Flame Resistant Fabric Yarn Composition for Tear Strength and Comfort

Solution Overview

Problem

Existing flame-resistant fabrics face a challenge in balancing strength and durability with comfort, as fibers that enhance strength often compromise comfort, and vice versa.

Innovation Solution

Incorporating reinforcement yarns with a higher concentration of synthetic fibers strategically placed within the fabric structure, alongside body yarns with a high percentage of cellulosic fibers, to enhance tear strength and durability while maintaining comfort and flame resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If fibers that enhance strength and durability are used in flame resistant fabrics, then tensile and tear strength are improved, but comfort and flexibility deteriorate

Engineering Contradiction:

Improvetear strengthVSAvoidcomfort

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent applies local quality by creating distinct yarn types with different fiber compositions: reinforcement yarns containing high percentages of strong synthetic fibers (polyester, polypropylene) for strength, and body yarns containing high percentages of comfortable cellulosic fibers (cotton, rayon) for comfort. These different quality zones are woven together in the same fabric structure, allowing simultaneous achievement of both strength and comfort requirements

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs composite materials by combining synthetic fibers and cellulosic fibers in a blended yarn structure. The reinforcement yarns use composite blends of synthetic fibers for durability, while body yarns use composite blends of cellulosic fibers for comfort and flame resistance. This composite approach allows the fabric to exhibit both strong mechanical properties and comfortable wear characteristics

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If high percentage of cellulosic fibers is used for comfort and flame resistance, then comfort and flame-resistant performance are improved, but strength and durability deteriorate

Engineering Contradiction:

ImprovecomfortVSAvoidtear strength

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent segments the fabric structure into two functional components: reinforcement yarns that provide strength and durability, and body yarns that provide comfort and flame resistance. By separating these functions into distinct yarn types rather than using a uniform fiber blend throughout, the fabric achieves both comfort and strength without compromise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by creating distinct yarn types with different fiber compositions: reinforcement yarns containing high percentages of strong synthetic fibers (polyester, polypropylene) for strength, and body yarns containing high percentages of comfortable cellulosic fibers (cotton, rayon) for comfort. These different quality zones are woven together in the same fabric structure, allowing simultaneous achievement of both strength and comfort requirements

Inventive Principle:

Principle #3Local quality

3Strength

If non-FR synthetic fibers are increased to enhance strength, then tensile strength is improved, but flame-resistant performance deteriorates

Engineering Contradiction:

Improvetensile strengthVSAvoidflame resistance

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the strength function from the body yarns and concentrates it in separate reinforcement yarns. The body yarns are dedicated to flame resistance and comfort using high cellulosic fiber content, while the reinforcement yarns handle the strength requirement using synthetic fibers. This extraction allows non-FR synthetic fibers to be used without compromising overall flame-resistant performance

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies local quality by creating distinct yarn types with different fiber compositions: reinforcement yarns containing high percentages of strong synthetic fibers (polyester, polypropylene) for strength, and body yarns containing high percentages of comfortable cellulosic fibers (cotton, rayon) for comfort. These different quality zones are woven together in the same fabric structure, allowing simultaneous achievement of both strength and comfort requirements

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20260062859A1Reinforced Flame Resistant Fabrics

Publication Date: 2026.03.05 SOUTHERN MILLS INC

AI summary

Described are flame resistant fabrics having a warp direction, a weft direction, and a fabric weight. The flame resistant fabrics may include warp direction yarns and weft direction yarns, where the warp direction yarns include warp body yarns having a fiber blend of a wt. % of non-FR synthetic fibers and at least 60 wt. % cellulosic fibers; and the weft direction yarns include weft body yarns having a fiber blend of a wt. % of non-FR synthetic fibers and at least 60 wt. % cellulosic fibers and weft reinforcement yarns having a fiber blend of 30 wt. % to 100 wt. % non-FR synthetic fibers. The fiber blend of the weft reinforcement yarns may comprise at least two times the wt. % of non-FR synthetic fibers in the fiber blend of the weft body yarns.