Metallized Barrier Films for Swelling-Resistant Hydrogen Peroxide Packaging
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Solution Overview
Problem
Existing packaging solutions for oxidizing agents used in oxidative hair colorants, such as hydrogen peroxide, face challenges with gas and water vapor permeability, leading to swelling and potential bursting, while also requiring mechanical strength and ease of access.
Innovation Solution
A multilayer film packaging system comprising polyethylene terephthalate, polyethylene, and metallized oriented polypropylene layers, with a barrier layer to control gas and water vapor permeability, ensuring mechanical stability and preventing swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If packaging is made from plastic or metal foils with bonding, then material consumption is reduced and cost is lowered, but gas permeability causes swelling and potential bursting
Solution Approach 1:
The packaging uses a multilayer film composite consisting of a plastic foil layer (first polymer layer) and a metallized layer (barrier layer with metal coating). This composite structure combines the flexibility and cost-effectiveness of plastic with the gas and water vapor barrier properties of metal, preventing swelling while maintaining low material consumption
Solution Approach 2:
The barrier layer is strategically positioned between the oxidizing agent composition and the external environment, providing localized protection against gas and water vapor permeability. The metallized layer specifically addresses the permeability issue in the regions where it is applied, creating a selective barrier property
2Reliability
If barrier layer with metal is added to reduce gas and water vapor permeability, then storage stability is improved, but device complexity increases
Solution Approach 1:
The packaging combines a plastic foil layer and a metallized layer in a multilayer film composite, where each layer contributes specific properties. The plastic layer provides flexibility and formability, while the metallized layer provides barrier properties, achieving storage stability without excessive complexity
Solution Approach 2:
The packaging uses thin film structures for both the plastic foil layer and the metallized layer, maintaining flexibility and ease of manufacturing while providing the necessary barrier properties. The thin film approach avoids the need for thick, rigid structures
3Strength
If developer bottle with thick walls is used to reduce diffusion, then mechanical strength is improved, but material consumption and cost increase
Solution Approach 1:
Instead of using a single thick plastic wall, the packaging uses a multilayer film composite where the metallized layer provides enhanced barrier and structural properties. This allows for thinner overall wall thickness while maintaining or improving mechanical strength and barrier performance
Solution Approach 2:
The metallized layer is applied selectively to provide localized reinforcement and barrier properties in critical areas, rather than requiring uniform thick walls throughout the entire packaging structure
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 packaging maintains storage stability and prevents swelling or bursting of oxidizing agent compositions, allowing safe and easy access to the contents.
Implementation Method 1
The barrier layer has a penetration barrier effect for gases and water vapor. The barrier layer comprises a metal.
Implementation Method 2
The package is made from a special multilayer film composite system, the wall of which comprises at least two polymeric layers and a barrier layer. The barrier layer has a penetration barrier effect for gases and water vapor.
Data Source
AI summary
The present invention relates to a cosmetic product for changing the natural color of keratin fibers, in particular human hair, comprising at least one packaging (VP) and a cosmetic composition (KM) found in said packaging (VP). The packaging is made of a multi-layered film (F) which contains at least two polymer layers (P1) and (P2) and at least one barrier layer (BS). The cosmetic composition comprises at least one oxidizing agent, at least one C8-C30 alcohol and at least one non-ionic surfactant. The use of the packaging (VP) in combination with the cosmetic composition (KM) surprisingly does not lead to a blowing of the packaging or an excessive loss of water from the agent (KM) during storage.