Cut-Resistant Yarn Structure with Composite Core Filaments
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing yarn structures lack sufficient cut resistance, particularly in garments used for protective applications, as they often rely on single materials or configurations that do not adequately address the need for enhanced resistance to cutting hazards.
Innovation Solution
A cut-resistant yarn structure is developed, comprising multiple cut-resistant core filaments made from materials like basalt, steel, or steel alloys, wrapped with core-spun yarns containing staple fibers such as polyester, polyethylene, or aramid, and additional covering layers for enhanced protection, which can include fire retardant materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If single material or simple configuration is used, then manufacturing is easier, but cut resistance is insufficient
Solution Approach 1:
The patent applies composite materials by combining multiple core filaments (steel, basalt, aramid) with covering yarns (polyester, polyethylene, aramid) to create a yarn structure that achieves superior cut resistance. The composite construction allows different materials to contribute their specific properties - steel and basalt provide core strength, while aramid and polyester coverings provide cut resistance and flexibility, collectively meeting ANSI A8-A9 standards
Solution Approach 2:
The yarn structure is segmented into distinct functional components: multiple core filaments (first, second, third core filaments) and multiple covering layers (first covering yarn, second covering yarn, additional covering layers). This segmentation allows each component to be optimized for its specific function while working together to achieve overall cut resistance, resolving the contradiction between complexity and performance
2Strength
If multiple materials and layers are combined, then cut resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent implements a nested structure where core filaments are surrounded by covering yarns, which are in turn surrounded by additional covering layers. The core-spun yarn construction nests staple fibers around a core filament, creating concentric layers. This nesting approach organizes multiple materials in a systematic hierarchy that, while complex, follows a predictable manufacturing sequence that can be integrated into existing yarn production equipment
Solution Approach 2:
The yarn structure achieves multi-functionality by incorporating materials that provide different properties: steel and basalt cores provide tensile strength, aramid and polyester coverings provide cut resistance and abrasion resistance, and the layered structure provides flexibility and comfort. This multi-functional design allows a single yarn to meet multiple performance requirements simultaneously, justifying the manufacturing complexity through enhanced product value
3Ease of operation
If core-spun yarn with staple fibers is used, then flexibility and comfort are improved, but cut resistance may be reduced
Solution Approach 1:
The patent applies local quality by assigning different materials to different locations within the yarn structure based on their specific properties. Steel and basalt core filaments provide structural strength at the center, while aramid and polyester staple fibers in the covering layers provide cut resistance and flexibility at the outer surfaces where contact with cutting hazards occurs. This localized material placement optimizes both cut resistance and comfort without compromising either property
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A cut resistant yarn structure and method of manufacturing such yarn structure are described. The cut-resistant yarn structure (200) includes a first cut-resistant core filament (202), a second cut-resistant core filament (204) and a first covering yarn (206) wound over the first and second cut-resistant core filaments. The first covering yarn includes a core-spun yarn in which staple fibers (212) are spun over a third cut-resistant core filament (210). The yarn structure also includes one or more covering layers (208) wound over the first covering yarn that may serve as the exterior layer for the cut-resistant yarn structure. In some instances, the first and second cut-resistant core filaments include a core-spun yarn in which staple fibers are spun over the first cut-resistant core filament and/or the second cut-resistant core filament.