WO2015043931A1 - Method for evaluating the lubrication and/or friction of hair - Google Patents

Method for evaluating the lubrication and/or friction of hair Download PDF

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Publication number
WO2015043931A1
WO2015043931A1 PCT/EP2014/069047 EP2014069047W WO2015043931A1 WO 2015043931 A1 WO2015043931 A1 WO 2015043931A1 EP 2014069047 W EP2014069047 W EP 2014069047W WO 2015043931 A1 WO2015043931 A1 WO 2015043931A1
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WO
WIPO (PCT)
Prior art keywords
hair
bundle
hair fibres
fibres
personal care
Prior art date
Application number
PCT/EP2014/069047
Other languages
French (fr)
Inventor
David Andrew Ross Jones
Aurore Anabelle POLIDANO
Aneliya Nikolova Zdravkova
Original Assignee
Unilever Plc
Unilever N.V.
Conopco, Inc., D/B/A Unilever
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever Plc, Unilever N.V., Conopco, Inc., D/B/A Unilever filed Critical Unilever Plc
Publication of WO2015043931A1 publication Critical patent/WO2015043931A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/483—Physical analysis of biological material
    • G01N33/4833—Physical analysis of biological material of solid biological material, e.g. tissue samples, cell cultures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00—Investigating materials by mechanical methods
    • G01N19/02—Measuring coefficient of friction between materials

Definitions

  • the invention relates to a method for evaluating the lubrication and/or friction of hair.
  • the invention provides a method for evaluating the lubrication properties provided to human hair by a treatment material suitable for application to human hair, the method comprising:- i) selecting a first bundle of hair fibres having an upper and lower region;
  • a treatment material suitable for application to hair wherein the treatment material is selected from: sebum; artificial sebum; and, a personal care product, or one or more ingredients thereof;
  • the hair switch is washed, rinsed and allowed to dry.
  • the first bundle of hair fibres and if used, any subsequent bundles of hair fibres is provided by a hair switch.
  • the personal care product is a hair treatment product, preferably a shampoo, conditioner, post-wash or pre-wash hair treatment product or combinations thereof.
  • the personal care ingredient is selected from the group consisting of: silicone oils; natural sebum; fatty acids; triglycerides; cholesterol; squalene; oleyl oleate; myristyl myristate; mineral oil; cationic surfactant; glycerol; fatty alcohol; a vegetable oil such as soybean oil or sunflower seed oil; or a mixture thereof.
  • the angle that the first bundle of hair fibres is held is from 35° to 90°, preferably from 40° to 90°, more preferably from 45° to 90°.
  • a comparison is made to a second or further bundle of hair fibres treated in an identical fashion to the first bundle of hair fibres, but with a different treatment material suitable for application to hair, or a negative control such as water.
  • any comparison is made side by side.
  • the method is repeated, but the applied object that was applied to the first bundle of hair fibres is now swapped over and applied to the second or further bundles of hair fibres and vice versa.
  • the time taken for the applied object to fall along a present length of the bundle of hair fibres is recorded.
  • a video and/or digital media recording is taken of step iv).
  • the method of the invention provides a visually compelling evaluation of the lubrication and/or friction of hair that is treated with various treatment materials suitable for application to hair. Moreover the method allows easy comparison of different bundles of hair fires, treated with different hair treatment materials when the method is done side-by-side, or when the results of the method are recorded in video and/or digital media.
