Absorbent Polymer Core for Compressible Packaging
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Solution Overview
Problem
Traditional absorbent articles with airfelt or cellulose cores are bulky, stiff when wet, and inefficient to ship due to high volume/weight ratios, leading to shipping inefficiencies and environmental impact, with a need for thinner, more comfortable, and cost-effective options that maintain absorbency and flexibility.
Innovation Solution
Development of absorbent articles with a substantially airfelt-free absorbent core using absorbent polymer material immobilized by a thermoplastic composition, allowing for higher compressibility without stiffness increase, optimizing packaging efficiency and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional airfelt or cellulose cores are used in absorbent articles, then absorbency is achieved, but the articles become bulky and stiff when wet
Solution Approach 1:
The patent changes the material parameters by replacing traditional airfelt or cellulose cores with absorbent polymer materials that maintain flexibility when wet. This parameter change allows the absorbent article to achieve both high absorbency and reduced bulkiness with maintained flexibility in the wet state
Solution Approach 2:
The patent uses composite materials by combining absorbent polymer materials with specific chipboard structures and adhesive systems. This composite approach creates an absorbent core that is both highly absorbent and flexible when wet, resolving the contradiction between absorbency and flexibility
2Reliability
If traditional airfelt absorbent articles are shipped, then absorbency is maintained, but shipping efficiency is reduced due to high volume/weight ratio
Solution Approach 1:
The patent changes the density parameter of the absorbent article by using absorbent polymer materials that provide high absorbency in a more compact form. This reduces the volume/weight ratio, improving shipping efficiency while maintaining absorbency capabilities
Solution Approach 2:
The patent extracts the unnecessary air space from traditional airfelt structures by using denser absorbent polymer materials. This extraction of excess volume reduces the overall package size and improves shipping efficiency without compromising absorbency
3Volume of stationary object
If absorbent articles are compressed to reduce packaging size, then packaging efficiency improves, but the articles become stiff and uncomfortable to wear
Solution Approach 1:
The patent changes the material composition to absorbent polymers that are inherently more compressible than traditional airfelt materials. This parameter change allows the articles to be compressed to smaller package sizes while maintaining flexibility and comfort when worn, as the polymer structure does not become stiff upon compression
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 results in thinner, more comfortable absorbent articles that can be compressed for efficient packaging, reducing shipping costs and environmental impact while maintaining absorbency and flexibility, allowing for smaller package sizes and reduced material usage.
Implementation Method 1
Absorbent particulate polymer material absorbs liquid and swells
Implementation Method 2
absorbent polymer material immobilized by a thermoplastic composition
Data Source
AI summary
A package comprising an interior space and an exterior surface may have a plurality of disposable absorbent articles disposed within the interior space of the package. Each of the disposable absorbent articles may have a topsheet; a backsheet; an absorbent core located between the topsheet and the backsheet. The absorbent products may exhibit an In-Bag Stack Height of less about 80 mm as measured according to an In-Bag Stack Height Test.