Cyclodextrin Fragrance Complexes for Personal Care

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Solution Overview

Problem

Personal care products, such as absorbent articles and wipes, face challenges in minimizing fragrance perceptibility before release and preventing microbial growth and agglomeration, which can result in an undesirable grainy feel due to high moisture levels and inefficient fragrance complexing.

Innovation Solution

Incorporating cyclodextrin complexing material with a fragrance, where more than 90% of the fragrance is bound within cyclodextrin molecules, and maintaining low moisture levels (<20% by weight) to minimize perceptibility and agglomeration, while using spray drying techniques to produce particles with high complexation efficiency and low moisture content.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If high moisture levels are used in personal care products, then the product may feel comfortable on the body, but microbial growth and agglomeration increase causing a grainy feel

Engineering Contradiction:

Improvecomfort on bodyVSAvoidmicrobial growth and agglomeration

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent changes the moisture content parameter to less than 20% by weight, which reduces microbial growth and agglomeration while maintaining product functionality and comfort on the body

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses cyclodextrin complexes that can be easily manufactured and applied, providing effective fragrance complexing without requiring complex preservation systems

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Productivity

If fragrance is not well-complexed with cyclodextrin, then fragrance release is rapid, but fragrance perceptibility occurs before intended release

Engineering Contradiction:

Improvefragrance release rateVSAvoidpremature fragrance perceptibility

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the complexation efficiency parameter to greater than 90%, which ensures fragrance is bound within cyclodextrin molecules and released only when intended, preventing premature perceptibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses cyclodextrin molecules as intermediaries to bind and control the release of fragrance molecules, providing precise control over when and where fragrance is released

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If particles have high moisture levels, then particle formation is easier, but particles agglomerate causing grainy feel

Engineering Contradiction:

Improveparticle formationVSAvoidparticle uniformity and smoothness

Core Design Contradiction:

Ease of manufactureVSShape

Solution Approach 1:

The patent changes the moisture content parameter to less than 20% by weight, which prevents particle agglomeration and maintains smooth texture while still allowing effective particle formation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses spray drying technology to create particles that are formed efficiently and then stabilized through low moisture content, preventing subsequent agglomeration and maintaining product quality

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 effectively minimizes fragrance perceptibility before release, reduces the risk of microbial growth, and prevents a grainy feel by ensuring high fragrance complexation and low moisture levels, enhancing user experience and product quality.

Implementation Method 1

a plurality of particles that include a cyclodextrin complexing material and a fragrance material complexed with the same

Methodology Applied

Scientific EffectComplexation: Absorption (physical)

Implementation Method 2

The particles may be manufactured to provide a high level of complexing efficiency... using spray drying techniques to produce particles with high complexation efficiency and low moisture content

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentEP2114331B1Personal care product comprising cyclodextrin as frgrance-complexing material

Publication Date: 2017.06.21 PROCTER & GAMBLE CO

AI summary

Personal care products are provided. An exemplary personal care product includes a composition that is applied to the body or clothing, or an article applied against the body; a plurality of particles associated with the composition or a component of the article, the plurality of particles, at least some of the plurality of particles comprising a cyclodextrin complexing material and a first fragrance material, wherein the percent of the first fragrance material that is complexed with the cyclodextrin is greater than about 90%, so that the perceptibility of the first fragrance is minimized prior to its release; and a second fragrance material that is not complexed with the cyclodextrin and that is different from the first fragrance material, wherein the composition or article does not contain an antiperspirant active.