  • the method involves selecting a first bundle of hair fibres having an upper and lower region. These may be hair fibres that are still attached to a subject's head, or to a mannequin head, but are preferably provided by a hair switch. A hair switch is a convenient pre-bundled array of hair fibres. A second or further bundle of hair fibres may be used in the method, when for example comparisons are required.
  • Such comparisons may be undertaken side- by-side, or done individually and recorded using video and/or digital media and later compared.
  • the bundle of hair fibres is then treated with a treatment material suitable for application to hair.
  • the treatment material suitable for application to hair is selected from: sebum; an artificial sebum; a personal care product, or one or more ingredients thereof (which may suitably be an ingredient mixture).
  • Suitable personal care products are hair treatment products, preferably a shampoo, conditioner, post-wash or pre-wash hair treatment product or combinations thereof.
  • Suitable personal care ingredients are selected from the group consisting of: silicone oils; natural sebum; fatty acids; triglycerides; cholesterol; squalene; oleyl oleate; myristyl myristate; mineral oil; cationic surfactant; glycerol; fatty alcohol; a vegetable oil such as soybean oil or sunflower seed oil; or a mixture thereof.
  • the treated bundle of hair fibres may (but preferably) at this stage after treatment, be washed (with a shampoo), rinsed and allowed to dry. This can be done if one wishes to mimic the effects of the personal care product or one or more
  • the treated bundle of hair fibres is held at an angle of from 30° to 90° as measured from the horizontal so that the upper region of the bundle of hair fibres is raised relative to the lower region .
  • the angle is so that when an object is later applied to the hair, it will fall along the bundle of hair fibres from the upper region to the lower region under gravity.
  • the angle that the first bundle of hair fibres is held is from 35° to 90°, preferably from 40° to 90°, more preferably from 45° to 90°.
  • An object is placed onto the upper region of the bundle of hair fibres so that said object will fall along the first bundle of hair fibres to its lower region under gravity.
  • the applied object has a low weight and a high surface area so as to be able to glide along the surface of the bundle of hair fibres.
  • the applied object is selected from the group consisting of: paper, card, feather, leaf, and flower petal. If desired, the time taken for the applied object to fall along a present length of the bundle of hair fibres can be recorded, and thus compared with other experiments occurring earlier or later.
  • a preferred use for the evaluation method is to compare two or more bundles of hair treated with different treatment materials suitable for application to hair.
  • a comparison is made to a second or further bundle of hair fibres treated in an identical fashion to the first bundle of hair fibres, but with a different treatment material suitable for application to hair, or a negative control such as water.
  • a comparison of a negative control such as water against treatment using a treatment material suitable for application to hair can be useful to show the lubrication properties provided by the treatment material suitable for application to hair.
  • a treatment material suitable for application to hair e.g. a hair treatment product such as a shampoo or conditioner
  • the hair switches were then washed with a standard shampoo, rinsed and dried and held up at an angle of 90° to the horizontal.
  • Two pieces of paper ( ⁇ 10cm 2 in size) numbered 1 and 2 were placed at the top of the hair switch (one piece of paper each) and allowed to fall along the hair switch under gravity to the bottom of the hair switch.

