Absorbent Article Waist End Opacity Design
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Solution Overview
Problem
Disposable absorbent articles, such as training pants, often have a translucent and thin appearance at the waist ends, which deviates from the look and feel of durable undergarments, leading to a perceived cheap image and quality issue, while maintaining performance and economy is a challenge.
Innovation Solution
The design incorporates a front and back belt portion with waist and leg end regions that have increased opacity and thickness, using additional materials like polyurethane and corrugated non-woven, and elastic strands to create a more undergarment-like appearance and feel without compromising fit, wearability, or absorbency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the number of layers of material is decreased towards the waist opening to improve breathability and reduce manufacturing cost, then breathability and economy are improved, but the waist ends have a translucent appearance and thin feel that deviates from durable undergarments
Solution Approach 1:
The patent applies different material layer configurations to different regions of the absorbent article. The waist end regions have multiple layers including outer cover, waist end flap, and adhesive layer to provide opacity and thickness, while other regions have fewer layers to maintain breathability and reduce cost. This local differentiation resolves the contradiction between overall cost reduction and specific aesthetic requirements at the waist ends.
2Shape
If additional materials like polyurethane and corrugated non-woven are added to the waist end regions to increase opacity and thickness, then undergarment-like appearance and feel are achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent divides the absorbent article into distinct functional regions: waist end regions requiring opacity and thickness, and other regions prioritizing breathability. The waist end flap is segmented from the main body, allowing independent material selection and assembly. This segmentation enables targeted complexity only where needed, rather than increasing overall device complexity.
3Ease of operation
If elastic elements are secured in an elastically contractible condition in the waist and leg openings to ensure full elastic fit, then fit and wearability are improved, but the waist ends may sag or leak if not properly supported
Solution Approach 1:
The patent incorporates adhesive layers on the waist end flaps before final assembly, pre-positioning them to bond with the outer cover. This preliminary adhesive action ensures that when the elastic elements contract during wear, the waist end regions remain securely attached and cannot sag or leak, even before the actual wearing action occurs.
Data Source
AI summary
The present disclosure is directed to an absorbent article that may comprise a main body graphic zone. A front belt portion and a back belt portion may each have a waist end region adjacent a waist opening, wherein front and back waist panels of an absorbent main body do not overlap with front or back waist end regions. The front and back belt portions may each have a leg end region adjacent the proximal edges. Left and right side panels of the front and back belt portions may each have a tummy belt region between the waist end region and the leg end region. And, the waist end region may have an opacity of at least 15 points greater than that of the tummy belt region.