Container Lid Film with Peelable Interface for Volatile Substance Evaporation
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Solution Overview
Problem
Existing containers for volatile substances face challenges in balancing the need to prevent spillage and direct contact while allowing maximal evaporation of the substances, as the barrier part of the lid film reduces the evaporation rate when partially removed.
Innovation Solution
A container with a lid film comprising a coextruded multi-layer structure, including a barrier layer and a permeable layer, where the permeable layer is bonded to the container and features a peelable interface, allowing for easy separation and maintaining high evaporation rates by using polymer blends like mVLDLLDPE, LDPE, and LLDPE, ensuring at least 30% of the maximal evaporation rate is achieved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a barrier layer is used to prevent spillage and direct contact, then safety is improved, but the evaporation rate of volatile substances is reduced
Solution Approach 1:
The lid film is divided into two distinct functional layers: an outer multi-layer film with barrier properties for safety, and an inner multi-layer film with permeable properties for evaporation. This segmentation allows each layer to independently perform its specific function without compromising the other.
Solution Approach 2:
Different regions of the lid film structure are assigned different properties: the outer layer provides impermeable barrier protection, while the inner layer provides permeable evaporation capability. This local differentiation of material properties resolves the contradiction between safety and evaporation rate.
2Productivity
If the lid film is removed completely to maximize evaporation, then consumer perception is improved, but spillage and direct contact risks increase
Solution Approach 1:
The lid film structure separates the barrier function (outer layer) from the permeable function (inner layer), allowing the permeable inner layer to remain after activation while the outer barrier layer can be removed. This ensures maximum evaporation through the inner layer without the spillage risks associated with complete removal.
Solution Approach 2:
Instead of removing the entire lid film to achieve evaporation (which creates safety risks), the invention inverts the approach by keeping a permeable inner layer that provides both evaporation and safety. The barrier function is inverted from being the primary removable element to being a protective outer layer.
3Productivity
If a permeable lid film is used to allow evaporation, then consumer perception is improved, but protection from direct contact is reduced
Solution Approach 1:
The lid film is segmented into an outer barrier layer for protection and an inner permeable layer for evaporation. This segmentation allows the system to simultaneously provide both protection and evaporation functionality without compromise.
Solution Approach 2:
The lid film employs a composite structure with multiple material layers: the outer multi-layer film provides barrier properties, while the inner multi-layer film provides permeable properties. This composite material approach enables the system to exhibit both protective and evaporative characteristics.
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 effectively prevents spillage and direct contact while maximizing the evaporation rate of volatile substances, with evaporation rates of at least 40% to 70% of the maximal rate, ensuring consumer perception is not limited by the barrier layer when activated.
Implementation Method 1
a peelable interface which is interposed between the release layer and a layer that is permeable to the volatile substances
Implementation Method 2
The permeable layer is sealed on one side to the container and provides an evaporation rate of the volatile substances of at least 30% of a maximal evaporation rate
Implementation Method 3
a coextruded inner multi-layer film with at least one layer that is permeable to the volatile substances
Data Source
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AI summary
The invention relates to a container for emanating volatile substances, The container comprises a container body which has at least one opening and is closed by a lid film. The lid film comprises an outer multi-layer film having at least one barrier layer impermeable to the volatile substances, a coextruded inner multi-layer film having at least one layer permeable to the volatile substances. The coextruded inner multi-layer film is bonded on one side to the outer multi-layer film and on another side to the container. The coextruded inner multi-layer film consists of at least a polyethylene layer, a release layer comprising a polymer selected from the group consisting of EVOH and PETg, a peelable interface interposed between the release layer and a layer permeable to the volatile substances, whereby said permeable layer comprises a polymer selected from the group consisting of mVLDLLDPE, ethylene vinyl acetate copolymer, and ethylene n-butyl acrylate copolymer.