Abstract

The invention relates to a method for evaluating the lubrication properties provided to human hair by a treatment material suitable for application to human hair, the method comprising the method comprising: i) selecting a first bundle of hair fibres having an upper and lower region; ii) treating the first bundle of hair fibres with a treatment material suitable for application to hair, wherein the treatment material is selected from: sebum; artificial sebum; and, a personal care product, or one or more ingredients thereof; iii) holding the treated first bundle of hair fibres an angle of from 30° to 90° as measured from the horizontal so that the upper region of the bundle of hair fibres is raised relative to the lower region; and, iv) placing an object selected from the group consisting of: paper, card, feather, leaf, and flower petal onto the upper region of the first bundle of hair fibres so that said object will fall along the first bundle of hair fibres to its lower region under gravity.

Description

METHOD FOR EVALUATING THE LUBRICATION AND/OR FRICTION OF
HAIR
TECHNICAL FIELD OF THE INVENTION
The invention relates to a method for evaluating the lubrication and/or friction of hair.
BACKGROUND TO THE INVENTION
Consumers understand that hair treatment products may lubricate the hair and reduce friction of the hair. However, there is a need for a simple visual method of evaluating the lubrication and/or friction of hair.
Summary of the Invention
The invention provides a method for evaluating the lubrication properties provided to human hair by a treatment material suitable for application to human hair, the method comprising:- i) selecting a first bundle of hair fibres having an upper and lower region;
ii) treating the first bundle of hair fibres with a treatment material suitable for application to hair wherein the treatment material is selected from: sebum; artificial sebum; and, a personal care product, or one or more ingredients thereof;
iii) holding the treated first bundle of hair fibres an angle of from 30° to 90° as measured from the horizontal so that the upper region of the bundle of hair fibres is raised relative to the lower region; and,
iv) placing an object selected from the group consisting of: paper, card, feather, leaf, and flower petal, onto the upper region of the first bundle of hair fibres so that said object will fall along the first bundle of hair fibres to its lower region under gravity.
Preferably after step ii), but before step iii) the hair switch is washed, rinsed and allowed to dry. Preferably the first bundle of hair fibres and if used, any subsequent bundles of hair fibres, is provided by a hair switch. Preferably the personal care product is a hair treatment product, preferably a shampoo, conditioner, post-wash or pre-wash hair treatment product or combinations thereof.
Preferably the personal care ingredient is selected from the group consisting of: silicone oils; natural sebum; fatty acids; triglycerides; cholesterol; squalene; oleyl oleate; myristyl myristate; mineral oil; cationic surfactant; glycerol; fatty alcohol; a vegetable oil such as soybean oil or sunflower seed oil; or a mixture thereof.
Preferably the angle that the first bundle of hair fibres is held is from 35° to 90°, preferably from 40° to 90°, more preferably from 45° to 90°.
Preferably a comparison is made to a second or further bundle of hair fibres treated in an identical fashion to the first bundle of hair fibres, but with a different treatment material suitable for application to hair, or a negative control such as water.
Preferably any comparison is made side by side.
Preferably in any side by side comparison, the method is repeated, but the applied object that was applied to the first bundle of hair fibres is now swapped over and applied to the second or further bundles of hair fibres and vice versa.
Preferably the time taken for the applied object to fall along a present length of the bundle of hair fibres is recorded.
Preferably a video and/or digital media recording is taken of step iv). Detailed Description of the Invention
The method of the invention provides a visually compelling evaluation of the lubrication and/or friction of hair that is treated with various treatment materials suitable for application to hair. Moreover the method allows easy comparison of different bundles of hair fires, treated with different hair treatment materials when the method is done side-by-side, or when the results of the method are recorded in video and/or digital media. The method involves selecting a first bundle of hair fibres having an upper and lower region. These may be hair fibres that are still attached to a subject's head, or to a mannequin head, but are preferably provided by a hair switch. A hair switch is a convenient pre-bundled array of hair fibres. A second or further bundle of hair fibres may be used in the method, when for example comparisons are required. Such comparisons may be undertaken side- by-side, or done individually and recorded using video and/or digital media and later compared. The bundle of hair fibres is then treated with a treatment material suitable for application to hair. The treatment material suitable for application to hair is selected from: sebum; an artificial sebum; a personal care product, or one or more ingredients thereof (which may suitably be an ingredient mixture). Suitable personal care products are hair treatment products, preferably a shampoo, conditioner, post-wash or pre-wash hair treatment product or combinations thereof.
