Absorbent Package Line of Weakness and Reclosable Hood
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Solution Overview
Problem
Existing film packages for disposable absorbent articles, such as diapers and hygiene pads, face challenges in easy opening and reclosing, often leading to package destruction and inadequate protection from contaminants, especially in humid environments, while also being cost-ineffective for manufacturers.
Innovation Solution
The development of a film package structure with a line of weakness comprising perforations or scoring, designed to facilitate easy opening without deformation, and a reclosable hood structure that maintains package integrity and protects contents from airborne contaminants, utilizing a multilayer film with specific polymer compositions for weldability and tensile strength, along with reinforcement members and a graspable tab for secure reclosure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional film packages are used for disposable absorbent articles, then the package can be manufactured and sealed, but the package lacks easy opening features and tends to be destroyed during opening
Solution Approach 1:
The package incorporates a line of weakness consisting of a first array of perforations and a second array of perforations that are offset from the first array. This segmentation allows the package to be opened easily by tearing along the perforations while the offset configuration prevents complete separation, maintaining structural integrity for reclosure.
Solution Approach 2:
The package has different structural properties in different regions: the line of weakness area has reduced strength to enable easy opening, while the hood and seal areas maintain full strength for reclosure and protection. The reinforcement members are strategically placed to provide local strength where needed without interfering with the opening mechanism.
2Ease of operation
If the package is opened and left open for storage, then product access is easy, but the package cannot protect unused product from airborne contaminants in humid environments
Solution Approach 1:
The package hood is designed to be movable between an open position for product access and a closed position for protection. The hood can be reclosed over the package opening after product removal, and the dynamic seal mechanism allows the hood to be resealed to protect contents from contaminants while maintaining ease of access when needed.
3Reliability
If recloseability features are added to the package, then the package can be reclosed to protect product, but manufacturing costs increase
Solution Approach 1:
The hood structure serves multiple functions: it provides the opening mechanism through the line of weakness, acts as a protective cover when closed, and functions as a reclosure mechanism. The same structural elements that enable easy opening also provide the reclosure capability, eliminating the need for separate expensive reclosure components.
Solution Approach 2:
The package structure itself provides the reclosure functionality through the hood and seal mechanism without requiring additional active components. The hood can be manually reclosed and resealed using the existing seal structure, making the reclosure system self-contained and cost-effective.
4Strength
If reinforcement members are added to maintain package shape, then structural integrity is improved, but material costs and complexity increase
Solution Approach 1:
Reinforcement members are strategically placed only in specific locations where structural support is needed, such as the hood and seal areas, rather than throughout the entire package. This localized reinforcement maintains package shape and enables reclosure without adding unnecessary material or complexity to areas that don't require support.
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 enables easy access and reclosure of the package, maintaining product freshness and structural integrity, while reducing material costs and enhancing consumer convenience and protection against environmental contaminants.
Implementation Method 1
a line of weakness comprising perforations or scoring
Implementation Method 2
utilizing a multilayer film with specific polymer compositions for weldability and tensile strength
Implementation Method 3
a reclosable hood structure that maintains package integrity and protects contents from airborne contaminants
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A package formed of flexible polymeric film and having a line of weakness to facilitate opening of the package and to demarcate a package base and a package hood is disclosed. The package hood may be configured so as to serve as an effective package reclosure device whereby the package may be used to store the unused supply of articles following opening.