Foamed Plastic Cosmetic Applicator with Rigid Core
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Solution Overview
Problem
Existing cosmetic product application devices often compromise between user comfort and precision in application, and the production methods are complex and require multiple steps, lacking an efficient method to achieve both comfort and aesthetic results.
Innovation Solution
A cosmetic product application device featuring a foamed plastic applicator element connected to a holding member via a stem, where the applicator element is partially or fully made of thermoplastic elastomers like Versaflex™, with a rigid head and application part fixed through interlocking shapes and adhesion, and produced using an injection molding method that involves injecting liquid plastic and gas into a mold to create a foamed plastic structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the applicator element is made of soft material for user comfort, then usage comfort is improved, but mechanical resistance and precision in application deteriorate
Solution Approach 1:
The applicator element is constructed as a composite structure with an inner core made of rigid material (acrylic, polystyrene, or polyethylene) providing mechanical strength and precision, surrounded by an outer layer of soft foamed thermoplastic elastomer providing user comfort. This composite construction allows both hard and soft materials to work together to satisfy opposing requirements.
Solution Approach 2:
Different parts of the applicator element have different material properties: the inner core provides rigidity where structural integrity is needed, while the outer foamed layer provides softness where skin contact occurs. This local differentiation of material qualities allows the single component to simultaneously satisfy both comfort and precision requirements.
2Manufacturing precision
If the applicator element is made of hard material for precision in application, then precision is improved, but usage comfort deteriorates
Solution Approach 1:
The applicator element combines rigid inner core material for precision with soft outer foamed material for comfort, allowing both precision and comfort to coexist in a single component.
Solution Approach 2:
The rigid material is localized to the inner core where precision is required, while the soft material is applied to the outer surface where comfort is required, creating local quality differentiation.
3Ease of manufacture
If traditional production methods are used for the applicator element, then manufacturing capability is maintained, but the number of production steps and complexity increase
Solution Approach 1:
The invention merges the inner core and outer foamed layer into a single integrated component made by co-injection molding. This combining of multiple parts into one manufacturing process reduces assembly steps and production complexity while maintaining manufacturing capability.
Solution Approach 2:
The co-injection molding process creates a composite structure in a single manufacturing step, eliminating the need for separate production and assembly of the inner core and outer layer.
4Ease of manufacture
If traditional production methods are used for the applicator element, then manufacturing capability is maintained, but aesthetic results deteriorate
Solution Approach 1:
By combining the molding of the inner core and outer layer into a single co-injection process, the invention achieves better surface finish and aesthetic appearance without compromising manufacturing capability.
Solution Approach 2:
The outer foamed layer is specifically designed to provide aesthetic quality on the surface while the inner core provides structural integrity, with each layer optimized for its specific function.
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 solution provides enhanced user comfort with precise application while minimizing production steps, achieving a high-quality aesthetic result and improved mechanical resistance through the use of foamed plastic materials and efficient manufacturing processes.
Implementation Method 1
injecting liquid plastic and gas into a mold in order to implement a foamed plastic
Implementation Method 2
the applicator element is at least partially in foamed plastic
Implementation Method 3
the applicator element is made in whole or in part of foamed plastic... the softer material part, which is intended to be in contact with the user's skin
Data Source
AI summary
A cosmetic product application device comprising a holding member and an applicator element secured to the holding member. The applicator element is at least partially foamed plastic. The application device may be part of a cosmetic product packaging and application assembly.