Non-woven Composite Office Panel Flame Retardance
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Solution Overview
Problem
Current office panel materials, particularly those using fiberglass, face health and environmental concerns due to manufacturing risks and recycling challenges, while also needing to meet stringent requirements for flame retardance, strength, stiffness, and acoustical properties.
Innovation Solution
A non-stratified, non-woven composite made of high denier strength-imparting fibers, lower denier binder fibers, and a small percentage of flame retardant fibers, all from the same polymeric material, such as polyester, which can be easily recycled and provides a smooth, stiff surface suitable for textile attachment, enhancing flame retardance, strength, stiffness, and sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fiberglass is used to enhance flame retardance, then flame spread index is reduced, but health and environmental issues arise
Solution Approach 1:
The patent removes fiberglass from the panel construction entirely, extracting the harmful substance while maintaining flame retardance through alternative means (Class A rated vinyl fabric and fire-retardant treated wood framing members), thus eliminating health and environmental issues associated with fiberglass exposure and disposal
Solution Approach 2:
The patent changes the material parameters by substituting fiberglass with fire-retardant treated wood and inherently flame-resistant vinyl fabric, achieving the same flame spread index reduction through different material properties and compositions
2Reliability
If fiberglass is used to meet flame retardance standards, then flame spread index is reduced, but recycling becomes difficult
Solution Approach 1:
The patent extracts fiberglass from the panel system, eliminating the material that prevents recycling. The resulting panel construction using vinyl fabric and wood framing members consists of recyclable materials that can be more easily recovered and reused at end of life
Solution Approach 2:
The patent creates a more homogeneous material composition by removing the mixed fiber content (fiberglass combined with organic fibers) and using uniform fire-retardant treated wood and vinyl fabric, which simplifies recycling processes and material recovery
3Strength
If high denier fibers are used to impart strength, then tensile strength is improved, but fiber orientation control becomes challenging
Solution Approach 1:
The patent applies different fiber deniers strategically in different locations and orientations within the batting structure, using high denier fibers (15-45 denier) for primary strength in specific directions and lower denier fibers (1-15 denier) for cross-directional support and bonding, achieving comprehensive strength with controlled orientation
Solution Approach 2:
The patent creates a composite fiber batting structure combining multiple fiber types with different deniers (1-45 denier range) to achieve synergistic effects, where high denier fibers provide structural strength and lower denier fibers provide bonding and cross-directional reinforcement, solving both strength and orientation control challenges
4Strength
If binder fibers are used to adhere composite together, then structural integrity is improved, but surface smoothness may be compromised
Solution Approach 1:
The patent concentrates binder fibers (lower denier 1-15 denier) at the surfaces and interfaces of the composite structure where they provide bonding and adhesion, while the interior contains primarily strength-imparting high denier fibers, thus achieving structural integrity through localized bonding without compromising the smooth surface appearance
Solution Approach 2:
The patent uses the vinyl fabric facing as a thin film shell that provides a smooth surface finish, while the fiber batting interior provides structural integrity through binder fiber adhesion, separating the surface aesthetic function from the structural bonding function
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 composite meets Class A flammability standards, offers improved strength and stiffness, and excellent sound absorption, while being recyclable and environmentally friendly, reducing the need for fiberglass and its associated issues.
Implementation Method 1
binder fibers of a lower denier that adhere the composite together
Implementation Method 2
excellent sound absorption
Data Source
AI summary
Provided herein is a non-stratified, or homogeneous, non-woven composite having (a) strength-imparting fibers of a relatively high denier and (b) binder fibers of a lower denier that adhere the composite together and that form a smooth, stiff skin on the outer surfaces of the composite. In one instance, the strength-imparting fibers are staple fibers and the binder fibers are bicomponent fibers having a low melt component. In a variation, the composite also contains a small percentage by weight (that is, less than 20%) of flame retardant fibers that impart flame resistant properties to the composite. Preferably, all of the fibers are comprised of the same polymeric material (e.g., polyester), so that the composite is recyclable. The resulting composite exhibits excellent flame retardance, strength, and stiffness, as well as having a smooth surface for attachment of a decorative fabric or other material. A process for manufacturing such composites is also provided.