Aromatic Polyester Ampoules Preventing Taste Impairment
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Solution Overview
Problem
The existing blow molding, filling, and closing (BFS) process for producing ampoules often results in organoleptic impairments, such as taste and odor changes, due to the use of plastic materials like polyolefins, which are not neutral with the contents, especially for sensitive products like water, and do not prevent substance permeation effectively.
Innovation Solution
The use of aromatic polyester polymers like polyethylene furanoate (PEF), polyethylene terephthalate (PET), and their copolymers, which are organoleptically neutral, minimize taste impairment and prevent substance transfer, even at high extrusion temperatures, and allow for the production of ampoules with reduced wall thickness and transparency for easy inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional plastic materials like polyolefins are used in BFS process, then the manufacturing process is simple and efficient, but organoleptic impairments occur due to substance permeation and plastic taste transfer to contents
Solution Approach 1:
The patent employs multi-layer composite structures combining different plastic materials with complementary properties. Specifically, it uses inner layers made from organoleptically neutral materials (polyester, polyamides, or fluoropolymers) to prevent substance permeation and taste transfer, while outer layers use conventional polyolefins to maintain manufacturing simplicity and provide mechanical strength. This composite approach resolves the contradiction by integrating materials with different functional properties into a single container structure.
Solution Approach 2:
The patent applies different material properties to different regions of the container wall. The inner layer in direct contact with contents is made from organoleptically neutral materials to prevent substance permeation, while the outer layer uses conventional materials optimized for mechanical properties and processing. This local differentiation of material quality allows the container to simultaneously achieve chemical inertness where needed and manufacturing efficiency elsewhere.
2Reliability
If multi-layered BFS ampoules are used to prevent substance permeation, then gas and vapor permeation are reduced, but organoleptic neutrality is not improved because BFS polyolefins still introduce questionable substances via gas phase
Solution Approach 1:
The patent creates an inert barrier environment by introducing inner layers made from organoleptically neutral materials (polyester, polyamides, or fluoropolymers) that prevent both substance permeation and gas-phase transfer of questionable substances from BFS polyolefins. These inner layers act as protective barriers that isolate the contents from harmful substances, maintaining organoleptic neutrality while preserving the benefits of multi-layered structure for permeation prevention.
Solution Approach 2:
The patent combines conventional BFS polyolefins with organoleptically neutral materials in a multi-layer composite structure. The outer layer provides mechanical strength and processability, while the inner layer ensures organoleptic neutrality by preventing both liquid-phase and gas-phase substance transfer. This composite material approach resolves the contradiction by integrating materials with different functional properties.
3Volume of stationary object
If the ratio of filling volume to internal plastic surface area is small (as in ampoules), then the container size is compact, but organoleptic impairments increase due to greater contact between contents and plastic material
Solution Approach 1:
The patent uses inner layers made from organoleptically neutral materials (polyester, polyamides, or fluoropolymers) that create a protective barrier between the contents and the outer conventional plastic material. This composite structure ensures that even with high surface-area-to-volume ratios in compact ampoules, the contents remain isolated from harmful substances, preventing taste and odor impairments while maintaining compact container dimensions.
Solution Approach 2:
The patent applies organoleptically neutral materials specifically to the inner surface layer in direct contact with contents, while the outer layer uses conventional materials. This local differentiation ensures that the critical interface between contents and plastic is chemically inert, regardless of the overall container size or surface-area-to-volume ratio.
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 significantly reduces organoleptic changes and maintains neutrality during storage, enabling the production of ampoules with improved mechanical properties and transparency, ensuring the contents remain unaffected by the plastic material, even after extended storage.
Implementation Method 1
a first plastic material, in particular an aromatic polyester polymer and/or a polyester copolymer and/or a blend of these polymers, is used as plastic material for the product to be manufactured; wherein at least partially a polyethylene furanoate (PEF) or a polyethylene terephthalate (PET), as well as their respective copolymers and/or blends, is used as the aromatic polyester polymer
Implementation Method 2
the extruded, still-hot polymer tube is cut by a hot knife immediately before filling
Implementation Method 3
shaping a container body by holding a tubular, coextruded blow-molded blank between lower split mold parts
Implementation Method 4
blow molding, filling and closing process for producing a filled and sealed and storable container product
Implementation Method 5
holding a tubular, coextruded blow-molded blank between lower split mold parts and forming a cavity in the blow-molded blank
Data Source
Figure 1~2
Figure 3a~3b
Figure 4~6
AI summary
Disclosed is a method of blow moulding, filling and closing for producing a filled, closed and storable container product, especially in the form of an ampoule product (10), which is made of a plastics material and has a single-layer container or ampoule wall and in use permits the release of the product content, especially for oral use, when at least one discharge opening (16) is opened, said method being characterized in that plastics materials suitable for the method are selected, which when they interact with the container content before and during use are neutral in taste and/or smell or are substantially neutral in taste and/or smell, and remain neutral even during prolonged storage.