Preparation method for powder product, powder product, and powder commodity

A preparation method for a powder product, comprising the following steps:

• mixing 30% to 50% by mass of an oil-phase component and 50% to 70% by mass of a water-phase component to form a powder mixture liquid, wherein based on a total weight of the powder mixture liquid, the oil-phase component comprises 28.85% to 48.8% of a filler, 0.1% to 1% of an emollient, and 0.05% to 0.2% of an antioxidant, and the water-phase component comprises 53.7% to 68.9% of a solvent, 0.5% to 3% of a moisturizer, 0.5% to 2% of an emulsifier, 0.1% to 0.5% of a thickener, and 0.05% to 0.8% of a preservative;
• feeding the powder mixture liquid into a mold, and baking the powder mixture liquid at a temperature of 35° C. to 55° C. for 1 to 2 hours until its moisture content is ≤20%, to obtain a powder base product;
• cooling the powder base product to a predetermined temperature to obtain a solidified powder base product, wherein the predetermined temperature is lower than a consolute temperature of the powder base product;
• and
• freezing the solidified powder base product in a freeze dryer at a temperature of −40° C. to −50° C. for 0.5 to 2 hours;
• and sublimation drying in the freeze dryer under negative pressure conditions by heating the solidified powder base product to a temperature of −3° C. to 3° C., wherein the heating comprises a plurality of first heating stages and a plurality of first heat preservation stages, the first heating stages and the first heat preservation stages are alternately carried out;
• a heating rate in the first heating stages is 0.5 to 1° C./min for 10 to 20 minutes, and a first heat preservation time is 1.5 to 2 hours;
• desorption drying the solidified powder base product at a temperature of 20° C. to 60° C. to obtain the powder product with a water content of 2% to 5%, wherein the desorption drying comprises a plurality of second heating stages and a plurality of second heat preservation stages, the second heating stages and the second heat preservation stages are alternately carried out;
• a heating rate in the second heating stages is 0.5 to 1° C./min for 10 to 20 minutes, and a second heat preservation time is 1.5 to 2 hours.