Composite Powder Reduces Dusting via Hydrophobic Cellulose
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Solution Overview
Problem
Powdered materials, such as baby powder, tend to 'dust' when applied to the skin, leading to reduced precision and increased airborne particulates, making it difficult to accurately target the application site.
Innovation Solution
A combination particulate composition comprising a first powder component with starch or polysaccharides bearing hydroxyl moieties and a second powder component with linear hydrophobic cellulose particles, which reduces dusting and enhances application precision when applied to the skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If powdered materials are applied to the skin, then skin benefits such as reduced irritation are achieved, but airborne dusting increases and application precision decreases
Solution Approach 1:
The patent applies composite materials by combining starch particles with hydrophilic surface properties and cellulose particles with hydrophobic surface properties. This composite particulate material leverages the complementary characteristics of both materials: the hydrophilic starch provides skin benefits through moisture interaction, while the hydrophobic cellulose reduces airborne dusting by minimizing electrostatic attraction to skin and air currents, thereby resolving the contradiction between delivering skin benefits and reducing airborne dusting.
2Reliability
If powdered materials are applied to the skin, then skin benefits such as reduced irritation are achieved, but application accuracy and precision decrease
Solution Approach 1:
The composite particulate material combines starch and cellulose particles where the hydrophobic cellulose component reduces unwanted adhesion to surfaces and air, allowing the powder to be more easily brushed or blown away from non-target areas. This enables more precise application to target sites while maintaining the skin benefits provided by the starch component.
3Area of stationary object
If smaller particles are used in the powder composition, then surface area and skin coverage are improved, but dusting and airborne particulate release increase
Solution Approach 1:
The patent uses composite materials where hydrophobic cellulose particles are combined with starch particles. The hydrophobic cellulose reduces electrostatic attraction between small particles and skin surfaces or air currents, thereby reducing airborne dusting while allowing the use of smaller particles for improved skin coverage and surface area contact.
4Reliability
If more powder material is applied to ensure coverage, then skin benefits are enhanced, but airborne dusting and material loss increase
Solution Approach 1:
The composite particulate material combines starch and cellulose where the hydrophobic cellulose component reduces airborne dusting, thereby minimizing material loss to the air. This allows more powder to remain on the target skin surface, enhancing skin benefits while reducing overall material consumption and waste.
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 combination composition significantly reduces airborne dusting and improves the accuracy of powder application, ensuring a more controlled and localized delivery of the powder to the target site while maintaining skin benefits like reduced irritation.
Implementation Method 1
a second powder component including a plurality of particles including linear hydrophobic cellulose particles
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~4
AI summary
Combination powdered material, including a first powder composition and a second powder composition, the first powder composition including cellulose particulate material and the second powder composition including starch particles, alone or in combination with talc particles.