Composite Yarn with Intermingled Elastic Bundles for Slippage Control

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Solution Overview

Problem

Elastic yarns used in high elasticity fabrics are prone to breakage and slippage, particularly during sewing, washing, and drying processes, leading to reduced fabric integrity and performance.

Innovation Solution

A composite yarn comprising at least two bundles of coalesced elastic filaments and a plurality of inelastic elements, interconnected via intermingling with a high number of entanglement points, ensuring the elastic bundles remain independent and resistant to stress.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a single bundle of coalesced elastane filaments is combined with inelastic polyester filaments to produce elastic yarns, then the yarn provides elasticity, but the yarn is prone to breakage and slippage during sewing and washing processes

Engineering Contradiction:

Improveyarn integrityVSAvoidresistance to breakage and slippage

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The elastic yarn is divided into multiple separate bundles of coalesced elastane filaments (at least two bundles) instead of using a single bundle. Each bundle functions as an independent elastic unit, so if one bundle breaks or slips, the other bundles continue to provide elasticity and structural integrity to the yarn.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention combines multiple elastic bundles with inelastic elements (polyester filaments or bundles) to create a composite yarn structure. The inelastic elements provide structural stability and prevent the elastic bundles from slipping, while the multiple elastic bundles maintain the yarn's elasticity and provide redundancy against breakage.

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If elastic filaments are coalesced into a single bundle to achieve desired yarn count, then the production process is simplified, but the yarn becomes vulnerable to complete failure when one bundle breaks

Engineering Contradiction:

Improveproduction process simplicityVSAvoidresistance to complete failure

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

Instead of producing one large bundle of coalesced filaments, the invention segments the elastic component into multiple smaller bundles that are combined later. This maintains manufacturing simplicity while providing redundancy - if one bundle fails, others continue to function, preventing complete yarn failure.

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If inelastic polyester filaments are added to elastic elastane filaments to create composite yarn, then the yarn structure is stabilized, but the elastic bundles can still slip during sewing and washing

Engineering Contradiction:

Improveyarn structure stabilityVSAvoidelastane slippage

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

By segmenting the elastic component into multiple separate bundles within the composite yarn, the invention reduces slippage. The inelastic elements act as anchors that restrict the movement of each individual elastic bundle, preventing them from slipping during sewing and washing processes.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP3956502B1A composite yarn comprising at least two bundles of coalesced elastic filaments and a plurality of inelastic elements and process for producing such yarn

Publication Date: 2025.10.29 SANKO TEKSTIL ISLETMELERI SANAYI VE TICARET AS

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AI summary

The present invention relates to a composite yarn (100) comprising at least two bundles of elastic filaments (101, 102) and a plurality of inelastic elements (103), wherein said bundles of elastic filaments (101, 102) comprise a plurality of elastic filaments (150) connected one to the other in a substantially continuous manner, each of said inelastic element (103) is chosen among an inelastic filament or a bundle of coupled inelastic filaments, said bundles of elastic filaments (101, 102) and said inelastic elements (103) are connected to each other by intermingling.