Antibacterial Yarn Core Sheath Structure for Particle Capture

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Solution Overview

Problem

Conventional antibacterial yarns and fabrics struggle to effectively collect or remove fine particles such as bacteria, viruses, and pollen while maintaining air permeability and comfort, leading to compromised performance and user experience.

Innovation Solution

The development of an antibacterial yarn featuring a core yarn with functional polymers that generate charges by external energy, combined with a hygroscopic sheath yarn, which creates an electric field and attracts moisture to capture fine particles, thereby enhancing antibacterial efficacy and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fine synthetic fiber nonwoven fabric is used to improve fine particle collection, then air permeability is lowered, but comfort deteriorates

Engineering Contradiction:

Improvefine particle collection performanceVSAvoidcomfort during use

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention applies local quality by using piezoelectric fibers specifically in the core yarn to generate charges for particle collection, while the outer sheath uses hydrophilic fibers to manage moisture and provide comfort. This localized functional distribution allows the fabric to achieve superior fine particle collection without compromising overall comfort and air permeability.

Inventive Principle:

Principle #3Local quality

2Reliability

If piezoelectric fiber is used to generate charges for antibacterial effect, then antibacterial performance is improved, but the fiber itself may cause discomfort

Engineering Contradiction:

Improveantibacterial effectVSAvoidcomfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention employs a nested structure where piezoelectric fibers are placed in the core yarn, surrounded by a sheath of hydrophilic fibers. This nesting arrangement allows the piezoelectric core to generate antibacterial charges while the outer hydrophilic layer provides comfort by absorbing moisture and regulating humidity, thus hiding the potential discomfort of the piezoelectric material.

Inventive Principle:

Principle #7Nested doll (Nesting)

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 antibacterial yarn effectively collects and removes fine particles, exerts a bactericidal effect, and maintains high air permeability and comfort, providing superior performance and wearability.

Implementation Method 1

a core yarn including a functional polymer that generates a charge by external energy

Methodology Applied

Scientific EffectPhotoelectric effect: Photoelectric Effect

Implementation Method 2

a first sheath yarn higher in hygroscopicity than the core yarn, the first sheath yarn covering at least a part of the periphery of the core yarn

Methodology Applied

Scientific EffectHygroscopy: Absorption (physical)

Implementation Method 3

generates an electric field when the antibacterial yarn is brought between fibers or close to an object with a prescribed electric potential

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Data Source

PatentUS11326279B2Antibacterial yarn and antibacterial fabric

Publication Date: 2022.05.10 MURATA MFG CO LTD

AI summary

An antibacterial yarn that includes a core yarn including a functional polymer that generates a charge by external energy and a first sheath yarn higher in hygroscopicity than the core yarn, the first sheath yarn covering at least a part of a periphery of the core yarn across an axial direction of the core yarn.