Elastomeric Fitment Sealing Rib for Flexible Pouch Alignment
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Solution Overview
Problem
Conventional heat sealing processes for flexible pour pouches are inefficient due to the need for precise alignment, leading to seal failures, increased production costs, and significant loss of packaging and contents, with failure rates ranging from 3% to 40%.
Innovation Solution
A fitment with a base and sealing ribs made from an ethylene/α-olefin multi-block copolymer, which improves the seal's robustness and flexibility, accommodating variations in film structure and thickness, and reduces seal failure rates by deforming during the heat sealing process and recoiling to ensure a strong, precise seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional heat sealing processes are used with rigid fitment bases, then seal alignment precision is required, but seal failure rate increases and production efficiency decreases
Solution Approach 1:
The fitment base material is changed from rigid plastic to elastomeric material, fundamentally altering the mechanical properties. This parameter change allows the base to deform elastically during sealing to accommodate misalignment, then recover to maintain seal integrity, thereby reducing seal failure rates while maintaining manufacturing precision requirements
Solution Approach 2:
The fitment base is constructed as a composite structure combining rigid support elements with elastomeric sealing surfaces. This composite design provides both the structural integrity needed for positioning and the flexibility needed to accommodate alignment variations during the sealing process, resolving the contradiction between precision requirements and failure rates
2Manufacturing precision
If precise alignment between fitment base and film orientation is required, then seal quality improves, but production time increases and productivity decreases
Solution Approach 1:
The elastomeric material of the fitment base acts as a cushioning element that anticipates and absorbs alignment variations before the sealing process occurs. This beforehand cushioning allows the sealing process to proceed without requiring extreme precision, thereby maintaining seal quality while enabling faster production speeds
Solution Approach 2:
The fitment base transitions from a static rigid structure to a dynamic elastomeric structure that can adapt its shape during the sealing process. This dynamic behavior allows the base to automatically compensate for alignment variations in real-time, eliminating the need for slow, precision-aligned sealing operations and thereby increasing productivity
3Reliability
If quality control measures are implemented to reduce seal failures, then seal reliability improves, but production costs increase
Solution Approach 1:
The elastomeric fitment base is designed to self-correct alignment issues through its inherent elastic properties, eliminating the need for external quality control interventions. The material automatically adjusts to accommodate variations in film thickness and alignment, providing self-service reliability improvement without adding production costs
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 use of ethylene/α-olefin multi-block copolymer in the fitment's sealing ribs enhances the seal's integrity, reducing leakage and production costs by allowing for more forgiving alignment during heat sealing and maintaining film integrity, thereby lowering seal failure rates and ensuring the contents' safety.
Implementation Method 1
reduces seal failure rates by deforming during the heat sealing process and recoiling to ensure a strong, precise seal
Implementation Method 2
The base is sealed to the first multilayer film and the second multilayer film
Data Source
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AI summary
The present disclosure provides a fitment. In an embodiment, a fitment is provided and includes a top portion, a base, and a channel extending through the top portion and the base for passage of a flowable material. The base includes a pair of opposing sidewalls. The sidewalls extend around the channel. The sidewalls are joined together at opposing ends. The fitment further includes at least one sealing rib extending along the sidewalls. The sealing rib includes an ethylene/α-olefin multi-block copolymer.