Compressible Fiber Floor Lift Layer for Rigidity and Insulation
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Solution Overview
Problem
Existing floor lift layers made of plywood, cork, or rubber are heavy, provide minimal sound reduction and thermal insulation, and can create gaps between thinner and thicker floor coverings, leading to trip hazards and aesthetic issues.
Innovation Solution
A fiber structure floor lift layer composed of a substrate fiber bound by a thermoplastic binder fiber, with specific fiber compositions and properties that provide rigidity, sound insulation, and thermal insulation, and can be compressed to fit within gaps, eliminating the need for additional underlayment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional materials (plywood, cork, rubber) are used for floor lift layers, then structural support is provided, but the layers become heavy and provide minimal sound reduction and thermal insulation
Solution Approach 1:
The floor lift layer uses a composite structure combining a foam core layer with a fiber mat layer. The foam core provides lightweight structural support and rigidity, while the fiber mat layer enhances compression resistance and provides sound absorption. This composite approach achieves adequate structural support with significantly reduced weight compared to traditional solid materials like plywood.
2Strength
If traditional materials (plywood, cork, rubber) are used for floor lift layers, then structural support is provided, but sound reduction and thermal insulation are minimal
Solution Approach 1:
The foam core layer utilizes a porous cellular structure that traps air pockets, providing effective sound absorption and thermal insulation. The porous structure dissipates sound energy through friction and converts it to heat, while the trapped air pockets reduce thermal conductivity, achieving both sound reduction and thermal insulation functions.
Solution Approach 2:
The combination of foam core and fiber mat creates a multi-functional composite material that simultaneously provides structural support, sound absorption, and thermal insulation. The fiber mat layer adds sound absorption capabilities while the foam core provides both structural integrity and thermal insulation properties.
3Strength
If floor lift layers are made rigid to avoid damage to floor covering, then they cannot be compressed to reduce thickness during installation
Solution Approach 1:
The floor lift layer exhibits dynamic mechanical properties, being compressible during installation to fit into available space, then maintaining rigid structural support during normal use. The foam core's cellular structure allows compression during installation, while the fiber mat layer and foam recovery provide ongoing structural support and floor covering protection.
4Object-affected harmful factors
If thicker floor lift layers are used to eliminate gaps between floor covering and wall trim, then trip hazards are reduced, but the overall floor thickness increases
Solution Approach 1:
The compressible nature of the foam core allows the floor lift layer to be installed at a reduced thickness, then expand to provide adequate height for eliminating gaps between the floor covering and wall trim, achieving trip hazard elimination without permanently increasing floor thickness.
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 offers improved sound reduction, thermal insulation, and rigidity while being lighter and more compressible than traditional materials, eliminating trip hazards and gaps between floor coverings and wall trim, with specific properties such as compression resistance and R-value within defined ranges.
Implementation Method 1
a thermoplastic binder fiber... bound together by a thermoplastic binder fiber
Implementation Method 2
the floor lift layer is sufficiently rigid to avoid damage to the floor covering due to the floor lift layer compressing under the pressure of normal use, and the floor lift layer is compressible to reduce a thickness thereof during installation
Implementation Method 3
provide sound reduction
Implementation Method 4
provide thermal insulation... has an R-value within a range from 3.5 to 4 per inch (in.)
Data Source
AI summary
A floor structure includes a subfloor, a floor covering disposed above the subfloor, and a floor lift layer disposed between the subfloor and the floor covering. The floor covering is disposed above the subfloor. The floor lift layer is a fiber structure that includes a substrate fiber bound together by a thermoplastic binder fiber. The thermoplastic binder fiber makes up between 25 percent (%) and 35% by weight of the floor lift layer.