Polyamide Cosmetic Fiber With Embedded Nanoparticles for Sustained Release

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Solution Overview

Problem

Existing textile fibers with cosmetic active ingredients suffer from low effectiveness and durability as these ingredients are only surface-bound and gradually released, leading to inadequate cosmetic effects.

Innovation Solution

Development of polyamide-based textile fibers with hyaluronic acid-conjugated gold and PEG-conjugated platinum nanoparticles homogeneously distributed throughout the fiber, which are incorporated using a method involving a masterbatch preparation and extrusion process, ensuring high temperature stability and uniform distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If active ingredient is added to fiber surface after manufacturing, then cosmetic properties are conferred to fiber, but effectiveness and durability of cosmetic effect are low

Engineering Contradiction:

Improveeffectiveness and durability of cosmetic effectVSAvoidmethod of incorporating active ingredient

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The active ingredient (nanoparticles) is incorporated into the fiber during the manufacturing process rather than being added afterward. The nanoparticles are mixed with the polyamide melt before extrusion, ensuring they are embedded within the fiber structure from the beginning, which guarantees both effectiveness and durability of the cosmetic effect

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The manufacturing process of the fiber and the incorporation of the active ingredient are merged into a single step. The nanoparticles are combined with the polyamide material during extrusion, creating an integrated structure where the active ingredient is distributed throughout the fiber rather than being merely surface-bound

Inventive Principle:

Principle #5Merging (Combining)

2Quantity of substance

If active ingredient is bound only to surface of fiber, then fiber has cosmetic properties, but release of active ingredient is gradual and insufficient

Engineering Contradiction:

Improveamount of active ingredient releasedVSAvoidduration of cosmetic effect

Core Design Contradiction:

Quantity of substanceVSDuration of action of moving object

Solution Approach 1:

The fiber structure incorporates nanoparticles within its matrix, creating a distributed network of active ingredient throughout the fiber volume. This internal distribution allows for sustained release as the nanoparticles gradually migrate to and from the fiber surface during wear, providing both adequate quantity and extended duration of cosmetic effect

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The nanoparticles are nested within the fiber structure during manufacturing, with the active ingredient embedded in the polyamide matrix. This nested configuration allows the fiber to act as a reservoir, continuously supplying the cosmetic active ingredient to the skin over an extended period rather than releasing it all at once or requiring frequent reapplication

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If nanoparticles are incorporated during fiber manufacturing, then effectiveness and durability of cosmetic effect are improved, but manufacturing process complexity increases

Engineering Contradiction:

Improveeffectiveness and durability of cosmetic effectVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The extrusion process serves dual functions: it manufactures the polyamide fiber while simultaneously incorporating the nanoparticle active ingredient throughout the fiber structure. This multi-functionality eliminates the need for separate steps to add the cosmetic ingredient, maintaining manufacturing simplicity while achieving superior cosmetic effectiveness and durability

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 fibers provide enhanced antioxidant, hydrating, and anti-aging effects due to sustained release of nanoparticles, with demonstrated increased skin hydration and antioxidant levels comparable to positive controls, and proven safety through clinical trials.

Implementation Method 1

The conjugated nanoparticles useful for putting the present invention into practice withstand these high temperatures of the method for obtaining textile fibers without degrading

Methodology Applied

Scientific EffectThermal stability:

Implementation Method 2

The textile fiber of the invention has cosmetic properties and, in particular, has antioxidant, hydrating and/or firming properties

Methodology Applied

Scientific EffectHydration:

Implementation Method 3

said nanoparticles being incorporated in said fiber in an amount of from 1 to 30 ppm and, in particular, of from 5 to 15 ppm

Methodology Applied

Scientific EffectSustained release:

Data Source

PatentEP2606174B1Cosmetic textile fiber, method for obtaining it and use thereof

Publication Date: 2014.12.10 НИЛЬСТАР С А

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AI summary

The present invention describes a polyamide textile fiber comprising conjugated nanoparticles homogeneously dispersed in the fiber, selected from polyethylene glycol-conjugated platinum nanoparticles, hyaluronic acid- conjugated gold nanoparticles and mixtures thereof. The invention also describes how to obtain it as well as its use in a cosmetic skin treatment as a system for the release of said conjugated nanoparticles.