Natural-Fiber Absorbent Packaging Balancing Barrier and Seal Strength
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Solution Overview
Problem
Existing absorbent article packages face challenges in achieving a combination of sufficient barrier properties against atmospheric moisture, recyclability, and required seal strength, particularly when using natural fibers and barrier film layers, while maintaining product integrity and shelf life.
Innovation Solution
The packages incorporate a multi-layered structure with different polymer materials for the barrier film layers, including low and high density polyethylene, to enhance seal strength and barrier properties, while ensuring recyclability, using a HuBa method to assess package life and minimize moisture absorption by super absorbent polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If plastic films are used for packaging absorbent articles, then barrier properties against atmospheric moisture are improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent uses composite packaging structures combining plastic film layers with plastic laminate layers. The plastic film provides moisture barrier properties while the plastic laminate layer enhances structural integrity and recyclability. This composite approach allows the package to meet barrier requirements while improving environmental acceptance through reusable rigid components.
2Adaptability or versatility
If carton board is used for packaging absorbent articles, then environmental friendliness and recyclability are improved, but barrier properties against atmospheric moisture deteriorate
Solution Approach 1:
The patent combines carton board with plastic film and plastic laminate layers to create a composite packaging structure. The carton board provides environmental friendliness and structural support, while the plastic layers contribute moisture barrier properties. This composite approach allows both materials to complement each other's strengths.
Solution Approach 2:
The packaging structure applies different materials to different functional zones: carton board for structural framework and environmental benefits, plastic film for moisture barrier zones, and plastic laminate for reinforcement areas. Each material is strategically placed where its specific properties are most needed.
3Adaptability or versatility
If natural fibers are used for packaging absorbent articles, then recyclability is improved, but seal strength deteriorates
Solution Approach 1:
The patent combines natural fiber-based materials with plastic laminate layers to create a composite packaging structure. The natural fiber portion maintains recyclability in paper recycling streams, while the plastic laminate portion provides the necessary seal strength and moisture barrier. This composite structure allows both requirements to be met simultaneously.
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 multi-layered structure provides superior package performance and shelf life, maintaining unactivated wetness indicators and super absorbent polymer effectiveness, while meeting recyclability and seal strength requirements.
Implementation Method 1
Plastic can exhibit barrier properties protecting the absorbent articles within the plastic packaging from atmospheric moisture
Implementation Method 2
The package comprises a side seal having a side seal strength that is greater than about 5.1 N/15 mm to about 15 N/15 mm
Implementation Method 3
The package material exhibits a HuBa value of greater than about 5 hours, according to the HuBa Test
Data Source
AI summary
A package of one or more absorbent articles is provided. The package comprises a package material comprising natural fibers. The package comprises a plurality of panels comprising a consumer-facing panel. The package is sealed such that the one or more absorbent articles are enclosed therein. The package material exhibits a HuBa value of greater than about 5.3 hours, according to the HuBa Test. The package is recyclable. The package comprises a vertical side seal having a side seal strength. The side seal strength is greater than about 5.1 N/15 mm and less than about 15 N/15 mm, according to Seal Tensile Strength Test.