Dual-ovenable Polyamide Film Package with Modified Seal Layer
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Solution Overview
Problem
Packaging materials that are ovenable for both microwave and conventional ovens face challenges in maintaining dimensional stability and preventing leaks under handling forces before moisture equilibration, especially when exposed to elevated temperatures.
Innovation Solution
A dual-ovenable package design featuring a heat seal between two films, where the first film comprises at least 70% polyamides and a modified interior layer with ethylene/alkyl (meth)acrylate copolymers or ionomers, and the second film consists predominantly of polyamides, ensuring structural integrity and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If packaging materials are designed to be ovenable for both microwave and conventional ovens, then versatility and ease of operation are improved, but dimensional stability and leak prevention under handling forces before moisture equilibration deteriorate
Solution Approach 1:
The packaging structure is pre-designed with a multi-layer construction featuring a moisture-permeable outer layer and a moisture-impermeable inner layer. This preliminary structural arrangement ensures that when handling forces are applied before the polyamide equilibrates with ambient moisture, the package maintains its seal integrity and prevents leaks, while still achieving dual-ovenable capability.
Solution Approach 2:
The package utilizes a composite structure combining polyamide material with modified interior layers. This composite material design provides both the heat resistance required for conventional oven use and the moisture management properties needed for microwave use, while maintaining dimensional stability under handling forces before moisture equilibration.
2Temperature
If packaging is designed to withstand elevated conventional oven temperatures for extended periods, then temperature resistance is improved, but structural integrity under handling forces before moisture equilibration deteriorates
Solution Approach 1:
The packaging employs local quality differentiation through its multi-layer construction, where the outer layer is designed with specific moisture-permeable properties and the inner layer provides moisture-impermeable protection. This localized functional differentiation allows the package to withstand elevated conventional oven temperatures while maintaining structural integrity under handling forces before moisture equilibration occurs.
Solution Approach 2:
The structural design is established in advance to accommodate both high-temperature exposure and handling forces. The package is pre-configured with reinforced sealing mechanisms and a multi-layer structure that maintains dimensional stability during distribution and loading, before the polyamide material equilibrates with ambient moisture.
3Stability of the object's composition
If packaging allows polyamide to equilibrate with ambient moisture before handling, then dimensional stability is improved, but distribution and loading time increases
Solution Approach 1:
The packaging structure is pre-designed with inherent moisture management capabilities through its multi-layer construction. This preliminary action eliminates the need to wait for moisture equilibration before handling, as the structure maintains dimensional stability and seal integrity from the moment of package creation through distribution and loading operations.
Solution Approach 2:
The package structure performs self-service by automatically managing moisture equilibration through its multi-layer design. The moisture-permeable outer layer and moisture-impermeable inner layer work together to control moisture transfer, allowing the package to maintain stability during handling without requiring external intervention or waiting periods.
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 package maintains performance attributes and prevents leaks under handling and elevated oven temperatures, providing a stable and reliable packaging solution for food products.
Implementation Method 1
A package comprises a heat seal between a first film and a second film
Data Source
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AI summary
A package comprises a heat seal between a first film and a second film. The first film comprises at least 70% of one or more polyamides. The first film also comprises at least one modified layer comprising (1) at least 70% of one or more polyamides and (2) one or more modifiers selected from ethylene/alkyl (meth)acrylate copolymers, ethylene/(meth)acrylic acid copolymers, and ionomers. The second film comprises at least 70%) of one or more polyamides. The package is useful under ovenable conditions.