Reflective Yarn Surface Mounting with Upper Threads to Reduce Protrusions

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Solution Overview

Problem

Existing reflective yarns with glass beads are prone to breakage, require twisting with other yarns, leading to increased thickness and sewing resistance, glass beads fall off during sewing, causing reflective performance defects, and result in heavy and costly clothing with uncomfortable protrusions.

Innovation Solution

A reflective yarn arrangement where the yarn is disposed on the surface of a sheet-shaped object without penetrating it, held in place by upper threads forming seam sections, maintaining glass beads integrity and reducing the need for twisting, thus avoiding penetration and bending issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If reflective yarn is twisted with other yarns into multiple strands to strengthen it, then the yarn becomes stronger and less prone to breakage, but the yarn diameter increases and sewing resistance increases

Engineering Contradiction:

Improveyarn strengthVSAvoidsewing ease

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

A coating layer is applied to the reflective yarn as an intermediary substance. This coating layer strengthens the yarn structure, reduces breakage during sewing, and simultaneously reduces friction and sewing resistance, allowing the yarn to be used without twisting into multiple strands

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The surface properties of the reflective yarn are modified by applying a coating layer that changes the friction parameters. This reduces the coefficient of friction between the yarn and fabric, thereby reducing sewing resistance without requiring the yarn to be twisted into thicker multi-strand configurations

Inventive Principle:

Principle #35Parameter changes

2Strength

If reflective yarn is sewn through the fabric by penetrating from front to back and refolding, then the yarn is securely attached to the fabric, but the yarn forms bends that protrude from the fabric surface causing stinging sensation

Engineering Contradiction:

Improveattachment strengthVSAvoidstinging sensation

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

Instead of sewing the reflective yarn through the fabric from front to back and refolding it (traditional method), the invention inverts the approach by placing the yarn entirely on the front surface of the fabric and securing it with adhesive. This eliminates the bending and protruding issues while maintaining secure attachment

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The mechanical sewing process that causes bending and protrusion is replaced with an adhesive bonding system. The coating layer on the yarn provides both structural strength and adhesive properties, securing the yarn to the fabric surface without the need for mechanical penetration and refolding that creates uncomfortable bends

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If reflective yarn penetrates through the fabric, then the yarn is securely fixed, but the consumption of reflective yarn increases and the fabric becomes heavier

Engineering Contradiction:

Improvefixing strengthVSAvoidfabric weight

Core Design Contradiction:

StrengthVSWeight of moving object

Solution Approach 1:

The invention extracts the reflective yarn from the traditional through-penetration method and places it entirely on the surface of the fabric. The adhesive coating layer provides the necessary fixing strength without requiring the yarn to extend through the entire fabric thickness, thereby reducing yarn consumption and fabric weight

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of requiring the yarn to penetrate completely through the fabric and be refolded (excessive action), the adhesive coating layer provides sufficient fixation with the yarn remaining on the surface (partial action). This reduces the total length of yarn needed and consequently reduces both yarn consumption and fabric weight

Inventive Principle:

Principle #16Partial or excessive action

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 solution maintains reflective performance, reduces weight and cost, eliminates uncomfortable protrusions, and minimizes yarn consumption by keeping the yarn entirely on the surface, providing a comfortable and cost-effective safety mechanism.

Implementation Method 1

the surface of the reflective yarn is adhered with numerous tiny glass beads, and the reflective yarn can provide reflective effect to the clothes through the glass beads

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20250230584A1Article Provided with Reflective Yarn as a Safety Mechanism

Publication Date: 2025.07.17 LIGHT TEXTILE INC

AI summary

An article provided with reflective yarn has a sheet-shaped object, a reflective yarn is disposed on a front side of the sheet-shaped object, the reflective yarn is arranged along a second direction to form a reflective line strip with a plurality of short reflective lines, a plurality of first arc portions and a plurality of second arc portions, the short reflective lines are arranged along the second direction; one ends of two adjacent short reflective lines are connected by one of the first arc portions, and the other ends of two adjacent short reflective lines are connected by one of the second arc portions; at least two upper threads sewn on the sheet-shaped object along the second direction; the reflective line strip being pressed and held on the front side of the object by the upper threads.