Production method for personal care product

Patent metadata

Field	Value
Publication number	US-12564998-B2
Application number	US-202418657817-A
Country	US
Kind code	B2
Filing date	May 8, 2024
Priority date	Dec 27, 2021
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A production method for a personal care product applicable to a human body can include a forming step in which a nozzle is moved relative to an object while a composition having fluidity is supplied from the nozzle to the object to form a deposit derived from the composition on the object. A nozzle with a nozzle diameter of 0.01 mm or more and 2 mm or less may be used as the nozzle. In the forming step, the composition can be supplied such that a ratio of a distance between a tip of the nozzle and the object to the nozzle diameter (distance/nozzle diameter) is set to 0.35 or more and less than 3.

First claim

The invention claimed is:

1 . A method for producing a personal care product applicable to a human body, the method comprising:
forming a deposit derived from a composition having fluidity on an object, said forming including moving a nozzle relative to the object while the composition is supplied from the nozzle to the object wherein the nozzle has a nozzle diameter of 0.01 mm or more and 2 mm or less, in said forming, the composition is supplied such that a ratio of a distance between a tip of the nozzle and the object to the nozzle diameter is set to 0.35 or more and less than 3, the composition is linearly continuously supplied from the nozzle toward the object, in said forming, the composition is supplied such that a ratio of relative moving speed of the nozzle relative to the object in a plane direction to a supply speed of the composition from the nozzle is set to 0.1 or more and 2 or less, and a viscosity of the composition at a temperature at which the composition is supplied from the nozzle is 0.1 Pa·s or more and 1 000 Pa·s or less.

2 . The method for producing a personal care product according to claim 1 , wherein the viscosity of the composition at the temperature at which the composition is supplied from the nozzle is 1 Pa·s or more and 200 Pa·s or less.

3 . The method for producing a personal care product according to claim 1 , wherein the composition contains a volatile solvent, and the method further comprises, after said forming, drying the composition.

4 . The method for producing a personal care product according to claim 1 , wherein the composition is a melt obtained by heat melting.

5 . The method for producing a personal care product according to claim 1 , wherein for said forming, the ratio of the distance between the tip of the nozzle and the object to the nozzle diameter is 0.55 or more and 2 or less.

6 . The method for producing a personal care product according to claim 1 , wherein for said forming, the distance between the tip of the nozzle and the object is 0.15 mm or more and 0.70 mm or less.

7 . The method for producing a personal care product according to claim 1 , wherein a thickness of the deposit is 0.05 mm or more and 1 mm or less.

8 . The method for producing a personal care product according to claim 1 , wherein the nozzle diameter is 0.2 mm or more and 0.6 mm or less.

9 . The method for producing a personal care product according to claim 1 , wherein the personal care product is a cosmetic product, a soap, an aroma candle, or a bathing agent, and/or the object is a paper, a film, a nonwoven fabric, a metal, a resin, or the personal care product.

10 . The method for producing a personal care product according to claim 1 , wherein said forming includes forming one or more deposits other than the deposit on the object.

11 . The method for producing a personal care product according to claim 1 , wherein the temperature of the composition supplied from the nozzle is 30° C. or less.

12 . The method for producing a personal care product according to claim 1 , wherein the composition is a mixture comprising liquid and powder, and an average particle size of the powder is 1 μm or more.

13 . The method for producing a personal care product according to claim 1 , wherein the composition is a mixture comprising liquid and powder, and a content of the powder in a solid content of the deposit derived from the composition is 70 mass % or more and 99 mass % or less.

14 . The method for producing a personal care product according to claim 1 , wherein said forming step is performed such that a ratio of a relative moving speed of the nozzle relative to the object in a plane direction to the supply speed of the composition from the nozzle is 1.5 or less.

15 . The method for producing a personal care product according to claim 1 , wherein a supply amount of the composition from the nozzle is 0.05 mm 3 /s or more and 150 mm 3 /s or less.

16 . The method for producing a personal care product according to claim 1 , wherein a first deposit is formed by performing said forming step such that a deposition region, in which the deposit is present on the object, and a non-deposition region, in which no deposit is present on the object, are formed when the object is viewed in a plan view and, then
a second deposit is formed in the non-deposition region by performing said forming again, in which a composition thereof is the same as or different from the composition supplied in forming the first deposit.

17 . The method for producing a personal care product according to claim 16 , wherein the non-deposition region is formed so as to be surrounded by the deposition region when the object is viewed in the plan view.

18 . The method for producing a personal care product according to claim 16 , wherein the second deposit is formed in an entire region of the non-deposition region.

19 . The method for producing a personal care product according to claim 16 , wherein a third deposit is formed over the first deposit and the second deposit, in which a composition thereof is the same as or different from the composition supplied in forming the first deposit or the composition supplied in forming the second deposit, thus making a three-dimensional shaped body.

20 . The method for producing a personal care product according to claim 19 , wherein the second deposit is transparent and the first deposit is colored.

Assignees

• Kao Corp

Inventors

• Hirano Takahiro
• Natsui Shohei
• Nakanishi Yuuya

Classifications

• B29K2995/0097

  Thickness · CPC title

• B29K2995/0026

  Transparent · CPC title

• B29K2995/002

  Coloured · CPC title

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · CPC title

• B29C64/209

  Heads; Nozzles · CPC title