Cosmetic Product Applicator
Abstract
The cosmetic product applicator has an arithmetic mean height S a of a surface of the applicator in at least one portion A of the applicator that is strictly greater than 10.0 μm, this height being calculated in accordance with the following formula: S a = 1 A ∫ ∫ A z ( x , y ) dxdy , in which: A is the portion of the applicator in question, and x, y and z represent the coordinates of the surface of the applicator in an orthogonal system of Cartesian coordinates, with z corresponding to a measurement axis of the height.
Claims
exact text as granted — not AI-modified1 . A cosmetic product applicator comprising an arithmetic mean height S a of a surface of the cosmetic product applicator in at least one portion A of the cosmetic product applicator is strictly greater than 10.0 μm, this arithmetic mean height being calculated in accordance with the following formula:
S
a
=
1
A
∫
∫
A
z
(
x
,
y
)
dxdy
in which:
A is the portion of the applicator in question, and
x, y and z represent the coordinates of the surface of the applicator in an orthogonal system of Cartesian coordinates, with z corresponding to a measurement axis of the arithmetic mean height.
2 . The applicator according to claim 1 , wherein the arithmetic mean height S a of the surface of the applicator in the portion A is greater than 15.0 μm.
3 . The applicator according to claim 1 , wherein a maximum pit height S v of the surface of the applicator in the portion A is less than 200 μm.
4 . The applicator according to claim 1 , wherein a developed interfacial area ratio S dr of the surface of the applicator in the portion A of the applicator calculated according to the formula:
S
dr
=
1
A
[
∫
∫
A
(
[
1
+
(
∂
z
(
x
,
y
)
∂
x
)
2
+
(
∂
z
(
x
,
y
)
∂
y
)
2
]
-
1
)
dxdy
]
is greater than 70%.
5 . The applicator according to claim 1 , wherein the applicator is a cosmetic product applicator for the eyelashes, eyebrows, lips or skin.
6 . The applicator according to claim 1 , wherein the applicator comprises a body and protuberances, the portion A comprising one or more protuberances or parts of protuberances.
7 . The applicator according to claim 1 , wherein the applicator is manufactured by additive synthesis, preferably by powder bed fusion.
8 . The cosmetic article comprising an applicator according to claim 1 .
9 . A method of manufacturing a cosmetic product applicator by powder bed fusion, implemented so as to obtain an applicator whose arithmetic mean height S a of a surface of the applicator in at least one portion A of the applicator is greater than 10.0 μm, this arithmetic mean height being calculated in accordance with the following formula:
S
a
=
1
A
∫
∫
A
z
(
x
,
y
)
dxdy
in which:
A is the portion of the applicator in question, and
x, y and z represent the coordinates of the surface of the applicator in an orthogonal system of Cartesian coordinates, with z corresponding to a measurement axis of the arithmetic mean height.
10 . The method according to claim 1 , comprising at least a step of selecting powder grains which have a largest dimension of less than 80.0 μm.
11 . The method according to claim 10 , wherein the powder grains are selected by sieving.
12 . The method according to claim 9 , comprising at least a sandblasting step.
13 . The method according to claim 12 , wherein the sandblasting is carried out in an automatic drum sandblasting booth.
14 . The method according to claim 13 , wherein abrasive media including grains having a largest dimension between 4.0 and 140.0 μm are used.
15 . The method according to claim 14 , wherein the abrasive media used are selected from the group consisting of:
microbeads; sodium bicarbonate; and compressed fruit stones.
16 . The method according to claim 9 , comprising a step of cleaning by ultrasound.
17 . The method according to claim 16 , wherein the frequency of the ultrasound used is between 25 kHz and 45 kHz.
18 . The method according to claim 9 , wherein the powder in the powder bed fusion step is selected from the thermoplastic polymers of the family of aliphatic polyamides.
19 . The applicator according to claim 2 , wherein the arithmetic mean height S a of the surface of the applicator in the portion A is between 15.0 and 30.0 μm.
20 . The applicator according to claim 3 , wherein a maximum pit height S v of the surface of the applicator in the portion A is between 80 and 150 μm.
21 . The applicator according to claim 4 wherein the developed interfacial area ratio S dr of the surface of the applicator in the portion A of the applicator is greater than 100%Join the waitlist — get patent alerts
Track US2020281345A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.