Composite Yarn Core and Wrapping Structure for Low-Twist Strength
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Solution Overview
Problem
Existing low-twist yarn techniques result in yarns that are soft and fluffy but lack strength, and are limited in material selection, as they require specific fiber lengths and thicknesses, excluding short synthetic fibers and imposing economic burdens.
Innovation Solution
A composite yarn structure comprising a central yarn and wrapping fibers, where the wrapping fibers are combined with the central yarn in various states and directions, using a false twisting device to achieve a low-twist-high-strength yarn with flexible material selection, including short fibers of any length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If low-twist techniques are used to produce soft and fluffy yarns, then the yarn texture is improved, but the yarn strength deteriorates
Solution Approach 1:
The yarn is segmented into two functional components: a central core yarn that provides structural strength and a wrapping fiber layer that provides soft texture. This segmentation allows each component to be optimized independently - the core yarn can have higher twist for strength while the wrapping layer has low twist for softness, resolving the contradiction between texture and strength
Solution Approach 2:
The invention creates a composite yarn structure combining different fiber types and configurations - a core yarn (which can be twisted) and wrapping fibers (which remain loose and fluffy). This composite structure integrates the strength-providing twisted core with the texture-providing loose wrapping, simultaneously achieving both yarn strength and soft texture
2Shape
If existing low-twist techniques are used, then soft and fluffy yarns are produced, but the applicability to material selection is limited
Solution Approach 1:
The core yarn component serves multiple functions: it provides the structural framework for the yarn, delivers the necessary strength, and can accommodate various fiber types (natural, synthetic, regenerated) and lengths. This universal core structure enables the low-twist technique to be applied broadly across different material types, greatly enhancing material selection flexibility while maintaining soft texture
3Shape
If existing low-twist techniques are used, then soft yarns are produced, but the production cost increases due to material limitations
Solution Approach 1:
The invention changes the structural parameters of the yarn from a homogeneous low-twist structure to a heterogeneous composite structure with core and wrapping layers. This parameter change enables the use of cost-effective materials in the core yarn while maintaining the desired soft texture through the wrapping layer, thereby reducing production costs while achieving the target yarn texture
Data Source
AI summary
The present disclosure provides composite yarn, apparatus and methods preparing thereof. The composite yarn of the present disclosure includes wrapping fibers and a central yarn that is formed by a first body yarn and a second body yarn, wherein a portion of the wrapping fibers are combined with the central yarn in at least one of the following states: a first state, a portion of the wrapping fibers wrap around the first body yarn or the second body yarn; a second state, a portion of the wrapping fibers wrap around the first body yarn and the second body yarn respectively at the same time; a third state, a portion of the wrapping fibers wrap around the central yarn. The composite yarn of the present disclosure has low twist factor and high strength, which solves the problem of severe strength loss associated with low twist factors existing in conventional low-twist techniques.