Polyethylene Yarn Composition for Cool-Feeling Weaving Performance

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Solution Overview

Problem

Conventional high molecular weight polyethylene fibers, while providing high strength for cool feeling, suffer from poor weaving properties due to low elongation and flexibility, leading to poor fabric quality and wearability.

Innovation Solution

A polyethylene yarn with a polydispersity index of 5 to 20, strength of 1.5 to 10 g/d, and elongation of 10 to 50%, manufactured with specific molecular weight distribution and crystallinity, ensuring excellent thermal conductivity and weaving properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If high molecular weight polyethylene fiber is manufactured by maximizing crystallinity and orientation degree for cool feeling expression, then thermal conductivity is improved, but elongation decreases and weaving properties deteriorate

Engineering Contradiction:

Improvethermal conductivityVSAvoidelongation

Core Design Contradiction:

TemperatureVSStrength

Solution Approach 1:

The invention changes the molecular weight distribution parameters of the polyethylene resin, specifically controlling the polydispersity index to 20 or less and the weight average molecular weight to 100,000 g/mol or more. This parameter optimization allows the fiber to achieve both high crystallinity (60-90%) for thermal conductivity and sufficient elongation (15-40%) for weaving properties, resolving the contradiction between cool feeling and processability

Inventive Principle:

Principle #35Parameter changes

2Temperature

Engineering Contradiction:

Improvethermal conductivityVSAvoidfabric flexibility

Core Design Contradiction:

TemperatureVSEase of operation

Solution Approach 1:

By optimizing the polyethylene resin parameters (polydispersity index ≤20, weight average molecular weight ≥100,000 g/mol) and controlling the spinning process to achieve specific crystallinity (60-90%) and orientation degrees, the invention produces fibers that maintain high thermal conductivity while improving fabric flexibility and wearability. The controlled molecular weight distribution enables better fiber柔韧性 without sacrificing cool feeling properties

Inventive Principle:

Principle #35Parameter changes

3Temperature

If high molecular weight polyethylene fiber is manufactured by maximizing crystallinity and orientation degree for cool feeling expression, then thermal conductivity is improved, but weaving properties deteriorate due to low elongation

Engineering Contradiction:

Improvethermal conductivityVSAvoidweaving properties

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The invention optimizes the polyethylene resin parameters by controlling the polydispersity index to 20 or less and weight average molecular weight to 100,000 g/mol or more. This enables the fiber to achieve high crystallinity (60-90%) for thermal conductivity while maintaining elongation of 15-40% for good weaving properties, resolving the contradiction between cool feeling expression and ease of manufacturing

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite structure at the molecular level by controlling the polyethylene resin to have a specific molecular weight distribution with polydispersity index of 20 or less. This composite molecular structure allows different portions of the polymer chains to contribute differently - higher molecular weight portions provide crystallinity and thermal conductivity, while the controlled distribution ensures sufficient amorphous regions for elongation and weaving properties

Inventive Principle:

Principle #40Composite materials

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 yarn is woven into a fabric with low fluff occurrence frequency, providing excellent cool feeling and wearability, with improved drapability and reduced fabric defects.

Implementation Method 1

A cool feeling is imparted to a cool feeling fiber material by using thermal conductivity of the fiber itself

Methodology Applied

Scientific EffectThermal conductivity: Conduction (thermal)

Data Source

PatentUS12571134B2Polyethylene yarn with improved weaving properties and functional fabric including the same

Publication Date: 2026.03.10 KOLON INDUSTRIES INC

AI summary

Provided are a polyethylene yarn having improved weaving properties and a functional fabric including the same, and more particularly, a polyethylene yarn which may provide a user with an appropriate cool feeling and excellent wearability and allow manufacture of a fabric having a very low fluff occurrence frequency, and a functional fabric including the same are provided.The polyethylene yarn has a polydispersity index (PDI) of 5 or more and 20 or less, a strength of 1.5 to 10 g/d as measured according to ASTM D2256, and an elongation at maximum force of 10 to 50%.