Suitable personal care ingredients are selected from the group consisting of: silicone oils; natural sebum; fatty acids; triglycerides; cholesterol; squalene; oleyl oleate; myristyl myristate; mineral oil; cationic surfactant; glycerol; fatty alcohol; a vegetable oil such as soybean oil or sunflower seed oil; or a mixture thereof.
The treated bundle of hair fibres may (but preferably) at this stage after treatment, be washed (with a shampoo), rinsed and allowed to dry. This can be done if one wishes to mimic the effects of the personal care product or one or more
ingredients thereof in use by consumer in the normal course of use, who would normal apply the hair treatment product and subsequently wash it off, rinse and dry the hair. In this fashion, the lubrication/friction properties imbued by the treatment material suitable for application to hair can be evaluated and related to normal use by the consumer.
After treatment, in step iii), the treated bundle of hair fibres is held at an angle of from 30° to 90° as measured from the horizontal so that the upper region of the bundle of hair fibres is raised relative to the lower region . The angle is so that when an object is later applied to the hair, it will fall along the bundle of hair fibres from the upper region to the lower region under gravity.
Preferably the angle that the first bundle of hair fibres is held is from 35° to 90°, preferably from 40° to 90°, more preferably from 45° to 90°.
An object is placed onto the upper region of the bundle of hair fibres so that said object will fall along the first bundle of hair fibres to its lower region under gravity. Ideally the applied object has a low weight and a high surface area so as to be able to glide along the surface of the bundle of hair fibres.
The applied object is selected from the group consisting of: paper, card, feather, leaf, and flower petal. If desired, the time taken for the applied object to fall along a present length of the bundle of hair fibres can be recorded, and thus compared with other experiments occurring earlier or later. A preferred use for the evaluation method is to compare two or more bundles of hair treated with different treatment materials suitable for application to hair.
Preferably a comparison is made to a second or further bundle of hair fibres treated in an identical fashion to the first bundle of hair fibres, but with a different treatment material suitable for application to hair, or a negative control such as water.
A comparison of a negative control such as water against treatment using a treatment material suitable for application to hair (e.g. a hair treatment product such as a shampoo or conditioner), can be useful to show the lubrication properties provided by the treatment material suitable for application to hair.
Furthermore, comparisons can be made between different personal care products (or ingredients thereof), using this visual method.
An excellent visual demonstration is provided when the comparison between 2 or more hair bundles is made side by side, where both are treated together.
An even more striking visual evaluation can be seen using this side-by-side comparison method, if the applied object that was applied to the first bundle of hair fibres is now swapped over and applied to the second or further bundles of hair fibres and vice versa. This shows to the consumer that it is simply the lubrication of the hair fibres that is having the effect, with any effect of the applied object being shown to be not relevant. Side-by-side comparisons are not the only way in which a comparison can be made. For example wherein a video and/or digital media recording can be taken of step iv), and thus comparisons between evaluations taking place at different times can be carried out.
Examples
The invention will be illustrated by the following non-limiting examples showing the advantages of the invention. Example
2 identical hair switches from the same batch were selected; the first was treated with artificial sebum, and the second was not treated.
The constituents of artificial sebum are shown in table 1 :-
Table 1 - constituents of Artificial Sebum
Figure imgf000007_0001
The hair switches were then washed with a standard shampoo, rinsed and dried and held up at an angle of 90° to the horizontal. Two pieces of paper (~10cm2 in size) numbered 1 and 2 were placed at the top of the hair switch (one piece of paper each) and allowed to fall along the hair switch under gravity to the bottom of the hair switch.
It was clear that that the hair switch treated with artificial sebum provided much more lubricated hair (and thus reduced friction on the hair) because the piece of paper fell noticeably quicker, which was easily discernible visually in this case by eye.
The drop test was repeated, whereby paper 1 was placed on the other hair switch. The results were the same.
The same results were achieved using a different applied object, this time a flower petal. Similar results were achieved by variation of the angle that the hair switch was held. A shallower angle (down to 30°) can be used if the applied object falls too quickly.
These results show that this simple method can be used to provide a visual evaluation of the lubrication and/or friction properties of hair that is treated with a personal care product or ingredient thereof.

