Three-Piece Recyclable Cap for Flawless Cosmetic Finishes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing caps for cosmetic and medical containers are aesthetically flawed due to non-recyclable materials and high production costs, failing to meet quality, aesthetics, and environmental sustainability standards.
Innovation Solution
A three-piece, single-material cap made from polypropylene or polyethylene, featuring a base body, liner, and seal, designed to minimize thickness variations and mold-related flaws, using injection molding and adhesives/welding for seamless assembly, ensuring a flawless finish and recyclability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If premium materials (ABS, PET, PETG, SAN, PS) are used to achieve high aesthetic quality, then the cap appearance is flawless, but the material becomes expensive and difficult to recycle
Solution Approach 1:
The cap is divided into three separate components (base body, liner, and closure) that can be manufactured independently using recyclable materials, then assembled together. This segmentation allows each part to be optimized for both aesthetics and recyclability, resolving the contradiction between material quality and environmental sustainability.
Solution Approach 2:
The invention uses composite construction combining multiple recyclable materials (polypropylene, polyethylene, polyamide) in different components. This allows achieving the aesthetic quality previously only available from premium materials while maintaining recyclability, as each material can be selected for its specific properties and then recycled appropriately.
2Ease of manufacture
If a single-material construction is used to improve recyclability, then environmental sustainability increases, but achieving flawless aesthetic finish becomes more difficult due to mold-induced defects
Solution Approach 1:
By segmenting the cap into three parts manufactured separately and then assembled, the invention avoids the need for complex single-piece molding that causes defects. Each component can be molded with simpler, more reliable processes, reducing defects while maintaining the single-material recyclability benefit.
Solution Approach 2:
The liner acts as an intermediary component between the base body and closure, providing a smooth aesthetic surface that conceals any minor defects from the functional components. This intermediary element ensures flawless appearance while allowing the use of recyclable materials throughout.
3Manufacturing precision
If complex multi-material construction is used to achieve high aesthetic quality, then the cap appearance improves, but production costs increase and recyclability decreases
Solution Approach 1:
The invention uses homogeneous recyclable materials (polypropylene, polyethylene, polyamide) for all three components, creating visual consistency and aesthetic quality without the complexity of multi-material construction. This homogeneity simplifies both manufacturing and recycling while maintaining high aesthetic standards.
Solution Approach 2:
The cap is segmented into three components made from compatible recyclable materials, achieving the aesthetic quality of multi-material construction through careful selection and assembly of homogeneous materials. This segmentation reduces overall complexity while maintaining high visual standards.
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 cap achieves high aesthetic quality, reduced production costs, and environmental sustainability by using recyclable materials while maintaining functional integrity and eliminating mold-induced defects.
Implementation Method 1
The liner is adhesively bonded to the base body
Implementation Method 2
The liner is welded to the base body
Data Source
AI summary
A cap (1) comprising a base body (2, 2′) is endowed, on one of the internal sides thereof, with a thread (3), a seat (4) in which a seal (5) is housed at least partially, and a liner (6) fitted onto the base body (2) and torsionally fastened thereto, which completely conceals the base body (2) from lateral views and in at least one plan view.