Aqueous Yarn Coating Composition for Opacity and Glare Control

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Solution Overview

Problem

Existing yarns and textiles lack sufficient opacity and light scattering properties, leading to glare issues, and conventional coatings are not environmentally friendly.

Innovation Solution

An aqueous composition comprising porous particles, a film-forming binder material with a low glass transition temperature, and a non-abrasive inorganic filler is applied coaxially over a yarn core to enhance opacity and glare control, using a water-based binder for environmental safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional plastisol or polymeric coatings are used to clad yarn cores, then durability and dimensional stability are improved, but environmental friendliness deteriorates due to solvent-based formulations

Engineering Contradiction:
ImprovedurabilityVSAvoidenvironmental friendliness
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention changes the fundamental parameter of the coating formulation from solvent-based plastisol to water-based acrylic polymer emulsion. This parameter change maintains the film-forming and protective properties while eliminating harmful solvents, thus improving environmental friendliness without sacrificing durability

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The invention substitutes the chemical mechanism of plastisol (polyvinyl chloride-based) with an acrylic polymer emulsion system. This substitution replaces the harmful chemical composition with a water-based alternative that achieves similar coating performance through different chemical mechanisms, resolving the environmental contradiction

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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 coated yarns exhibit increased opacity and reduced glare, providing improved visual appearance and environmental safety through the use of an aqueous composition that enhances light scattering and heat control properties.

Implementation Method 1

provides greater opacity and light scattering at the yarn level and for reducing glare of the final woven fabric

Methodology Applied
Scientific EffectLight scattering: Scattering

Implementation Method 2

a film-forming binder material having a Tg of less than or equal to 25°C

Methodology Applied
Scientific EffectFilm formation:

Data Source

PatentEP3887456B1Aqueous composition for making yarns and fabrics
Publication Date: 2025.07.02 EASTMAN KODAK CO
  • EP3887456B1 patent drawing

AI summary

An aqueous composition is used to clad yarn cores to provide coated yarns that can be woven into fabric substrates. This aqueous composition contains: (i) porous particles present in an amount of at least 2 weight % and up to and including 10 weight %, each porous particle comprising a continuous polymeric phase and discrete pores dispersed within the continuous polymeric phase, the porous particles having a mode particle size of 2-50 pm; (ii) a film-forming binder material having a Tg of less than or equal to 25°C, that is present in an amount of 25-60 weight %; (iii) an inorganic filler material having a value of less than 5 on the MOHS scale of mineral hardness, in an amount of at least 2-15 weight %; and (iv) an aqueous medium in an amount of at least 35 weight % in which the film-forming binder material is soluble or dispersible.