Auxetic Textile Structures for Cut-Resistant Protective Garments

Solution Overview

Problem

Existing textile materials for protective garments lack the combination of cut-resistance and flexibility, often resulting in garments that are either too rigid for comfort or insufficiently protective.

Innovation Solution

The development of an auxetic textile structure featuring a layer with high performance yarns and dispersed elastic portions, forming double layer structures that provide cut-resistance while maintaining flexibility and comfort.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high performance yarns are used to provide cut-resistance, then protective capability is improved, but flexibility and comfort deteriorate

Engineering Contradiction:

Improvecut-resistanceVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The textile structure is divided into multiple layers including an auxetic layer with high performance yarns for cut-resistance and separate elastic portions with elastic yarns for flexibility. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between protection and comfort

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention combines different material types (high performance yarns and elastic yarns) into a composite textile structure. The auxetic layer provides cut-resistance while the elastic portions provide stretch and recovery, creating a composite material system that achieves both protection and flexibility simultaneously

Inventive Principle:

Principle #40Composite materials

2Reliability

If high performance yarns are used to provide cut-resistance, then protective capability is improved, but comfort deteriorates

Engineering Contradiction:

Improvecut-resistanceVSAvoidcomfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The textile structure is divided into multiple layers including an auxetic layer with high performance yarns for cut-resistance and separate elastic portions with elastic yarns for flexibility. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between protection and comfort

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention combines different material types (high performance yarns and elastic yarns) into a composite textile structure. The auxetic layer provides cut-resistance while the elastic portions provide stretch and recovery, creating a composite material system that achieves both protection and comfort simultaneously

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If elastic portions are added to improve flexibility, then comfort is improved, but structural complexity increases

Engineering Contradiction:

ImproveflexibilityVSAvoidstructural complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The elastic portions are integrated directly into the auxetic layer through coupling mechanisms, merging the protective and flexible functions into a single unified structure. This reduces overall structural complexity compared to using separate protective and flexible layers

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The textile structure is designed so that the same composite material system provides multiple functions: cut-resistance from the high performance yarns and flexibility from the elastic yarns. This multi-functionality reduces the need for additional separate components, simplifying the overall structure

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 auxetic textile structure enhances the fit, comfort, flexibility, and dexterity of protective garments while maintaining effective cut-resistance, even under stress and upon removal of stress.

Implementation Method 1

an auxetic layer comprising a plurality of cut-resistant yarns

Methodology Applied

Scientific EffectCut-resistance:

Implementation Method 2

a plurality of dispersed elastic portions, each of the dispersed elastic portions comprising a plurality of elastic yarns

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 3

the plurality of dispersed elastic portions may be configured to return the auxetic textile structure to the first state after the external stress is removed

Methodology Applied

Scientific EffectElastic Recovery: Elastic Recovery

Implementation Method 4

an auxetic layer having an inner surface and an outer surface... the plurality of dispersed elastic portions in combination with the auxetic layer may form a plurality of double layer structures

Methodology Applied

Scientific EffectAuxetic effect: Auxetic Materials

Data Source

PatentEP4338633B1Auxetic textile structures

Publication Date: 2025.04.30 HONEYWELL SAFETY PRODUCTS USA INC

Figure 1A
Figure 1B
Figure 1C

AI summary

Apparatuses are described that provide for auxetic textile structures. An example auxetic textile structure includes an auxetic layer having an inner surface and an outer surface, wherein the auxetic layer comprises a plurality of high performance yarns. The auxetic textile structure further includes a plurality of dispersed elastic portions at least partially coupled to the inner surface of the auxetic layer, wherein the plurality of dispersed elastic portions in combination with the auxetic layer form a plurality of double layer structures distributed amongst a single layer of the auxetic layer. Each of the dispersed elastic portions comprises a plurality of elastic yarns.