Production method of a powder cosmetic

摘要

A production method for making powder cosmetics having improved characteristics. The method includes mixing a powder component and an oil component as a binder using a mixing apparatus. The mixing apparatus is a facing rotor type mixing apparatus having a first rotor with a plurality of blades and a second rotor with a plurality of blades in a mixing chamber. The first rotor and the second rotor face each other and have rotating shafts on the same axis line. In the facing rotor type mixing apparatus, raw materials are fed into an introduction opening on a first rotor side. The raw materials are mixed by rotating the first rotor and the second rotor in the same or opposite directions to each other, and the mixed raw materials are discharged from a discharge opening on a second rotor side.

主权项

1. A production method of a powder cosmetic comprising:
mixing raw materials comprising 65 to 97 mass % of powder component and 3 to 35 mass % of an oil component as a binder with a mixing apparatus, wherein the mass % is based on the total amount of powder cosmetic,
wherein the mixing apparatus is a facing rotor type mixing apparatus having a first rotor with a plurality of blades and a second rotor with a plurality of blades in a mixing chamber, in which the first rotor and the second rotor face each other and have respective rotating shafts on same axis line in an approximately horizontal direction, andwherein mixing comprises feeding raw materials into an introduction opening on a side of the mixing chamber proximate to the first rotor and rotating the first rotor and the second rotor in the same or opposite directions to each other to obtain a mixture in which the surface of the powder component is uniformly coated with the oil component without the agglomeration of the powder component, and discharging the mix from a discharge opening on a side of the mixing chamber proximate to the second rotor.