Multi-Component Elastic Yarn with Adjustable Drafting
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Solution Overview
Problem
Conventional ring-spun elastic yarns have high hairiness and low strength, which fail to meet the requirements of advanced weaving technologies, particularly shuttleless looms, affecting the surface smoothness and fiber strength utilization in textile manufacturing.
Innovation Solution
A multi-component elastic yarn is developed, comprising two sets of fibrous roving and two sets of core filaments, which are twisted together to form a composite yarn with adjustable draft ratios and weight percentages, using a modified ring-spinning machine with adjustable guides and tension control, resulting in a smooth, high-strength yarn with low hairiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional ring-spun elastic yarn is used, then production process is simple, but yarn has high hairiness and low strength
Solution Approach 1:
The yarn is divided into multiple components: two sets of fibrous roving and two sets of core filaments are twisted together to form a composite structure. This segmentation allows each component to contribute specific properties, resulting in high strength while maintaining manufacturability through a modified but systematic spinning process.
Solution Approach 2:
The invention creates a composite yarn structure by combining different types of filaments (elastic, low-elastic, and inelastic) with fibrous roving. This composite approach enables the yarn to achieve superior strength and elastic properties while the drafting mechanism controls hairiness through differential drafting ratios.
2Manufacturing precision
If conventional ring-spun elastic yarn is used, then manufacturing process is simple, but surface smoothness is poor
Solution Approach 1:
The invention employs dynamic control of the drafting process with adjustable drafting ratios for different filament sets. The elastic filaments are drafted at higher ratios (1.5-4.5) while inelastic filaments use lower ratios (1.0-1.3), creating a balanced tension system that produces smooth yarn surface. The modified ring-spinning machine incorporates adjustable guides and tension controls to dynamically manage this multi-component drafting process.
3Strength
If conventional ring-spun elastic yarn is used, then production capacity is adequate, but fiber strength utilization is low
Solution Approach 1:
The invention optimizes production by adjusting key parameters: drafting ratios are precisely controlled (1.0-1.3 for inelastic, 1.5-4.5 for elastic), and core filament weight percentage is set at 4%-50% of total yarn weight. These parameter optimizations maximize fiber strength utilization while the modified ring-spinning machine maintains high production capacity through efficient multi-component processing.
4Strength
If multi-component elastic yarn with two sets of fibrous roving and two sets of core filaments is produced, then yarn strength and surface smoothness are improved, but manufacturing process becomes more complex
Solution Approach 1:
The modified ring-spinning machine is designed with multi-functionality to handle the complex multi-component yarn production. It integrates drafting mechanisms for different filament types, adjustable guides, and tension controls within a single apparatus, making the complex manufacturing process manageable and adaptable to different yarn specifications.
Solution Approach 2:
The invention adds organizational dimension to the spinning process by systematically arranging two sets of fibrous roving and two sets of core filaments in a structured composite configuration. This dimensional organization of multiple components allows the complex apparatus to produce highly structured yarn with optimized strength and smoothness properties.
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 multi-component yarn achieves a smooth surface, low hairiness, high strength, and good wearing resistance, with improved tensile and tear strength, and a soft hand feeling, suitable for various textile fabrics, and the manufacturing apparatus is cost-effective and adaptable to changing market demands.
Implementation Method 1
the two sets of core filaments comprises elastic, low-elastic or inelastic filaments or a combination thereof
Data Source
AI summary
The invention discloses a multi-component elastic yarn comprises two fiber rovings and two core filaments, wherein each core filaments is elastic, low-elastic or inelastic filaments or any combination thereof. The invention also discloses preparation method and apparatus. The multi-component elastic yarn of the present invention is featured by smooth surface, low hairiness, fiber does not falling off easily, high strength and good wearing resistance. The textile fabrics made from the present yarn have a smooth surface, low hairiness, good wearing resistance, high tensile and tear strength, soft and smooth hand feeling and high elastic recovery rate. The apparatus of the present invention has strong applicability, is easy to maintain and high cost-effective.