Pressed Makeup Powder Freeze-Drying Method
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pressed powders face challenges in achieving improved spreadability and uniform applicability while maintaining compression moldability, especially when containing high amounts of globular powders, due to the use of oil binders which can result in a heavy feel and reduced spreadability when applied over sticky cosmetic films.
Innovation Solution
A method involving freeze-drying to prepare pressed make-up powders with a high content of globular powders, eliminating the need for oil binders and incorporating a water-soluble binder, allowing for increased globular powder content up to 60 wt.% and maintaining shape and stability, thereby enhancing moldability and the feeling of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil binder is used to increase compression moldability and prevent cracking, then compression stability is improved, but the pressed powder gives a heavy feeling and degrades the feeling of use
Solution Approach 1:
The patent changes the physical and chemical parameters of the binder system by replacing oil-based binders with water-soluble polymers (carboxymethyl cellulose, hydroxyethyl cellulose, or carbomer at 0.1-5 wt%). This parameter change maintains compression stability while eliminating the heavy feeling, as the water-soluble nature of these polymers provides binding without the oily residue that degrades user experience.
Solution Approach 2:
The patent uses water-soluble polymers that can be easily applied and dissolved on the skin, providing a temporary binding effect during application that then dissipates, avoiding the persistent heavy feeling of oil binders. These polymers serve their binding purpose during compression and application, then become non-intrusive.
2Ease of operation
If globular powder content is increased to improve spreadability, then uniform applicability is improved, but compression moldability deteriorates due to pores between powder particles
Solution Approach 1:
The patent introduces water-soluble polymers as intermediary binding agents that fill the pores between globular powder particles. These polymers act as a mediating substance that allows high globular powder content (maintaining spreadability) while providing sufficient cohesive force for compression molding. The polymer network bridges the gaps between particles, enabling both high powder content and manufacturability.
Solution Approach 2:
The patent creates a composite material system combining globular powder particles with water-soluble polymer matrices. This composite structure allows the globular particles to maintain their spreadability benefits while the polymer matrix provides the binding strength needed for compression. The composite nature enables properties that neither component alone could achieve.
3Reliability
If oil binder is used to provide cohesive force between powder particles, then powder scattering is reduced, but the pressed powder gives a heavy feeling when applied
Solution Approach 1:
The patent uses water-soluble polymers that provide temporary cohesive force during application, then dissolve or dissipate on the skin, avoiding the persistent heavy feeling of oil binders. These polymers serve their binding purpose during compression and application, then become non-intrusive, providing scattering prevention without residual weight.
Solution Approach 2:
The patent replaces the mechanical/adhesive mechanism of oil-based binding with a water-soluble polymer system that provides cohesive force through hydrogen bonding and polymer chain entanglement. This substitution maintains the necessary binding strength to prevent powder scattering while eliminating the oily residue that causes heavy feeling, as water-soluble polymers interact differently with skin.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method produces pressed powders with improved compression moldability and a smooth, light feel upon application, preventing clumping and ensuring even coverage without the heavy, sticky sensation associated with oil binders, while maintaining the stability of active ingredients.
Implementation Method 1
A method involving freeze-drying to prepare pressed make-up powders with a high content of globular powders
Implementation Method 2
The paste of the above (1) and (2) was freeze-dried under the condition of -70°C in a chamber, and then freeze-dried for 12 hours under conditions of 0.004 mbar and -20 to 5°C to obtain a pact
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to a method for producing pressed make-up powder having enhanced moldability and improved ease of application. The method for producing pressed make-up powder according to the present invention allows pressed powder containing globular powder in large amounts to be produced without using an oil binder, and allows damage to the active ingredients which are unstable in the external environment to be prevented. The pressed powder produced according to the present invention contains air in the inner gaps generated during the production process and a large amount of globular powder to thus prevent clumping, provide even coverage, and manifest in a smooth and light application.