Induction Heat-Seal Liner with Aroma-Permeable Opening
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Solution Overview
Problem
Existing container seals do not allow adequate scent permeation, leading to products being sold without seals, which increases the risk of spillage, contamination, and reduced shelf life.
Innovation Solution
A method of forming induction heat-seal liners that allow aroma detection and visual inspection while maintaining barrier properties, using a multi-layer structure with a central opening in the metal-foil layer for induction heating and visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hermetic seal is used to prevent leakage and preserve product, then the barrier properties and shelf life are improved, but the scent permeation is blocked and consumers cannot smell the product
Solution Approach 1:
The seal is divided into multiple layers with different functions: an outer layer with aroma-permeable properties and an inner layer providing hermetic barrier. This segmentation allows the seal to simultaneously provide scent permeation and leakage prevention by distributing these conflicting functions across different layers.
Solution Approach 2:
Different regions of the seal have different properties: the outer surface is designed to be aroma-permeable to allow consumers to smell the product, while the inner surface maintains hermetic barrier properties to prevent leakage. This local differentiation of properties resolves the contradiction between scent permeation and barrier protection.
2Ease of operation
If no seal is used to allow scent permeation, then consumers can smell the product, but the risk of spillage and contamination increases
Solution Approach 1:
The seal structure separates the aroma-permeable outer layer from the hermetic inner barrier layer, enabling consumers to smell the product through the outer layer while the inner layer prevents spillage and contamination during transportation and handling.
Solution Approach 2:
The multi-layer seal acts as an intermediary structure between the product and the external environment, allowing controlled aroma permeation to consumers while maintaining protection against harmful factors like spillage and contamination through the hermetic inner layer.
3Ease of operation
If consumers sample the product by removing the cap and touching the substance, then they can experience the product, but contamination and germs are spread
Solution Approach 1:
The seal provides a controlled sampling mechanism where consumers can smell the product aroma through the permeable outer layer without physical contact, separating the sensory experience from direct product contact and thus preventing contamination and germ spread.
4Ease of operation
If a seal with a central opening is used to allow aroma detection, then consumers can smell and see the product, but the structural integrity and heat-seal bonding may be compromised
Solution Approach 1:
The seal is segmented into multiple layers where the central opening is configured in the outer aroma-permeable layer, while the inner hermetic layer maintains continuous structure for strong heat-seal bonding. This layering allows aroma and visual detection without compromising structural integrity.
Solution Approach 2:
The seal uses composite multi-layer construction combining materials with different properties: the outer layer allows aroma permeation and visual detection with central opening, while the inner layer provides hermetic barrier and structural strength for heat-seal bonding, achieving both detection capability and bonding strength.
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 induction heat-seal liners enable consumers to detect the aroma and visually inspect the product without removing the seal, while preventing leakage and contamination, thus enhancing product presentation and shelf life.
Implementation Method 1
The induction heating system forms an induction heat-seal liner (10) by heating a heat-seal bonding material (330) with an induction heating system
Implementation Method 2
heating of the continuous portion (44) to heat-seal bond the bottom layer (30) to the container rim (82)
Data Source
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AI summary
Induction heat-seal liner that allows a visual inspection of the product in the container to be made through the seal, and/or an aroma from the product to be detected through the seal, while the seal remains secured to the container to protect against leakage or contamination. In one embodiment, the liner has an intermediate metal-foil layer having a central opening, and a central liner portion, aligned in a thickness direction with a central opening of a metal-foil layer, comprises one or more materials or spaces that provide visibility into and/or aroma penetration from the open mouth of the container. In another embodiment, a dual heat-seal liner having a dispensing aperture is provided that heat seal bonds to both the cap and container to form a non-removable closure assembly that protects the metal-foil layer from degradation by the product being dispensed.