PROCESS FOR TREATING HAIR FIBRES

Abstract

The invention relates to a process for treating hair fibres, comprising (i) combing the hair fibres, (ii) applying a composition to the hair fibres, (iii) treating the hair fibres by applying steam, (iv) heat-treating the hair fibres by conduction and/or radiation, step (i) being carried out before step (ii).

Claims

1. A process for treating hair fibres, comprising: (i) combing the hair fibres, (ii) applying a composition to the hair fibres, (iii) treating the hair fibres by applying steam, (iv) heat-treating the hair fibres by conduction and/or radiation, wherein the combing (i) is carried out before the applying (ii).

2. The process according to claim 1, which is free of any combing step after the applying (ii) within a period of 15 s.

3. The process according to claim 1, comprising a single combing step.

4. A process for treating hair fibres, comprising: (i) a single step of combing the hair fibres, (ii) applying a composition to the hair fibres, (iv) heat-treating the hair fibres, wherein the combing (i) is carried out before the applying (ii).

5. The process according to claim 4, comprising (iii) treating the hair fibres by applying steam.

6. The process according to claim 1, wherein the treating (iii) is carried out after the applying (ii) and before the heat-treating (iv).

7. The process according to claim 1, wherein the combing (i) is carried out for less than 5 min before the applying (ii).

8. The process according to claim 1, wherein the heat-treating (iv) is carried out after the applying (ii).

9. The process according to claim 1, wherein steps of the process are carried out by at least two different tools.

10. The process according to claim 1, wherein the combing (i) and the applying (ii) are carried out using a single tool.

11. The process according to claim 1, wherein steps of the process are carried out using a single tool.

12. The process according to claim 9, wherein steps of the process are carried out by moving the tools along a lock of hair fibres.

13. The process according to claim 1, the heat treatment (iv) being carried out by contact of the hair fibres with hot surfaces.

14. The process according to claim 1, the heat treatment (iv) being carried out at a temperature of 90? C. to less than 230? C.

15. The process according to claim 1, wherein the composition is in the fluid state during the application (ii).

16. The process according to claim 6, wherein the treating (iii) is carried out less than 5 min before the heat-treating (iv) and after the applying (ii).

17. The process according to claim 8, wherein the heat-treating (iv) is carried out less than 5 min after the applying (ii).

18. The process according to claim 11, wherein the single tool is a device for shaping the head of hair configured to carry out process steps successively in the same portion of hair fibres.

Description

[0046] The invention will be better understood from reading the following detailed description of non-limiting exemplary embodiments thereof and from examining the appended drawing, in which:

[0047] FIG. 1 is a diagram illustrating an exemplary embodiment of the process according to the invention,

[0048] FIG. 2 is a graph obtained according to Example 1 described hereinafter,

[0049] FIG. 3 represents four locks of hair according to Example 2 described hereinafter, and

[0050] FIG. 4 represents a graph obtained according to Example 3 described hereinafter.

[0051] In the example illustrated in FIG. 1, the process comprises four successive steps 10, 12, 14 and 16 carried out on a lock of hair fibres by a device for shaping the head of hair. The device is configured to perform the various steps of the process successively on the hair fibres, by movement of said device along the lock of hair, in particular over a portion of the hair fibres inserted between two arms of said device, forming an iron.

[0052] Step 10 is a step of combing the hair, making it possible to separate the hair fibres, before applying a composition in step 12. The application of the composition 12 is preferentially carried out immediately after step 10. The hair fibres are then subjected to a steam treatment 14 which is carried out immediately after step 12. Finally, the hair fibres are subjected to a heat treatment 16 intended to smooth them. They are brought into contact with hot plates, in particular each arranged on one arm of the device, between which they are held tight.

[0053] The application of composition 12 can be carried out using an applying member placed on one of the arms and which holds the portion of hair fibres undergoing treatment tight against a counter-bearing surface of the other arm. As a variant, the application of composition 12 can be carried out using two tools, in particular an applying member and a member for distributing the composition on the hair fibres.

[0054] As a variant, the various steps above are carried out with at least two different devices. Steps 10 and 12 can be carried out with a same device, for example a comb or a hairbrush applying the composition, and steps 14 and 16 can be carried out by a same device, in particular a smoothing device, or by two distinct devices, in particular a device for applying steam and a device for smoothing the hair.

EXAMPLE 1

[0055] A first device suitable for the treatment according to the invention is used on locks of natural hair of Caucasian type, having type IV curliness.

[0056] These locks are combed by passing through a comb and then the haircare composition A, the formulation of which is given in Table 1, is applied to said locks, by pinching the locks between an applying member and a counter-bearing surface.

