Unbonded Loosefill Insulation Tuft Geometry Optimization

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Solution Overview

Problem

Conventional loosefill insulation materials have limitations in insulative value due to their tuft density, void distribution, and fiber structure, which affect their thermal resistance and efficiency in building insulation.

Innovation Solution

The improved loosefill insulation material features shorter tuft dimensions, lower tuft density, increased irregularly-shaped projections, more extensive and evenly distributed tuft gaps, and a more cubic consistency, creating an open structure that enhances insulative properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional unbonded loosefill insulation material is used with standard tuft dimensions and density, then the material is easy to manufacture and transport, but the insulative value is limited

Engineering Contradiction:

Improveinsulative valueVSAvoidtuft structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by modifying the tuft dimensions (shorter major dimension), reducing tuft density, and changing the void distribution characteristics. These parameter modifications directly improve the insulative value by creating a more effective thermal barrier structure without requiring fundamental changes to the manufacturing process or material composition.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent utilizes porous material principles by optimizing the void spaces between and within tufts. The improved insulative value is achieved by creating a controlled porous structure where air pockets are strategically distributed to maximize thermal resistance. This approach leverages the insulating properties of trapped air within the porous tuft arrangement.

Inventive Principle:

Principle #31Porous materials

2Reliability

If tuft density is reduced to improve insulative value, then thermal resistance increases, but the material may become less stable during handling and installation

Engineering Contradiction:

Improvethermal resistanceVSAvoidmaterial stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent applies parameter changes by optimizing the balance between tuft density and tuft dimension. Rather than simply reducing density, the invention modifies multiple parameters simultaneously - shortening the major tuft dimension while adjusting density to achieve optimal thermal resistance. This multi-parameter optimization maintains material stability during handling while maximizing insulative performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite structure by combining numerous individual tufts with specific dimensional characteristics into a cohesive insulation material. The collective arrangement of these standardized tufts provides both the desired thermal resistance and sufficient structural stability for handling and installation, effectively creating a composite material system with optimized properties.

Inventive Principle:

Principle #40Composite materials

3Reliability

If shorter tuft dimensions are used to increase insulative value, then thermal efficiency improves, but the volume of material required increases

Engineering Contradiction:

Improveinsulative valueVSAvoidmaterial volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent applies parameter changes by optimizing the relationship between tuft dimensions and void distribution. The shorter tuft dimensions are compensated by optimized spacing and arrangement to achieve the desired insulative value. This parameter optimization ensures that the increased material volume is efficiently utilized to maximize thermal performance per unit of installed insulation.

Inventive Principle:

Principle #35Parameter changes

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 improved material provides higher insulative value by optimizing tuft dimensions, density, and gap distribution, leading to better thermal resistance and airflow resistance, despite maintaining the same fiber diameter as conventional materials.

Implementation Method 1

The improved unbonded loosefill insulation material having a multiplicity of tufts and a plurality of voids between the tufts. The tufts have an average major tuft dimension. The average major tuft dimension of the tufts of the improved unbonded loosefill insulation material is shorter than an average major tuft dimension of tufts of conventional unbonded loosefill insulation material, thereby providing the improved unbonded loosefill insulation material with a higher insulative value than conventional unbonded loosefill insulation material.

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS10597869B2Unbonded loosefill insulation

Publication Date: 2020.03.24 OWENS CORNING INTELLECTUAL CAPITAL LLC

AI summary

An improved unbonded loosefill insulation material having a multiplicity of tufts and a plurality of voids between the tufts is provided. The tufts have an average major tuft dimension. The average major tuft dimension of the tufts of the improved unbonded loosefill insulation material is shorter than an average major tuft dimension of tufts of conventional unbonded loosefill insulation material, thereby providing the improved unbonded loosefill insulation material with a higher insulative value than conventional unbonded loosefill insulation material.