Wool-Like Synthetic Yarn Using Air Texturizing for Lint-Free Carpets
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Solution Overview
Problem
Wool yarn for floor covering applications faces challenges such as animal rights concerns, health issues due to linting, non-recyclability, high cost, and susceptibility to pests, while synthetic alternatives lack the natural feel and texture of wool.
Innovation Solution
A method to manufacture a wool-like yarn from continuous filaments of polymer material, involving drawing and air texturizing to form threads with a core and a hairy sheath, and then twisting or cabling these threads to create a yarn with a weight greater than 2000 dtex, replicating the look, feel, and hairiness of wool yarn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wool yarn is used for floor covering applications, then natural bulk, softness, resiliency and thermal behaviour are achieved, but animal rights concerns arise and linting causes health issues
Solution Approach 1:
The patent creates a synthetic yarn that copies the hairy structure and physical properties of wool yarn through air texturizing, which forms a hairy sheath around core filaments, replicating wool's natural bulk, softness and resiliency without using animal fibres
Solution Approach 2:
The invention uses synthetic polymer filaments (polyester, polypropylene, nylon) that are inexpensive, non-linting and replaceable, eliminating the need for costly and problematic natural wool while maintaining the desired performance characteristics
2Reliability
If wool yarn is used for floor covering applications, then natural origin and hairy structure are achieved, but cost is considerably greater and susceptibility to pests is well known
Solution Approach 1:
The patent employs synthetic polymer filaments that are significantly cheaper than wool and resistant to pests, while the air texturizing process creates the hairy structure needed for natural appearance and feel
Solution Approach 2:
The invention changes the material parameter from natural wool fibres to synthetic polymer filaments, and uses air texturizing to transform the smooth synthetic filaments into a hairy structure that mimics wool's appearance and tactile properties
3Quantity of substance
If BCF yarn is used for floor covering applications, then continuous filament nature prevents linting and reduced price is achieved, but feel and texture similar to wool yarn cannot be provided
Solution Approach 1:
The patent applies different treatments to different parts of the yarn structure: core filaments remain relatively straight while overfed filaments are air texturized to create a hairy sheath, giving the yarn a wool-like appearance and feel while maintaining lint-free properties
Solution Approach 2:
The invention uses air texturizing technology, where air jets or air streams are used to entangle overfed filaments and form a hairy envelope around the core, providing the wool-like texture and appearance that conventional mechanical texturizing cannot achieve
4Reliability
If wool fibres are used in floor covering application, then natural bulk and softness are achieved, but loss of fibres causes respiratory issues
Solution Approach 1:
The patent copies wool's bulk and softness properties using synthetic filaments with air texturizing to create a hairy structure, eliminating the linting problem inherent in natural wool fibres
Solution Approach 2:
The invention uses synthetic polymer filaments that do not lint like natural wool, providing the same comfort and aesthetic properties without the health hazards of fibre loss
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 resulting yarn achieves a similar look, feel, and hairiness to wool yarn while overcoming the drawbacks of wool yarn, such as linting, improved recyclability, enhanced UV resistance, antistatic properties, and increased wear resistance.
Implementation Method 1
air jets or the like cause the overfed filaments to entangle with one another to form a woolly or hairy envelope or sheath around the core
Data Source
AI summary
A method of manufacturing a wool-like yarn from continuous filaments of polymer material comprises steps of: providing partially oriented, continuous filaments of the polymer; drawing and air texturizing the partially oriented filaments to form threads, wherein a first group of straight filaments forms a core of the thread and a second group of filaments are overfed with respect to the first group of filaments to form a hairy sheath; and twisting or cabling a plurality of the threads together to form the wool-like yarn to have a weight of greater than 2000 dtex. The resulting wool-like continuous filament yarn is intrinsically UV resistant, antistatic and recyclable.