Claims

1 . A method for evaluating the lubrication properties provided to human hair by a treatment material suitable for application to human hair, the method comprising:- i) selecting a first bundle of hair fibres having an upper and lower
region;
ii) treating the first bundle of hair fibres with a treatment material
suitable for application to hair, wherein the treatment material is selected from: sebum; artificial sebum; and, a personal care product, or one or more ingredients thereof;
iii) holding the treated first bundle of hair fibres an angle of from 30° to 90° as measured from the horizontal so that the upper region of the bundle of hair fibres is raised relative to the lower region; and, iv) placing an object selected from the group consisting of: paper, card, feather, leaf, and flower petal, onto the upper region of the first bundle of hair fibres so that said object will fall along the first bundle of hair fibres to its lower region under gravity.
2. A method according to claim 1 , wherein after step ii), but before step iii) the hair switch is washed, rinsed and allowed to dry.
3. A method according to claim 1 or claim 2, wherein the first bundle of hair fibres and if used, any subsequent bundles of hair fibres, is provided by a hair switch.
4. A method according to any preceding claim, wherein the personal care
product is a hair treatment product, preferably a shampoo, conditioner, post- wash or pre-wash hair treatment product or combinations thereof.
5. A method according to any preceding claim, the personal care ingredient is selected from the group consisting of: silicone oils; natural sebum; fatty acids; triglycerides; cholesterol; squalene; oleyl oleate; myristyl myristate; mineral oil; cationic surfactant; glycerol; fatty alcohol; a vegetable oil such as soybean oil or sunflower seed oil; or a mixture thereof.
6. A method according to any preceding claim, wherein the angle that the first bundle of hair fibres is held is from 35° to 90°, preferably from 40° to 90°, more preferably from 45° to 90°.
7. A method according to any preceding claim, wherein a comparison is made to a second or further bundle of hair fibres treated in an identical fashion to the first bundle of hair fibres, but with a different personal care product, or an ingredient thereof, or a negative control such as water.
8. A method according to claim 7, wherein the comparison is made side by side.
9. A method according to claim 8, wherein the method is repeated, but the applied object that was applied to the first bundle of hair fibres is now swapped over and applied to the second or further bundles of hair fibres and vice versa.
10. A method according to any preceding claim, wherein the time taken for the applied object to fall along a present length of the bundle of hair fibres is recorded.
1 1 . A method according to any preceding claim, wherein a video and/or digital media recording is taken of step iv).
PCT/EP2014/069047 2013-09-25 2014-09-08 Method for evaluating the lubrication and/or friction of hair WO2015043931A1 (en)

Applications Claiming Priority (2)

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EP13186030 2013-09-25
EP13186030.6 2013-09-25

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018177849A1 (en) * 2017-03-29 2018-10-04 Unilever Plc Apparatus and method for measuring wet friction of hair
WO2018177850A1 (en) * 2017-03-29 2018-10-04 Unilever Plc Method for measuring wet friction of hair
US10159637B2 (en) 2016-06-10 2018-12-25 Clarity Cosmetics Inc. Non-comedogenic and non-acnegenic hair and scalp care formulations and method for use

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10159637B2 (en) 2016-06-10 2018-12-25 Clarity Cosmetics Inc. Non-comedogenic and non-acnegenic hair and scalp care formulations and method for use
US10813872B2 (en) 2016-06-10 2020-10-27 Clarity Cosmetics Inc. Hair and scalp formulations
US11160746B2 (en) 2016-06-10 2021-11-02 Clarity Cosmetics Inc. Non-comedogenic and non-acnegenic hair and scalp care formulations and method for use
WO2018177849A1 (en) * 2017-03-29 2018-10-04 Unilever Plc Apparatus and method for measuring wet friction of hair
WO2018177850A1 (en) * 2017-03-29 2018-10-04 Unilever Plc Method for measuring wet friction of hair
CN110520711A (en) * 2017-03-29 2019-11-29 荷兰联合利华有限公司 For measuring the device and method of hair wet friction
EA037634B1 (en) * 2017-03-29 2021-04-23 ЮНИЛЕВЕР АйПи ХОЛДИНГС Б.В. Apparatus and method for measuring wet friction of hair
EA037963B1 (en) * 2017-03-29 2021-06-16 ЮНИЛЕВЕР АйПи ХОЛДИНГС Б.В. Method for measuring wet friction of hair
US11105732B2 (en) 2017-03-29 2021-08-31 Conopco, Inc. Apparatus and method for measuring wet friction of hair
CN110520711B (en) * 2017-03-29 2022-05-17 联合利华知识产权控股有限公司 Device and method for measuring wet friction of hair
US11879831B2 (en) 2017-03-29 2024-01-23 Conopco, Inc. Method for measuring wet friction of hair

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