Flexible Package Fill Slit and Patch Seal Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flexible packaging with side gussets faces challenges in achieving an airtight seal due to thickness variations and multiple film layers, making it difficult to fill and seal, especially for customers without specialized equipment, and often requires wider sealing surfaces that many machines cannot accommodate.
Innovation Solution
Incorporating a fill slit or feature extending from one longitudinal edge to another on the package, with a patch of material that only seals on one side when heated, allowing for easier filling and sealing by enabling the package to be opened fully and sealed with only one layer, while retaining desirable features like re-closeable devices and handles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If side gussets are incorporated into flexible packaging to create re-closeable devices and handles, then package functionality and user convenience are improved, but sealing difficulty and leakage risk increase due to thickness variations and multiple film layers
Solution Approach 1:
The package is divided into distinct functional zones: side gussets with re-closeable devices and handles are segmented from the sealing areas. The sealing areas use simplified single-layer or reduced-layer constructions without the complexity of side gusset features, allowing reliable sealing while maintaining functional versatility in other package portions.
Solution Approach 2:
Different portions of the package have different structural qualities optimized for their specific functions. Side gussets have multiple layers and features for functionality, while sealing portions have simplified construction for reliability. This local differentiation allows each area to perform its intended function optimally without compromising the whole package.
2Strength
If multiple film layers are used in side gusseted packages to enhance durability and functionality, then package strength is improved, but heat-sealing complexity and equipment requirements increase
Solution Approach 1:
The package structure segments high-strength multi-layer regions (side gussets) from simplified sealing regions. This allows the package to maintain overall strength through strategic multi-layer construction while creating dedicated areas with reduced layer complexity that can be sealed using standard, simpler sealing equipment.
Solution Approach 2:
Different portions of the package have different material layer configurations optimized for their specific requirements. Side gussets use multiple layers for strength and functionality, while sealing areas use fewer layers or specially designed single-layer constructions that are easier to seal with conventional equipment, reducing overall device complexity.
3Volume of moving object
If side gussets are tucked in for final sealing to create a compact package, then package compactness is improved, but thickness variations and sealing difficulty increase
Solution Approach 1:
The package design segments the tucked side gussets from the sealing areas. The gussets are tucked to achieve compactness, while the sealing areas are positioned and constructed to maintain uniform thickness and simplicity, avoiding the complexity of sealing through multiple tucked layers. This segmentation allows compactness without sacrificing sealing ease.
Solution Approach 2:
Different portions of the package have different structural characteristics: tucked side gussets provide compactness in their local region, while sealing portions maintain uniform, simplified construction with consistent thickness. This local differentiation allows the package to be compact overall while having easily sealable areas for manufacturing.
4Ease of operation
If conventional pre-made packages are provided to customers for filling, then customer convenience is improved, but sealing capability deteriorates due to lack of specialized equipment
Solution Approach 1:
The package is segmented into customer-friendly pre-made portions with features like re-closeable devices and handles, and simplified sealing portions designed for ease of sealing. This segmentation allows customers to receive convenient pre-prepared packages while the simplified sealing areas can be sealed with basic equipment they are more likely to have access to.
Solution Approach 2:
Different portions of the package have different construction qualities: functional areas have complex features for customer convenience, while sealing areas have simplified, uniform construction that is easier to seal. This local quality differentiation maintains customer convenience while improving sealing capability with less specialized equipment.
5Adaptability or versatility
If wider sealing surfaces are used to accommodate handles and re-closeable devices, then package feature integration is improved, but sealing machine requirements increase
Solution Approach 1:
The package segments feature-rich areas (handles, re-closeable devices) from sealing areas. Features are integrated into side gussets and panel portions that do not require wide sealing surfaces, while sealing areas are positioned where standard sealing widths are sufficient. This segmentation allows feature integration without mandating wider sealing machines.
Solution Approach 2:
Different portions of the package have different functional qualities: feature areas have complex structures for versatility, while sealing areas have simplified, compact constructions. This local quality differentiation allows comprehensive feature integration while maintaining compatibility with standard sealing machine capabilities.
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
This solution simplifies the filling and sealing process, reduces the risk of leakage, and makes the packaging more cost-effective by allowing for a straightforward, one-layer seal, even with complex package designs, without compromising the inclusion of desirable features.
Implementation Method 1
with at least a top edge or portion of the patch being sealed to the inside of the package above the slit or feature
Data Source
AI summary
A flexible package having a fill opening or feature can be included in one or more of the package panels, with an internal fill patch provided proximate or about the fill opening. The patch can be initially sealed at one or more edge or portions to the internal surface of the respective package panel or panels, with a generally free edge or portion remaining unsealed until the package is filled with material contents.