TABLE-US-00001 TABLE 1 Composition A. INCI Name % by weight AMODIMETHICONE (and) TRIDECETH-6 (and) 1.0 CETRIMONIUM CHLORIDE.sup.(1) PEG-40 HYDROGENATED CASTOR OIL 0.8 DIMETHICONE (and) LAURETH-23 (and) 5.0 LAURETH-4 .sup.(2) BEHENTRIMONIUM CHLORIDE 1.0 STEARYL ALCOHOL 1.5 Active agents 0.12 Fragrance 0.2 Preservative 0.9 Water qs 100 .sup.(1)XIAMETER MEM-8299 EMULSION sold by the company DOW CORNING .sup.(2) XIAMETER MEM-2664 EMULSION sold by the company DOW CORNING

[0057] The locks are then subjected to steam with a flow rate of approximately 3.5 g/min, then the locks are pinched between two plates of the device, heated to a temperature of 200? C.

[0058] In parallel, a second device is used on locks of hair of the same type as previously. This device makes it possible to carry out the same steps as previously, but the combing step is carried out after the application of the product.

[0059] For these two treatments, the time periods between the various steps are approximately the same and the locks of hair are from the same batch.

[0060] The combing force is measured using a tensile testing machine, in particular a Lloyd LS1? with a 50 N sensor, by measuring the mechanical strength of the device by passing over a lock of hair. The results are given in Table 2 and in FIG. 2:

TABLE-US-00002 TABLE 2 Combing force measured for the first and second devices, at equivalent amount of product applied COMBING FORCE/ APPLICATION (a.u.) Standard Condition Mean deviation Second device 3807.8 1126.9 First device 1356.1 413.6

[0061] It is noted, on the graph of FIG. 2, that when the combing step is upstream of the applying step (application with the first device), the force required by the user to move the device along the lock of hair for the same amount of composition applied is on average lower than when the combing step is carried out downstream of the applying step (application with the second device).

[0062] Carrying out the combing step before the applying step facilitates the movement of the device along the lock of hair while preserving good composition application.

EXAMPLE 2

[0063] A first device suitable for the treatment according to the invention is used on a lock of natural hair of Caucasian type, having type IV curliness.

[0064] The lock is combed by passing through a comb and then composition A is applied to the lock by pinching the latter between an applying member and a counter-bearing surface. The lock is then subjected to steam with a flow rate of approximately 3.5 g/min, and then it is pinched between two plates heated to a temperature of 200? C. The above treatment is carried out by passing the device along the lock of hair for a period of 15 s.

[0065] In parallel, a second device is used on a lock of hair of the same type as previously. This second device makes it possible to carry out the same steps as previously, but the combing step is carried out after the application of the composition. The treatment time is the same.

[0066] For these two devices, the time periods between the various steps are approximately identical.

[0067] Finally, a commercial smoothing device, in this case a Styler? ghd gold classic, is used on a lock of hair of the same type as previously. This smoothing device does not comprise any combing means and means for applying the composition. It is passed along the lock of hair 3 times, each pass lasting 8 s.

[0068] The locks of hair used for these various treatments are from the same batch.

[0069] FIG. 3 presents four locks of hair. The first lock 20 starting from the left is a lock of hair of the type previously described, which has undergone no treatment. The second lock of hair 22 is a lock of hair of the same type, which has been treated with the first device. The third lock of hair 24 is a lock of hair of the same type, which has been treated with the second device. Finally, the last lock of hair 26 is a lock of hair of the same type, which has been treated with the commercial device.

[0070] It is noted that, when the combing step is carried out upstream of the applying step, better smoothing is obtained. The hair fibres are straighter and as a result exhibit better alignment with one another. The hair fibres also occupy a smaller volume.

EXAMPLE 3

[0071] A first treatment according to the invention is carried out on a lock of natural hair of Caucasian type, having type IV curliness.

[0072] In a first applying step, a first device is used. The device makes it possible to comb the lock by passing through a comb, then to apply composition A to said lock by pinching between an applying member and a counter-bearing surface. The first device performs two passes lasting 15 s over the lock of hair.

[0073] In a second smoothing step, the lock of hair passes through a commercial smoothing device, in this case the Styler? ghd gold classic previously used. This smoothing device makes it possible to pinch the lock of hair between two plates heated to a temperature of 190? C. It is passed along the lock of hair twice, each pass lasting 15 s.

[0074] In parallel, a second treatment is carried out on a lock of hair of the same type as previously. The second treatment is identical to the first, except that the applying step is carried out with a second device. The latter makes it possible to carry out the same steps as previously, but the combing step is carried out after the application of the composition. The treatment time and the number of passes over the lock of hair are the same.

[0075] For the two treatments, the time periods between the various steps are approximately identical.

[0076] The combing force as a function of the amount of product applied is determined by measuring the resistance of each device to the passing over a lock of hair using a tensile testing machine, in particular a Lloyd LS1? with a 50 N sensor. The measurements are taken for each applying and smoothing step.

[0077] The measurements are taken on three different locks of hair of the abovementioned type.

[0078] The results are presented in FIG. 4.

[0079] It is noted, on the graph of FIG. 4, that when the combing step is upstream of the applying step (application with the first device), the forces required by the user to move the first device and the smoothing device during the first treatment along the lock of hair for the same amount of composition applied are on average lower than those required with the second device and the smoothing device during the second treatment.

[0080] Carrying out the combing step before the applying step facilitates the movement of the devices along the lock of hair while preserving good composition application.