Fiber-Reinforced Carpet Backing for Stable and Recyclable Flooring
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Solution Overview
Problem
The textile floor covering industry faces challenges with stability, installation, and recycling due to issues with backing materials, such as jute expansion, PVC backing migration, and the complexity of multi-layered constructions, leading to problems like curling, cupping, and high production costs.
Innovation Solution
A dimensionally stable floor covering with a universal fiber-reinforced polymer backing system, comprising a tufted textile substrate and a reinforcement layer with an adhesive composition and fibers, which provides stability and facilitates recycling by using a hot water-soluble adhesive for easy separation of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a multi-layered backing system with jute and synthetic materials is used to improve stability, then dimensional stability is improved, but the construction complexity and production cost increase
Solution Approach 1:
The patent applies composite materials by combining natural fiber reinforcement (jute or other cellulosic fibers) with thermoplastic polymer adhesive (polypropylene) to create a unified backing layer that provides both dimensional stability and structural integrity. This composite approach replaces the need for separate synthetic backing layers while maintaining stability.
Solution Approach 2:
The thermoplastic polymer adhesive serves multiple functions simultaneously: it acts as the binding agent for the reinforcement fibers, provides dimensional stability, serves as the secondary backing substrate, and enables heat-based installation methods. This multi-functionality eliminates the need for separate components.
2Strength
If hot-melt adhesive is used for seam taping to join carpet panels, then seam strength is improved, but installation time and difficulty increase due to heating requirements and shrinkage
Solution Approach 1:
The patent changes the thermal parameters of the backing material by selecting a thermoplastic polymer with a melting point suitable for standard heat sealing equipment. This allows seam taping to be performed at controlled temperatures that prevent excessive shrinkage while maintaining adequate sealing strength, reducing installation time and difficulty.
3Stability of the object's composition
If traditional multi-layered backing construction is used, then stability is improved, but recyclability deteriorates due to difficulty in separating components
Solution Approach 1:
The patent creates a composite material system where natural fibers are embedded in a thermoplastic polymer matrix. This structure maintains stability during use but allows for relatively easy separation during recycling through mechanical or thermal processes, as the thermoplastic can be melted and the fibers recovered.
Solution Approach 2:
The use of thermoplastic polymer as the adhesive and backing material enables recyclability through parameter changes - specifically, heating the material to its melting point allows for separation and reprocessing of the components, transforming the stable installed state into a recyclable state.
4Strength
If PVC backing is used to provide stability and durability, then strength and durability are improved, but environmental harm increases due to plasticizer migration and environmental persistence
Solution Approach 1:
The patent changes the chemical composition parameters by replacing PVC with thermoplastic polypropylene, which has superior recyclability and environmental compatibility. The thermoplastic properties provide adequate durability while eliminating the harmful plasticizer migration associated with PVC.
Solution Approach 2:
The composite of thermoplastic polymer and natural fiber reinforcement provides the necessary durability and strength without the environmental harms of PVC. The natural fiber component further reduces environmental impact while maintaining structural integrity.
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 stability, reduced production costs, and enhanced recyclability, allowing for flexible installation methods and the use of the same backing system for both broadloom and modular products, while minimizing waste and environmental impact.
Implementation Method 1
The reinforcement layer includes an adhesive composition and a plurality of fibers, wherein the fibers are encased by the adhesive composition
Implementation Method 2
the adhesive composition is dissolvable in hot water or steam... conveying the floor covering through a steam chamber, in which the floor covering is exposed to steam... directing high pressure streams of steam from a plurality of steam nozzles toward the reinforcement layer
Data Source
AI summary
A dimensionally stable floor covering comprises a tufted textile substrate and a reinforcement layer attached to the textile substrate. The reinforcement layer includes an adhesive backing compound and reinforcement fibers surrounded by the adhesive backing. The fibers may form a continuous layer on the back side of the floor covering or may be dispersed within the adhesive backing compound. The adhesive backing compound may be hot water-soluble to facilitate recycling of the floor covering. The floor covering may optionally include additional backing layers (including cushions) and may be used as a broadloom carpet, a carpet tile, or other modular floor covering products. Methods of manufacturing, installing, and recycling the present floor coverings are also provided.