective, fire-resistant cellulose insulation with improved thermal performance and reduced settling, addressing the limitations of SFR by forming superstructures that maintain low bulk density and minimize dust issues during installation.
Implementation Method 1
the pieces are mixed or coated with a fire retardant chemical, which is usually a chemical in powder (i.e., solid) form that adhere to the cellulosic pieces
Implementation Method 2
insulation is widely used for the purpose of passive thermal control
Data Source
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AI summary
A cellulose-based fire resistant insulation and related method for making the same. The insulation includes a plurality of superstructures that establish voids in the insulation. The insulation may be blown in place while the superstructures maintain the void portion of the insulation. The insulation is made with fiber residuals, either alone or in combination with other cellulosic materials. The method of making the insulation includes the steps of treating the cellulosic materials with a fire retardancy chemical or chemicals and creating bonds between the fibers to form the superstructures.