Double-Layer PET Dispensing Container with Air Intake
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Solution Overview
Problem
Conventional dispensing containers are difficult to reuse, fail to clearly show the color of contents, and are inferior in retaining aroma.
Innovation Solution
A dispensing container with a double-layered structure made of polyethylene terephthalate resin, featuring a flexible inner container that deflates as content decreases, and an outer container with an intake hole for external air, enhancing aesthetics and aroma retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional dispensing containers are made of PP (polypropylene), then they are easy to manufacture, but they are difficult to reuse (recycle) and fail to clearly show colors of contents
Solution Approach 1:
The patent changes the material parameter from polypropylene to polyethylene terephthalate resin, which fundamentally alters the recyclability and optical properties of the container while maintaining manufacturability through established PET molding processes
Solution Approach 2:
The patent employs a double-layered composite structure with an inner container and an outer container, both made of PET resin, creating a composite system that combines the benefits of recyclability, aroma retention, and color visualization capabilities
2Ease of manufacture
If conventional dispensing containers are made of PP (polypropylene), then they are easy to manufacture, but they are inferior in performance for retaining aroma of the contents
Solution Approach 1:
The patent changes the material composition from polypropylene to polyethylene terephthalate resin, which has superior aroma retention properties due to its molecular structure and lower permeability to aromatic compounds
Solution Approach 2:
The double-layered PET container structure creates a more effective barrier against aroma loss compared to single-layer PP containers, with the composite structure providing enhanced protection while maintaining ease of manufacture
3Ease of manufacture
If conventional dispensing containers are made of PP (polypropylene), then they are easy to manufacture, but they fail to clearly show colors of contents
Solution Approach 1:
The patent changes the optical parameter of the container material from opaque or translucent polypropylene to clear polyethylene terephthalate resin, enabling direct visualization of content colors while maintaining ease of manufacture through standard PET processing
Data Source
AI summary
To provide a container including an inner container that is deformed as content decreases, the container being a dispensing container reusable and excellent in an aroma retaining property. To implement such container, a dispensing container (10) includes a container body (13) including a flexible inner container configured to be filled with content and to deflate as the content decreases, and an outer container encompassing the inner container and having an intake hole through which external air is taken into a space between the inner container and the outer container, a discharge cap (15) including a top surface part having a discharge port through which the content is discharged, the discharge cap (15) being mounted on a mouth portion (13a) of the container body (13), and an external air introduction hole that provides communication between the outside and the intake hole. The inner container and the outer container are made of a polyethylene terephthalate resin.