Skin-covering sheet for impregnation with cosmetic preparation and face mask
View Patent ↗A skin-covering sheet for impregnation with a cosmetic preparation according to the present invention includes a non-woven fabric in which a splittable conjugate fiber containing at least two components as viewed in fiber cross-section, namely a polyethylene component and another polymer component, and a hydrophilic fiber are blended, and hydroentangled. The conjugate fiber is partially split and includes a polyethylene ultrafine fiber having a fineness of 0.6 dtex or less. A face mask according to the present invention includes the skin-covering sheet for impregnation with a cosmetic preparation impregnated with 500 to 2000 mass % of a liquid containing a cosmetic preparation. It is therefore possible to obtain a skin-covering sheet for impregnation with a cosmetic preparation and a face mask that have good impregnating ability of a cosmetic liquid into the sheet layer, cause very little irritation to the skin, and are soft in texture.
1. A sheet for a face mask impregnated with a cosmetic preparation, comprising a non-woven fabric, which is formed of a hydroentangled mass of a splittable conjugate fiber and a hydrophilic fiber that are blended uniformly,
wherein the splittable conjugate fiber comprises at least two components as viewed in fiber cross-section, which are a polyethylene component and a polymer component other than the polyethylene component,
the splittable conjugate fiber is included in an amount ranging from 50 to 70 mass %, and the hydrophilic fiber is included in an amount ranging from 30 to 50 mass %,
the conjugate fiber is partially split and includes a polyethylene ultrafine fiber having a fineness of 0.6 dtex or less,
the polyethylene ultrafine fiber having a fineness of 0.6 dtex or less is included in an amount ranging from 10 to 40 mass % relative to a total amount of the conjugate fiber and a fiber obtained by splitting the conjugate fiber as 100 mass %,
the hydrophilic fiber is a cellulose fiber having a fineness of 0.5 to 2 dtex, and the fineness ratio of the hydrophilic fiber relative to the polyethylene ultrafine fiber (hydrophilic fiber/polyethylene ultrafine fiber) is 2.5 to 8,
a non-woven component layer of the sheet consists essentially of the non-woven fabric, which has a monolayer structure, and
the non-woven fabric has a smallest detected pore diameter of 15 μm or more, when measured in accordance with ASTM F 316 (bubble point method).
2. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the polyethylene ultrafine fiber has a fineness of 0.5 dtex or less.
3. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the polyethylene ultrafine fiber includes a conjugate fiber in which the polyethylene component and one or more other fiber components are attached.
4. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the other component is polyester.
5. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the non-woven fabric has a mean flow pore diameter ranging from 30 to 60 μm, when measured in accordance with the ASTM F 316 (bubble point method).
6. A face mask comprising the sheet for a face mask impregnated with a cosmetic preparation according to claim 1 , that is impregnated with 500 to 2000 mass % of a liquid containing a cosmetic preparation.
7. The sheet for a mask impregnated with a cosmetic preparation according to claim 4 ,
wherein the polyester contains titanium oxide or zinc oxide, or the polyester is polytrimethylene terephthalate.
8. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the non-woven fabric has a stress of 2 to 20 N/5 cm in a length direction of the sheet at 10% elongation in a dry state and a stress of 0.1 to 1 N/5 cm in a width direction thereof at 10% elongation in a dry state, and a stress of 1 to 15 N/5 cm in the length direction of the sheet at 10% elongation in a wet state and a stress of 0.08 to 0.9 N/5 cm in the width direction thereof at 10% elongation in a wet state.
9. The sheet for a face mask impregnated with a cosmetic preparation according to claim 1 ,
wherein the non-woven fabric has the smallest detected pore diameter in a range of 15-35 μm when measured in accordance with ASTM F 316 (bubble point method).