Polyolefin Carpet Coating for Non-Fraying Woven Edges
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional latex coating compounds, such as carboxylated SB and acrylate-based systems, exhibit incompatibility with polyolefin fibers, leading to weak associations and increased fraying in woven carpets, particularly when used with apolar polyolefin substrates.
Innovation Solution
Aqueous polyolefin dispersions comprising a base polymer, a stabilizing agent, and a wetting agent are applied as an adhesive layer to the woven carpet, providing improved yarn coverage and bonding to prevent fraying, while also eliminating the need for edge serging and enhancing stain resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional latex coating compounds (carboxylated SB or acrylate-based) are applied to polyolefin fibers, then the coating can be applied to the carpet, but weak associations occur between fibers and coating leading to increased fraying
Solution Approach 1:
The patent changes the chemical composition parameters of the coating compound by using polyolefin-based polymers instead of conventional latex, and by adjusting the molecular weight distribution (bimodal or multimodal) to optimize bonding strength and reduce fraying
Solution Approach 2:
The patent creates a composite coating system combining polyolefin-based polymer with specific additives (plasticizers, stabilizers, wetting agents) to achieve both strong bonding to polyolefin fibers and resistance to fraying, resolving the incompatibility between polar latex and apolar polyolefin substrates
2Reliability
If yarn coverage is increased to prevent fraying, then edge protection improves, but the degree of yarn coverage control becomes more complex requiring adjustment of multiple parameters
Solution Approach 1:
The patent simplifies the process by changing the fundamental coating composition to polyolefin-based systems that naturally provide optimal yarn coverage and fraying resistance without requiring complex adjustment of multiple parameters like wetting ability, viscosity, and applied dry coat weight
3Reliability
If polyolefin-based coating compounds are used to combat fraying problems, then bonding to polyolefin fibers improves, but the coating may affect carpet transparency and brightness
Solution Approach 1:
The patent optimizes the molecular weight distribution of the polyolefin-based polymer (using bimodal or multimodal distributions) to achieve a balance between bonding strength and optical properties, allowing the coating to provide fraying resistance while maintaining carpet transparency and brightness
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 results in non-fraying woven carpets with improved adhesive and cohesive bonding, transparency, and enhanced resistance to water and stains, allowing for easier recycling and maintaining carpet brightness without the Tyndall effect.
Implementation Method 1
a wetting agent, wherein the base polymer comprises a polyolefin-based polymer
Implementation Method 2
applying a coating compound as an adhesive layer to the woven carpet to form a coated woven carpet
Data Source
AI summary
A method of preparing a woven carpet comprising applying a coating compound as an adhesive layer to the woven carpet to form a coated woven carpet, wherein the coating compound comprises an aqueous dispersion comprising a base polymer, a stabilizing agent, and a liquid medium, wherein the base polymer comprises a polyolefin-based polymer; and a wetting agent. A woven carpet comprising a woven substrate; and an adhesive layer comprising a dehydration product of a coating compound comprising an aqueous dispersion comprising a base polymer, a stabilizing agent, and a liquid medium, wherein the base polymer comprises a polyolefin-based polymer; and a wetting agent.